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Copyright ©2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Air Conditioner Service Manual
TABLE OF CONTENTS
Safety Precautions ...........................................................................................................................................................3
Dimensions .......................................................................................................................................................................9
Symbols Used in this Manual .....................................................................................................................................9
Indoor Unit ..................................................................................................................................................................9
Outdoor Unit .............................................................................................................................................................10
Product Specifications ..................................................................................................................................................11
Installation ......................................................................................................................................................................13
Installation Parts .......................................................................................................................................................13
Installation Tools.......................................................................................................................................................13
Installtion Map...........................................................................................................................................................14
Confirm the Refrigerant ............................................................................................................................................15
Select the best Locations..........................................................................................................................................16
Piping Length and Elevation .....................................................................................................................................17
Preparing Work for Installation .................................................................................................................................18
Fixing Indoor Unit......................................................................................................................................................19
Flaring work and connection of piping ........................................................................................................................20
Flaring work ..............................................................................................................................................................20
Connection of piping-Indoor......................................................................................................................................21
Connection of the drain hose....................................................................................................................................22
Connection of piping-Outdoor...................................................................................................................................24
Connecting the cable between indoor unit and outdoor unit ....................................................................................25
Connect the cable to the Indoor unit.........................................................................................................................25
Connection method of the connecting cable(Example) ............................................................................................26
Checking the drainage and forming the pipings.........................................................................................................27
Checking the drainage..............................................................................................................................................28
Forming the piping ....................................................................................................................................................29
AIR PURGING .................................................................................................................................................................30
Air purging ................................................................................................................................................................30
Charging ...................................................................................................................................................................32
Panel front assembly ................................................................................................................................................33
Test running..............................................................................................................................................................34
How to replace picture & photograph ..........................................................................................................................36
Operation ........................................................................................................................................................................37
Functions ..................................................................................................................................................................37
The function of main control .....................................................................................................................................38
Display Function ......................................................................................................................................................44
Self-diagnosis Function ............................................................................................................................................44
Remote Control Operations ......................................................................................................................................45
Disassembly ...................................................................................................................................................................46
Indoor Unit ................................................................................................................................................................46
Schematic Diagram ........................................................................................................................................................48
Heat Pump/Cooling Only Series(Indoor Unit) ...........................................................................................................48
Heat Pump Series (Outdoor Unit).............................................................................................................................49
INDOOR UNIT P.W.B. ASSEMBLY .........................................................................................................................50
OUTDOOR UNIT P.W.B. ASSEMBLY .....................................................................................................................51
DISPLAY P.W.B. ASM..............................................................................................................................................52
Wiring Diagram .........................................................................................................................................................53
Troubleshooting Guide..................................................................................................................................................55
Refrigeration Cycle Diagram.....................................................................................................................................55
Pipe length and the elevation ...................................................................................................................................56
3-way Valve ..............................................................................................................................................................57
Cycle Parts ...............................................................................................................................................................63
Electronic Parts.........................................................................................................................................................64
Exploded View ................................................................................................................................................................73
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