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Principles of Operation

Service Manual

6-7

Thermostat

The thermostat is located in the hose duct adapter near the base of the hose
(see

on page 11-10). It is connected to the power PCBA. The ther-

mostat provides thermal cut-out protection by opening at 49°C to 55°C (120°F
to 131°F), resulting in heater and fan shutdown.

Thermistor

The thermistor is located in the hose duct adapter just below the screen at the
base of the hose (see

on page 11-4 and

page 11-7). It is connected to the power PCBA.

During operation, the temperature measured by the thermistor is monitored
by the A/D processor and relayed to the UI microprocessor for display on the
LCD. If the temperature does not remain within specification, the software
shuts down the heater and fan and generates an alarm.

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Summary of Contents for WarmTouch

Page 1: ...Service Manual WarmTouch Convective Warming Unit...

Page 2: ...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...

Page 3: ...ective 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...

Page 4: ...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 Fil...

Page 5: ...zle 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 S...

Page 6: ...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 F...

Page 7: ...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...

Page 8: ...Page Left Intentionally Blank vi Service Manual...

Page 9: ...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 P...

Page 10: ...n 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 Co...

Page 11: ...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...

Page 12: ...9 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...

Page 13: ...aker 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...

Page 14: ...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...

Page 15: ...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 T...

Page 16: ...ns 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 groundin...

Page 17: ...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 inte...

Page 18: ...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...

Page 19: ...quipment 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 op...

Page 20: ...nt 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...

Page 21: ...ponents properly Do not touch connection points connector pins leads or terminals Keeping non conducting materials plastic containers foam cups synthetic cloth ing cellophane tape etc away from the wo...

Page 22: ...to 13 3 lb in USB cable connector screws Phillips 1 0 18 to 0 27 N m 1 6 to 2 4 lb in Filter enclosure screws Phillips 2 1 2 to 1 6 N m 10 6 to 14 2 lb in Front rear enclosure screws Phillips 2 1 1 to...

Page 23: ...ial number is located on the back of the warming unit Figure 1 1 Figure 1 1 Serial Number Label on Back of Warming Unit The software version number and error codes can be obtained from the warming uni...

Page 24: ...messages if any Figure 1 3 Figure 1 3 System Information Screen Note Time stamps associated with error messages do not necessarily reflect local time The warming unit is set to UTC Coordinated Univers...

Page 25: ...ents that must be disposed of in accordance with WEEE Directive Do not dispose of the warming unit as a whole or the following individual components as unsorted municipal waste Power cord page 8 5 Dis...

Page 26: ...occur X Do not use during magnetic resonance imaging MRI X X Degree of protection from electric shock Protection Class I Type BF applied part X Recommendation to consult accompanying documents X X Re...

Page 27: ...106 kPa X CE Conformit Europ ene authorization mark 0123 T V S D Product Service GmbH notified body Signifies compliance with Medical Device Directive 93 42 EEC X X CSA Canadian Standards Association...

Page 28: ...Gebrige A 2345 sterreich Tel 43 2236 3788 39 Fax 43 2236 3788 3940 Covidien Belgie S A N V Generaal De Wittelaan 9 5 Mechelen 2800 Belgi Tel 32 152 981 37 Fax 32 152 167 83 Covidien Brazil Av Das Na e...

Page 29: ...r City Phase III Gurgaon Haryana 122002 India Tel 91 1244 709800 Fax 91 1244 206850 Covidien Hungary 1095 Budapest Mariassy u 7 Magyarorszag Hungary Tel 36 1880 7975 Fax 36 1777 4932 Covidien Ireland...

Page 30: ...i Bilim Sokak No 5 Sun Plaza Kat 2 3 Sisli Istanbul 34398 Turkey Tel 90 212 366 20 00 Fax 90 212 276 35 25 Covidien South Africa Corporate Park North 379 Roan Crescent Randjespark Midrand South Africa...

Page 31: ...al environment Instructions for Use Covidien WarmTouch Warming Blanket This document provided with WarmTouch warming blankets contains important information regarding intended use handling connection...

Page 32: ...Page Left Intentionally Blank 1 18 Service Manual Introduction...

Page 33: ...clinician to customize and adjust treatment based on the patient s needs Boost Mode For rapid warming air is generated at 47 C for 45 minutes after which the temperature automatically drops to the 45...

Page 34: ...rming Blankets The Covidien WarmTouch Convective Warming Unit is designed for use with WarmTouch blankets only WarmTouch blankets are designed to attach securely to the warming unit s hose nozzle The...

Page 35: ...Product Views Service Manual 2 3 2 3 Product Views 2 3 1 Front View Figure 2 1 Front View 1 Operator s Panel 4 Hose 2 Handle 5 Nozzle Strap with Clip 3 No Free Hosing Label 6 Nozzle...

Page 36: ...verview 2 4 Service Manual 2 3 2 Back View Figure 2 2 Back View 1 No Free Hosing Label 5 Mounting Channel x2 2 Serial Number Label 6 Pole Clamp x3 3 Symbols Label 7 Bed Hook 4 USB Port Under Cover 8 P...

Page 37: ...4 4 and Returning to Standby Mode on page 4 8 2 Status LED Indicates the warming unit s operational status Reference Overview of Warming Unit Operating Modes on page 4 3 3 Fan Off Key During operatio...

Page 38: ...ma tion Reference Monitoring the Filter Status on page 5 10 and Serial Number Soft ware Version and Error Codes on page 1 9 Note Symbol is shown for reference only This menu is accessible only when th...

Page 39: ...Reminders 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 Comp...

Page 40: ...1 Positioning the Unit for Power Cord Installation 2 Insert the power cord into the socket on the warming unit making sure that it is fully seated Note Do not route the power cord through the metal ho...

Page 41: ...taching the Power Cord Service Manual 3 3 Figure 3 2 Power Cord Connection 4 Set the warming unit upright Wrap the power cord around the back of the unit and secure it with the attached strap Figure 3...

Page 42: ...Installation 3 4 Service Manual Figure 3 3 Power Cord Wrapped and Secured...

Page 43: ...must be mounted on the pole with the handle no higher than 76 cm 30 inches above the floor Requirements Measuring tape To install the warming unit on an IV pole 1 On the IV pole mark the maximum mount...

Page 44: ...so that the pole is fully seated in the mounting channel Verify that the handle is not above the maximum height Reference Figure 3 5 on page 3 7 6 Rotate the two clamp feet across the IV pole and tig...

Page 45: ...Installing the Warming Unit Service Manual 3 7 Figure 3 5 Warming Unit Mounted on IV Pole...

Page 46: ...unit is attached to the bed s head board or foot board To attach the warming unit to a bed 1 Locate the bed hook on the back of the warming unit Reference Figure 2 2 on page 2 4 The hook slides in an...

Page 47: ...se the transport cart Reference Obtaining Technical Assistance on page 1 14 To install the warming unit on the cart 1 Ensure that the power cord is secured at the back of the warming unit Reference Fi...

Page 48: ...g Hole 4 Holding the warming unit by the handle and bracing the cart position the warming unit against the cart so that the mounting holes engage the mounting pegs The cart poles must be fully seated...

Page 49: ...Installing the Warming Unit Service Manual 3 11 Figure 3 9 Warming Unit Mounted on Cart...

Page 50: ...Page Left Intentionally Blank 3 12 Service Manual Installation...

Page 51: ...use the warming system for treatment of patients must consult the Operator s Manual 4 2 Safety Reminder WARNING The use of accessories or cables with the warming system other than those indicated in...

Page 52: ...to the warming unit 1 Locate a hospital grade or suitable mains outlet with protective earth grounding Ensure that the power outlet is easily accessible disconnection from the outlet is the only way t...

