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LMU24CHV
LG LMU24CHV Service Manual
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Multi Air Conditioner
SVC MANUAL(General)
MODEL : Multi-Inverter Type
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Internal Use Only
http://biz.lgservice.com
2
Table of Contents
Table of Contents
2
Part 1 General Information
3
Safety Precautions
4
Model Line up
7
Outdoor Units
8
Nomenclature
10
Part 2 Functions & Controls
12
1 List of Functions & Accessory
13
2 Air Flow
15
Auto Swing (Left & Right)
15
Auto Swing (up & Down)
15
Chaos Swing (Up/Down)
15
Air Flow Step
16
Chaos Wind (Auto Wind)
16
Jet Cool Mode Operation
16
Swirl Wind Swing
16
3 Air Purifying
17
PLASMA Air Purifying System
17
4 Installation Functions
18
External Static Pressure) Setting
18
5 Reliability
19
Hot Start
19
Self-Diagnosis Function
19
Soft Dry Operation
19
6 Convenience Functions & Controls
20
Cooling & Heating Operations
20
Auto Cleaning Operation
21
Auto Operation (Artificial Intelligence)
21
Auto Restart Operation
22
Child Lock Function
23
Forced Operation
23
Group Control
24
Sleep Timer Operation
25
Timer(On/Off)
25
Weekly Program
25
Two Thermistor Control
26
7 Special Function & KIT
27
Low Ambient Control
27
Space Control
27
Auto Elevation Grille
27
Defrost Control(Heating)
29
Part 3. Basic Control
30
Default Chapter
30
Part 3 Basic Control
30
1 Normal Operation
31
Compressor Control
31
3 EEV( Electronic Expansion Valve) Control
31
4 Oil Return Control
32
5 Defrost Control
32
6 Protection Control
33
High Pressure Protection Control
33
Low Pressure Protection Control
33
Discharge Temperature Control
33
Input Current Control
33
Part 4 Test Run
34
Check before Test Run
35
Test Run Flow Chart
36
Test Running
37
Ceiling Cassette Type
38
Part 5 Trouble Shooting Guide
39
1 Self-Diagnosis Function
40
Error Indicator (Indoor)
40
Error Indicator (Outdoor)
41
2 Pump down
42
3 Evacuation
43
4 Gas Charging
44
5 Cycle Part
45
6 Electronic Parts
46
The Product Doesn T Operate at All
46
The Product Doesn't Operate with the Remote Controller
47
The Compressor/Outdoor Fan Are Don't Operate
48
When Indoor Fan Does Not Operate
49
When the Louver Does Not Operate
50
Troubleshooting Indoor Error
51
Troubleshooting Outdoor Error
57
Part 6 Service Order
111
PCB Service Order
112
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Installation Manual
361 pages
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LG LMU24CHV Specifications
General
Cooling Capacity
24000 BTU/h
Heating Capacity
27000 BTU/h
Refrigerant
R410A
Voltage
208/230V
Power Supply
208/230V, 60Hz
Outdoor Unit Noise Level
54 dB
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