Service manual

Troubleshooting SiBE05-722_C
68 Service Diagnosis
Troubleshooting
Correct the power supply.
Replace the outdoor unit
PCB.
Check for such factors for a
long term.
∗ Try to restart a few times.
(R17948)
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
YES
NO
YES
(Precaution before turning on the power again)
Disturbance factors
∗ Noise ∗ Power supply distortion
Rotate the outdoor fan by hand.
Repeat a few
times.
Make sure the power has been off for
at least 30 seconds.
YES
YES
Reconnect the compressor
harness.
Is the
compressor
harness loose or
disconnected?
NO
NO
Replace both the fan motor
and the outdoor unit PCB.
Does the
outdoor fan rotate
smoothly?
Turn on the
power again. System
restarted?
Is the power
supply voltage as
rated?