Mar Cor Purification WRO 300 Service Manual

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Mar Cor Purification

WRO 300/300 H Service Manual

Important User Information Copyright © 2012 by Mar Cor Purification, Inc. All rights reserved. No part of the contents of this manual may be reproduced, copied, or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of the publisher, unless it is for the purchaser's personal use. The information in this manual is subject to change without notice and does not represent a commitment on the part of Mar Cor Purification (MCP). MCP does not assume any responsibility for any errors that may appear in this manual. In no event will MCP be liable for technical or editorial omissions made herein, nor for direct, indirect, special, incidental, or consequential damages resulting from the use or defect of this manual. The information in this document is not intended to cover all possible conditions and situations that might occur. The end user must exercise caution and common sense when installing, using, or maintaining MCP products. If any questions or problems arise, call MCP Technical Services at 1-800-6333080.

Intended Use MCP products are intended to be installed and used as described in this manual and other related MCP literature.

Table of Contents

WRO 300/300 H

Table of Contents Important User Information . . . . . . . . . . . . . . . . . . . . . . . 2 Intended Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Safety Message Definitions . . . . . . . . . . . . . . . . . . . . . . 7 Safety Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . 7 List of Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Certification Marks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 IPR - Intellectual Property Rights . . . . . . . . . . . . . . . . . 10 Copyright . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Manufacturer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

P/N 3027437 Rev. B

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Intended Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reverse Osmosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Water Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pretreatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Microbiology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Check Water Quality . . . . . . . . . . . . . . . . . . . . . . . .

11 11 11 11 12 12 12 12

Technical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . Flow Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Components in Flow Diagram. . . . . . . . . . . . . . . . . . . . Flow Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Chemical Disinfection and Cleaning . . . . . . . . . . . . Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operator Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Supply Unit . . . . . . . . . . . . . . . . . . . . . . . . . . Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Y Coupling and Product Water Loop . . . . . . . . . . . . Tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RO Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Motor and RO Pump Unit . . . . . . . . . . . . . . . . . . . . Cooling Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flow Block Complete. . . . . . . . . . . . . . . . . . . . . . . . Needle Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Chemical Intake Unit . . . . . . . . . . . . . . . . . . . . . . . .

15 15 16 17 17 19 20 20 21 22 22 22 23 23 24 25 25 26 27 27

3

Table of Contents

WRO 300/300 H CPU Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC Relay Board (only WRO 300 H) . . . . . . . . . . . . External Communication Connections . . . . . . . . . . Heaters (only WRO 300 H) . . . . . . . . . . . . . . . . . . . Mains Power Cable . . . . . . . . . . . . . . . . . . . . . . . . . Description of Indications . . . . . . . . . . . . . . . . . . . . . . . Light Indications. . . . . . . . . . . . . . . . . . . . . . . . . . . . Buzzer Sounds . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operation Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auto Flush . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Run Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Changing from Run to Standby Mode. . . . . . . . . . . . . . Start After Power Loss. . . . . . . . . . . . . . . . . . . . . . . Hygiene Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . Manual Flush . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Chemical Disinfection and Cleaning . . . . . . . . . . . . Dwell and Rinse. . . . . . . . . . . . . . . . . . . . . . . . . . . . Preservation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Heat Disinfection (only WRO 300 H) . . . . . . . . . . . . Features — Extra Functions . . . . . . . . . . . . . . . . . . . . . Water Save Function . . . . . . . . . . . . . . . . . . . . . . . . Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Time Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . .

28 28 28 28 29 29 29 31 31 31 31 32 35 35 37 37 37 44 46 48 53 53 54 55

Replacements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Replacement Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Internal Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Changing Configuration Parameters. . . . . . . . . . . . . . . Internal Service Mode . . . . . . . . . . . . . . . . . . . . . . . . . . Enter Internal Service Mode . . . . . . . . . . . . . . . . . . Internal Service Loop. . . . . . . . . . . . . . . . . . . . . . . . PC Support Software . . . . . . . . . . . . . . . . . . . . . . . . . . USB Serial Driver Installation . . . . . . . . . . . . . . . . . GXL — Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . GXP — Preset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Checksum Status . . . . . . . . . . . . . . . . . . . . . . . . . . GWD - Download. . . . . . . . . . . . . . . . . . . . . . . . . . . Start the GWD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Presets and Defaults. . . . . . . . . . . . . . . . . . . . . . . . . . . Change Presets for WRO 300 H . . . . . . . . . . . . . . . RO Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tank Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Water Save . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . User Interface Panel (LCD) . . . . . . . . . . . . . . . . . . .

4

59 59 59 59 60 71 71 74 74 75 75 75 79 82 83 83 84 85 87

P/N 3027437 Rev. B

Table of Contents

WRO 300/300 H

Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 Disinfection Protocol Manager. . . . . . . . . . . . . . . . . 90 Chemical Disinfection . . . . . . . . . . . . . . . . . . . . . . . 95 Time Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Time Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 Remote . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 External relay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 WRO 300 H. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 WRO 300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

P/N 3027437 Rev. B

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Water Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total Chlorine . . . . . . . . . . . . . . . . . . . . . . . . . . . . Residual Hardness . . . . . . . . . . . . . . . . . . . . . . . . Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . Changing Prefilter Cartridges . . . . . . . . . . . . . . . . . . . General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replacing Carbon Block Filters . . . . . . . . . . . . . . . Power Supply Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Protective Earth (PE). . . . . . . . . . . . . . . . . . . . . . . Adjusting Product Water Flow. . . . . . . . . . . . . . . . . . . Using Adjustment Tool 3027493 . . . . . . . . . . . . . . Using Adjustment Tool WT100TEST. . . . . . . . . . . Conductivity Adjustment . . . . . . . . . . . . . . . . . . . . . . . Adjustment Procedure . . . . . . . . . . . . . . . . . . . . . . Checking Operator Panel . . . . . . . . . . . . . . . . . . . . . . Checking Chemical Intake O-rings . . . . . . . . . . . . . . . Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . WRO 300/300 H Battery . . . . . . . . . . . . . . . . . . . . Battery and Electronic Waste Handling . . . . . . . . . Waste Handling . . . . . . . . . . . . . . . . . . . . . . . . . . .

105 105 105 105 105 105 105 106 106 106 106 106 106 108 109 109 110 111 111 111 111 112

Electrical Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Protective Earth Test . . . . . . . . . . . . . . . . . . . . . . . . . Test Equipment for PET Test. . . . . . . . . . . . . . . . . PET for WRO 300 . . . . . . . . . . . . . . . . . . . . . . . . . PET for WRO 300 H . . . . . . . . . . . . . . . . . . . . . . . Electrical Leakage Test (ELT). . . . . . . . . . . . . . . . . . . ELT Test Equipment . . . . . . . . . . . . . . . . . . . . . . . ELT General Conditions . . . . . . . . . . . . . . . . . . . . ELT WRO 300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . ELT WRO 300 H . . . . . . . . . . . . . . . . . . . . . . . . . . Earth Current Limits. . . . . . . . . . . . . . . . . . . . . . . .

113 113 113 113 113 113 113 113 114 114 114

5

Table of Contents

WRO 300/300 H

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Performance and Specification . . . . . . . . . . . . . . . . . . Chemical Disinfection . . . . . . . . . . . . . . . . . . . . . . . . . Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Materials Contacting Product Water . . . . . . . . . . . . . . Environmental Data . . . . . . . . . . . . . . . . . . . . . . . . . . Electromagnetic Environment . . . . . . . . . . . . . . . . . . . Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

115 115 119 119 120 120 121 124

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internal Error (103:N). . . . . . . . . . . . . . . . . . . . . . . Internal Error (104) . . . . . . . . . . . . . . . . . . . . . . . . Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Heat (only WRO 300 H). . . . . . . . . . . . . . . . . . . . . Chem/Rinse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Boot Loader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

125 125 125 127 131 132 138 139 141

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

6

P/N 3027437 Rev. B

Preface

WRO 300/300 H

Preface This manual provides the information needed to carry out maintenance and to identify and remedy any fault that may occur on the WRO 300 water purification unit and the WRO 300 H water purification unit. The complete model name WRO 300 unit or WRO 300 H unit is used only when the information is specific and only valid for one of the models. The WRO unit refers to information valid for both models.

Related Manuals The list below shows manuals related to this Service Manual. Always specify the revision level when ordering the manual for your water purification machine. Installation Guide, WRO 300/300 H

3027502

Operator’s Manual WRO 300

3027435

Operator’s Manual WRO 300 H

3027436

Safety Message Definitions WARNING Is used to alert the user/operator not to take a certain action, which if taken can cause a potential hazard and result in a serious adverse reaction, injury or death. A warning may also be used to alert the user/operator to take a certain action to avoid the potential hazard as above. CAUTION Is used to alert the user/operator to take a certain action to protect against a potential hazard which, if ignored, could have an adverse effect on the patient or the device. A caution may also be used to alert the user/operator not to take a certain action to avoid the potential hazard as above. NOTE A reminder to the user/operator on normal treatment activity and on what is a suitable action in a particular situation.

Safety Considerations WARNING Unauthorized installation, modifications, alterations or repair of the WRO unit may result in malfunctioning or have other serious consequences for the safe operation of the equipment.

P/N 3027437 Rev. B

7

Preface

WRO 300/300 H CAUTION • Dialysis machines that are supplied with water from the WRO unit, must comply with IEC 60601-2-16. • The WRO unit should only be operated by persons trained in the use of this equipment and who have studied the instructions in the Operator’s Manual. If the WRO unit does not perform as described in the Operator’s Manual, it should not be used until the condition is rectified. • The operator should pay attention to alarms and follow the instructions, warnings, cautions and notes given in the manual. • The use of mobile telephones or communication equipment in the vicinity of the WRO unit could adversely influence the performance of the machine. • The WRO unit needs special precautions regarding EMC and needs to be installed and put into service according to the EMC information provided in the Operator’s and Service Manual (refer to Technical Data on page 115). • The WRO unit is not suitable for use in the presence of a flammable anesthetic mixture with air or with oxygen or nitrous oxide. • The WRO unit will perform as designed only if it is used and maintained in accordance with MCP’s instructions. Any warranties made by MCP with respect to the WRO unit, are void if the equipment is not used in accordance with the instructions provided. MCP will not accept responsibility for any damage or injury resulting from improper use or maintenance or unauthorized repair. • The user must verify the quality of the protective earth in the installation. • U.S. Federal law restricts this device to sale by, or on the order of, a physician. NOTE • On delivery the WRO unit is filled with preservation and antifreeze solution. This solution must be rinsed out before the WRO unit is put into operation. • During transportation and storage the equipment must be kept in its original packing. If transportation or storage time is more than 15 weeks the environmental data relating to the operation must be fulfilled (refer to Technical Data on page 115). • The WRO unit is intended for continuous operation.

8

P/N 3027437 Rev. B

Preface

WRO 300/300 H

List of Symbols Alternating current Protective earth (ground) Warning, consult accompanying documents Off (power, disconnection from the mains) On (power, connection to the mains)

Type B, applied part

Handle with care

This way up

Keep dry

Separate collection for electrical and electronic equipment

Year of manufacturing The WRO 300/300 H is protected against dripping water Recycling symbol -General CB

Reject water connection Feed water inlet connection Loop connections (Product water outlet and return)

P/N 3027437 Rev. B

9

Preface

WRO 300/300 H

ME equipment and ME systems that include RF transmitters or that intentionally apply RF electromagnetic energy for diagnosis or treatment shall be labeled with this symbol.

Certification Marks The CSA(C-US) mark indicates that the WRO 300/ 300 H water purification units conform to the requirements related to safety of medical devices for the US and Canada. The C and the US adjacent to the CSA mark indicates that the WRO 300/300 H water purification units have been evaluated to the applicable ANSI/UL and CSA standards for use in the US and Canada.

IPR - Intellectual Property Rights Copyright © 2012 Mar Cor Purification, Inc.

Trademarks DIALOX® is a trademark registered in several countries, including Sweden, United Kingdom and Japan by their respective owners. MINNCARE® is a trademark of Minntech registered in several countries including United States and United Kingdom. MINNCLEAN® is a trademark of Minntech registered in several countries including the United States. SteriChek® is a trademark registered in several countries including the United States and Japan by their respective owners. ULTRASIL® is a trademark of Ecolab registered in several countries including Australia and Canada.

Manufacturer Mar Cor Purification, Inc. 14550 28th Avenue North Plymouth, MN 55447 USA Phone: 1-800-633-3080 Fax (Customer Service): 1-763-210-3868 www.mcpur.com

10

P/N 3027437 Rev. B

Introduction

WRO 300/300 H

1 Introduction 1.1 Intended Use The MCP WRO 300/300 H Water Purification Unit is intended to be used as a dialysis accessory to produce water through reverse osmosis for one hemodialysis equipment. The WRO 300/300 H can be connected to hemodialysis equipment used both in hospitals and in home environments, in conjunction with appropriate pre and post treatment units, as a part of a water treatment system designed to meet applicable regulations or standards for water for dialysis, for example current AAMI and Federal (U.S.) standards. CAUTION The water produced by the WRO unit should be analyzed at installation and on a regular basis to verify that it conforms to applicable regulations or standards for water for dialysis.

1.2 Reverse Osmosis Reverse osmosis (RO) is a membrane process that is the most widely used technique for purification of water for dialysis. When the feed water is in contact with the semipermeable membrane (the most vital part of the system) and a high pressure is applied, water will flow through the membrane to the product water side. Most of the other constituents (dissolved salts, particles, bacteria and pyrogens) will remain on the feed water side of the membrane and be flushed to drain as reject water.

Pressure

feed water

membrane

reject water

product water

Fig.1.1 — Principal of reverse osmosis

1.3 General Function A high-pressure pump feeds water (usually pretreated water) into the RO module, containing the membrane. The product water leaves the RO module through the product water outlet into the product water loop, to which the dialysis machine is connected. The reject water leaves the WRO unit via the drain outlet.

P/N 3027437 Rev. B

11

Introduction

WRO 300/300 H

1.4 Water Quality 1.4.1 Pretreatment The quality of the incoming water varies from one place to another. Different pretreatment equipment may be required depending on the local water quality and regulations. An acceptable quality of the feed water is required, that is in accordance to Technical Data on page 115. As a minimum, 5 micron prefiltration must be applied. Additional pretreatment, such as carbon filters and softener, may be required depending on the feed water quality. WARNING This device does not remove chlorine and chloramines from the water. Carbon filtration to remove these substances is therefore required if the total chlorine concentration might exceed 0.1 mg/l (ppm). Severe patient injury may otherwise occur. Ensure by testing or by other means that the total chlorine concentration is below 0.1 mg/l (ppm) prior to initiating dialysis treatment.

1.4.2 Microbiology The water quality is a very important factor in achieving and maintaining an adequate quality of the dialysis fluid. The microbiological quality of the product water depends not only on technical parameters such as retention rates of membranes, but also to a large extent on other factors: •

Feed water shall comply to relevant standards for drinking water.



Handle taps and connectors in such a manner to avoid microbiological contamination (any pretreatment device, the WRO unit and the dialysis machine).



Provide for regular and pro-active disinfection of the WRO unit.



Set up air gap between the drain outlet and the drain to avoid microbiological contamination from the drainage system. Refer to the Installation Guide for the WRO unit.

1.4.3 Check Water Quality The ions in the water effect the conductivity; the ability to conduct an electric current. To get an indication of the water quality from a chemical perspective, the WRO unit measures the conductivity of the feed water and the product water. The conductivity values (µS/cm) indicate the performance of the WRO unit. Further water tests are, however, necessary. Refer to Water Testing on page 105.

12

P/N 3027437 Rev. B

Introduction

WRO 300/300 H

CAUTION The conductivity value does not always indicate the suitability of the water for dialysis. For example, aluminium may be present in concentrations well exceeding recommended standards without affecting the conductivity. Therefore the quality of the product water, used for dialysis, should be verified by regular analysis of the water.

P/N 3027437 Rev. B

13

Introduction

WRO 300/300 H

This page is blank.

14

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

2 Technical Description 2.1 Flow Diagrams 16 1

2 C1

Flow block

15

3

T3

Constant flow valve

Feed water

OFVA INVA 10

Tank air vent

Spray nozzle

Flow meter

28 5

27

Chemical intake pump

Drain 26

25

Chemical Connector

L.H.

13 C2

Loop

14

9 8

Product water

Heater B

Tank 4

6

RO pump

L.L. 7

Chemical Intake

12 T1

11

RO module 18

L.E.

17

24

Constant flow valve

Needle valve T2

20

F

BYVA 23

REVA

19

Heater A

21

22

Drain outlet

Fig.2.1 — Flow diagram for the WRO 300 H unit Drain

1

2 C1

15

3

Flow block

Constant flow valve

Feed water

OFVA INVA

Tank air vent

Spray nozzle 28 27

Chemical intake pump

Drain Chemical Connector

26

5

25

L.H.

L.L. 7

24

13

T1

C2

L.E.

Loop

14

9 8

Product water

Tank 4

6

Chemical Intake

12

RO pump

RO module 18 17

Constant flow valve

Needle valve 20

BYVA

REVA

19

Drain outlet

Fig.2.2 — Flow diagram for the WRO 300 unit Drain

Components in the grey area in the illustrations above are mounted on the flow block.

P/N 3027437 Rev. B

15

Technical Description

WRO 300/300 H

2.2 Components in Flow Diagram

16

Components

Additional Information

1

Inlet valve (INVA)

Two-way solenoid valve

2

Conductivity cell (C1)

Monitor feed water conductivity

3

Constant flow valve

Approximately 4000 ml / minute

4

Tank

Providing air gap

5

High level sensor (LH)

Float level switch

6

Low level sensor (LL)

Float level switch

7

Empty level sensor (LE)

Optical sensor

8

RO pump

9

RO module

The WRO 300 unit and the WRO 300 H unit have different membranes and different pressure vessels.

10

Flow meter

In product water line (Can also be installed in the WRO 300 unit, refer to separate Spare Part Instruction).

only in the WRO 300 H unit

11

Heater B

In product water line

only in the WRO 300 H unit

12

Temperature sensor (T1)

For product water

13

Conductivity cell (C2)

Monitor product water conductivity

14

Product water loop

To and from the dialysis machine

15

Overflow valve (OFVA)

Two-way solenoid valve for product water return

16

Temperature sensor (T3) product water return

17

Needle valve

For reject recirculation

18

Constant flow valve

1200 ml / minute when BYVA (19) is closed.

19

Reject bypass valve (BYVA)

The two-way solenoid valve, when active (open), most of the reject water bypasses the constant flow valve (18) and the pressure in the WRO unit is minimized.

20

Reject valve (REVA)

Three-way solenoid valve diverts reject water either to tank or to drain.

21

Flow indicator

Recirculated reject water

22

Heater A

Recirculated reject water

23

Temperature sensor (T2)

Recirculated reject water

24

Chemical intake

25

Three-way valve

Manual operation

26

Optical sensor

Detects the wand

27

Chemical intake pump

only in the WRO 300 H unit

only in the WRO 300 H unit

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

28

Components

Additional Information

Tank air vent

Connects the tank to the atmosphere and is also used as overflow connection.

2.3 Flow Description 2.3.1 Run Flow block T3 C1

Constant flow valve

Feed water

OFVA INVA Loop

Tank air vent

Spray nozzle

Flow meter

T1

C2

L.H.

Chemical intake pump

Drain Chemical Connector

L.L.

Chemical Intake

Product water

Heater B Tank RO pump

RO module

Constant flow valve

L.E.

Needle valve T2

F

BYVA

REVA

Heater A

= only during Water Save phases if the function is enabled

Drain outlet

Drain

Fig.2.3 — Flow description

The feed water enters the WRO unit through the inlet solenoid valve INVA. The conductivity cell C1 monitors the feed water conductivity. The feed water passes the constant flow valve which regulates a steady flow of water into the tank, approximately 4 l/min, if the feed water pressure is above minimum pressure. The low and high level sensors in the tank (LL and LH) detect the water level and the program controls the opening and closing of the inlet solenoid valve INVA. INVA is open during filling, and closes when the water level reaches LH. INVA opens again when the water level is below LL. If the water level in the tank gets too high, excess water is drained through the tank air vent (overflow connection). The RO pump stops when the empty level sensor LE detects air. The RO-pump creates the feed water flow required for the reverse osmosis process. The pump speed ramps up during the initial two to three seconds. Higher pressure forces more water through the membrane. (The manually adjusted needle valve effects the water pressure in the RO module.).

P/N 3027437 Rev. B

17

Technical Description

WRO 300/300 H

NOTE High flow velocity over the RO membrane is important for proper function of the WRO unit. Part of the reject water is recirculated through the needle valve, while still maintaining low water consumption. Also, excess product water is recirculated to save water. When the product water leaves the RO module in a WRO 300 H unit, it flows by the flow meter, the heater B, and the temperature sensor T1, (in a WRO 300 unit only T1). The conductivity cell C2 monitors the product water conductivity. The product water leaves the WRO unit through the product water outlet and flows to the dialysis machine through the product water loop. Excess product water, not used by the dialysis machine, returns to the tank through the overflow solenoid valve OFVA (for functionality of the OFVA, refer to page 26). In a WRO 300 H unit, the water flows across the temperature sensor T3 before entering the tank. The reject water leaves the RO module and flows through the constant flow valve which regulates a steady flow of reject water to the threeway solenoid valve REVA. The rest of the reject water goes back to the RO pump through the needle valve. NOTE As the needle valve is closed, it creates higher pressure in the RO module and lower recirculation flow. Do not close the valve more than necessary to obtain the required product water flow and pressure. Otherwise, ions build up at the membrane surface and cause increased product water conductivity which may shorten the lifetime of the membrane. REVA diverts the reject water either to the drain or back to the tank (if the water save function is enabled). In a WRO 300 H unit the water also passes the flow indicator F, the heater A and the temperature sensor T2 when recirculating to tank. The tables below illustrate an example of the relationship of the water flow in the WRO unit during run, when the total amount of water flow is 5.0 liters/minute.

18

From

To

Type of water

Flow1 liter/min

RO module

product water loop

total product water

1.1

RO module

needle valve and constant flow valve

total reject water

3.9

constant flow valve

drain outlet

reject water, to drain

1.2

needle valve

RO pump

reject water, recirculated

2.6

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

Flow1 liter/min

From

To

Type of water

product water loop

tank

product water, recirculated

0.7

tap

tank

feed water

1.7

product water loop

dialysis machine

product water

0.5

1. In this example:

Sum of Flows to and from the RO module, (according to example above)

Flow liter/ minute

feed water to the WRO unit + product water (recirculated) + reject water (recirculation part) = total volume to RO module

1.7+ 0.7+ 2.6 = 5.0

total product water + total reject water = total volume from RO module

1.1+ 3.9 = 5.0

2.3.2 Chemical Disinfection and Cleaning When the disinfection wand is connected to the chemical intake at the front of the WRO unit, the three-way valve in the chemical intake unit opens towards the chemical intake pump and the tank. The other end of the wand is inserted into an external container with cleaning or disinfection solution. The chemical intake pump feeds the solution through the wand into the tank. The optical sensor detects if the wand is connected or disconnected. When removed, the chemical intake pump stops and the three-way valve closes towards the chemical connector and instead allows for recirculation from tank through the chemical intake unit, back to the tank, (during chemical disinfection, cleaning or rinse). REVA also recirculates to the tank during some phases of chemical disinfection, cleaning or rinse. CAUTION The chemical container must be located below the chemical intake. CAUTION When requested by the WRO unit, remove the disinfection wand from the chemical intake. Failure to remove the disinfection wand can cause siphoning of the chemical solution from the bottle resulting in the tank overflowing chemical solution through the back of the machine.

