Daikin FTXA20A, Service Manual

Page: 20 / 192

1 | Troubleshooting
Service manual
20
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
1.5.18 F8-00 – System shutdown due to compressor internal temperature abnormality
Trigger Effect Reset
Temperature discharge
pipe thermistor exceeds
the determined limit. 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.
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 discharge pipe thermistor. See
"2.19 Thermistors" [
4
144].
Possible cause: Faulty discharge pipe thermistor or connector fault.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
1.5.19 H0-00 – Outdoor unit: Voltage/current sensor problem
Trigger Effect Reset
Compressor voltage (DC)
is out of range before
start‑up. 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 main PCB. See "2.12 Main PCB" [
4
91].
Possible cause: Faulty main PCB.
2 Check if the power supply is conform with the regulations. See "3.1 Electrical
circuit" [
4
156].