Daikin FTXA25BB - A5-00 - Outdoor Unit: High Pressure Peak Cut; Freeze Protection Problem; A6-00 - Indoor Unit Fan Motor Abnormality

1 | Troubleshooting
Service manual
9
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
1.5.2 A5-00 – Outdoor unit: High pressure peak cut / freeze protection problem
Trigger Effect Reset
During cooling operation,
indoor heat exchanger
temperature is below 0°C
(freeze‑up protection
control).
Unit will stop operating. Automatic reset when
temperature is within
range.
During heating operation,
indoor heat exchanger
temperature is above
65°C (heating peak‑cut
control).
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check for objects near the indoor unit that may block the airflow. See
"3.3External factors"[4165].
Possible cause: Airflow of the indoor unit is blocked.
2 Clean the air filter of the indoor unit(s). See "4Maintenance"[4167].
Possible cause: Faulty or dirty air filter.
3 Clean the indoor unit heat exchanger. See "4Maintenance"[4167].
Possible cause: Dirty indoor unit heat exchanger.
4 Perform a check of the indoor unit heat exchanger thermistor. See
"2.19Thermistors"[4144].
Possible cause: Faulty indoor unit heat exchanger thermistor.
5 Perform a check of the indoor unit main PCB. See "2.8 Indoor unit main
PCB"[475].
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.
1.5.3 A6-00 – Indoor unit fan motor abnormality
Trigger Effect Reset
The rotation speed of the
fan motor is NOT
detected while the output
voltage to the fan is at its
maximum.
Unit will stop operating. Power reset via the
outdoor unit.