Philips V60 Service Manual

Respironics V60 Ventilator

Service Manual

For Technical Support and Customer Service, contact:

USA and Canada: 1-800-345-6443 (toll free) or 724-387-4000 Respironics Europe, Africa, Middle East: +33-1-47-52-30-00 Respironics Asia Pacific: +852-3194-2280 Facsimile: 724-387-5012

United States of America

Respironics California, Inc. 2271 Cosmos Court Carlsbad, CA 92011 USA

Email and Web Addresses

service@respironics.com clinical@respironics.com www.respironics.com

Authorized European Representative

Respironics Deutschland GmbH Gewerbestrasse 17 D-82211 Herrsching Germany +49-8-15-29-30-60

2009 Respironics California, Inc. and its affiliates.

This work is protected under Title 17 of the United States copyright code and is the sole property of Respironics California, Inc. No part of this document may be copied or otherwise reproduced, or stored in any electronic information retrieval system, except as specifically permitted under United States copyright law, without the prior written consent of Respironics California, Inc.

1 Introduction and Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.1 Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

1.2 Recommended Test Equipment, Tools, and Supplies . . . . . . . . . . . . . . . . . . 1-3

1.3 Where to Go for Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

2 Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.2 Preparing for Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.3 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.4 Alarms and Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.5 Care and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.6 First-Time Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.7 Communications Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.8 Diagnostic Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

3 Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.1 Pneumatics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.1.1 Air Inlet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3.1.2 Air Inlet Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3.1.3 Air Flow Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.1.4 Machine and Proximal Pressure Transducers . . . . . . . . . . . . . . . . . . . . . 3-3

3.1.5 Barometric Pressure Transducer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.1.6 Oxygen Pressure Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.1.7 Manifold, Oxygen Inlet Filter, Filter Element . . . . . . . . . . . . . . . . . . . . . 3-4

3.1.8 Oxygen Solenoid Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.1.9 Oxygen Flow Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.1.10 Blower. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.1.11 Solenoid Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

3.2 Electronics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

3.2.1 Power management (PM) PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

3.2.2 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

3.2.3 Internal Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

3.2.4 CPU PCBA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

3.2.5 Motor Controller (MC) PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

3.2.6 Data Acquisition (DA) PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

3.2.7 Flow Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

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3.2.8 User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

3.2.9 LCD Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

3.2.10 Backlight Inverter PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

3.2.11 Touch Screen Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

3.2.12 Nav-Ring Assembly (Rotary Adjustment) . . . . . . . . . . . . . . . . . . . . . . 3-12

3.2.13 Power Switch Overlay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

3.2.14 Switch PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

3.2.15 UI PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

3.3 Electronic Signal Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

4 Periodic Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.1 Annual Preventive Maintenance Instructions . . . . . . . . . . . . . . . . . . . . . . . . 4-2

5 Diagnostic Mode and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.1 System Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5.1.1 Selecting a Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5.1.2 Setting Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

5.1.3 Restoring Default Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

5.1.4 Selecting Pressure Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

5.1.5 Enabling Software Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

5.1.6 Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

5.2 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

5.2.1 Viewing Ventilator Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

5.2.2 Pneumatic Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

5.2.3 Output Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13

5.2.4 Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14

5.3 Touch Screen Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18

5.4 Diagnostic Codes, Alarms, and Troubleshooting . . . . . . . . . . . . . . . . . . . . . 5-19

5.5 Miscellaneous Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-31

6 Reports and Software Downloads . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.1 Setting Up the Service PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.1.1 Setting Up the Serial Interface Using HyperTerminal . . . . . . . . . . . . . . . 6-2

6.1.2 Setting Up the Serial Interface Using Tera Term . . . . . . . . . . . . . . . . . . 6-6

6.2 Generating a Diagnostic Report (DRPTA) . . . . . . . . . . . . . . . . . . . . . . . . . 6-17

6.3 Clearing the Significant Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20

6.4 Downloading Ventilator Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21

6.5 Programming the Ventilator Serial Number and Power-On Hours . . . . . . . . . 6-21

6.5.1 Programming the Ventilator Serial Number . . . . . . . . . . . . . . . . . . . . . 6-21

6.5.2 Programming Ventilator Power-On Hours. . . . . . . . . . . . . . . . . . . . . . . 6-23

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7 Component Removal/Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7.1 Disconnecting Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

7.2 Air Inlet Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

7.3 Internal Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

7.4 Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

7.5 AC Inlet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

7.6 Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

7.7 Oxygen Inlet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8

7.8 Motor Controller (MC) PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9

7.9 Separating the UI from the Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10

7.10 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11

7.11 Gas Outlet Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-12

7.12 UI Retainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13

7.13 Proximal Pressure Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14

7.14 Speakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-15

7.15 Power Management (PM) PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-16

7.16 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17

7.17 CPU PCBA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-18

7.18 Real-Time Clock Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-19

7.19 Left Side Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-20

7.20 Gas Delivery Subsystem (GDS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-21

7.21 Right Side Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-23

7.22 Oxygen Inlet Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-24

7.23 Data Acquisition (DA) PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-25

7.24 Air and Oxygen Flow Sensor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 7-27

7.25 Oxygen Solenoid Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-28

7.26 Solenoid Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-29

7.27 Blower. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-30

7.28 Opening the User Interface (UI)/ Rear Bezel . . . . . . . . . . . . . . . . . . . . . . 7-31

7.29 Power Switch Overlay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-32

7.30 Switch PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-33

7.31 Nav-Ring Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-34

7.32 Front Bezel, Touch Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-35

7.33 LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-36

7.34 User Interface (UI) PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-38

7.35 Backlight Inverter PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-39

7.36 LCD Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-40

7.37 Bottom Feet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-41

7.38 Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-42

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8 Performance Verification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

