Power Supply Insufficient Or Instantaneous Failure - Daikin LRYEQ16AY1 Service Manual

Troubleshooting

8.5.21 Power Supply Insufficient or Instantaneous Failure

U2
Error Code
Applicable LCBKQ3AV1
Models
Method of Error Detection of voltage of main circuit capacitor built in the inverter and power supply voltage.
Detection
Error Decision When the voltage aforementioned is less than 170V
Conditions When the voltage aforementioned is less than 440V
Supposed
Causes
279
Power supply insufficient
Instantaneous power failure
Open phase
Defective PCB
Defective compressor
Defective main circuit wiring
Defective fan motor
Defective connection of signal cable
SiBE811001EB
LED Indications
l h k l h h l
First digit
l k h h h l h
Second digit
CONVENI-PACK