Daikin RXTA30B2V1B, Service Manual

Page: 39 / 264

3 | Troubleshooting
Service manual
39
RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W)
(B)+35M5V1B
R32 Optimized Heating 4 Split
ESIE21-12A – 2022.02
Possible cause:
▪ Faulty or disturbance of the power supply (power supply MUST be within
range of nominal operating voltage ±4%),
▪ Power drop,
▪
Short circuit.
2 Perform a check of the compressor. See "4.2 Compressor" [ 4 57].
Possible cause: Faulty compressor or miswiring of the compressor power
supply cable.
3 Perform a check of the outdoor unit fan motor. See "4.15 Outdoor unit fan
motor" [
4
135].
Possible cause: Faulty outdoor unit fan motor.
4 Perform a check of the main PCB. See "4.14 Main PCB" [
4
126].
Possible cause: Faulty main PCB.
5 Wait until the compressor restarts.
Possible cause:
▪ Momentary drop of voltage,
▪ Momentary power failure.
6 Perform a check of the indoor unit main PCB. See "4.10 Indoor unit main
PCB" [
4
97].
Possible cause: Faulty indoor unit main PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
3.5.32 U4-00 – Indoor/outdoor unit communication problem
Trigger Effect Reset
Communication failure
between outdoor and
indoor unit. Unit will stop operating. Power reset via outdoor
unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check if the power supply is compliant with the regulations. See "5.1 Electrical
circuit" [
4
209].
Possible cause:
▪ Faulty or disturbance of the power supply (power supply MUST be within
range of nominal operating voltage ±4%),
▪ Power drop,
▪
Short circuit.
2 Perform a check of the power supply, connections, wiring,… between the
outdoor unit and the indoor unit. See
"5.1 Electrical circuit" [
4
209].
Possible cause: Faulty wiring between the outdoor unit and the indoor unit.
3 Perform a check of the main PCB. See "4.14 Main PCB" [
4
126].