8.1 Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

8.2 Preliminary Cleaning, Inspection and Setup . . . . . . . . . . . . . . . . . . . . . . . . 8-7

8.3 View and Record Ventilator Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8

8.4 Pneumatic Calibration Analyzer Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

8.4.1 Measurement Selection Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

8.4.2 Averaging Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10

8.4.3 Trigger Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11

8.4.4 Configurations Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-12

8.5 Performance Verification Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-15

8.5.1 Electrical Safety (Test 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-15

8.5.2 Leak Tests (Test 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17

8.5.3 Controls (Test 3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-20

8.5.4 Pressure Accuracy (Test 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21

8.5.5 Air Delivery/Flow Accuracy (Test 5) . . . . . . . . . . . . . . . . . . . . . . . . . . 8-24

8.5.6 Oxygen Flow Accuracy (Test 6). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-27

8.5.7 Oxygen Accuracy (Test 7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-29

8.5.8 S/T Performance (Test 8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-31

8.5.9 Alarms (Test 9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-33

8.5.10 Power Fail (Test 10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-35

8.5.11 Internal Battery (Test 11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-36

8.6 Returning Ventilator to Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-37

8.7 Performance Verification Troubleshooting/Repair . . . . . . . . . . . . . . . . . . . . 8-37

8.7.1 Test 1: Electrical Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-38

8.7.2 Test 2: Leak Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-38

8.7.3 Test 3: Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-39

8.7.4 Test 4: Pressure Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-40

8.7.5 Test 5: Air Delivery/Flow Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-40

8.7.6 Test 6: Oxygen Flow Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-41

8.7.7 Test 7: Oxygen Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-41

8.7.8 Test 8: S/T Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-41

8.7.9 Test 9: Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-42

8.7.10 Test 10: Power Fail. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-42

8.7.11 Test 11: Internal Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-43

8.8 Electrical Safety Data Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-44

8.9 Performance Verification Data Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-45

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9 Replacement Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

9.1 Complete Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

9.2 Recommended Inventory Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7

9.3 Ventilator Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10

9.4 Pneumatics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12

9.5 Electronics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-13

10 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

10.1 Control settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

10.2 Patient data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

10.3 Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4

10.4 Menu window settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4

10.5 Operator-accessible diagnostic mode functions . . . . . . . . . . . . . . . . . . . . 10-5

10.6 Physical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5

10.7 Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-6

10.8 Pneumatic specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-6

10.9 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7

10.10 Other specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8

10.11 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8

Appendix A Respi-Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

A.1 Downloading Ventilator Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

A.2 Installing Ventilator Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

A.3 Reinitiate a Software Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8

A.4 Remote Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-13

Appendix B Field Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index-1

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Table of Contents

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viii V60 Ventilator Service Manual 1049766 Rev A

Chapter 1. Introduction and Intended Use

The V60 ventilator is a microprocessor-controlled, positive pressure ventilator assist system. The ventilator provides noninvasive and invasive ventilatory support for spontaneously breathing adult and pediatric patients.

The ventilator has a variety of modes and monitoring capabilities to assist in assessing performance and patient-to-ventilator synchrony. The safety features include in-depth alarms and a variety of integrated safety and self-diagnostic features. Many system functions are automatically checked at startup and during operation.

The ventilator includes a touch screen user interface (UI) and navigation ring (nav-ring) that allows the operator to select ventilator and alarm settings and displays of ventilator and patient data.

The ventilator is designed to be upgradeable, and features communications capabilities and an internal battery backup option.

Read this manual thoroughly before performing service or maintenance on the V60 ventilator. This manual includes advanced troubleshooting, calibration, and maintenance instructions for the ventilator. All maintenance and repair work should be performed by qualified biomedical technicians who have appropriate training and authorization to provide maintenance, repair, and service for the V60.

Review the operating instructions for the V60 ventilator before running tests, checking operational readiness, or initiating patient use. These instructions include important information about ventilator safety and operation.

For additional information about accessories or related equipment, such as humidifiers and remote alarm systems, refer to the appropriate instruction manual prior to operating the V60 ventilator. Review the applicable warnings and cautions in the V60 User Manual before operating the ventilator.

1049766 Rev A V60 Ventilator Service Manual 1-1

Chapter 1

Introduction and Intended Use

1.1 Intended Use The Respironics V60 ventilator is an assist ventilator that is intended to

augment patient breathing. It is intended for spontaneously breathing individuals who require mechanical ventilation: patients with respiratory failure, chronic respiratory insufficiency, or obstructive sleep apnea in a hospital or other institutional settings under the direction of a physician.

