Troubleshooting Guide - LG TN-C090BT00 Service Manual

Troubleshooting Guide

In general, possible trouble is classified in two causes.
The one is 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 air cir-
culation for smooth flow.
Dirty indoor coil
(heat exchanger.)
Malfunction of fan.
Clogging of air filter.
Obstruction at air outlet.
Countermeasure against
above trouble.
Check clogging in refrigera-
tion circuit.
Repair clogging in refrigera-
tion circuit.
Ineffective Cooling
Check of outdoor coil
(heat exchanger) & the 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
13
Check heat load increase in
cooling operation.
Unexpected residue
Added electrical utencil
Check of inside gas
pressure.
Adjust refrigerant
charge.
Malfunction of compressor.
Replacement of
compressor