Daikin Comfora ATXP20~35L2V1B, Service Manual

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1 Troubleshooting
Service manual
11
ATXP20~3 FTXP20~7 ARXP20~3
RXP20~71L2V1B
Split Comfora R32
ESIE18-01 – 2019.02
1 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.
2 Check if the power supply is conform with the regulations. See
"3.1 Power supply" on page 44 .
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
3 Perform a check of the inverter PCB. See "2.7 Inverter PCB" on
page 31 .
Possible cause: Faulty power module = inverter PCB.
4 Perform a check of the main PCB. See "2.8 Main PCB" on
page 32 .
Possible cause: Faulty main PCB.
5 Check that the silicon grease is applied properly on the
radiation fin of the outdoor unit PCB. Adjust if needed.
Possible cause: Silicon grease NOT applied properly on the
radiation fin.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.5.25 L5-00 – Output over current abnormality
Trigger Effect Reset
An output overcurrent
is detected by
checking the current
that flows in the
inverter DC section. 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 inverter PCB. See "2.7 Inverter PCB" on
page 31 .
Possible cause: Faulty power module = inverter PCB.
3 Perform a check of the compressor. See "2.2 Compressor" on
page 20 .
Possible cause: Faulty compressor.
4 Check if the power supply is conform with the regulations. See
"3.1 Power supply" on page 44 .
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.5.26 P4-00 – Fin thermistor abnormality
Trigger Effect Reset
Radiating fin
thermistor input is out
of range. 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 inverter PCB. See "2.7 Inverter PCB" on
page 31 .
Possible cause: Faulty power module = inverter PCB.
2 Perform a check of the main PCB. See "2.8 Main PCB" on
page 32 .
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.5.27 U0-00 – Shortage of refrigerant
Trigger Effect Reset
Refrigerant shortage
detected. Unit will stop
operating. Automatic reset.
Power reset via
outdoor unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of all refrigerant thermistors. See
"2.13 Thermistors" on page 41 .
Possible cause: Faulty refrigerant thermistor(s).
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 compressor. See "2.2 Compressor" on
page 20 .
Possible cause: Faulty compressor.
4 Perform a check of the expansion valve. See "2.3 Expansion
valve" on page 23 .
Possible cause: Faulty expansion valve.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.