Transmission System Error (Between Inverter And Main Pcb) - Daikin VRV II-Q RQYQ8-48PY1B Service Manual

SiBE341027
2.25 Transmission System Error (between Inverter and Main
PCB)
LC
Remote
Controller
Display
Applicable RQYQ-PY1B
Models
Method of Error Check the communication state between inverter PCB and main PCB by micro-computer.
Detection
Error Decision When the transmission is not carried out in a specified period of time or longer.
Conditions
Supposed
Causes
Service Diagnosis
Incorrect transmission wiring between the inverter PCB and outdoor unit main PCB
Defective outdoor unit main PCB (transmission section)
Defective inverter PCB
Defective noise filter
External factor (noise etc.)
Defective inverter compressor
Defective fan motor
Troubleshooting by Remote Controller
143