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LMU300HHV
LG LMU300HHV Service Manual
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Please r
ead this manual car
efully befor
e oper
ating
your set and r
etain it for futur
e r
efer
enc
e.
Gener
al
Multi-Inverter T
ype
P/NO : MFL68280204
SERVICE MANUAL
AIR
C
ONDITIONER
2
Table of Contents
Table of Contents
2
Part 1 General Information
3
Safety Precautions
4
Model Line up
7
Nomenclature
10
Part 2 Functions & Controls
14
List of Functions & Accessory
15
Air Flow
17
Auto Swing (Left & Right)
17
Auto Swing (up & Down)
17
Chaos Swing (Up/Down)
17
Air Flow Step
18
Chaos Wind (Auto Wind)
18
Jet Cool Mode Operation
18
Swirl Wind Swing
18
Air Purifying
19
PLASMA Air Purifying System
19
External Static Pressure) Setting
20
Installation Functions
20
Hot Start
21
Reliability
21
Self-Diagnosis Function
21
Soft Dry Operation
21
Convenience Functions & Controls
22
Cooling & Heating Operations
22
Auto Cleaning Operation
23
Auto Operation (Artificial Intelligence)
23
Auto Restart Opeartion
24
Child Lock Function
25
Forced Operation
25
Group Control
26
Sleep Timer Operation
27
Timer(On/Off)
27
Weekly Program
27
Two Thermistor Control
28
Auto Elevation Grille
29
Low Ambient Control
29
Space Control
29
Special Function & KIT
29
Defrost Control(Heating)
31
Part 3. Basic Control
32
Part 3 Basic Control
32
Compressor Control
33
EEV( Electronic Expansion Valve) Control
33
Normal Operation
33
Defrost Control
34
Oil Return Control
34
Discharge Temperature Control
35
High Pressure Protection Control
35
Input Current Control
35
Low Pressure Protection Control
35
Protection Control
35
Part 4 Test Run
36
Check before Test Run
37
Test Run Flow Chart
38
Test Runing
39
Part 5. Trouble Shooting
41
Part 5 Trouble Shooting Guide
41
Error Indicator (Indoor)
42
Self-Diagnosis Function
42
Error Indicator (Outdoor)
43
Pump down
44
Evacuation
45
Gas Charging
46
Cycle Part
47
Electronic Parts
48
The Product Doesn T Operate at All
48
The Compressor/Outdoor Fan Are Don't Operate
49
The Product Doesn't Operate with the Remote Controller
49
When Indoor Fan Does Not Operate
51
When the Louver Does Not Operate
52
Troubleshooting Indoor Error
53
Troubleshooting Outdoor Error
59
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LG LMU300HHV Specifications
General
Refrigerant
R410A
Phase
1
Voltage
208-230V
Power Supply
208-230V/60Hz/1Phase
Operating Temperature (Heating)
75 °F
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