The ventilator is intended to support pediatric patients weighing 20 kg (44 lb.) or greater to adult patients. It is also intended for intubated patients meeting the same selection criteria as the noninvasive applications. The ventilator is intended to be used by qualified medical professionals such as physicians, nurses, and respiratory therapists. The ventilator is intended to be used only with various combinations of Respironics recommended patient circuits, interfaces (masks), humidifiers, and other accessories.

1-2 V60 Ventilator Service Manual 1049766 Rev A

Chapter 1

Introduction and Intended Use

1.2 Recommended Test Equipment,

Tools, and Supplies

Table 1-1 lists the recommended tools, test equipment, and materials required to service and maintain the V60 ventilator.

Table 1-1: Recommended Test Equipment, Tools, and Materials

Description Manufacturer and Model

Test Equipment

Digital multimeter (DMM) accurate to three decimal places

Electrical safety analyzer Dale LT 5440 or equivalent

Pneumatic calibration analyzer capable of measuring low pressure (cmH (liters)

Temperature/humidity monitor Fisher Scientific 11661-14 or

Test lung IngMar QuickLung or equivalent

O), flow rate (LPM), and volume

Service Tools and Supplies

V60 Service Kit, which includes: Respironics P/N 1054291

Adapter, 22-mm OD, both ends Respironics P/N 1002505

Local Supplier

Respironics P/N 1040311 or equivalent

equivalent

Adapter, 25-pin to 9-pin Respironics P/N 1058403

Adapter, torque, cap/collar Respironics P/N 1056005

BiPAP test adapter, 0.25-in. Respironics P/N 332353

Cable, null modem Respironics P/N 1022815

Cable, TTL communications Respironics P/N 1058778

Circuit tube, 18-in. smooth-bore (qty. 2) Respironics P/N 1000060

Coupling, straight, silicone Respironics P/N 500-1000-43

Forceps, locking, red plastic Respironics P/N 1058430

Plug, low-pressure Respironics P/N 1058270

Plug, tapered

Pressure pick-off port (oxygen enrichment attachment SNGL)

Proximal pressure line tubing Respironics P/N 312114

Remote alarm test cable Respironics P/N 1027818

Remote alarm test cable adapter Respironics P/N 1027817

/32 - 61/64 in., silicone (qty. 2) Respironics P/N 1055322

/16 - 3/4 in., silicone Respironics P/N 1055323

Respironics P/N 312710

1049766 Rev A V60 Ventilator Service Manual 1-3

Chapter 1

Introduction and Intended Use

Table 1-1: Recommended Test Equipment, Tools, and Materials

Description Manufacturer and Model

Syringe, system leak test Respironics P/N 1058271

Valve, ball Respironics P/N 1058431

Valve, oxygen/regulator shut-off Respironics P/N 1058380

Whisper Swivel II Respironics P/N 332113

Adapter, USB to serial Respironics P/N 1022895 or equivalent

Cleaning cloth Local supplier

Fitting, system leak test syringe (replacement) Respironics P/N 1060263

Isopropyl alcohol Local supplier

Lubricant, KRYTOX GPL 226 Respironics P/N 1021021 or equivalent

Metric hex key set (rounded ends), 1.5 to 4 mm Local supplier

Mild detergent or antiseptic wipes Local supplier

Needle nose pliers Local supplier

PC or laptop (required for downloading software and capturing diagnostic codes)

Pliers Local supplier

Screwdriver, #0 Phillips Local supplier

Screwdriver, #1 Phillips Local supplier

Screwdriver, #2 Phillips Local supplier

Screwdriver, #3 Phillips Local supplier

Screwdriver, pen size, Phillips Local supplier

Screwdriver, pen size, slotted Local supplier

Socket, deep, 5/16-in. Local supplier

Socket, deep, 9/16-in. Local supplier

Torque driver capable of 11.2 to 283 N cm / 1 to 25 in.-lbf

Torque driver capable of 226 to 1130 N cm/ 20 to 100 in.-lbf

Required: Windows XP operating systems, serial port, and USB port

Local supplier

Vacuum, ESD-safe 3M Model 497-AJM or equivalent

Workstation, antistatic 3M Model 725 or equivalent

1-4 V60 Ventilator Service Manual 1049766 Rev A

Chapter 1

Introduction and Intended Use

1.3 Where to Go for Help

For Technical Support and Customer Service, contact:

USA and Canada: 800-345-6443 or 724-387-4000

Respironics Europe, Africa, Middle East: +33-1-47-52-30-00

Respironics Asia Pacific: +852-3194-2280

Facsimile: +1-724-387-5012

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Chapter 1

Introduction and Intended Use

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1-6 V60 Ventilator Service Manual 1049766 Rev A

Chapter 2. Warnings and Cautions

Before servicing the Respironics V60 ventilator, read and understand this service manual, especially safety considerations. These safety considerations are for reference only, and are not intended to supersede your institution’s protocol for service or safe use of noninvasive ventilation.

