Covidien WarmTouch User manual

Service Manual
WarmTouch™
Convective Warming Unit

COVIDIEN, COVIDIEN with logo, and Covidien logo are U.S. and internationally registered
trademarks of Covidien AG. Other brands are trademarks of a Covidien company.
©2013 Covidien.

Service Manual i
Table of Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
1.2 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.2.1 Safety Symbol Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.2.2 Warnings (Service) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.2.3 Cautions (Service) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
1.2.4 Warnings (Patient Treatment) . . . . . . . . . . . . . . . . . . . . . . . .1-4
1.2.5 Cautions (Patient Treatment) . . . . . . . . . . . . . . . . . . . . . . . . .1-6
1.3 ESD (Electrostatic Discharge) Precautions . . . . . . . . . . . . . . . . . . .1-7
1.4 Tools Required for Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
1.5 Serial Number, Software Version, and Error Codes . . . . . . . . . . . .1-9
1.6 Component Disposal - WEEE Directive . . . . . . . . . . . . . . . . . . . .1-11
1.7 Labeling Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12
1.8 Obtaining Technical Assistance . . . . . . . . . . . . . . . . . . . . . . . . . .1-14
1.9 Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-17
1.10 Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-17
2 Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
2.2 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
2.2.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
2.2.2 Indications for Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
2.2.3 Contraindications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
2.2.4 Covidien WarmTouch™ Warming Blankets . . . . . . . . . . . . . .2-2
2.3 Product Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
2.3.1 Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
2.3.2 Back View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
2.4 Operator’s Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
3.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
3.2 Safety Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
3.3 Attaching the Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
3.4 Installing the Warming Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
3.4.1 IV Pole Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
3.4.2 Bed Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
3.4.3 Cart Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9

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4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
4.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
4.2 Safety Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
4.3 Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
4.4 Overview of Warming Unit Operating Modes . . . . . . . . . . . . . . . .4-3
4.5 Beginning Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
4.6 Controlling the Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
4.6.1 Using Boost Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
4.6.2 Using the Heat Off Setting . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
4.6.3 Returning to Ready Mode . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
4.6.4 Returning to Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . .4-8
4.6.5 If Power is Interrupted... . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
4.7 Powering Off the Warming Unit . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
5 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
5.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
5.2 Safety Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
5.3 Cleaning the Warming Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
5.4 Safety Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
5.4.1 Physical Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
5.4.2 Temperature and Alarm Verification . . . . . . . . . . . . . . . . . . .5-3
5.4.3 Electrical Safety Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
5.5 Filter Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
5.6 Monitoring the Filter Status . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-10
6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
6.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
6.2 Safety Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
6.3 Principles of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
6.3.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
6.3.2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
6.3.3 Component Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-4
6.3.4 Component Cable Connections . . . . . . . . . . . . . . . . . . . . . .6-8
6.4 Basic Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-9
6.5 Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-12
7 Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
7.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
7.2 Safety Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
7.3 Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
7.4 Service Screen Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2

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7.5 Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-3
7.5.1 Power-On Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-3
7.5.2 Keypad Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-5
7.5.3 Display Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-7
7.5.4 Temperature Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . .7-8
7.5.5 Flow Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-10
7.5.6 Thermostat Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-11
7.6 Electrical Safety Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-14
7.6.1 Ground Bond Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-14
7.6.2 Earth Leakage Current Test (Line Leakage) . . . . . . . . . . . . .7-14
7.6.3 Enclosure Leakage Current Test (Line Leakage) . . . . . . . . . .7-14
8 External Component Replacement . . . . . . . . . . . . . . . . . . . . . . . . .8-1
8.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
8.2 Safety Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
8.3 Pole Clamp Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-2
8.4 USB Port Cover Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-4
8.5 Power Cord Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-5
8.6 Nozzle Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-8
8.7 Nozzle Strap with Clip Replacement . . . . . . . . . . . . . . . . . . . . . .8-10
8.8 No Free-Hosing Label Replacement . . . . . . . . . . . . . . . . . . . . . . .8-11
9 Accessing the Inside of the Warming Unit . . . . . . . . . . . . . . . . . .9-1
9.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
9.2 Safety Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
9.3 Separating the Front and Rear Enclosures . . . . . . . . . . . . . . . . . . .9-2
9.4 Rejoining the Front and Rear Enclosures . . . . . . . . . . . . . . . . . . . .9-5
10 Internal Component Replacement (Inside Front Enclosure) . . .10-1
10.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1
10.2 Safety Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-2
10.3 Keypad Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-3
10.4 Display (LCD) Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-8
10.5 User Interface (UI) PCBA Replacement . . . . . . . . . . . . . . . . . .10-12
10.6 Ribbon Cable Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . .10-19
10.7 USB Cable Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-22
10.8 Clock Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . .10-29
10.9 Power PCBA Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . .10-31
10.10 Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-35
10.11 Speaker Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-37
10.12 Speaker Cable Replacement . . . . . . . . . . . . . . . . . . . . . . . . .10-40

