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Troubleshooting
SiBE05-722ED
71
Service Diagnosis
Troubleshooting
Correct the power supply.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
NO
YES
YES
YES
Reconnect the harness.
Check the power supply voltage.
Check the connection of the
compressor harness.
Turn on the power.
Loose or
disconnected?
NO
(Precaution before turning on the power again)
Make sure the power has been off for at
least 30 seconds.
Replace the outdoor
unit PCB.
(R19544)
YES
Disturbance factors
∗
Noise
∗
Power supply distortion
Check for such factors for
a long term.
System restarted?
(Repeat a few times.)
NO
Replace the outdoor fan
motor and the outdoor unit
PCB.
Does the
outdoor fan rotate
smoothly?
Is the
voltage fluctuation
within ±10% from the
rated value?