Service manual
15
Bair Hugger Model 750 Temperature Management Unit Service Manual
English 202522A
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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 deactivate.
• 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-Pr x 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
NOTE: 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 page 27.
4. Record the maximum temperature displayed by the test kit. (Use maintenance log on page32.)
If the temperature is >56°C (53°C ± 3°C typical) contact 3M Patient Warming technical service for
further instructions.
5. Unplug the temperature management unit to reset it.
*Within 90 seconds in units with < Rev L soware. e Rev version appears in the display window upon
connection to a power source.