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2
Room Air Conditioner
Air Conditioner Service Manual
TABLE OF CONTENTS
LG Model Name
...............................................................................................................................................3
Safety Precautions
..........................................................................................................................................5
Dimensions
...................................................................................................................................................10
Symbols Used in this Manual ...................................................................................................................10
Indoor Unit................................................................................................................................................10
Outdoor Unit .............................................................................................................................................11
Product Specifications
................................................................................................................................12
Installation
.....................................................................................................................................................15
Selection of the Best Location..................................................................................................................15
Piping Length and Elevation.....................................................................................................................15
How to Fix Installation Plate .....................................................................................................................16
Drill a Hole in the Wall ..............................................................................................................................16
Flaring Work .............................................................................................................................................17
Connection of Piping Indoor .....................................................................................................................18
Connection of the Pipes-Outdoor .............................................................................................................21
Connect the Cable to the Indoor Unit. ......................................................................................................22
Connect the Cable to the Outdoor Unit ....................................................................................................23
Checking the Drainage.............................................................................................................................24
Form the Piping ........................................................................................................................................24
Test Running ............................................................................................................................................25
Operation
......................................................................................................................................................26
Function of Controls .................................................................................................................................26
Display Function ......................................................................................................................................30
Self-diagnosis Function ............................................................................................................................30
Remote Control Operations......................................................................................................................31
Disassembly
..................................................................................................................................................32
Indoor Unit................................................................................................................................................32
Schematic Diagram
.......................................................................................................................................35
Electric Control Device .............................................................................................................................35
Wiring Diagram.........................................................................................................................................37
Components Location ..............................................................................................................................39
Troubleshooting Guide
................................................................................................................................41
Refrigeration Cycle Diagram ....................................................................................................................41
Pipe Length and the Elevation .................................................................................................................42
2-way, 3-way Valve .................................................................................................................................43
Cycle Parts ...............................................................................................................................................49
Electronic Parts ........................................................................................................................................50
Exploded View
..............................................................................................................................................57
Replacement Parts List
................................................................................................................................60