1 Troubleshooting
Service manual
6
ATXP20~3 FTXP20~7 ARXP20~3
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
Possible cause:
Faulty high pressure switch.
2
Perform a check of the main PCB. See
Possible cause:
Faulty main PCB.
3
Perform a check of the refrigerant circuit. See
.
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
.
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
Possible cause:
Faulty compressor.
4
Perform a check of the expansion valve. See
Possible cause:
Faulty expansion valve.
5
Perform a check of the 4‑way valve. See
Possible cause:
Faulty 4‑way valve.
6
Perform a check of the main PCB. See
Possible cause:
Faulty main PCB.
7
Perform a check of the inverter PCB. See
Possible cause:
Faulty power module = inverter PCB.
8
Perform a check of the refrigerant circuit. See
.
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
.
Possible cause:
Faulty discharge pipe thermistor.
2
Perform a check of the refrigerant circuit. See
.
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
Possible cause:
Faulty compressor.
4
Perform a check of the main PCB. See
Possible cause:
Faulty main PCB.
5
Perform a check of the inverter PCB. See
Possible cause:
Faulty power module = inverter PCB.
