Technibel KPAV128C5TAA Technical Data & Service Manual page 56

B. Circuit breaker trips in several minutes after turning the air conditioner on.
There is a possibility of short circuit.
• Check capacity of circuit breaker.
Capacity of circuit breaker is
suitable.
Measure resistance of outdoor fan
•
motor winding.
• Measure resistance of compressor
motor winding.
10-2-2. Neither indoor nor outdoor unit runs.
A. Power is not supplied.
• Check power supply.
Power is being supplied to the
indoor unit.
B. Check "OPERATION selector" switch in the indoor unit.
• OPERATION selector switch is set
in ON position.
Set OPERATION selector switch
to ON.
C. Check transformer in indoor unit.
• Measure resistance of primary and
secondary winding.
NO
NO
YES
NO
(TR1)
Replace with suitable
one (larger capacity).
Circuit breaker
is tripped.
Power failure
Indoor PCB Ass'y is defective.
52
Reset breaker.
Wait for recovery
or contact power
company.