3M Bair Hugger Model 775

Temperature Management Unit, Patient Warmer

Routine Maintenance

1. Clean air filter: remove any dust with high pressured compressed air or vacuum. 3M recommends to replace the filter every 500 hours or every 12 months.
2. Calibrate if necessary: set the unit to 43°C and wait for the temperature to become steady, compare to a trusted temperature meter.
3. Test overtemp alarm: Hold "Bair Hugger logo" and "43°C" buttons. Two beeps indicate the test has completed. The alarm should stop the unit before it hits 56°C

How to Calibrate Operating Temperature

3M offers a testing "apparatus" for most accurate readings. It is comprised of a resistance based temperature probe held inside a plastic cylinder with a metal air diffusing filter to even out air flow to the temperature probe. You can purchase from 3M or other seller - CATALOG NUMBER: 22110

1. Measure air temperature coming out of the hose with a trusted temperature meter
2. Press and hold "Bair Hugger logo" and "Ambient" buttons until "OS" appears. This is your temperature offset.
3. Wait for the unit to get to a steady temp, then use the 32°C and 38°C buttons to lower and raise the displayed temperature.
4. Lastly, adjust the displayed temperature up or down until it matches what you see on your temperature meter

You can only adjust up to 3° or -3°. If your unit is still not reading close to your trusted reference meter, the hose will need to be replaced.

Fault Codes/Solutions

Fault Codes	Possible Cause	Solution
FC-001 FC-002 FC-003 FC-004 FC-005 FC-006 FC-007	Faulty hose end sensor at patient end. Faulty elbow sensor. Hose disconnected from unit.	Replace hose Replace elbow sensor Calibrate and return to service
FC-008 FC-009 FC-010	Faulty heater element or faulty control board	• Verify fan runs in ambient. • Check continuity of J4 connector wires on control board White to black White to blue White to yellow If "open", replace heater. Otherwise, replace control board.
FC-050	Defective user interface	Replace user interface
FC-053 FC-054	EEPROM error	Reset microprocessor Hold "Bair Hugger logo" and "Standby" buttons at the same time, then connect the unit to power. Release the buttons once the "Standby" light remains on You will need to recalibrate the unit after this resetting the microprocessor.
FC-100 FC-101	Defective control board	Replace control board