The instructions in this manual are primarily reserved for use by a qualified service technician.

WARNING: Alerts the user to the possibility of injury, death, or other serious adverse

reactions associated with the use or misuse of the device.

CAUTION: Alerts the user to the possibility of a problem with the device associated

with its use or misuse, such as device malfunction, device failure, damage to the device, or damage to other property.

NOTE: Emphasizes information of particular importance.

2.1 General WARNING: An alternative means of ventilation shall be available whenever the ventilator

is in use. If a fault is detected in the ventilator, disconnect the patient from it and immediately start ventilation with such a device. The ventilator must be removed from clinical use and serviced by Respironics-authorized service personnel.

WARNING: Use the Respironics V60 ventilator on spontaneously breathing patients only.

It is an assist ventilator and is intended to augment the ventilation of a spontaneously breathing patient. It is not intended to provide the total ventilatory requirements of the patient.

WARNING: We do not recommend you use the Respironics V60 ventilator on patients who

require ventilation at predetermined tidal volumes. The ventilator provides continuous positive airway pressure (CPAP) and positive pressure ventilation (S/T, PCV, and AVAPS) and is indicated for assisted ventilation only. These modes do not provide ventilation with guaranteed tidal volume delivery.

WARNING: We do not recommend you use AVAPS on patients who require rapid and

frequent IPAP adjustments to maintain a consistent tidal volume. AVAPS, a volume targeted mode, changes the IPAP setting in order to achieve the target tidal volume. During AVAPS setup, there may be a period of time before the target tidal volume is achieved. AVAPS is ideal for more stabilized patients.

1049766 Rev A V60 Ventilator Service Manual 2-1

Chapter 2

Warnings and Cautions

WARNING: To reduce the risk of CO2 rebreathing, make sure EPAP pressures and

exhalation times are sufficient to clear all exhaled gas through the exhalation port. In noninvasive ventilation continuous air flow through the port flushes exhaled gases from the circuit. The ability to completely exhaust exhaled gas from the circuit depends on the EPAP setting and I:E ratio. Higher tidal volumes further increase the volume of CO

rebreathed by the patient.

WARNING: To reduce the risk of CO

rebreathing, monitor the patient for changes in

respiratory status at the start of ventilation and with each change in ventilator settings, circuit configuration, or patient condition. Pay attention to ventilator alarms that warn of increased CO

rebreathing risk.

WARNING: Be aware of the possibility of contamination from patient exhalate being

exhausted into the room through the exhalation port.

WARNING: To ensure accuracy of oxygen administration and to monitor for the presence

of contamination (incorrect gas connected), use an external oxygen monitor to verify the oxygen concentration in the delivered gas.

WARNING: To reduce the risk of fire, use the ventilator in well-ventilated areas away from

flammable anesthetics. Do not use in a hyperbaric chamber or other similarly oxygen-enriched environments. Do not use near an open flame.

WARNING: To reduce the risk of electric shock from liquid entering the device, do not put

a container filled with a liquid on the ventilator.

WARNING: To reduce patient risk of hypoxemia, keep free-flowing oxygen away from air

inlet of ventilator.

WARNING: Connect to the ventilator only items that are specified as part of or compatible

with the ventilator system. Additional equipment connected to medical electrical equipment must comply with the respective IEC or ISO standards. Furthermore, all configurations shall comply with the requirements for medical electrical systems (see IEC 60601-1-1 or clause 16 of edition 3 of IEC 60601-1, respectively). Anybody connecting additional equipment to medical electrical equipment configures a medical system and is therefore responsible for ensuring that the system complies with the requirements for medical electrical systems. Also be aware that local laws may take priority over the above mentioned requirements. If in doubt, consult Respironics.

WARNING: To reduce the risk of fire, explosion, leakage, or other hazard, take these

precautions with respect to the battery:

• Do not attempt to disassemble, open, drop, crush, bend or deform, insert foreign objects into, puncture, or shred the battery pack; modify or remanufacture it; immerse or expose it to water or other liquids; expose it to fire, excessive heat (including soldering irons); or put it in a microwave oven.

• Replace the battery only with another battery specified by the manufacturer.

• Follow all instructions for proper use of the battery.

• Do not short-circuit the battery or allow metallic or conductive objects to contact the battery connector housing.

• Use the battery with the Respironics V60 ventilator only.

2-2 V60 Ventilator Service Manual 1049766 Rev A

Chapter 2

Warnings and Cautions

WARNING: The nurse call/remote alarm should be considered a backup to the ventilator’s

primary alarm system.

WARNING: To ensure that the alarm will be heard, make sure the alarm loudness is

adequate and avoid blocking the alarm speakers beneath the ventilator.

CAUTION: Federal law (USA) restricts this device to sale by or on the order of a

physician.

CAUTION: The Respironics V60 ventilator is designed to operate in the temperature

range of 5 to 40 ºC (41 to 104 ºF). To minimize the risk of overheating the device, do not operate adjacent to heaters or other heat sources.

NOTE: The displays shown in this manual may not exactly match what you see on

your own ventilator.

