LG AS-W096ERH0 User manual

Universal Air Conditioner
SVC MANUAL(Exploded View)
MODEL : AS-W096ERH0
AS-W096EBH0
AS-W096EVH0
AS-W126ERH0
AS-W126EBH0
AS-W126EVH0
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

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Air Conditioner Service Manual
TABLE OF CONTENTS
LG Model Name.................................................................................................................................3
Safety Precautions ...........................................................................................................................5
Dimensions .....................................................................................................................................10
Installation.......................................................................................................................................12
Flaring work and connection of piping.........................................................................................14
Connecting the cable between indoor unit and outdoor unit.....................................................19
Checking the drainage and forming the pipings .........................................................................21
Air purging ......................................................................................................................................22
Test running ....................................................................................................................................24
Functions.........................................................................................................................................25
Operation.........................................................................................................................................28
Disassembly....................................................................................................................................41
Troubleshooting Guide ..................................................................................................................44
Schematic Diagram ........................................................................................................................64
Product Specifications ..................................................................................................................69
Exploded View ................................................................................................................................70

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
LG Model Name
LG Model Name
2003
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. 0~9 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
N Walnut
A Gogh
S Sisley
Q Quran
K Mecca

- 4 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
LG Model Name
2004~
12 - 345678910
Code Type Code of Model Meaning
1 Producing Center, A~Z
L Chang_won R22
A Chang_won R410A
C Chang_won R407C
T China
K Turkey R22
E Turkey R410A
H Thailand
N India
Z Brazil
D Indonesia
X Mexico
V Vietnam
S Out sourcing
Refrigerant
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
CHASSIS Look
D
K
L
G
M
N
D
P
Division
Panel Type(Deluxe)
Fighting 'Look'
(LG1)
(LG2)-SEMI PANEL
OEM1
OEM2
Panel Type(Deluxe)
LG3
, 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. 0~9 LG Model De
* ARTCOOL COLOR
velopment Serial No.
R Mirror
B Blue
V Silver
S4/S5
S6
SQ
SR
ST
SE
Basic A
Basic+4Way B
Plasma Filter C
Plasma Filter+4 Way D
Tele+LCD E
Tele+LCD+Nano plasma+4Way F
NBF F+(A/changeove)+A/clean+Low A G
NBF F+(A/changeove)+A/clean+4way+Low A H
Tele+LED+4way I
Internet J
Plasma F+4Way+Oxy generator K
NBF F+(A/changeove)+A/clean L
NBF F+(A/changeove)+A/clean+4way M
NBF F+(A/changeove)+A/clean+PTC N
NBF F+(A/changeove)+Autoclean+4way+PTC P
NBF F+(A/changeove)+A/clean+4way+Low A+PTC Q
(Nano)Plasma+ION+A/Clean S
4way+(Nano)Plasma F+
Negative ION+Healthy dehumidification +A/Clean T
Nano Plasma F+4Way+(A/changeove)+A/clean+Oxy generator U
4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean+Oxy generator V
Dry contact W
Wire remocon 8

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Safety Precautions
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.
Do not use damaged power cords, plugs, or a
loose socket.
Always use the power plug and socket with the
ground terminal.
• There is risk of fire of electric shock. • There is risk of electric shock.
Install the panel and the cover of control box
securely.
Do not modify or extend the power cord.
• There is risk of fire of electric shock. • No grounding may cause electric shock.
■Installation

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Safety Precautions
Do not install the product on a defective instal-
lation stand.
Be sure the installation area does not
deteriorate with age.
• It may cause injury, accident, or damage to the
product.
• If the base collapses, the air conditioner could fall
with it, causing property damage, product failure,
and personal injury.
• Sharp edges could cause injury. Be especially care-
ful of the case edges and the fins on the condenser
and evaporator.
• There is risk of fire, electric shock, explosion, or injury.
Be cautious when unpacking and installing the
product.
For installation, always contact the dealer or
an Authorized service center
For re-installation of the installed product,
always contact a dealer or an authorized ser-
vice center.
Do not install, remove, or re-install the unit by
yourself.
• There is risk of fire, electric shock, explosion, or
injury.
• There is risk of fire, electric shock, explosion, or
injury.

