U2 Power Supply Voltage Abnormality - Daikin R71FUV1 Service Manual

Si20-701_B
U2
3.90
Abnormality
Remote Controller Display
U2
Applicable Models
RZQG
Method of Error Detection
The error is detected according to the voltage of main
circuit capacitor built in the inverter and power supply
voltage.
Error Decision Conditions
When the voltage of main circuit capacitor built in the
inverter and power supply voltage drop or when the
power failure of several tens of ms or more is generated
Supposed Causes
Drop in power supply voltage
Defective outdoor unit fan motor
Instantaneous power failure
Defective outdoor unit inverter PCB
Main circuit parts damaged
370
Power Supply Voltage
Troubleshooting by Remote Controller