LG LA090CP - Default Chapter; Table of Contents

2 Room Air Conditioner
Air Conditioner Service Manual
TABLE OF CONTENTS
LG Model Name...............................................................................................................................................3
Safety Precautions..........................................................................................................................................4
Dimensions .....................................................................................................................................................8
Symbols used in this Manual......................................................................................................................8
Indoor Unit..................................................................................................................................................8
Outdoor Unit...............................................................................................................................................9
Installation .....................................................................................................................................................10
Select the Best Location .........................................................................................................................10
Piping Length and Elevation.....................................................................................................................10
Preparing Work for Installation.................................................................................................................11
Fixing the Indoor Unit...............................................................................................................................12
Drill a Hole in the wall...............................................................................................................................12
Flaring Work.............................................................................................................................................13
Connecting the Pipings ............................................................................................................................14
Connecting the Cables to the Indoor Unit ................................................................................................17
Connecting the Cables to the Outdoor Unit..............................................................................................18
Checking the Drainage.............................................................................................................................19
Forming the Piping...................................................................................................................................19
Air Purging ...............................................................................................................................................20
Air Purging with Vacuum Pump................................................................................................................20
Front Panel Assembly ..............................................................................................................................22
Test Running ............................................................................................................................................23
Operation ......................................................................................................................................................24
Function of Controls.................................................................................................................................24
Display Function.......................................................................................................................................25
Self-diagnosis Function............................................................................................................................25
Remote Control Operations......................................................................................................................26
Disassembly ..................................................................................................................................................27
Indoor Unit................................................................................................................................................27
Troubleshooting Guide.................................................................................................................................29
Refrigeration Cycle Diagram....................................................................................................................29
2-way, 3-way Valve ...................................................................................................................................30
Cycle Parts...............................................................................................................................................37
Electronic Parts........................................................................................................................................38
Schematic Diagram.......................................................................................................................................47
Electric control Device..............................................................................................................................47
Wiring Diagram.........................................................................................................................................49
Components Location ..............................................................................................................................50
Product Specifications ................................................................................................................................53
Exploded View ..............................................................................................................................................54
Indoor Unit...............................................................................................................................................54
Outdoor Unit............................................................................................................................................55
Replacement Parts List ................................................................................................................................56
Indoor......................................................................................................................................................56
Outdoor ....................................................................................................................................................57