LG HBLG6000R Service Manual - Page 18

4.3 TROUBLESHOOTING GUIDE In general, possible trouble is classified in two kinds. The one is called Starting Failure which is caused by an electrical defect. The other is Ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application. Unit is running but cooling is ineffective. Ineffective Cooling Check cold air circulation for smooth flow. Dirty indoor coil (heat exchanger) Malfunction of fan. Clogging of air filter. Obstruction at air outlet. Check outdoor coil (heat exchanger) and fan operation. Check gas leakage. Repair gas leak. Replacement of unit if the unit is beyond repair. Check heat load increase. Clean condenser. Not on separate circuit Check inside gas pressure. Adjust refrigerant charge. Remove obstruction. Malfunction of compressor. Check clogging in refrigeration circuit. Repair clogging in refrigeration circuit. Satisfactory operation with temperature difference of inlet & outlet air; 44~50°F (7~10°C) -18- Replacement of compressor.