P/N 3027437 Rev. B

19

Technical Description

WRO 300/300 H

2.4 Components 2.4.1 Overview

Fig.2.4 — The WRO 300 H unit overview

20

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

Fig.2.5 — The WRO 300 unit overview

2.4.2 Casing The casing consists of four pieces as shown in the figure below. Casing top

Detachable cover

Casing back

Tray

Fig.2.6 — Casing

P/N 3027437 Rev. B

21

Technical Description

WRO 300/300 H

2.4.3 Operator Panel The circuit board with the display, buttons, buzzer and LCD screen is covered with an overlay. Overlay depends on model; WRO 300 unit or WRO 300 H unit. Arrow buttons

LCD

Disinfection button

Mute button

Lamp indication Power ON

Run /Standby button

Fig.2.7 — Operator Panel

2.4.4 Power Supply Unit The power supply unit adjusts automatically to the supplied voltage (100, 115 or 220 to 240 VAC with 50 or 60 Hz). The internal voltage supply is 24 VDC except for the heaters that are supplied with mains power voltage, refer to Heat on page 87.

2.4.5 Fan The fan cools the power supply unit. Fuses (only used in the WRO 300 H unit)

Mains power switch

Fan

Power inlet

Fuses for the WRO 300 H unit Voltage1

Fuse size

MCP Order Number

100 - 115 VAC

15 A SLO BLO

ME20165

1. Preset S32 must be changed, from GXP, to select the correct mains voltage.

22

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H 2.4.6 Y Coupling and Product Water Loop

The product water loop consists of two hoses from the WRO unit connected to the parallel connections at the Y coupling. The hose from the third connection at the Y coupling is connected to the dialysis machine.

2.4.7 Tank The tank is supplied with feed water from the feed water inlet and product return water and, if the water saving function is in use, also reject water from the reject valve (REVA). The water is distributed to the RO module or to the chemical intake pump (during disinfection). 2.4.7.1 Tank Air Vent The tank air vent connects the tank to the atmosphere. If the water level reaches the tank air vent the excess water leaves the tank. To avoid back contamination of the feed water supply there is an air gap between the feed water at the top of the tank, above the tank air vent. NOTE The tank air vent outlet must be connected with an air gap to drain. If a hose is connected to the tank air vent the hose should have a constant slope.

Feed water inlet

Temperature sensor (T3) (only WRO 300 H) Product water return

Spray nozzle

Level sensor 1 (High)

Tank air vent From chemical intake pump

Level sensor 2 (Low)

Reject water

Level sensor 3 (Empty)

To chemical intake Temperature sensor (T2) (only WRO 300 H)

To RO pump (RO module)

Fig.2.8 — Tank

2.4.7.2 Spray Nozzle The feed water enters the tank unit through a spray nozzle to spray the walls of the tank.

P/N 3027437 Rev. B

23

Technical Description

WRO 300/300 H

2.4.7.3 Level Sensors There are three level sensors in the tank to monitor the water level. Level sensor

Description

Low

The high level sensor (LH) and the low level sensor (LL) are float level switches.

High Empty

The empty level sensor (EL) is an optical sensor.

NOTE • Avoid touching the optical sensors detection area with fingers and do not expose it to dust. Optical sensors may be cleaned with a gentle detergent or soap. Substances containing alcohol must not be used. • The float level switch can be permanently damaged if it is dropped on a hard surface. • To be able to use float level switches the program version must be 4.0 or higher.

2.4.8 RO Modules Quick connector for pressure gauge

Product water outlet

Reject water outlet

2 holes, used to remove the end plug with withdrawing tool

Feed water inlet

Fig.2.9 — RO module for the WRO 300 H unit

. NOTE • In a WRO 300 H unit, a new membrane element must be exposed to at least one heat cycle before the rejection rate is acceptable. • The membrane element must not be exposed to a pressure exceeding 3 bar at temperatures above 45 °C.

24

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

Feed water inlet

Quick connector for pressure gauge There are 4 holes, used to remove the end plug with withdrawing tool

Reject water outlet Product water outlet

Fig.2.10 — RO module for the WRO 300 unit.

2.4.9 Motor and RO Pump Unit Cooling fan

Motor controller unit Pump motor

RO pump

Fig.2.11 — RO pump

The RO pump creates the required pressure and flow for the reverse osmosis process and circulates the water in the WRO unit. It is driven by a 24 VDC brushless motor with a controller unit.

2.4.10 Cooling Fan The pump motor and the motor controller unit are cooled by a separate, internal cooling fan.

P/N 3027437 Rev. B

25

Technical Description

WRO 300/300 H

2.4.11 Flow Block Complete A number of the components required for the operation of the WRO unit are located in the flow block.

Bypass valve (BYVA) Reject valve (REVA)

Inlet valve (INVA)

Return overflow valve (OFVA)

Conductivity sensor (C1) Temperature sensor (T1)

Conductivity sensor (C2) Feed water to tank Return overflow line to tank

Reject water line

To product water outlet

From tank air vent From reject outlet on the RO module

To needle valve

Fig.2.12 — Flow block

Sensors

Description

Conductivity sensors

C1 in the feed water line and C2 in the product water line measure the conductivity of the water.

Temperature sensor

T1 measures the temperature in the product water line.

Valves

Description

Reject valve (REVA)

Three way solenoid valve, either diverts to drain or tank.

Inlet valve (INVA)

Two way solenoid valve, opens and closes for feed water.

Bypass valve (BYVA) Two way solenoid valve, when open (active) the flow bypasses the constant flow valve.

26

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

Valves

Description

Return overflow valve (OFVA)

The spring-assisted solenoid valve (OFVA) has two functions: • To maintain pressure in the loop. When deactivated (run), the valve remains closed (= no flow) at pressures below 0.25 MPa (2.5 bar). When the pressure increases further, it gradually opens and lets water through. • To relieve the pressure in the loop during certain modes of operation. When activated, the valve opens to the inlet water tank. This will minimize the flow from the product water loop into the dialysis machine.

S

Product water loop (Pressure)

Constant Flow valve

This valve gives a steady flow of 1.2 ±0.1 l/min.

2.4.12 Needle Valve

Needle valve

Fig.2.13 — Needle valve

The needle valve controls the desired product water consumption (1.1 l/min) at a loop pressure of 1.5 bar. NOTE The setting of the needle valve affects the reject recirculation flow. Turning the needle valve clockwise towards closed position will reduce recirculation and increase module pressure.

2.4.13 Chemical Intake Unit The chemical intake unit supplies the WRO unit with chemicals for disinfection or cleaning. The optical sensor detects if the disinfection wand connector is inserted in the chemical intake. Disinfection wand and connector

Chemical intake unit

Chemical intake

Optical sensor

Fig.2.14 — Chemical intake P/N 3027437 Rev. B

27

Technical Description

WRO 300/300 H

2.4.14 CPU Board The CPU board contains most of the electronics that control the function of the WRO unit.

2.4.15 AC Relay Board (only WRO 300 H) The AC relay board contains the electronics that control the heater rods.

2.4.16 External Communication Connections At the rear side of the WRO unit there are three external communication connections. These are used for external communication, logging of data to a PC, and downloading upgraded software from a PC. The required cables are optional and may be ordered from MCP.

Connection

Function

Description

P500

External communication

Currently not used.

P501 Black

Software communication

Connection to PC.

P502 Yellow

External Signal/Remote Start

Currently not used.

Green1

1. Blue in older version of WRO unit.

NOTE • Only cables specified by MCP must be used when connecting the WRO unit to external equipment. • Be sure to use the correct cable type to the yellow connector when an external alarm is connected, refer to Connection of External Equipment on page 118.

2.4.17 Heaters (only WRO 300 H) The WRO 300 H unit is equipped with two heaters with different properties. The electrical connections are therefore different and marked REJECT and PRODUCT on the AC relay board. Mount the reject water heater to the left and the product water heater to the right as seen in the figure below — if mounted incorrectly steam may come out from the tank air vent. CAUTION Ensure that the heaters are mounted in the correct position.

28

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

Heater PRODUCT Heater REJECT

Flow indicator

Flow meter Temperature sensor (T2)

Fig.2.15 — Heaters

2.4.18 Mains Power Cable Mains power cable is supplied with the RO and is a hospital grade, 15 Ampere rated capacity, detachable type cord.

2.5 Description of Indications 2.5.1 Light Indications The light indications of the operator’s panel are described in the tables below. Time Flash Indication

On

Off

Slow flash

0.4 sec

2.0 sec

Medium flash

0.4 sec

0.4 sec

Fast flash

0.2 sec

0.2 sec

Indications

P/N 3027437 Rev. B

Description

Green

General

Indicates that the WRO 300 is energized.

Green

Steady light

Run mode, auto flush or manual flush in progress.

Slow flash

The auto flush function is activated (only in standby mode).

Fast flash

Insufficient feed water supply (only in run mode).

29

Technical Description

WRO 300/300 H

Indications

Description

Yellow Steady light Medium flash

Chemical disinfection or cleaning is in progress. The disinfection wand connector is inserted into the chemical intake. During selection of procedure in SELECT or

CHEM SELECT. The chemical intake phase is paused. Forced rinse is required (404

RINSE

REQUIRED). Red

Medium flash

Unconfirmed notification, info, alarm or stop conditions are present.

Steady light

Notification, info, alarm or stop condition has been confirmed.

NOTE Medium flash of ton.

30

or

alerts the user to push the flashing but-

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H 2.5.2 Buzzer Sounds

The buzzer sounds of the Operator’s panel are described in the table below. Buzzer Sound

Description

Notification Alarm

Stop

2.6 Operation Functions 2.6.1 Standby Mode The actions in the table below are possible from standby mode. Action Change of presets from GXP Auto flush

Heat disinfection activated by time channel WRO 300 H only

Run activated by time channel

Additional information EXTERNAL PRESET displays when GXP is connected. Slow flash of during standby indicates that the auto flush function is activated. Slow flash of during standby indicates that automated heat disinfection by time channels is preset.

Refer to Standby Mode (this section)

Auto Flush on page 31

Initiate Heat Disinfection on page 48

Slow flash of during standby indicates that automated run by time channels is preset.

2.6.2 Auto Flush The auto flush function exchanges the water in the WRO unit during standby. During auto flush, indicated by steady light of , the water alternates between going to drain and going back to the tank. Auto flush will take place at preset intervals if enabled in preset S185; changeable from the internal service mode or the GXP software. Refer to Auto Flush on page 31. Two time values for auto flush are preset; the time remaining in standby before initiating the flush, and the time that the flush will last;

P/N 3027437 Rev. B

31

Technical Description

WRO 300/300 H

S139 and S140 (only changeable from the GXP software, refer to Auto Flush on page 31). NOTE Auto flush mode has the same functionality as run mode but during a finite time period of maximum 100 minutes. The WRO 300 H unit performs a temperature test when initiating auto flush.

2.6.3 Run Mode WARNING This device does not remove chlorine and chloramines from the water. Carbon filtration to remove these substances is therefore required if the total chlorine concentration might exceed 0.1 mg/l (ppm). Severe patient injury may otherwise occur. Ensure by testing or by other means that the total chlorine concentration is below 0.1 mg/l (ppm) prior to initiating dialysis treatment. 2.6.3.1 Initiate Run When the WRO unit is in standby mode, press (steady light).

until light goes on

A temperature check in the reject water line is always performed on a WRO 300 H unit before starting run mode. Active cool down is performed if a temperature of 40 ºC or above is measured by the temperature sensor in the reject water line (T2). Refer to Active Cool Down on page 52. When run is initiated a peak test is performed. Refer to Peak Test on page 34. 2.6.3.2 Flow Refer to Flow Description on page 17. NOTE • As the needle valve is closed, it creates higher pressure in the RO module and lower recirculation flow. Therefore, do not close the valve more than necessary to obtain the required product water flow and pressure. Otherwise ions build up at the membrane surface and this causes increased product water conductivity and may shorten the lifetime of the membrane. • If the water save function is active, the reject valve (REVA) alternates continuously between open to drain and open to tank. Refer to Water Save Function on page 53. 2.6.3.3 Water Level in Tank During Run During run mode the inlet valve (INVA) opens when the level is below the low level sensor (LL) allowing water to enter the tank. The inlet valve closes again when the water reaches the high level sensor (LH). A supervision function in the WRO unit controls the time for filling up the tank with water. The purpose is to limit the risk of excessive

32

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

amounts of water leaving the WRO unit through the air vent in case of a failure of level sensor LH. Alarm 104 INVALID WATER LEVEL displays if the opening time for INVA exceeds the value for preset S233 (only changeable from GXP, refer to Tank on page 23). The RO-pump stops if no water is indicated by empty level sensor (LE), plays.

flashes fast and 204 INSUFFICIENT WATER SUPPLY dis-

If the empty level sensor (LE) detects air at the same time as the low level sensor (LL) indicates water, the reject valve (REVA) diverts the reject water to the tank for five seconds. The water then flushes the empty level sensor (LE) to remove possible air bubbles from the optical sensor. 2.6.3.4 Conductivity Measurement The product water conductivity is measured by the conductivity sensor (C2). The values from the conductivity sensors for feed water (C1) and for product water (C2) are used to calculate the rejection rate, refer to Rejection Rate on page 34. The conductivity in water is affected by the temperature of the water. Therefore the conductivity measurements from both C1 and C2 are temperature compensated, using the product water temperature sensor (T1). NOTE The salt rejection ability of an RO membrane is a function of several factors, such as the conductivity and composition of the feed water, the water temperature and the pressure in the system. The product water conductivity and rejection rate should not be used as an absolute measure of the quality of the water but rather as an indicator of changes in performance over time. 2.6.3.5 Preset of Conductivity Limits The three conductivity limits (notification/alarm/stop) can be changed from internal service or from GXP. 201 CONDUCTIVITY NOTIFICATION is issued when entering standby mode if the conductivity has exceeded the preset notification limit for more than 30 consecutive seconds during run. 202 CONDUCTIVITY ALARM is issued during run if the product water conductivity has exceeded the preset alarm limit for more than 30 consecutive seconds. The buzzer can be muted and the WRO unit remains in run to allow finishing the dialysis treatment. 203 CONDUCTIVITY STOP is issued and the WRO unit stops if the product water conductivity has exceeded the preset limit for stop for more than 30 consecutive seconds during run.

P/N 3027437 Rev. B

33

Technical Description

WRO 300/300 H

The conductivity limits should be set in relation to the feed water conductivity. Local regulation must be considered when determining the values of the limits. NOTE High product water conductivity value can be caused by several factors, such as fouling or degradation of the RO membrane or change in the feed water quality. 2.6.3.6 Peak Test The intention of the conductivity peak test is to verify the function of the conductivity measuring circuit of the product water. During standby, salts will migrate from the feed water to the product water side of the membrane until the concentrations have equalized over the membrane. This process will start as soon as the WRO unit is stopped and the pressure is released. The elevated conductivity of the product water will result in a momentary increase in the product water conductivity at next start up. Because of this, the conductivity supervision is disabled for 5 minutes during run mode start-up to avoid disturbing conductivity alarms. Supervision is disabled whether the Peak test is enabled or disabled (S186) except when the WRO unit is stopped by alarm 203 CONDUCTIVITY STOP. The peak test of the product water conductivity is performed during the start-up phase of run mode, if the WRO unit has been in standby for 10 minutes or more and if enabled in preset S186. Enabled from internal service mode or GXP software, refer to Activate Functions on page 70 or Rejection Rate and Peak Test on page 85. NOTE If the WRO unit is stopped because of alarm 203 CONDUCTIVITY STOP, supervision of product water conductivity is always performed when run is restarted. When the peak test starts, the product water conductivity is measured (C2) and the value is saved by the program as a reference value. The duration of the peak test is for 5 minutes. During this period the product water conductivity must differ more than 5 µS/cm from the reference value measured at the start of the Peak test. The difference can be both positive or negative, either way it proves that the conductivity sensor (C2) is working. 2.6.3.7 Rejection Rate The rejection rate (percent) is the reduction of the conductivity of the water in a RO system. The rejection rate depends on a number of factors, such as conductivity, pH and temperature of the feed water, and may vary significantly from one location to another. The rejection rate should therefore not be considered as an absolute measure of the quality of the water, rather as an indicator that can help to detect

34

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

changes in performance of the WRO unit which may be caused by fouling or degradation of the RO membrane. The rejection rate notification default setting of 90 percent (S149 changeable from GXP software or internal service mode, refer to Rejection Rate and Peak Test on page 86 or Alarm Limits on page 85) is relevant for most inlet water supplies. It may need to be adjusted at installation to a lower value depending on local conditions, especially in cases of low feed water conductivity (<100 µS/cm). The limit should be set at least 5 percent units lower than the initial value at installation. The rejection rate notification will be issued when the WRO unit enters standby if the rejection rate is below the notification limit, for more than 5 consecutive minutes during the run period. The rejection rate is calculated by the formula below: Conductivity in Product water line measured by C2 Rejection rate =  1- ----------------------------------------------------------------------------------------------------------------------------------------  100  Conductivity in Feed water line measured by C1 

2.7 Changing from Run to Standby Mode The stop procedure below is performed when is pressed during run mode until the light goes out and standby displays. Step 1

Bypass valve (BYVA) opens to release the pressure and the reject valve (REVA) is open to drain. The RO pump is on and the inlet valve (INVA) alternates between open and closed. It is open when the water level is between the low level sensor (LL) and the high level sensor (LH) and closed when the water level reaches the LH sensor.

Step 2

The drain flow is increased to remove particles stuck on the feed water side of the membrane. This is to reduce the wear of the membrane and thereby prolong the lifetime of the membrane.

Step 3

After ten seconds the inlet valve (INVA) closes and the tank is emptied until the water level is below the low level sensor.

Step 4

The RO pump stops and the WRO unit enters standby mode.

2.7.1 Start After Power Loss NOTE As soon as a mode is entered, the software will store information, (in the serial E2PROM) to be used if the software has to be restarted because of a power loss. The WRO unit cannot detect if the power loss is caused by the operator turning off the WRO unit with the mains power switch, or if a power failure occurred. The software will always perform a recovery after any

P/N 3027437 Rev. B

35

Technical Description

WRO 300/300 H

power loss (even if the WRO unit was in standby at the time of the power loss). When the power returns after a power loss the recovery function in the WRO unit tries to bring the machine back to the mode it was in, at the time of the power loss. The program in the WRO unit will always start to check if chemicals are present. This is a safety precaution controlled by the setting of the CHEM FLAG. During modes when chemicals are present in the WRO unit the CHEM FLAG status is set to TRUE by the program. If the CHEM FLAG status is TRUE the WRO unit will issue alarm 404 RINSE REQUIRED when the power returns. The operator must initiate RINSE (pressing until steady light goes on). If the CHEM FLAG status is FALSE the software will check the mode at the time of the power loss and return to this mode. If no valid mode information is found the WRO unit will go to standby mode when the power returns. NOTE The start after power loss differentiates between run mode started by the operator (pressing the run button) and a remote run, started on request from the dialysis machine (remote cable connected between the two machines). The WRO unit will start automatically in run mode if the mode was started manually. The WRO unit will start in standby mode if it was a remote run. The dialysis machine will restart the WRO unit in run mode if the dialysis machine is still connected to the WRO unit.

36

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

2.8 Hygiene Functions 2.8.1 Manual Flush The manual flush function is initiated by the operator when the WRO unit is in standby mode. Press

until SELECT displays. Use the

arrow buttons to display MANUAL FLUSH. Press to initiate. This gives a short flush of water in the WRO unit at elevated flow rate. The duration of the elevated flow rate is preset in S223 (changeable from GXP only, refer to GXP — Preset on page 74). The WRO unit then returns to standby mode.

2.8.2 Chemical Disinfection and Cleaning The dialysis machine should be disconnected from the WRO unit before performing chemical disinfection or cleaning (this is not valid for central chemical disinfection, refer to page 43). CAUTION If the WRO unit is still connected to the dialysis machine during the chemical disinfection procedure, the test for residuals must be performed on the dialysis machine according to the dialysis machine operator manual of the when the chemical disinfection procedure is finished. NOTE Chemical disinfection cleaning is indicated by steady light of

.

Chemical disinfection and cleaning consist of three phases; Intake, dwell, and rinse. 401 REMOVE WAND 1. Intake

2. Dwell

3. Rinse

Time

Contact time PERFORM RESIDUAL TEST

Fig.2.16 — Phases during chemical disinfection.

P/N 3027437 Rev. B

37

Technical Description

WRO 300/300 H

2.8.2.1 Intake Phase The optical sensor detects when the disinfection wand is connected to the chemical intake. CHEM SELECT displays and starts to flash. The other end of the disinfection wand should be inserted into an external container with cleaning or disinfection solution. Press the down arrow button to enter a list of selectable protocols.1 Use the arrow buttons to scroll the list. Press until steady light goes on to start the selected protocol for chemical disinfection or cleaning. The preservation protocol (enabled by default) can also be selected from this menu. Refer to Preservation Without Freeze Protection on page 48.

NOTE • The first disinfection protocol that displays when the disinfection wand is connected and the down arrow button is pressed, is defined in S138. It can only be changed from GXP, refer to Disinfection Protocol Manager on page 90. • The protocol defined by S138 will only be shown once (at the start of scrolling through the visible protocols) if the actual protocol is set to invisible. • Ten protocols, with 11 variables each, can be preset. Refer to Disinfection Protocol Manager on page 90. Protocol number 2, 4, 7, 8, and 9 are selectable by default settings (acid clean, Central Chem Phoenix®, MEMSTOR (preservative), Minncare® (disinfect), and Minnclean®). • If protocols for preservation plus freeze, central chemical disinfection or alkaline cleaning are enabled, they are also selectable from the CHEM SELECT menu. The contact time2 is measured from when the Intake phase starts. NOTE When the contact time is reached, rinse is automatically performed (whether the Intake phase and the dwell phase are completed or not) to avoid extended exposure to disinfection chemicals. When the intake phase starts, the CHEM FLAG status is set to TRUE by the program to indicate that chemicals are present in the WRO unit. The CHEM FLAG status will only change to FALSE when rinse has

1. S-numbers where the protocols can be set invisible; S37, S47, S57, S67, S77, S87, S97, S107, S127, changeable from the internal service mode or from GXP. Refer to Protocol Enable on page 68 and Default setting of Disinfection Protocol on page 92. 2. S-number; S40, S50, S60, S70, S80, S90, S100, S110, S120, S130, refer to Disinfection Protocol Manager on page 90. 38

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

been performed and the conductivity reading (C2) is below the notification limit for product water, S33, refer to Alarm Limits on page 85. When the preset intake phase1 has ended, both the RO pump and the chemical intake pump stop and 401 REMOVE WAND displays until the disinfection wand is removed from the chemical intake. Thereafter dwell and then rinse are performed automatically. Refer to Dwell and Rinse on page 44. If the disinfection wand is removed before the preset amount of solution has entered into the WRO unit, flashes medium and the alarm 404 RINSE REQIURED displays. It is possible to restart the Intake phase by inserting the disinfection wand into the intake and then press . The alarm 406 INSUFFICIENT INTAKE will be issued if the preset limit2 is not set to zero and not reached during the Intake phase. Remove the disinfection wand and insert it again to be able to restart the Intake phase. . CAUTION The chemical container must be located below the chemical intake. CAUTION When requested by the WRO unit, remove the disinfection wand from the chemical intake. Failure to remove the disinfection wand can cause siphoning of the chemical solution from the bottle resulting in the tank overflowing chemical solution through the back of the machine. 2.8.2.2 Power Failure If a power failure occurs during chemical disinfection or cleaning the alarm 404 RINSE REQUIRED will be issued when the power returns. When

is pressed until steady light goes on, RINSE is performed.

