1 Troubleshooting
Service manual
4
ATXP20~3 FTXP20~7 ARXP20~3
RXP20~71L2V1B
Split Comfora R32
ESIE18-01 – 2019.02
1
Troubleshooting
1.1
To display the error code on the
user interface
1
Hold
for about 5 seconds.
Result:
blinks in the temperature display section.
2
Press
repeatedly until a continuous beep is heard.
Result:
The code is now displayed on the display.
INFORMATION
▪ A short beep and 2 consecutive beeps indicate non-
corresponding codes.
▪ To cancel the code display, hold the
cancel
button for 5 seconds. The code will also disappear from
the display if the button is NOT pressed within
1 minute.
1.2
To reset the error code via remote
controller
Prerequisite:
Problem is solved.
1
Press the ON/OFF button of the remote controller to reset the
error.
1.3
To reset the error code via outdoor
unit
Prerequisite:
Problem is solved.
1
Perform a power reset to reset the error code.
1.4
To perform a test run
Prerequisite:
Power supply MUST be in the specified range.
Prerequisite:
Test run may be performed in cooling or heating
mode.
Prerequisite:
Test run should be performed in accordance with the
operation manual of the indoor unit to make sure that all functions
and parts are working properly.
1
In cooling mode, select the lowest programmable temperature.
In heating mode, select the highest programmable temperature.
Test run can be disabled if necessary.
2
When the test run is finished, set the temperature to a normal
level. In cooling mode: 26~28°C, in heating mode: 20~24°C.
3
The system stops operating 3 minutes after the unit is turned
OFF.
INFORMATION
▪ Even if the unit is turned OFF, it consumes electricity.
▪ When the power turns back on after a power break, the
previously selected mode will be resumed.
1.4.1
To perform a test run in winter season
When operating the air conditioner in
Cooling
mode in winter, set it
to test run operation using the following method.
INFORMATION
Some of the functions CANNOT be used in the test run
operation mode.
If a power failure occurs during operation, the system automatically
restarts immediately after power is restored.
1.5
Error based troubleshooting
1.5.1
A1-00 – PCB abnormality
Trigger
Effect
Reset
The system CANNOT
set the internal
settings.
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.
1
Check for improper combination of the indoor unit and the
outdoor unit. See the combination table in the Databook for
more information.
2
Perform a check of the power supply, connections, wiring,…
between the outdoor unit and the indoor unit. See
Possible cause:
Faulty wiring between the outdoor unit and
the indoor unit.
3
Check if the power supply is conform with the regulations. See
.
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
4
Perform a check of the indoor unit PCB. See
Possible cause:
Faulty indoor unit PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.5.2
A5-00 – Freeze-up protection / heating
peak cut control
Trigger
Effect
Reset
During cooling
operation, indoor heat
exchanger
temperature is below
0°C (freeze‑up
protection control).
Unit will stop
operating.
Automatic reset when
temperature is within
range.
During heating
operation, indoor heat
exchanger
temperature is above
65°C (heating
peak‑cut control).
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1
Check for objects near the indoor unit that may block the
airflow. See
"3.3 External factors" on page 47
Possible cause:
Airflow of the indoor unit is blocked.
2
Clean the air filter. See
.
Possible cause:
Faulty or dirty air filter.
