Troubleshooting SiENBE05-722_A
102 Service Diagnosis
Troubleshooting
Correct the power supply.
Replace the PM1. (Replace
the outdoor unit PCB.)
Check for such factors for a
long term.
∗ Try to restart a few times.
(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
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.
(Precaution before turning on the power again)
Make sure the power has been off for at
least 30 seconds.
Turn on the
power again. System
restarted?
Does the fan
rotate smoothly?
Supply voltage as specified?
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