LG
LG Room
Air Conditioner
SERVICE MANUAL
MODELS: AS-W096URH0/UBH0/UWH0/UMH0
AS-W126URH0/UBH0/UWH0/UMH0/UCH0
AS-W096URH1/UBH1/UWH1/UMH1
AS-W126URH1/UBH1/UWH1/UMH1
CAUTION
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
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LG Model Name
2002
3
4
5
6
7
8
9
1
2
-
Code
1,2
3
Type
Code of Model
Meaning
Type of Airconditioner
Chassis
A~Z
A~Z
LS: LG Split Type Airconditioner
Name of toll of Unit
Ex. LS-R ➔ S R Chassis
Cooling/Heating Capacity
Ex. "09" ➔ 9,000Btu/h
4,5
6
Capacity(Btu/h)
1~9
1~9
Electric Range
Electric Standard
1 ➔ 115V/60Hz
6 ➔ 220~240V/50Hz
2 ➔➔220V/60Hz
3 ➔ 208~230V/60Hz
5 ➔ 200~220V/50Hz
7 ➔ 110V, 50/60Hz
8 ➔ 380~415V/50Hz
9 ➔ 380~415V/60Hz
Basic
Plasma Filter
Auto Swing + Plasma Filter
Telephone + LED Display
A
0
1
2
3
4
5
6
7
8
7
Serial No.
0~9
A~Z
B
C
D
E
F
G
H
J
Telephone + LCD Display
Auto Swing + Plasma Filter + Telephone + LCD
Low Ambient + Ambient/change
Plasma Filter + Low Ambient + Ambient/change
Internet
Auto Swing + Plasma Filter + Oxygen Generator
Auto Swing + Soft Start
Auto Swing + Star Rating
Auto Swing + Star Rating + Plasma Filter
Auto Swing + Soft Start + Star Rating
Auto Swing + Soft Start + Star Rating 4 + Plasma
Auto Swing + Telephone + LCD
Auto Swing + Telephone + LCD + Soft Start
K
L
9
Z
Y
X
W
V
U
T
M
N
P
Q
R
S
HFC+AC HFC+DC
8
Cooling/Heating
A~Z
UNIT
R22
HFC
R22+AC INV.
INV.
INV.
INDOOR
BASIC
OUTDOOR
C/O
C
H/P E/H+C/O E/H+H/P C/O
H/P
R
P
S
-
C/O
V
H/P
N
H/P
H/P
BASIC
GOLD FIN
GOLD FIN
BASIC
H
B
E
J
X
5
7
-
Y
6
8
-
F
M
Q
-
BASIC
A
W
1
Y
T
U
PLASMA
PLASMA
GOLD FIN
D
2
G
3
4
GOLD FIN
K
L
-
-
-
-
9
LG/OEM Brand
A~Z
L: LG Brand
G: 2nd LG Brand
M: 1st OEM Brand
N: 2nd OEM Brand
Service Manual 3
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2003~2005
1
2
-
3
4
5
6
7
8
9
10
Code
Type
Code of Model
Meaning
L: Chang-won R22
A: Chang-won R410A
C: Chang-won R407C
T: China
1
Producing Center,
Refrigerant
A~Z
N: India
Z: Brazil
D: Indonesia
M: Mexico
V: Vietnam
S: Out Sourcing
K: Turkey R22
E: Turkey R410A
H: Thailand
2
3
Product Type
A~Z
A~Z
S: Split Type Air Conditioner
Cooling/Heating/Inverter
C: Cooling only
H: Heat pump
V: AC Inverter C/O
N: AC Inverter H/P
Q: DC Inverter C/O
W: DC Inverter H/P
X: C/O + E/Heater
Z: H/P + E/Heater
4, 5
6
Capacity
0~9
Cooling/Heating Capacity
Ex. "09" ➔ 9,000 Btu/h
Electric Range
1~9
A~Z
1: 115V/60Hz,
2: 220V/60Hz
A: 220V, 50Hz, 3Phase
B: 208~230V, 60Hz, 3Phase
C: 575V, 50Hz, 3Phase
D: 440~460, 60Hz, 3Phase
E: 265V, 60Hz
3: 208-230V/60Hz
5: 200-220V/50Hz
6: 220-240V/50Hz
7: 110V, 50/60Hz
8: 380-415V/50Hz
9: 380-415V/60Hz
F: 200V, 50/60Hz
7
Chassis
A~Z
Name of Chassis of Unit
Ex. LSP ➔ SP Chassis
8
9
Look
A~Z
A~Z
Look,
Color (Artcool Model)
Function
Basic
A
B
C
D
E
F
G
H
I
Basic+4Way
Plasma Filter
Plasma Filter+4 Way
Tele+LCD
Tele+LCD+Nano plasma+4Way
Nano Plasma F+(A/changeove)+A/clean+Low A
Nano Plasma F+(A/changeove)+A/clean+4way+Low A
Tele+LED+4way
Internet
J
Plasma F+4Way+Oxy generator
K
L
Nano Plasma F+(A/changeove)+A/clean
Nano Plasma F+(A/changeove)+A/clean+4way
Nano Plasma F+(A/changeove)+A/clean+PTC
Nano Plasma F+(A/changeove)+Autoclean+4way+PTC
Nano Plasma F+(A/changeove)+A/clean+4way+Low A+PTC
Negative ION+A/Clean
(Nano)Plasma+Negative ION+A/Clean
4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean
Nano Plasma F+4Way+(A/changeove)+A/clean+
M
N
P
Q
R
S
T
U
10
Serial No.
1~9
LG Model Development Serial No.
* ARTCOOL COLOR
R
W
B
Mirror
White
Blue
D
M
C
Wood
Metal
Cherry
4 Room Air Conditioner
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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.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
➔ Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
➔ Installation
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.
Service Manual 5
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Safety Precautions
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.
Be cautious when unpacking and installing the
product.
For installation, always contact the dealer or
an Authorized service center
• 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.
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.
6 Room Air Conditioner
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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 • There is risk of fire or failure of product.
shock.
Wa
Service Manual 7
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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.
➔ Installation
Always check for gas (refrigerant) leakage after Install the drain hose to ensure that water is
installation or repair of product.
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.
90˚
8 Room Air Conditioner
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➔ Operation
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 • There is risk of personal injury.
plastic parts of the product.
x
Wa
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.
Service Manual 9
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Dimensions
Dimensions
Symbols Used in this Manual
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that could cause harm to the
air conditioner.
NOTICE
This symbol indicates special notes.
Indoor Unit
H
D
W
Installation plate
MODEL
9k, 12k Btu Series
DIM
W
Unit
mm
1030
290
H
D
mm
mm
153
10 Room Air Conditioner
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Dimensions
Outdoor Unit
L2
W
L3
Gas side
(3-way valve)
Liquid side
(2-way valve)
MODEL
unit
9k, 12k Btu Series
DIM
W
mm
mm
mm
mm
mm
mm
mm
mm
770
540
245
287
64
H
D
L1
L2
L3
L4
L5
518
10
100
Service Manual 11
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Product Specifications
Product Specifications
Table-1
Model Name
AS-W096U_0
AS-W126U_0
AS-W096U_1
AS-W126U_1
Item
Unit
W
645
554
820
706
645
554
820
706
MIN
kcal/h.(W)
Btu/h.
W
2,200
2,637
2,268
9,000
3,246
2,792
11,080
527
2,800
3,516
3,024
12,000
3,868
3,326
13,200
1,289
1,109
4,400
3,956
3,402
13,500
4,351
3,742
14,850
1,098
1,410
5.0
2,200
2,637
2,268
9,000
3,246
2,792
11,080
527
2,800
3,516
3,024
12,000
3,868
3,326
13,200
1,289
1,109
4,400
3,956
3,402
13,500
4,351
3,742
14,850
1,090
1,410
5.0
Cooling Capacity Type
kcal/h.(W)
Btu/h.
W
Max
kcal/h.(W)
Btu/h.
W
MIN
Heating Capacity Type
Max
kcal/h.(W)
Btu/h.
W
454
454
1,800
3,164
2,722
10,800
4,087
3,515
13,950
750
1,800
3,164
2,722
10,800
4,087
3,515
13,950
750
kcal/h.(W)
Btu/h.
W
kcal/h.(W)
Btu/h.
W
Power Input
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
W
875
3.9
875
3.5
Running Current
Starting Current
A
A
4.5
3.9
4.5
3.0
12.00
3.11
12.34
3.52
6.2
5.0
6.2
2.8
10.93
2.41
9.57
3.20
2.81
4.0
3.5
4.0
3.0
12.00
3.11
12.34
3.52
6.2
5.0
6.2
2.8
10.93
2.41
9.57
3.20
2.81
A
A
kcal/hW
Btu/h.W
kcal/hW
Btu/h.W
W/W
EER
COP
Heating
Cooling
Heating
W/W
3.62
3.62
Power Supply
Power Factor
Air Circulation
Ø,V,Hz
%
1,220-240,50
97
9.0(318)
26(918)
1.5(3.2)
34
1,220-240,50
97
9.5(335)
26(918)
1.5(3.2)
35
1,220-240,50
97
9.0(318)
26(918)
1.5(3.2)
34
1,220-240,50
97
9.5(335)
26(918)
1.5(3.2)
35
Indoor,Max
m3/min(CFM)
m3/min(CFM)
l/h.(pts/h.)
dB(A)±3
dB(A)±3
dB(A)±3
dB(A)±3
Outdoor,Max
Moisture Removal
Noise Level
(Sound
Indoor,High
Med.
