Daikin Comfora FTXP20~71L2V1B, Service Manual

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1 Troubleshooting
Service manual
5
ATXP20~3 FTXP20~7 ARXP20~3
RXP20~71L2V1B
Split Comfora R32
ESIE18-01 – 2019.02
3 Clean the indoor unit heat exchanger. See "4 Maintenance" on
page 48 .
Possible cause: Dirty indoor unit heat exchanger.
4 Perform a check of the indoor unit heat exchanger thermistor.
See
"2.13 Thermistors" on page 41 .
Possible cause: Faulty indoor unit heat exchanger
thermistor.
5 Perform a check of the indoor unit PCB. See "2.6 Indoor unit
PCB" on page 29 .
Possible cause: Faulty indoor unit PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.5.3 A6-00 – Indoor unit fan motor abnormality
Trigger Effect Reset
The rotation speed of
the fan motor is NOT
detected while the
output voltage to the
fan is at its maximum. Unit will stop
operating. Power reset via the
outdoor unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the indoor unit PCB. See "2.6 Indoor unit
PCB" on page 29 .
Possible cause: Faulty indoor unit PCB.
2 Perform a check of the indoor unit fan motor. See "2.5 Indoor
unit fan motor" on page 27 .
Possible cause: Faulty indoor unit fan motor.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.5.4 C4-00 – Indoor heat exchanger thermistor
abnormality
Trigger Effect Reset
Refrigerant liquid
thermistor detects an
open or short circuit
during compressor
operation. Unit will stop
operating. Power reset via
outdoor unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
INFORMATION
In case of preferential kWh rate, the indoor unit also needs
a power reset.
1 Perform a check of the refrigerant liquid thermistor. See
"2.13 Thermistors" on page 41 .
Possible cause: Faulty refrigerant liquid thermistor.
2 Perform a check of the indoor unit PCB. See "2.6 Indoor unit
PCB" on page 29 .
Possible cause: Faulty indoor unit PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.5.5 C9-00 – Room thermistor abnormality
Trigger Effect Reset
Resistance value is
out of range.
Temperature
measured <–43.6°C
or >90°C. Unit will stop
operating. Automatic reset when
resistance is within
range.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the room thermistor. See
"2.13 Thermistors" on page 41 .
Possible cause: Faulty room thermistor.
2 Perform a check of the indoor unit PCB. See "2.6 Indoor unit
PCB" on page 29 .
Possible cause: Faulty indoor unit PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.5.6 E1-00 – PCB defect
Trigger Effect Reset
Main PCB detects
that EEPROM is
abnormal. Unit will stop
operating. Manual reset via user
interface.
Power reset via
outdoor unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
INFORMATION
In case of preferential kWh rate, the indoor unit also needs
a power reset.
1 Perform a check of the main PCB. See "2.8 Main PCB" on
page 32 .
Possible cause: Faulty main PCB.
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 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.