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Troubleshooting
Service manual
25
(C)(F)TXA15~50A(W)(S)(T) + (C)(F)TXA15~50B(B)(S)(T) + RXA42+50A +
RXA20~35A + RXA42+50B
Split Stylish R32
ESIE18-03C – 2020.02
1.5.27 L4-00 – Outdoor unit: Malfunction of inverter radiating fin temperature rise
Trigger
Effect
Reset
Radiating fin thermistor
measures a too high
temperature.
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
Possible cause:
Faulty outdoor unit fan motor.
2
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.
3
Perform a check of the inverter PCB. See
79].
Possible cause:
Faulty inverter PCB.
4
Perform a check of the main PCB. See
Possible cause:
Faulty main PCB.
5
Check that the thermal interface grease is applied properly on the radiation fin
of the outdoor unit PCB. Adjust if needed.
Possible cause:
Thermal interface grease NOT applied properly on the
radiation fin.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
1.5.28 L5-00 – Outdoor unit: Inverter instantaneous overcurrent
Trigger
Effect
Reset
An output overcurrent is
detected by checking the
current that flows in the
inverter DC section.
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 that all stop valves of the refrigerant circuit are open. See
Summary of Contents for Stylish Series
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