LG LSU120HE User Manual
Page 2
2 Room Air Conditioner
Air Conditioner Service Manual
TABLE OF CONTENTS
Safety Precautions..........................................................................................................................................3
Dimensions......................................................................................................................................................9
Symbols Used in this Manual .....................................................................................................................9
Indoor Unit..................................................................................................................................................9
Outdoor Unit .............................................................................................................................................11
Installation .....................................................................................................................................................14
Selection of the Best Location..................................................................................................................17
Piping Length and Elevation.....................................................................................................................18
How to Fix Installation Plate .....................................................................................................................19
Drill a Hole in the Wall ..............................................................................................................................19
Drain hose junction...................................................................................................................................19
Flaring work and connection of piping .......................................................................................................20
Flaring work..............................................................................................................................................20
Connection of Piping Indoor .....................................................................................................................21
Connection of the Pipes-Outdoor .............................................................................................................26
Connecting the cable between indoor unit and outdoor unit ...................................................................27
Connect the Cable....................................................................................................................................27
Checking the drainage and forming the pipings........................................................................................29
Checking the Drainage.............................................................................................................................29
Form the Piping ........................................................................................................................................30
AIR PURGING ................................................................................................................................................31
Air purging ................................................................................................................................................31
Air purging with vacuum pump .................................................................................................................31
Test Running .................................................................................................................................................34
Operation .......................................................................................................................................................35
Function of Controls .................................................................................................................................35
Display Function ......................................................................................................................................39
Self-diagnosis Function ............................................................................................................................39
Remote Control Operations......................................................................................................................40
Disassembly ..................................................................................................................................................41
Indoor Unit................................................................................................................................................41
Troubleshooting Guide .................................................................................................................................44
Refrigeration Cycle Diagram ....................................................................................................................44
2-way, 3-way Valve .................................................................................................................................45
Cycle Parts ...............................................................................................................................................51
Electronic Parts ........................................................................................................................................52
Schematic Diagram.......................................................................................................................................62
Electric Control Device .............................................................................................................................62
Wiring Diagram.........................................................................................................................................65
Components Location ..............................................................................................................................67
Product Specifications .................................................................................................................................72
Exploded View...............................................................................................................................................74
Replacement Parts List ................................................................................................................................78