Troubleshooting by Indication on the Remote Controller
274
NO
Has the
power transistor got
faulty?
YES
Replace the
outdoor unit main
PCB.
∗
Observe the
conditions of
the PCB.
In the case of a
serious failure,
a compressor
failure may
cause the
failure of the
PCB. Even if
the PCB is
replaced, it
may cause
failure again.
To avoid that,
recheck the
compressor for
ground and for
any broken
wires.
Furthermore,
even after the
completion of
PCB
replacement,
check the
compressor.
Check the inverter power
transistor.
A
NO
B
Has the
power transistor got
faulty?
YES
Replace the
outdoor unit main
PCB.
∗
Observe the
conditions of
the PCB.
Check the fan driver
power transistor.
Power OFF