2.8.2.3 Intake Phase Pause The chemical intake phase can be paused by pressing flashes, (

until

flashes medium during paused Intake).

If the set dwell time is reached before the Intake phase is restarted (measured from start of the Intake phase before the pause), the WRO unit will automatically enter rinse. When paused, the WRO unit stops all flows. The program remembers the amount of chemicals that have so far been added (calculated by the program based on time). 1. S-number; S41, S51, S61, S71, S81, S91, S101, S111, S121, S131, refer to Disinfection Protocol Manager on page 90. 2. S-number; S187, S188, S189, S190, S191, S192, S193, S194, S195, S196, refer to Disinfection Protocol Manager on page 90. P/N 3027437 Rev. B

39

Technical Description Press phase.

WRO 300/300 H again until steady light goes on to continue the Intake

2.8.2.4 Intake Phase Restart Remove the disinfection wand and reinsert it. CHEM INTAKE RESTART displays and flashes. Press until steady light goes on to restart the Intake phase. NOTE When the Intake phase is restarted the calculation for added chemicals is reset, but the contact time is not reset. If the disinfection wand is not reinserted and unit continues to the dwell period.

is pressed the WRO

2.8.2.5 Days Since Last For the operator to view DAYS SINCE LAST (heat disinfection1/chemical disinfection/acid cleaning2/alkaline cleaning) the function has to be enabled in preset3.

1. Only in the WRO 300 H unit 2. Warm Acid cleaning in the WRO 300 H unit 3. S-number; S153, S154, S155, S156, refer to Time Since Last on page 97. 40

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

2.8.2.6 Disinfectant Concentration Calculate the concentration of disinfectant in the WRO unit by using the variables described in the table below and the formula in the following table: Value Description

Unit

Vm

Internal water volume in the WRO unit (3500 ml) + Product water loop 2 x 1 m (100 ml)

ml

Km

The desired concentration of the solution in the WRO unit

%

Kc

The concentration of the disinfectant

%

Vc

Intake volume of the disinfectant

ml

Formula

Result of formula

Km = Kc × (Vc / Vm) Concentration of the solution in the WRO unit Vc = Km × (Vm / Kc) Intake volume of disinfectant

Examples: Calculated Intake volume of Dialox; when Vm = 3500 + 100 ml, Km = 3% and Kc = 100% Vc = 3% × (3600 ml / 100%) = 108 ml Calculated Intake volume of pre diluted chemical; when Vm = 3600 ml, Km = 3% and Kc = 75% Vc = 3% × (3600 ml / 75%) = 144 ml 2.8.2.7 Chemical Disinfection Level Flow block T3 C1

Constant flow valve

Feed water

OFVA INVA Loop

Tank air vent

Spray nozzle

Flow meter

T1

C2

L.H.

Chemical intake pump

Drain Chemical Connector

L.L.

Chemical Intake

Product water

Heater B Tank RO pump

RO module

Constant flow valve

L.E.

Needle valve T2

F

BYVA

REVA

Heater A

Drain outlet

= if level reaches LH in tank and during the end of the Intake phase Drain

Fig.2.17 — Flow overview during chemical disinfection — during the Intake phase.

When chemical disinfection is initiated, the level in the tank is adjusted to a level just above the low level sensor (LL). The RO pump then

P/N 3027437 Rev. B

41

Technical Description

WRO 300/300 H

starts and runs until LL indicates air. The RO pump stops and the inlet valve (INVA) opens. It stays open until LL again senses water. When the disinfectant level in the tank reaches the high level sensor (HL), the reject valve (REVA) opens to drain. The chemical intake pump runs until the preset amount of chemical solution has entered into the tank1. The capacity of the chemical intake pump can be set between 60 and 180 ml/minute (changeable from GXP software only (S151), refer to Chemical Disinfection on page 95). The RO pump circulates the fluid in the flow path during the chemical intake phase. At the end of the Intake phase the bypass valve (BYVA) opens and the reject valve (REVA) is activated to lower the water level in the tank to LL. When the disinfection wand is removed and at least 10 seconds has elapsed since requesting the operator to remove the disinfection wand, the tank is filled up with water to the high level sensor (LH), BYVA closes and REVA is deactivated. The RO pump starts the circulation through the RO module, the chemical intake pump starts the circulation through the chemical intake unit and the return overflow valve (OFVA) opens. The circulation in the flow path will continue for three minutes. The alarm 406 INSUFFICIENT INTAKE is issued if the product water conductivity is below the set intake limit (preset S187S196). The speed of the RO pump is then reduced, BYVA opens and REVA opens to drain. Both valves are deactivated and both pumps stop when the level is below the low level sensor (LL).. NOTE When BYVA is deactivated, the WRO unit is pressurised, allowing for disinfection of the product water loop. CAUTION The chemical container must be located below the chemical intake. CAUTION When requested by the WRO unit, remove the disinfection wand from the chemical intake. Failure to remove the disinfection wand can cause siphoning of the chemical solution from the bottle resulting in the tank overflowing chemical solution through the back of the machine.

1. S-number: S41, S51, S61, S71, S81, S91, S101, S111, S121, S131; refer to default setting in Disinfection Protocol Manager on page 90. 42

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H 2.8.2.8 Central Chemical Disinfection Flow block T3 C1

Constant flow valve

Feed water

OFVA INVA Loop

Tank air vent

Spray nozzle

Flow meter

T1

C2

L.H.

Chemical intake pump

Drain Chemical Connector

L.L.

Chemical Intake

Product water

Heater B Tank RO pump

RO module

Constant flow valve

L.E.

Needle valve T2

F

BYVA

REVA

Heater A

Drain outlet

= depending on the amount of chemical solution used by the dialysis machine

Drain

Fig.2.18 — Flow overview during central chemical disinfection.

The central chemical disinfection process disinfects the WRO unit and distributes disinfectant into the dialysis machine for chemical disinfection of the inlet parts of the dialysis machine. The chemical intake pump starts when the product water conductivity reading is below the set low limit (preset S158). The chemical intake pump runs until the product water conductivity reading reaches the upper limit (preset S157). After that the chemical intake pump alternates between on and off. (Refer to Chemical Disinfection on page 95). The alarm 406 INSUFFICIENT INTAKE will be issued if the product water conductivity reading has not reached the upper limit (preset S157) within five minutes. The overflow valve (OFVA) stays open until the product water conductivity reading reaches the upper limit the first time (preset S157). It then closes to create a pressure in the product water loop and allow for the disinfection solution to enter the dialysis machine. NOTE OFVA stays active (open) until the preset conductivity limit is reached, minimizing the loop pressure and thereby preventing solution with insufficient concentration to enter the dialysis machine. 2.8.2.9 Acid Cleaning (only WRO 300) For a description of the intake phase refer to Chemical Disinfection and Cleaning on page 37). During the intake phase and dwell of acid cleaning, the bypass valve BYVA is open when the RO pump is running. This minimizes the pressure and increases the flow rate over the

P/N 3027437 Rev. B

43

Technical Description

WRO 300/300 H

membrane, thus improving the effectiveness of the cleaning procedure. When the intake phase is completed, 401 REMOVE WAND displays until the disinfection wand is removed. Thereafter dwell and rinse are performed automatically. Refer to Dwell and Rinse on page 44. 2.8.2.10 Warm Acid Cleaning (only WRO 300 H) For a description of the intake phase refer to Intake Phase on page 38). During the intake phase and dwell of warm acid cleaning, the bypass valve BYVA is open when the RO pump is running. This minimizes the pressure and increases the flow rate over the membrane, thus improving the effectiveness of the cleaning procedure. When the intake phase is completed, 401 REMOVE WAND displays until the disinfection wand is removed. Thereafter the heaters (A and B) are activated. The heaters alternate between on and off during the warm acid cleaning procedure, regulated by the program and the temperature of the water. If the preset temperature value is not reached during warm acid clean the alarm 407 INSUFFICIENT TEMPERATURE is activated. 2.8.2.11 Alkaline Cleaning Refer to Acid Cleaning (only WRO 300) on page 43.

2.8.3 Dwell and Rinse After a disinfection or cleaning program, the intake phase will automatically be followed by dwell and rinse. 2.8.3.1 Dwell Phase Flow block T3 C1

Constant flow valve

Feed water

OFVA INVA Loop

Tank air vent

Spray nozzle

Flow meter

T1

C2

L.H.

Chemical intake pump

Drain Chemical Connector

L.L.

Chemical Intake

Product water

Heater B Tank RO pump

RO module

Constant flow valve

L.E.

Needle valve T2

F

BYVA

REVA

Heater A

Drain outlet

Drain

Fig.2.19 — Flow overview during dwell.

44

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

If the intermittent run is enabled in preset1, circulation will be performed in the flow path during dwell. The RO pump will then operate according to the settings for circulation time2 and stop time3. Refer to Default Setting of Disinfection Protocol on page 94. A dwell period can be interrupted at any time by pressing WRO unit then switches to rinse.

. The

NOTE Intermittent run is enabled by default for protocol number; 2, 9, 10 (ACIDCLEAN for WRO 300, WARM ACID CLEAN for WRO 300 H, MINNCLEAN, ALKALICLEAN). 2.8.3.2 Rinse Phase and Residual Test The rinse phase consists of three steps that are repeated for the preset rinse time (refer to Default Setting of Disinfection Protocol on page 94). The three steps are: Step 1

Bypass valve (BYVA) opens and reject valve (REVA) opens to drain. The RO pump starts at low speed. The RO pump stops and the valves close when the level is below low level sensor (LL). Then the inlet valve (INVA) is open until the water reaches the high level sensor (LH). Then this step is repeated seven times.

Step 2

The RO-pump circulates the fluid in the WRO unit for two minutes with return overflow valve (OFVA) open and reject valve (REVA) open to drain followed by five seconds open to tank. The chemical intake pump also runs.

Step 3

The WRO unit stops for one minute.

Step 4

During the final five minutes of the rinse the conductivity value is checked in the product water line (C2). If the value is below the notification limit the rinse will be finished within the preset rinse time. The rinse will be extended until the conductivity goes below the limit or maximum 30 minutes. If the conductivity value is still above the notification limit after 30 minutes the alarm 403 HIGH CONDUCTIVITY RINSE will be displayed.

2.8.3.3 Residual Test After Chemical Disinfection: PERFORM RESIDUAL TEST displays when the rinse phase is comwill remain steady lit and flashes medium. Verify the pleted. absence of chemicals or cleaning solution with approved methods. Refer to the Operator’s Manual for the WRO 300 unit or the WRO 300 H unit. 1. S43, S53, S63, S73, S83, S93, S103, S113, S123, S133, 2. S44, S54, S64, S74, S84, S94, S104, S114, S124, S134 3. S45, S55, S65, S75, S85, S95, S105, S115, S125, S135 P/N 3027437 Rev. B

45

Technical Description

WRO 300/300 H

2.8.3.4 Residual Test After Central Chemical Disinfection: After central chemical disinfection the WRO unit goes to standby, when the rinse phase is completed. There is no request from the WRO unit to perform residual test. This has to be performed on the dialysis machine after the dialysis machine’s rinse, according to the Operator’s Manual of the dialysis machine CAUTION The test for residuals has to be performed on the dialysis machine according to the Operator’s Manual of the dialysis machine.

2.8.4 Preservation If the WRO unit is to be disconnected from the water supply and taken out of service for more than one week, a chemical preservation has to be done. NOTE The preset contact time has no influence during preservation since the intake phase is not followed by dwell (preset S60 and S100 — refer to Disinfection Protocol on page 92). The default value is 0. 2.8.4.1 Preservation with Freeze Protection (glycerol) The intake of the preservation solution is done through the feed water inlet. The WRO unit cannot generate a suction pressure for the feed water inlet — an external positive pressure must be generated. This can be done by placing the canister containing the preservation fluid higher than the WRO unit. The chemical intake is not used since the chemical intake pump cannot provide enough flow when adding glycerol. When the disinfection wand is connected to the chemical intake unit the RO pump stops the circulation if the WRO unit is not already in standby mode. CHEM SELECT displays and

starts to flash. Use

the arrow buttons to select the preservation protocol and press until a steady light goes on. NOTE The disinfection wand is only connected to initiate the CHEM SELECT. The preservation solution enters through the feed water inlet. The intake phase for preservation consists of the three phases below: 1

46

The inlet valve (INVA) is open until the water reaches the high level sensor (LH). The RO pump starts at low speed. Bypass valve (BYVA) opens and reject valve (REVA) opens to drain. The RO pump stops and INVA opens when the level is below the low level

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

sensor (LL). These steps are repeated eleven times and then 401 REMOVE WAND displays. Flow block T3 C1

Constant flow valve

Feed water

OFVA INVA Loop

Tank air vent

Spray nozzle

T1

Flow meter

C2

L.H.

Chemical intake pump

Drain

Product water

Heater B Tank

Chemical Connector

RO module

RO pump

L.L.

Constant flow valve

L.E.

Chemical Intake

Needle valve T2

F

REVA

BYVA Heater A

Drain outlet

Fig.2.20 — Flow overview phase 1, preservation Drain

2

When the disinfection wand is disconnected, the RO pump circulates the fluid in the WRO unit for five minutes with BYVA open, return overflow valve (OFVA) open and REVA open to tank. The chemical intake pump also runs.

Flow block T3 C1

Constant flow valve

Feed water

OFVA INVA Loop

Tank air vent

Spray nozzle

Flow meter

T1

C2

L.H.

Chemical intake pump

Drain Chemical Connector

L.L.

Chemical Intake

Product water

Heater B Tank RO pump

RO module

Constant flow valve

L.E.

Needle valve T2

F

BYVA

REVA

Heater A

Drain outlet

Fig.2.21 — Flow overview phase 2, preservation Drain

3

P/N 3027437 Rev. B

When the circulation is completed, BYVA is still open and REVA opens to drain until the level in the tank is below Low level sensor (LL).

47

Technical Description

WRO 300/300 H

When the preservation procedure is completed, the alarm 404 RINSE REQUIRED displays, the buzzer sounds, and flashes. Switch off power to the WRO unit using the mains power switch. 2.8.4.2 Preservation Without Freeze Protection The intake phase is identical to the intake phase for the chemical disinfection and cleaning. Refer to Intake Phase on page 38. When the preservation procedure is completed the alarm 404 RINSE REQUIRED is issued and displayed. Buzzer sounds, and flashes. Switch off the WRO unit with the mains power switch. 2.8.4.3 Rinse After Preservation Turn on the WRO unit with the mains power switch. 404 RINSE REQUIRED displays, and flashes. Press until light goes on to initiate rinse. Refer to Rinse Phase and Residual Test on page 45.

2.8.5 Heat Disinfection (only WRO 300 H) If the WRO 300 H unit will not be used for an extended period of time, heat disinfection, either manually initiated or set by time channels, will maintain the microbiological quality of the product water. The dialysis machine must not consume water during heat disinfection, since this would issue 304 INCORRECT WATER LEVEL in the WRO 300 H unit. 2.8.5.1 Initiate Heat Disinfection When the WRO 300 H unit is in standby mode, press until light starts to flash and SELECT displays. Select the heat disinfection program HEAT with the arrow buttons and press until steady light goes on. The heat disinfection procedure can also be initiated by time channels, refer to Time Channels on page 55. If the water level in the tank is not above the low level sensor (LL) within a time period specified by the program, the alarm 302 INSUFFICIENT WATER SUPPLY is issued. 2.8.5.2 Function Check When the operator has initiated heat disinfection, the program performs the function checks described in this section. If the checks complete successfully, the WRO 300 H starts heating up the water. First there is a function check of temperature measurement. The temperature sensor amplifiers are checked for range and offset errors. The temperature sensors are checked for short or open circuit. Refer to : N INTERNAL ERROR on page 126; 103:10 (T1), 103:11 (T2) and 103:15 (T1), 103:16 (T2) and 103:17 (T3). Then there is a function check of over heat protection. The heater control and flow supervision circuits are checked to ensure that there is water flow through the heater before the heater rod is turned on. Nor-

48

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

mal test time is about one minute. If stable flow cannot be reached within five minutes an alarm is issued. Initiation of any procedure (heat disinfection or low flow heat) in the WRO 300 H using the heater rods starts with functional tests to verify proper function of the following components (refer to Internal Error : N INTERNAL ERROR on page 126): •

Temperature sensors



Flow switch and sensor including the corresponding safety relay



The control relays

2.8.5.3 Temperature Sensor Test Step 1 The sensors are checked for disconnection. The output from the sensor measuring circuit indicates high temperature if the sensor is disconnected. The software checks that the measured temperature is lower than 105 ºC. If not, internal error 103:15, 103:16 or 103:17 is issued, dependent of which sensor, and the selected procedure (HEAT or LFH) is stopped. Step 2

The sensors are checked for short circuit. The output from the sensor measuring circuit will indicate low temperature if the sensor is short circuited. The software checks that the signal input is higher than 3 ºC. If not, internal error 103:15, 103:16 or 103:17 is issued and the selected procedure is stopped.

Step 3

The electronic circuits on the CPU board are checked. The software checks that the reading through the A/D-system is able to measure temperatures up to 95 ºC. This is done by replacing the temperature sensor with a fixed resistor in the measuring circuit. If the measured temperature is lower than the limit, the internal error 103:10 or 103:11 is issued. The test is only performed on the two sensors used for temperature feedback in the control loop. The alarm blocks the procedure.

2.8.5.4 Flow Switch and Sensor Test Step 1 A flow is generated by the RO-pump through the two heater rods. The status signals from both flow switch and flow sensor are then observed. The status shall indicate a continuous flow for 20 seconds. The observation period is 5 minutes. The internal error 103:8 is issued if any of the two sensor signals are not stable for 20 seconds. The alarm blocks the procedure. Step 2

P/N 3027437 Rev. B

Verification that the mains supply is not connected to the heaters when no flow is present. Otherwise, alarm 103:9 is issued and the procedure is blocked.

49

Technical Description

WRO 300/300 H

Step 3

The control relays are switched on. The software verifies the presence of mains supply at the heater rods. If not, alarm 103:19 is issued and the procedure is blocked.

Step 4

The RO pump is stopped. The software then verifies that the heater rods are disconnected from the mains supply. If not alarm 103:7 is issued. Also, alarm 103:6 is issued if the flow switch or the flow sensor still indicates flow. Both alarms stop the selected procedure.

NOTE The over heat protection function has higher priority than the software. This is a safety precaution so that the WRO 300 H unit will never be able to turn the heater rods on if the water flow is insufficient. 2.8.5.5 Heat Disinfection Procedure The RO pump starts with the bypass and return overflow valves (BYVA, OFVA) open to reduce the pressure in the system. The pressure must not exceed 3 bar, according to membrane specification, when the water temperature is above 45 °C. Heater A in the reject water line is activated. Heater B in the product water line is activated after a short while when the product water flow is above 200 ml/min. The chemical intake pump circulates the hot water in the chemical intake unit. The default set temperature in reject and product water lines is 92 ºC. Refer to Heat Set Temperature on page 88. The heating set temperature for the product water loop can be boosted. The preset S30 can be increased if the return temperature is not achieved. The software checks that correct temperature is reached at two different positions in the flow path. The first check verifies that the reject water temperature has reached the heater A set temperature. The second check verifies that the return temperature has reached the product water loop return temperature defined by the preset S225, refer to Heat Set Temperature on page 88. The heat disinfection temperature is achieved if both checks are satisfactory. The alarm INTERNAL ERROR 103:21 is issued if the temperatures are still below the limits when the heat disinfection has been in progress for 60 minutes.

50

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

Flow block T3 C1

Constant flow valve

Feed water

OFVA INVA Loop

Tank air vent

Spray nozzle

T1

Flow meter

C2

L.H.

Product water

Heater B

Chemical intake pump

Drain

Tank

Chemical Connector

RO pump

L.L.

RO module

Constant flow valve

L.E.

Chemical Intake

Needle valve T2

F

REVA

BYVA Heater A

Drain outlet

= low flow

Drain

Fig.2.22 — Flow during start of Heat disinfection

During the heat disinfection the water level in the tank rises with increased temperature. If it reaches the high level sensor (LH), the reject valve (REVA) will open to drain for a few seconds to lower the level in the tank. The product water flow increases with increased temperature of the water (up to approximate one liter/minute in the product water loop). During heat disinfection there must be no water consumption from the dialysis machine. If the water level in the tank goes below the low level sensor (LL) the alarm 304 INCORRECT WATER LEVEL is issued. Flow block T3 C1

Constant flow valve

Feed water

OFVA INVA Loop

Tank air vent

Spray nozzle

Flow meter

T1

C2

L.H.

Chemical intake pump

Drain Chemical Connector

L.L.

RO pump

RO module

Constant flow valve

L.E.

Chemical Intake

Product water

Heater B Tank

Needle valve T2

F

BYVA

REVA

Heater A

Drain outlet

= low flow Drain

Fig.2.23 — Flow during heat disinfection P/N 3027437 Rev. B

51

Technical Description

WRO 300/300 H

If a disinfection wand is connected to the chemical intake during heat disinfection, the alarm 401 REMOVE WAND will be issued and the chemical intake pump will stop. The heat disinfection process will continue. The chemical intake pump will start again when the wand is removed. 2.8.5.6 Active Cool Down The default preset is to run active cool down until the temperature is below 40 ºC. The WRO 300 H unit will then enter standby mode. Without active cool down the internal water temperature in the WRO 300 H unit will remain elevated for several hours. Three different actions trigger active cool down (if preset to run active cool down, S142): •

Heat disinfection hold time has expired



Heating interrupted by operator



Power failure during heating

During active cool down the RO pump circulates the water and the reject valve (REVA) opens to drain for three seconds. Then the inlet valve (INVA) opens and remains open until the water reaches the high level sensor (LH). After 20 seconds the temperature is checked. This procedure is then repeated until the temperature is below 40 ºC. The WRO 300 H unit then goes to standby mode. 2.8.5.7 Cool Down If active cool down is disabled in the preset, the WRO 300 H unit goes to standby after termination of heat disinfection. 2.8.5.8 Stop During Heat Disinfection To stop the heat disinfection press until light goes on. An active cool down is then performed, if enabled. When the active cool down is finished the WRO unit goes to standby mode. If active cool down is disabled in the preset, the WRO 300 H unit goes directly to standby mode. 2.8.5.9 Power Failure If a power failure occurs during heat disinfection, alarm 301 INSUFFICIENT HEAT displays when the power returns. The button must be pressed. An active cool down is then started if enabled in the preset, otherwise standby is entered.

