Daikin FTXA20AW - F6-00 - Outdoor Unit: Abnormal High Pressure in Cooling

1 | Troubleshooting
Service manual
19
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
1.5.17 F6-00 – Outdoor unit: Abnormal high pressure in cooling
Trigger Effect Reset
Outdoor heat exchanger
thermistor measures a
too high temperature.
Unit will NOT stop
operating.
Automatic reset when
temperature drops.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Clean the outdoor heat exchanger. See "4Maintenance"[4167].
Possible cause: Dirty outdoor heat exchanger.
2 Check that all stop valves of the refrigerant circuit are open. See
"3.2Refrigerant circuit"[4158].
Possible cause: Closed stop valve in the refrigerant circuit.
3 Perform a check of the heat exchanger thermistor. See
"2.19Thermistors"[4144].
Possible cause: Faulty heat exchanger thermistor.
4 Perform a check of the expansion valve. See "2.3Expansion valve"[457].
Possible cause: Faulty expansion valve.
5 Perform a check of the main PCB. See "2.12Main PCB"[491].
Possible cause: Faulty main PCB.
6 Check if the refrigerant circuit is correctly charged. See "3.2 Refrigerant
circuit"[4158].
Possible cause: Refrigerant overcharge.
7 Check for the presence of non‑condensables and/or humidity in the
refrigerant circuit. See "3.2Refrigerant circuit"[4158].
Possible cause: Non‑condensables and/or humidity in the refrigerant circuit.
8 Check if the refrigerant circuit is clogged. See "3.2Refrigerant circuit"[4158].
Possible cause: Clogged refrigerant circuit.
9 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.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.