Pentair S06, Instruction Manual, Page: 60 / 64

© 2015 Pentair Equipment Protection 89116616
- 60 -
7. Carefully check the compressor for proper operation - motor should cause slight vibration and the
outer case of the compressor should be warm. Is the compressor showing signs of this?
YES, wait 5 minutes, proceed to step 9.
NO, possible problem:
» Defective start or run capacitor
» Defective overload
» Defective start relay
» Defective contactor
» Defective compressor
Repair or Replace
defective part
8. Make sure the coils are clean then check the evaporator air in and air out temperatures. If the
temperatures are the same:
» Possible loss of refrigerant
» Possible bad valves in compressor
Repair or Replace
defective part
BASIC AIR CONDITIONING TROUBLE SHOOTING CHECKLIST
SYMPTOM POSSIBLE CAUSE
Unit won’t cool
Clogged fins on coil(s)
Dirty filter
Impeller(s) 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
Undersized 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 support, refer to Pentair Cooling Sales and Service Contacts on page 4.