10-1008-194 Rev. 2
Page 9
Symptoms and Possible Causes:
SYMPTOM
POSSIBLE
CAUSE
Unit won’t cool
* Clogged fins on coil(s)
* Dirty filter
* fans not running
*
Compressor
not
running
* Compressor runs, but has bad valves
*
Loss
of
refrigerant
Compressor tries to start but won’t run
* Low line voltage at start. Should be +/-10% rated voltage
*
Compressor
motor
stuck
*
Bad
contactor
*
Bad
overload
switch
*
Bad
run/start
capacitor
Unit blows breakers
* Under sized breaker/fuse or not time delayed
* Short in system
Getting water in enclosure
* Drain plugged
*
Drain
tube
kinked
* Enclosure not sealed (allowing humidity in)
*
Mounting
gasket
damaged
For additional technical information (i.e., amp draw, pressures, temperatures)
contact McLean Thermal at 763-323-8200.
