U2-00 - Outdoor Unit: Defect Of Power Supply Voltage - Daikin Sky Air Advance RZA200D7Y1B Service Manual

2 | Troubleshooting
2.4.29 U2-00 – Outdoor unit: Defect of power supply voltage
Service manual
38
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
There is no zero‑cross
detected in approximately
10 seconds (indoor unit
PCB).
Abnormal voltage drop is
detected by the DC
voltage detection circuit.
Abnormal voltage rise is
detected by the
overvoltage detection
circuit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check if the power supply is conform with the regulations. See
4
circuit" [ 135].
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >10%),
▪ Power drop,
▪ Short circuit.
2 Perform a check of the compressor. See "3.2 Compressor" [
Possible cause: Faulty compressor.
3 Perform a check of the outdoor unit fan motor. See
4
motor" [ 107].
Possible cause: Faulty outdoor unit fan motor.
4 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
5 Perform a check of the inverter PCB. See
Possible cause: Faulty inverter PCB.
6 Perform a check of the fan inverter PCB. See
Possible cause: Faulty fan inverter PCB.
7 Perform a check of the noise filter PCB. See
Possible cause: Faulty noise filter PCB.
8 Wait until the compressor restarts.
Possible cause:
▪ Momentary drop of voltage,
▪ Momentary power failure.
Effect
Unit will stop operating.
Unit will stop operating.
Unit will stop operating.
"3.9 Main
"3.7 Inverter
"3.5 Fan inverter
"3.10 Noise filter
Reset
Power reset.
Automatic restart after
compressor stand‑by of
3 minutes.
Automatic restart after
compressor stand‑by of
3 minutes.
"4.1 Electrical
4
56].
"3.11 Outdoor unit fan
4
PCB" [ 95].
4
PCB" [ 81].
4
PCB" [ 74].
4
PCB" [ 101].
RZA200+250D7Y1B
Sky Air Advance-series
ESIE19-13A – 2020.05