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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Th3
Th4
Field Piping
3 rooms model
3 rooms model
Gas
Field Piping
Liquid
Refrigerant Flow
Room B
Room A
Room B
Room C
Room A
Cooling
Heating
Low Pressure
S/W
Th1
LEV-A
LEV-B
T
h3
Accumulator
Compressor
Heat
Exchanger
Header
OUTDOOR UNIT
Reversing
Valve
T
h3
Room C
LEV-C
Th2
Drier
1. A2UW146F
A0/1/2, A2UW166F
A0/1, A2UW186F
A0, A3UW186F
A0/1
T
roubleshooting Guide
T
r
oubleshooting Guide
Refrigeration Cycle Dia
gram
178
180
Table of Contents
Default Chapter
2
Table of Contents
2
Model Number Nomenclature
3
Symbols Used in this Manual
5
Safety Precautions
6
Dimensions
12
Indoor Unit
12
Duct Type
14
Outdoor Unit
21
Product Specifications
22
Installation
34
Select the Best Location of Indoor Unit
34
How to Fix
37
Fixing Indoor Unit
39
Installation of Unit
44
Piping and Drainage of Indoor Unit
45
Connection of Indoor Unit Piping
46
For Right Rear Piping
51
Ceiling Mounting
58
Drill a Hole in the Wall
59
Drain Hose
60
Indoor Unit Installation
66
Remote Controller Installation
69
Connecting Pipings and the Cable to Outdoor Unit
71
Electric Characteristics
72
Checking the Drainage and Pipe Forming
74
Drain Piping
76
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
Sleep Timer Operation
96
Forced Operation
97
Function of Indoor Unit
98
Function of Outdoor Unit
104
Remote Control Operation
105
Wiring Design
109
Control Devices and Function
114
Simple Central Control
114
Term of each Part and Function
114
Electrical Wiring
115
Test Run Method
118
Rotary Switch
120
Deluxe Central Control
121
System Configuration
126
Main Specifications
126
Control System
126
Disassembly of the Parts (Indoor Unit)
127
Indoor Unit
127
Caution Label
137
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
Pumping down
210
Gas Charging
212
Exploded View
213
Indoor Unit
213
Outdoor Unit
242
Copyright ©2007 LG Electronics. Inc. All Right Reserved
242
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LG AMNH12GD4L0 Specifications
General
Brand
LG
Model
AMNH12GD4L0
Category
Air Conditioner
Language
English
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