Specifications

Troubleshooting SiBE01-829
56 Service Diagnosis
4.2 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 1.25 continuous seconds.
Supposed
Causes

Faulty indoor unit PCB

Faulty connector connection
Troubleshooting
Note: Connector Nos. vary depending on models.
Connector connection check
(note).
Is it normal?
YES
NO
(R7130)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Correct connections.
Replace PCBs.
Model Type Connector No.
All indoor units Terminal strip~Control PCB
NOT FIXED