Page 53: ...on page 2 5 for descriptions of the display symbols 1 On Standby Key Press to place the unit in Ready mode and prepare for operation or press to return to Standby mode when treatment is complete See B...

Page 54: ...cessful an alarm screen appears See Alarms on page 6 12 The Main screen appears Figure 4 1 Note that if the filter needs to be replaced the Replace Filter screen appears instead of the Main screen Fi...

Page 55: ...that the temperature settings and readings on the display correspond to internal measurements of the air entering the hose The air temperature enter ing the blanket is lower and can vary depending on...

Page 56: ...new setting the arrow disappears 4 6 1 Using Boost Mode Boost mode allows rapid warming of patients Air is generated at 47 C 116 6 F for 45 minutes After 45 minutes the setting automatically changes...

Page 57: ...temperature heater off Figure 4 5 Warming System Set to Heat Off 4 6 3 Returning to Ready Mode During operation you can switch back to Ready mode fan and heat off any time you do not need to apply ai...

Page 58: ...oximately 15 seconds The warming unit powers up performs a power on self test POST and resumes operation in the same mode as before the power loss Power restored after approximately 15 seconds The war...

Page 59: ...2 Safety Reminders WARNING Before attempting to open or disassemble the warming unit disconnect the power cord from the AC power source Caution Observe ESD electrostatic discharge precautions when ser...

Page 60: ...it its accessories connectors switches or openings in the case For surface cleaning and disinfection of the warming unit follow your institu tion s procedures or the recommended actions below Surface...

Page 61: ...nstructions 5 4 2 Temperature and Alarm Verification Once a year the following tests must be performed Temperature Accuracy Test Use this test to verify heater output tempera tures See page 7 8 for in...

Page 62: ...65 days whichever comes first Caution The institution should follow local governing ordinances and recycling instructions regarding disposal or recycling of filter and device components or end of life...

Page 63: ...sket in filter enclo sure To replace the filter 1 If the power cord is secured around the back of the unit unwind it completely 2 Position the warming unit on its front so the bottom of the unit is ac...

Page 64: ...losure and attached power cord aside Caution The institution should follow local governing ordinances and recycling instructions regarding disposal or recycling of filter and device components or end...

Page 65: ...letely dry before proceeding c Remove the backing from the new gasket to expose the adhesive d Center the gasket around the raised area in the enclosure and press around the entire gasket to adhere Fi...

Page 66: ...the Replace Filter key The Filter Information screen appears Figure 5 6 Figure 5 6 Filter Information Screen Filter Expired c Press the Filter Reset key d Press the key code as described in Service Sc...

Page 67: ...n at Power On 12 Power off the warming unit by pressing the On Standby key Disconnect the power cord from the outlet 13 Wrap the power cord around the back of the unit and secure it with the attached...

Page 68: ...nly accessible when the warming unit is in Ready mode It is not accessible while the warming unit is operating To view the Filter Information screen 1 If the warming unit is not already powered on fol...

Page 69: ...Monitoring the Filter Status Service Manual 5 11 Figure 5 10 Filter Information Screen 5 To return to the Main screen press the Exit key twice 1 Filter Days Remaining 2 Filter Hours Remaining...

Page 70: ...Page Left Intentionally Blank 5 12 Service Manual Maintenance...

Page 71: ...y or property damage 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 th...

Page 72: ...roduces air output by drawing room air through a High Efficiency Particulate Air HEPA filter across a heating element and into an electrically operated fan The fan outputs the air across a control the...

Page 73: ...e 6 1 shows the relationship between the major components in the warming unit Descriptions of the components and their interactions follow A detailed diagram of the cable connections between the compo...

Page 74: ...ng Modes on page 4 3 The control keys perform a variety of functions depend ing on operating context The keypad is built into the die cut panel that attaches to the unit s front enclo sure The panel i...

Page 75: ...code entries to be time stamped The replaceable battery for the RTC is located on the UI PCBA The USB connector on the UI PCBA supports software updates error log downloads and other service functions...

Page 76: ...comes first Software counters track the number of power on hours and calendar days since the previous filter change These counters rely on the real time clock RTC located on the UI PCBA When the filt...

Page 77: ...heater and fan shutdown Thermistor The thermistor is located in the hose duct adapter just below the screen at the base of the hose see Figure 11 2 on page 11 4 and Figure 11 6 on page 11 7 It is con...

Page 78: ...Troubleshooting 6 8 Service Manual 6 3 4 Component Cable Connections Figure 6 2 Cable Connections Between Major Components...

Page 79: ...t and the power supply power PCBA and equipotential stud page 10 51 Check the fuses on the power PCBA page 10 35 Check the ribbon cable connection between the power PCBA and the UI PCBA page 10 19 Che...

Page 80: ...e 10 12 2 Keypad page 10 3 Speaker not working Check the speaker cable connection to the power PCBA and to the two terminals on the speaker Make sure the wires are on the correct terminals red to posi...

Page 81: ...not within specification Check the error codes on the System Information screen page 1 9 and perform recommended corrective actions page B 1 Check the thermistor cable connection to the power PCBA pag...

Page 82: ...3 Low Priority Alarm Left and Medium Priority Alarm Right Note If multiple alarms occur at the same time the unit reports the highest priority alarm Table 6 2 Alarm Indicators Symbol Tones Type of Al...

Page 83: ...rm screen b Press the On Standby key to power the warming unit back on Note While a low priority alarm may be cleared this way a medium priority alarm typically will not be cleared 2 If possible check...

Page 84: ...Page Left Intentionally Blank 6 14 Service Manual Troubleshooting...

Page 85: ...ent section for minimum testing requirements 7 2 Safety Reminders WARNING Possible electric shock hazard Grounding reliability can be achieved only when the warming unit is connected to a suitable mai...

Page 86: ...gh to reach from computer to hose duct adapter screen inside compressed hose Electrical leakage tester Ground bond tester 7 4 Service Screen Access The warming unit provides screens for performing fun...

Page 87: ...reen and the display turns on A short tone sounds indicating a successful POST If POST is unsuccessful an alarm screen appears see Alarms on page 6 12 The Main screen appears Figure 7 2 Note that if t...

Page 88: ...at Power On 3 Press one of the temperature keys Verify that the temperature reading on the screen rises and stabilizes 4 When finished with all testing a Press the On Standby key to power off the unit...

Page 89: ...1 Perform steps 1 and 2 of the power on test page 7 3 2 Press and verify each key Key Expected Behavior of Unit Temperature reading on Main screen rises and stabilizes Reading corresponds to key press...

Page 90: ...en finished with all testing unplug the unit from the outlet Keypad Test Failure If the test fails see Basic Troubleshooting on page 6 9 Exit Main screen appears On Standby Unit powers off Display OFF...

Page 91: ...t s power cord into the outlet and press the On Standby key 2 Verify that the initial display screen is lighted white and has no vertical or horizontal black or colored rows 3 When finished with all t...

Page 92: ...tput air tempera ture is within specification Requirements Temperature probe see page 7 2 To perform the temperature accuracy test 1 Perform steps 1 and 2 of the power on test page 7 3 2 Fully compres...

Page 93: ...the temperature measured by the probe is within 1 C of the temperature setting 5 Test the 47 C setting a Press the 47 C key Allow the temperature to stabilize for at least 3 minutes b Confirm that th...

Page 94: ...ure 7 5 Figure 7 5 Position of Hose for Flow Test 2 Perform steps 1 and 2 of the power on test page 7 3 3 Press the 34 C key The fan should ramp up to operating speed and air should flow from the nozz...

Page 95: ...condition occurs and that an audible and visual alarm is generated To perform the thermostat test 1 Perform steps 1 and 2 of the power on test page 7 3 2 Press the Menu key on the Main screen The Men...

