Daikin Comfora FTXP20~71L2V1B, Service Manual

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1 Troubleshooting
Service manual
7
ATXP20~3 FTXP20~7 ARXP20~3
RXP20~71L2V1B
Split Comfora R32
ESIE18-01 – 2019.02
6 Perform a check of the 4‑way valve. See "2.1 4-way valve" on
page 18 .
Possible cause: Faulty 4‑way valve.
7 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.
1.5.10 E7-00 – Fan lock abnormality
Trigger Effect Reset
Fan does NOT start
15~30 seconds after
ON signal.
It can occur that the
error code is
triggered when the
fan motor is running
caused by a faulty
rotating sensor
signal.
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 outdoor unit fan motor. See
"2.9 Outdoor unit fan motor" on page 34 .
Possible cause: Faulty outdoor unit fan motor.
2 Perform a check of the inverter PCB. See "2.7 Inverter PCB" on
page 31 .
Possible cause: Faulty power module = inverter PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.5.11 E8-00 – Input overvoltage abnormality
Trigger Effect Reset
Compressor running
current exceeds
standard value for
2.5 seconds. 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 the outdoor temperature. See "3.3 External factors" on
page 47 .
Possible cause: Outdoor temperature is out of operation
range.
2 Perform a check of the compressor. See "2.2 Compressor" on
page 20 .
Possible cause: Faulty compressor.
3 Perform a check of the inverter PCB. See "2.7 Inverter PCB" on
page 31 .
Possible cause: Faulty power module = inverter PCB.
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.
1.5.12 EA-00 – Cooling/Heating switch
abnormality
Trigger Effect Reset
Room thermistor is
NOT functioning
within operation
range. Unit will NOT stop
operating. Automatic reset after
a continuous
operation of
10 minutes.
If the error occurs too
soon: 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 4‑way valve. See "2.1 4-way valve" on
page 18 .
Possible cause: Faulty 4‑way valve.
2 Perform a check of the main PCB. See "2.8 Main PCB" on
page 32 .
Possible cause: Faulty main PCB.
3 Perform a check of the room thermistor. See
"2.13 Thermistors" on page 41 .
Possible cause: Faulty room thermistor.
4 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.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.5.13 F3-00 – Discharge pipe temperature stop
abnormality
Trigger Effect Reset
Discharge pipe
thermistor detects a
too high temperature. Unit will NOT stop
operating. Automatic reset when
temperature drops
normal level.
If the error re-occurs
too soon: unit will
stop operating. Manual reset via user
interface.