Daikin FTXA25BB - L4-00 - Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise

1 | Troubleshooting
Service manual
25
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
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 "2.12Main PCB"[491].
Possible cause: Faulty main PCB.
2 Perform a check of the outdoor unit fan motor. See "2.13 Outdoor unit fan
motor"[4111].
Possible cause: Faulty outdoor unit fan motor.
3 Check if the power supply is conform with the regulations. See "3.1Electrical
circuit"[4156].
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >4%),
▪ Power drop,
▪ Short circuit.
4 Clean the outdoor heat exchanger. See "4Maintenance"[4167].
Possible cause: Dirty outdoor heat exchanger.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
1.5.27 L4-00 – Outdoor unit: Malfunction of inverter radiating fin temperature rise
Trigger Effect Reset
Radiating fin thermistor
measures a too high
temperature.
Unit will stop operating. Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the outdoor unit fan motor. See "2.13 Outdoor unit fan
motor"[4111].
Possible cause: Faulty outdoor unit fan motor.
2 Check if the power supply is conform with the regulations. See "3.1Electrical
circuit"[4156].
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >4%),
▪ Power drop,
▪ Short circuit.
3 Perform a check of the main PCB. See "2.12Main PCB"[491].
Possible cause: Faulty main PCB.
Prerequisite: Stop the unit operation via the user interface.
4 Turn OFF the respective circuit breaker.