32
28
48
33
28
48
32
28
48
33
28
48
Pressure,1m)
Low
Outdoor,Max
Refrigerant(R410A)Charge
Power Cord
770(27.1)
16:3*1.0
16:4*1.0
6.35(1/4)
9.52(3/8)
7.5(295)
820(28.9)
16:3*1.5
16:4*1.5
6.35(1/4)
12.7(1/2)
7.5(295)
720(25.3)
16:3*1.5
16:4*1.0
6.35(1/4)
9.52(3/8)
7.5(295)
810(28.5)
16:3*1.5
16:4*1.5
6.35(1/4)
12.7(1/2)
7.5(295)
AWG#:P*mm2
AWG#:P*mm2
mm(in)
mm(in)
m(in)
Connecting Cable
Connecting Tube Liquid Side
(Ø. Socket Flare) Gas Side
Length,std
Drain Hose
(O.D , I.D)
Indoor
mm(in)
mm
21.5,16.0(0.85,0.63) 21.5,16.0(0.85,0.63) 21.5,16.0(0.85,0.63) 21.5,16.0(0.85,0.63)
1030*290*153
40.6*11.4*6.1
770*540*245
30.3*21.3*9.6
9.5(20.9)
1030*290*153
40.6*11.4*6.1
770*540*245
30.3*21.3*9.6
9.5(20.9)
1030*290*153
40.6*11.4*6.1
770*540*245
30.3*21.3*9.6
9.5(20.9)
1030*290*153
40.6*11.4*6.1
770*540*245
30.3*21.3*9.6
9.5(20.9)
Dimension
(W*H*D)
inch
Outdoor
mm
inch
Net Weight
Indoor
kg(lbs)
kg(lbs)
Outdoor
37(81.4)
38(83.8)
37(81.4)
38(83.8)
12 Room Air Conditioner
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Installation
Installation
Select the best Location
Indoor unit
1. Do not have any heat or steam near the unit.
2. Select a place where there are no obstacles in front
of the unit.
More than
5cm
More than 10cm
3. Make sure that condensation drainage can be conve-
niently routed away.
4. Do not install near a doorway.
More than
5cm
5. Ensure that the interval between a wall and the left
(or right) of the unit is more than 50cm. The unit
should be installed as high as possible on the wall,
allowing a minimum of 10cm from ceiling.
More than 2.3m
6. Use a stud finder to locate studs to prevent unneces-
sary damage to the wall.
CAUTION: Install the indoor unit on the wall where the height from the
floor is more than 2 meters.
Outdoor unit
1. If an awning is built over the unit to prevent direct
sunlight or rain exposure, make sure that heat radia-
tion from the condenser is not restricted.
2. 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.
More than 60cm
3. Do not place animals and plants in the path of the
warm air.
More than 10cm
More than 70cm
More than 10cm
4. Take the weight of the air conditioner into account
and select a place where noise and vibration are min-
imum.
More
than 60cm
5. Select a place where the warm air and noise from the
air conditioner do not disturb neighbors.
Service Manual 13
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Installation
Piping Length and Elevation
Pipe Size
Capacity
(Btu/h)
Standard
Length (m)
Additional
Refrigerant (g/m)
Max.
Max.
Elevation B (m) Length A (m)
GAS
3/8"
1/2"
LIQUID
9k
1/4"
1/4"
4 or 5
4 or 5
7
7
15
15
20
20
12k
Indoor unit
Outdoor unit
Outdoor unit
A
A
A
Oil trap
B
Indoor unit
Outdoor unit
Indoor unit
B
B
If piping length is more than 5m
CAUTION: Capacity is based on standard length and maximum allowance length is
on the basis of reliability.
Oil trap should be installed every 5~7 meters.
Fixing Installation Plate
The wall you select should be strong and solid
Installation Plate
enough to prevent vibration
1. Mount the installation plate on the wall with
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.
Type "A" screw
2. Measure the wall and mark the centerline. It is also
important to use caution concerning the location of
(SU)
the installation plate-routing of the wiring to power
outlets is through the walls typically. Drilling the
C
hole through the wall for piping connections must
Installation plate
be done safely.
A
Ø70mm
Ø70mm
Left rear piping
Right rear piping
Distance (mm)
CHASSIS
(Grade)
A
B
C
D
SU
(9k~12k)
92
44
67
44
14 Room Air Conditioner
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Installation
Drill a Hole in the Wall
• 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.
WALL
Indoor
Outdoor
Flaring Work
Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure.
Cut the pipes and the cable.
1. Use the piping kit accessory or the pipes purchased
Copper
pipe
locally.
Slanted Uneven Rough
90°
2. Measure the distance between the indoor and the out-
door unit.
3. Cut the pipes a little longer than measured distance.
4. Cut the cable 1.5m longer than the pipe length.
Burrs removal
Pipe
1. Completely remove all burrs from the cut cross section
of pipe/tube.
Reamer
2. Put the end of the copper tube/pipe in a downward
direction as you remove burrs in order to avoid drop-
ping burrs into the tubing.
Point down
Putting nut on
Flare nut
• Remove flare nuts attached to indoor and outdoor unit,
then put them on pipe/tube having completed burr
removal.
Copper tube
(not possible to put them on after flaring work)
Flaring work
1. Firmly hold copper pipe in a die in the dimension shown
in the table below.
2. Carry out flaring work with the flaring tool.
Handle
Yoke
Cone
Bar
Bar
Outside diameter
A
mm
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø19.05
inch
1/4
3/8
1/2
5/8
3/4
mm
0~0.5
0~0.5
0~0.5
0~1.0
1.0~1.3
Copper pipe
Clamp handle
Red arrow mark
Service Manual 15
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Installation
Check
Smooth all round
1. Compare the flared work with the figure by.
Inside is shiny without scratches
2. If a flared section is defective, cut it off and do flaring
work again.
= Improper flaring =
Inclined Surface Cracked Uneven
damaged
thickness
Even length
all round
Connecting the Piping
Indoor
1. Prepare the indoor unit's piping and drain hose for installation through the wall.
2. Remove the plastic tubing retainer(see the illustration
by) and pull the tubing and drain hose away from
chassis.
3. Replace the plastic tubing holder in the original posi-
tion.(Optional)
For right rear piping
1. Route the indoor tubing and the drain hose in the
direction of rear right.
2. Insert the connecting cable into the indoor unit from the
outdoor unit through the piping hole.
Drain hose
• Do not connect the cable to the indoor unit.
• Make a small loop with the cable for easy connec-
tion later.
3. 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 uper side
can cause drain pan to overflow inside the unit.
CAUTION: 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 fur-
niture or floors.
Tape
Connecting
pipe
*Foamed polyethylene or equivalent is recom-
mended.
Drain hose
Connecting cable
16 Room Air Conditioner
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Installation
4. Indoor unit installation
Hook the indoor unit onto the upper portion of the
installation 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 installation plate by moving it left and
right.
Connecting
cable
Drain hose
Press the lower left and right sides of the unit against
the installation plate until the hooks engage into their
slots(clicking sound).
Connecting the piping to the indoor unit and drain
hose to drain pipe.
1. Align the center of the pipes and sufficiently tighten
the flare nut by hand.
Indoor unit tubing
Flare nut Pipes
2. Tighten the flare nut with a wrench.
Open-end wrench (fixed)
Outside diameter
Torque
.
mm
inch
1/4
3/8
1/2
kg m
Flare nut
Ø6.35
Ø9.52
Ø12.7
1.8
4.2
5.5
Wrench
Connection pipe
Indoor unit tubing
3. When extending the drain hose at the indoor unit,
install the drain pipe.
Drain pipe
Indoor unit drain hose
Vinyl tape(narrow)
Adhesive
Wrap the insulation material around the connecting
portion.
Plastic bands
Insulation material
1. Overlap the connection pipe insulation material and
the indoor unit pipe insulation material. Bind them
together with vinyl tape so that there may be no gap.
2. Wrap the area which accommodates the rear piping
housing section with vinyl tape.
Indoor unit pipe
Wrap with vinyl tape
Connection pipe
Vinyl tape (wide)
Connecting cable
Pipe
Vinyl tape(narrow)
3. Bundle the piping and drain hose together by wrap-
ping them with vinyl tape for enough to cover where
they fit into the rear piping housing section.
Wrap with vinyl tape
Pipe
Vinyl tape(wide)
Drain hose
Service Manual 17
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Installation
For left rear piping
1. Route the indoor tubing and the drain hose to the
required piping hole position.
1
2
Connecting
cable
2. Insert the piping, drain hose, and the connecting
cable into the piping hole.
3. 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 connec-
tion later.
Drain pipe
4. Tape the drain hose and the connecting cables.
5. Indoor unit installation
• Hang the indoor unit from the hooks at the top of the
installation plate.
• Insert the spacer etc. between the indoor unit and
the installation plate and separate the bottom of the
indoor unit from the wall.
Indoor unit
Spacer
Installation plate
8cm
Connecting the piping to the indoor unit and the
drain hose to drain pipe.
1. Align the center of the pipes and sufficiently tighten
the flare nut by hand.
Indoor unit tubing
Flare nut Pipes
2. Tighten the flare nut with a wrench.
Outside diameter
Torque
.
mm
inch
1/4
3/8
1/2
kg m
Open-end wrench (fixed)
Ø6.35
Ø9.52
Ø12.7
1.8
4.2
5.5
Flare nut
Wrench
Connection pipe
Indoor unit tubing
3. When extending the drain hose at the indoor unit,
install the drain pipe.
