U2 " Outdoor Unit: Power Supply Insufficient Or Instantaneous Failure - Daikin RQYQ140-180PY1 Service Manual

Troubleshooting by Remote Controller
U2
2.31 " " Outdoor Unit: Power Supply Insufficient or
Instantaneous Failure
U2
Remote
Controller
Display
Applicable RQYQ-PY1
RQEQ-PY1
Models
Method of Detection of voltage of main circuit capacitor built in the inverter and power supply voltage.
Malfunction
Detection
Malfunction When the voltage aforementioned is not less than 190V.
Decision
Conditions
Supposed
Causes
157
Power supply insufficient
Instantaneous power failure
Open phase
Defect of inverter PCB
Defect of outdoor control PCB
Faulty compressor
Defect of main circuit wiring
Faulty fan motor
Faulty connection of signal cable
SiBE341001
Troubleshooting