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CT18F NQ0
LG CT18F NQ0 User Manual
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Part 4 T
rouble Shooting
- 81
-
Copyright © 2019 - 2020 LG Electronics Inc.
All rights reserved. Only training and service purposes.
RED
BLACK
T
S
R
T
DC_
L
i
nk
IGBT
M
GN
D
P
U
V
W
7 kW (U3)
Check Point
Multi Meter
Measured value
Mode
BLACK
RED
Normal
Abnormal
IGBTM
High side Didoe
DC_Link
R
0.35 V
~
0.7 V
Non-normal
S
T
IGBTM
Low side Didoe
R
IGBTM
GND
S
T
IGBTM
Hige side IGBT
P
U
V
IGBTM
Low side IGBT
W
U
IGBTM
GND
V
W
n
IPM Check Point
80
82
Table of Contents
Table of Contents
2
Part 1 General Information
3
Safety Precautions
4
Model Line up
13
Nomenclature
16
Part 2 Functions & Controls
20
1 List of Functions & Accessory
21
2 Air Flow
32
Auto Swing (Left & Right)
32
Auto Swing (up & Down)
32
Chaos Swing (Up/Down)
32
Air Flow Step
33
Chaos Wind (Auto Wind)
33
Jet Cool Mode Operation
33
Swirl Wind Swing
33
3 Installation Functions
34
External Static Pressure) Setting
34
High Ceiling Operation
38
4 Reliability
39
Hot Start
39
Self-Diagnosis Function
39
Soft Dry Operation
39
5 Convenience Functions & Controls
40
Cooling & Heating Operations
40
Auto Cleaning Operation
41
Auto Changeover Operation
41
Auto Restart Opeartion
41
Child Lock Function
42
Forced Operation
42
Group Control
43
Sleep Timer Operation
44
Timer(On/Off)
44
Weekly Program
45
Two Thermistor Control
47
6 Special Function & KIT
48
Low Ambient Control
48
Space Control
48
Part 3 Basic Control
49
Normal Operation
50
Compressor Control
50
EEV( Electronic Expansion Valve) Control
50
Table of Contents
51
1 Self-Diagnosis Function
52
Error Indicator (Indoor)
52
Error Indicator (Outdoor)
53
2 Pump down
54
Evacuation (All Amount of Refrigerant Leaked)
55
3 Evacuation
55
Gas Charging (after Evacuation)
56
4 Gas Charging
56
5 Cycle Part
57
6 Electronic Parts
58
The Product Doesn't Operate at All
58
The Product Doesn't Operate with the Remote Controller
59
The Compressor/Outdoor Fan Are Don't Operate
60
When Indoor Fan Does Not Operate
61
When the Louver Does Not Operate
62
Troubleshooting Indoor Error
63
Troubleshooting Outdoor Error
70
4
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LG CT18F NQ0 Specifications
General
Brand
LG
Model
CT18F NQ0
Category
Air Conditioner
Language
English
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