Page 96: ...st The Thermostat Test screen appears Figure 7 9 Figure 7 9 Thermostat Test Screen 6 Verify that within 1 2 minutes the heater and fan shut down and an alarm is gen erated It is not necessary to time...

Page 97: ...10 When finished with all testing a Press the On Standby key to power off the unit b Unplug the unit from the outlet Thermostat Test Failure If the thermostat fails to open within 20 minutes after the...

Page 98: ...th power cord 200 m 7 6 2 Earth Leakage Current Test Line Leakage 7 6 3 Enclosure Leakage Current Test Line Leakage Table 7 1 Earth Leakage Current Test AC Polarity Line Cord Neutral Cord Leakage Curr...

Page 99: ...esult 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 Caution Observe ESD electrostatic discharg...

Page 100: ...or the clamps If you are replacing the mounting bolts refer to Pole Clamp and Mounting Bolt Replacement on page 11 18 Figure 8 1 Pole Clamps Requirements WT CWU Pole Clamp Kit page A 2 Note Each kit c...

Page 101: ...ed and remove it from the mounting bolt Figure 8 2 Figure 8 2 Pole Clamp Foot and Knob 2 Slide the clamp foot off the bolt 3 Slide the new clamp foot onto the bolt making sure that the rubber pad is t...

Page 102: ...Torque driver with 2 Phillips bit WARNING Disconnect the warming unit s power cord from the AC power source before performing this procedure To replace the USB port cover 1 Remove the screw securing...

Page 103: ...ations listed in Electromagnetic Compatibility EMC on page 13 4 The power cord requires proper disposal in accordance with WEEE Directive Do not dispose of this item as unsorted municipal waste There...

Page 104: ...itution should follow local governing ordinances and recycling instructions regarding disposal or recycling of filter and device components or end of life of the product 4 Dispose of the power cord as...

Page 105: ...Power Cord Replacement Service Manual 8 7 Figure 8 5 Power Cord Wrapped and Secured...

Page 106: ...Manual 8 6 Nozzle Replacement Figure 8 6 Nozzle Requirements WT CWU Nozzle Kit page A 2 Medium flat blade screwdriver with long handle WARNING Disconnect the warming unit s power cord from the AC pow...

Page 107: ...positioning the blade between one of the clips and the surface of the nozzle 3 Lift the clip away from the surface of the nozzle while pulling the nozzle away from the hose until the clip disengages...

Page 108: ...s power cord from the AC power source before performing this procedure To replace the nozzle strap with clip 1 Lift the nozzle off the hook on the side of the warming unit 2 If the current nozzle str...

Page 109: ...her of these labels is damaged or becomes unreadable it must be replaced Figure 8 9 No Free Hosing Labels on Front Enclosure L and Nozzle R Requirements WT No Free Hosing Label Kit page A 2 70 isoprop...

Page 110: ...mpened with a solution of 70 isopropyl alcohol to remove any adhesive remnants from the surface 3 After the surface is completely dry remove the backing from the new label 4 Position the label as show...

Page 111: ...e of the warming unit Refer to the instructions in each component replacement section for minimum testing requirements 9 2 Safety Reminders WARNING No modification of this equipment is allowed Modific...

Page 112: ...rque driver with 2 Phillips bit WARNING Disconnect the warming unit s power cord from the AC power source before performing this procedure To separate the front and rear enclosures 1 If the power cord...

Page 113: ...engage the power cord from its routing bracket and remove it from the socket 4 Remove the seven screws securing the rear enclosure to the front enclosure Figure 9 3 Note that one of the screws is loca...

Page 114: ...apply stress to the cables 6 Carefully lift the front enclosure at the nozzle hook and rotate it away from the rear enclosure Note that if you did not remove the power cord previously you will need t...

Page 115: ...at no cables are caught between them To rejoin the front and rear enclosures 1 Carefully rotate the front enclosure onto the rear enclosure tucking the cables into the rear enclosure as follows Figure...

Page 116: ...s front 4 Reinstall the seven screws securing the rear enclosure to the front enclosure Figure 9 3 on page 9 4 Tighten the screws to 1 1 to 1 5 N m 9 7 to 13 3 lb in 5 If the power cord is not yet att...

Page 117: ...nit upright 7 Perform all required tests for the component being replaced Each component replacement procedure lists testing requirements 8 Wrap the power cord around the back of the unit and secure i...

Page 118: ...Page Left Intentionally Blank 9 8 Service Manual Accessing the Inside of the Warming Unit...

Page 119: ...equirements Keypad Replacement Page 10 3 Display LCD Replacement Page 10 8 User Interface UI PCBA Replacement Page 10 12 Ribbon Cable Replacement Page 10 19 USB Cable Replacement Page 10 22 Clock Batt...

Page 120: ...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 t...

Page 121: ...d Kit page A 3 Torque driver with 2 Phillips bit Knife box cutter or similar tool with a thin stiff blade 70 isopropyl alcohol solution and soft cloth Strap or cable tie to wrap around handle of unit...

Page 122: ...Keypad Cable Connection on UI PCBA 3 Carefully rotate the front enclosure onto the rear enclosure ensuring that no cables are caught between the enclosures Make sure all edges are fully seated 4 Plac...

Page 123: ...dow film and protective paper from the back of the new keypad Make sure that all of the paper is removed from under the keypad cable 8 Check the window for dust fingerprints and debris If necessary cl...

Page 124: ...ough the Access Slot b Align the keypad with the top edge of the recess and press the top edge of the keypad against the recess Figure 10 5 c Rub the keypad downward towards the bottom edge across its...

Page 125: ...pad cable completely into the connector in front of the locking bar Press down on both sides of the locking bar to secure the cable The locking bar must be com pletely seated on both sides Figure 10 6...

Page 126: ...posal in accordance with WEEE Directive Do not dispose of this item as unsorted municipal waste Figure 10 7 Display behind UI PCBA Requirements WT CWU Display Kit page A 3 Torque driver with 2 Phillip...

Page 127: ...ed to the PCBA Figure 10 8 Figure 10 8 Display Cable Connection on UI PCBA 3 Remove the UI PCBA from its mounting screws as follows a Remove the nut from each mounting screw b Remove the lock washer f...

Page 128: ...display out of its window Dispose of the display as required by WEEE Directive 5 Peel the protective film from the new display 6 Place the display into the window with the display cable toward the bo...

Page 129: ...mounting screw f Place a nut on each mounting screw Tighten the nuts to 0 4 to 0 6 N m 3 5 to 5 3 lb in 8 Lift the locking tab at the J207 connector and insert the display cable until it stops against...

Page 130: ...lacement The UI PCBA and the battery on the PCBA require proper disposal in accordance with WEEE Directive Do not dispose of these items as unsorted municipal waste Figure 10 10 UI PCBA Requirements W...

Page 131: ...ating the Front and Rear Enclosures on page 9 2 2 Disconnect the cables from the UI PCBA as follows Figure 10 11 a Slide the locking bar up from the J204 connector and disconnect the keypad cable b Op...

Page 132: ...nut from each mounting screw b Remove the lock washer from each mounting screw c Slide the UI PCBA and shoulder washers off the mounting screws USB cable still attached d Leave the nylon spacer on ea...

Page 133: ...able tie and USB backing plate c Disconnect the USB cable Figure 10 12 USB Connection on UI PCBA Caution The institution should follow local governing ordinances and recycling instructions regarding d...

Page 134: ...From the front of the PCBA insert the cable tie into either hole and through the backing plate c From the back of the PCBA insert the cable tie through the opposite hole in the backing plate to the fr...

Page 135: ...ng screw Tighten the nuts to 0 4 to 0 6 N m 3 5 to 5 3 lb in 8 Connect the remaining cables to the UI PCBA as follows Figure 10 11 on page 10 14 a Lift the locking tab at the J207 connector and insert...