52

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

2.9 Features — Extra Functions 2.9.1 Water Save Function The drain flow from the WRO unit is approximately 1.3 l/min when the WRO unit is in run mode. In situations where water is scarce or expensive, the water save function can be used in order to reduce the water consumption. The function is enabled in preset S184 (changeable from Internal service mode, refer to Sub menus for ACTIVATE FUNCTIONS on page 70 or GXP Software, refer to Water Save on page 84). The water save function uses the three-way reject valve (REVA) to recirculate part of the reject water flow back to the inlet tank. The water save factor (equals the part of the time that the water is recirculated) is preset in S29, and is only changeable from GXP Software, refer to Water Save on page 84. The cycle time is 20 seconds. As an example, a preset of 5 percent gives one second (= 0.05 × 20 seconds) flow to tank and 19 seconds (= 0.95 × 20 seconds) to drain. The water save function is disabled during the initial two minutes of run mode. NOTE • The water save function will not affect the flow conditions in the WRO unit, only the amount of water diverted to drain. • The conductivity of the module feed water will increase with higher water save factor setting, which, in turn, will increase the product water conductivity. CAUTION Increasing the water save factor may affect the life expectancy and performance of the RO module.

P/N 3027437 Rev. B

53

Technical Description

WRO 300/300 H

The table below shows the recovery ratios (that is, the percentage of the feed water that is converted to product water) for the WRO unit that will be obtained at different water save factors and at different dialysis fluid flow rates. Dialysis fluid flow rate Water save factor

Drain flow

Water saved

0.3 l/min

0.5 l/min

0.7 l/min

%

l/min

l/min

During 5 h operation, liter

Total water consumption liter

Recovery ratio,%

Total water consumption liter

Recov ery ratio, %

Total water consumption liter

Reco very ratio, %

0

1.3

-

-

480

19

540

28

600

35

10

1.17

0.13

39

441

20

501

30

561

37

20

1.04

0.26

78

402

22

462

33

522

40

30

0.91

0.39

117

363

25

423

35

483

43

40

0.78

0.52

156

324

28

384

39

444

47

50

0.65

0.65

195

285

32

345

43

405

52

60

0.52

0.78

234

246

37

306

49

366

57

70

0.39

0.91

273

207

43

267

56

327

64

80

0.26

1.04

312

168

54

228

66

288

73

Example: At 40% water save, the amount of water to drain will be reduced to 0.78 l/min. During a 5-hour treatment this corresponds to 156 liters less water used (0.52 l/min × 60 min × 5). CAUTION The shaded area in the table represents a recovery ratio above 50%. This area should only be entered if softened, non-fouling feed water is used.

2.9.2 Reminders This function reminds the user about recurrent actions, (that is, change prefilter or perform acid cleaning). Five reminders may be active at the same time. When a time period for a reminder has passed and standby is entered, the buzzer sounds, flashes and the reminder text displays.

54

P/N 3027437 Rev. B

Technical Description

WRO 300/300 H

The time period is set from internal service mode, refer to Sub Menus for Reminders on page 62, while the text (of maximum 28 characters) is set from GXP, refer to Reminders on page 99. NOTE • The reminder will appear once for each time period. • The time period is automatically reset when the reminder has occurred. • Because of a limit of 14 characters in GXP, the text string for every recurrent notification is divided into two presets values.

2.9.3 Time Channels Preset time for automatic start of heat disinfection and run is activated by time channels. When the WRO unit is in standby mode it will indicate automatic start of heat disinfection by slow flash of matic start of run by slow flash of be indicated by slow flash of

and auto-

. The auto flush function will also

.

Heat disinfection and run can be initiated automatically at a preset time through the time channels. A slow flash of or (in standby) will indicate that either of these functions have been selected. NOTE Auto flush is also indicated by a slow flash of

.

Three different actions can be programmed in time channels (refer to presets for Time Channels on page 98). •

Automatic start of heat disinfection; the WRO 300 H unit must be in standby mode. If heat disinfection is not started when preset in a time channel, alarm 303 OVERDUE HEAT displays when entering standby.



Automatic start of run; the WRO unit must be in standby mode.



Automatic stop of run mode.

Time channels can be activated or changed either through internal service or by using GXP, refer to Time Channels on page 55 or Time Channels on page 98. NOTE Preset of time channels should be performed in internal service mode. The time channels presets may be copied from one WRO unit to another using GXP software.

P/N 3027437 Rev. B

55

Technical Description

WRO 300/300 H

This page is blank.

56

P/N 3027437 Rev. B

Replacements

WRO 300/300 H

3 Replacements 3.1 Replacement Matrix After replacing components, MCP recommends performing the different actions in the table below in a specific order to verify the function of the WRO unit. The order of actions is set by numbers for each component in the matrix below.

2

1

Set time and date (4.2.2.3)

2

Conductivity adjustment (6.5)

2

Temperature check

3

1

4

1

3

Load preset file (4.3.3)

5

Start RUN Perform disinfection

1

1

1

6

2

7

Check Operator’s panel (6.6)

8

Flow/pressure adjustment (6.4)

1

1

1

Check rejection rate (2.6.3.7)

2

2

5

Pre-adjust module pressure to 5 bar (6.4) Heat disinfection (2.8.5)

Check cooling fan (2.4.5)

P/N 3027437 Rev. B

2

2

1

1

3

2

2

2

4

3

1

2

1 6

Preservation rinse (2.8.4.3) Verify water save (2.9.1)

Flow meter

2

Check/load program (4.3.5)

Flow indicator

Heater rod

2

CPU Board

ELT-test (7.2)

AC/DC

1

Fan

1

RO module

1

Needle valve

AC-relay board

Operator’s panel

Level sensor/switch

RO membrane (WRO 300 H)

RO membrane (WRO 300)

Conductivity cell

Temperature sensor

Flow block complete

Chemical intake unit

Chemical intake pump

PET-test (7.1)

RO pump head Actions to be performed (The numbers in parentheses refer to sections in this manual)

RO pump motor

Component

2

9

3

3

1

1

1 4 1

3

10

57

Replacements

WRO 300/300 H

This page is blank.

58

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H

4 Internal Service 4.1 Changing Configuration Parameters The internal configuration parameters used by the WRO unit during operation can be changed in three different ways: •

From internal service mode, see below.



New program version downloaded. Refer to GWD - Download on page 75.



From GXP. Refer to GXP — Preset on page 74 and Presets and Defaults on page 79. NOTE • Some changes are possible both from the internal service mode and from GXP. Refer to GXP — Preset on page 74. • Some changes can only be done from the internal service mode and other changes can only be done by the use of GXP.

4.2 Internal Service Mode The operator panel is used to make changes in the internal service mode. The panel function is changed according to the table below. Button

Function

Description in Internal Service

OK

Press to confirm/select the displayed menu.

CANCEL

Press to cancel and leave the displayed menu. In some sub menus the previous sub menu displays. In other sub menus the internal service list displays. Press to change a value.

up or down arrow buttons

The service code gives access to the internal service mode. Service code

16

90

00

4.2.1 Enter Internal Service Mode Step 1

Use the arrow buttons to go up or down in the standard list.

Step 2

When INTERNAL SERVICE displays, press both arrow buttons at the same time. Either release both buttons simultaneously or keep them pressed until (1) ENTER SERVICE CODE displays.

Step 3

When(1) ENTER SERVICE CODE displays, use the arrow buttons to change the value to 16 and then press

P/N 3027437 Rev. B

.

59

Internal Service

WRO 300/300 H Step 4

When (2) ENTER SERVICE CODE displays, use the arrow buttons to change the value to 90 and then press

Step 5

When(3) ENTER SERVICE CODE displays, use the arrow buttons to change the value to 00 and then press

Step 6

.

.

The INTERNAL SERVICE list is entered.

NOTE In internal service, the symbol

is visible.

4.2.2 Internal Service Loop Use the arrow buttons to scroll the internal service list, containing the 14 menus in the table below: 1

SET REAL TIME

2

TIME CHANNELS

3

REMINDERS

4

CLEAR CHEM FLAG

5

SELECT LANGUAGE

6

CALIBRATE COND

7

SAFE MEM.

8

DEFAULT PRESETS

9

INIT DAYS SINCE LAST

10

PROTOCOL ENABLE

11

LOGGING

12

COND. ALARM LIMITS

13

ACTIVATE FUNCTIONS

14

REMOTE SIGNAL TEST

4.2.2.1 Exit Internal Service Press

to leave the internal service list.

NOTE Remember to turn off and on the WRO unit with the mains power switch to ensure changes are correctly used by the program.

60

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H

4.2.2.2 Internal Service List Sub Menus The sub menus are presented in this section, (one table for each menu in the internal service list). NOTE When the character / is used in this description, the sub menu can display either the text before or the text after /. 4.2.2.3 Set Real Time When SET REAL TIME displays press time.

to enter the list of set real

Sub menus for

SET REAL TIME

Information

SET YEAR

Use the arrow buttons to change the value displayed in the rectangle for each sub menu. Confirm the displayed value by pressing

X SET MONTH

X

, and the next sub menu is displays.

SET DAY

Whenever

X

REAL TIME

SET HOUR

list is displays.

is pressed once SET in the internal service

X SET MINUTE

X WEEKDAY

XXXDAY

WEEKDAY is displays, based on the values set in the sub menus above, to confirm the selected data.

4.2.2.4 Time Channels When TIME CHANNELS displays press to enter the list of set time channels. (for description of functionality refer to Time Channels on page 55, also changeable from GXP, refer to Time Channels on page 98). Sub menus for TIME CHANNELS X1. WEEKDAY HH:MM INACTIVE / STANDBY / RUN / HEAT

Use the arrow buttons to scroll the list of set time channels (maximum 21).

SET WEEKDAY XXXDAY

Use the arrow buttons to change the

SET HOUR HH:MM SET MINUTE HH:MM

P/N 3027437 Rev. B

Information

Press , and the first sub menu (for the selected time channel) displays.

value. Confirm by pressing the next sub menu displays.

, and

Whenever is pressed once the list of set time channels displays.

61

Internal Service

WRO 300/300 H

Sub menus for TIME CHANNELS

Information

SET TYPE INACTIVE / STANDBY / RUN / HEAT

Use the arrow buttons to change the type. Confirm by pressing

. SAV-

ING displays and followed by SET WEEKDAY (the first sub menu for the time channel). Press to return to the list of set time channels.

1. X represents a number (1-21).

4.2.2.5 Reminders When REMINDERS displays, press to enter the list of set reminders. (Refer to Time Channels on page 55 for description of functionality.) Sub Menus for Reminders

Information

REMINDERX INACTIVE / Y Z DAYS

Use the arrow buttons to scroll the reminder list. If the reminder is active; Y displays the time period and Z displays the remaining days until the reminder will be issued. Press to display the first sub menu (for the selected reminder).

SET DAYS INACTIVE / Y Z DAYS

To be able to activate (set the time period) or disable the reminder, press the next sub menu.

to enter

If the reminder already has a time period (Y) and one of the arrow buttons is used,

RESET displays. Choose a or b below: 1

Press and return to the reminder list, remaining days (Z) is not reset.

2

Press and remaining days (Z) is reset (to same value as Y).

Note If INACTIVE displays and the arrow buttons are used, RESET displays. Press list.

62

to return to the reminder

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H

Sub Menus for Reminders

Information

SET DAYS INACTIVE / Y DAYS

If INACTIVE displays use the arrow buttons to change to Y

DAYS. Y DAYS displays use the arrow buttons to change the time period Y (1-730 If

days). Confirm by pressing , and SAVING displays. If a time period was saved RESET displays. Choose a or b below: and return to the reminder a. Press list without resetting remaining days (Z). b. Press and the set value for remaining days (Z) is reset (to same value as Y). In both cases the reminder list displays. Inactivate a reminder by selecting INAC-

TIVE and press . SAVING displays followed by the reminder list. NOTE The text for a reminder is set from GXP. Refer to Reminders on page 99. 4.2.2.6 Clear CHEM FLAG When CLEAR CHEM FLAG displays in the internal service list, press to enter the sub menu where the status can be changed. CAUTION When the CHEM FLAG is manually set to FALSE the technician is responsible for no chemicals being present in the WRO unit before operation (run mode). Only change the CHEM FLAG TO FALSE in the following situations:

P/N 3027437 Rev. B



To exclude the forced rinse, when the functionality of the chemical intake has been tested using water instead of chemicals during the Intake phase for the chosen disinfection cleaning mode.



If the CHEM FLAG=TRUE displays because of a corrupt check sum in the program.



If exchanging the CPU board.

63

Internal Service

WRO 300/300 H

Sub menus for

CLEAR CHEM FLAG

Information

CHEM. FLAG

Use the arrow buttons to change between TRUE and FALSE. Confirm

TRUE

/

FALSE

. SAVING displays, followed by CLEAR CHEM FLAG

by pressing

in the internal service list.

NOTE The CHEM FLAG can only be manually changed from internal service mode. 4.2.2.7 Select Language When SELECT LANGUAGE displays in the internal service list press to enter the list where display text language is changed. Displayed text language in internal service is always English Sub menus for

SELECT LANGUAGE

Information

LANGUAGE

Use the arrow buttons to scroll the list of language versions of the display texts. Press

to choose the displayed

language. SAVING displays, followed by the sub menu below. VIEW CHOSEN LANGUAGE TXT?

Press and a list with all display texts for the language version displays. Use the arrow buttons to scroll the list. Press to return to the list of language selection.

NOTE The language can also be changed from GXP (S36). Refer to User Interface Panel (LCD) on page 87.

64

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H 4.2.2.8 Calibrate Cond When CALIBRATE COND displays in the internal service list press to adjust the conductivity sensors C1 and C2.

NOTE Only use COEFF. to adjust the conductivity sensors; for both the feed water FW (C1) and the product water PW (C2). Always set OFFSET to zero for both conductivity sensors. Sub menus for

CALIBRATE COND

Information

FW

Use the arrow buttons to move the rectangular marker to FW (feed water) or

PW

PW

(product water). Press enter the sub menu.

FW OFFSET / PW OFFSET

Naaa Tbbb

X

to

N

is the non-temperature-compensated conductivity reading.

T

is the temperature-compensated conductivity reading. Use the arrow buttons to increase or decrease the value (X); so the conductivity value, displayed for the operator in operational data, will change with X µS from the value measured by the conductivity sensor. Confirm by pressing , SAVING displays followed by the next sub menu. Press menu.

FW COEFF. / PW COEFF.

Naaa Tbbb

Y

to return to the first sub

N

is the non-temperature-compensated conductivity reading.

T

is the temperature-compensated conductivity reading. Use the arrow buttons to increase or decrease the value (Y). A higher coefficient will result in a lower conductivity value and vice versa. The coefficient is used by the program to recalculate the conductivity value displayed for the operator in operational data. Confirm by pressing , SAVING displays followed by the next sub menu. Press menu.

P/N 3027437 Rev. B

to return to the first sub

65

Internal Service

WRO 300/300 H

4.2.2.9 Safe Memory Area When SAFE MEM. displays in the internal service list press to enter the sub menu where all values in the safe memory area can be set to default values by choosing TRUE. Sub menus for

SAFE MEM.

Information

INIT SAFE MEM.

Use the arrow buttons to move the rectangular marker from FALSE to TRUE.

FALSE

TRUE

Press to confirm, SAVING displays and all values in the safe memory area are set to default values. Thereafter SAFE MEM. in the internal service list displays.

The safe memory area includes the information below: CAUTION Information will be lost when INIT SAFE MEM. is done. Important data must be recorded manually. It is not possible to reenter the data into the WRO unit.

66

Safe Memory Area

Default Values

Additional Information

LASTACID

0

Counter for days since last acid cleaning

LASTALK

0

Counter for days since last alkaline cleaning.

LASTHEAT

0

Counter for days since last heat disinfection.

LASTCHEM

0

Counter for days since last chemical disinfection.

ROPUMP

0

Counter for run time in hours. The run time displays in the operational data list as machine RUN TIME:

VISUALSTATEMODE

E_COLD_START

Clear the recovery area and set the recovery memory to standby

CONDPULSSTOPTIME

0

The last time when there was water flow is saved by the program, used for the peak test.

LASTUSEDCHEMPROT

0

0 = CHEMICAL disinfection (such as Dialox

CHEMFLAG

1

or Minncare)

= TRUE (gives forced rinse)

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H

4.2.2.10 Default Presets When DEFAULT PRESETS displays in the internal service list press to enter the sub menu where all values in the preset area can be set to default values by choosing TRUE. Sub menus for

DEFAULT PRESETS

Information

DEFAULT PRESETS

Use the arrow buttons to move the rectangular marker from FALSE to

FALSE

TRUE

TRUE. Press to confirm, SAVING displays and all values in the preset area are set to default values. Thereafter DEFAULT PRESETS in the internal service list displays.

Refer to section Presets and Defaults on page 79 for default values. CAUTION Information will be lost when DEFAULT PRESETS is done. Important data must be recorded manually. 4.2.2.11 Init Days Since Last When INIT DAYS SINCE LAST displays in the internal service list, press to reach the sub menu where all counters for TIME SINCE LAST (heat disinfection, chemical disinfection, acid cleaning and alkaline cleaning) can be set to zero. Sub menus for

INIT DAYS SINCE LAST

Information

INIT TIME SINCE LAST

Use the arrow buttons to move the rectangular marker from FALSE to

FALSE

TRUE

TRUE. Press to confirm, SAVING displays and the counters are reset (thereafter still in this menu). Press to return to the internal service list.

NOTE Disable or enable display of DAYS SINCE LAST in S153–156, refer to Time Since Last on page 97.

P/N 3027437 Rev. B

67

Internal Service

WRO 300/300 H

4.2.2.12 Protocol Enable When PROTOCOL ENABLE displays in the internal service list press to reach the sub menus where the visibility of disinfection protocols (for the operator) are set. NOTE The protocols are in a list and the only way to see the following protocols is to confirm the protocol displayed (TRUE or FALSE). Confirm all protocols to reach the last one. Sub menus for

PROTOCOL ENABLE

Information

1. _______1

Use the arrow buttons to move the rectangular marker from FALSE to

FALSE

TRUE

TRUE. Press to confirm, and SAVING displays, followed by the sub menu for the next disinfection protocol. Whenever

is pressed one time

PROTOCOL ENABLE

in the inter-

nal service list displays. 1. 10 protocols can be set, ______ is the first by default

NOTE • The first disinfection protocol to display when the disinfection wand is connected and the down arrow button is pressed, is defined in S138. Refer to First Protocol on page 90. • Protocol’s are also changeable from GXP. Refer to Default Setting of Disinfection Protocol on page 94. 4.2.2.13 Logging When LOGGING displays in the internal service list press to reach the sub menus. The menus only provide information; values cannot be changed. Press and the next sub menu displays. Press from a sub menu to return to the internal service list and LOGGING displays.

68

Sub menus for LOGGING

Information

RETURN TEMP. X °C

Temperature measured by T3. The reading is only valid in a WRO 300 H unit. (116 indicates that no temperature sensor is connected.)

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H Sub menus for LOGGING

Information

SENSOR & VALVES ELH IW:WWA 10

ELH = Empty low high level sensors in the tank. The 3 characters after the colon give information about what the 3 sensors currently detect, A for air and

W for water. I

represents the inlet valve (INVA). The first figure is the current state of INVA, where 1 is enabled/open/water to tank

and 0 is disabled/closed

W

represents Water save (controlled by the reject valve REVA). The second figure is the current state of REVA, where 1 is enabled/open to drain and

0 is disabled/open to tank. NOTE In the given example: Empty and low level sensor detects water and High level sensor detects air. INVA is open and REVA is inactive. Both INVA and REVA give water to PUMP SPEED 0 RPM

Measured RO pump speed.

REJECT TEMP X °C

Temperature measured by T2. The reading is only valid in a WRO 300 H unit. (116 indicates that no temperature sensor is connected.)

4.2.2.14 Cond. Alarm Limits When COND. ALARM LIMITS displays in the internal service list, press to reach sub menus, to change the limits for the different conductivity alarms; notification, alarm, stop and rejection rate. Sub menus for

COND. ALARM LIMITS

Information

COND. NOTIFICATION LIMIT X ΜS/CM

Use the arrow buttons to change the value (X) for each limit.

COND. ALARM LIMIT X ΜS/CM

Confirm by pressing

COND. STOP LIMIT X ΜS/CM COND. REJECTION RATE LIMIT X%

P/N 3027437 Rev. B

, SAV-

ING displays followed by the next sub menu. Whenever

is pressed once

COND. ALARM LIMITS

in

the internal service list displays.

69

Internal Service

WRO 300/300 H NOTE The limits are also changeable from GXP, presets S33, S34, S35 and S149. Refer to Alarm Limits on page 85 and Rejection Rate and Peak Test on page 86.

4.2.2.15 Activate Functions When ACTIVATE FUNCTIONS displays in the internal service list press

to display the list of functions. Use the arrow buttons to

scroll the list. Press to enter the sub menu where the function can be enabled or disabled. (Also refer to Features — Extra Functions on page 53). Sub menus for

ACTIVATE FUNCTIONS

Information

WATER SAVE

Move the rectangular marker to select ENABLED to DISABLED. Confirm

ENABLED DISABLED PEAK TEST

ENABLED DISABLED

by pressing , and SAVING displays followed by the list of functions. Press

to return to the internal ser-

AUTO FLUSH

vice list and ACTIVATE

ENABLED DISABLED

TIONS displays.

FUNC-

NOTE The functions are also possible to activate from GXP; presets S184, S186 and S185. Refer to Water Save on page 84, Rejection Rate and Peak Test on page 86 and Auto Flush on page 97. 4.2.2.16 Remote Signal Test NOTE The REMOTE SIGNAL TEST with REMOTE TEST ENABLED is only to be used by manufacturing for final testing of Port500 (green1). 1. Blue in older version

When REMOTE SIGNAL TEST displays in the internal service list, press

to reach the sub menu REMOTE TEST ENABLED. Press

to return to the internal service list and REMOTE SIGNAL TEST displays.

70

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H

4.3 PC Support Software 4.3.1 USB Serial Driver Installation NOTE The WRO 300/300 H requires USB drivers. NOTE This installation instruction is applicable for Windows 2000 and Windows XP. NOTE This software along with GXP/GXL/GWD have only tested through Windows XP. Newer versions of Windows (Vista, Windows 7) are not yet supported. NOTE Do not insert the USB cable before installing the drivers! Install the USB to COM Driver (W405050) on a PC as follows.

P/N 3027437 Rev. B

Step 1

Unzip W405050.zip to the desktop. Double click the W405050.bat file found in the extracted W405050 directory — this will install the driver.

Step 2

Connect the USB cable from the WRO 300/300 H to an available USB port.

Step 3

Windows will detect new hardware.

Step 4

On the Found New Hardware Wizard dialog box, click No, not this time and click Next.

71

Internal Service

WRO 300/300 H Step 5

Click Install from a list or specific location (Advanced) and click Next

Step 6

Click Search for the best driver in these locations, select Include the location in the search check box, click Browse, and select GAMBRO_WRO300_Installer (located in the extracted directory (Typically W405050\GAMBRO_WRO300_ INSTALLER). Click Next.

Step 7

72

Windows installs the driver.

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H Step 8

If the window below displays, click Continue Anyway.

Step 9

On the Completing the Found New Hardware Wizard dialog box, click Finish.

Step 10 On the dialog box shown below, click Finish.

P/N 3027437 Rev. B

73

Internal Service

WRO 300/300 H Step 11 Windows displays the message Found New Hardware.