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10.13 Power Supply Replacement . . . . . . . . . . . . . . . . . . . . . . . . .10-43
10.14 Power Supply Output Cable Replacement . . . . . . . . . . . . . . .10-46
10.15 Ground Cable Replacement . . . . . . . . . . . . . . . . . . . . . . . . .10-48
10.16 AC Power Inlet Replacement . . . . . . . . . . . . . . . . . . . . . . . .10-51
10.17 Equipotential Stud Replacement . . . . . . . . . . . . . . . . . . . . . .10-55
11 Internal Component Replacement (Inside Rear Enclosure) . . .11-1
11.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-1
11.2 Safety Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-2
11.3 Thermistor Sensor Assembly Replacement . . . . . . . . . . . . . . . .11-3
11.4 Thermostat Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-9
11.5 Thermostat Cable Replacement . . . . . . . . . . . . . . . . . . . . . . .11-14
11.6 Pole Clamp and Mounting Bolt Replacement . . . . . . . . . . . . .11-18
11.7 Hose Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-21
11.8 Hose Duct Adapter Replacement . . . . . . . . . . . . . . . . . . . . . .11-25
11.9 Fan Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . .11-33
11.10 Heater Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . .11-43
12 Enclosure Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-1
12.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-1
12.2 Safety Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-1
12.3 Front Enclosure Replacement . . . . . . . . . . . . . . . . . . . . . . . . . .12-2
12.4 Filter Enclosure Replacement . . . . . . . . . . . . . . . . . . . . . . . . .12-12
12.5 Rear Enclosure Replacement . . . . . . . . . . . . . . . . . . . . . . . . . .12-15
13 Product Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-1
13.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-1
13.2 Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-1
13.2.1 Warming Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-1
13.2.2 Transport Cart (Optional) . . . . . . . . . . . . . . . . . . . . . . . . .13-1
13.3 Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-2
13.4 Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .13-2
13.4.1 Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-2
13.4.2 Shipping and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-2
13.5 Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-3
13.6 Product Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-3
13.7 Electromagnetic Compatibility (EMC) . . . . . . . . . . . . . . . . . . . .13-4
13.7.1 Manufacturer’s Declaration . . . . . . . . . . . . . . . . . . . . . . . .13-4
13.7.2 Electromagnetic Emissions . . . . . . . . . . . . . . . . . . . . . . . . .13-4
13.7.3 Electromagnetic Immunity . . . . . . . . . . . . . . . . . . . . . . . . .13-5

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14 Packing for Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-1
14.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-1
14.2 Returning the Warming Unit to Covidien . . . . . . . . . . . . . . . . .14-1
14.3 Packing in the Original Carton . . . . . . . . . . . . . . . . . . . . . . . . .14-2
14.4 Packing in a Different Carton . . . . . . . . . . . . . . . . . . . . . . . . . .14-4
A Parts and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
A.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
A.2 External Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
A.3 Internal Components (Inside Front Enclosure) . . . . . . . . . . . . . . . A-3
A.4 Internal Components (Inside Rear Enclosure) . . . . . . . . . . . . . . . A-5
A.5 Enclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
A.6 Miscellaneous Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
A.7 Parts Locator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
B Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
B.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1
B.2 Error Codes and Suggested Resolutions . . . . . . . . . . . . . . . . . . . .B-2
C Service Test Data Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
C.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index-1

