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Troubleshooting
SiBE12-933_A
174
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 10 continuous seconds.
Supposed
Causes
Faulty indoor unit PCB
Faulty connector connection
Troubleshooting
Note:
Connector Nos. vary depending on models.
(R7130)
Connector connection check
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is it normal?
NO
YES
Correct connections.
Replace PCBs.
Model Type
Connector
Wall Mounted Type
Terminal strip~Control PCB
Duct Connected Type
Terminal strip~Control PCB
Floor / Ceiling Suspended Dual Type S37
Floor Standing Type
Terminal strip~Control PCB