Daikin Comfora FTXP20~71L2V1B - E3-00 - High Pressure Switch Abnormality; E5-00 - Overheat of Inverter Compressor Motor; E6-00 - Compressor Startup Defect

1 Troubleshooting
Service manual
6
ATXP20~35L2V1B + FTXP20~71L2V1B + ARXP20~35L2V1B +
RXP20~71L2V1B
Split Comfora R32
ESIE18-01 – 2019.02
1.5.7 E3-00 – High pressure switch abnormality
Trigger Effect Reset
High pressure switch
opens due to
measured pressure
>41.7bar.
Unit will stop
operating.
Manual reset via user
interface.
High pressure control
(measured pressure
>38bar) occurs 16
times within
300minutes.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the high pressure switch. See "2.4 High
pressure switch"on page26.
Possible cause: Faulty high pressure switch.
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 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.
4 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.
1.5.8 E5-00 – Overheat of inverter compressor
motor
Trigger Effect Reset
Compressor overload
is detected.
Unit will NOT stop
operating.
Automatic reset if the
unit runs without
warning for
60seconds.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the discharge pipe thermistor. See
"2.13Thermistors"on page41.
Possible cause: Faulty discharge pipe thermistor.
2 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.
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.
5 Perform a check of the 4‑way valve. See "2.1 4-way valve"on
page18.
Possible cause: Faulty 4‑way valve.
6 Perform a check of the main PCB. See "2.8 Main PCB" on
page32.
Possible cause: Faulty main PCB.
7 Perform a check of the inverter PCB. See "2.7Inverter PCB"on
page31.
Possible cause: Faulty power module = inverter PCB.
8 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.
1.5.9 E6-00 – Compressor startup defect
Trigger Effect Reset
The motor rotor does
NOT rotate when the
compressor is
energized.
Unit will NOT stop
operating.
Automatic reset after
a continuous run for
10minutes.
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 discharge pipe thermistor. See
"2.13Thermistors"on page41.
Possible cause: Faulty discharge pipe thermistor.
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 main PCB. See "2.8 Main PCB" on
page32.
Possible cause: Faulty main PCB.
5 Perform a check of the inverter PCB. See "2.7Inverter PCB"on
page31.
Possible cause: Faulty power module = inverter PCB.