Page Left Intentionally Blank
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Service Manual vii
Figures
1 Introduction
Figure 1-1 Serial Number Label on Back of Warming Unit . . . . . . . . . . . .1-9
Figure 1-2 Menu Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Figure 1-3 System Information Screen . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
2 Product Overview
Figure 2-1 Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Figure 2-2 Back View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Figure 2-3 Operator’s Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
3 Installation
Figure 3-1 Positioning the Unit for Power Cord Installation . . . . . . . . . . .3-2
Figure 3-2 Power Cord Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Figure 3-3 Power Cord Wrapped and Secured . . . . . . . . . . . . . . . . . . . .3-4
Figure 3-4 Back View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Figure 3-5 Warming Unit Mounted on IV Pole . . . . . . . . . . . . . . . . . . . . .3-7
Figure 3-6 Bed Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Figure 3-7 Back View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
Figure 3-8 Cart Mounting Peg and Warming Unit Mounting Hole . . . . .3-10
Figure 3-9 Warming Unit Mounted on Cart . . . . . . . . . . . . . . . . . . . . . .3-11
4 Operation
Figure 4-1 Main Screen at Power-On . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Figure 4-2 Replace Filter Screen at Power-On . . . . . . . . . . . . . . . . . . . . . .4-4
Figure 4-3 Warming System Set to 40°C (Medium) . . . . . . . . . . . . . . . . .4-6
Figure 4-4 Warming System Set to Boost Mode . . . . . . . . . . . . . . . . . . . .4-6
Figure 4-5 Warming System Set to Heat Off . . . . . . . . . . . . . . . . . . . . . .4-7
Figure 4-6 Warming System Set to Ready Mode . . . . . . . . . . . . . . . . . . .4-7
5 Maintenance
Figure 5-1 Replace Filter Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
Figure 5-2 Filter Enclosure and Power Cord Connection . . . . . . . . . . . . . .5-5
Figure 5-3 HEPA Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Figure 5-4 Gasket inside Filter Enclosure . . . . . . . . . . . . . . . . . . . . . . . . .5-7
Figure 5-5 Replace Filter Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-8
Figure 5-6 Filter Information Screen - Filter Expired . . . . . . . . . . . . . . . . .5-8
Figure 5-7 Main Screen at Power-On . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-9
Figure 5-8 Power Cord Wrapped and Secured . . . . . . . . . . . . . . . . . . . .5-9

viii Service Manual
Figure 5-9 Menu Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-10
Figure 5-10 Filter Information Screen . . . . . . . . . . . . . . . . . . . . . . . . . . .5-11
6 Troubleshooting
Figure 6-1 Warming Unit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . .6-3
Figure 6-2 Cable Connections Between Major Components . . . . . . . . . .6-8
Figure 6-3 Low-Priority Alarm (Left) and Medium-Priority Alarm (Right) .6-12
7 Performance Verification
Figure 7-1 Key Code Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
Figure 7-2 Main Screen at Power-On . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-4
Figure 7-3 Replace Filter Screen at Power-On . . . . . . . . . . . . . . . . . . . . . .7-4
Figure 7-4 Position of Hose for Temperature Accuracy Test . . . . . . . . . . .7-8
Figure 7-5 Position of Hose for Flow Test . . . . . . . . . . . . . . . . . . . . . . . .7-10
Figure 7-6 Menu Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-11
Figure 7-7 Key Code Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-11
Figure 7-8 Select Test Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-12
Figure 7-9 Thermostat Test Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-12
8 External Component Replacement
Figure 8-1 Pole Clamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-2
Figure 8-2 Pole Clamp Foot and Knob . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
Figure 8-3 USB Port Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-4
Figure 8-4 Power Cord Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-5
Figure 8-5 Power Cord Wrapped and Secured . . . . . . . . . . . . . . . . . . . . .8-7
Figure 8-6 Nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-8
Figure 8-7 Nozzle Clips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-9
Figure 8-8 Nozzle Strap with Clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-10
Figure 8-9 No Free-Hosing Labels on Front Enclosure (L) and Nozzle (R) .8-11
9 Accessing the Inside of the Warming Unit
Figure 9-1 Separated Enclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-2
Figure 9-2 Power Cord Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-3
Figure 9-3 Enclosure Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-4
Figure 9-4 Rejoining the Enclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-5
Figure 9-5 Power Cord Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-6
Figure 9-6 Power Cord Wrapped and Secured . . . . . . . . . . . . . . . . . . . . .9-7
10 Internal Component Replacement (Inside Front Enclosure)
Figure 10-1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-3
Figure 10-2 Keypad Cable Connection on UI PCBA . . . . . . . . . . . . . . . .10-4