NOTE: Pressures are indicated on the ventilator in cmH2O. Millibars and

hectopascals (hPa) are used by some institutions instead. Since 1 millibar equals 1 hPa, which equals 1.016 cmH used interchangeably.

O, the units may be

NOTE: The ventilator is not intended for use as an ambulance transport ventilator

or as an Automatic Transport Ventilator as described by the American Hospital Association and referenced by the FDA. It is intended to allow the patient to be transported within the hospital setting using a cart to move the ventilator.

NOTE: When attachments or other components or subassemblies are added to

the ventilator breathing system, the pressure gradient across the ventilator breathing system, measured with respect to the ventilator outlet, may increase.

NOTE: The Respironics V60 ventilator parts that have patient contact are free of

latex.

NOTE: If an alarm persists for no apparent reason, discontinue ventilator use and

contact Respironics.

NOTE: If you detect any unexplained changes in the performance or visual

displays of the ventilator, discontinue ventilator use and contact Respironics.

NOTE: The Respironics V60 ventilator does not support automatic record

keeping.

1049766 Rev A V60 Ventilator Service Manual 2-3

Chapter 2

Warnings and Cautions

2.2 Preparing for Ventilation

WARNING: To ensure the correct performance of the ventilator and the accuracy of

patient data, we recommend you use only Respironics-approved accessories with the ventilator.

WARNING: To prevent possible asphyxia and to reduce the risk of CO2 rebreathing, take

these precautions with respect to mask and exhalation port use:

• Use only a mask with an exhalation port or a nasal mask for noninvasive ventilation.

• Do not occlude the exhalation port.

• Turn on the ventilator and verify that the port is operational before application. Pressurized gas from the ventilator should cause a continuous flow of air to exhaust from the leak port, flushing exhaled gas from the circuit.

WARNING: Never leave the mask on the patient while the ventilator is not operating.

When the ventilator is not operating, the exhalation port does not allow sufficient exhaust to eliminate CO rebreathing may occur.

WARNING: To ensure normal air circulation and exchange, do not cover or block the

ports on the ventilator or ventilator circuit. Do not block the air inlet panel on the right side of the ventilator.

WARNING: To prevent possible patient injury and possible water damage to the ventilator,

make sure the humidifier is set to appropriate temperature and humidification settings.

from the circuit. Substantial CO2

WARNING: To prevent the possibility of inadequate humidification, pay close attention to

the humidifier’s functioning when operating the ventilator at an ambient temperature > 30 ºC (86 ºF). The ventilator warms the air delivered to the patient above ambient temperature, which may impair the humidifier’s performance.

WARNING: To reduce the risk that the patient will aspirate condensed water from the

breathing circuit, position any humidifier lower than both the ventilator and the patient.

WARNING: To prevent possible patient injury and equipment damage, do not turn the

humidifier on until the gas flow has started and is regulated. Starting the heater or leaving it on without gas flow for prolonged periods may result in heat build-up, causing a bolus of hot air to be delivered to the patient. Circuit tubing may melt under these conditions. Turn the heater power switch off before stopping gas flow.

WARNING: To reduce the risk of fire, use only patient circuits intended for use in oxygen-

enriched environments. Do not use antistatic or electrically conductive tubing.

WARNING: To prevent patient or ventilator contamination, recommend you use a

Respironics-approved main flow bacteria filter on the patient gas outlet port. Filters not approved by Respironics may degrade system performance.

2-4 V60 Ventilator Service Manual 1049766 Rev A

Chapter 2

Warnings and Cautions

WARNING: To reduce the risk of bacterial contamination or damage, handle bacteria

filters with care.

WARNING: To reduce the risk of strangulation from patient tubing, use a tubing support

arm and secure the proximal pressure line with clips.

WARNING: To reduce the risk of electric shock, connect the ventilator to an AC supply

mains with protective earth only.

WARNING: Do not use extension cords, adapters, or power cords with the ventilator that

are not approved by Respironics.

WARNING: To prevent unintentional disconnection of the power cord, always use the

correct, Respironics-supplied power cord and lock it into place with the power cord retainer before you switch the ventilator on. The retainer is designed to hold the connector end of the Respironics-supplied cord securely in place.

WARNING: To reduce the risk of electric shock, regularly inspect the AC power cord and

verify that it is not frayed or cracked.

WARNING: To reduce the risk of strangulation, route the power cord to avoid

entanglement.

WARNING: To reduce the risk of power failure, pay close attention to the battery’s charge

level. The battery’s operation time is approximate and is affected by ventilator settings, discharge and recharge cycles, battery age, and ambient temperature. Battery charge is reduced at low ambient temperatures or in situations where the alarm is continuously sounding.

WARNING: To ensure the ventilator’s safe operation, always run the full preoperational

check described in the operator’s manual before using the ventilator on a patient. If the ventilator fails any tests, remove it from clinical use immediately. Do not use the ventilator until necessary repairs are completed and all tests have passed.

WARNING: To prevent possible patient injury, disconnect the patient from the ventilator

before running the preoperational check. Make sure another source of ventilatory support is available.

