Troubleshooting - Split Type Indoor Unit Si18-201
232 Service Diagnosis
1.5 Troubleshooting Detail
1.5.1 Faulty PCB
Remote
Controller
Display
A1
Indoor Unit LED
Display
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.
Control connector......S35 and S26
Connector connection check
(note).
YES
Is it normal?
NO
Correct connections.
Replace PCBs (1) and/or (2), (3).
(MF001)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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