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Troubleshooting
Service manual
30
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
7
Turn OFF the respective circuit breaker.
DANGER: RISK OF ELECTROCUTION
Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure
the rectifier voltage is below 10 V DC before proceeding.
8
Check that the thermal interface grease is applied properly on the (PCB or
refrigerant piping) contact surface of the heat sink. Adjust if needed.
Possible cause:
Thermal interface grease NOT applied properly on the heat
sink.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
1.5.33 U5-00 – User interface communication problem
Trigger
Effect
Reset
Communication failure
between unit and user
interface.
Unit will stop operating.
Automatic reset.
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 remote controller.
See Business Portal for more information.
Possible cause:
Improper combination of indoor unit and remote controller.
2
Perform a check of the remote controller. See documentation of the specific
remote controller for more information.
Possible cause:
Faulty remote controller.
3
Perform a check of the indoor unit main PCB. See
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.
1.5.34 UA-00 – Indoor unit, outdoor unit mismatching problem
Trigger
Effect
Reset
Signal transmission
between outdoor and
indoor unit abnormality.
Improper combination of
outdoor and indoor unit.
Unit will stop operating.
Power reset via outdoor
unit.