Drain hose
Indoor unit drain hose
Vinyl tape (narrow)
Adhesive
18 Room Air Conditioner
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Installation
Wrap the insulation material around the connecting
portion.
Plastic bands
Insulation material
1. Overlap the connection pipe heat insulation and the
indoor unit pipe heat insulation material. Bind them
together with vinyl tape so that there may be no gap.
2. Wrap the area which accommodates the rear piping
housing section with vinyl tape.
Indoor
unit piping
Connection
pipe
Vinyl tape
(wide)
Wrap with vinyl tape
Pipe
Vinyl tape(narrow)
Connecting cable
Drain hose
3. Bundle the piping and drain hose together by wrap-
ping them with cloth tape over the range within which
they fit into the rear piping housing section.
Pipe
Vinyl tape(narrow)
Wrap with
vinyl tape(wide)
Reroute the pipings and the drain hose across the
back of the chassis.
Piping for
passage through
piping hole
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.
Indoor unit installation
Tubing holder
1. Remove the spacer.
2. Ensure that the hooks are properly seated on the
installation plate by moving it left and right.
3. Press the lower left and right sides of the unit against
the installation plate until the hooks engage into their
slots(clicking sound).
Connecting
cable
Drain hose
Service Manual 19
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Installation
CAUTION: Installation Information
For left piping. Follow the instruction below.
Good case
• Press on the upper side of clamp and unfold the tubing to downward slowly.
Bad case
• Following bending type from right to left may cause damage to the tubing.
20 Room Air Conditioner
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Installation
Outdoor
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.
Outdoor unit
Liquid side piping
(Smaller diameter)
• When tightening the flare nut with torque wrench,
ensure the direction for tightening follows the arrow on
the wrench.
Gas side
piping
(Bigger
diameter)
Outside diameter
Torque
mm
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø19.05
inch
1/4
3/8
1/2
5/8
3/4
kg.m
1.8
4.2
5.5
6.6
6.6
Torque wrench
Service Manual 21
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Installation
Connecting the Cables
Indoor
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.)
CAUTION:
• 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.
CAUTION: If a power plug is not
Main power source
used, provide a circuit breaker
between power source and the unit
as shown by.
Air
Circuit Breaker
Use a circuit breake
or time delay fuse.
Conditioner
CAUTION: The power cord connected to the "A" unit should be selected according to
the following specifications(Type "B" approved by HAR or SAA).
(mm2)
Grade
NORMAL CROSS
-SECTIONAL AREA
9k
1.0
12k
1.5
Unit(A)
Indoor
H05VV-F
Indoor
H05VV-F
Cable Type(B)
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).
(mm2)
(mm2)
NORMAL
CROSS
-SECTIONAL
AREA
NORMAL
CROSS
-SECTIONAL
AREA
Grade
Grade
9k
12k
9k
12k
1.0
1.5
1.5
1.5
Cable Type(B)
H07RN-F
H07RN-F
Cable Type(B)
H07RN-F
H07RN-F
(AS-W096/126U_0 Series)
(AS-W096/126U_1 Series)
22 Room Air Conditioner
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Installation
Outdoor
1. Remove the control cover from the unit by loosening
the screw.
Outdoor Unit
Connect the wires to the terminals on the control
board individually.
Terminal block
2. Secure the cable onto the control board with the cord
clamp.
Over 5mm
3. Refix the control cover to the original position with the
screw.
Connecting cable
Connecting cable
4. Use a recognized circuit breaker 20A(12k) between
the power source and the unit.
A disconnecting device to adequately disconnect all
supply lines must be fitted.
Cover control
Grade
Circuit
Breaker
(A)
9k~12k
15
CAUTION: According to 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.
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 function
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.
Service Manual 23
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Installation
Checking the Drainage
To check the drainage.
1. Pour a glass of water on the evaporator.
Connecting area
drain hose
2. Ensure the water flows through the drain hose of the
indoor unit without any leakage and goes out the
drain exit.
Leakage
checking
Drain pan
Drain
hose
Leakage
checking
Drain piping
1. The drain hose should point downward for easy drain
flow.
Downward slope
2. Do not make drain piping like the following.
Accumulated
drain water
Do not raise
Less than
50mm gap
Tip of drain hose
dipped in water
Air
Water
leakage
Water
leakage
Water
leakage
Waving
Ditch
24 Room Air Conditioner
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Installation
Forming the Piping
Form the piping by wrapping the connect-
ing portion of the indoor unit with insula-
tion material and secure it with two kinds
of vinyl tapes.
Seal small openings
around pipings with a
gum type sealer.
Taping
Drain hose
• If you want to connect an additional drain hose, the
end of the drain outlet should be routed above the
ground. Secure the drain hose appropriately.
Pipings
Connecting cable
In cases where the outdoor unit is
installed below the indoor unit perform the
following.
1. Tape the piping, drain hose and connecting cable
from down to up.
2. Secure the tapped piping along the exterior wall
using saddle or equivalent.
Trap is required to prevent water
from entering into electrical parts.
In cases where the Outdoor unit is
installed above the Indoor unit perform the
following.
Seal a small opening
around the pipings
with gum type sealer.
1. Tape the piping and connecting cable from down to
up.
Trap
2. Secure the taped piping along the exterior wall. Form
a trap to prevent water entering the room.
3. Fix the piping onto the wall by saddle or equivalent.
Trap
Service Manual 25
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Installation
Air Purging
Air purging
The air and moisture remaining in the refrigerant system have undesirable effects as indicated below.
1. Pressure in the system rises.
2. Operating current rises.
3. Cooling(or heating) efficiency drops.
4. Moisture in the refrigerant circuit may freeze and block capillary tubing.
5. Water may lead to corrosion of parts in the refrigeration system.
Therefore, after evacuating the system, take a leak test for the piping and tubing between the indoor and outdoor
unit.
Air purging with vacuum pump
1. Preparation
• Check that each tube(both liquid and gas side tubes) between the indoor and outdoor units have been properly connected
and all wiring for the test run has been completed. Remove the service valve caps from both the gas and the liquid side on
the outdoor unit. Note that both the liquid and the gas side service valves on the outdoor unit are kept closed at this stage.
2. Leak test
• Connect the manifold valve(with pressure gauges) and dry nitrogen gas cylinder to this service port with charge hoses.
CAUTION: Be sure to use a manifold valve for air purging. If it is not available, use a stop
valve for this purpose. The "Hi" knob of the manifold valve must always be kept close.
• Pressurize the system to no more than 150 P.S.I.G. with dry nitrogen gas and close the cylinder valve when the
gauge reading reached 150 P.S.I.G. Next, test for leaks with liquid soap.
CAUTION: To avoid nitrogen entering the refrigerant system in a liquid state, the top of the
cylinder must be higher than its bottom when you pressurize the system. Usually, the cylinder is
used in a vertical standing position.
1. Do a leak test of all joints of the tubing(both indoor and outdoor) and both gas and liquid side service valves.
Bubbles indicate a leak. Be sure to wipe off the soap with a clean cloth.
2. After the system is found to be free of leaks,
relieve the nitrogen pressure by loosening the
Manifold valve
Pressure
charge hose connector at the nitrogen cylinder.
When the system pressure is reduced to normal,
disconnect the hose from the cylinder.
Indoor unit
gauge
Lo
Hi
Charge hose
Outdoor unit
Nitrogen gas
cylinder(in vertical
standing position)
26 Room Air Conditioner
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Installation
Soap water method
1. Remove the caps from the 2-way and 3-way valves.
2. Remove the service-port cap from the 3-way valve.
3. To open the 2-way valve turn the valve stem counterclock-
wise approximately 90°, wait for about 2~3 sec, and close it.
4. Apply a soap water or a liquid neutral detergent on the
indoor unit connection or outdoor unit connections by a soft
brush to check for leakage of the connecting points of the
piping.
Liquid side
Gas side
2-way valve
(Open)
3-way valve
(Close)
5. If bubbles come out, the pipes have leakage
Evacuation
Cap
1. Connect the charge hose end described in the preceding
steps to the vacuum pump to evacuate the tubing and
indoor unit.
Hexagonal wrench
Confirm the "Lo" knob of the manifold valve is open.
Then, run the vacuum pump.
The operation time for evacuation varies with tubing
length and capacity of the pump. The following table
shows the time required for evacuation.
Indoor unit
Required time for evacuation when 30 gal/h vacuum
pump is used
If tubing length is longer
than 10m (33 ft)
If tubing length is less
than 10m (33 ft)
10 min. or more
15 min. or more
Outdoor unit
2. When the desired vacuum is reached, close the "Lo"
knob of the manifold valve and stop the vacuum pump.
Finishing the job
1. With a service valve wrench, turn the valve stem of liquid
side valve counter-clockwise to fully open the valve.
2. Turn the valve stem of gas side valve counter-clockwise
to fully open the valve.
3. Loosen the charge hose connected to the gas side ser-
vice port slightly to release the pressure, then remove
the hose.
Manifold valve
Pressure
gauge
Lo
Hi
Open
Close
4. Replace the flare nut and its bonnet on the gas side ser-
vice port and fasten the flare nut securely with an
adjustable wrench. This process is very important to pre-
vent leakage from the system.
5. Replace the valve caps at both gas and liquid side ser-
vice valves and fasten them tight.
This completes air purging with a vacuum pump.
The air conditioner is now ready to test run.