Step 12 The Device Manager window displays with the COM port visible. The COM port number assigned will vary — the WRO software only recognizes ports 1–6. Please check what your installation resulted in.

Step 13 Repeat the installation for the next USB port on the computer if more ports are needed.

4.3.2 GXL — Logging Logging of parameters like conductivity, flow, temp etc. is possible to do during operation by the use of GXL. For detailed information of the GXL software refer to the GXL Operator’s Manual.

4.3.3 GXP — Preset Preset values can be changed with the Gambro® service tool, GXP. The GXP runs on an ordinary PC communicating with the WRO unit through an USB interface. The technician starts the GXP session by: Step 1

74

Put the WRO unit into standby mode.

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H Step 2

Connect the WRO unit to the computer through the USB interface.

Step 3

Choose Online in the GXP software and enter the access code (169000). EXTERNAL PRESET displays on the WRO unit when the WRO unit enters the preset mode.

Step 4

Make changes from the GXP software and execute by choosing WRITE.

Step 5

Verify that all changes are accepted by the WRO unit and that no other parameters are changed.

Step 6

Turn the power off and on the WRO unit using the mains power switch to enter standby mode again. This will force the WRO unit to restart and all preset parameters will be re-read.

For detailed information of the GXP software refer to the GXP Operator’s Manual. Descriptions of presets refer to Presets and Defaults on page 79.

4.3.4 Checksum Status Press the button and at the same time switch on the WRO unit using the mains power switch. The display shows four checksums. Main

Display

1: aaaa1

1: bbbb2

2: cccc3

2: dddd4

1. 2. 3. 4.

Main CPU board application code checksum Display board application code checksum. Main CPU board boot loader code checksum Display board boot loader code checksum

Verify the values with the program documentation.

4.3.5 GWD - Download NOTE Requires GWD version 2. GWD is a tool to upgrade the software in a WRO 300/300 H using a connected PC.

4.3.6 Start the GWD Step 1

P/N 3027437 Rev. B

Press the button and at the same time turn on power to the WRO unit using the mains power switch. Verify that the WRO unit enters boot mode (blank display).

75

Internal Service

WRO 300/300 H Step 2

On the desktop, double click the GWD icon to start the program and display the GWD window.

4.3.6.1 Menus

Menus

Description

File

Re-scan COM Ports GWD will update the list of COM ports.

Help

Exit

Ends the GWD program.

About GWD...

Displays data about the program.

4.3.6.2 Download a New Program Step 1 On the GWD window, click in the COM Port list and select the appropriate COM port.

76

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H Step 2

If the cable to the WRO 300/300 H is not connected when GWD is started, connect the cable and update the list with COM ports. To update the list point to File and click Re-scan COM Ports.

Step 3

Click the COM Port list and select the software file by clicking , a browse window opens.

Step 4

P/N 3027437 Rev. B

Select the upgrade file and click Open. The file will always have the file extension .gwd. The path shows in the File to Flash box.

77

Internal Service

78

WRO 300/300 H Step 5

On the GWD window, Click Download.

Step 6

The program will proceed with the download, displaying the status.

Step 7

When the download finishes, the program calculates a checksum (CRC) to verify that the software has been downloaded correctly.

Step 8

The result of the verification is shown.

Step 9

When ready, close the program and restart the WRO unit.

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H

4.4 Presets and Defaults Preset values in the non volatile memory are used to configure the behavior of the WRO unit. The presets can be changed by the use of GXP. Refer to GXP — Preset on page 74 for instructions to start the GXP session. NOTE • Manufacturing setup of the preset may be different from the default values presented in this chapter. • Some preset values are also changeable from the Internal service mode. Refer to Internal Service Mode on page 59. When changing preset values using the GXP software, the two tables below assist in finding the section where the preset is described. The first table is sorted in alphabetical order of preset groups. The second table is sorted in numerical order of S-numbers. Group

Number of presets within this group

CHEM

3

Chemical Intake Pump Capacity on page 95

COND

5

Alarm Limits on page 85

Refer to

Rejection Rate and Peak Test on page 86 DISPROTMANAGER

110

First Protocol on page 90

1

Default Setting of Disinfection Protocol on page 94

1

Manual Flush on page 96

EXTERNAL RELAY

1

External relay on page 101

HEATING

8

Heat Set Temperature on page 88 Active Cooldown on page 89 Low Flow Heat on page 89 WRO 300 Flow Kit Installed on page 90

LCD

P/N 3027437 Rev. B

3

User Interface Panel (LCD) on page 87

79

Internal Service

WRO 300/300 H

Group

Number of presets within this group

REMINDERS

10

Reminders on page 99

REMOTE

2

Remote on page 100

RO PUMP

2

RO Pump on page 83

TANK CONTROL

2

Tank Control on page 83

TIME MANAGER

8

Auto Flush on page 97

Refer to

Time Since Last on page 97

80

TIME CHANNEL

21

Time Channels on page 98

WATER SAVE

2

Water Save on page 84

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H

INDEX: S-Numbers

P/N 3027437 Rev. B

S28, page 83

S70, page 94

S112, page 94

S154, page 97

S197, page 94

S29, page 84

S71, page 94

S113, page 94

S155, page 97

S198, page 94

S30, page 88

S72, page 94

S114, page 94

S156, page 97

S199, page 94

S31, page 88

S73, page 94

S115, page 94

S157, page 95

S200, page 94

S32, page 88

S74, page 94

-

S158, page 95

S201, page 94

S33, page 85

S75, page 94

S117, page 94

S159, page 98

S202, page 94

S34, page 85

-

S118, page 94

S160, page 98

S203, page 94

S35, page 85

S77, page 94

S119, page 94

S161, page 98

S204, page 94

S36, page 87

S78, page 94

S120, page 94

S162, page 98

S205, page 94

S37, page 94

S79, page 94

S121, page 94

S163, page 98

S206, page 94

S38, page 94

S80, page 94

S122, page 94

S164, page 98

S207, page 90

S39, page 94

S81, page 94

S123, page 94

S165, page 98

S208, page 100

S40, page 94

S82, page 94

S124, page 94

-

S209, page 98

S41, page 94

S83, page 94

S125, page 94

-

S210, page 98

S42, page 94

S84, page 94

-

-

S211, page 98

S43, page 94

S85, page 94

S127, page 94

-

S212, page 98

S44, page 94

-

S128, page 94

S171, page 99

S213, page 98

S45, page 94

S87, page 94

S129, page 94

S172, page 99

S214, page 98

-

S88, page 94

S130, page 94

S173, page 99

S215, page 98

S47, page 94

S89, page 94

S131, page 94

S174, page 99

S216, page 98

S48, page 94

S90, page 94

S132, page 94

S175, page 99

S217, page 98

S49, page 94

S91, page 94

S133, page 94

S176, page 99

S218, page 98

S50, page 94

S92, page 94

S134, page 94

S177, page 99

S219, page 98

S51, page 94

S93, page 94

S135, page 94

S178, page 99

S220, page 98

S52, page 94

S94, page 94

-

S179, page 99

S221, page 98

S53, page 94

S95, page 94

-

S180, page 99

S222, page 98

S54, page 94

-

S138, page 90

S181, page 89

S223, page 96

S55, page 94

S97, page 94

S139, page 97

S182, page 100

S224, page 83

-

S98, page 94

S140, page 97

S183, page 89

S225, page 88

S57, page 94

S99, page 94

S141, NOT USED 1 S184, page 84

S226, page 100

S58, page 94

S100, page 94

S142, page 89

S185, page 97

S227, page 83

S59, page 94

S101, page 94

S143, page 87

S186, page 86

S228, -

S60, page 94

S102, page 94

S144, page 87

S187, page 94

S229, -

S61, page 94

S103, page 94

-

S188, page 94

S230, -

S62, page 94

S104, page 94

-

S189, page 94

S231, -

S63, page 94

S105, page 94

-

S190, page 94

S232, -

S64, page 94

-

-

S191, page 94

S233, page 83

S65, page 94

S107, page 94

S149, page 86

S192, page 94

S234, page 100

-

S108, page 94

-

S193, page 94

S235, page 95

81

Internal Service

WRO 300/300 H

INDEX: S-Numbers S67, page 94

S109, page 94

S151, page 95

S194, page 94

S68, page 94

S110, page 94

-

S195, page 94

S69, page 94

S111, page 94

S153, page 97

S196, page 94

1. Time channels replaces preset S141

NOTE Preset S228–S232 are prepared for remote start/stop of chemical disinfection from the dialysis machine. The remote start-stop feature is currently not used in any U.S. dialysis machines.

4.4.1 Change Presets for WRO 300 H The WRO unit makes a default preset if any of the alarms 103:1-4 are issued. (Refer to Alarms on page 125). Then the default presets are fetched from the flash memory containing the software and restored in the non volatile memory. Any presets adjusted for the clinic are lost.

Flash

Default presets

Non volatile memory

Presets

Fig.4.1 — Data from flash memory to non volatile memory.

The WRO 300 H setup reverts to WRO 300 basic settings. Values in the table below must be preset in a WRO 300 H unit for the machine to function as a WRO 300 H unit. Default Parameter Value

82

Value for the WRO 300 H Unit

Refer to

S28

35

40

RO Pump on page 83

S32

2

1 (220 - 240 VAC) 2 (115 VAC) 3 (100 VAC)

Heat Supply Voltage on page 88 !CAUTION Correct mains voltage must be set in order to prevent malfunction of heat disinfection and low flow heat.

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H

Default Parameter Value S49

Protocol number 2

S48

Value for the WRO 300 H Unit

8

8 WARMACID

WARM ACID

WARM CITRIC

Refer to Default Setting of Disinfection Protocol on page 94

4.4.2 RO Pump Group: RO Pump Parameter

Settings

Name

Run speed

Low product flow notification limit.

S No.

S28

S224

Description

Output duty cycle for RO pump during (run) operation.

If the product water flow is below the preset limit the notification 206 LOW PRODUCT FLOW is issued when entering standby mode.

Scale

1%

1 ml / minute

Default

35/40 (Cold/Hot)

0

Low Limit

0

0

High Limit

46

1000

4.4.3 Tank Control Group: Tank control

P/N 3027437 Rev. B

Parameter

Settings

Name

INLET VALVE MAX OPEN TIME

High sensor test on/off

S No.

S233

S227

Description

The time for Inlet valve (INVA) to be maximum open

Activates or deactivates the High level sensor test (LH) in the tank. This preset must only be changed if the Low level and High level sensors (position LL and LH) in the tank are exchanged from optical level sensors to float level switches. For detailed description refer to separate Spare Parts instruction.

83

Internal Service

WRO 300/300 H

Group: Tank control Parameter

Settings

Scale

0 = Timer off 1 - 600 (seconds)

0 = MECHANICAL 1 = OPTICAL

Default

60

0

Low Limit

0

0

High Limit

600

1

NOTE • In WRO units manufactured with program version 3.2 or earlier, all three level sensors are optical sensors. • In WRO units manufactured with program version 4.0 or later, only the empty level (LE) sensor is optical and the sensors for low level (LL) and high level (LH) are float level switches. • The preset S227 is only to be changed if the level sensors are to be replaced. Both the sensor for low level (LL) and high level (LH) must be changed on the same occasion and the software in the WRO unit must be program version 4.0 or later.

4.4.4 Water Save Group: Water Save Parameter Settings Name

Water save factor

Water save enable/disable

S No.

S29

S184

Description

Preset value for the time that the reject water is redirected back to the tank in order to reduce water consumption, during run.

Enables or disables the water save function, during run.

Scale

1% of time period where total time period is 20 seconds

0 = DISABLED 1 = ENABLED

Default

5

1

Low Limit

0

0

High Limit

80

1

NOTE S184 is changeable from internal service mode.

84

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H 4.4.5 Conductivity

The conductivity monitoring uses three limits: notification, alarm and stop, allowing for individual adaptation of alarm settings to local preferences and regulations. NOTE • For the operator to get an early warning of change in the product water conductivity; preset the notification limit to a value between the normal product water reading and the preset alarm limit. • To stop operation in case of a conductivity alarm, preset the alarm and the stop limits at the same value. • If, in case of a conductivity alarm, it is desired to allow for continued dialysis treatment in order to finish the ongoing dialysis treatment; preset the stop limit to a higher value than the preset alarm limit. 4.4.5.1 Alarm Limits Group: Cond Parameter

P/N 3027437 Rev. B

Settings

Name

Notification Limit

Alarm Limit

Stop Limit

S No.

S33

S34

S35

Description

201 CONDUCTIVITY NOTIFICATION is issued when entering standby if the product water conductivity has exceeded the notification limit for more than 30 consecutive seconds during run. This notification limit is also used as a reference, during the last 5 minutes of a rinse cycle, to verify that the product water conductivity is below the notification limit. If not, the rinse is prolonged with a maximum of 30 minutes. If the conductivity reading is still not below preset notification limit within the 30 minutes the alarm 403 HIGH CONDUCTIVITY RINSE is issued.

202 CONDUCTIVITY ALARM is issued during operation (run) if the product water conductivity has exceeded the preset alarm limit for more than 30 consecutive seconds during run. The WRO unit continues in run to allow for finishing the dialysis treatment.

203 CONDUCTIVITY STOP is issued and the WRO unit stops if the product water conductivity has exceeded the preset limit for more than 30 consecutive seconds during operation (run).

85

Internal Service

WRO 300/300 H

Group: Cond Parameter

Settings

Scale

1 µS/cm

1 µS/cm

1 µS/cm

Default

20

30

60

Low Limit

0

0

0

High Limit

500

500

500

NOTE • S33, S34, S35 are changeable from internal service mode. • Factory settings of limits for notification, alarm and stop are all preset to 60 µS/cm. With these preset limits the WRO 300 unit will stop without any previous warning if the product water conductivity exceeds 60 µS/cm for more than 30 seconds (since the priority of the actions are in the order of stop, alarm and notification). • If the feed water conductivity is known to vary significantly, the conductivity notification limit can be inactivated by setting it at the same value as the conductivity alarm. 4.4.5.2 Rejection Rate and Peak Test Group: Cond Parameter

Settings

Name

REJECTION_RATE_LIMIT

Cond Peak test enable/disable

S No.

S149

S186

Description

Rejection ratio notification limit. The notification 205 LOW REJECTION RATE will be issued when the WRO unit enters standby if the rejection rate is below the set limit for more than 5 consecutive minutes during the previous run period.

Enable or disable the peak test

Scale

1%

0 = DISABLED 1 = ENABLED

Default

90

1

Low Limit

0

0

High Limit

98

1

NOTE S149 and S186 are changeable from internal service mode. Refer to Cond. Alarm Limits on page 69 and Activate Functions on page 70.

86

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H 4.4.6 User Interface Panel (LCD) Group: LCD Parameter

Settings

Name

Language

Backlight Timeout

Loop Timeout

S Number.

S36

S143

S144

Description

Language for the texts displayed for the operator.

LCD backlight time out.

LCD list time out until the display reverts back to show mode.

Scale

0 = ENG (English) 1 = SWE (Swedish) 2 = GER (German) 3 = FRE (French) 4 = ITA (Italian) 5 = SPA (Spanish) 6 = DK (Danish) 7 = FI (Finnish) 8 = NL (Netherlands) 9 = PT (Portuguese) 10 = TR (Turkish) 11 = NR (Norwegian) 12 = CZE (Czech) 13 = PL (Polish) 14 = ET (Estonian) 15 = SK (Slovak) 16 = SL (Slovene) 17 = LV (Latvian) 18 = LT (Lithuanian)

-1 = no backlight 0 = backlight only when button pressed 1 - 60 = seconds

1 - 60 = seconds

Default

0

15

15

Low Limit

0

-1

1

High Limit

18

60

60

NOTE S36 is changeable from internal service mode. Refer to Select Language on page 64.

4.4.7 Heat The heaters consists of three windings and to obtain correct power a specific combination of those has to be activated. Different combinations are required depending on which power supply voltage is used.

P/N 3027437 Rev. B

87

Internal Service

WRO 300/300 H

4.4.7.1 Heat Supply Voltage Group: Heating Parameter

Settings

Name

Supply voltage

S No.

S32

Preset group

Heating

Description

Mains supply voltage for the WRO unit’s heater function.

Scale

0 = no heater function available 1 = 220 - 240 V AC 2 = 115 V AC 3 = 100 V AC

Default

0 (2 for WRO H)

Low Limit

0

High Limit

3

4.4.7.2 Heat Set Temperature Group: Heating Parameter Settings

88

Name

Product Temp

Reject Temp

Return Temp Limit

S No.

S30

S31

S225

Description

Preset for the set temperature of heater B, measured by temperature sensor (T1) in the product water line.

Preset for the set temperature of heater A, measured by temperature sensor (T2) in the reject water line.

Preset for the temperature limit to be reached in the return overflow water line during heat, measured by temperature sensor (T3). The alarm INTERNAL ERROR (103:21) will be issued if the return temperature limit is not reached.

Scale

0.01 °C

0.01 °C

0.01 °C

Default

9200

9200

8000

Low Limit

0

0

0

High Limit

9500

9500

9500

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H 4.4.7.3 Active Cooldown Group: Heating Parameter Settings Name

Active cool down

S No.

S142

Preset group Heating Description

Enable Active cooldown

Scale

0 = DISABLED 1 = ENABLED

Default

1

Low Limit

0

High Limit

1

4.4.7.4 Low Flow Heat Group: Heating Parameter

Settings

Name

Low flow heat temp

LFH auto HEAT

S No.

S181

S183

Preset group

Heating

Heating

Description

Set temperature of heater B in low flow heat mode

Preset = TRUE automatically starts heat disinfection after a remote low flow heat initiated by the dialysis machine. The preset has no effect on low flow heat mode started from the SELECT menu in the WRO 300 H unit.

Scale

0.01 °C

0 = FALSE 1 = TRUE

Default

8300

1

Low Limit

0

0

High Limit

8500

1

NOTE The WRO 300 H has a feature called low flow heat that is used in conjunction with certain dialysis machines. This feature is not approved in the US by the FDA or currently compatible with any U.S. dialysis machines.

P/N 3027437 Rev. B

89

Internal Service

WRO 300/300 H

4.4.7.5 WRO 300 Flow Kit Installed NOTE • This preset must only be changed if a flow meter kit is installed in a WRO 300 unit. • For installation of the flow meter kit refer to separate spare parts instruction. Group: Heating Parameter Settings Name

CHC_FLOW_KIT_INSTALLED

S No.

S207

Description

This preset must only be set to TRUE if a flow kit has been installed in a WRO 300 unit. Then the product water flow displays for operator and the notification for low product flow notification limit can be issued (refer to S224 RO Pump on page 83). The preset has no function in the WRO 300 H unit.

Scale

0 = FALSE 1 = TRUE

Default

0

Low Limit

0

High Limit

1

4.4.8 Disinfection Protocol Manager The technician can preset up to ten different disinfection, cleaning, and preservation protocols for the WRO unit. All parameters included in the setup for each protocol is changeable through the GXP program. The internal service mode can also be used to change the parameter indicating if a particular protocol is to be visible (selectable) during the chemical select procedure. Refer to Protocol Enable on page 68. 4.4.8.1 First Protocol Group: DisProtManager Parameter Settings

90

Name

Default protocol

S No.

S138

Description

First protocol displayed in chemical select mode

Scale

1–10 (= Protocol number, refer to Default tion Protocol on page 94)

Default

8 (= MINNCARE, refer to Default tocol on page 94)

Setting of Disinfec-

Setting of Disinfection Pro-

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H

Group: DisProtManager Parameter Settings Low Limit

1

High Limit

10

NOTE • The first protocol to display when the disinfection wand is connected and the down arrow button is pressed, is defined in S1381. • The protocol defined by S138 will be shown whether the actual protocol is visible or invisible.· • The protocol defined by S138 will only be shown once (at the start of scrolling through the visible protocols) if the actual protocol is set to invisible2. 1. Only changeable from GXP 2. S37, S47, S57, S67, S77, S87, S97, S107, S127, changeable from the internal service mode or from GXP refer to Protocol Enable on page 68 and Default Setting of Disinfection Protocol on page 94.

P/N 3027437 Rev. B

91

Internal Service

WRO 300/300 H

4.4.8.2 Disinfection Protocol The protocol parameters are described in table below. All S-numbers and default values for the protocols are presented on page 94. Group: DisProtManager

LIMIT

Name 1

Scale

Further Description

PROTX_VISIBLE

1 = visible 0 = invisible

0 Preset if the disinfection protocol is going to be selectable (displayed for the operator during chemical select mode) or not displayed.

PROTX_TYPE

Preset type of protocol. 0 = CHEM DIS (Chemical disinfection) 1 = CENTR CH (Central Chemical disinfection) 2 = PRES+FREEZE (Preservation + Freeze) 3 = ACID (Acid cleaning) NOTE 4 = ALKALI (Alkaline Do not use protocol cleaning) type 5 (Membrane (5 = MEM FLUSH (Memflush). brane flush)) 6 = PRESERV (Preservation) 7 = REMOTE CENTR CH (Remote Central Chemical disinfection) 8 = WARM ACID CLEAN (Warm Acid cleaning)

0

8

PROTX_TITLE

Text string

Protocol name, displayed during chemical select mode.

-

-

PROTX_CONT_TIME

1 minute

0 Contact time, calculated from the start of the Chemical disinfection. Refer to page 95.

3000

PROX_CH_VL

1 ml

During the Intake phase of Chemical disinfection, Cleaning or Preservation, the program calculates the time for the Intake period, from the preset value for volume (ml).

0

2500

NOTE If Central Chemical disinfection the scale is minutes.

92

Low

High 1

PROTX_RINSE_TIME

1 minute

Rinse time

6

1000

PROTX_INT_MIT_RU N_MODE

1 = TRUE 0 = FALSE

Preset if the WRO unit is going to intermittently circulate the fluids during the Dwell period or not.

0

1

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H

Group: DisProtManager

LIMIT

Name 1

Scale

Further Description

Low

High

PROTX_INT_MIT_RU N_TIME

1 minute

The time for the RO pump to be on, if PROTX_INT_MIT_RUN_ MODE is set to TRUE.

0

1000

PROTX_INT_MIT_ST OP_TIME

1 minute

The time, for the RO pump to be off, if PROTX_INT_MIT_RUN_ MODE is set to TRUE.

0

1000

CDM_PROTX_MIN_I NTAKE_COND_LIM

µS/cm

The alarm 406 INSUFFI- 0 CIENT INTAKE is issued at the end of the Intake phase, if the conductivity check indicates that no chemicals have been consumed. Set to zero will disable the Intake phase conductivity check.

