Symptom Check Defect Remedy
Fan motor runs
but compressor
doesn't operate
Compressor trys to
start
With switch set for
cooling, fuse or
circuit breaker open
1) No current runs.
(Compressor
circuit)
2) Current runs.
(Before operating
current, capacitor
normal)
2) Compressor coil burnt out
3) Wiring disconnected or burnt out
2) Change compressor
1) Compressor (main winding)
burnt out
3) Connect
2) Compressor relay defective
3) Change overload relay
1) Change compressor
3) Overload relay contact burn out
2) Solder terminal
3) Change compressor
Change compressor
2) Heat source near to air
conditioner
3) Partial restriction in sealed
system
1) Compressor locked
2) Compressor (Auxiliary winding)
burn out
3) High current draw
4) High current draw
compressor
operates but
stops immediately
1) Check power
source voltage,
start voltage drop
2) Check power
source voltage
4) Insulation test on
compressor
2) Remove heat source
Repair
1) Overload relay defective
1) Change overload relay
1) Change compressor
2) Change PWB ass'y
1) Check power line
fuse or circuit
breaker
1) Power source voltage too low
2) Wiring for power supply
equipment too small
1) Insufficient capacity of fuse
2) Circuit breaker "OFF"
Power source cut off or contact
defective
1) Compressor locked
2) One connection terminal of
compressor burn out
3) One core of lead of compressor
burn out
Circuit insulation defective
1) Change compressor
2) Change compressor
4) Change capacitor
5) Change compressor
1) Change compressor
3) Check sealed system
2) Circuit breaker "ON"
1) Improve the supply
1) Change to rated fuse
2) Improve power
equipment
4) Capacitor defective
5) Compressor winding short
1) Compressor winding short
3) Check compressor
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