Vacuum pump
Service Manual 27
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Installation
Test Running
1. Check that all tubing and wiring are properly connected.
2. Check that the gas and liquid side service valves are fully open.
Prepare remote controller
1. Remove the battery cover by pulling it according to
the arrow direction.
2. Insert new batteries making sure that the (+) and (–)
of battery are installed correctly.
3. Reattach the cover by pushing it back into position.
NOTICE
• Use 2 AAA(1.5volt) batteries. Do not use rechargeable
batteries.
• Remove the batteries from the remote controller if the
system is not used for a long time.
Settlement of outdoor unit
1. Anchor the outdoor unit with a bolt and nut(ø10mm)
Bolt
tightly and horizontally on a concrete or rigid mount.
2. When installing on the wall, roof or rooftop, anchor
the mounting base securely with a nail or wire
assuming the influence of wind and earthquake.
3. If the vibration of the unit is transmitted to the hose,
secure the unit with an anti-vibration rubber.
Tubing connection
Evaluation of the performance
Operate the unit for 15~20 minutes, then check the sys-
tem refrigerant charge:
Intake temperature
1. Measure the pressure of the gas side service valve.
2. Measure the temperature of the intake and discharge
Discharge air
of air.
3. Ensure the difference between the intake tempera-
ture and the discharge is more than 8°C
4. For reference; the gas side pressure of optimum con-
dition is as below.(Cooling)
Discharge
temperature
The air conditioner is now ready for use.
Outside ambient
TEMP.
The pressure of the gas side
service valve.
4~5kg/cm2G(56.8~71.0 P.S.I.G.)
Refrigerant
R-22
35°C (95°F)
R-410A
35°C (95°F) 8.5~9.5kg/cm2G(120~135 P.S.I.G.)
28 Room Air Conditioner
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Installation
NOTICE
If the actual pressure is higher than shown, the system is most likely over-charged, and charge should be
removed. If the actual pressure are lower than shown, the system is most likely undercharged, and
charge should be added.
PUMP DOWN
This is performed when the unit is relocated or the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant into the outdoor unit without the loss of refrigerant.
CAUTION: Be sure to perform Pump Down procedure in the cooling mode.
Pump Down Procedure
1. Connect a low-pressure gauge manifold hose to the charge port on the gas side service valve.
2. Open the gas side service valve halfway and purge the air in the manifold hose using the refrigerant.
3. Close the liquid side service valve(all the way).
4. Turn on the unit's operating switch and start the cooling operation.
5. When the low-pressure gauge reading becomes 1 to 0.5kg/cm2 G(14.2 to 7.1 P.S.I.G.), fully close the gas side
valve and then quickly turn off the unit. Now Pump Down procedure is completed, and all refrigerant is collected
into the outdoor unit.
Service Manual 29
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Functions
Functions
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
• Room temperature sensor. (Thermistor)
• Pipe temperature sensor. (Thermistor)
Room temperature control
• Maintain the room temperature in accordance with the Setting Temp.
Starting the Current Control
• Indoor fan is delayed for 5 sec at the starting.
Time Delay Safety Control
• Restarting is for approx. 2 minutes.
Auto Changeover
Indoor Fan Speed Control
Energy-Saving control(Optional)
• Super High, High, Med, Low
Operation indication Lamps (LED)
Horizontal airflow Direction Control(Optional)
AUTO CLEAN(Optional)
PLASMA
--- Lights up in operation
--- Lights up in Sleep Mode
--- Lights up in Timer Mode
--- Lights up in Preheat Mode (for Heating Model)
--- Lights up in Plasma Air Clean Mode
PLASMA
• The function will be operated while in any
operation mode with selecting the function.
• The function is to be stopped while it is
operating with selecting the function.
Soft Dry Operation Mode
• Intermittent Operation of fan at low speed or off.
Sleep Mode Auto Control
Defrost(Deice) control (Heating)
• The fan is switched to low(Cooling), low(Heating) speed.
• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.
• Both the indoor and outdoor fan stops
during defrosting.
Natural Air Control by CHAOS Logic
Hot-start Control (Heating)
• The fan is switched to intermittent or irregular operation
•
The fan speed is automatically switched from high to low speed.
• The indoor fan stops until the
evaporator pipe temperature will be
reached at 34°C.
Airflow Direction Control
• The louver can be set at the desired position or swing
Heater (Optional)
up and down automatically.
30 Room Air Conditioner
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Functions
Outdoor Unit
Power relay control
•
If power is on, it will operate to chage capacitor on controller and power relay will operate after about 2~5sec.
Stand by control at low temp.
• If outdoor temp. is below 0°C, preheater is operating for 1~5min.
• At the initial, It will be operated compressor after 1min. for preheating.
Active power filter control(PSC)
• The active power filter is designed to correct power factor(cos θ) and to regulate DC link voltage.
• It will be operated PFC circuit when the compressor freq. is over 30Hz and wattage is over 450 watt.
Comp. Freq. control
• The final operating freq. of comp. is set the lowest freq. that limited outdoor temp., discharge pipe temp.,
heat-sink temp., target freq., owing to CT.
Overheatng. Protection(Power module)
• When the temp. of power module increases to 85°C, controller decreases Freq. of Comp.
Freq. speed control(up/down speed)
• It will be changed the drive freq. of comp. according to temp. of indoor and outdoor.
V/F control
• It will be changed the drive voltage of comp. according to operating frequency.
Total current control (over current protection)
DC peak current control
4 way valve control
• It is only operated in the heating operation mode except defrosting operation.
Outdoor fan motor control
• High speed
- Although fan motor speed is middle, it will change high speed in case of below AC193V, over 45°C of
outdoor temp., and over fc, fh of comp. Freq.
• Middle speed
- Nomal mode
• Low speed
- Although fan motor speed is middle, it will change Low speed in case of over AC 270V, over 21°C
(Heating Mode) of outdoor temp. below 24°C (Cooling Mode) of outdoor temp.
Discharge pipe temp. control
Low ambient
Service Manual 31
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Functions
Remote Control
Operation ON/OFF
Operation Mode Selection
Cooling Operation Mode.(
)
Auto Operation Mode.(
)
(Cooling
model only)
(Heating
model only)
Healthy Dehumidification Operation Mode.
(
)
Heating Operation Mode.(
)
Fan Speed Selection
(Low)
(Med)
(High)
(CHAOS)
Room, Temperature Display
: (High:39°C
Low:11°C)
Temperature Setting
LOW
HIGH
TEMPERATURE
Down to 18°C
Up to 30°C
Down to 16°C
Up to 30°C
Cooling
Heating
JET COOL
PLASMA(Optional)
PLASMA
Setting the Time or Timer
Timer Selection
ON
OFF
: OFF, ON, OFF
ON
Timer Setting
SET
Timer Cancel
CANCEL
: Cancel Sleep Mode, Timer ON or Timer OFF
Sleep Operation
: 1, 2, 3, 4, 5, 6, 7, Off Timer
Airflow Direction Control
Power Save Cooling Button
Horizontal Airflow Direction Control Button(Optional)
Reset
(Optional)
Auto Clean
AUTO CLEAN
32 Room Air Conditioner
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Operation
Operation
LED display of indoor unit
➔ LG Brand/OEM Brand
• On while in appliance operation, off while in appliance pause.
• Blinking(3sec off/0.5sec on) according to Error Code as long as the system malfunctions.
Operation Indicator
Sleep Timer Indicator
PLASMA Indicator
Timer Indicator
• On while in sleep timer mode, off when sleep timer cancel or appliance operation pause.
• On while in plasma mode, off when plasma mode cancel.
• On while in timer mode(on/off), off when timer mode is completed or canceled.
• Off except when hot start during heating mode operation or while in defrost control.
Preheat Indicator
Setting Temp.
• Cooling/heating/dehumidification mode : setting temperature from remote control
• Fuzzy operation mode : fuzzy key data(5sec on) ➔ AI
PLASMA
Cooling
A.I operation mode
Energy save
in cooling
mode
Operation
indicator
Jet Cleaning
(Cool, Heat) opeation
Too cold
Test
operation
heating
dehumidifi-
cation
Standard
Too hot
Hot
Comfortable
Cold
Shape of
display
Setting
temp.
Service Manual 33
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Operation
Protection of the evaporator pipe from frosting
• If the indoor pipe temperaure is below 0°C in 7 min. after the compressor operates without pause while in
cooling cycle operation mode,
➔➔compressor, outdoor fan are turned off.
• When indoor pipe temp. is 7°C or higher after 2 min pause of compressor
➔➔compressor, outdoor fan is turned on according to the condition of the room temperature.
Indoor pipe
temp.
Comp. free
Comp. off
6˚C
3˚C
0˚C
7˚C
Comp. Step 4
Comp. Step 2
Protection of the indoor fan from droplet formation (Enclosure sweat and condensed disposal test)
• Control condition : The system operates standard operation without this condition as follows.
Setting temperature <25°C
Indoor fan speed ≤ low speed
Outdoor temperature < 30°C
• Control method
In operation for 5~20 minutes in
,
,
conditions, return to the previous COMP STEP after operation for
5~40 minutes at the COMP STEP 3.
34 Room Air Conditioner
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Operation
Cooling mode operation
• Operating frequency of compressor depend on the difference of the temperature.
(= intake air Temp.- Compressor off Temp.
• Compressor off temp.= setting temp.
-0.5°C
on temp. = setting temp. +0.5°C
• If compressor operates at some operating frequency, the operating frequency of compressor cannot be
changed within 30 seconds.
• Condition of compressor turned off
- When intake air temperature stay at the temperature between setting temp.
