SiBE12-908 Troubleshooting
Service Diagnosis 120
2.7 Indoor Unit PCB Abnormality
Remote
Controller
Display
A1
Method of
Malfunction
Detection
Evaluation of zero-cross detection of power supply by indoor unit.
Malfunction
Decision
Conditions
When there is no zero-cross detection in approximately 10 continuous seconds.
Supposed
Causes
Faulty indoor unit PCB
Faulty connector connection
Troubleshooting
Note: Connector Nos. vary depending on models.
(R7130)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is it normal?
Connector connection check
(note).
NO
YES
Correct connections.
Replace PCBs.
Model Type Connector No.
Wall Mounted Type Terminal strip~Control PCB
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