Friedrich ZStar ZQ05A10B Service And Parts Manual page 18

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