1000

NOTE The limit is not used during Central Chemical disinfection. CDM_PROTX_TEMP

1 Co

Preset for the set tempera- 0 ture of Heater B, measured by temperature sensor (T1) in the product water line. Only valid if the protocol type is set to WARM ACID CLEAN (8)

4500

1. X in the Name represents a number (1-10) = protocol No.

P/N 3027437 Rev. B

93

Internal Service

WRO 300/300 H

4.4.8.3 Default Setting of Disinfection Protocol Protocol No. 1

Name PROTX_VISIBLE

4

5

6

7

8 Cold

8 Hot

9

10

S107

S107

S117

S127

S47

S47

S57

S67

S77

S87

S97

0

0

S78

S88

S98

S68

Invisible

S58

Visible

S48

1

Invisible

S48

Visible

S38

Visible

0

Invisible

Invisible

1

Invisible

Visible

1

Visible

Visible

0

1

1

0

1

0

S108

S108

S118

S128 ALKALI

ACID

CHEM DIS

CHEM DIS

PRESERV

ACID

CENTR CH

CENTR CH

PRES FREEZE

ACID WARM

ACID

0

3

8

2

1

1

3

6

0

0

3

4

S39

S49

S49

S59

S69

S79

S89

S99

S109

S109

S119

S129

______

ACIDCLEAN

WARM CITRIC

PRESERV+FREEZE

CENTR_CH_PHX

CENTR_CH_200

CENTR_CH_200U

MEMSTOR

MINNCARE

MINNCARE

MINNCLEAN

ALKALICLEAN

S40

S50

S50

S60

S70

S80

S90

S100

S110

S110

S120

S130

30

30

30

0

30

30

30

0

30

30

30

30

S41

S51

S51

S61

S71

S81

S91

S101

S111

S111

S121

S131

115

250

250

0

10

13

1100

2100

50

50

200

250

S42

S52

S52

S62

S72

S82

S92

S102

S112

S112

S122

S132

60

30

30

60

60

60

30

60

60

60

30

30

PROTX_INT_MIT_RU N_MODE

S43

S53

S53

S63

S73

S83

S93

S103

S113

S113

S123

S133

0

1

1

0

0

0

1

0

0

0

1

1

PROTX_INT_MIT_RU N_TIME

S44

S54

S54

S64

S74

S84

S94

S104

S114

S114

S124

S134

2

5

5

0

0

0

5

0

0

0

5

5

PROTX_INT_MIT_ST OP_TIME

S45

S55

S55

S65

S75

S85

S95

S105

S115

S115

S125

S135

10

5

5

0

0

0

5

0

0

0

5

5

CDM_PROTX_MIN_ INTAKE_COND_LIM

S187

S191

S192

S193

S194

S194

S195

S196

0

0

100

280

280

0

0

CDM_PROTX_TEMP

S197

S198 S198 S199 S200

S201

S202

S203

S204

S204

S205

S206

3500

3500

3500

3500

3500

3500

3500

3500

3500

PROTX_CONT_TIME

PROX_CH_VL

PROTX_RINSE_TIME

94

3

S37

CHEM DIS

PROTX_TITLE

2 Hot

Invisible

PROTX_TYPE

2 Cold

250

S188 S188 S189 S190 0

0

3500

0

3500

0

3500

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H 4.4.9 Chemical Disinfection 4.4.9.1 Chemical Intake Pump Capacity Group: Chem Parameter Settings Name

PUMP_CONSTANT_WATER

S No.

S151

Description

The value represents the pump capacity in terms of volume per second.

Scale

1/10 ml/second

Default

15

Low Limit

10

High Limit

100

4.4.9.2 Central Chemical Disinfection Limit Group: Chem Parameter Settings Name

Central chem upper limit

Central chem lower limit

S No.

S157

S158

Description

The chemical intake pump stops when the conductivity value of the product water reaches the set limit.

The chemical intake pump starts when conductivity value of the product water goes below the set limit.

Scale

1 µS/cm

1 µS/cm

Default

250

250

Low Limit

1

1

High Limit

1000

1000

4.4.9.3 Chemical Pump Motor Type Group: Chem

P/N 3027437 Rev. B

Parameter

Settings

Name

CCP_CHEM_PUMP_MOTOR_TYPE

S No.

S235

Description

The chemical pump motor type that is being used.

Scale

0 = AC 1 = DC

Default

0

95

Internal Service

WRO 300/300 H

Group: Chem Parameter

Settings

Low Limit

0

High Limit

1

4.4.9.4 Manual Flush Group: DisProtManager Parameter Settings Name

CDM_MANUAL_FLUSH_TIME

S No.

S223

Description

The duration of manual flush mode.

Scale

1 minutes

Default

5

Low Limit

1

High Limit

1000

NOTE Manual flush is initiated manually by the operator from the SELECT menu, when the WRO unit is in standby mode.

96

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H 4.4.10 Time Manager 4.4.10.1 Auto Flush Group: Time manager Parameter Settings Autoflush standby time

Autoflush run-time

Name

Standby flush enable/disable

S No.

S139

S140

S 185

Description

Time in standby before an Auto flush starts

Duration of an Auto flush period

Enables or disables the Auto flush functionality

Scale

1 minutes

1 minutes

0 = DISABLED 1 = ENABLED

Default

240

5

1

LOW LIMIT

0

1

0

HIGH LIMIT

10000

100

1

NOTE S185 is also changeable from internal service mode (refer to Activate Functions on page 70) This preset enables or disables S139 and S140. 4.4.10.2 Time Since Last Group: Time manager Parameter Settings Name

Time since last heat visible

Time since last chem visible

Time since last acid visible

Time since last alk. visible

S No.

S153

S154

S155

S156

Description

When preset visible, days since last heat disinfection1 displays (HEAT).

When preset visible, days since last chemical disinfection displays (CHEM). Protocol type 0, 1 or 7, refer to

When preset visible, days since last acid cleaning2 displays (ACID CLEAN). Protocol type 3 or 8 refer to

Disinfection Protocol on page 92.

Disinfection Protocol on page 92.

When preset visible, days since last alkaline cleaning displays (ALKALINE CLEAN). Protocol type 4 refer to Disin-

1 = Visible 0 = Invisible

1 = Visible 0 = Invisible

Scale

P/N 3027437 Rev. B

1 = Visible 0 = Invisible

fection Protocol on page 92. 1 = Visible 0 = Invisible

97

Internal Service

WRO 300/300 H

Group: Time manager Parameter Settings Default

0 (1 if WRO 300H)

1

1

0

Low Limit

0

0

0

0

High Limit

1

1

1

1

1. Only in the WRO 300 H unit 2. Warm Acid cleaning in the WRO 300 H unit

NOTE Days since last heat disinfection, chemical disinfection, acid cleaning, or alkaline cleaning displays in operational data. Refer to the Operator’s Manual. NOTE Setting S153 to visible in a WRO 300 unit will enable the TIME SINCE LAST HEAT message in the information list. However, the value has no meaning to the operator.

4.4.11 Time Channels Group: Time channel Parameter

Settings

Name

Time channel Program X1

S No.

S159–S165 S209–S222

Description

Preset time for automatic start of Heat disinfection or run, or automatic stop of run mode.

Scale

HH:MMWT HH = HOUR MM = MINUTE W= day of week (0 = Monday, 1 = Tuesday..., 7 = Sunday) T= Type (0 = No Type (inactive), 1 = Heat disinfection, 2 = RUN, 3 = STANDBY)

Default

00:0010 The default preset value above means that no time channel is enabled because the last number (representing type) is set to 0=NOTYPE.

98

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H

Group: Time channel Parameter

Settings

Further Explanation

Examples: 08:0021 means that 08:00 o’clock on Wednesday a Heat disinfection will automatically be started. 00:3512 means that 00:35 o’clock on Tuesday run will automatically be started. 10:5073 means that 10:50 o’clock on Sunday the WRO unit will automatically go to standby.

1. X represents a number (1-21) = Program number

NOTE Preset of time channels is recommended to be done in internal service mode. The presets (S159 to S165 and S209 to S222) can thereafter be copied from one WRO unit to another using GXP software.

4.4.12 Reminders A text string of maximum 28 characters can be set for each reminder. Due to the limit of 14 characters in the GXP program the text string for every recurring notification is divided on two presets. NOTE The time period is set from internal service mode, refer to Sub Menus for Reminders on page 62. Group: Reminders Parameter

Settings

Scale

Text string of 14 characters

1

Name

Reminders_1

Reminders_12

S No.

S171

S172

Default

REPLACE

CARBON FILTER

Name

Reminders_2

Reminders_22

S No.

S173

S174

Default

DISINFECTION

REQUIRED

Name

Reminders_3

Reminders_32

S No.

S175

S176

Default

ACIDCLEAN

MEMBRANES

2

3

P/N 3027437 Rev. B

99

Internal Service

WRO 300/300 H

Group: Reminders Parameter

Settings

4

Name

Reminders_4

Reminders_42

S No.

S177

S178

Default

REMI

NDER4

Name

Reminders_5

Reminders_52

S No.

S179

S180

Default

REMI

NDER5

5

4.4.13 Remote Group: Remote Parameter Settings Name

WRO 300 - AK protocol

CRC_RUN_SIGNAL_ INVERSED_POLARITY

Enable/disable remote chem dis stop

S No.

S182

S208

S234

Description

Setting of serial or Preset to change the parallel communica- polarization of REMOTE START from the dialysis tion machine. This preset is only functioning if the S182 is set to parallel

Enables the possibility to remote stop of Chemical disinfection.

Scale

0 = PARALLEL 1 = SERIAL

0 = False; A closing of the current circuit will force the WRO unit to go to standby if in run. 1 = True; No current through the current circuit will force the WRO unit to go to run if in standby.

0=DISABLED 1=ENABLED

Default

0

0

0

Low Limit

0

0

0

High Limit

1

1

1

NOTE It is recommended not to change the preset S208 and S234.

100

P/N 3027437 Rev. B

Internal Service

WRO 300/300 H 4.4.14 External relay Group: External Relay Parameter

Settings

Name

External buzzer relay on/off

S No.

S226

Description

If enabled (TRUE), it is possible to use the external alarm output to control opening and closing of the external tap water valve. Makes it possible to activate run by Time channels and at the same time control the external tap.

Scale

0 = FALSE 1 = TRUE

Default

1

Low Limit

0

High Limit

1

The external water valve can be connected to connector P502. The output from the WRO unit is controlled by a relay. All three connection points (common, normally closed and normally open) are directly connected to the external connector P502. The maximum external voltage connected to the relay is 24 VDC and the maximum current is 100 mA. E xternal alarm relay C om m on

P in 7

P5 0 2 8

2 N orm ally closed

P in 6

N orm ally open

P in 5

3

C onnector view

P/N 3027437 Rev. B

101

Internal Service

WRO 300/300 H

This page is blank.

102

P/N 3027437 Rev. B

Wiring Diagram

WRO 300/300 H

5 Wiring Diagram 5.1 WRO 300 H Mains

Mains

Power supply

Fan control

24 V DC

24 V DC P10 RO-pump Motor

P4

P9

Cooling fan

P3

Green P500 Ext. Com. Black P501 board P503

P6 P12

Yellow P502 Microcomputer board

Product water temperature Return water temperature Reject water temperature Feed water conductivity Product water conductivity

Chemical intake pump

Tank level sensor - High

P1

Tank level sensor - Low Tank level sensor - Empty Inlet valve Overflow valve

Operator’s Panel

P1

P8

Reject valve P11

Bypass valve Chemical wand sensor Flow Sensor Ground Flow Sensor Output Flow Sensor Supply

P606 AC Relay P603 board

Product heater rod

P604 P601 P602

Reject heater rod

Flow indicator

Fig.5.1 — Wiring diagram for the WRO 300 H unit

P/N 3027437 Rev. B

103

Wiring Diagram

WRO 300/300 H

5.2 WRO 300 Mains

Mains (not used in WRO 300)

Power supply

Fan control

24 V DC

24 V DC P10 RO-pump Motor

P4

P9

P3

Green P500 Ext. Com. Black P501 board P503

Cooling fan

P6 P12

Yellow P502 Microcomputer board

Product water temperature Return water temperature, not connected Reject water temperature, not connected Feed water conductivity Product water conductivity

Chemical intake pump

Tank level sensor - High

P1

Tank level sensor - Low Tank level sensor - Empty Inlet valve Overflow valve

Operator’s Panel

P1

P8

Reject valve P11

Bypass valve Chemical wand sensor Flow Sensor Ground, not connected Flow Sensor Output, not connected Flow Sensor Supply, not connected

Fig.5.2 — Wiring diagram for the WRO 300 unit

104

P/N 3027437 Rev. B

Maintenance

WRO 300/300 H

6 Maintenance 6.1 Water Testing Certain tests of the water are required to insure proper function of the WRO unit. The testing frequency depends on system setup and local conditions and regulations. The following tests are recommended.

6.1.1 Total Chlorine WARNING This device does not remove chlorine and chloramines from the water. Carbon filtration to remove these substances is therefore required if the total chlorine concentration might exceed 0.1 mg/ liter (ppm). Severe patient injury may otherwise occur. Ensure by testing or by other means that the total chlorine concentration is below 0.1 mg/l (ppm) prior to initiating dialysis treatment. Test kit example: SteriChek Chlorine Sensitive, MCP order number 3027108.

6.1.2 Residual Hardness If a softener is installed before the WRO unit, a test for residual hardness should be performed by the user on a regular basis to verify the performance of the softener. Refer to the operator's manual for the softener. Example of test kit: SteriChek Sensitive Low-Range Water Hardness, MCP order number WT821973.

6.1.3 Performance Tests Chemical and microbiological tests of the product water for the WRO unit must be performed on a regular basis. Scope, methodology and frequency should be in accordance with local rules and regulations.

6.2 Changing Prefilter Cartridges 6.2.1 General The prefiltration equipment to the WRO unit may vary in type, number and size depending on local conditions and feed water quality. Filtration to remove particles 5 micron and larger is always required. Carbon filtration must also be applied if the water contains or may contain chlorine or chloramines at any time but is also recommended as a general precaution in all installations. Filtration through two carbon filters in series is recommended. Carbon block filters contain a carbon matrix that acts as a filtration medium itself and is therefore a good alternative as a combination fil-

P/N 3027437 Rev. B

105

Maintenance

WRO 300/300 H ter. Different sizes and filtration rates are available to fit different requirements.

6.2.2 Replacing Carbon Block Filters 6.2.2.1 Frequency The cartridge should be exchanged before the total chlorine concentration exceeds0.1 mg/l. Proactive replacement on a regular basis should be done to avoid an excessive pressure drop over the filter. 6.2.2.2 Filter Change Procedure Step 1 Turn off the water supply. Step 2

Relieve any pressure in the prefilter housing.

Step 3

Unscrew the prefilter housing and remove the old cartridge.

Step 4

Clean the inner surface of the housing.

Step 5

Insert a new cartridge and reinstall the housing.

Step 6

Turn on the water supply and verify that there are no leaks.

6.3 Power Supply Unit 6.3.1 Air Filter The air filter in the power supply unit protects it from dust. It has to be replaced on a regular basis to insure sufficient air flow through the unit. The filter should be exchanged at least annually. More frequent replacement may be required depending on environmental conditions.

6.3.2 Protective Earth (PE) Verify the protective earth connection (earth ground) after service work and at regular intervals.

6.4 Adjusting Product Water Flow 6.4.1 Using Adjustment Tool 3027493

Fig.6.1 — Adjustment Tool 3027493

106

P/N 3027437 Rev. B

Maintenance

WRO 300/300 H This tool will automatically result in a correct product water flow (1.1 – 1.2 l/min) when the loop pressure is set at 1.5 bar. Step 1

Mount a pressure gauge in the quick connector on the RO module.

Step 2

Connect the service tool to the Y-coupling on the loop of a WRO 300 or WRO 300 H.

Step 3

Connect a hose to the outlet of the tool and lead it to drain.

Step 4

Start the WRO in Run.

Step 5

Wait until the water temperature has stabilized.

Step 6

Adjust the loop pressure with the internal needle valve1 in the WRO until a stable pressure of 1.5 bar is obtained.

Step 7

Stop the WRO and disconnect the tool from the Y-coupling.

Step 8

Check the reject pressure at the pressure gauge on the RO module. The pressure should be below 13 bar. Otherwise, the membrane may need cleaning or be replaced.

1) Refer to Needle Valve on page 27.

P/N 3027437 Rev. B

107

Maintenance

WRO 300/300 H

6.4.2 Using Adjustment Tool WT100TEST Step 1

Attach a pressure gauge to the quick connector on the RO module.

Step 2

Attach another pressure gauge and an adjustable valve after the Y coupling on the product water loop. Pressure gauge

Y coupling Product water loop Adjustable valve

Step 3

Start the WRO unit and let it run until the water temperature has stabilized.

Step 4

Adjust the external adjustable valve until the pressure in the product water loop is 1.5 bar.

Step 5

Measure the product water flow. It should be 1.1 (10 °C) to 1.2 (30 °C) l/min.

Step 6

If the flow is lower, slightly close the internal needle valve1. If higher, slightly open it.

Step 7

Repeat steps 4 to 6 until flow and pressures are correct.

Step 8

Check the reject pressure at the pressure gauge on the RO module. The pressure should be below 13 bar — the membrane may need to be cleaned or to be replaced.

NOTE This tool is being replaced by tool P/N 3027493 because of its ease of use. 1) Refer to Needle valve on page 27.

108

P/N 3027437 Rev. B

Maintenance

WRO 300/300 H

6.5 Conductivity Adjustment NOTE The conductivity of a reverse osmosis unit is intended as an indication of the performance of the device. As such, there is no need for an absolute calibration. The procedure below, referred to as calibration in the Internal service menu, will only adjust the conductivity reading of the WRO unit to correspond to the reading of an external, temperature-compensated conductivity reference meter, designed for conductivity measurements in pure water. NOTE When using software version P3.2 or lower the conductivity reading in internal service mode will differ from the reading on the display of the WRO unit, as the value in internal service is not temperature compensated. Check the conductivity reading on the display of the WRO unit after making adjustments.

6.5.1 Adjustment Procedure1 Step 1

Start the WRO unit in run mode by pressing minutes for the conductivity to stabilize.

. Wait for 15

Step 2

Create a product water consumption, about 0.5 l/min, by means of an adjustable valve or equal.

NOTE The product water temperature sensor is also used for the temperature compensation calculation of the feed water conductivity. If the adjustment is to be made after a heat disinfection of a WRO 300 H unit, 30 extra minutes is required for the temperature equalization within the flow path. 6.5.1.1 Product Water (PW) Adjustment Step 1 Enter INTERNAL SERVICE, CALIBRATE COND and PW. Step 2

Check that OFFSET is set to 0. If not, change it to 0.

Step 3

Use a conductivity reference meter to read the product water conductivity from the loop.

Step 4

Use the up and down arrows to adjust the COEFF so that the temperature compensated value (T) corresponds to the value of the reference meter (it takes a couple of seconds between each adjustment until the display value is updated). A higher coefficient will result in a lower conductivity value and vice versa.

1. Refer to Internal Service on page 59, Calibrate Cond on page 65. P/N 3027437 Rev. B

109

Maintenance

WRO 300/300 H

Step 5

Press

to confirm.

NOTE Remember to turn the WRO unit off and on with the mains power switch to ensure changes are correctly used by the program. Step 6

Press three times to exit the internal service mode and go back to normal display.

6.5.1.2 Feed Water Adjustment: Step 1 Enter INTERNAL SERVICE, CALIBRATE COND and FW. Step 2

Check that OFFSET is set to 0. If not, change it to 0.

Step 3

Use a conductivity reference meter to read the feed water conductivity at the tap.

Step 4

Use the up and down arrows to adjust the COEFF so that the temperature compensated value (T) corresponds to or is as close as possible to the value of the reference instrument (it takes a couple of seconds between each adjustment before the display value is updated). A higher coefficient will result in a lower conductivity value and vice versa.

Step 5

Press

to confirm.

NOTE Remember to turn the WRO unit off and on with the mains power switch to ensure changes are correctly used by the program. Step 6

Press three times to exit the Internal Service mode and go back to normal display.

6.6 Checking Operator Panel Step 1

Press the button and at the same time switch on the WRO unit using the mains power switch.

Step 2

During approximate two seconds after start verify that a frame with the outermost pixels are activated (the overlay blocks the lower part of the display).

NOTE The text TEST WRO 300 will appear on the LCD after the time has expired. Step 3 110

Press and hold

and verify that the button lights. P/N 3027437 Rev. B

Maintenance

WRO 300/300 H Step 4

Release the button and verify that the button light is off.

Step 5

Press and hold and verify that the button lights and that all LCD pixels are activated, black (the overlay blocks the lower part of the display).

Step 6

Release the button and verify that the button lights.

Step 7

Press and hold

Step 8

Release the button and verify that the button light is off.

Step 9

Press and hold the flashes.

and verify that the button lights.

and verify that the LCD back-light

Step 10 Release the button and verify that the back-light stops flashing. Step 11 Press and hold the sounding.

and verify that the loudspeaker is

Step 12 Release the button and verify that the loudspeaker is silent.

6.7 Checking Chemical Intake O-rings To avoid insufficient intake of chemicals because of air leakage, regularly check that the o-ring on the disinfection wand and the two o-rings in the chemical intake are intact. Change if any sign of damage.

6.8 Battery Replacement 6.8.1 WRO 300/300 H Battery Description

Type

Location

Battery to real time clock, 3V Lithium

CR2025 (or equivalent)

On the CPU board

6.8.2 Battery and Electronic Waste Handling Separate collection for electrical and electronic equipment

P/N 3027437 Rev. B

111

Maintenance

WRO 300/300 H

6.8.3 Waste Handling Battery from WRO 300/300 H shall not be discarded in normal waste — instead separate and proper collection systems must be used. If improperly disposed, battery might contaminate the environment and risk the health of people. NOTE Follow local legislation applicable for Battery and electronic waste handling.

112

P/N 3027437 Rev. B

Electrical Safety

WRO 300/300 H

7 Electrical Safety 7.1 Protective Earth Test 7.1.1 Test Equipment for PET Test. Digital multimeter: Manufacturer: Fluke Resistance: accuracy ±0.5 percent

7.1.2 PET for WRO 300 Step 1

Check that the resistance between the grounding clips of the mains plug and the exterior cover of the power supply is 0.3 Ohm.

Step 2

Check that the resistance between the grounding clips of the mains plug and the chassis grounding screw is 0.3 Ohm.

7.1.3 PET for WRO 300 H Step 1

Check that the resistance between the grounding clips of the mains plug and the exterior cover of the power supply is 0.3 Ohm.

Step 2

Check that the resistance between the grounding clips of the mains plug and the chassis grounding screw is 0.3 Ohm.

Step 3

Check that the resistance between the grounding clips of the mains plug and the Heater A metal cover is 0.3 Ohm.

Step 4

Check that the resistance between the grounding clips of the mains plug and the Heater B metal cover is 0.3 Ohm.

7.2 Electrical Leakage Test (ELT) 7.2.1 ELT Test Equipment Safety tester: According IEC 60601-1 Suggested Manufacturer: Metron, Rigel, Biotect

7.2.2 ELT General Conditions

P/N 3027437 Rev. B



Ensure that the WRO unit is connected to both feed water and drain.



Connect the WRO unit to the outlet supply of the safety tester. Use a mains plug adapter for respective mains plug.



No other external equipment other than specified in this instruction should be connected to the machine.

113

Electrical Safety

WRO 300/300 H



The protective earth of the WRO unit must not be in contact with any external protective earth (earth ground).



The product water loop should be open to drain.

7.2.3 ELT WRO 300 Measure the earth leakage current with the safety tester: Step 1

Start the WRO unit by pressing light).

until light goes on (steady

Step 2

Take the highest reading when the machine is running (test period 5 minutes).

Step 3

Invert the mains phases. The WRO unit may restart.

Step 4

Take the highest reading when the machine is running (test period 5 minutes).

Step 5

Check that the highest measured readings don't exceed the earth leakage current limit for WRO 300 (see table below).

