Power Supply Insufficient Or Instantaneous Failure - Daikin VRV II-Q RQYQ8-48PY1B Service Manual

Troubleshooting by Remote Controller

2.31 Power Supply Insufficient or Instantaneous Failure

U2
Remote
Controller
Display
Applicable RQYQ-PY1B
Models
Method of Error Detection of voltage of main circuit capacitor built in the inverter PCB and power supply voltage.
Detection
Error Decision When the voltage aforementioned is not less than 190V.
Conditions
Supposed
Causes
152
Power supply insufficient
Instantaneous power failure
Open phase
Defective inverter PCB
Defective outdoor service monitor PCB
Defective compressor
Defective main circuit wiring
Defective fan motor
Defective connection of signal cable
SiBE341027
Service Diagnosis