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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Multi type Air Conditioner Service Manual
TABLE OF CONTENTS
Model Number Nomenclature
....................................................................................................................3
Symbols Used in this Manual ...................................................................................................................5
Safety Precautions
......................................................................................................................................6
Dimensions
................................................................................................................................................12
Indoor Unit..............................................................................................................................................12
Outdoor Unit ...........................................................................................................................................21
Product Specifications
............................................................................................................................22
Installation
.................................................................................................................................................34
Select the best location of indoor unit ....................................................................................................34
How to fix ...............................................................................................................................................37
Piping and Drainage of Indoor Unit ........................................................................................................45
Connection of indoor unit piping.............................................................................................................46
Remote Controller Installation ................................................................................................................69
Connecting Pipings and the cable to Outdoor unit .................................................................................71
Checking the Drainage and Pipe forming...............................................................................................74
Maximum Length of Pipe and Extra Charge of Refrigerant Charge .......................................................79
Test Running ..........................................................................................................................................85
System Layout and Piping Length..........................................................................................................88
Installation ..............................................................................................................................................89
Installation of The Main Unit...................................................................................................................90
Connection of Piping ..............................................................................................................................91
Connection of Wiring ..............................................................................................................................92
Operation
..................................................................................................................................................93
Function of control..................................................................................................................................93
Function of Indoor Unit ...........................................................................................................................98
Function of Outdoor Unit ......................................................................................................................104
Remote Control Operation ...................................................................................................................105
Control Devices and Function
...............................................................................................................114
Simple Central Control .........................................................................................................................114
Term of Each part and Function ...........................................................................................................114
Electrical wiring ....................................................................................................................................115
Deluxe Central Control .........................................................................................................................121
Disassembly of the parts (Indoor unit)
.................................................................................................127
Indoor unit ............................................................................................................................................127
Schematic Diagram
.................................................................................................................................142
Electronic Control Device .....................................................................................................................142
Wiring Diagram.....................................................................................................................................154
Components Locations.........................................................................................................................160
Troubleshooting Guide
...........................................................................................................................179
Refrigeration Cycle Diagram ................................................................................................................179
Self-diagnosis Function ........................................................................................................................186
Cycle Troubleshooting Guide................................................................................................................187
Electronic Parts Troubleshooting Guide ...............................................................................................188
General Information..............................................................................................................................193
(3-way) Valve
...........................................................................................................................................209
Exploded View
.........................................................................................................................................213
Indoor Unit ...........................................................................................................................................213
Outdoor Unit ........................................................................................................................................24
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Summary of Contents for A2UW146FA0
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