Service manual

9
Bair Hugger Model 775 Temperature Management Unit Service Manual
English 202526A
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Fault Conditions
e Model 775 Temperature Management Unit’s soware recognizes several nonhazardous fault conditions
including:
• Sensor failures
• Heater failures
• Computer failure
• Soware failure
• Keypad failure
• Power supply failure
• Blower motor failure
• Forced over-temperature test failure
When a fault condition exists, the following events occur:
• Fault indicator light ashes�
• Audible alarm sounds�
• Blower heater turns o�
• Fault code appears in the alphanumeric display�
• Up to 5 fault codes are stored in memory�
When the audible alarm sounds, press any button on the keypad to temporarily silence it� e temperature
management unit must be unplugged before it can be restarted� See "Viewing the Fault Code Log" on
page16 and the "Fault Code Table" on page17 for more information about specic fault codes�
Over-Temperature Condition
When an over temperature condition exists, the following events occur:
• Over-temp indicator light ashes�
• Audible alarm sounds�
• Blower and heater turn o�
• Fault code appears in the alphanumeric display (see page 17)�
When the audible alarm sounds, press any button on the keypad to temporarily silence it� e temperature
management unit must be unplugged before it can be restarted