Daikin FTXA20A - F3-00 - Outdoor Unit: Malfunction of Discharge Pipe Temperature

1 | Troubleshooting
Service manual
18
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
Possible cause: Refrigerant overcharge or shortage.
8 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.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
1.5.16 F3-00 – Outdoor unit: Malfunction of discharge pipe temperature
Trigger Effect Reset
Discharge pipe thermistor
detects a too high
temperature.
Unit will NOT stop
operating.
Automatic reset when
temperature drops
normal level.
If the error re-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 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.
2 Check if the refrigerant circuit is correctly charged. See "3.2 Refrigerant
circuit"[4158].
Possible cause: Refrigerant overcharge or shortage.
3 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.
4 Check if the refrigerant circuit is clogged. See "3.2Refrigerant circuit"[4158].
Possible cause: Clogged refrigerant circuit.
5 Perform a check of the 4‑way valve. See "2.14-way valve"[440].
Possible cause: Faulty 4‑way valve.
6 Perform a check of the expansion valve. See "2.3Expansion valve"[457].
Possible cause: Faulty expansion valve.
7 Perform a check of the main PCB. See "2.12Main PCB"[491].
Possible cause: Faulty main PCB.
8 Perform a check of all refrigerant side thermistors. See
"2.19Thermistors"[4144].
Possible cause: Faulty refrigerant side thermistor(s).