1.0°C for 3 minutes continuously.
-0.5°C and setting temp.
-
- When intake air temperature reaches below the temperature of setting temp.
-1.0°C.
• Compressor 2 minutes delay
- The compressor can restart minimum 2 minutes later after compressor off.
[The operating freq. step of comp.]
Temp. differences
over 3.0°C
Comp. Operating frequency
Step 7
Step 6
Step 5
Step 4
Step 3
Step 2
Step 1
over 2.5°C
2.0~2.49°C
1.5~1.99°C
1.0~1.49°C
0.5~0.99°C
0.0~0.49°C
[The targeting operating freq. of comp. each model]
Comp. Operating frequency
Model
Step 1
15
Step 2
23
Step 3
31
Step 4 Step 5(Fc) Step 6
Step 7
65
AS-W096U_0 Series
AS-W126U_0 Series
AS-W096U_1 Series
AS-W126U_1 Series
38
46
48
57
47
58
53
69
58
61
58
77
15
20
20
25
35
35
35
40
45
66
62
86
Service Manual 35
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Operation
Healthy Dehumidification mode operation
• When the dehumidification operation is set by the remote controller the intake air temperature is detected and
the setting temp. is automatically set according to the intake air temperature.
Intake air Temp.
26°C ≤ intake air temp.
Setting Temp.
25°C
24°C ≤ intake air temp.< 26°C
18°C < intake air temp. < 24°C
intake air temp. ≤ 18°C
intake air temp. -1°C
intake air temp. -0.5°C
18°C
• When intake air temp reaches above the temp of setting +1.0°C, condition of compressor same as cooling
mode operation.
• When intake air temperature reaches bolow the temp of setting –1.0°C, compressor operate step1~step3 and
indoor fan speed repeatly operate low or stop.
36 Room Air Conditioner
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Operation
Heating mode operation
• Operating frequency of compressor depend on the difference of the temperature
(= compressor off temp. - intake air temp.)
• Compressor off temp. = setting temp.+3.0°C
on temp. = setting temp.
• If compressor operates at some operation frequency, the operating frequency of compressor cannot be
changed within 30 seconds.
• Condition of compressor turned off
- When intake air temperature reaches +3°C above the setting temperature.
• Condition of indoor fan turned off
- While in compressor on:indoor pipe temp. < 30°C
• While in defrost control, between the indoor and outdoor fans are turned off.
• Compressor 2minutes delay
- After compressor off, the compressor can restart minimum 2 minutes later.
[ The operating freq. step of comp]
Comp. Operating frequency
Temp. differences
over 3.0°C
Step 7
Step 6
Step 5
Step 4
Step 3
Step 2
Step 1
2.5~3.0°C
2.0~2.49°C
1.5~1.99°C
1.0~1.49°C
0.5~0.99°C
0.0~0.49°C
[The targeting operating freq. of comp. each model]
Comp. Operating frequency
Model
Step 1
15
Step 2
29
Step 3
39
Step 4 Step 5(Fc) Step 6
Step 7
73
AS-W096U_0 Series
AS-W126U_0 Series
AS-W096U_1 Series
AS-W126U_1 Series
49
52
58
62
59
68
67
82
66
71
75
86
25
20
20
31
35
35
40
48
48
73
87
89
Service Manual 37
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Operation
Fuzzy mode operation(Optional)s
• When any of operation mode is not selected like the moment of the power on or when the unit turned off, the
operation mode is selected.
• When determining the operation mode, the compressor, outdoor fan are off and only the indoor fan is operat-
ed for 15~20 seconds, then an operation mode is selected according to.
Basis of determining operating mode
Indoor temp.
over 24°C
21~24°C
Operating Mode
Cooling
Healthy Dehumidification
Heating
below 21°C
1. Fuzzy operation for cooling
• According to the setting temperature selected by Fuzzy rule, the operating frequency of compressor is deter-
mined like cooling mode operation.
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temperature at that time.
• When the Fuzzy key(=setting temp. key) is input after the initial setting temperature is selected, the Fuzzy
key value and intake air temperature at that time are compared to select the setting temperature automatical-
ly according to the fuzzy rule.
• While in Fuzzy operation, the air flow speed of the indoor fan is automatically operated by Fuzzy logic.
Intake air temp.
over 26°C
Setting temp.
25°C
Fan speed
at beginning
18~26°C
intake air temp. -0.5°C
18°C
below 18°C
18~30°C
Fuzzy airflow
Fuzzy rule
during opertion
below 18°C
over 30°C
18°C Fuzzy rule
30°C Fuzzy rule
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Operation
2. Fuzzy operation for Heating
• According to the setting temperature selected by Fuzzy rule, the operating frequency of compressor is deter-
mined like heating mode operation.
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temperature at that time.
• When the Fuzzy key(=setting temp. key) is input after the initial setting temperature is selected, the Fuzzy
key value and intake air temperature at that time are compared to select the setting temperature automatical-
ly according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically operated by Fuzzy logic.
Fan speed
Intake Air temp.
over 20°C
Setting temp.
intake air temp. +0.5°C
20°C
at beginning
below -20°C
16~30°C
Fuzzy airflow
Fuzzy rule
during opertion
below 16°C
over 30°C
16°C Fuzzy rule
30°C Fuzzy rule
3. Fuzzy operation for dehumidification
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temperature at that time.
• According to the setting temperature selected by Fuzzy rule, the operating frequency of compressor is deter-
mined like dehumidefication mode operation.
Fan speed
Intake Air temp.
over 26°C
Setting temp.
25°C
at beginning
18~26°C
intake air temp. -0.5°C
18°C
below 18°C
18~30°C
Fuzzy airflow
Fuzzy rule
during operation
below 18°C
over 30°C
18°C Fuzzy rule
30°C Fuzzy rule
Service Manual 39
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Operation
Jet cool mode operation
• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the
other mode operation(cooling, dehumidification, ventilation), the Jet Cool mode is operated.
• In the Jet Cool mode, the indoor fan is operated super-high speed for 30 min. at cooling mode operation.
• In the Jet Cool mode, the room temperature is controlled to the setting temperature, 18°C.
• When the sleep timer mode input while the Jet Cool mode operation, the Jet Cool mode has the priority.
• When the Jet Cool key is input, the upper/lower vane is reset to those of the initial cooling mode and then
operated in order that the air outflow could reach further.
Jet heat mode operation
• While in cooling mode or Fuzzy operation, the Jet Heat key cannot be input. When it is input while in the
Heating mode operation (dehumidification), the Jet Heat mode is operated.
• In the Jet Heat mode, the indoor fan is operated super-high speed for 60 min. at Heating mode operation.
• In the Jet Heat mode, the room temperature is controlled to the setting temperature, 30°C.
• When the sleep timer mode input while the Jet Heat mode operation, the Jet Heat mode has the priority.
• When the Jet Heat key is input, the upper/lower vane is reset to those of the initial Jet heating mode and
then operated in order that the air outflow could reach under flow.
Swing mode
1. Chaos swing mode
• By the Chaos swing key input, the upper/lower vane automatically operates with the Chaos swing or it is
fixed to the desired direction.
CLOSED
Chaos Swing On
Mode 9
Mode 8
Mode 7
Mode 6
Mode 5
Mode 4
Mode 3
Mode 2
Mode 1
OPEN
Chaos Swing
The first path
40 Room Air Conditioner
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Operation
Sleep timer operation
• When the sleep time is reached after [1,2,3,4,5,6,7hr] is input by the remote control during the operation, the
operation of the appliance stops.
• When the appliance is on pause, the sleep timer mode cannot be input.
1. Sleep timer operation for cooling cycle
• While in cooling mode operation, 30 min. later since the start of the sleep timer, the setting temperature
increase by 1°C. After another 30min. elapse, it increases by 1°C again.
Setting temp. (˚C)
1.0˚C up
1.0˚C up
Cooling ON temp.
(Setting temp. +0.5˚C)
Cooling OFF temp.
(Setting temp. -0.5˚C)
(
)
0.5
1
Sleep time hr
2. Sleep timer operation for heating cycle
• While in heating mode operation, 60 min. later since the start of the sleep timer, the setting temperature
decrease by 1°C. After another 60min. elapse, it decreases by 1°C again.
Setting temp. (°C)
Heating OFF temp.
(Setting temp. +3.0°C)
1.0°C down
1.0°C down
Heating ON temp.
(Setting temp)
(
)
1
2
Sleep time hr
Service Manual 41
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Operation
Auto restarting operation
• When the power is restarted after a sudden power failure while in appliance operation, the mode before the
power failure is kept on the memory and the appliance automatically operates in the mode on the memory.
• Operation mode that is kept on the memory
- State of operation ON/OFF
- Operation mode/setting temp./selected airflow speed
- Sleep timer mode/remaining time of sleep timer
- Chaos Swing
Forced operation
• To operate the appliance by force in case that the remote control is lost, the forced operation selection switch
is on the main unit of the appliance to operate the appliance in the standard conditions.
• The operation condition is set according to the outdoor temp. and intake air temperature as follows.
Setting speed of
Operating Mode
Setting temp.
Indoor temp.
indoor fan
Cooling
Healthy Dehumidification
Heating
22°C
23°C
24°C
over 24°C
21~24°C
High speed
below 21°C
➔➔The unit select before operating mode in 3 hours.
Trial Operation
• Press the Tact Switch for compulsory operation of the main body for 3 seconds in order to operate in the trial
operation mode.
