Daikin FTXP20-71L, Service Manual

Page: 18 / 192

2 | Troubleshooting
Service manual
18
ATXP20~35 + FTXP20~71 + ARXP20~35 + RXP20~71
Split Comfora R32
ESIE18-01E – 2023.01
2.5.5 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 indoor unit air (room) thermistor. See
"3.13 Thermistors" [
4
129].
Possible cause: Faulty indoor unit air (room) thermistor.
2 Perform a check of the indoor unit main PCB. See "3.6 Indoor unit main
PCB" [ 4 78].
Possible cause: Faulty indoor unit main PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.5.6 E1-00 – Outdoor unit: PCB defect
Trigger Effect Reset
Main PCB detects that
EEPROM is abnormal. Unit will stop operating. Manual reset via user
interface.
Power reset.
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 "3.7 Main PCB" [ 4 84].
Possible cause: Faulty main PCB.
2 Check if the power supply is compliant with the regulations. See "4.1 Electrical
circuit" [
4
142].
Possible cause:
▪
Faulty or disturbance of the power supply (power supply MUST be within
range of nominal operating voltage ±4%),
▪
Power drop,
▪ Short circuit.
3 Perform a check of the outdoor unit fan motor. See "3.8 Outdoor unit fan
motor" [ 4 100].
Possible cause: Faulty outdoor unit fan motor.
4 Perform a check of the compressor. See "3.2 Compressor" [
4
52].