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Safety Precautions
■Operation
Do not turn the air-conditioner ON or OFF by
plugging or unplugging the power plug.
Use a dedicated outlet for this appliance.
• There is risk of fire or electrical shock. • There is risk of fire or electrical shock.
Grasp the plug to remove the cord from the
outlet. Do not touch it with wet hands.
Do not place a heater or other appliances near
the power cable.
• There is risk of fire or electrical shock. • There is risk of fire and electric shock.
Do not allow water to run into electrical parts. Do not store or use flammable gas or com-
bustibles near the air conditioner.
• There is risk of fire, failure of the product, or electric
shock.
• There is risk of fire or failure of product.
Wax
Thinner

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Always check for gas (refrigerant) leakage after
installation or repair of product.
Install the drain hose to ensure that water is
drained away properly.
• Low refrigerant levels may cause failure of product. • A bad connection may cause water leakage.
Keep level even when installing the product. Use two or more people to lift and transport
the air conditioner.
• To avoid vibration or water leakage. • Avoid personal injury.
■Installation
90˚
Unplug the unit if strange sounds, odors, or
smoke comes from it.
Be cautious that water could not enter the
product.
•There is risk of electric shock or fire. •There is risk of fire, electric shock, or product dam-
age.
Safety Precautions

- 9 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Use a soft cloth to clean. Do not use harsh
detergents, solvents, etc.
Do not touch the metal parts of the product
when removing the air filter. They are very
sharp!
•There is risk of fire, electric shock, or damage to the
plastic parts of the product.
•There is risk of personal injury.
Do not step on or put anyting on the product.
(outdoor units)
Do not insert hands or other objects through
the air inlet or outlet while the air conditioner
is plugged in.
•There is risk of personal injury and failure of product. •There are sharp and moving parts that could cause
personal injury.
■Operation
Wax
Safety Precautions

- 10 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Dimensions
Dimensions
Installation plate
D
H
W
W mm 915
H mm 282
D mm 165
Model
Dimension
9k, 12k Btu Series
Indoor Unit
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that could cause harm to the
air conditioner.
This symbol indicates special notes.
NOTICE
Symbols Used in this Manual

WL2
L3
L1
D
H
L4
L5
Gas side
(3-way valve)
Liquid side
(2-way valve)
MODEL
DIM unit
W mm 770
H mm 540
D mm 245
L1 mm 285
L2 mm 65
L3 mm 518
L4 mm 10
L5 mm 100
Dimensions
Outdoor Unit
9k, 12k Btu Series
- 11 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Installation
Installation
Indoor unit
•Do not have any heat or steam near the unit.
•Select a place where there are no obstacles in front of the
unit.
•Make sure that condensation drainage can be conveniently
routed away.
Do not install near a doorway.
•Ensure that the space around the left and right of the unit is
more than "A". The unit should be installed as high on the
wall as possible, allowing a minimum of "B" from ceiling.
•Use a stud finder to locate studs to prevent unnecessary
damage to the wall.
Outdoor unit
•If an awning is built over the unit to prevent direct sunlight
or rain exposure, make sure that heat radiation from the
condenser is not restricted.
•Ensure that the space around the back and sides is more
than 10cm. The front of the unit should have more than
70cm of space.
•Do not place animals and plants in the path of the warm air.
•Take the air conditioner weight into account and select a
place where noise and vibration are minimum.
•Select a place so that the warm air and noise from the air
conditioner do not disturb neighbors.
Rooftop Installations:
•If the outdoor unit is installed on a roof structure, be
sure to level the unit. Ensure the roof structure and
anchoring method are adequate for the unit location.
•Consult local codes regarding rooftop mounting.
More than 20cm
More than
10cm
More than 1.5m
More than
10cm
•Capacity is based on standard length and maxi-
mum allowance length is on the basis of reliability.
•Oil trap should be installed every 5~7 meters.
Grade Clearance(cm)
AB
5K~28K 10 5
30K~38K 30 12
Pipe Size
Capacity
(Btu/h) GAS LIQUID
Max.
Length
A (m)
Additional
Refrigerant
(g/m)
Max.
Elevation
B(m)
Standard
Length
(m)
5k~14k 3/8"(Ø9.52) 1/4"(Ø6.35) 4 or 7.5 7 15 20
1/2"(Ø12.7) 1/4"(Ø6.35) 4 or 7.5 7 15 20
1/2"(Ø12.7) 1/4"(Ø6.35) 4 or 7.5 15 30 20
18k~28k 5/8"(Ø15.88) 1/4"(Ø6.35) 4 or 7.5 15 30 20
5/8"(Ø15.88) 3/8"(Ø9.52) 4 or 7.5 15 30 30
30k~38k 5/8"(Ø15.88) 3/8"(Ø9.52) 7.5 15 30 30
3/4"(Ø19.05) 3/8"(Ø9.52) 7.5 15 30 50
If case more than 5m
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
A
Oil trap
Outdoor unit
Indoor unit
B
If piping length is more than 5m
Selection of the Best Location
Piping Length and Elevation
Install the indoor unit on the wall where the height
from the floors more than 1.5 meters.
More than 30cm More than 30cm
More
than 60cm
More than 60cm
More than 70cm