Page 136: ...ervice Manual Figure 10 14 Keypad Cable Secured by Locking Bar 9 Follow the procedure Rejoining the Front and Rear Enclosures on page 9 5 10 Perform the following tests a Keypad Test on page 7 5 b Dis...

Page 137: ...9 10 6 Ribbon Cable Replacement Figure 10 15 Ribbon Cable Requirements WT CWU Ribbon Cable Kit page A 3 Torque driver with 2 Phillips bit WARNING Disconnect the warming unit s power cord from the AC p...

Page 138: ...0 16 Figure 10 16 Ribbon Cable Connections 3 On the Power PCBA open the locking ears at the P101 connector and disconnect the ribbon cable 4 Connect the new ribbon cable to the P101 connector on the P...

Page 139: ...ble Replacement Service Manual 10 21 6 Follow the procedure Rejoining the Front and Rear Enclosures on page 9 5 7 Perform the following tests a Power On Test on page 7 3 b Electrical Safety Tests on p...

Page 140: ...able Replacement Figure 10 17 USB Cable Requirements WT CWU USB Micro AB Cable Kit page A 3 Torque driver with 1 and 2 Phillips bits and 11 32 hex socket Wire cutters 1 cable tie WARNING Disconnect th...

Page 141: ...the screws 3 Follow the procedure Separating the Front and Rear Enclosures on page 9 2 4 Disconnect the cables from the UI PCBA as follows Figure 10 19 a Slide the locking bar up from the J204 connect...

Page 142: ...b Remove the lock washer from each mounting screw c Slide the UI PCBA and shoulder washers off the mounting screws USB cable still attached Leave the shoulder washers in the mounting holes on the PCBA...

Page 143: ...USB cable Figure 10 20 USB Connection on UI PCBA 7 Attach the new USB cable to the UI PCBA as follows Figure 10 21 a Place the backing plate against the non component side of the PCBA cover ing the n...

Page 144: ...backing plate to the front of the PCBA d Connect the USB cable to the J203 connector Figure 10 21 Attaching Backing Plate and Cable Tie to UI PCBA e Adjust the cable tie so that the lock is snug again...

Page 145: ...ew Tighten the nuts to 0 4 to 0 6 N m 3 5 to 5 3 lb in 9 Connect the remaining cables to the new UI PCBA as follows Figure 10 19 on page 10 24 a Lift the locking tab at the J207 connector and insert t...

Page 146: ...e USB connector rotate the rear enclosure so that you can access the outside Secure the connector by installing the two screws from the outside of the enclosure Tighten the screws to 0 18 to 0 27 N m...

Page 147: ...E Directive Do not dispose of this item as unsorted municipal waste Figure 10 23 Clock Battery on UI PCBA Requirements 3V CR 2032 lithium ion coin cell battery Torque driver with 2 Phillips bit Non me...

Page 148: ...titution should follow local governing ordinances and recycling instructions regarding disposal or recycling of filter and device components or end of life of the product 3 Dispose of the battery as r...

Page 149: ...sposal in accordance with WEEE Directive Do not dispose of this item as unsorted municipal waste Figure 10 24 Power PCBA Requirements WT CWU Power PCBA Kit page A 3 Torque driver with 2 Phillips bit W...

Page 150: ...y from the 6 pin P112 connector b Disconnect the power supply output cable from the 4 pin P109 connector c Disconnect the speaker cable from the 2 pin P103 connector d Open the locking ears at the P10...

Page 151: ...ces and recycling instructions regarding disposal or recycling of filter and device components or end of life of the product 1 Heater Cable P114 Connection 5 Ribbon Cable P101 Connection 2 AC Power In...

Page 152: ...ly seated c Connect the fan cable to the 4 pin P111 connector Make sure the connector latch engages d Connect the thermistor cable to the 2 pin P108 connector Make sure the connector latch engages e C...

Page 153: ...on Power PCBA Requirements WT CWU Fuse Kit page A 3 or Littlefuse 0218010 250 V 10 A fuse or equiva lent Torque driver with 2 Phillips bit Note Each kit contains five fuses WARNING Disconnect the warm...

Page 154: ...ocedure Separating the Front and Rear Enclosures on page 9 2 2 Locate and remove the blown fuse s on the Power PCBA 3 Insert the new fuse s 4 Follow the procedure Rejoining the Front and Rear Enclosur...

Page 155: ...10 37 10 11 Speaker Replacement Figure 10 27 Speaker Requirements WT CWU Speaker Kit page A 3 Torque driver with 2 Phillips bit WARNING Disconnect the warming unit s power cord from the AC power sourc...

Page 156: ...new speaker on the four mounting bosses with the connector termi nals towards the Power PCBA Figure 10 28 5 Attach the speaker to the mounting bosses with the four screws Tighten the screws to 1 1 to...

Page 157: ...Speaker Replacement Service Manual 10 39 8 Perform the following tests a Power On Test on page 7 3 Listen for the POST tone to verify speaker opera tion b Electrical Safety Tests on page 7 14...

Page 158: ...ervice Manual 10 12 Speaker Cable Replacement Figure 10 29 Speaker Cable Requirements WT CWU Speaker Cable Kit page A 4 Torque driver with 2 Phillips bit WARNING Disconnect the warming unit s power co...

Page 159: ...e speaker cable from the 2 pin P103 connector Figure 10 30 Speaker Cable Connections 4 Connect the new speaker cable to the P103 connector on the Power PCBA Make sure the connector latch engages 5 Con...

Page 160: ...Replacement Inside Front Enclosure 10 42 Service Manual 7 Perform the following tests a Power On Test on page 7 3 Listen for the POST tone to verify the speaker cable connection b Electrical Safety T...

Page 161: ...Directive Do not dispose of this item as unsorted municipal waste Figure 10 31 Power Supply Requirements WT CWU Pwr Supply Kit page A 4 Torque driver with 1 and 2 Phillips bits Wire cutters and cable...

Page 162: ...GND terminal b Disconnect the AC power inlet wire assembly from the 3 pin CON1 connector c Disconnect the power supply output cable from the 4 pin CON2 connector Figure 10 32 Power Supply Connections...

Page 163: ...onnect the ground cable from the equipotential stud to the GND terminal Make sure the connector is fully seated on the terminal and that the heat shrink on the adjacent capacitor does not get caught u...

Page 164: ...10 14 Power Supply Output Cable Replacement Figure 10 33 Power Supply Output Cable Requirements WT CWU P S Output Cable Kit page A 4 Torque driver with 2 Phillips bit WARNING Disconnect the warming u...

Page 165: ...igure 10 34 Power Supply Output Cable Connections 3 Connect the new power supply output cable to the 4 pin P109 connector on the Power PCBA Make sure the connector latch engages 4 Connect the power su...

Page 166: ...osure 10 48 Service Manual 10 15 Ground Cable Replacement Figure 10 35 Ground Cable Requirements WT CWU Ground Cable Kit page A 4 Torque driver with 2 Phillips bit and 10mm hex socket 1 GND Terminal P...

Page 167: ...ting the Front and Rear Enclosures on page 9 2 2 Disconnect the ground cable from the GND terminal on the power supply Figure 10 35 on page 10 48 3 Disconnect the ground cable from the equipotential s...

Page 168: ...sher Tighten the nut to 3 2 to 3 8 N m 28 3 to 33 6 lb in 5 Connect the ground cable to the GND terminal on the power supply Figure 10 35 on page 10 48 Make sure the connector is fully seated on the t...

Page 169: ...nlet Requirements WT CWU AC Inlet Kit page A 4 Torque driver with 1 and 2 Phillips bits and 10mm hex socket 10 mm open end or box wrench Wire cutters and cable tie some warming unit configurations WAR...

