Description: Signal Transmission Error (between Indoor Unit and Outdoor Unit)
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:
- Wiring error
- Breaking of the connection wires between the indoor and outdoor units
- Defective outdoor unit PCB
- Defective indoor unit PCB
- Disturbed power supply waveform
Troubleshooting Procedure
