Daikin Emura RXJ20A5V1B Service Manual page 24

3 | Troubleshooting
Service manual
24
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
2 Check if the power supply is compliant with the regulations. See
4
circuit" [ 180].
Possible cause:
▪ Faulty or disturbance of the power supply (power supply MUST be within
range of nominal operating voltage ±4%),
▪ Power drop,
▪ Short circuit.
3 Perform a check of the outdoor unit fan motor. See
4
motor" [ 134].
Possible cause: Faulty outdoor unit fan motor.
4 Perform a check of the compressor. See "4.2 Compressor" [
Possible cause: Faulty compressor or miswiring of the compressor power
supply cable.
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
5 Wait until the rectifier voltage is below 10 V DC.
DANGER: RISK OF ELECTROCUTION
Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure
the rectifier voltage is below 10 V DC before proceeding.
6 Check that the thermal interface grease is applied properly on the (PCB or
refrigerant piping) contact surface of the heat sink. Adjust if needed.
Possible cause: Thermal interface grease NOT applied properly on the heat
sink.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
4
"4.12 Main PCB" [ 117].
"4.13 Outdoor unit fan
4
62].
RXJ20~50A + FTXJ-A(W)(S)(B)
"5.1 Electrical
Split Emura 3 R32
ESIE22-04B – 2022.08