B. Circuit breaker trips in several minutes after turning the air conditioner on.
●
There is a possibility of short circuit.
9-2-2. Neither indoor nor outdoor unit runs.
A. Power is not supplied.
B. Check "OPERATION selector" switch in the indoor unit.
YES
NO
• OPERATION selector switch is set
in ON position.
Set OPERATION selector switch
to ON.
Switch Ass'y or indoor PCB Ass'y
is defective.
NO
• Check power supply.
Power is being supplied to the
outdoor unit.
Circuit breaker
is tripped.
Power failure
Reset breaker.
Wait for recovery
or contact power
company.
Replace with suitable
one (larger capacity).
•
•
•
NO
Check capacity of circuit breaker.
Capacity of circuit breaker is
suitable.
Measure resistance of outdoor fan
motor winding.
Measure resistance of compressor
motor winding.
• Measure resistance of 4-way valve's
winding.
In case of Heating operation :
30
