Troubleshooting - Bair Hugger Security Systems Service Manual

Troubleshooting

call Technical Support for replacement Parts
Problem
The warming unit does not turn
on.
The warming unit circulates air
but it does not heat.
The warming unit heats at some
temperature settings but not on
others. Example: the warming unit
works on LOW setting, but not
on HIGH setting.
Warming unit alarms upon
startup.
Warming unit alarms at too lower
too high a temperature.
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Possible cause
Damaged or unplugged power cord.
Blown power fuses
Poor or loose wire connections.
No power to outlet.
Loose cord at power entry cord.
Poor connections of the thermocouple
(J2) on the control board. (See Figure
10.)
Loose connection at J2. (See Figure 10)
Warming unit has been in an over
heat condition and temperature has
decreased.
Loose wire connections at the desired
heat setting.
Open thermostat.
Poor wire connections at thermostat.
Over heat thermostat not in calibration. See Over Heat Alarm Thermostat
remedy; Service Procedure
Replace the cord or plug in the warming
unit.
Replace the blown fuses. See Power Fuse
Replacement procedure.
Check the connectors at the power entry
module.
Ensure that connector J1 is firmly seated
(see Figure 10).
Check power at the outlet.
Firmly seat the power module.
Reattach any loose thermocouple leads
connections.
Reattach loose connections.
Turn the warming unit OFF and then back
ON.
Reattach any loose connections.
Call Technical Service.
Reattach any loose connections to
thermostat. (See Figure 10).
Adjustment procedure.
Bair Hugger Model 505 Service Manual