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Installation
The wall you select should be strong and solid
enough to prevent vibration
1. Mount the installation plate on the wall with four
type A screws. If mounting the unit on a concrete
wall, use anchor bolts.
•Mount the installation plate horizontally by aligning
the centerline using a level.
2. Measure the wall and mark the centerline. It is
also important to use caution concerning the
location of the installation plate-routing of the
wiring to power outlets is through the walls typi-
cally. Drilling the hole through the wall for pip-
ing connections must be done safely.
•Drill the piping hole with a ø70mm hole core drill.
Drill the piping hole at either the right or the left
with the hole slightly slanted to the outdoor side.
•Open the Front Grille.
•Pass Telephone Control Cord Wire through the hole
which the power cord goes through.
•Connect Telephone Control Cord Wire to the phone jack
of telephone PCB of Control Box.
•Fix Telephone Control Cord Wire inside Control box so
as not to disconnect.
•Close the Front Grille.
How to Fix Installation Plate Drill a Hole in the Wall
Drain hose junction
•Remove the rubber stopple in the desired drain direc-
tion.
•Insert drain hose into the handle of drain pan, and join
drain hose and connecting hose according to the figure
by.
5-7mm
(3/16"~5/16")
Indoor
WALL
Outdoor
Installation plate
Left rear piping Right rear piping
Ø70mm Ø70mm
DB
A
C
Connecting
part
Adhesive
Drain
hose
Chassis
Hook
Installation Plate
Only the
desired direction
ABCD
7k, 9k, 12k, 14k 75 65 105 65
18k, 24k 105 65 260 65
CHASSIS
(Grade)
Distance (mm)

- 14 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Flaring work and connection of piping
Flaring work and connection of piping
Flaring work
Flaring work
Main cause for refrigerant leakage is due to defect in the
flaring work. Carry out correct flaring work using the follow-
ing procedure.
Cut the pipes and the cable.
•Use the piping kit accessory or pipes purchased locally.
•Measure the distance between the indoor and the outdoor unit.
•Cut the pipes a little longer than the measured distance.
•Cut the cable 1.5m longer than the pipe length.
Check
•Compare the flared work with figure below.
•If flare is noted to be defective, cut off the flared sec-
tion and re-flare it.
•Preparing the indoor unit's piping and drain hose for instal-
lation through the wall.
•Remove the plastic tubing retainer(see illustration below)
and pull the tubing and drain hose away from chassis.
•Replace the plastic tubing holder in the original
position.(Optional)
•Carry out flaring work using flaring tool as shown below.
Burr removal
•Completely remove all burrs from the cut cross section of
pipe/tube.
•Put the end of the copper tube/pipe in a downward direc-
tion as you remove burrs in order to avoid dropping burrs
into the tubing.
Putting nut on
•Remove flare nuts attached to indoor and outdoor unit,
then put them on pipe/tube having completed burr removal.
(not possible to put them on after flaring work)
Flaring work
•Firmly hold copper pipe in a die in the dimension shown in
the table above.
Copper
pipe
90°Slanted Uneven Rough
Bar
Copper pipe
Clamp handle Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Inclined
Inside is shiny without scratches
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
Pipe
Reamer
Point down
Flare nut
Copper tube
Drain hose
mm inch mm
Ø6.35 1/4" 1.1~1.3
Ø9.52 3/8" 1.5~1.7
Ø12.7 1/2" 1.6~1.8
Ø15.88 5/8" 1.6~1.8
Ø19.05 3/4" 1.9~2.1
Outside diameter A
Connection of piping -- Indoor
When install, make sure that the
remaining parts must be removed
clearly so as not to damage the pip-
ing and drain hose, especially power
cord and connecting cable.