- Operation mode: Cold
- Indoor pan: Strong wind
- COMP frequency: Step 5
- COMP compulsorily operates for about 18 minutes irrespective of indoor temperature.
42 Room Air Conditioner
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Operation
Protection from total current control
➔ CT1 control
• If the operating current reaches I1, the operating frequency of the compressor decrease.
• After decreasing the operating frequency by 1step, if operating current is below I1 for 60 seconds continuous-
ly, the operating frequency of compressor increase by 1step.
➔ CT2 control
• If the operating current of the appliance reaches I2, the compressor stop instantly and 2 minutes later the
compressor restart again.
• If CT2 occurs 5 times within 1hour, the appliance turn off and display ERROR CODE 7.
➔ I1:Current of operating frequency down
Control table
I2: Current of compressor cut off
I1
Outdoor temp ≥ 38°C
Outdoor temp < 38°C
I2
Model
Cooling
Heating
Cooling
Heating
1
2
3
4
AS-W096U_0 Series
AS-W126U_0 Series
AS-W096U_1 Series
AS-W126U_1 Series
6.5
6.5
5.5
6
8.5
7
7
9
8
12
10
9
7.5
7
6
7.5
8
7.5
6.5
10
cf. I1 is set the lowest level between intial value and in case dectection of dc paeak current.
Protection from DC Peak Current
➔ DC Peak Current Error by a fault signal of IPM
• If the operating current of IPM reaches 35A ±3A, the compressor stop instantly.
• If DC PEAK occurs 5 times within 1 hour, the appliance turns off and display ERROR CODE 6.
➔ DC Peak Current Error by the compressor lock
• If the DC LINK voltage below DC 140V occurs 5 times within 1 hour while the compressor is operating, the
appliance turns off and display ERROR CODE 6.
➔ DC Peak Current Error by the Outdoor Fan Lock
• If it’s 5 times within 1 hour in case of the temperature of outdoor pipe TH is over 65°C while the compressor
is operating, the appliance turns off and display ERROR CODE 6.
Service Manual 43
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Operation
Portection from overheating of power module
• If the temperature of the heat sink TH. reaches over Toff, the Compressor stop instantly.
• It will be limited the compressor operating frequency according to the heat sink TH.(refer to below FIG.)
• It will be blink 4 times, when the thermistor is open or short, also the temperature is over Toff.
∆T = (T off - T on)
Heat Sink Temp.
No.
MODEL
T on
T off
T1 = T on + ∆T
T2 = T on + 2 ∆T
*
T off °C
1
2
3
4
AS-W096U_0 Series
AS-W126U_0 Series
AS-W096U_1 Series
AS-W126U_1 Series
85
85
85
85
95
95
95
95
T2 °C
T1 °C
T on °C
COMP
Freq.
Free Fc-1 Fc-2
Fc-1
Fc-2
OFF
Free
Portection from overheating of compressor
• If the temperature of the discharge pipe of compressor reaches over 130°C or below -30°C the compressor
stop instantly.
• It will be limited the compressor operating frequency according to the compressor dome TH.(Refer to below
Fig.)
• Temperature range by COMP SPEC varies by 10°C.
∆T = (T off - T2)/2
D-Pipe Temp.
No.
MODEL
T on
T off
T1 = T2 + 2 ∆T
*
T3 = T2 + ∆T
1
2
3
4
AS-W096U_0 Series
AS-W126U_0 Series
AS-W096U_1 Series
AS-W126U_1 Series
102
88
110
100
105
105
95
95
COMP Freq.
Free
Fc-1 Fc-2 OFF
Fc-2 Fc-1 Free
Fh min
44 Room Air Conditioner
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Operation
Defrosting control
• While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing,
reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit.
• Defrosting control is available 50 minutes later since heating cycle started and the pipe temperature of out-
door unit reaches below -6°C.
<AS-W096/126U_0 Series>
Main Deice time
Minimum Time
of Heating
15s 6s
30s
10s
1 min
Setting
Freq.
Operating
Freq. of
Comp.
Setting Freq.
Step 5+ꢀ
Step 6
Fh
Fh
Fh
min
min
min
350(Option)
Starting step
ON
EEV
Open step
Setting
ON
4-Way
OFF
Setting
Speed
Setting
Speed
Outdoor
FAN
Hi Speed
Setting
Speed
Indoor
FAN
Hot
Start
Hot
Starting
OFF
ON
Pre-Heat
LED
OFF
OFF
Deice STEP
0
1
2
3
4
5
6
<AS-W096/126U_1 Series>
Minimum Time
of Heating
Main Deice time
15s
5s
30s
10s
1min
Setting
Freq.
Operating
Freq. of
Comp.
Setting Freq.
Step 5+
·
Step 6
Fh
min 20s
20s
off
off
350(Option)
Starting step
ON
Setting
ON
EEV
Open step
4-Way
OFF
Setting
Speed
Setting
Speed
Outdoor
FAN
Hi Speed
Setting
Speed
Indoor
FAN
Hot
Start
Hot
Starting
OFF
Pre-Heat
LED
ON
OFF
OFF
Deice STEP
0
1
2
3
4
5
6
Service Manual 45
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Operation
Auto Cleaning
• Function used to perform the Self Cleaning to prevent the Unit from Fungus and Bad Odors.
• Used after the Shut Down of Cooling Operation to Clean the Evaporator and keep it as fresh for the Next operation.
• During Self Cleaning the Outdoor Unit is Switched off.
• The function is easy to be operated as It is accessed through the Remote Controller.
1) Heat/pump Model
2) Cooling/only Model
ON
OFF
Fan Heating Fan
13 Min 60 Sec 120 Sec
ON
OFF
Cooling CYCLE
Cooling CYCLE
Fan
30 Min
OFF
Comp.
Comp.
ON
ON
OFF
Low
ON
OFF
Low
Indoor Fan
Setting Step
Low
Indoor Fan
Setting Step
Low
Auto Changeover(Optional)
Outdoor
temp.
• While in fuzzy mode operation the air condi-
tioner changes the operation mode automati-
cally to keep indoor temperature.
Outdoor temp.
Indoor temp.
• When room temperature vary over ±2°C with
respect to setting temperature, air condition-
er keeps the room temperature in ±2°C with
respect to setting temperature by auto
change mode.
+
+
2°C
1°C
30°C
20°C
10°C
+
0.5°C
Set Temp.
-
0.5°C
-
-
1°C
2°C
Auto
Change
Mode.
COOLING
HEATING
COOLING
Low Ambient
• If outdoor temperature drops below certain temperature,liquid back is prevented by reducing fan speed.
It can prevent frosting of evaporator and keep cooling operation
• No matter even if the outdoor temperature reaches -10°C.
• You can Cool your room at your desired temperature all your around.
25
Comp Freq.
Cond . temp.
Outdoor temp.:-10°C
20
15
Freq.
Outdoor fan
10
On
On
Outdoor pipe temp.
Outdoor fan On/Off control
5
0
0°C outdoor fan On/Off
°
control
Off
Off
0
50
100
150
Time(Min.)
200
Outdoor temp.
°…
- 0°C
-5
46 Room Air Conditioner
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Disassembly
Disassembly
Indoor Unit
Warning :
Disconnect the unit from power supply before making
any checks.
Be sure the power switch is set to “OFF”.
To remove the Grille from the Chassis.
• Hold up Inlet Grille Horizentally.
• To remove the Grille, pull the lower left and right
side of the grille toward you (slightly tilted) and lift it
straight upward.
• To seperate connecter assembly and than to
remove Inlet Grille assembly.
1. Before removing the control box, be sure to
take out the wire screwed at the other end.
Service Manual 47
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Disassembly
2. To remove the Control Box.
• Remove securing screws.
• Pull the control box out from the chassis
carefully.
3. To remove the Discharge Grille.
• Unhook the discharge grille and pull the dis-
charge grille out from the chassis carefully.
4. To remove the Evaporator.
• Remove 3 screws securing the evaporator(at the
left 2EA in the Eva Holder, at the right 1EA).
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Disassembly
• Unhook the tab on the right inside of the chassis
at the same time, slightly pull the evaporator
toward you until the tab is clear of the slot.
5. To remove the Motor Cover
• Remove 2 securing screw.
• Pull the motor cover out from the chassis
carefully.
Motor cover
6. To remove the Cross-Flow Fan
• Loosen the screw securing the cross-flow fan to
the fan motor (do not remove).
• Lift up the right side of the cross-flow fan and the
fan motor, separate the fan motor from the
cross-flow fan.
• Remove the left end of the cross-flow fan from
the self-aligning bearing.
Service Manual 49
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Schematic Diagram
Schematic Diagram
Electric Control Device
• Indoor(AS-W096U_0, AS-W126U_0 Series)
3 3
P 0 2 / S 1 B 6 T 0
P 5 1
P 5 2
P 5 3
P 5 4
P 6 0
P 6 1
P 6 2
3 4
3 5
3 6
3 7
P 0 1 / R 1 X 5 D / S B I 0
P 0 0 / T 1 X 4 D / S B O 0
M M O D
1 3
3 8
3 9
X O 1 2
X I 1 1
V s s
1 0
O S C 1
9
4 0
4 1
P 6 3
P 6 4
P 6 5
P 6 6
P 6 7
O S C 8 2
N - I O N
V d d
7
4 2
S S R
V r e f +
6
4 3
R Y - P W R
P A 7 / A N 7
5
4 4
R 0 5 N
R 0 4 N
P L A S M A
P A 6 4 / A N 6
P A 5 3 / A N 5
4 5
P 7 0
P 7 1
P 7 2
P 7 3
R 0 3 N
D A T A 0
2
P A 4 / A N 4
4 6
D A T A 1
P A 3 1 / A N 3
4 7
D A T A 2
4 8
D A T A 3
50 Room Air Conditioner
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Schematic Diagram
Outdoor(AS-W096_Series, AS-W126_Series)
Service Manual 51
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Schematic Diagram
Wiring Diagram
Indoor Unit
(AS-W096/126U_0,1 Series
WIRING DIAGRAM
POWER
MAIN PCB
ASM
SSR
OR
BK
THERMISTOR
MOTOR
ZNR01F
SH-CAPA.
