Troubleshooting for RA Indoor Unit - F(C)TXG, FTXS, ATXS, FVXS, FLK(X)S, FDK(X)S Series SiBE121021_C
316 Service Diagnosis
5.6 Signal Transmission Error (between Indoor Unit and
Outdoor Unit)
Remote
Controller
Display
U4
Method of
Malfunction
Detection
The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is
checked whether it is normal.
Malfunction
Decision
Conditions
The data sent from the outdoor unit cannot be received normally, or the content of the data is
abnormal.
Supposed
Causes
îš„
Defective outdoor unit PCB
îš„
Defective indoor unit PCB
îš„
Wiring error
îš„
Disturbed power supply waveform
îš„
Breaking of the connection wires between the indoor and outdoor units (wire No. 3)
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