Daikin Comfora FTXP20~71L2V1B - F6-00 - Stop due to cooling high pressure

1 Troubleshooting
Service manual
8
ATXP20~35L2V1B + FTXP20~71L2V1B + ARXP20~35L2V1B +
RXP20~71L2V1B
Split Comfora R32
ESIE18-01 – 2019.02
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the refrigerant circuit. See "3.2 Refrigerant
circuit"on page45.
Possible cause:
▪ Stop valve is closed,
▪ Clogged refrigerant circuit,
▪ Refrigerant circuit NOT charged correctly,
▪ Humidity in the refrigerant circuit,
▪ Non-condensables in the refrigerant circuit,
▪ Leaking refrigerant circuit.
2 Perform a check of the 4‑way valve. See "2.1 4-way valve"on
page18.
Possible cause: Faulty 4‑way valve.
3 Perform a check of the expansion valve. See "2.3 Expansion
valve"on page23.
Possible cause: Faulty expansion valve.
4 Perform a check of the main PCB. See "2.8 Main PCB" on
page32.
Possible cause: Faulty main PCB.
5 Perform a check of all refrigerant thermistors. See
"2.13Thermistors"on page41.
Possible cause: Faulty refrigerant thermistor(s).
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.5.14 F6-00 – Stop due to cooling high pressure
Trigger Effect Reset
Outdoor heat
exchanger thermistor
measures
temperature
>60°C~65°C
Unit will NOT stop
operating.
Automatic reset when
temperature drops
below 50°C.
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" on
page48.
Possible cause: Dirty outdoor heat exchanger.
2 Perform a check of the refrigerant circuit. See "3.2 Refrigerant
circuit"on page45.
Possible cause:
▪ Stop valve is closed,
▪ Clogged refrigerant circuit,
▪ Refrigerant circuit NOT charged correctly,
▪ Humidity in the refrigerant circuit,
▪ Non-condensables in the refrigerant circuit,
▪ Leaking refrigerant circuit.
3 Perform a check of the heat exchanger thermistor. See
"2.13Thermistors"on page41.
Possible cause: Faulty heat exchanger thermistor.
4 Perform a check of the expansion valve. See "2.3 Expansion
valve"on page23.
Possible cause: Faulty expansion valve.
5 Perform a check of the main PCB. See "2.8 Main PCB" on
page32.
Possible cause: Faulty main PCB.
6 Perform a check of the outdoor unit fan motor. See
"2.9Outdoor unit fan motor"on page34.
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.
1.5.15 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 Perform a check of the refrigerant circuit. See "3.2 Refrigerant
circuit"on page45.
Possible cause:
▪ Stop valve is closed,
▪ Clogged refrigerant circuit,
▪ Refrigerant circuit NOT charged correctly,
▪ Humidity in the refrigerant circuit,
▪ Non-condensables in the refrigerant circuit,
▪ Leaking refrigerant circuit.
2 Perform a check of the discharge pipe thermistor. See
"2.13Thermistors"on page41.
Possible cause: Faulty discharge pipe thermistor.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.5.16 H0-00 – Current sensor abnormality
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 "2.8 Main PCB" on
page32.
Possible cause: Faulty main PCB.
2 Perform a check of the inverter PCB. See "2.7Inverter PCB"on
page31.
Possible cause: Faulty power module = inverter PCB.
3 Check if the power supply is conform with the regulations. See
"3.1Power supply"on page44.