Page 170: ...nnect the AC power inlet wire assembly from the 6 pin P112 connector on the Power PCBA and from the 3 pin CON1 connector on the power supply Figure 10 38 Figure 10 38 AC Power Inlet Connections Note A...

Page 171: ...ff the stud e Leave the equipotential stud on the enclosure Figure 10 39 Equipotential Stud Connections 4 Remove the two screws securing the AC power inlet assembly to the enclosure and remove the ass...

Page 172: ...cause the wires connected to CON1 to form an arch approximately 4 cm 1 5 in above the connector Trim off the end of the cable tie 8 Reinstall the cables on the equipotential stud as follows Figure 10...

Page 173: ...ntial Stud Requirements WT CWU Equipotential Stud Kit page A 4 Torque driver with 2 Phillips bit and 10mm hex socket 10 mm open end or box wrench Ohmmeter or digital multi meter with resistance functi...

Page 174: ...r and lift the power supply ground cable terminal off the stud c Remove the next nut from the stud d Remove the next lock washer and lift the AC power inlet ground cable termi nal off the stud e Pull...

Page 175: ...on top of the lock washer Tighten the nut to 3 2 to 3 8 N m 28 3 to 33 6 lb in d Place the power supply ground cable terminal on top of the nut e Place a lock washer on top of the terminal f Place a...

Page 176: ...Page Left Intentionally Blank 10 58 Service Manual Internal Component Replacement Inside Front Enclosure...

Page 177: ...esting is required after each of these procedures Refer to the instructions in each section for minimum testing requirements Thermistor Sensor Assembly Replacement Page 11 3 Thermostat Replacement Pag...

Page 178: ...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 th...

Page 179: ...Sensor Assembly Replacement Figure 11 1 Thermistor Sensor Assembly Requirements WT CWU Thermistor Sens Assy Kit page A 5 Torque driver with 2 Phillips bit Wire cutters Ruler 2 cable ties 1 Thermistor...

Page 180: ...the thermistor sensor assembly To replace the thermistor sensor assembly 1 Follow the procedure Separating the Front and Rear Enclosures on page 9 2 2 Locate the rivet connecting the thermistor wire t...

Page 181: ...ermistor sensor assembly to the new rivet as follows Figure 11 4 a On the exposed twisted pair wire of the assembly measure a distance just under 3 cm approximately 1 and 1 8 inches from the tip of th...

Page 182: ...hermistor wire can break if too much stress is applied to it 8 Position the thermistor in the hose duct adapter as follows Figure 11 5 a Make sure that the portion of wire between the rivet and the ti...

Page 183: ...p of the thermistor is no more than 0 3 cm 1 8 inch from the center hub of the duct adapter Figure 11 6 Figure 11 6 Thermistor Position Inside Hose Duct Adapter 9 Place the duct adapter back into the...

Page 184: ...connector at P108 on the Power PCBA Figure 11 3 on page 11 5 Make sure that the connector latch engages 12 Place a cable tie around the thermistor cable and fan cable approximately 10 cm 4 inches from...

Page 185: ...stat Replacement Figure 11 8 Thermostat Requirements WT CWU Thermostat Kit page A 5 Torque driver with 2 Phillips bit Small flat blade screwdriver WARNING Disconnect the warming unit s power cord from...

Page 186: ...hen moving the hose duct adapter The connected thermistor wire can break if too much stress is applied to it 3 Lift the hose duct adapter upward so you can access the inside of the duct adapt er 4 Rem...

Page 187: ...de of the hose duct adapter insert the terminal side of the ther mostat through the hole in the duct adapter b Line up the thermostat mounting holes with the holes in the duct adapter c From the insid...

Page 188: ...tat Rivets Inside of Hose Duct Adapter 6 Place the hose duct adapter back into the fan duct by inserting the top edge of the adapter first then rotating the adapter downward until it drops into place...

Page 189: ...e connected as shown 8 Make sure that thermostat cable is routed as shown in Figure 11 8 on page 11 9 It must be positioned to the inside of the adjacent screw boss and pole clamp mounting bolt and in...

Page 190: ...ble Replacement Figure 11 13 Thermostat Cable Requirements WT CWU Thermostat Cable Kit page A 5 Torque driver with 2 Phillips bit Wire cutters 2 cable ties 1 Thermostat Cable Connection to Thermostat...

Page 191: ...e Separating the Front and Rear Enclosures on page 9 2 2 Disconnect the thermostat cable from the 2 pin P113 connector on the Power PCBA Figure 11 14 Figure 11 14 Thermostat Cable Connection to Power...

Page 192: ...nsistency across units they should be connected as shown in Figure 11 15 6 Connect the other end of the thermostat cable to the 2 pin P113 connector on the Power PCBA Make sure that the connector is o...

Page 193: ...from where the heater cable exits below the fan assembly b Place the other cable tie around the cables approximately 10 cm 4 inches from the heater cable connector P114 on the Power PCBA c Trim the e...

Page 194: ...clamps If you are replacing the pole clamps only refer to Pole Clamp Replacement on page 8 2 Figure 11 16 Pole Clamps Requirements WT CWU Pole Clamp Kit page A 5 Torque driver with 2 Phillips bit Sma...

Page 195: ...ure 11 17 Figure 11 17 Pole Clamp Foot and Knob 2 Follow the procedure Separating the Front and Rear Enclosures on page 9 2 3 Remove the pole clamp mounting bolt as follows Figure 11 18 a Position the...

Page 196: ...s ing downward until fully seated 5 Follow the procedure Rejoining the Front and Rear Enclosures on page 9 5 6 Slide the new clamp foot onto the bolt making sure that the rubber pad is toward the unit...

Page 197: ...nual 11 21 11 7 Hose Replacement Figure 11 19 Hose Requirements WT CWU Hose Kit page A 5 Torque driver with 2 Phillips bit Medium flat blade screwdriver with long handle Pliers Small knife or scissors...

Page 198: ...w the procedure Separating the Front and Rear Enclosures on page 9 2 3 Locate the reinforcing wire that attaches the hose to the duct adapter Unbend the wire and slide it through the hole in the duct...

Page 199: ...e until the hose material reaches the flange and the exposed reinforcing wire is at the hole in the flange 8 At a point approximately 1 3 cm 1 2 inch from its free end bend the wire 90 degrees and ins...

Page 200: ...Internal Component Replacement Inside Rear Enclosure 11 24 Service Manual 13 Perform the following tests a Power On Test on page 7 3 b Electrical Safety Tests on page 7 14...

Page 201: ...r Replacement Figure 11 22 Hose Duct Adapter Requirements WT CWU Hose Duct Adapter Kit page A 5 Torque driver with 2 Phillips bit Small flat blade screwdriver Pliers WARNING Disconnect the warming uni...

Page 202: ...igure 11 23 Thermistor Wire and Rivet Caution The thermistor is very delicate and easily damaged Use extreme care when working with the thermistor sensor assembly 3 Carefully place a small flat instru...

Page 203: ...Figure 11 24 Figure 11 24 Thermostat Cable Connection to Thermostat 5 Lift the hose and duct adapter out of the unit 6 Locate the reinforcing wire that attaches the hose to the duct adapter Unbend the...

Page 204: ...disengage it from the duct adapter 8 Remove the thermostat from the hose duct adapter as follows Figure 11 26 a Locate the two rivets securing the thermostat to the duct adapter b From the outside of...

Page 205: ...duct adapter insert the terminal side of the ther mostat through the hole in the duct adapter b Line up the thermostat mounting holes with the holes in the duct adapter c From the inside of the duct...

Page 206: ...clockwise until the hose material reaches the flange and the exposed reinforcing wire is at the hole in the flange b Insert the wire into the flange hole c Bend the wire back toward the flange so tha...