Service Manual ix
Figure 10-3 Removing the Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-5
Figure 10-4 Feeding the Keypad Cable Through the Access Slot . . . . . .10-6
Figure 10-5 Aligning the Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-6
Figure 10-6 Keypad Cable Secured by Locking Bar . . . . . . . . . . . . . . . . .10-7
Figure 10-7 Display behind UI PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . .10-8
Figure 10-8 Display Cable Connection on UI PCBA . . . . . . . . . . . . . . . .10-9
Figure 10-9 Positioning the Display . . . . . . . . . . . . . . . . . . . . . . . . . . .10-10
Figure 10-10 UI PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-12
Figure 10-11 UI PCBA Connections . . . . . . . . . . . . . . . . . . . . . . . . . . .10-14
Figure 10-12 USB Connection on UI PCBA . . . . . . . . . . . . . . . . . . . . . .10-15
Figure 10-13 Attaching Backing Plate and Cable Tie to UI PCBA . . . . .10-16
Figure 10-14 Keypad Cable Secured by Locking Bar . . . . . . . . . . . . . . .10-18
Figure 10-15 Ribbon Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-19
Figure 10-16 Ribbon Cable Connections . . . . . . . . . . . . . . . . . . . . . . .10-20
Figure 10-17 USB Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-22
Figure 10-18 USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-23
Figure 10-19 UI PCBA Connections . . . . . . . . . . . . . . . . . . . . . . . . . . .10-24
Figure 10-20 USB Connection on UI PCBA . . . . . . . . . . . . . . . . . . . . . .10-25
Figure 10-21 Attaching Backing Plate and Cable Tie to UI PCBA . . . . .10-26
Figure 10-22 Keypad Cable Secured by Locking Bar . . . . . . . . . . . . . . .10-28
Figure 10-23 Clock Battery on UI PCBA . . . . . . . . . . . . . . . . . . . . . . . .10-29
Figure 10-24 Power PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-31
Figure 10-25 Power PCBA Connections . . . . . . . . . . . . . . . . . . . . . . . .10-33
Figure 10-26 Fuses on Power PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . .10-35
Figure 10-27 Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-37
Figure 10-28 Speaker Cable Connections . . . . . . . . . . . . . . . . . . . . . .10-38
Figure 10-29 Speaker Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-40
Figure 10-30 Speaker Cable Connections . . . . . . . . . . . . . . . . . . . . . .10-41
Figure 10-31 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-43
Figure 10-32 Power Supply Connections . . . . . . . . . . . . . . . . . . . . . . .10-44
Figure 10-33 Power Supply Output Cable . . . . . . . . . . . . . . . . . . . . . .10-46
Figure 10-34 Power Supply Output Cable Connections . . . . . . . . . . . .10-47
Figure 10-35 Ground Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-48
Figure 10-36 Ground Cable Terminal on Equipotential Stud . . . . . . . .10-49
Figure 10-37 AC Power Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-51
Figure 10-38 AC Power Inlet Connections . . . . . . . . . . . . . . . . . . . . . .10-52
Figure 10-39 Equipotential Stud Connections . . . . . . . . . . . . . . . . . . .10-53
Figure 10-40 Equipotential Stud . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-55
Figure 10-41 Equipotential Stud Connections . . . . . . . . . . . . . . . . . . .10-56
Figure 10-42 Equipotential Stud and Washer . . . . . . . . . . . . . . . . . . . .10-57

