Signal Transmission Error (Between Indoor And Outdoor Units) - Daikin SUPER MULTI NX G Series Service Manual

SiUS12-928_A
5.7 Signal Transmission Error (between Indoor and Outdoor
Units)
U4
Remote
Controller
Display
Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked
Malfunction whether it is normal.
Detection
Malfunction
The data sent from the outdoor unit cannot be received normally, or the content of the data is
abnormal.
Decision
Conditions
 Defective outdoor unit PCB
Supposed
 Defective indoor unit PCB
Causes
 Wiring error
 Disturbed power supply waveform
 Breaking of the connection wires between the indoor and outdoor units (wire No. 3)
Service Diagnosis
Troubleshooting
110