Page 207: ...ged Use extreme care when working with the thermistor sensor assembly 12 Position the thermistor in the hose duct adapter as follows Figure 11 29 a Make sure that the portion of wire between the rivet...

Page 208: ...its they should be connected as shown 14 Make sure that thermostat cable is routed as shown in Figure 11 22 on page 11 25 It must be positioned to the inside of the adjacent screw boss and pole clamp...

Page 209: ...11 33 11 9 Fan Assembly Replacement Figure 11 30 Fan Assembly Requirements WT CWU Fan Assembly Kit page A 5 Torque driver with 1 and 2 Phillips bits Wire cutters 1 cable tie Strap or additional cable...

Page 210: ...ot remove the cover Figure 11 31 USB Port 2 Remove the two screws securing the USB cable connector to the enclosure Save the screws 3 Remove the filter enclosure and filter as follows Figure 11 32 a I...

Page 211: ...lter enclosure with power cord attached filter and screws aside Figure 11 32 Filter Enclosure and Screws 4 Follow the procedure Separating the Front and Rear Enclosures on page 9 2 1 Filter Enclosure...

Page 212: ...the fan cable from the 4 pin P111 connector c Disconnect the thermostat cable from the 2 pin P113 connector d Disconnect the heater cable from the 5 pin P114 connector Figure 11 33 Power PCBA Connect...

Page 213: ...bly Replacement Service Manual 11 37 7 Remove the four screws securing the fan assembly to the rear enclosure Figure 11 34 Figure 11 34 Fan Assembly Screws 8 Supporting the fan assembly turn the enclo...

Page 214: ...r cable Figure 11 35 Figure 11 35 Cable Tie Securing Fan Cable to Thermistor Cable Caution Be careful when moving the hose duct adapter The connected thermistor wire can break if too much stress is ap...

Page 215: ...Fan Assembly Replacement Service Manual 11 39 11 Position the new fan assembly in the unit as shown in Figure 11 36 Figure 11 36 Position of Fan Assembly...

Page 216: ...f the hose duct adapter into the duct and rotate the adapter downward until it drops into place Figure 11 37 Figure 11 37 Inserting the Hose Duct Adapter 13 Using a strap or cable tie secure the hose...

Page 217: ...unit b Place the filter enclosure on the unit aligning the power cord with the socket opening and making sure that the enclosure is fully seated on the unit c Reinstall the three screws in the filter...

Page 218: ...to the 4 pin P111 connector Make sure the connector latch engages d Connect the thermistor cable to the 2 pin P108 connector Make sure the connector latch engages 20 Make sure that thermostat cable i...

Page 219: ...bly Replacement Service Manual 11 43 11 10 Heater Assembly Replacement Caution Do not touch the heater coil Body oil can damage the coil and affect heater operation Figure 11 40 Heater Assembly below...

Page 220: ...rap around the hose duct adapter 70 isopropyl alcohol solution and soft cloth WARNING Disconnect the warming unit s power cord from the AC power source before performing this procedure To replace the...

Page 221: ...b Position the warming unit on its front so the bottom of the unit is accessible c Remove the three screws from the filter enclosure Lift the enclosure away from the unit disengaging the power cord fr...

Page 222: ...the fan cable from the 4 pin P111 connector c Disconnect the thermostat cable from the 2 pin P113 connector d Disconnect the heater cable from the 5 pin P114 connector Figure 11 43 Power PCBA Connect...

Page 223: ...ring the fan assembly to the rear enclosure Figure 11 44 Figure 11 44 Fan Assembly Screws 8 Supporting the fan assembly turn the rear enclosure over Caution Be careful when moving the hose duct adapte...

Page 224: ...hose duct adapter from the fan assembly Figure 11 45 Figure 11 45 Fan Assembly and Hose Duct Adapter 10 Carefully cut and remove the cable ties securing the heater cable to the thermo stat cable Figu...

Page 225: ...Heater Assembly Replacement Service Manual 11 49 11 Lift the fan assembly out of the unit and set it near the handle Figure 11 46 Figure 11 46 Fan Assembly Pulled for Heater Replacement...

Page 226: ...13 Remove the heater assembly from the metal heater cone 14 Use a soft cloth dampened with a solution of 70 isopropyl alcohol to remove any adhesive remnants from the surface Make sure that the surfac...

Page 227: ...cular gasket as follows Figure 11 47 on page 11 50 a Remove the backing from the gasket to expose the adhesive b Center the gasket around the heater assembly just outside the four screw bosses in the...

Page 228: ...f the hose duct adapter into the duct and rotate the adapter downward until it drops into place Figure 11 49 Figure 11 49 Inserting the Hose Duct Adapter 19 Using a strap or cable tie secure the hose...

Page 229: ...ith the socket opening and making sure that the enclosure is fully seated on the unit c Reinstall the three screws in the filter enclosure Figure 11 42 on page 11 45 Tighten the screws to 1 2 to 1 6 N...

Page 230: ...hermostat cable to the 2 pin P113 connector Make sure that the connector is oriented as shown in Figure 11 43 and that it is fully seated c Connect the fan cable to the 4 pin P111 connector Make sure...

Page 231: ...ximately 10 cm 4 inches from the heater cable connector P114 on the Power PCBA c Trim the ends of the cable ties 28 Follow the procedure Rejoining the Front and Rear Enclosures on page 9 5 29 At the b...

Page 232: ...Page Left Intentionally Blank 11 56 Service Manual Internal Component Replacement Inside Rear Enclosure...

Page 233: ...g requirements 12 2 Safety Reminders WARNING No modification of this equipment is allowed Modification can result in death injury or property damage WARNING Before attempting to open or disassemble th...

Page 234: ...ved Reinstalled Requirements WT CWU Front Enclosure Kit page A 6 Torque driver with 1 and 2 Phillips bits and 11 32 and 10mm hex sockets 10 mm open end or box wrench Wire cutters and cable tie some wa...

Page 235: ...12 2 a Remove the top nut and lock washer from the threaded end of the stud b Lift the power supply ground cable terminal off the stud c Remove the next nut and lock washer from the stud d Lift the A...

Page 236: ...the AC power inlet wire assembly to the power supply mounting boss next to the CON1 connector If so cut and remove this cable tie c Remove the two screws securing the AC power inlet assembly to the e...

Page 237: ...the 4 pin P109 connector on the Power PCBA Leave this cable connected to the power supply b Remove the four screws securing the power supply to the enclosure c Remove the power supply and save all com...

Page 238: ...ions 6 Remove the Power PCBA from the enclosure as follows Figure 12 6 a On the UI PCBA open the locking ears at the P204 connector and disconnect the ribbon cable Leave this cable attached to the Pow...

Page 239: ...save all components for installation in the new enclosure Figure 12 6 Power PCBA Connections 1 Ribbon Cable P204 Connection 4 Fan Cable P111 Connection 2 Power PCBA Screw x4 5 Thermostat Cable P113 C...

Page 240: ...A and shoulder washers off the mounting screws supporting the attached display Leave the shoulder washers in the mounting holes on the PCBA Place the UI PCBA and display with the rear enclosure taking...

Page 241: ...so that it is fully seated in its window Make sure that the keypad cable is not caught behind the UI PCBA d Make sure that the shoulder washers are in place in the PCBA mounting holes with the bottom...

Page 242: ...sure the connector latch engages g Connect the ribbon cable to the P204 connector on the UI PCBA Make sure the locking ears close completely on the connector 11 Install the speaker in the new enclosu...

Page 243: ...ch approximately 4 cm 1 5 in above the connector Trim off the end of the cable tie 14 Install the equipotential stud in the new enclosure as follows Figure 12 2 on page 12 3 a From the bottom of the e...