7.2.4 ELT WRO 300 H Measure the earth leakage current with the safety tester: Step 1

Start the WRO unit in LFH from the SELECT menu.

Step 2

Wait 10 minutes; verify that the WRO unit is still in LFH. Record the reading.

Step 3

Invert the phases of the mains. The WRO unit might restart.

Step 4

Wait 5 minutes; verify that the WRO unit is still in LFH. Record the reading.

Step 5

Check that the highest measured readings don't exceed the earth leakage current limit for WRO 300 H, see table below.

7.2.5 Earth Current Limits

Earth Leakage Current

114

Voltage

Current

220 – 240 VAC

Max. 250 µA

115 VAC

Max. 145 µA

100 VAC

Max. 140 µA

P/N 3027437 Rev. B

Technical Data

WRO 300/300 H

8 Technical Data 8.1 Performance and Specification Values Product water

Output flow

Minimum 1.1 l/min • •

Product water loop

at +10 °C feed water temperature at 0.15 MPa (22 psi) pressure in the product water loop

Maximum 2 metres (2 x 1 m) uninsulated Maximum 20 metres (2 x 10 m) insulated*

*under the following conditions; • • •

MCP recommended insulation shall be used the minimum feed water temperature is +10 °C the minimum ambient temperature is +18 °C

Product water pressure

0.12 to 0.6 MPa (17 to 87 PSI) during RUN mode (depending of the consumption from product water loop)

Quality

Dependent on feed water quality. If potable water is used, the following rejection rates will be obtained: • •

P/N 3027437 Rev. B

Total dissolved salts: >96% (based on conductivity); at +10 °C feed water temperature Bacteria and endotoxins: >99%

115

Technical Data

WRO 300/300 H

Values Water Supply

Input

Min. 3.0 l/min required

Feed Water Pressure

During operation — there is an inlet flow of water into the WRO unit. 0.15 to 0.3 MPa (22 to 45 PSI) Maximum design pressure: 0.8 MPa (115 psi) If the feed water pressure exceeds 0.3 MPa (45 psi), a flow regulator, order number WTW522001001, should be installed.

Feed Water Temperature +5 to +30 °C Feed Water Quality

Potable water should be used. Particle filtration shall be used (<5 m) Carbon filtration shall be used if water is chlorinated, see limits below. Membrane life expectancy might be reduced if the monitor is operated outside the following limits.

Drain

Tank Air Vent

Hardness

<0.3 °dH (6 ppm as CaCO3)

Iron

<0.1 mg/l

Manganese

<0.1 mg/l

Turbidity

<1 JTU

Total dissolved salts (TDS)

<1500 mg/l

Fouling index (silt density index)

<5

Chlorine (total)

<0.1 mg/l

Drain output flow during run mode

1.2 ±0.1 l/min

Height difference between the drain hose outlet and the WRO 300 H drain outlet.

Maximum 1.0 m

Drain (length of hose)

Maximum 5 m

Drain flow capacity

Minimum 3.0 l/min required

Max temperature

85 °C

This outlet connects the tank to the atmosphere. This outlet must be connected with an air gap if plumbed to a drain. If a hose is connected to the Tank air vent, the hose shall have a constant slope.

NOTE Air will move back and forth in this line because of the variation of the level in the tank.

Chemical intake

116

The machine is designed to bring in disinfectant-cleaning agent through the chemical intake. The maximum suction height from chemical intake is 600 mm.

P/N 3027437 Rev. B

Technical Data

WRO 300/300 H

Values Fluid Connections

Designed for flexible, reinforced tubing 8 mm x 2.5 mm (5/16 in. I.D.) The product water loop is designed for flexible, reinforced tubing 5 mm x 3 mm.

Operating range Conductivity Product water conductivAccuracy measurement ity (Temperature compensated) Feed water conductivity

1–500 µS/cm ±10% or ±10 µS/cm Whichever is greater

Operating range

10 - 2000 µS/cm

Accuracy

±10% or ±10 µS/cm Whichever is greater

Temperature measurement

Operating range

0 to 105 ºC

Accuracy

±4 ºC

Reverse osmosis module

Membrane material

Polyamide, thin film composite

Membrane configuration

Spiral wound

Membrane pH tolerance

2 to 11

Power supply

Mains Voltage

100 to 240 VAC (line voltage range 85 to 264 VAC)

Frequency

50 or 60 Hz (line frequency range 45 to 65 Hz)

Power Consumption Max 1500 W (100 VAC) 1380 W (115 VAC) 1850 W (220-240 VAC)

P/N 3027437 Rev. B

Appliance inlet

According to IEC 60320; C14

Cable

Cable with protective earth Conductor length max. 3.5 m minimum 1 mm² (220-240 VAC) AWG 16 at 100 and 115 VAC

Mains plug

North America type—100 and 115 VAC, Hospital grade, earthed plug, type IEC 60 083; A5-15

Fuses

15 A slo blo (115 VAC) 15 A slo blo (100 VAC)

Earth Leakage Current

Max. 250 µA (220–240 VAC) Max. 145 µA (115 VAC) Max. 140 µA (100 VAC)

117

Technical Data

WRO 300/300 H

Values Connection of External Equipment

External connector 8 pins REDEL, yellow. Not used.

External connector 8 pins REDEL, black. RS-232

Logging interface

Max input voltage

±15 VDC

High level min output voltage

5.0 VDC

Low level max output voltage

5.0 VDC

Max Current

±5 mA DC

External connector 8 pins REDEL, green. Not used.

Sound

118

Sound power level

Less than 65 dBa during normal operation

P/N 3027437 Rev. B

Technical Data

WRO 300/300 H

8.2 Chemical Disinfection Disinfection

The following disinfectants may be administered via the chemical intake: • •

Cleaning agents

The following cleaning agents may be administered via the chemical intake: • • • • •

Preservation

Exterior cleaning

MINNCARE® Cold Sterilant Other peracetic acid disinfectants, provided that they are approved by the manufacturer for disinfection of thin film composite reverse osmosis membranes made of modified polyamide. Follow the manufacturer instructions for use for the specific disinfectant.

Citric acid Minnclean® AC Minnclean® TF Acetic Acid (5%) Other cleaning agents may also be used, provided that they are approved by the manufacturer for cleaning of thin film composite reverse osmosis membranes made of modified polyamide. Follow the manufacturer's instructions for use for the specific cleaning agent.

The following preservations may be administered via the chemical intake and feed water inlet: • • •

MEMSTOR MEMSTOR in combination with 9% glycerol Formalin

• • •

Ethanol (70%) Isopropanol (60%) Soapy water

8.3 Physical Data Measurements

Values

Weight

33 kg (72.8 lb)

Height

563 mm (22.2 inch)

Depth

Max 520 mm (20.5 inch) Footprint 380 mm (15.0 inch)

Width

Max 205 mm (8.1 inch) Footprint 185 mm (7.3 inch)

Internal fluid volume

P/N 3027437 Rev. B

Approximately 3.5 liters excluding the product water loop

119

Technical Data

WRO 300/300 H

8.4 Materials Contacting Product Water Type

Material

Polymers

PA (Polyamide) PEEK (Polyetheretherketone) PEI (Polyetherimide) PE (Polyethylene) PFA (Fluorocarbon) POM (Polyoxymethylene) PP (Polypropylene) PPS (Polyphenylensulphite) PVC (Polyvinylchloride) PVDF (Polyvinyliden fluoride)

Rubber

Q (Silicone)

Metals

Titanium Stainless steel

Others

Ceramic

8.5 Environmental Data Value Operation

Ambient Temperature range

+10 to +40 °C

Relative Humidity range

30 to 85% RH

Air Pressure range

700 to 1060 hPa

Transportation Ambient Temperature range -10 to +40 °C Relative Humidity range 10 to 95% RH and storage Air Pressure range

500 to 1060 hPa

For transportation and storage below the freezing point, the WRO 300 H must be filled with a preservation solution of 2% MEMSTOR, at least 9% glycerol and the remaining parts RO water. During transportation and storage the equipment must be kept in its original packing. If transportation or storage time is more than 15 weeks, the environmental data relating to the operation must be followed. If condensation occurs when moving the equipment between locations with different temperatures and high relative humidity (for example, outdoor and indoor locations), the inside of the equipment must be allowed to dry before switching on the equipment.

120

P/N 3027437 Rev. B

Technical Data

WRO 300/300 H

8.6 Electromagnetic Environment Value The WRO 300 H is intended for use in the electromagnetic environment specified below. The customer or the user of the WRO 300 H should assure that it is used in such an environment.

Emissions Test Compliance

Electromagnetic Environment — Guidance

RF emissions CISPR 11

Group1

The WRO 300 H uses RF energy only for its internal function. Therefore, its RF emissions are very low and are not likely to cause any interference in nearby electronic equipment

RF emissions CISPR 11

Class B

Harmonic emissions IEC 61000-3-2

Class A (Not applicable for 115 V version)

The WRO 300 H is suitable for use in all establishments, including domestic establishments and those directly connected to the public low-voltage power supply network that supplies buildings used for domestic purposes

Voltage fluctuations/ Complies (Not applicable for flicker emissions 115 V version) IEC 61000-3-3

IEC 60601 Test Level

Compliance Level

Electromagnetic Environment — Guidance

Electrostatic discharge (ESD)IEC 61000-4-2

±6 kV contact ±8 kV Air

±6 kV contact ±8 kV Air

Floors should be wood, concrete or ceramic tile. If floors are covered with synthetic material, the relative humidity should be at least 30%.

Surge IEC 61000-45

±1 kV for differential mode ±2 kV for common mode

1 kV for differential mode ± 2kV for common mode

Mains power quality should be that of a typical commercial or hospital environment

Voltage dips, short interruptions and voltage variations on power supply input lines. IEC 61000-4-11

<5% UT 1(>95% dip in UT) for 0.5 cycle

<5% UT (>95% dip in UT) for 0.5 cycle

Mains power quality should be that of a typical commercial or hospital environment.

40% UT (60% dip in UT) for 5 cycles

40% UT (60% dip in UT) for 5 cycles

70% UT (30% dip in UT) for 25 cycles

70% UT (30% dip in UT) for 25 cycles

<5% UT (>95% dip in UT) for 5 sec

<5% UT (>95% dip in UT) for 5 sec

3 A/m

3 A/m

Immunity Test

Power frequency (50/60 Hz) magnetic field IEC 61000-4-8

P/N 3027437 Rev. B

Power frequency magnetic fields should be at levels characteristic of a typical location in a typical commercial or hospital environment.

121

Technical Data

WRO 300/300 H

Value IEC 60601 Test Level

Compliance Level

Electromagnetic Environment — Guidance2

Conducted RFIEC 61000-4-6

3 Vrms 150 kHz to 80 MHz

3V

Portable and mobile RF communications equipment should be used no closer to any part of the WRO 300 H, including cables, than the recommended separation distance calculated from the equation applicable to the frequency of the transmitter. Recommended separation distance, d = 1.2 P where P is the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer and d is the recommended separation distance in meters (m).

Radiated RFIEC 61000-4-3

3 V/m 80 MHz to 3.0 GHz

3 V/m

d = 1.2 P 80 to 800 MHz3

-

30 V/m

Immunity Test

Radiated RF mobile phones

122

d = 2.3 P 800 MHz to 2.5 GHz Field strengths from fixed RF transmitters, as determined by an electromagnetic site survey 4, should be less than the compliance level in each frequency range5. Interference may occur in the vicinity of equipment marked with the following symbol:

P/N 3027437 Rev. B

Technical Data

WRO 300/300 H

Value Recommended separation distances between portable and mobile RF communications equipment and the WRO 300 H The WRO 300 H is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of the WRO 300 H can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the WRO 300 H as recommended below, according to the maximum output power of the communications equipment.

Rated maximum output power of transmitter W

Separation distance according to frequency of transmitter (m) 150 kHz to 80 MHz d = 3.5 ------3

80 MHz to 800 MHz 6 d = 3.5 ------3

P

800 MHz to 3 GHz P

0,01

0.11

0.11

0.23

0,1

0.37

0.37

0.74

1

1.2

1.2

2.3

10

3.7

3.7

7.4

100

12

12

23

Rated maximum output power of mobile phone

-

-

2W GSM/3G

-

-

d = 7--3

P

7d = ----30

P

0.33

For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters (m) can be estimated using the equation applicable to the frequency of the transmitter, where P is the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer. 1. NOTE: UT is the AC mains voltage prior to application of the test level. 2. NOTE: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures, objects and people. 3. NOTE: At 80 MHz and 800 MHz, the higher frequency range applies. 4. Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic environment due to fixed RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the location in which the WRO 300 H is used exceeds the applicable RF compliance level above, the WRO 300 H should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the WRO 300 H. 5. Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m. 6. NOTE: At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.

P/N 3027437 Rev. B

123

Technical Data

WRO 300/300 H

8.7 Safety The machine complies with the following standards: IEC 60601-1 General requirements for safety, Class I, type B, and IPX1. IEC 60601-1-2 Electromagnetic compatibility.

124

P/N 3027437 Rev. B

Troubleshooting

WRO 300/300 H

9 Troubleshooting 9.1 Alarms A message text is shown on the display when an alarm condition exists. If multiple alarm conditions are present, only the last generated alarm message displays. The others can be accessed by pressing and then using the arrow buttons to scroll through the messages. The following troubleshooting tables provide a reason and a list of recommended actions for each alarm message. If the first action does not clear the alarm, proceed to the second one and so on until the problem is fixed. Descriptions of the different buzzer sounds are found in Buzzer Sounds on page 31

9.1.1 General Alarm No Message

Definition

101

WRO

CONDUCTIVITY SENSOR FAILURE

Buzzer sounds with alarm sound, flashes, message text displays.

Reason

The initial conductivity system check (peak test) has failed.

Action

1

2

3

P/N 3027437 Rev. B

False alarms may be issued if the feed water conductivity is very low (<50 S/ cm) or if the unit is operated on reverse osmosis feed water. If so, disable preset S186 to avoid these false alarms. Verify the product water conductivity reading against an external conductivity reference instrument and calibrate if necessary. If the product water conductivity cannot be calibrated, check the conductivity measurement system (probe and electrical connections). Replace the CPU board if required.

125

Troubleshooting

WRO 300/300 H

Alarm No Message

Definition

102

WRO

HIGH LEVEL SENSOR FAILURE

The WRO unit stops, buzzer sounds with stop sound, flashes, message text displays.

Reason

Failure of high level sensor in tank.

NOTE This alarm relates to optical sensors only. As a general recommendation we advise changing to float level switches. Action

1

2 3 4 103

: N INTERNAL ERROR

WRO

If float level switches have been installed: Verify that preset S227 has been changed to MECHANICAL. Check the connections to the high level sensor. Remove the high level sensor and clean it with a mild soap solution if optical type. If problem persists, change to float level switches.

The WRO unit stops, buzzer sounds with stop sound, flashes, message text displays.

126

Reason

Control unit failure.

Action

The number (N) displayed before the alarm text identifies which specific kind of alarm that has occurred. For description refer to the table below.

P/N 3027437 Rev. B

Troubleshooting

WRO 300/300 H 9.1.2 Internal Error (103:N)

P/N 3027437 Rev. B

103:N

Reason for Internal Error

1-5

The preset memory structure is veri- 1 fied at start-up. If the structure is changed in an uncontrolled way, an internal software error will be issued. The nature of the problem deter2 mines which error that will be issued. It is normal to get one or more of the internal errors when the software version is updated. Contact MCP for detailed information regarding which errors that could be expected.

Restart the WRO unit. Verify that the alarm is not re-issued and that the preset values are according to local settings using GXP. Replace the CPU board if problem persists. Perform all necessary actions according to the replacement matrix, refer to Replacements on page 57.

6

Heater startup test in heat disinfec- 1 tion or low flow heat. The RO pump is stopped. The reading from the flow indicator (located in the reject line) and from the flow meter (located in the product water 2 line) are both verified. in this case, the indication should be that no flow 3 is going through the flow path. The test expects stable output from both sensors during five seconds. The test period is thirty seconds. If the test fails the alarm is issued.

Use GXL and verify that the indication from both sensors corresponds to no flow. In case of wrong indication check cable connection and replace the fault component if needed. Replace the CPU board if the reading from the flow meter is incorrect. Replace the AC relay board if the reading from the flow indicator is incorrect.

7

Heater start up test in heat disinfection or low flow heat. The RO pump is stopped. The system has detected that there is no flow through the system. It should not be possible to connect the mains supply to the heater rods when there is no flow through the system. The flow sensor/meter is verified for correct output. The output will hardware wise control the safety relay. The test aims to verify that the safety relay is able to switch off the heater rod mains supply.

Action

Replace the AC relay board

127

Troubleshooting

WRO 300/300 H

103:N

Reason for Internal Error

Action

8

Heater start-up test in heat disinfection or low flow heat. The water level in the tank is verified to be above low level sensor (LL). The RO pump is started and there is no flow diverted to drain. The reading from the flow indicator (located in reject line) and from the flow meter (located in the Product water line) are both verified. There should be a constant indication for twenty seconds from both sensors that there is a flow through the system. If not, the alarm is issued. The test period is five minutes.

1

2

3

4 5

128

Verify that there are no water leaks and that there is no water consumption from the product water loop. The alarm could be issued if the RO membrane is changed and the air in the RO module is not removed before the heating/low flow heat is started. Before re-start of the heating/low flow heat, start the WRO 300 H in RUN. Let the WRO unit remain in RUN for five minutes and then re-start the heat/low flow heat. Use GXL and verify that the indication from both sensors corresponds to flow. In the case of wrong indication check cable connection and replace the fault component if needed. Replace the CPU board if the reading from the flow meter is incorrect. Replace the AC relay board if the reading from the flow indicator is incorrect.

9

Heater start-up test in heat disinfection or low flow heat. The test of flow indicator and flow meter passed. There is no mains voltage connected to the heater rods when the control circuit is switched on.

10

Heater start-up test in heat disinfec- Replace the CPU board if the problem persists. tion or low flow heat. Product temperature (T1) circuit broken; too low or too high temperature detected.

11

Heater start-up test in heat disinfection or low flow heat. Reject temperature (T2) circuit broken; too low or too high temperature detected.

Replace the CPU board if the problem persists.

12

No valid safe-memory bank. New memory bank created; all values are set to default.

1

Change the AC relay board.

2

Restart the WRO unit and verify that the alarm is not re-issued. Replace the CPU board if problem persists. Perform all necessary actions according to the replacement matrix, Replacements on page 57.

P/N 3027437 Rev. B

Troubleshooting

WRO 300/300 H 103:N

Reason for Internal Error

Action

13

Error when read old preset values moving to E2-prom.

1

Restart the WRO unit and verify that the alarm is not re-issued. Replace the CPU board if problem persists. Perform all necessary actions according to the replacement matrix, Replacements on page 57.

2

Verify the conductivity measurement and calibrate the sensors if needed.

1

Restart the WRO unit and verify that the alarm is not re-issued. Replace the CPU board if problem persists. Perform all necessary actions according to the replacement matrix, Replacements on page 57.

2

Verify the conductivity measurement and calibrate the sensors if needed.

1

Check the connection of the product water temperature sensor (T1). a. Change the temperature sensor if the reading is around 0 ºC. b. Verify that the temperature sensor is properly connected to the CPU board. Temperature reading around 116 0 ºC indicates problems with the connection. Replace the CPU board if the problem persists.

14

15

The memory storage area for the conductivity sensor calibration data is corrupted.

Heater start-up test in heat disinfection or low flow heat. Product temperature sensor (T1) short circuit or not connected.

2 16

Heater start-up test in heat disinfection or low flow heat. Reject temperature sensor (T2) short circuit or not connected.

1

2 17

Heater start-up test in heat disinfection or low flow heat. Return temperature sensor (T3) short circuit or not connected.

1

2

P/N 3027437 Rev. B

Check the connection of the reject water temperature sensor (T2). a. Change the temperature sensor if the reading is around 0 ºC. b. Verify that the temperature sensor is properly connected to the CPU board. Temperature reading around 116 0 ºC indicates problems with the connection. Replace the CPU board if the problem persists. Check the connection of the return water temperature sensor (T3). a. Change the temperature sensor if the reading is around 0 ºC. b. Verify that the temperature sensor is properly connected to the CPU board. Temperature reading around 116 0 ºC indicates problems with the connection. Replace the CPU board if the problem persists.

129

Troubleshooting

WRO 300/300 H

103:N

Reason for Internal Error

Action

18

Heater start-up test in heat disinfection or low flow heat. The control circuit on the AC relay board is verified to be turned off when the flow indicator and flow meter indicates flow. The alarm is issued if mains supply is detected to be connected to the heater rods.

Replace AC relay board.

19

Heater start-up test in heat disinfection or low flow heat. The heater mains supply is switched on when there is an identified stable flow through the system. The test is executed by connecting the mains power to the heater rods on the AC relay board when the flow is stable. It is then verified that there is mains supply connected to the heater rods.

1

20

Not used.

Not applicable.

21

The alarm is issued if the heat disin- 1 fection temperatures at the Heater A (reject water) and the product water 2 loop return temperature is not reached within 60 minutes. 3

2 3 4 5

4 5 6 7 22

The alarm is issued if the temperature in the product water (T1) is below the low flow heat limit for more than 15 minutes.

1 2 3

4 5 6

130

Verify that the fuses located in the AC/DC are still OK. Verify the connection between the AC/DC unit and the AC relay board. Replace AC relay board. Replace the CPU board. Verify the AC output from the AC/DC unit. Change the unit if there is no AC output.

Re-start the Heating and verify that no alarms are issued. Verify that both heater rods are connected to the AC relay board. Verify that the preset, CHC_SUPPLY_VOLTAGE, is set to the correct mains supply voltage. Replace the AC relay board. Replace the CPU board. Replace Heater A (reject water). Replace Heater B (product water loop). Re-start the Heating and verify that no alarms are issued. Verify that both heater rods are connected to the AC relay board. Verify that the preset, CHC_SUPPLY_VOLTAGE, is set to the correct mains supply voltage. Replace the AC relay board. Replace the CPU board. Replace Heater B (product water loop).

23

The alarm is issued if it is a new machine or if the run-time data is corrupted at program start-up. The run-time will be set to zero.

Replace the CPU board if the problem persists.

24

The alarm is issued the first time a new WRO unit is started or when the RTC (Real Time Clock) data is corrupted.

1 2

Use internal service and readjust the REAL TIME. Replace the CPU board if the problem persists.

P/N 3027437 Rev. B

Troubleshooting

WRO 300/300 H 103:N

Reason for Internal Error

Action

25

The RO pump motor controller unit is supervised. It is verified that the motor is rotating when the motor is commanded to run. The measured motor rpm is used as feedback. The alarm is issued when the motor controller unit stops the RO pump motor. The reasons for stopping the motor could be high temperature in the motor control unit, high current consumption, low motor controller unit supply voltage, etc.

1 2

26

The E2-prom read/write time-out limit is exceeded.

Replace the CPU board if the problem persists.

Start the WRO unit in RUN mode. If the alarm is issued, immediately continue as follows: 3 Verify that the connection between the motor controller unit and the CPU board is working properly. 4 Replace the RO pump if it is blocked. 5 Replace the RO pump motor including the controller unit. 6 Replace the CPU board. If the alarm is issued after a while continue as follows: 1 Perform pressure and flow adjustment according to the instructions in 6.5 Adjusting the flow and the pressure 2 Check the air-filter located at the AC/ DC unit. 3 Verify that the ambient temperature where the WRO unit is located is in accordance with the specifications in Technical Data. 4 Replace the RO-pump motor including the controller unit.

