Friedrich Uni-Fit US08B10A Service And Parts Manual page 15

Check power source.
Check control switch
setting.
Only compressor fails to
start.
Drop in power voltage.
Defective compressor
capacitor.
Check capacitor.
Replacement.
Irregular motor resistance ( )
Irregular motor insulation ( )
Replacement of compressor
(Motor damaged)
Fails to Start
Improper thermostat setting
Loose terminal connection.
Improper wiring
—15—
Check circuit breaker
and fuse.
Check control board
Only fan fails to start.
Improper wiring.
Defect of fan motor
capacitor.
Irregular motor resistance
( ).
Irregular motor insulation
( ).
Replacement of fan motor
Regular but fails to start
Replacement of compressor
(locking of rotor, metal)