BL
CN-IN
CN-OUT
STEP
MOTOR
BL
BR
STEP
MOTOR
FUSE
AC250V/T2A
4
3
RY-PWR
CN-COM
RD
BK
RD
H.V.B
A/CL
BK
TERMINAL
BLOCK
(
)
(
)
3
1 L 2 N
CN-MAIN
LIMIT S/W-1
LIMIT S/W-2
FORCED
OPERATON
S/W
CONNECTOR
PWB ASM
CN-STEP1
CN-STEP2
TO OUTDOOR UNIT
SUC
STEP
MOTOR-1
SUC
STEP
MOTOR-2
3854A20305E
52 Room Air Conditioner
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Schematic Diagram
Outdoor Unit
AS-W096U_0 Series
AS-W126U_0 Series
REVERSING
VALVE
HEAT SINK
TH.
OUTDOOR
TH.
PIPE TH.
CN-TH1
COMP TH.
OUTDOOR WIRING DIAGRAM
REACTOR
Motor
BK
BK
BK
OR YL
WCN-
CAP1
WCN-
CAP2
CN-
FAN1
CN-COIL1 CN-COIL2
CN-TH2
CN-D-PIPE
CN-
4WAY
4(BK)
1(BK)
WCN-NOISE
WCN-NOISE
TERMINAL
BLOCK
20A/AC 250V
FUSE
BR
BL
CN-U
CN-V
RD
BL
+
+
+
SPM2
COMP
GN/YL
YL
CN-W
RD
3(BK)
WCN-NOISE
WCN-NOISE
Outdoor PWB ASSY
2(BK)
3854A20310C
AS-W096/126U_1 Series
Service Manual 53
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Schematic Diagram
Components Location
INDOOR
MAIN P.W.B ASSEMBLY (DC PART)
• TOP VIEW
CN-LR
CN_OUT
C01N
J10
NF01N
FUSE1250V/T2A
BZ01E
R03K
SSR
POW ER-MODULE
C02L
J12
R05K
R02P
J07
CY2
CY1
R03H
R04H
C01E
W CN-NOISE
NTC
J04
J05
IC02K
IC01K
D01D
J11
C01D
L1
EEPROM
C03D
IC01D
C05D
IC02D
C06D
J01
C07D
• BOTTOM VIEW
CN_OUT
CN_IN
CN_COM
CN-L/R(BL)
RY-PW R
ZNR01N
J10
IC03M
C01N
IC02M
FUSE1250V/T2A
R03K
NF01N
MICOM
SSR
IC01M
BZ01E
C02N
C02L
R05K
J12
J09
J08
Q02E
R02P
CY2
CY1
J07
R03H
W CN-NOISE
NTC
R02H
R04H
POW ER-MODULE
IC02K
IC01K
BD01D
J04
J05
J14
C01E
Q01D
C01L
Q01E
R04D
Q03E
Q01K
R04E
R01A
EEPROM
D01D
C01D
J11
IC01G
L1
J06
J15
C03D
IC01D
C05D
C07D
IC02D
JP2
J01
54 Room Air Conditioner
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Schematic Diagram
DISPLAY ASSEMBLY(AS-W096/126U_0,1 Series)
TOP VIEW
CN-DISP
LED MODULE
RECEIVER
PW B:6870A90178A
PW B ASM:6871A20463
C01G
BOTTOM VIEW
LED MODULE
Data1
Data2
Data3
Data4
Data5
Scan1
Scan2
Scan3
Scan4
Scan5
Vcc
Vo
GND
Service Manual 55
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Schematic Diagram
OUTDOOR MAIN P.W.B ASSEMBLY
(AS-W096/126U_0 Series)
• TOP VIEW
• BOTTOM VIEW
(AS-W096/126U_1 Series)
• TOP VIEW
• BOTTOM VIEW
W
C N - N O I S E 1
R 0 2 J
R 0 3 J
S U R G E
C 0 5 S
J 3 2
J 3 1
J 3 0
J 2 9
J 2 8
C 0 4 S
R 0 4 S
R 0 5 S
R 0 1 S
C 0 6 S
C 1 4 Z
C 1 7 Z
C 0 7 S
C 0 9 S
R 1 2 Z
R 2 2 Z
R 2 1 Z
R 2 0 Z
R 0 3 Z
C 0 3 Z
C 0 2 Z
C 0 1 Z
R 0 2 Z
R 0 1 Z
C 1 3 Z
C 0 7 Z
C 0 9 Z
C 1 1 Z
C 1 5 Z
J 2 7
J 2 6
J 2 5
J 2 4
J 2 3
J 2 2
J 2 1
J 2 0
J 1 9
C 0 4 Z
C 0 5 Z
C 0 6 Z
R 2 3 Z
R 2 4 Z
R 2 5 Z
R 0 4 Z
R 0 5 Z
R 0 6 Z
J 1 8
J 1 7
4
3
F U S E
R 0 6 K
R 0 7 K
R 0 3 S
R 0 8 K
D 0 2 C
I C 0 1 C
D 0 1 K
R 2 1 P
R 1 9 P
C 0 1 P
R 0 5 K
D 0 1 C
Z D 0 3 K
R 0 2 C
R 0 1 C
D 0 1 N
R 2 0 P
R 0 6 P
R 1 2 P R 1 0 P R 1 5 P
R 1 3 P R 1 4 P R 0 8 P
C N - C O I L 2
B D 0 1 N
R 0 3 P
R 1 8 P
C N _ S / V A L V E 2
Y L - W
B L - V
R 1 1 P
R 0 9 P
C 0 5 P
R D - U
R 0 7 P
R 1 6 P
R 0 4 P
R 0 1 P
R 0 2 P
R 0 5 P
R 1 7 P
L E D 0 1 M
R 1 8 Z
R 1 7 Z
R 1 9 Z
C N _ S / V A L V E 1
J 0 4
J 0 3
J 0 2
J 0 1
I C 0 2 M
C N - F l a s h
W
r i t e r
R Y - 4 W A Y
R 0 2 Y
C 0 3 D
E E P R O M
C N - C O I L 1
D 0 1 Y
R 0 2 F
R 0 4 F
O S C 0 1 B
Z D 0 1 F
I C 0 1 A
C 0 1 Y
I C 0 1 D
J 1 2
J 1 1
J 1 0
J 0 9
J 1 3
J 1 6
J 1 4
J 1 5
R Y - H / P U M P
R 0 3 F
R 0 3 Y
R 0 5 F
C N - F L A S H
R 0 7 H
R 0 5 H
R 0 3 H
R 0 1 H
C 0 4 P
R 2 4 P
R 2 3 P
R 0 8 H
R 0 6 H
R 0 4 H
C 0 3 P
C 0 2 P
J 1 5
Q 0 4 F
Q 0 3 F
C 0 1 H
C N - F L A S H
Q 0 1 F
C 0 6 B
J 1 4
J 1 6
J 1 3
R 2 2 P
R 0 4 C
J 0 9
Q 0 2 F
R 0 3 Y
C 0 1 C
J 1 0
J 1 1
R 0 2 H
R 0 4 B
O S C 0 1 B
R 0 2 B
R 0 4 Y
I C 0 1 A
C 0 1 B
C 0 5 B
R 0 6 S
R 1 3 Z
C N - C O I L 1
C 1 0 S
C 1 8 Z
C 0 1 Y
J 1 2
R 0 3 B
R Y - H / / P U M P
R 0 3 A
R 0 2 A
C 0 2 Y
Z D 0 1 F
R 0 2 Y
R 0 1 B
C 0 4 B
C 0 3 B
R 0 3 N
C 0 2 N
C 0 2 B
D 0 1 Y
R 0 1 A
C 0 1 A
R 0 5 B
R Y - P U M P
R Y - 4 W A Y
C 0 3 D
C 0 1 F
R 0 1 F
C 0 1 X
C 0 1 L
R 0 1 L
R 0 4 X
R 0 1 X
C 0 9 B
R 0 2 L
R 0 6 B
J 0 1
C 0 7 B
R 0 5 X
J 0 2
J 0 3
J 0 4
R 0 2 X
R 0 2 K
C 0 2 K
R 0 4 K
C N - F l a s h W r i t e r
C N _ S / V V A L V E 1
C N _ S / V V A L V E 2
R 0 1 M
16
L E D 0 1 M
1
R 0 1 K
R 0 3 K
R 0 2 C
R 0 1 C
D 0 2 C
D 0 1 C
R 0 3 C
R 0 5 K
Z D 0 3 K
2 7
2 5
2 6
2 4
I C 0 1 C
2 3
2 2
2 1
R 0 7 K
D 0 1 K
C N - C O I L 2
R08K
R 0 6 K
F U S E
R 0 3 S
2 5
J 2 3
J 2 4
J 1 7
J 1 8
2 7
2 6
2 4
2 3
2 2
2 1
J 2 5
J 2 6
J 2 7
J 1 9
J 2 0
1 7
1 3
9
J 2 1
J 2 2
2 0
1 5
1 1
5
1
J 2 8
J 2 9
J 3 0
1 7
1 3
9
J 3 1
J 3 2
2 0
1 5
1 1
5
1
R 0 3 J
R 0 2 J
9
S U R G E
W C N - N O O I S E 1
56 Room Air Conditioner
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Troubleshooting Guide
Troubleshooting Guide
Refrigeration Cycle Diagram
(1) Model Capillary Tube
INDOOR UNIT
OUTDOOR UNIT
CHECK VALVE
LIQUID SIDE
3-WAY VALVE
HEAT
HEAT
EXCHANGE
(EVAPORATOR)
EXCHANGE
(CONDENSER)
GAS SIDE
REVERSING
VALVE
3-WAY VALVE
ACCUMU
LATOR
COOLING
HEATING
COMPRESSOR
(2) Model Adopted Electrion Expansion Valve
INDOOR UNIT
OUTDOOR UNIT
LIQUID SIDE
EER
3-WAY VALVE
HEAT
HEAT
EXCHANGE
(EVAPORATOR)
EXCHANGE
(CONDENSER)
GAS SIDE
REVERSING
VALVE
3-WAY VALVE
ACCUMU
LATOR
COOLING
HEATING
COMPRESSOR
Service Manual 57
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Troubleshooting Guide
Pipe Length and the Elevation
Pipe Size
Standard
Length
(m)
Max.