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Flaring work and connection of piping
Route the indoor tubing and the drain hose in the direction of
rear right.
Vinyl tape(narrow)
Connection
pipe
Connecting cable
Vinyl tape
(wide) Wrap with vinyl tape
Indoor
unit pipe
Pipe
Plastic bands Insulation material
Vinyl tape(narrow)
Adhesive
Drain pipe
Indoor unit drain hose
Wrench
Indoor unit tubing
Open-end wrench (fixed)
Connection pipe
Flare nut
Indoor unit tubing Flare nut Pipes
Drain hose
Connecting
pipe
Connecting cable
Tape
Drain hose
Drain hose
Connecting
cable
Insert the connecting cable into the indoor unit from the out-
door unit through the piping hole.
•Do not connect the cable to the indoor unit.
•Make a small loop with the cable for easy connection later.
Tape the tubing, drain hose, and the connecting cable. Be
sure that the drain hose is located at the lowest side of the
bundle. Locating at the upper side can cause drain pan to
overflow inside the unit.
NOTE: If the drain hose is routed inside the room, insulate
the hose with an insulation material* so that dripping from
"sweating"(condensation) will not damage furniture or floors.
*Foamed polyethylene or equivalent is recommended.
Indoor unit installation
•Hook the indoor unit onto the upper portion of the installa-
tion plate.(Engage the two hooks of the rear top of the
indoor unit with the upper edge of the installation plate.)
Ensure that the hooks are properly seated on the installa-
tion plate by moving it left and right.
Press the lower left and right sides of the unit against the
installation plate until the hooks engage into their slots(click-
ing sound).
Connecting the pipings to the indoor unit and
drain hose to drain pipe.
•Align the center of the pipes and sufficiently tighten
the flare nut by hand.
•Tighten the flare nut with a wrench.
•When extending the drain hose at the indoor unit, install the
drain pipe.
Wrap the insulation material around the con-
necting portion.
•Overlap the connection pipe insulation material and the
indoor unit pipe insulation material. Bind them together with
vinyl tape so that there is no gap.
•Wrap the area which accommodates the rear piping hous-
ing section with vinyl tape.
mm inch kgf.m
Ø6.35 1/4" 1.8~2.5
Ø9.52 3/8" 3.4~4.2
Ø12.7 1/2" 5.5~6.6
Ø15.88 5/8" 6.3~8.2
Ø19.05 3/4" 9.9~12.1
Outside diameter Torque
For right rear piping

- 16 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Flaring work and connection of piping
•Bundle the piping and drain hose together by wrapping
them with vinyl tape for enough to cover where they fit into
the rear piping housing section.
Connecting the pipings to the indoor unit and
the drain hose to drain pipe.
•Align the center of the pipes and sufficiently tighten the
flare nut by hand.
•Tighten the flare nut with a wrench.
•When extending the drain hose at the indoor unit, install the
drain pipe.
Wrap the insulation material around the con-
necting portion.
•Overlap the connection pipe heat insulation and the indoor
unit pipe heat insulation material. Bind them together with
vinyl tape so that there is no gap.
Route the indoor tubing and the drain hose to
the required piping hole position.
Insert the piping, drain hose, and the connect-
ing cable into the piping hole.
Insert the connecting cable into the indoor unit.
•Don't connect the cable to the indoor unit.
•Make a small loop with the cable for easy connection later.
Indoor unit installation
•Hang the indoor unit from the hooks at the top of the instal-
lation plate.
•Insert the spacer etc. between the indoor unit and the
installation plate and separate the bottom of the indoor unit
from the wall.
Tape the drain hose and the connecting cable.
•Connecting cable
Drain pipe
Connecting cable
Wrap with vinyl tape
Drain hose
Pipe
Vinyl tape(wide)
Indoor unit tubing Flare nut Pipes
Plastic bands Insulation material
Vinyl tape
Adhesive
Drain hose
Indoor unit drain hose
(narrow)
Wrench
Indoor unit tubing
Connection pipe
Flare nut
Open-end wrench (fixed)
Installation plate
Spacer
Indoor unit
8cm
For left rear piping
mm inch kgf.m
Ø6.35 1/4" 1.8~2.5
Ø9.52 3/8" 3.4~4.2
Ø12.7 1/2" 5.5~6.6
Ø15.88 5/8" 6.3~8.2
Ø19.05 3/4" 9.9~12.1
Outside diameter Torque

- 17 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Installation Information (For left piping)
•Good case
For left piping. Follow the instruction below.
•Press on the upper side of clamp. ( )
Flaring work and connection of piping
•Wrap the area which accommodates the rear piping hous-
ing section with vinyl tape.
Indoor unit installation
•Remove the spacer.
•Ensure that the hooks are properly seated on the installa-
tion plate by moving it left and right.
Press the lower left and right sides of the unit against the
installation plate until the hooks engage into their
slots(clicking sound).
•Bundle the piping and drain hose together by wrapping
them with cloth tape over the range within which they fit
into the rear piping housing section.
Reroute the pipings and the drain hose across
the back of the chassis.
Set the pipings and the drain hose to the back
of the chassis with the tubing holder.
•Hook the edge of tubing holder to tap on chassis and push
the bottom of tubing holder to be engaged at the bottom of
chassis.
Vinyl tape(narrow)
Connection
pipe
Connecting cable
Indoor
unit piping
Pipe
Vinyl tape
(wide) Wrap with vinyl tape
Drain hose
Vinyl tape(narrow)
Pipe
Wrap with
vinyl tape(wide)
Piping for
passage through
piping hole
Tubing holder
Drain hose
Connecting
cable
•Unfold the tubing to downward slowly. ( )
•Bend the tubing to the left side of chassis.

