Troubleshootig Guide; Troubleshooting Guide - LG LP-E5020CL Service Manual

9. TROUBLESHOOTING GUIDE

In general, possible trouble is classified as two causes.
The one is so called Starting Failure which is caused from an electrical defect, and the other is Ineffective Air
Conditioning caused by a defect in the refrigeration circuit and improper application.
Unit runs but ineffective cooling
Check of cold (warm) air cir-
culation for smooth flow.
Dirty indoor coil
(heat exchanger.)
Malfunction of fan.
Clogging of air filter.
Obstruction at air outlet.
Stop of auto air-swing.
Countermeasure against
above trouble.
Check clogging in refrigera-
tion circuit.
Repair clogging in refrigera-
tion circuit.
Ineffective Cooling or Heating
Check outdoor coil
(heat exchanger) & fan
operation.
Check gas leakage.
Repair gas leak.
Replacement of unit if the
unit is beyond repair.
Satisfactory operation with
temperature difference of
inlet & outlet air ;
COOLING : 7~10°C
HEATING : 15~17°C
– 51 –
Check heat load rise at
cooling operation.
Unexpected residue
Added electrical utensil
Check inside gas
pressure.
Adjust refrigerant
charge.
Malfunction of compressor.
Replacement of
compressor