3M Bair Hugger 775 - Unit Care and Troubleshooting; Cleaning, Maintenance, and Storage; Troubleshooting Persistent Faults

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3M™ Bair Hugger™ Warming Unit Model 775 – Service Manual
Figure 3. Warming Unit HoseReplacement
Reattaching Warming Unit Hose
1. Attach the cable connector of the new warming unit hose to the
header plug, making sure that the protrusions on the connector align
with the corresponding slots on theheader.
2. Align the flat section of the warming unit hose end with the
corresponding flat part of the warming unit’s hose connector and slide
the replacement hose into the warmingunit.
3. Firmly screw the hose collar back into place.
4. Reconnect the warming unit to a grounded powersource.
5. Calibrate operating temperature settings. See page7.
6. Perform over-temperature detection system test. See page 8.
Replacing theFuses
SERVICEFREQUENCY
As needed.
!
Warning: Do not disassemble the warming unit unless you are a
qualified service technician. There are electrically live parts with-in
the warming unit when it is connected to a power source.
Notice: Use proper Electrostatic Discharge (ESD) procedures when
performing maintenance. Failure to do so may result in damage to the
warmingunit.
TOOLS/EQUIPMENT
Phillipsscrewdriver
Wire cutter
Wiretie
Needle-nosepliers
METHOD
1. Detach the warming unit hose (see Detaching Warming Unit Hose on
page 9 forinstructions).
Disassembling the Warming Unit
1. Turn warming unit upside down.
2. Using a Phillips screwdriver, remove the eight screws that secure the
top and bottom enclosurestogether
3. Turn warming unitupright.
4. Remove four screws that attach upper enclosure to backplate.
5. Lift the upper enclosure straight up and disconnect the user interface
wire by squeezing the releasetabs.
6. Replace fuses.
Fuses
Reassembling the Warming Unit
1. Slide the upper enclosure over thechassis.
2. Reinstall the four enclosure screws to attach the upper enclosure
to the back plate. Push down on the top of the warming unit when
tightening the screws to attain proper sealing of theenclosures.
3. Flip the warming unit upside down and replace the eight enclosure
screws. In order to obtain a proper seal and prevent noise, be sure
to tighten these screws fully. If using a power screwdriver, you may
need to increase the torque setting to ensure proper seating. Once
complete, if there is a whistling noise present it is most likely from
these screws not being fullytightened.
4. Reattach the warming unit hose (see Reattaching Warming Unit Hose
on page 10 forinstructions).
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Cleaning, Maintenance andStorage
CleaningInstructions
1. Disconnect the warming unit from the power source beforecleaning.
2. Cleaning should be performed in accordance with hospital practices
for cleaning OR equipment. After every use; wipe the warming unit,
the outside of the warming unit hose, and any other surfaces that may
have been touched. Use a damp, soft cloth and a hospital approved
mild detergent, germicidal disposable wipes, disinfecting towelettes,
or antimicrobial spray.
3. Let air dry or dry with a separate clean soft cloth.
Notice:
Do not use cleaning solutions with greater than 80% alcohol or solvents,
including acetone and thinner, to clean the warming unit or hose. Solvents
may damage the labels and other plasticparts.
Do not immerse the BairHugger warming unit, warming unit parts, or
accessories in any liquid or subject them to any sterilization process.
SERVICEFREQUENCY
As needed.
STORAGE
Store all components in a cool, dry place when not in use.
Troubleshooting
The warming unit software routinely checks unusual operating conditions. If
such a condition occurs, the system may trigger a fault condition and alarm.
The warming unit can be reset by disconnecting the warming unit from the
main power source and allowing 30-60seconds for the system to reset. If
the fault code condition reoccurs, disconnect again and wait 5minutes for
the system to reset. If the fault condition reoccurs upon connection to the
main power source, the warming unit may have a hard-fault or permanent
error. Contact 3M technical support. If the fault does not reoccur upon
connection to the main power source, the warming unit may have a
cautionaryfault.
PERMANENT ERRORS – A FAULT CONDITION ALWAYS OCCURS
AT TURN ON OR AFTER PRESSING A TEMPERATURE SETTING
FAULT CODE POSSIBLE CAUSE SOLUTION
FC-001
FC-002
FC-003
FC-004
FC-005
FC-006
FC-007
Faulty hose end sensor at
patient end.
Replace warming unit hose. Refer to service manual or IFU included with
replacement part forinstructions.
Faulty elbow sensor. Replace elbow sensor. Refer to IFU included with replacement part
forinstructions.
Warming Unit Hose
disconnected from warming
unit (FC-007only).
Reattach warming unit hose.
Calibrate and return toservice.
FC-008
FC-009
FC-010
Faulty heater element or
faulty control board.
Verify fan runs inambient.
Check resistance of J4connector on control board. The resistance may be up to
400Ohms.
White to black
White toblue
White toyellow
If “open”, replace heater. Otherwise, replace controlboard.
Calibrate and return toservice.
FC-050 Defective user interface. Replace userinterface.
Calibrate and return toservice.
FC-053, 054 EEPROM error. Reset microprocessor.
(Press and hold Alternative Mode button and Standby buttons at same time then
connect to power source. Release buttons when Standby light remainson).
Calibrate and return toservice.
FC-100
FC-101
Defective control board. Replace controlboard.
Calibrate and return toservice.
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