Page 244: ...closure Kit page A 6 Torque driver with 2 Phillips bit WARNING Disconnect the warming unit s power cord from the AC power source before performing this procedure WARNING Do not operate the warming uni...

Page 245: ...structions 5 Place the new filter enclosure on the unit aligning the power cord routing bracket with the socket Make sure that the enclosure is fully seated on the unit 6 Install the three screws in t...

Page 246: ...Enclosure Replacement 12 14 Service Manual Figure 12 10 Power Cord Wrapped and Secured...

Page 247: ...ber label from the rear enclosure and attaching it to the new enclosure Be careful not to damage this label Figure 12 11 Rear Enclosure Outside Components to be Removed Reinstalled 1 Serial Number Lab...

Page 248: ...Figure 12 12 Rear Enclosure Inside Components to be Removed Reinstalled 1 Thermostat Cable 5 Hose Duct Adapter Hose and Thermostat 2 Heater Assembly below Fan Assembly 6 Fan Assembly 3 USB Cable 7 Pol...

Page 249: ...WARNING Disconnect the warming unit s power cord from the AC power source before performing this procedure To replace the rear enclosure 1 At the back of the unit remove the USB port cover and detach...

Page 250: ...around the back of the unit unwind it completely b Position the warming unit on its front so the bottom of the unit is accessible c Remove the three screws from the filter enclosure Lift the enclosure...

Page 251: ...sconnect the following cables from the Power PCBA Figure 12 15 a Disconnect the thermistor cable from the 2 pin P108 connector b Disconnect the fan cable from the 4 pin P111 connector c Disconnect the...

Page 252: ...he cable tie securing the fan cable to the thermistor cable b Remove the cable tie securing the thermistor cable to the tie mount on the enclosure c Remove the two cable ties securing the heater cable...

Page 253: ...Manual 12 21 Figure 12 16 Cable Ties to be Removed from Rear Enclosure 6 Turn the rear enclosure over 1 Cable Tie and Tie Mount Thermistor Cable 3 Cable Ties Heater Cable to Thermostat Cable 2 Cable...

Page 254: ...e careful when moving the hose duct adapter The connected thermistor wire can break if too much stress is applied to it 9 Disengage the hose duct adapter from the fan assembly 10 Lift the hose and hos...

Page 255: ...r cone c Set the heater assembly aside for installation in the new rear enclosure Figure 12 18 Heater Assembly and Gasket 13 Remove the three pole clamps and their mounting bolts as follows Figure 12...

Page 256: ...lts 14 Remove and save the serial number label for attachment to the new rear enclosure as follows Figure 12 20 a Using a handheld blow dryer warm the label slightly to avoid damage during removal b C...

Page 257: ...tach the cable tie mount for the thermistor cable as follows Figure 12 21 a Remove the backing from the mount to expose the adhesive b Position the mount approximately 0 8 cm 1 3 inch below the handle...

Page 258: ...pad is toward the unit c Place a knob on each bolt and tighten it until the clamp foot is secure Do not overtighten 20 Turn the enclosure over and remove the tape and packing material from the heater...

Page 259: ...tal support rib Figure 12 23 Figure 12 23 Routing of Heater Wires 22 Attach the new circular gasket as follows Figure 12 18 on page 12 23 a Remove the backing from the gasket to expose the adhesive b...

Page 260: ...hose at the hose opening in the enclosure making sure that the thermostat is facing toward the side of the enclosure with the hose hook Figure 12 24 Figure 12 24 Position of Hose Duct Adapter 24 Posit...

Page 261: ...acement Service Manual 12 29 Figure 12 25 Inserting the Hose Duct Adapter 26 Using a strap or cable tie secure the hose duct adapter to the enclosure as shown in Figure 12 26 Figure 12 26 Securing the...

Page 262: ...nit b Place the filter enclosure on the unit aligning the power cord with the socket opening and making sure that the enclosure is fully seated on the unit c Reinstall the three screws in the filter e...

Page 263: ...pin P114 connector Make sure that the connector is oriented as shown in Figure 12 15 and that it is fully seated b Connect the thermostat cable to the 2 pin P113 connector Make sure that the connector...

Page 264: ...boss and pole clamp mounting bolt and inside the tabs around the fan assembly 36 Using two cable ties secure the thermostat cable to the heater cable as follows Figure 12 29 a Place one cable tie arou...

Page 265: ...edge to the opposite edge to adhere taking care to eliminate air from under the label Figure 12 30 Serial Number Label 39 Place the cover for the USB port in position on the back of the unit and insta...

Page 266: ...Page Left Intentionally Blank 12 34 Service Manual Enclosure Replacement...

Page 267: ...l Characteristics 13 2 1 Warming Unit 13 2 2 Transport Cart Optional Weight with Power Cord 5 2 kg 11 5 pounds Dimensions hose fully collapsed nozzle in storage position on unit 60 cm x 43 cm x 30 cm...

Page 268: ...acclimate to the operating environment for at least 60 minutes Power Requirements 100 to 240 V AC Max current at 100 V 8 A Max current at 240 V 5 A Input Frequency 50 60 Hz 1 Hz Fuse x2 Littlefuse mfr...

Page 269: ...mperature After 45 minutes of continuous use blower will step down from the Boost to High setting Thermal Protection Threshold Thermostat internal 49 C to 55 C 120 F to 131 F Average Alarm Level 56 dB...

Page 270: ...for use in the electromagnetic environment specified below The cus tomer or the user of the warming system should assure that it is used in such an environment Emissions Test Compliance Electromagnet...

Page 271: ...commercial and or hospital environment Surge IEC EN 61000 4 5 1 kV line s to line s 2 kV line s to earth 1 kV line s to line s 2 kV line s to earth Mains power quality should be that of a typical comm...

Page 272: ...separation dis tance calculated from the equation appro priate for the frequency of the transmitter Conducted RF IEC EN 61000 4 6 3 Vrms 150 kHz 80 MHz 3 Vrms 150 kHz 80 MHz Recommended Separation Di...

Page 273: ...tween Portable and Mobile RF Communications Equipment and the Warming System IEC EN 60601 1 2 2007 Table 6 The warming system is intended for use in an electromagnetic environment in which radiated RF...

Page 274: ...Page Left Intentionally Blank 13 8 Service Manual Product Specifications...

Page 275: ...l Covidien representative for shipping instructions and a Returned Goods Authorization RGA number Be sure to mark the ship ping carton and any shipping documents with the RGA number If possible ship t...

Page 276: ...e cutout 5 Place the two corrugated nozzle support pieces into the notch at the bottom of the nozzle hook Place the nozzle on the hook 6 Place the warming unit into a poly bag 7 Place the unit front s...

Page 277: ...n the Original Carton Service Manual 14 3 Figure 14 1 Packing in the Original Carton 1 Lower Insert 4 Tape 7 Warming Unit 2 Die Cut Tray 5 Nozzle Support x2 8 Upper Insert 3 Die Cut Pad 6 Poly Bag 9 S...

Page 278: ...on 1 Locate a corrugated cardboard shipping carton with a bursting strength of at least 200 pounds per square inch psi 2 Fill the bottom of the carton with at least 2 inches of packing material 3 Plac...

Page 279: ...components necessary for replacement To order parts and accessories contact Covidien Technical Services or your local Covidien representative Reference Obtaining Technical Assistance on page 1 14 Ext...

Page 280: ...cover 10088306 Figure A 2 Page 8 4 Power Cord Australia New Zealand 14 ft GR102844 Figure A 3 Page 8 5 Power Cord Brazil 14 ft GR102843 Figure A 3 Page 8 5 Power Cord European Union 14 ft GR102842 Fi...

