Daikin Perfera FVXM A Series - Outdoor Unit: Cool;Heat Switchover Problem

2 | Troubleshooting
Service manual
18
RXM20~71R + ARXM25~71R + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11 – 2021.01
Possible cause: Faulty main PCB.
4 Check if the power supply is conform with the regulations. See "4.1Electrical
circuit"[4202].
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >4%),
▪ Power drop,
▪ Short circuit.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.5.14 EA-00 – Outdoor unit: Cool/heat switchover problem
Trigger Effect Reset
Room thermistor is NOT
functioning within
operation range.
Unit will NOT stop
operating.
Automatic reset after a
continuous operation for
some time.
If the error occurs too
soon: 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 4‑way valve. See "3.14-way valve"[441].
Possible cause: Faulty 4‑way valve.
2 Perform a check of the main PCB. See "3.12Main PCB"[4123].
Possible cause: Faulty main PCB.
3 Perform a check of the indoor unit air (room) thermistor. See
"3.19Thermistors"[4189].
Possible cause: Faulty indoor unit air (room) thermistor.
4 Perform a check of the indoor unit main PCB. See "3.9 Indoor unit main
PCB"[4102].
Possible cause: Faulty indoor unit main PCB.
5 Check that all stop valves of the refrigerant circuit are open. See
"4.2Refrigerant circuit"[4204].
Possible cause: Closed stop valve in the refrigerant circuit.
6 Check if the refrigerant circuit is clogged. See "4.2Refrigerant circuit"[4204].
Possible cause: Clogged refrigerant circuit.
7 Check if the refrigerant circuit is correctly charged. See "4.2 Refrigerant
circuit"[4204].
Possible cause: Refrigerant overcharge or shortage.
8 Check for the presence of non‑condensables and/or humidity in the
refrigerant circuit. See "4.2Refrigerant circuit"[4204].