LG HBLG2350E Service Manual - Page 18

4.3 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 poor cooling Ineffective Cooling Check of cold air circulation for smooth flow. Dirty indoor coil (Heat exchanger) Malfunction of fan Clogged of air filter Obstruction at air outlet Stop of auto air-swing Check of outdoor coil (heat exchanger) & the fan operation. Check gas leakage. Repair gas leak. Replacement of unit if the unit is beyond repair. Correct above trouble Check clogging in refrigeration circuit. Repair clogging in refrigeration circuit. Satisfactory operation with temperature difference of inlet & outlet air ; 44.6~50°F Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes - 18 - Check heat load increase. Unexpected residue Overloaded Circuit Check of inside gas pressure. Adjusting of refrigerant charge Malfunction of compressor Replacement of compressor LGE Internal Use Only