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ESIE17-19C
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Part 2. Troubleshooting
2.2. Error based troubleshooting
19/08/19
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Version 1.1
Page 39
Optimized Heating 4
More info:
2.2.2.23. “L8-00” – Electronic thermal overload
More info:
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.
Check procedures
Replacing procedures
"Replacing compressor" on page 84
"Electronic expansion valve" on page 53
"Replacing expansion valve body" on page 89
Trigger
Effect
Reset
When compressor overload (except dur-
ing start-up) is detected.
Unit will stop operating.
Manual reset via user interface.
Possible cause
Check
Corrective action
Refrigerant circuit is clogged.
Check for possible blockage.
Replace blocked part when required.
Refrigerant overcharge.
Check for refrigerant overcharge. Refer to
the nameplate for the correct charge.
Charge the correct refrigerant amount
when required.
Refrigerant is contaminated.
Replace refrigerant.
Faulty outdoor inverter PCB.
Check outdoor inverter PCB.
Check if the alive led is blinking in regular
intervals.
Check if the correct spare part is installed.
Adjust the power to the outdoor inverter
PCB.
Replace outdoor inverter PCB.
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.
Check procedures
Replacing procedures
"Replacing compressor" on page 84
"Electronic expansion valve" on page 53
"Replacing expansion valve body" on page 89
Possible cause
Check
Corrective action