Signal Transmission Error (Between Indoor And Outdoor Unit) - Daikin ATXS35EV1B7 Service Manual

Troubleshooting
4.6 Signal Transmission Error (between Indoor and Outdoor
Unit)
U4
Remote
Controller
Display
Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is
checked whether it is normal.
Malfunction
Detection
Malfunction When the data sent from the outdoor unit cannot be received normally, or when the content of
the data is abnormal.
Decision
Conditions
Supposed
Causes
88
Faulty outdoor unit PCB.
Faulty indoor unit PCB.
Indoor unit-outdoor unit signal transmission error due to wiring error.
Indoor unit-outdoor unit signal transmission error due to disturbed power supply waveform.
Indoor unit-outdoor unit signal transmission error due to breaking of wire in the connection
wires between the indoor and outdoor units (wire No. 3).
Short circuit inside the fan motor winding
SiBE04-824
Service Diagnosis