Power Supply Insufficient Or Instantaneous Abnormality - Daikin RXYQ-TA Series Service Manual

SiUS341615E

3.56 Power Supply Insufficient or Instantaneous Abnormality

U2
Error Code
Applicable
All outdoor unit models
Models
Method of Error
Detect the voltage of capacitor of the main circuit in the inverter PCB.
Detection
Error Decision When the voltage in the DC circuit (between diode module and power module) falls below specified
Conditions voltage.
Supposed
Causes
Service Diagnosis
Abnormal power supply voltage
Instantaneous power failure
Open phase
Defective inverter PCB
Defective outdoor unit main PCB
Defective compressor
Defective main circuit wiring
Defective fan motor
Defective connection of signal cable
Troubleshooting by Error Code
262