SiENBE04-808_A Troubleshooting
Service Diagnosis 144
Troubleshooting
Correct the power supply.
Replace the PM1. (Replace
the outdoor unit PCB.)
(R8402)
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
YES
YES
NO
YES
(Precaution before turning on the power again)
NO
Replace the fan motor or
the outdoor unit PCB.
Check the supply voltage.
Rotate the fan by hand.
Disturbance factors
∗ Noise ∗ Power supply distortion
Repeat a few
times.
Make sure the power has been off for
Check for such factors for a
long term.
∗ Try to restart a few times.
Turn on the
power again. System
restarted?
Does the fan
rotate smoothly?
Supply voltage
as specified?
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