A5-00 - Outdoor Unit: High Pressure Peak Cut / Freeze Protection Problem - Daikin Emura RXJ20A5V1B Service Manual

3 | Troubleshooting
3.5.2 A5-00 – Outdoor unit: High pressure peak cut / freeze protection problem
Service manual
20
4 Perform a check of the indoor unit main PCB. See
4
PCB" [ 103].
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.
Trigger
During cooling operation,
indoor heat exchanger
temperature is below 0°C
(freeze‑up protection
control).
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
"5.3 External factors" [
Possible cause: Airflow of the indoor unit is blocked.
2 Clean the air filter of the indoor unit(s). See "6 Maintenance" [
Possible cause: Faulty or dirty air filter.
3 Clean the indoor unit heat exchanger. See "6 Maintenance" [
Possible cause: Dirty indoor unit heat exchanger.
4 Perform a check of the indoor unit heat exchanger thermistor. See
"4.19 Thermistors" [
Possible cause: Faulty indoor unit heat exchanger thermistor.
5 Perform a check of the indoor unit main PCB. See
4
PCB" [ 103].
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.
Effect
Unit will stop operating.
4
192].
4
169].
"4.9 Indoor unit main
Reset
Automatic reset when
temperature is within
range.
4
193].
4
193].
"4.9 Indoor unit main
RXJ20~50A + FTXJ-A(W)(S)(B)
Split Emura 3 R32
ESIE22-04B – 2022.08