ESIE16-02B
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Part 2. Troubleshooting
2.2. Error based troubleshooting
Page 36
4/04/17
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Version 1.1
RA R32 Split & multi split M-Series
2.2.2.22. “L5-00” – Inverter instantaneous overcurrent (AC output)
More info:
2.2.2.23. “P4-00” – Radiating fin temperature sensor abnormality
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.
Possible cause
Check
Corrective action
Installation of the unit is not in line with
specifications.
Check the installation specifications.
Refer to the installation manual.
Adjust the installation when required.
Refrigerant shortage.
Check for refrigerant shortage. Refer to
the nameplate for the correct charge.
Charge the correct refrigerant amount
when required.
Humidity in refrigerant (ice formation in
expansion valve).
Check for humidity in the refrigerant.
In case of suspicion of humidity, recover,
vacuum and recharge with virgin refriger-
ant.
Non condensables in refrigerant.
Check for non condensables in refriger-
ant.
In case of suspicion of non condensables,
recover, vacuum and recharge with virgin
refrigerant.
Stop valve is closed.
Check stop valve.
Open stop valve when required.
Faulty power module = 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 compressor.
Check compressor.
Check connections and wiring of the com-
pressor.
Check expansion valve (liquid back
issue).
Check the refrigerant charge. Refer to the
nameplate for correct charge.
Replace compressor when required.
Investigate reason of breakdown.
Replace expansion valve when required.
Fix possible leak.
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.
I
NFORMATION
The Inverter PCB and Main PCB are 1 PCB in this unit.
Check procedures
Replacing procedures
"Main PCB" on page 53
"Replacing main PCB" on page 84
"Compressor" on page 47
"Replacing compressor" on page 76
"Electronic expansion valve" on page 49
"Replacing expansion valve body" on page 81
Trigger
Effect
Reset
Radiating fin thermistor input voltage is
< 0.04 V or > 4.96 V when power is on.
Unit will stop operating.
Manual reset via user interface.
Possible cause
Check
Corrective action
Faulty radiating fin thermistor.
Check radiating fin thermistor.
Replace radiating fin thermistor when
required.