WARNING: To prevent possible patient injury due to nonannunciating alarms, verify the

operation of any remote alarm device before use.

CAUTION: To prevent possible damage to the ventilator, ensure that the connection

to the oxygen supply is clean and unlubricated, and that there is no water in the oxygen supply gas.

CAUTION: For 120 V equipment, grounding reliability can only be achieved when it

is connected to an equivalent receptacle marked “hospital only” or “hospital grade.”

1049766 Rev A V60 Ventilator Service Manual 2-5

Chapter 2

Warnings and Cautions

2.3 Operation WARNING: To prevent possible patient injury, avoid setting alarm limits to extreme

values, which can render the alarm system useless.

2.4 Alarms and Messages

2.5 Care and Maintenance

WARNING: If AC power fails and the backup battery is not installed or is depleted, an

audible and visual alarm annunciates for at least 2 minutes. Immediately discontinue ventilator use and secure an alternative means of ventilation. As in most ventilators with passive exhalation ports, when power is lost, sufficient air is not provided through the circuit and exhaled air may be rebreathed.

WARNING: WARNING: To reduce the risk of electric shock, power down the ventilator and

disconnect it from AC power before cleaning or servicing it.

WARNING: WARNING: To prevent patient or ventilator contamination, inspect and replace

the main flow bacteria filter between patients and at regular intervals (or as stated by the manufacturer).

WARNING: WARNING: To prevent possible patient injury, inspect and verify the proper

operation of the exhalation port regularly during use.

CAUTION: Do not attempt to sterilize or autoclave the ventilator.

CAUTION: To prevent possible damage to the ventilator, use only those cleaning

agents listed in this manual.

CAUTION: To prevent possible damage to the touchscreen, take care when cleaning

it. Do not drip water and/or soap solution. After cleaning and rinsing, remove all moisture with a dry, soft cloth. Never clean the touchscreen with an abrasive brush or device, since this will cause irreparable damage.

CAUTION: To avoid introducing foreign matter into the ventilator and to ensure

proper system performance, change the air inlet filter at regular intervals (or as stipulated by your institution).

CAUTION: To ensure proper system performance, use a Respironics-approved air

inlet filter.

CAUTION: Because some environments cause a quicker collection of lint and dust

than others, inspect the filters more often when needed. The air inlet filter should be replaced; the cooling fan filter should be cleaned.

CAUTION: To prevent possible damage to the ventilator, always ship it with the

original packing material. If the original material is not available, contact Respironics to order replacements.

2-6 V60 Ventilator Service Manual 1049766 Rev A

Chapter 2

Warnings and Cautions

2.6 First-Time Installation

2.7 Communications Interface

WARNING: Never attempt to disconnect or reconnect the battery during operation.

CAUTION: To prevent possible damage to the ventilator, always secure it to its stand

or securely place it on a flat, stable surface that is free of dirt and debris. Do not use the ventilator adjacent to, or stack it with, other equipment.

WARNING: Connect to the ventilator only items that are specified as part of or compatible

WARNING: It is the responsibility of the end user to validate the compatibility and use of

information transmitted from the ventilator with the device to be connected to the ventilator.

WARNING: The data provided through the communications interface is for reference only.

Decisions for patient care should be based on the clinician’s observations of the patient.

WARNING: To prevent possible patient injury due to nonannunciating alarms, verify the

operation of any remote alarm device before use.

WARNING: To ensure the functionality of the remote alarm, connect only Respironics-

approved cables to the remote alarm port.

CAUTION: The remote alarm port is intended to connect only to an SELV (safety

extra-low voltage and ungrounded system with basic insulation to ground), in accordance with IEC 60601-1. To prevent damage to the remote alarm, make sure the signal input does not exceed the maximum rating of 24 VAC or 36 VDC at 500 mA with a minimum current of

1 mA.

2.8 Diagnostic Mode WARNING: To prevent possible patient injury, do not enter the diagnostic mode while a

patient is connected to the ventilator. Verify that the patient is disconnected before proceeding.

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2-8 V60 Ventilator Service Manual 1049766 Rev A

Chapter 3. Theory of Operation

The V60 ventilator is a microprocessor-controlled gas flow control and monitoring system that can deliver air and oxygen to augment or replace the work normally performed by the patient’s respiratory system. The ventilator uses electromechanical control circuits, flow and pressure monitors, and software programs to deliver pressure controlled breaths.

The ventilator includes a user interface (UI), internal blower, and gas delivery subsystem (GDS) that mixes air and oxygen. The ventilator can operate from a 40 to 87 psig (276 to 600 kPa) medical grade oxygen source for enriched oxygen operation. The internal power supply that can operate from mains (100 to 240 V AC 50/60 Hz) or internal battery (14.4 V DC) power. The ventilator also includes several communications interfaces.

Schematic diagrams of the V60 ventilator are available upon request.