x Service Manual
11 Internal Component Replacement (Inside Rear Enclosure)
Figure 11-1 Thermistor Sensor Assembly . . . . . . . . . . . . . . . . . . . . . . . .11-3
Figure 11-2 Thermistor Wire and Rivet . . . . . . . . . . . . . . . . . . . . . . . . . .11-4
Figure 11-3 Thermistor Cable Connections . . . . . . . . . . . . . . . . . . . . . .11-5
Figure 11-4 Attaching Rivet to Thermistor Wire . . . . . . . . . . . . . . . . . . .11-6
Figure 11-5 Inserting Thermistor Wire and Rivet . . . . . . . . . . . . . . . . . .11-6
Figure 11-6 Thermistor Position Inside Hose Duct Adapter . . . . . . . . . . .11-7
Figure 11-7 Inserting the Hose Duct Adapter . . . . . . . . . . . . . . . . . . . . .11-7
Figure 11-8 Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-9
Figure 11-9 Thermostat Cable Connection to Thermostat . . . . . . . . . .11-10
Figure 11-10 Thermostat Rivets (Outside of Hose Duct Adapter) . . . . .11-11
Figure 11-11 Thermostat Rivets (Inside of Hose Duct Adapter) . . . . . . .11-12
Figure 11-12 Inserting the Hose Duct Adapter . . . . . . . . . . . . . . . . . . .11-12
Figure 11-13 Thermostat Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-14
Figure 11-14 Thermostat Cable Connection to Power PCBA . . . . . . . .11-15
Figure 11-15 Thermostat Cable Connection to Thermostat . . . . . . . . .11-16
Figure 11-16 Pole Clamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-18
Figure 11-17 Pole Clamp Foot and Knob . . . . . . . . . . . . . . . . . . . . . . .11-19
Figure 11-18 Pole Clamp Mounting Bolt . . . . . . . . . . . . . . . . . . . . . . .11-20
Figure 11-19 Hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-21
Figure 11-20 Wire Attaching Hose to Hose Duct Adapter . . . . . . . . . .11-22
Figure 11-21 Inserting Hose Duct Adapter . . . . . . . . . . . . . . . . . . . . . .11-23
Figure 11-22 Hose Duct Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-25
Figure 11-23 Thermistor Wire and Rivet . . . . . . . . . . . . . . . . . . . . . . . .11-26
Figure 11-24 Thermostat Cable Connection to Thermostat . . . . . . . . .11-27
Figure 11-25 Wire Attaching Hose to Hose Duct Adapter . . . . . . . . . .11-28
Figure 11-26 Thermostat Rivets (Outside of Hose Duct Adapter) . . . . .11-29
Figure 11-27 Thermostat Rivets (Inside of Hose Duct Adapter) . . . . . . .11-30
Figure 11-28 Inserting the Hose Duct Adapter . . . . . . . . . . . . . . . . . . .11-31
Figure 11-29 Inserting Thermistor Wire and Rivet . . . . . . . . . . . . . . . .11-32
Figure 11-30 Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-33
Figure 11-31 USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-34
Figure 11-32 Filter Enclosure and Screws . . . . . . . . . . . . . . . . . . . . . . .11-35
Figure 11-33 Power PCBA Connections . . . . . . . . . . . . . . . . . . . . . . . .11-36
Figure 11-34 Fan Assembly Screws . . . . . . . . . . . . . . . . . . . . . . . . . . .11-37
Figure 11-35 Cable Tie Securing Fan Cable to Thermistor Cable . . . . .11-38
Figure 11-36 Position of Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . .11-39
Figure 11-37 Inserting the Hose Duct Adapter . . . . . . . . . . . . . . . . . . .11-40
Figure 11-38 Securing the Hose Duct Adapter . . . . . . . . . . . . . . . . . . .11-40
Figure 11-39 USB Connector in Rear Enclosure . . . . . . . . . . . . . . . . . .11-41
Figure 11-40 Heater Assembly (below Fan Assembly) . . . . . . . . . . . . . .11-43

