Troubleshooting
SiBE041213E
67
Service Diagnosis
4.8
Signal Transmission Error (between Indoor Unit and
Outdoor Unit)
Error Code
U4
Method of Error
Detection
The data received from the outdoor unit in signal transmission is checked whether it is normal.
Error Decision
Conditions
The data sent from the outdoor unit cannot be received normally, or the content of the data is
abnormal.
Supposed
Causes
Reduction of power supply voltage
Wiring error
Breaking of the connection wires between the indoor and outdoor units (wire No. 3)
Defective outdoor unit PCB
Short circuit inside the fan motor winding
Defective indoor unit PCB
Disturbed power supply waveform
Summary of Contents for FTXS35K2V1B
Page 12: ...SiBE041213E 1 List of Functions Part 1 List of Functions 1 Functions 2...
Page 14: ...SiBE041213E 3 Specifications Part 2 Specifications 1 Specifications 4...
Page 59: ...SiBE041213E Remote Controller 48 Part 5 Remote Controller 1 Remote Controller 49...
Page 129: ...Revision History Month Year Version Revised contents 05 2013 SiBE041213E First edition...