McQuay MWM Service Manual Book page 60

1 2
Condenser
fan contactor
Compressor
contactor
The most common causes of air conditioner failure to "start" are :
a) Voltage not within
b) Power supply interrupted.
c) Improper control settings.
d) Air conditioner is disconnected from main power source.
e) Fuse blown or circuit breaker off.
Faulty
Coil burnt
Contact faulty
Fan motor faulty
Other electrical
component faulty
Faulty
Coil burnt
Contact faulty
Open compressor
windings
Incorrect wiring
10% of rated voltage.
Change the contactor
Change the contacts
Repair or change the motor
contactor
Repair or change if necessary
Change the contactor
Change the contacts
Change the compressor
Correct the wiring
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