Page 281: ...CWU UI PCBA Kit 1 PCB Assembly UI WarmTouch 1 Backing Plate USB Connector 2 Washer Shoulder Nylon 2 Nut 8 32 Machine Screw Hex 2 Washer Lock 8 Ext Tooth 2 Washer 8 Flat Nylon 10088293 Figure A 5 Page...

Page 282: ...nverter GR103060 Figure A 5 Page 10 46 WT CWU Ground Cable Kit 1 Wire Assembly Ground GR103064 Figure A 5 Page 10 48 WT CWU AC Inlet Kit 1 Wire assembly AC inlet 2 Screw 4 x 5 LG Plastite PH PAN HD 10...

Page 283: ...CWU Pole Clamp Kit 3 Pole Clamp Assy with Bumper 3 Knob IV Pole Clamp 3 Hex Bolt 1 4 20 x 3 25 ST Zinc 10088298 Figure A 6 Page 11 18 Clamps Knobs and Mounting Bolts WT CWU Hose Kit 1 Clip Nozzle Hose...

Page 284: ...Kit 1 Enclosure Air Filter WarmTouch 1 Gasket with Adhesive WarmTouch attached to enclosure 3 Screw 8 x 50 Plastite PH HD 4 Screw 8 32 x 38 Truss HD ST Zinc 1 Foot Filter Cover Short attached to encl...

Page 285: ...x 3 8 PH PAN HD LG 5 Pop Rivet Plastic 0 126 0 138 5 Backing Plate USB Connector 10 Rivet Plastic 10 Washer Shoulder Nylon 10 Nut 8 32 Machine Screw Hex 10 Washer Lock 8 Ext Tooth 10 Screw 4 x 5 Lg P...

Page 286: ...rts and Accessories A 8 Service Manual A 7 Parts Locator Figure A 1 External Components Front 1 Front Enclosure 4 Hose 2 Keypad Operator s Panel 5 Nozzle Strap with Clip 3 No Free Hosing Label 6 Nozzl...

Page 287: ...Parts Locator Service Manual A 9 Figure A 2 External Components Back 1 No Free Hosing Label 3 USB Port Cover 2 Rear Enclosure 4 Pole Clamp x3...

Page 288: ...Parts and Accessories A 10 Service Manual Figure A 3 External Components Bottom Figure A 4 HEPA Filter Filter Enclosure Removed 1 Filter Enclosure 3 Equipotential Stud 2 Power Cord...

Page 289: ...wer Inlet 9 USB Cable 2 Power Supply 10 Keypad Cable to Keypad on Front Enclosure 3 Power Supply Output Cable 11 Ribbon Cable 4 Speaker 12 Power PCBA 5 Speaker Cable 13 Fuses 6 User Interface UI PCBA...

Page 290: ...ual Figure A 6 Internal Components Inside Rear Enclosure 1 Thermostat Cable 6 Hose Duct Adapter 2 Heater Assembly below Fan Assembly 7 Thermostat 3 USB Cable 8 Fan Assembly 4 Thermistor Sensor Assembl...

Page 291: ...ou can view the most recent error codes on the System Information screen See Serial Number Software Version and Error Codes on page 1 9 Suggested resolutions are provided for each error If an error si...

Page 292: ...w Description Checksum error on code in flash A D flash is defective Resolution Try reloading software to the unit See page 7 7 If this does not resolve the issue replace the power PCBA See page 10 31...

Page 293: ...r Thermistor dislodged from hose duct adapter See page 11 3 If the thermistor is in position replace the power PCBA See page 10 31 Note This error is also generated during the thermostat test as part...

Page 294: ...oes not resolve the issue replace the power PCBA See page 10 31 014 Category A D Alarm Priority Low Description Fan speed 3000 rpm Resolution Check for Blockage in fan See page 11 33 If there is no bl...

Page 295: ...he fan See page 11 33 017 Category A D Alarm Priority Low Description Fan speed too high for current fan voltage Resolution Replace the fan See page 11 33 028 Category A D Alarm Priority Low Descripti...

Page 296: ...Alarm Priority Low Description Checksum error on downloaded software during software upgrade Resolution Try reloading the software See page 7 7 If this does not resolve the issue either the A D or UI...

Page 297: ...t the customer site Advise the customer to try increasing the distance between devices repositioning the cabling or plugging the devices into separate outlet circuit branches See Electromagnetic Compa...

Page 298: ...on Thermistor values not changing Resolution Replace the power PCBA See page 10 31 053 Category A D Alarm Priority Low Description No edges detected on AC_STATUS signal Resolution N A Indicates that t...

Page 299: ...OST Typically this occurs when the user presses a key while POST is running Resolution If this error occurs without a key being pressed during POST replace the keypad See page 10 3 138 Category POST A...

Page 300: ...calculated checkword does not match the stored checkword Resolution Replace the UI PCBA See page 10 12 152 Category UI Alarm Priority Low Description External watchdog timed out Resolution Replace the...

Page 301: ...ty Low Description Temperature 48 C for at least 30 consecutive seconds Resolution Replace the power PCBA See page 10 31 163 Category UI Alarm Priority Low Description Bad CRC on packet received from...

Page 302: ...n new software file s and retry the upgrade 176 Category UI Alarm Priority Low Description Software upgrade cannot proceed due to header check error Software file may be corrupted or invalid Resolutio...

Page 303: ...The UI microprocessor received a message from the A D microprocessor indicating that the heater was shut down Cause is typically provided in subsequent error messages Resolution N A Refer to subsequen...

Page 304: ...rror may appear due to electromagnetic interference from other devices at the customer site Advise the customer to try increasing the distance between devices repositioning the cabling or plugging the...

Page 305: ...l flash is too small Resolution Try reloading software to the unit See page 7 7 If this does not resolve the issue replace the UI PCBA See page 10 12 211 Category UI Alarm Priority Low Description The...

Page 306: ...may appear due to electromagnetic interference from other devices at the customer site Advise the customer to try increasing the distance between devices repositioning the cabling or plugging the devi...

Page 307: ...ic maintenance details and test results for Covidien WarmTouch Convective Warming Units under ser vice Refer to the instructions in each component replacement section for minimum testing requirements...

Page 308: ...o Upgraded to Filter Counters Reset Yes No Testing Test Results Remarks Power On Test Pass Fail N A Keypad Test Pass Fail N A Display Test Pass Fail N A Temperature Accuracy Test 34 C Setting Reading...

Page 309: ...1 Principles of Operation 6 4 Contacting Covidien 1 14 Contraindications 2 2 Controls 2 5 Covidien Technical Services 1 14 D Description Product 2 1 Dimensions Transport Cart 13 1 Warming Unit 13 1 Di...

Page 310: ...nstallation On Bed 3 8 On Cart 3 9 On IV Pole 3 5 Power Cord 3 2 IV Pole Installation 3 5 K Key Code 7 2 Keypad Kit A 3 Replacement 10 3 Keypad Test 7 5 Keys Operator 2 5 L Labeling Inspection 5 3 Sym...

Page 311: ...Cable Kit A 4 Replacement 10 46 Power On Test 7 3 Principles of Operation 6 2 Product Description 2 1 Product Views Back 2 4 A 9 Bottom A 10 Front 2 3 A 8 Inside Back Enclosure A 12 Inside Front Encl...

Page 312: ...Sensor Assembly Kit A 5 Replacement 11 3 Thermostat Kit A 5 Replacement 11 9 Thermostat Cable Kit A 5 Replacement 11 14 Thermostat Test 7 11 Tools Requirements 1 7 Torque Values 1 8 Transport Cart see...

Page 313: ......

Page 314: ...Part No 10079261 E 2013 05 2013 Covidien Covidien llc 15 Hampshire Street Mansfield MA 02048 USA Covidien Ireland Limited IDA Business and Technology Park Tullamore www covidien com T 1 800 635 5267...

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