Lc" Outdoor Unit: Malfunction Of Transmission Between Inverter And Control Pcb - Daikin RTSQ20PY1 Service Manual

Troubleshooting by Indication on the Remote Controller
LC
4.40 " " Outdoor Unit: Malfunction of Transmission
between Inverter and Control PCB
LC
Remote
Controller
Display
Applicable RTSQ8P~16P (Outdoor Unit), BTSQ20P (Function Unit)
Models
Method of Check the communication state between inverter PCB and control PCB by micro-computer.
Malfunction
Detection
Malfunction When the correct communication is not conducted in certain period.
Decision
Conditions
Supposed
Causes
285
Malfunction of connection between the inverter PCB and outdoor main PCB
Defect of outdoor main PCB (transmission section)
Defect of inverter PCB
Defect of noise filter
Faulty fan inverter
Incorrect type of inverter PCB
Faulty inverter compressor
Faulty fan motor
External factor (noise etc.)
SiBE31-801_C
Troubleshooting