Troubleshooting SiBE12-908
129 Service Diagnosis
2.13 Incompatible Power Supply between Indoor Unit and
Outdoor Unit
Remote
Controller Display
UA
Method of
Malfunction
Detection
Check the incompatible power supply between indoor unit and outdoor unit by using signal
transmission.
Method of
Malfunction
Detection
In case that the indoor intake model is connected to outdoor intake model.
Supposed
Causes
Connected to wrong model
Mounted improper indoor unit PCB
Defective indoor unit PCB
Mounted improper outdoor unit PCB or defective PCB
Troubleshooting
(R9436)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is the combination of
the indoor unit and
the outdoor unit
correct?
Check model names of the indoor
unit and the outdoor unit
Arrange for a correct
combination.
YES
NO
Replace the indoor control
PCB (A1P) (or replace the
outdoor unit PCB).
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