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CT18F NQ0
LG CT18F NQ0 User Manual
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Part 4 T
rouble Shooting
- 96
-
Copyright © 2019 - 2020 LG Electronics Inc.
All rights reserved. Only training and service purposes.
Items for
checking
Sub-items for
checking
Checking
power source
Checking
for
over-lo
a
d
oper
a
tion
Checking
compressor
Checking
PCBA
Checking
input volt
a
ge
Checking
outdoor
devices for
shielding
Checking
refriger
a
nt
for over/shorts
Checking
compressor
wiring
Checking input
current
detection
circuit
Checking
power
connection
st
a
te
Checking
outdoor
f
a
n oper
a
tion
Checking
compressor
Ph
a
se resis-
t
a
nce
Checking
pipes
for Bending /
blocking
Checking
compressor
insul
a
tion
resist
a
nce
Checking EEV
for motion
❈
Check for AC190~260 V
❈
Check the manifold gauge pressure
Flow of trouble diagnosis
6.7 T
roubleshooting Outdoor Error
CH 22 (Input of Over Current)
95
97
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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