9.1.3 Internal Error (104) 104

INVALID WRO WATER LEVEL

The WRO unit stops, buzzer sounds with alarm sound, flashes, message text displays.

Reason

During filling of the inlet water tank, the high level sensor has not detected water within the expected time period. The time is defined by preset S233.

Action

1 2

3

4

Replace optical level sensors to float level switches if not already done. Start the WRO unit in RUN mode. Use logging in Internal service to verify proper function of the high level sensor. Replace the high level sensor if needed. Adjust the preset S233 if the WRO unit is installed with poor water supply or water supply with large variations in flow. If the alarm still remains, the overflow supervision system can be disabled by setting preset S233 to zero (0).

CAUTION This action will overrule the overflow supervision function.

P/N 3027437 Rev. B

131

Troubleshooting

WRO 300/300 H

9.1.4 Operation No 201

Alarm and Notifications CONDUCTIVITY NOTIFICATION

Definition WRO

When entering STANDBY mode, buzzer sounds with notification sound, flashes, message text displays.

Reason

The conductivity value has exceeded the notification limit for more than 30 consecutive seconds during previous run period. The purpose of this notification is to give an early warning of elevated conductivity.

Action

1

2

3

4

5

132

Start the WRO unit and let it run for at least 15 minutes (to allow for equalization of the water temperature within the unit). Verify both feed and product water conductivity reading against an external conductivity reference instrument and calibrate if necessary. If the feed water conductivity has increased compared to initial values, the product water conductivity will also increase. Adjust the conductivity notification limit to correspond to the new situation. If the feed water temperature has increased significantly since the time of installation, this will have an effect on the salt rejection ability of the reverse osmosis membrane, leading to higher product water conductivity. Adjust the conductivity notification limit to correspond to the new situation. If the product water conductivity has increased without a change in feed water conductivity: a. Verify that the WRO is correctly adjusted regarding pressure and flow conditions. b. Check that the reject flow to drain is in accordance with specifications (1.2 ±0.1 l/min). If it is too low, check the constant flow valve (18) for obstructions. Also check the function of the three-way valve REVA (20). Refer to component 18 and 20 in Flow diagrams on page 15. c. If the water save function is used, a too high setting may cause elevated conductivity. Readjust the water save factor to a lower setting. d. The RO membrane may be fouled. Perform cleaning according to the Operator's Manual (if not already done). Recheck pressure and flow. If the problem is still not resolved, the RO module may have suffered damage due to improper feed water quality or pretreatment. Exchange the RO element or RO module.

P/N 3027437 Rev. B

Troubleshooting

WRO 300/300 H

No 202

Alarm and Notifications CONDUCTIVITY ALARM

Definition WRO

Buzzer sounds with alarm sound,

flashes, mes-

sage text displays Reason

The conductivity value has exceeded the alarm limit for more than 30 consecutive seconds.

Action

1

2

Start the WRO unit and let it run for at least 15 minutes (to allow for equalization of the water temperature within the unit). Verify both feed and product water conductivity reading against an external conductivity reference instrument and calibrate if necessary. If the feed water conductivity has increased compared to initial values, the product water conductivity will also increase. The conductivity alarm limit then has to be adjusted to correspond to the new situation.

CAUTION

3

4

5

P/N 3027437 Rev. B

Changing the conductivity alarm limit may require approval from medical personnel. If the feed water temperature has increased significantly since the time of installation, this will have an effect on the salt rejection ability of the reverse osmosis membrane, leading to higher product water conductivity. Adjust the conductivity alarm limit to correspond to the new situation. Refer to caution note above. If the product water conductivity has increased without a change in feed water conductivity: a. Verify that the WRO is correctly adjusted regarding pressure and flow conditions. b. Check that the reject flow to drain is in accordance with specifications (1.2 ± 0.1 l/min). c. If the water save function is used, a too high setting may cause elevated conductivity. Readjust the water save factor to a lower setting. d. The RO membrane may be fouled. Perform cleaning according to the Operator's Manual (if not already done). Recheck pressure and flow. If the problem is still not resolved, the RO module may have suffered damage due to improper feed water quality and/or pretreatment. Exchange the RO element or RO module.

133

Troubleshooting

No

WRO 300/300 H Alarm and Notifications

203 CONDUCTIVITY STOP

Definition WRO

The WRO unit stops, buzzer sounds with alarm sound, flashes, message text displays.

Reason

The conductivity value has exceeded the stop limit for more than 30 consecutive seconds.

Action

1 2

Start the WRO unit and verify the fault condition. Check that the reject flow to drain is in accordance with specifications (1.2 ± 0.1 l/min). If it is too low, check the constant flow valve (18) for obstructions. Also check the function of the threeway valve REVA (20). Refer to component 18 and 20 in Flow diagram for the WRO 300 H unit on page 15 and Flow diagram for the WRO 300 unit on page 15.

3

Verify both feed and product water conductivity reading against an external conductivity reference instrument and calibrate if necessary. If the product water conductivity cannot be calibrated, check the conductivity measurement system (probe and electrical connections). Replace the CPU board if necessary. If the feed water conductivity has increased compared to initial values, the product water conductivity will also increase. The conductivity stop limit then has to be adjusted to correspond to the new situation.

4

5

CAUTION Changing the conductivity alarm limit may require approval from medical personnel. 6

7

134

If the feed water temperature has increased significantly since the time of installation, this will have an effect on the salt rejection ability of the reverse osmosis membrane, leading to higher product water conductivity. Adjust the conductivity alarm limit to correspond to the new situation. Refer to caution note above. If the product water conductivity has increased without a change in feed water conductivity: a. Verify that the WRO is correctly adjusted regarding pressure and flow conditions. b. If the water save function is used, a too high setting may cause elevated conductivity. Readjust the water save factor to a lower setting. c. The RO membrane may be fouled. Perform cleaning according to the Operator's Manual (if not already done). Recheck pressure and flow.

P/N 3027437 Rev. B

Troubleshooting

WRO 300/300 H

No

Alarm and Notifications

Definition 8

9

204 INSUFFICIENT WATER SUPPLY

WRO

The WRO unit stops, displays.

flashes fast, message text

Reason

The empty level sensor indicates that the inlet tank is empty.

Action

1

2 3

4

P/N 3027437 Rev. B

If the product water conductivity has increased without a change in feed water conductivity, perform cleaning according to the Operator's Manual (if not already done). Recheck pressure and flow. If the problem remains, the RO module may have suffered damage due to improper feed water quality and/or pretreatment. Exchange the RO element or RO module.

Check that the feed water supply is in accordance with Technical Data. If the message occurs intermittently the feed water pressure may be insufficient. Check the function of the level sensors and the inlet valve via the Internal Service Menu. Check the internal inlet constant flow valve for particles. Refer to component 3 in Flow Diagrams on page 15. Check the external constant flow valve for particles (if applicable).

135

Troubleshooting

No

WRO 300/300 H Alarm and Notifications

205 LOW REJECTION RATE

Definition WRO

When entering STANDBY mode, buzzer sounds with notification sound, flashes, message text displays.

Reason

The conductivity rejection rate has been below set limit for more than 5 consecutive minutes during previous Run period.

Action

1

2

3

4

5

6

136

Start the WRO unit and let it run for at least 15 minutes (to allow for equalization of the water temperature within the unit). Then verify both feed and product water conductivity reading against an external conductivity reference instrument and calibrate if necessary. If the feed water temperature has increased significantly compared to the time of installation, this will have an effect on the salt rejection ability of the reverse osmosis membrane, leading to lower rejection rate. Adjust the notification limit to correspond to the new situation. Verify that the WRO is correctly adjusted regarding pressure and flow conditions and make adjustments if needed. If the product water conductivity has increased without a change in feed water conductivity, perform cleaning according to the Operator's Manual (if not already done). Recheck pressure and flow. If no softener is included in the pretreatment, scaling may have occurred on the feed water conductivity sensor, resulting in too low reading. Unscrew the sensor and clean it with a citric acid solution. If the problem remains, the RO module may have suffered damage due to improper feed water quality and/or pretreatment. Exchange the ROelement or RO module.

P/N 3027437 Rev. B

Troubleshooting

WRO 300/300 H

No

Alarm and Notifications

206 LOW PRODUCT FLOW

Definition WRO

When entering STANDBY mode, buzzer sounds with notification sound, flashes, message text displays.

Reason

The purpose of this notification is to give an early warning of reduced product water output. The notification will be issued when the product water flow rate has been below the set limit for more than 5 consecutive minutes during the previous Run or Standby flush period. Default set limit is 0 ml/min (S224).

NOTE The lowest product water flow rate is obtained when there is no consumption of product water (Standby flush). Action

1

2 3

4

P/N 3027437 Rev. B

Verify that the WRO is correctly adjusted regarding pressure and flow conditions and make adjustments if needed. Perform cleaning according to the Operator's Manual and then recheck pressure and flow. If no problem has been experienced with the supply of water to the dialysis machine, readjust the limit to a lower value. Exchange the RO element or RO module if the situation remains.

137

Troubleshooting

WRO 300/300 H

9.1.5 Heat (only WRO 300 H) Alarm and No notifications 301 INSUFFICIENT HEAT

Definition WRO 300 H

The WRO 300 H unit stops, buzzer sounds with alarm sound,

flashes, message

text displays.

302 INSUFFICIENT WATER SUPPLY

Reason

Power failure.

Action

Re-start the heat disinfection cycle.

WRO 300 H

The WRO 300 H unit stops, buzzer sounds with alarm sound,

flashes, message

text displays. Reason

Lack of feed water.

Action

1

2

3

4 5 303 OVERDUE HEAT

WRO 300 H

Check that the feed water supply is in accordance with Technical Data. If the message occurs intermittently the feed water pressure may be insufficient. Check the function of the level sensors and the inlet valve via the Internal Service Menu. Check the internal inlet constant flow valve for particles. Refer to component 3 in Flow Diagrams on page 15. Check the external constant flow valve for particles (if applicable). If the problem persists, change to float level switches.

When entering STANDBY mode, buzzer sounds with Notification sound, flashes, message text displays.

304 INCORRECT WATER LEVEL

Reason

Automatic start of heat disinfection is activated by Time channel settings but cannot start because the WRO 300 H is not in STANDBY mode.

Action

Check Time channel settings.

WRO 300 H

The WRO 300 H unit stops, buzzer sounds with alarm sound,

and

flashes,

message text displays Reason

Water level in tank is lower than expected.

Action

1 2 3

138

Check that the dialysis machine is disconnected. Check fluid connections and the WRO for leakage. Check the empty level sensor and connection.

P/N 3027437 Rev. B

Troubleshooting

WRO 300/300 H 9.1.6 Chem/Rinse Alarm and No notifications

Definition

401

WRO

REMOVE WAND

Buzzer sounds with alarm sound, flashes, message text displays.

Reason

The chemical intake sensor indicates that the wand is still in place.

Action

1 2 3

402

INSUFFICIENT WATER SUPPLY

WRO

Check the connection cable to the chemical intake sensor. Replace chemical intake sensor. Replace CPU board.

The WRO unit stops, buzzer sounds with alarm sound, flashes, message text displays.

Reason

Lack of feed water.

Action

1

2

3

4 5 403

HIGH CONDUCTIVITY RINSE

WRO

Check the external constant flow valve for particles (if applicable). If the problem persists, change to float level switches.

Buzzer sounds with alarm sound, flashes, message text displays.

Reason

Conductivity value is above Conductivity Notification limit after a prolonged Rinse.

Action

1

2

3

P/N 3027437 Rev. B

Check that the feed water supply is in accordance with Technical Data. If the message occurs intermittently the feed water pressure may be insufficient. Check the function of the level sensors and the inlet valve via the Internal Service Menu. Check the internal inlet constant flow valve for particles. Refer to component 3 in Flow Diagrams on page 15.

Verify with a separate test that there are no residual chemicals in the product water. Verify the product water conductivity reading against an external conductivity reference instrument and calibrate if necessary. If the product water conductivity cannot be calibrated, check the conductivity measurement system (probe and electrical connections). Replace the CPU board if necessary.

139

Troubleshooting

WRO 300/300 H

Alarm and No notifications

Definition

404

WRO

RINSE REQUIRED

Buzzer sounds with alarm sound,

and

flashes, message text displays.

405

INCORRECT WATER LEVEL

Reason

The WRO is filled with chemicals.

Action

If the alarm persists after a second Rinse cycle replace the CPU board.

WRO

The WRO unit stops, buzzer sounds with alarm sound,

and

flashes, mes-

sage text displays. Reason

The water level in the tank is lower than expected.

Action

1 2 3

406

INSUFFICIENT INTAKE

WRO

Check that the dialysis machine is disconnected. Check fluid connections and the WRO for leakage. Check the empty level sensor and connection.

Buzzer sounds with alarm sound,

and

flashes, message text displays. Reason

The product water conductivity is below the minimum intake conductivity limit.

Action

1

2

3

4

5 407

140

INSUFFICIENT TEMPERATURE

Verify that correct amount of disinfectant is consumed during the intake phase. If the intake volume is correct, verify that the set alarm limit is correct. Adjust if required. If the intake volume is too low, check the o-ring on the wand and replace if necessary. Adjust the chemical intake pump capacity coefficient (S151) to correspond to the measured flow. Exchange the chemical intake pump. Verify that the intake volume is correct.

WRO 300 H

Buzzer sounds with alarm sound,

Reason

The temperature during Warm Acid cleaning has not reached above the preset limit.

Action

Refer to alarm 103:21

flashes, message text displays.

P/N 3027437 Rev. B

Troubleshooting

WRO 300/300 H

Alarm and No notifications

Definition

408

WRO

INSERT WAND

The WRO unit stops, buzzer sounds with alarm sound, flashes, message text displays.

Reason

A Central Chemical disinfection has been initiated via the remote control and the disinfection wand is not inserted.

Action

Insert the disinfection wand to continue the Central Chemical disinfection procedure.

9.2 Boot Loader Alarm and No notifications LOAD APPLICATION FAILED

P/N 3027437 Rev. B

Definition WRO

LOAD APPLICATION FAILED is shown on the display.

Reason

Software malfunction.

Action

1 2

Download new program to the WRO. If the LOAD APPLICATION FAILED persists, replace the CPU board.

141

Troubleshooting

WRO 300/300 H

This page is blank.

142

P/N 3027437 Rev. B

Index

WRO 300/300 H

Index A

G

AC relay board . . . . . . . . . . . . . . . . . . . 28 Active cooldown . . . . . . . . . . . . . . . . . . 52 Adjusting Conductivity . . . . . . . . . . . . . . . . . 109 Flow and pressure . . . . . . . . . . . . 106 Air gap . . . . . . . . . . . . . . . . . . . . . . . . . 12 Alarms . . . . . . . . . . . . . . . . . . . . . . . . 125 Auto flush . . . . . . . . . . . . . . . . . . . . . . . 31

GWD - Download . . . . . . . . . . . . . . . . . 75 GXL - Logging . . . . . . . . . . . . . . . . . . . 74 GXP - Preset . . . . . . . . . . . . . . . . . . . . 74

H

Boot loader . . . . . . . . . . . . . . . . . . . . 141

Hardness . . . . . . . . . . . . . . . . . . . . . . 105 Heat disinfection . . . . . . . . . . . . . . . . . . 48 Procedure . . . . . . . . . . . . . . . . . . . . 50 Stop . . . . . . . . . . . . . . . . . . . . . . . . 52 Heaters . . . . . . . . . . . . . . . . . . . . . . . . . 28 Hygiene functions . . . . . . . . . . . . . . . . . 37

C

I

Cartridge . . . . . . . . . . . . . . . . . . . . . . 105 Casing . . . . . . . . . . . . . . . . . . . . . . . . . 21 Change parameters . . . . . . . . . . . . . . . 59 Chemical disinfection . . . . . . . . . . . . . . 37 Chemical intake unit . . . . . . . . . . . . . . 27 Chloramines . . . . . . . . . . . . . . . . . . . . 105 Chlorine . . . . . . . . . . . . . . . . . . . . . . . 105 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . 37 Conductivity . . . . . . . . . . . . . . . . . . . . 109 Adjustment . . . . . . . . . . . . . . . . . . 109 Limits . . . . . . . . . . . . . . . . . . . . . . . 33 Measurement . . . . . . . . . . . . . . . . . 33 Peak test . . . . . . . . . . . . . . . . . . . . 34 Contact Time . . . . . . . . . . . . . . . . . . . . 38 Cooldown . . . . . . . . . . . . . . . . . . . . . . . 52 Cooling fan . . . . . . . . . . . . . . . . . . . . . . 25 CPU board . . . . . . . . . . . . . . . . . . . . . . 28

Intended use . . . . . . . . . . . . . . . . . . . . 11 Internal Service, PC Support . . . . . . . . 59

B

D Defaults . . . . . . . . . . . . . . . . . . . . . . . . Disinfectant Concentration . . . . . . . . . . . . . . . . . Disinfection Default setting . . . . . . . . . . . . . . . . Protocol . . . . . . . . . . . . . . . . . . . . . Dwell period . . . . . . . . . . . . . . . . . . . . .

79 41 94 92 44

E

L Level sensors . . . . . . . . . . . . . . . . . . . . 24 Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Low flow heat . . . . . . . . . . . . . . . . . . . . 53

M Main components . . . . . . . . . . . . . . . . . 20 AC relay board . . . . . . . . . . . . . . . . 28 Casing . . . . . . . . . . . . . . . . . . . . . . 21 Chemical intake unit . . . . . . . . . . . . 27 CPU board . . . . . . . . . . . . . . . . . . . 28 External communication unit . . . . . 28 Flow block . . . . . . . . . . . . . . . . . . . . 26 Heaters . . . . . . . . . . . . . . . . . . . . . . 28 Motor . . . . . . . . . . . . . . . . . . . . . . . 25 Operator’s panel . . . . . . . . . . . . . . . 22 Power supply unit . . . . . . . . . . . . . . 22 RO module . . . . . . . . . . . . . . . . . . . 24 RO pump unit . . . . . . . . . . . . . . . . . 25 Tank . . . . . . . . . . . . . . . . . . . . . . . . 23 Maintenance . . . . . . . . . . . . . . . . . . . . 105 Manual flush . . . . . . . . . . . . . . . . . . . . . 37 Materials contacting product water . . 120 Motor . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Electromagnetic environment . . . . . . 120 External communication unit . . . . . . . . 28

O

F

P

Flow block . . . . . . . . . . . . . . . . . . . . . . Flow diagrams . . . . . . . . . . . . . . . . . . . Functional description Chemical disinfection . . . . . . . . . . . Cleaning . . . . . . . . . . . . . . . . . . . . . Heat disinfection . . . . . . . . . . . . . . . Low flow heat . . . . . . . . . . . . . . . . . RUN mode . . . . . . . . . . . . . . . . . . . Fuses (WRO 300 H unit) . . . . . . . . . . .

P/N 3027437 Rev. B

26 15 37 37 48 53 32 22

Operator’s panel . . . . . . . . . . . . . . . . . . 22

PC support software . . . . . . . . . . . . . . . 71 Peak test . . . . . . . . . . . . . . . . . . . . . . . 34 Performance and specification . . . . . . 115 Power supply unit . . . . . . . . . . . . . 22, 106 Prefilter . . . . . . . . . . . . . . . . . . . . . . . . 105 Preservation . . . . . . . . . . . . . . . . . . . . . 46 with freeze protection . . . . . . . . . . . 46 without freeze protection . . . . . . . . 48 Presets . . . . . . . . . . . . . . . . . . . . . . . . . 79 Chemical disinfection . . . . . . . . . . . 95

143

Index

WRO 300/300 H Presets and defaults Conductivity . . . . . . . . . . . . . . . . . . 85 Disinfection protocol manager . . . . 90 External relay . . . . . . . . . . . . . . . . 101 Heating . . . . . . . . . . . . . . . . . . . . . . 87 Preset Group index . . . . . . . . . . . . 79 Reminders . . . . . . . . . . . . . . . . . . . 99 Remote . . . . . . . . . . . . . . . . . . . . . 100 RO pump . . . . . . . . . . . . . . . . . . . . 83 S-number index . . . . . . . . . . . . . . . 81 Tank control . . . . . . . . . . . . . . . . . . 83 Time channels . . . . . . . . . . . . . . . . 98 Time manager . . . . . . . . . . . . . . . . 96 User interface panel (LCD) . . . . . . 87 Water save . . . . . . . . . . . . . . . . . . . 84

R Recovery ratio . . . . . . . . . . . . . . . . . . . Replacements . . . . . . . . . . . . . . . . . . . Residual test . . . . . . . . . . . . . . . . . 45, Reverse osmosis . . . . . . . . . . . . . . . . . Rinse phase . . . . . . . . . . . . . . . . . . . . . RO module . . . . . . . . . . . . . . . . . . . . . . RO pump . . . . . . . . . . . . . . . . . . . . . . . RUN mode . . . . . . . . . . . . . . . . . . . . . .

54 57 46 11 45 24 25 32

S Spray nozzle . . . . . . . . . . . . . . . . . . . . 23 Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

T Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Tank air vent . . . . . . . . . . . . . . . . . . . . 23 Technical data . . . . . . . . . . . . . . . . . . 115 Chemical Disinfection . . . . . . . . . . 119 Environmental data . . . . . . . . . . . 120 Physical data . . . . . . . . . . . . . . . . 119 Safety . . . . . . . . . . . . . . . . . . . . . . 124 Troubleshooting . . . . . . . . . . . . . . . . . 125

W Water level in tank . . . . . . . . . . . . . . . . 32 Water purification . . . . . . . . . . . . . . . . . 11 Water quality . . . . . . . . . . . . . . . . . . . . 12 Water save Function . . . . . . . . . . . . . . . . . . . . . 53 Preset . . . . . . . . . . . . . . . . . . . . . . . 84 Water testing . . . . . . . . . . . . . . . . . . . 105 Wiring diagrams WRO 300 . . . . . . . . . . . . . . . . . . . 104 WRO 300 H . . . . . . . . . . . . . . . . . 103

Y Y coupling . . . . . . . . . . . . . . . . . . . . . . 23

144

P/N 3027437 Rev. B

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Mar Cor Purification 4450 Township Line Road Skippack, PA 19474-1429 Tel: (484) 991-0220 Toll Free: (800) 633-3080 Fax: (484) 991-0230

Mar Cor Purification 14550 28th Avenue North Plymouth, MN 55447 Tel: (484) 991-0220 Toll Free: (800) 633-3080 Fax: (763) 210-3868

Mar Cor Purification 1119 Paulsun Street San Antonio, TX 78219 Tel: (210) 227-3601 Toll Free: (800) 268-5035 Fax: (210) 227-0735

Mar Cor Purification 160 Stedman Street Lowell, MA 01851 Tel: (978) 453-9600 Toll Free: (800) 633-3080 Fax: (978) 453-1223

Mar Cor Purification 6351 Orangethorpe Ave. Buena Park, CA 90620 Tel: (714) 736-9990 Toll Free: (800) 633-3080 Fax: (714) 736-9402

©2012 Mar Cor Purification, Inc. All rights reserved Visit http://www.mcpur.com or call 1-800-633-3080 for more information. P/N 3027437 Rev. B

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