Service Manual xi
Figure 11-41 USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-44
Figure 11-42 Filter Enclosure and Screws . . . . . . . . . . . . . . . . . . . . . . .11-45
Figure 11-43 Power PCBA Connections . . . . . . . . . . . . . . . . . . . . . . . .11-46
Figure 11-44 Fan Assembly Screws . . . . . . . . . . . . . . . . . . . . . . . . . . .11-47
Figure 11-45 Fan Assembly and Hose Duct Adapter . . . . . . . . . . . . . . .11-48
Figure 11-46 Fan Assembly Pulled for Heater Replacement . . . . . . . . .11-49
Figure 11-47 Heater Assembly and Gasket . . . . . . . . . . . . . . . . . . . . .11-50
Figure 11-48 Routing of Heater Wires . . . . . . . . . . . . . . . . . . . . . . . . .11-51
Figure 11-49 Inserting the Hose Duct Adapter . . . . . . . . . . . . . . . . . . .11-52
Figure 11-50 Securing the Hose Duct Adapter . . . . . . . . . . . . . . . . . . .11-52
Figure 11-51 USB Connector in Rear Enclosure . . . . . . . . . . . . . . . . . .11-53
Figure 11-52 Routing of Cables around Fan Assembly . . . . . . . . . . . . .11-54
12 Enclosure Replacement
Figure 12-1 Front Enclosure – Components to be Removed/Reinstalled .12-2
Figure 12-2 Equipotential Stud Connections . . . . . . . . . . . . . . . . . . . . .12-3
Figure 12-3 AC Power Inlet Connections . . . . . . . . . . . . . . . . . . . . . . . .12-4
Figure 12-4 Power Supply Connections . . . . . . . . . . . . . . . . . . . . . . . . .12-5
Figure 12-5 Speaker Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-6
Figure 12-6 Power PCBA Connections . . . . . . . . . . . . . . . . . . . . . . . . . .12-7
Figure 12-7 UI PCBA Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-8
Figure 12-8 Keypad Cable Secured by Locking Bar . . . . . . . . . . . . . . . . .12-9
Figure 12-9 Filter Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-12
Figure 12-10 Power Cord Wrapped and Secured . . . . . . . . . . . . . . . . .12-14
Figure 12-11 Rear Enclosure (Outside) – Components to be
Removed/Reinstalled . . . . . . . . . . . . . . . . . . . . . . . . . . .12-15
Figure 12-12 Rear Enclosure (Inside) – Components to be
Removed/Reinstalled . . . . . . . . . . . . . . . . . . . . . . . . . . .12-16
Figure 12-13 USB Connector and Screws . . . . . . . . . . . . . . . . . . . . . . .12-18
Figure 12-14 Filter Enclosure and Power Cord Connection . . . . . . . . . .12-19
Figure 12-15 Power PCBA Connections . . . . . . . . . . . . . . . . . . . . . . . .12-20
Figure 12-16 Cable Ties to be Removed from Rear Enclosure . . . . . . . .12-21
Figure 12-17 Fan Assembly Screws . . . . . . . . . . . . . . . . . . . . . . . . . . .12-22
Figure 12-18 Heater Assembly and Gasket . . . . . . . . . . . . . . . . . . . . .12-23
Figure 12-19 Pole Clamps and Mounting Bolts . . . . . . . . . . . . . . . . . .12-24
Figure 12-20 Serial Number Label . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-25
Figure 12-21 Cable Tie Mount for Thermistor Cable . . . . . . . . . . . . . .12-25
Figure 12-22 Position of Heater Cone and Screen . . . . . . . . . . . . . . . .12-26
Figure 12-23 Routing of Heater Wires . . . . . . . . . . . . . . . . . . . . . . . . .12-27
Figure 12-24 Position of Hose Duct Adapter . . . . . . . . . . . . . . . . . . . .12-28
Figure 12-25 Inserting the Hose Duct Adapter . . . . . . . . . . . . . . . . . . .12-29