- 18 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Flaring work and connection of piping
Align the center of the pipings and sufficiently
tighten the flare nut by hand.
Finally, tighten the flare nut with torque wrench
until the wrench clicks.
•When tightening the flare nut with torque wrench, ensure
the direction for tightening follows the arrow on the wrench.
•Bad case
•Following bending type from right to left could cause
problem of pipe damage.
Connection of the pipes-Outdoor
mm inch kgf.m
Ø6.35 1/4" 1.8~2.5
Ø9.52 3/8" 3.4~4.2
Ø12.7 1/2" 5.5~6.6
Ø15.88 5/8" 6.3~8.2
Ø19.05 3/4" 9.9~12.1
Outside diameter Torque
Outdoor unit
Gas side piping
(Bigger diameter)
Liquid side
piping
(Smaller
diameter)
Torque wrench

- 19 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Connect the cable to the Indoor unit.
Connecting the cable between indoor unit and outdoor unit
Connecting the cable between indoor unit and outdoor unit
Connect the cable to the indoor unit by connecting the wires to the terminals on the control board individually
according to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and the terminal No.
are the same as those of the indoor unit.)
•The above circuit diagram is subject to change without notice.
•The earth wire should be longer than the common wires.
•When installing, refer to the circuit diagram behind the panel front of the indoor unit.
•Connect the wires firmly so that they may not be pulled out easily.
•Connect the wires according to color codes, referring to the wiring diagram.
If a power plug is not used, provide a circuit
breaker between power source and the unit as
shown by.
The power cord connected to the "A" unit should be selected according to the following specifications(Type "B"
approved by HAR or SAA).
The power connecting cable connecting the indoor and outdoor unit should be selected according to the following
specifications (Type "B" approved by HAR or SAA).
Air
Conditioner
Main power source
7k 9k~14k 18k 24k
0.75 1.0 1.5 2.5
Unit(A) Indoor Indoor Indoor Indoor
Cable Type(B) H05VV-F H05VV-F H05VV-F H05VV-F
NORMAL CROSS
-SECTIONAL AREA
Grade
(mm2)
7k 9k~14k 18k 24k
0.75 1.0 1.5 2.5
Cable Type(B) H07RN-F H07RN-F H07RN-F H07RN-F
NORMAL CROSS
-SECTIONAL AREA
Grade
(mm2)
Circuit Breaker
Use a circuit
breaker or time
delay fuse.

- 20 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Connecting the cable between indoor unit and outdoor unit
Remove the control cover from the unit by
loosening the screw.
Connect the wires to the terminals on the con-
trol board individually.
Secure the cable onto the control board with
the cord clamp.
Refix the control cover to the original position
with the screw.
Use a recognized circuit breaker "A"
between the power source and the unit.
A disconnecting device to adequately discon-
nect all supply lines must be fitted.
Terminal block
Over 5mm
Cover control
Connecting cable
Connecting cable
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have an individual power circuit specifically for the air conditioner. As for the method of wiring,
be guided by the circuit diagram posted on the inside of control cover.
2) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations
to which the unit is subjected during the course of transportation. Check them and make sure that they are
all tightly fastened. (If they are loose, it could cause burn-out of the wires.)
3) Specification of power source.
4) Confirm that electrical capacity is sufficient.
5) See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the
name plate.
6) Confirm that the cable thickness is as specified in the power source specification.
(Particularly note the relation between cable length and thickness. (Refer to page 21))
7) Always install an earth leakage circuit breaker in a wet or moist area.
8) The following would be caused by voltage drop.
•Vibration of a magnetic switch, which will damage the contact point, fuse breaking, disturbance of the normal func-
tion of the overload.
9) The means for disconnection from a power supply shall be incorporated in the fixed wiring and have an air
gap contact separation of at least 3mm in each active(phase) conductors.
Outdoor Unit
Connect the cable to the outdoor unit
5k~14k 18k 24k~28k 30k, 32k 36k, 38k
15 20 30 30 40
Circuit
Breaker
(A)
Grade