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Fails to Start
Improper thermostat
setting
Loose terminal
connection
Improper wiring
Check voltage power source.
Drop of power voltage.
Capacitor check.
Replacement.
Check control switch
setting.
Compressor fails to
start.
Defect of compressor or
capacitor.
Replacement of compressor
(Motor damaged).
Irregular motor insulation (Ω)
Irregular motor resistance (Ω)
Check of circuit breaker
and fuse.
Gas leakage of feeler
bulb of thermostat.
Check control switch.
Fan fails to start.
Improper wiring.
Defect of fan motor or
capacitor.
Replacement of fan motor.
Regular but fails to start.
Replacement of compressor.
Irregular motor
resistance (Ω)
Irregular motor
insulation (Ω)