3.1 Pneumatics The pneumatic subsystem delivers and monitors pressurized gas to the patient

in response to commands from the CPU subsystem. The pneumatic subsystem includes the:

•Manifold

•Blower

• Oxygen solenoid valve

• Air and oxygen flow sensors

• Pressure transducers

• Solenoid valves

• Motor controller (MC) PCBA

• Data acquisition (DA) PCBA

The ventilator uses ambient air and high-pressure oxygen. Air enters through an inlet filter. Oxygen enters though a high-pressure inlet, and a proportional valve provides the operator-set concentration. The system mixes the air and oxygen, pressurizes it in the blower, and then regulates it to the user-set pressure. To do this, the ventilator compares the proximal (patient) pressure measurement with the ventilator outlet (machine) pressure, and adjusts the machine pressure to compensate for the pressure drop across the inspiratory filter, patient circuit, and humidifier. This helps ensure accurate and responsive pressure delivery and leak compensation.

The ventilator delivers gas to the patient through a main flow (inspiratory) bacteria filter, a single-limb patient breathing circuit, a humidification device (optional), and a patient interface such as a mask or ET tube. A pressure tap

1049766 Rev A V60 Ventilator Service Manual 3-1

Chapter 3: Theory of Operation

Air inlet

filter

Ambient air

inlet

proximal to the patient is used to monitor patient pressure. The internal exhalation port continually clears gas from the ventilator airway to ensure delivery of an accurate oxygen mixture.

Figure 3-1 shows a pneumatic schematic of the V60 ventilator.

Proximal

pressure sensor

Machine

pressure sensor

Ambient pressure

Bypass

element

Machine pressure

line

Purge

solenoid

Ambient pressure

High pressure

oxygen inlet

O2 inlet filter

O2 inlet

pressure

Air inlet

Proportional

solenoid valve

Air flow

sensor

Mixing

air & O

Sintered flow

normalizers

O2 flow

sensor

Bypass

element

Blower

Internal exhalation port

Figure 3-1: V60 Ventilator Pneumatic Subsystem Schematic

3.1.1 Air Inlet

Ambient air is entrained through the air inlet.

3.1.2 Air Inlet Filter

Patient port

Barometric

pressure sensor

Proximal pressure

Ambient pressure

The air inlet filter is designed to filter 5-micron particles at 70% efficiency at 150 SLPM flow.

Air inlet filter

3-2 V60 Ventilator Service Manual 1049766 Rev A

Manifold

Air flow sensor

Chapter 3: Theory of Operation

3.1.3 Air Flow Sensor

The air flow sensor measures a subset (bypass flow) of total flow in the pneumatic air path and interpolates the measurements according to constants that are calculated during gas delivery subsystem (GDS) calibration. The air flow sensor also helps provide closed-loop control of gas flow during oxygen blending.

3.1.4 Machine and Proximal Pressure Transducers

The machine and proximal pressure transducers on the DA PCBA measure the machine and proximal pressure over a range of -20 to +65 cmH

3.1.5 Barometric Pressure Transducer

The barometric pressure transducer on the DA PCBA measures barometric pressure over a range of 525 to 850 mmHg.

3.1.6 Oxygen Pressure Transducer

The oxygen pressure transducer on the DA PCBA measures inlet pressure over

Oxygen pressure transducer

Machine pressure transducer

DA PCBA

a range of 0 to 87 psig. An alarm results if oxygen supply pressure is below 40 psig (276 kPa) or above 92 psig (634 kPa).

Proximal pressure transducer

Barometric pressure transducer

1049766 Rev A V60 Ventilator Service Manual 3-3

Chapter 3: Theory of Operation

Oxygen filter element

Manifold

Oxygen inlet filter

Manifold

Oxygen breather vent

3.1.7 Manifold, Oxygen Inlet Filter, Filter Element

The manifold includes a connection for the oxygen inlet, allowing countryspecific oxygen connections to be attached to the manifold. The manifold provides the pneumatic interfaces to the air inlet, oxygen inlet, blower inlet, and proximal and machine pressure lines.

The oxygen inlet filter removes 5-micron particles from the oxygen gas supply. A 40-micron sintered bronze filter element acts to reduce turbulence in the oxygen flow. The 40-micron oxygen breather vent reduces noise in the oxygen flow.

3.1.8 Oxygen Solenoid Valve

The oxygen solenoid valve and valve driver circuitry control the flow of oxygen according to the set O there is a loss of power or system reset.

and flow. The oxygen solenoid valve is closed when

Manifold

Oxygen flow sensor

Oxygen solenoid valve

Blower

3.1.9 Oxygen Flow Sensor

The oxygen flow sensor measures a subset (bypass flow) of the total flow. These measurements are interpolated according to constants that are calculated during GDS calibration. Together, the oxygen solenoid valve and flow sensor provide closed-loop control for delivered oxygen flow.

3.1.10 Blower

The blower is controlled by the MC PCBA, and generates flow and pressure for the system. The blower includes an impeller, housing, and a three-phase brushless DC motor. The blower delivers a maximum pressure of less than 125 cmH

O in a dead-head condition, can accelerate from 10,000 to 22,500

revolutions per minute (RPM) in 120 msec from a nominal 5- to 25-cmH pressure rise. Maximum motor speed is approximately 40,000 RPM. The blower motor has internal Hall Effect sensors that are monitored by the MC PCBA and measure impeller speed.

