ESIE16-02K
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Part 2. Troubleshooting
2.2. Error based troubleshooting
Page 36
31/05/21
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Version 1.1
RA R32 Split & multi split M-Series
2.2.2.20. “L3-00” – Switch box temperature abnormality
More info:
2.2.2.21. “L4-00” – Inverter radiating fin temperature abnormality
"Replacing DC fan motor assembly" on page 80
Trigger
Effect
Reset
Switch box temperature is too high when
the compressor is off.
Unit will not stop operating.
Automatic reset when temperature drops.
Unit will stop operating.
Manual reset via remote controller.
Possible cause
Check
Corrective action
Faulty outdoor inverter PCB.
Check outdoor inverter PCB.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Restore the power to the outdoor inverter
PCB.
Replace the outdoor inverter PCB when
required.
Faulty radiation fin thermistor.
Faulty outdoor fan motor.
Check the fan motor.
Check fan motor connections and wiring.
Replace fan motor when required.
Adjust wiring when required.
Faulty or disturbance of the power supply
(imbalance > 10%). Power drop. Short cir-
cuit.
Check if the power supply is conform with
regulations. No fluctuations in frequency.
Adjust power supply when required.
Power reset via outdoor unit.
Outdoor heat exchanger is dirty.
Check outdoor heat exchanger.
Clean outdoor heat exchanger when
required.
I
NFORMATION
The Inverter PCB and Main PCB are 1 PCB in this unit.
Check procedures
Replacing procedures
"Replacing main PCB" on page 85
"Replacing DC fan motor assembly" on page 80
"“L3-00” – Switch box temperature abnormality" on page 129
Trigger
Effect
Reset
Radiation fin temperature rise is detected.
Unit will stop operating.
Automatic reset.
Power reset via outdoor unit.
Possible cause
Check
Corrective action
Faulty outdoor fan motor.
Check the fan motor.
Check fan motor connections and wiring.
Replace fan motor when required.
Adjust wiring when required.
Faulty or disturbance of the power supply
(imbalance > 10%). Power drop. Short cir-
cuit.
Check if the power supply is conform with
regulations. No fluctuations in frequency.
Adjust power supply when required.
Power reset via outdoor unit.
Faulty radiating fin thermistor.
Check radiating fin thermistor.
Replace radiating fin thermistor when
required.
Faulty outdoor unit PCB in which radiating
fin thermistor is connected.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives
power.
Restore the power to the outdoor main
PCB.
Replace outdoor main PCB when HAP
LED is not blinking in regular intervals.
Check procedures
Replacing procedures