LG LA140CE User manual

LG Room
Air Conditioner
SERVICE MANUAL
LG
CAUTION
website http://www.lgservice.com
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
MODELS: LA140CE

2Room Air Conditioner
Air Conditioner Service Manual
TABLE OF CONTENTS
LG Model Name ...............................................................................................................................................3
Safety Precautions..........................................................................................................................................4
Dimensions .....................................................................................................................................................8
Symbols used in this Manual......................................................................................................................8
Indoor Unit..................................................................................................................................................9
Outdoor Unit...............................................................................................................................................9
Product Specifications ................................................................................................................................10
Installation .....................................................................................................................................................11
Select the Best Location .........................................................................................................................11
Piping Length and Elevation.....................................................................................................................11
Fixing Installation Plate ............................................................................................................................12
Drill a Hole in the wall...............................................................................................................................12
Flaring Work.............................................................................................................................................13
Connecting the Piping ..............................................................................................................................14
Connecting the Cables.............................................................................................................................19
Connection method of the connecting cable(Example)............................................................................20
Connect the cable to the indoor unit.........................................................................................................21
Checking the Drainage.............................................................................................................................22
Forming the Piping ...................................................................................................................................23
Air Purging ...............................................................................................................................................24
Test Running ............................................................................................................................................26
Operation ......................................................................................................................................................28
Function of Controls .................................................................................................................................28
Display Function.......................................................................................................................................34
Self-diagnosis Function............................................................................................................................34
Remote Control Operations......................................................................................................................35
Disassembly ..................................................................................................................................................36
Indoor Unit................................................................................................................................................36
Schematic Diagram.......................................................................................................................................39
Electric control Device..............................................................................................................................39
Wiring Diagram.........................................................................................................................................41
Components Location ..............................................................................................................................42
Troubleshooting Guide .................................................................................................................................46
Refrigeration Cycle Diagram ....................................................................................................................46
2-way, 3-way Valve ...................................................................................................................................47
Cycle Parts...............................................................................................................................................52
Electronic Parts ........................................................................................................................................53
Exploded View & Replacement Parts List .................................................................................................62
Indoor Unit...............................................................................................................................................63
Outdoor Unit............................................................................................................................................64

Service Manual 3
LG Model Name
12 - 345678910
Code Type Code of Model Meaning
1 Producing Center, A~Z L: Chang-won R22 N: India
Refrigerant A: Chang-won R410A Z: Brazil
C: Chang-won R407C D: Indonesia
T: China M: Mexico
K: Turkey R22 V: Vietnam
E: Turkey R410A S: Out Sourcing
H: Thailand
2 Product Type A~Z S: Split Type Air Conditioner
3 Cooling/Heating/Inverter A~Z C: Cooling only
H: Heat pump
X: C/O + E/Heater
Z: H/P + E/Heater
V: AC Inverter C/O
N: AC Inverter H/P
Q: DC Inverter C/O
W: DC Inverter H/P
4, 5 Capacity 0~9 Cooling/Heating Capacity
Ex. "09" →9,000 Btu/h
6 Electric Range 1~9 1: 115V/60Hz, A: 220V, 50Hz, 3Phase
A~Z 2: 220V/60Hz B: 208~230V, 60Hz, 3Phase
3: 208-230V/60Hz C: 575V, 50Hz, 3Phase
5: 200-220V/50Hz D: 440~460, 60Hz, 3Phase
6: 220-240V/50Hz E: 265V, 60Hz
7: 110V, 50/60Hz F: 200V, 50/60Hz
8: 380-415V/50Hz
9: 380-415V/60Hz
7 Chassis A~Z Name of Chassis of Unit
Ex. LSP →SP Chassis
8 Look A~Z Look,
Color (Artcool Model)
9 Function A~Z
10 Serial No. 1~9 LG Model De
* ARTCOOL COLOR
velopment Serial No.
Basic A
Basic+4Way B
Plasma Filter C
Plasma Filter+4 Way D
Tele+LCD E
Tele+LCD+Nano plasma+4Way F
Nano Plasma F+(A/changeove)+A/clean+Low A G
Nano Plasma F+(A/changeove)+A/clean+4way+Low A H
Tele+LED+4way I
Internet J
Plasma F+4Way+Oxy generator K
Nano Plasma F+(A/changeove)+A/clean L
Nano Plasma F+(A/changeove)+A/clean+4way M
Nano Plasma F+(A/changeove)+A/clean+PTC N
Nano Plasma F+(A/changeove)+Autoclean+4way+PTC P
Nano Plasma F+(A/changeove)+A/clean+4way+Low A+PTC Q
Negative ION+A/Clean R
(Nano)Plasma+Negative ION+A/Clean S
4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean T
Nano Plasma F+4Way+(A/changeove)+A/clean+ U
R Mirror
W White
B Blue
D Wood
M Metal
C Cherry
2003

4Room Air Conditioner
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
■Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
■Meanings of symbols used in this manual are as shown below.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
Be sure not to do.
Be sure to follow the instruction.
■Installation
Always perform grounding.
• Otherwise, it may cause electrical shock.
Don’t use a power cord, a plug or a loose socket
which is damaged.
• Otherwise, it may cause a fire or electrical shock.
For installation of the product, always contact the
service center or a professional installation agency.
• Otherwise, it may cause a fire, electrical shock,
explosion or injury.
Securely attach the electrical part cover to the
indoor unit and the service panel to the outdoor
unit.
• If the electrical part cover of the indoor unit and the
service panel of the outdoor unit are not attached
securely, it could result in a fire or electric shock due to
dust, water, etc.

Service Manual 5
Safety Precautions
Always install an air leakage
breaker and a dedicated switch-
ing board.
• No installation may cause a fire and
electrical shock.
Do not keep or use flammable
gases or combustibles near the
air conditioner.
• Otherwise, it may cause a fire or
the failure of product.
Ensure that an installation frame
of the outdoor unit is not dam-
aged due to use for a long time.
• It may cause injury or an accident.
Do not disassemble or repair the
product randomly.
• It will cause a fire or electrical
shock.
Do not install the product at a
place that ther is concern of
falling down.
• Otherwise, it may result in personal
injury.
Use caution when unpacking and
installing.
• Sharp edges may cause injury.
Do not share the outlet with
other appliances.
• It will cause an electric shock or a
fire due to heat generation.
Do not use the damaged power
cord.
• Otherwise, it may cause a fire or
electrical shock.
Do not modify or extend the
power cord randomly.
• Otherwise, it may cause a fire or
electrical shock.
Take care so that the power cord
may not be pulled during opera-
tion.
• Otherwise, it may cause a fire or
electrical shock.
Unplug the unit if strange
sounds, smell, or smoke comes
from it.
• Otherwise, it may cause electrical
shock or a fire.
Keep the flames away.
• Otherwise, it may cause a fire.
■Operation
Wax
Thinner