Service manual
15
Bair Hugger Model 775 Temperature Management Unit Service Manual
English 202526A
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5� Wait for the temperature management unit to perform the over-temperature test� When the test is
complete, the temperature management unit performs the following tasks:
• Heater elements turn OFF�
• Blower continues to operate� (: e blower turns o if an over-temperature condition occurs
during normal use�)
6� View the alphanumeric display to determine test outcome:
a� PASS–e unit detected an over-temperature condition within 150 seconds� An alarm sounds
for 2 short beeps� e text “PASS” ashes in the alphanumeric display, followed by these
messages:
1� OT Test OT Test
PASS-Prx OR PASS-Dst
2� TestTime
XX Secs
3� Unplug
To Reset
b� FAIL–Unit did not detect an over-temperature condition within 150 seconds (time-out
failure)� An alarm sounds and the Fault indicator light ashes� e text “FAIL” ashes in the
alphanumeric display, followed by these messages:
1� OT Test
FAIL
2� TestTime
150 Secs
3� Unplug
To Reset
: Do not place a temperature management unit back into service if it fails the Over-temperature
Detection System test� Send the unit back to 3M Patient Warming for repair� See "Returning Units for
Service" on page26�
7� Record the maximum temperature displayed by the test kit� (Use "Maintenance Log" on page30�)
If the temperature is above 56°C, contact 3M Patient Warming technical service for further
instructions�
8� Aer the test is complete, allow the unit to cool by running it for at least ve minutes�
9� Unplug the temperature management unit to reset it to normal operation