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Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. The phenomena from main component failure ..............................55
2. Checking Method for Key Components ..........................................56
2.1 Compressor ........................................................................................56
2.2 Fan Motor ............................................................................................57
2.3 Electronic Expansion Valve...............................................................58
2.4 Phase Bridge Diode Checking Method ............................................61
2.5 Inverter IPM Checking Method ................................................................62
2.6 Fan IPM Checking Method(UX3 chassis) ...............................................63
2.7 Fan IPM Checking Method(UX2 chassis) ...............................................64
2.8 Pressure Sensor(High/Low Pressure Sensor) ......................................65
2.9 Outdoor Fan .............................................................................................65
2.10 Solenoid Valve .......................................................................................66
2.11 Reverse Valve.........................................................................................67
2.12 Temperature Sensor ..............................................................................67
2.13 Others .....................................................................................................68
3. Self-diagnosis function
.................................................................69
Trouble shooting guide
Summary of Contents for ARNU05GL1G2
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