xii Service Manual
Figure 12-26 Securing the Hose Duct Adapter . . . . . . . . . . . . . . . . . . .12-29
Figure 12-27 USB Connector in Rear Enclosure . . . . . . . . . . . . . . . . . .12-30
Figure 12-28 Thermistor Cable Secured . . . . . . . . . . . . . . . . . . . . . . . .12-31
Figure 12-29 Cable Ties and Routing of Cables . . . . . . . . . . . . . . . . . .12-32
Figure 12-30 Serial Number Label . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-33
14 Packing for Shipment
Figure 14-1 Packing in the Original Carton . . . . . . . . . . . . . . . . . . . . . .14-3
A Parts and Accessories
Figure A-1 External Components (Front) . . . . . . . . . . . . . . . . . . . . . . . . A-8
Figure A-2 External Components (Back) . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Figure A-3 External Components (Bottom) . . . . . . . . . . . . . . . . . . . . . . A-10
Figure A-4 HEPA Filter (Filter Enclosure Removed) . . . . . . . . . . . . . . . . A-10
Figure A-5 Internal Components (Inside Front Enclosure) . . . . . . . . . . . A-11
Figure A-6 Internal Components (Inside Rear Enclosure) . . . . . . . . . . . A-12

1-1
1 Introduction
1.1 Overview
This manual, for use by qualified personnel only, contains instructions for
servicing, testing, and maintaining the Covidien WarmTouch™ Convective
Warming Unit. The manual includes all information necessary for
troubleshooting problems with the warming unit and replacing affected
components, including parts lists, replacement procedures, and system
diagrams.
Safety Information Page 1-2
ESD (Electrostatic Discharge) Precautions Page 1-7
Tools Required for Service Page 1-7
Serial Number, Software Version, and Error Codes Page 1-9
Component Disposal - WEEE Directive Page 1-11
Labeling Symbols Page 1-12
Obtaining Technical Assistance Page 1-14
Related Documents Page 1-17
Warranty Information Page 1-17

Introduction
1-2 Service Manual
1.2 Safety Information
This section lists safety information associated with the warming unit. Where
appropriate in the manual, individual Warnings and Cautions are repeated as
reminders. Please familiarize yourself with this safety information before ser-
vicing the warming unit.
For reference, additional Warnings and Cautions that apply to operating the
warming system in the clinical environment are provided in Warnings (Patient
Treatment) on page 1-4 and Cautions (Patient Treatment) on page 1-6.
1.2.1 Safety Symbol Definitions
1.2.2 Warnings (Service)
WARNING:
Possible electric shock hazard. Grounding reliability can be achieved only
when the warming unit is connected to a suitable mains outlet with
protective earth grounding.
WARNING:
The use of accessories or cables with the warming system other than those
indicated in this manual may result in non-compliance with the specifications
listed in Electromagnetic Compatibility (EMC) on page 13-4.
Table1-1.Safety Symbol Definitions
Symbol Definition
WARNING
Warnings alert users to potential serious outcomes (death, injury, or adverse
events) to the patient, user, or environment.
Caution
Cautions alert users to exercise appropriate care for safe and effective use of the
product.
Note
Notes provide additional guidelines or information.