3-4 V60 Ventilator Service Manual 1049766 Rev A

3.1.11 Solenoid Valves

Chapter 3: Theory of Operation

Manifold

Solenoid valves (x4)

Four solenoid valves are mounted on the manifold and controlled by the DA PCBA. These three-way autozero solenoids include SOL1 (purge solenoid), SOL2 and SOL4 (machine pressure autozero solenoids), and SOL3 and SOL4 (proximal pressure autozero solenoids).

Solenoid valves

SOL2, SOL4: Machine pressure autozero solenoids.

SOL1: Purge solenoid, uses the machine pressure line to purge the proximal pressure line.

SOL3, SOL4: Proximal pressure autozero solenoids. SOL4: Also connects machine pressure to the proximal pressure transducer during autozero.

1049766 Rev A V60 Ventilator Service Manual 3-5

Chapter 3: Theory of Operation

3.2 Electronics The electronics system provides software-based control and monitoring, power

management, user input, display, subsystem I/O, external communication, and alarms. The electronics system includes a Cirrus EP9307 microcontroller for control and monitor processing.

Control tasks include breath delivery, patient data calculation, and alarm detection/response. Monitoring tasks include controlling the LCD, front panel keys and indicators, inputs, and primary alarm output. An independent watchdog control provides safety monitoring.

The electronics system includes:

• Power management (PM) PCBA

• Power supply

• Internal battery

• CPU PCBA

• Motor controller (MC) PCBA

• Data acquisition (DA) PCBA

• Flow sensors

• User interface

• Liquid crystal display (LCD)

• Backlight inverter PCBA

• Touch screen assembly

• Nav-ring assembly

• Power switch overlay

• Switch PCB

• User interface (UI) PCBA

3-6 V60 Ventilator Service Manual 1049766 Rev A

PM PCBA

Power supply

Chapter 3: Theory of Operation

3.2.1 Power management (PM) PCBA

• Battery charging and management circuitry

• Internal supply voltages (supply voltages: 3.3 V, 5 V, 12 V, 35 V).

• Fan power and tach monitoring.

• Backup alarm control circuitry, including power fail detection.

• Power switch control circuitry.

• System alarm and reset management.

• Electrical interfaces between the CPU PCBA, LCD, and the user interface (UI) PCBA.

• Includes an EEPROM for calibration data, board identification information, and PM PCBA power-on hours.

3.2.2 Power Supply

• Provides ventilator and battery recharging power from AC line voltage.

• Converts AC line voltage (100 to 240 VAC, 50 to 60 Hz) into 24 VDC power.

• Includes input over-current, output over-voltage, and output currentlimiting protection.

Internal battery

3.2.3 Internal Battery

• 14.4-V, 11.5-Ah lithium-ion battery has a run-time of at least six hours under normal conditions.

• Provides operating power when AC power is not available.

• Provides charge and temperature status to the PM PCBA.

• Internal circuitry monitors battery status, provides self-contained fault control features, and communicates this information to the PM PCBA.

1049766 Rev A V60 Ventilator Service Manual 3-7

Chapter 3: Theory of Operation

CPU PCBA

3.2.4 CPU PCBA

• Microprocessor: once in a run state, the microprocessor can only be reset by a watchdog timeout or out-of-specification power condition. Monitors operation of the ventilator and controls delivery of air and oxygen to the patient. Verifies safe ventilator operation.

• Flash memory: 8 MB program storage.

• RAM: 8 MB for program execution and volatile data storage.

• EEPROM: 4 KB of storage for board-specific information (including operating hours, time since last service, serial numbers, part numbers, and software and hardware revisions).

• Watchdog timer: disables the blower and oxygen flow if not strobed by software within a predefined time window that is independent of the CPU master clock. In addition, ensures that software is operating.

• Real-time clock (RTC): a time of day clock that provides the date and time to the ventilator, and is powered by a dedicated 3-V lithium coin cell battery.

• LCD interface supports a display of 1024 horizontal x 768 vertical pixels in 256 colors with a refresh rate of at least 50 Hz. The CPU PCBA controls LCD brightness by varying a control voltage over a range of 0 to 3.5 V (minimum to maximum brightness).

• Touch screen interface supports a five-wire type touch screen.

• Nav-ring rotary adjustment interface with a minimum resolution of 24 ticks per revolution.

• User key switches: interfaces to front panel keys.

• Alarm subsystem: includes a speaker driver circuit for the two main speakers, a backup piezo alarm, and a three-wire relay-controlled remote alarm interface (normal open, NO, or normal closed, NC) on the ventilator back panel.

• Blower speed monitor measures blower speeds from 3,000 to 50,000 RPM with 2% accuracy.

• Electrical interfaces to the power management (PM) and motor controller (MC) PCBAs.

• Two USB ports and an ethernet connection are designed for future enhancements. Table 3-1 summarizes hospital information system (HIS) RS-232 port pinout.

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