Signal Transmission Error Between Indoor Unit And Branch Provider (Bp) Unit - Daikin RMXS-L Series Service Manual

Troubleshooting for Branch Provider (BP) Unit
6.4 Signal transmission Error between Indoor Unit and
Branch Provider (BP) Unit
U4
Error Code
Method of Error The data received from the BP unit in signal transmission is checked whether it is normal.
Detection
Error Decision
When the data sent from the BP unit cannot be received normally, or when the content of the data
Conditions is abnormal.
 Defective BP unit PCB
Supposed
 Defective indoor unit PCB
Causes
 Signal transmission error due to wiring error
 Signal transmission error due to disturbed power supply waveform
 Signal transmission error due to breaking of connection wires (wire No. 2).
179
SiUS181305E
Troubleshooting