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SiUS121827E Troubleshooting for Outdoor Unit
Part 6 Service Diagnosis 199
Troubleshooting
Correct the power supply.
Replace the outdoor
unit PCB (main PCB).
Check for such factors for a
long term.
(R22370)
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
NO
YES
YES
NO
YES
YES
Reconnect the harness.
Check the power supply voltage.
Check the connection of the
compressor harness.
Disturbance factors
∗ Noise
∗ Power supply distortion
(Precaution before turning on the power again)
Make sure the power has been off for at
least 30 seconds.
Replace the indoor
unit PCB (control PCB).
Turn on
the power. System
restarted? (Repeat a few
times.)
Error again
within 3 minutes after
turning on the power?
Loose or
disconnected?
NO
YES
NO
Replace the outdoor fan motor
and the outdoor unit PCB
(main PCB).
Does the
outdoor fan rotate smoothly?
Is the
voltage fluctuation
within ±10% from the rated
value?
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