Safety Information
Service Manual 1-3
WARNING:
No modification of this equipment is allowed. Modification can result in
death, injury, or property damage.
WARNING:
Before attempting to open or disassemble the warming unit, disconnect the
power cord from the AC power source.
WARNING:
Do not operate the warming unit with the filter enclosure removed.
1.2.3 Cautions (Service)
Caution:
Do not spray, pour, or spill any liquid on the warming unit, its accessories,
connectors, switches, or openings in the case.
Caution:
The HEPA filter must be replaced every 2,000 hours of operation or 365 days,
whichever comes first.
Caution:
Operation of the warming system may affect or be affected by other devices
in the vicinity due to electromagnetic interference (EMI). If interference
occurs, try increasing the distance between devices, repositioning the cabling,
or plugging the devices into separate outlet circuit branches. Reference
Electromagnetic Compatibility (EMC) on page 13-4 for additional guidance.
Caution:
The institution should follow local governing ordinances and recycling
instructions regarding disposal or recycling of filter and device components or
end of life of the product.
Caution:
Observe ESD (electrostatic discharge) precautions when servicing the
warming unit.

Introduction
1-4 Service Manual
1.2.4 Warnings (Patient Treatment)
The following additional Warnings apply to operating the warming system in
a clinical environment for patient treatment:
WARNING:
Possible explosion hazard. Do not use the device in the presence of flammable
anesthetics or in an oxygen-rich environment.
WARNING:
No free-hosing. Keep hose nozzle connected to a WarmTouch™ blanket at all
times or thermal injury may occur.
WARNING:
Possible burn or infection hazard. Do not allow warming blanket to come in
contact with open wounds. All patients’ wounds should be covered while
using the warming system.
WARNING:
Possible patient burns. Use caution and consider discontinuing use on
patients during vascular surgery when an artery to an extremity is clamped.
Do not apply the warming system to ischemic limbs.
WARNING:
Thermal injury may occur if the warming unit hose comes into contact with
the patient.
WARNING:
Possible fire hazard. Prevent the blanket material from coming into contact
with a laser or an electrosurgical active electrode.
WARNING:
Continuously monitor the patient's temperature during treatment with the
warming system. Use good clinical judgment in selecting and adjusting
temperature settings based on the patient's warming needs and response to
treatment.

Safety Information
Service Manual 1-5
WARNING:
Using the warming system on patients with transdermal medication patches
may increase the rate of drug delivery, potentially causing harm to the
patient.
WARNING:
Thermally conductive materials, such as water, gel, and similar substances,
can decrease the patient's body temperature when the warming unit is
switched off.
WARNING:
Do not use the warming system during magnetic resonance imaging (MRI)
scanning.
WARNING:
Do not operate the warming system in a stacked configuration with other
equipment.
WARNING:
Do not operate the warming system adjacent to other equipment. If such a
configuration cannot be avoided, first test the warming system in the
intended configuration to verify normal operation.
WARNING:
Use WarmTouch™ blankets only as directed. Carefully follow the Instructions
for Use provided with the blankets regarding proper handling and
positioning.
WARNING:
WarmTouch™ blankets are for single patient use only.
WARNING:
Clean the warming unit after each use, as described in this manual.
WARNING:
If a fault or sudden change in performance occurs in the warming system,
discontinue use. Notify your sales/service center. The unit must be serviced by
qualified personnel using procedures provided in the Service Manual.

Introduction
1-6 Service Manual
WARNING:
Possible electrical shock hazard. To reduce the risk of electrical shock, do not
remove the back case. Servicing is only to be done by qualified personnel.
1.2.5 Cautions (Patient Treatment)
The following additional Cautions apply to operating the warming system in a
clinical environment for patient treatment:
Caution:
Federal (U.S.A.) law restricts the use of the warming system to sale by or on
the order of a physician.
Caution:
Only use WarmTouch™ blankets with the WarmTouch warming unit. Do not
attempt to use other types of blankets with the warming unit. Similarly, do
not attempt to use WarmTouch blankets with other types of warming units.
Caution:
The USB port on the warming unit is for service use by qualified personnel
only. During patient treatment, a USB cable must not be connected to the
warming unit.