Elevation
B (m)
Max.
Length
A (m)
Additional
Refrigerant
(g/m)
Capacity
(Btu/h)
GAS
LIQUID
3/8"(Ø9.52)
1/2"(Ø12.7)
1/2"(Ø12.7)
5/8"(Ø15.88)
5/8"(Ø15.88)
5/8"(Ø15.88)
3/4"(Ø19.05)
1/4"(Ø6.35)
1/4"(Ø6.35)
1/4"(Ø6.35)
1/4"(Ø6.35)
3/8"(Ø9.52)
3/8"(Ø9.52)
3/8"(Ø9.52)
4 or 7.5
4 or 7.5
4 or 7.5
4 or 7.5
4 or 7.5
7.5
7
15
15
30
30
30
30
30
20
20
20
20
30
30
50
7k~14k
7
15
15
15
15
15
18k~28k
30k~38k
7.5
Outdoor unit
Outdoor unit
A
Oil trap
A
Indoor unit
Indoor unit
B
B
In case more than 5m
CAUTION:* Capicity is based on standard length and maximum allowance length
is the basis of reliability.
* Oil trap should be installed per 5~7 meters.
58 Room Air Conditioner
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Troubleshooting Guide
2-way, 3-way Valve
2-way Valve (Liquid Side)
3-way Valve (Gas Side)
Valve cap
Open position
Hexagonal wrench (4mm)
Flare nut
Flare nut
Closed position
Open position
Closed position
Pin
To
To
piping
piping
Service
port cap
Service
port
connection
connection
To outdoor unit
To outdoor unit
Works
Shaft position
Shaft position
Service port
Closed
(with valve cap)
Closed
(with valve cap)
Closed
(with cap)
Shipping
Air purging
Open
Closed
Open
1.
(Installation)
(counter-clockwise)
(clockwise)
(push-pin or with
vacumm pump)
Open
(with valve cap)
Open
(with valve cap)
Closed
(with cap)
Operation
Closed
(clockwise)
Open
Open
Pumping down
(Transfering)
(counter-clockwise) (connected manifold
gauge)
2.
3.
4.
Open
Open
Open
Open
(with charging
cylinder)
Evacuation
(Servicing)
Open
Open
(with charging
cylinder)
Gas charging
(Servicing)
Open
Pressure check
(Servicing)
(with charging cylinder)
Open
Open
Open
Open
5.
6.
Open
Gas releasing
(Servicing)
(with charging cylinder)
Service Manual 59
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Troubleshooting Guide
Air purging
Required tools : hexagonal wrench, adjustable wrench,
torque wrenches, wrench to hold the
joints, and gas leak detector.
The air in the indoor unit and in the piping must be
purged. If air remains in the refrigeration pipes, it will
affect the compressor, reduce to cooling capacity,
and could lead to a malfunction.
The additional gas for air purging has been charged
in the outdoor unit.
However, if the flare connections have not be done
correctly and there gas leaks, a gas cylinder and the
charge set will be needed.
Liquid side
Indoor unit
Open
Outdoor unit
2-way
valve
Gas side
Clsed
3-way
valve
Service port nut:
Be sure, using a torque wrench to tighten the service port nut (after using the service port), so that it prevents the
gas leakage from the refrigeration cycle.
CAUTION: Do not leak the gas in the air during Air purging.
• Procedure
(6) Set the 3-way valve to the back seat.
(1) Recheck the piping connections.
(7) Mount the valve stem nuts to the 2-way and 3-
(2) Open the valve stem of the 2-way valve coun-
terclockwise approximately 90°, wait 10 sec-
onds, and then set it to closed position.
– Be sure to use a hexagonal wrench to operate
the valve stem.
way valves.
(8) Check for gas leakage.
– At this time, especially check for gas leakage
from the 2-way and 3-way valve’s stem nuts,
and from the service port nut.
(3) Check for gas leakage.
– Check the flare connections for gas leakage.
CAUTION: If gas leakage are discovered
in step (3) above, take the following
mesures :
(4) Purge the air from the system.
– Set the 2-way valve to the open position and
remove the cap from the 3-way valve’s service
port.
If the gas leaks stop when the piping connections
are tightened further, continue working from step (4).
If the gas leaks do not stop when the connections
are retightened, repair the location of the leak, dis-
charge all of the gas through the service port, and
then recharge with the specified amount of gas from
a gas cylinder.
– Using the hexagonal wrench to press the valve
core pin, discharge for three seconds and then
wait for one minute. Repeat this three times.
(5) Use torque wrench to tighten the service port
nut to a torque of 1.8kg.cm.
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Troubleshooting Guide
Pumping Down
Liquid side
2-Way
Indoor unit
Outdoor unit
Open
valve
Gas side
Closed
3-Way
valve
Lo
CLOSE
Purge the air
CLOSE
• Procedure
(6) Operate the air conditioner at the cooling
cycle and stop it when the gauge indicates
1kg/cm2g.
(1) Confirm that both the 2-way and 3-way valves
are set to the open position.
– Remove the valve stem caps and confirm that
the valve stems are in the raised position.
– Be sure to use a hexagonal wrench to operate
the valve stems.
(7) Immediately set the 3-way valve to the closed
position.
– Do this quickly so that the gauge ends up indi-
cating 3 to 5kg/cm2g.
(2) Operate the unit for 10 to 15 minutes.
(8) Disconnect the charge set, and mount the 2-
way and 3-way valve’s stem nuts and the ser-
vice port nut.
(3) Stop operation and wait for 3 minutes, then
connect the charge set to the service port of
the 3-way valve.
– Use torque wrench to tighten the service port
nut to a torque of 1.8 kg.m.
– Be sure to check for gas leakage.
– Connect the charge hose with the push pin to
the service port.
(4) Air purging of the charge hose.
– Open the low-pressure valve on the charge set
slightly to air purge from the charge hose.
(5) Set the 2-way valve to the closed position.
Service Manual 61
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Troubleshooting Guide
Re-air Purging
(Re-installation)
Liquid side
3-Way
Indoor unit
Closed
Outdoor unit
valve
Gas side
Closed
3-Way
valve
Gas cylinder
Lo
R22
OPEN
CLOSE
• Procedure
(6) Disconnect the charge set and the gas cylin-
der, and set the Liquid side and Gas side
(1) Confirm that both the liquid side valve and the
gas side valve are set to the closed position.
valves to the open position.
– Be sure to use a hexagonal wrench to operate
(2) Connect the charge set and a gas cylinder to
the service port of the Gas side valve.
the valve stems.
– Leave the valve on the gas cylinder closed.
(7) Mount the valve stem nuts and the service
port nut.
(3) Air purging.
– Use torque wrench to tighten the service port
nut to a torque of 1.8 kg.m.
– Be sure to check for gas leakage.
– Open the valves on the gas cylinder and the
charge set. Purge the air by loosening the flare
nut on the liquid side valve approximately 45°
for 3 seconds then closing it for 1 minute;
repeat 3 times.
CAUTION: Do not leak the gas in the air
during Air Purging.
– After purging the air, use a torque wrench to
tighten the flare nut on liquid side valve.
(4) Check for gas leakage.
– Check the flare connections for gas leakage.
(5) Discharge the refrigerant.
– Close the valve on the gas cylinder and dis-
charge the refrigerant until the gauge indicates
3 to 5 kg/cm2g.
62 Room Air Conditioner
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Troubleshooting Guide
Balance Refrigerant of the 3-way Valve
(Gas leakage)
Liquid side
Indoor unit
Outdoor unit
3-Way
valve
Open
Gas side
3-Way
valve
Open
Lo
OPEN
CLOSE
• Procedure
(1) Confirm that both the 2-way and 3-way valves
are set to the back seat.
(3) Open the valve (Lo side) on the charge set and
discharge the refrigerant until the gauge indi-
cates 0 kg/cm2G.
(2) Connect the charge set to the 3-way valve’s
port.
– If there is no air in the refrigerant cycle (the
pressure when the air conditioner is not running
is higher than 1 kg/cm2G), discharge the refrig-
erant until the gauge indicates 0.5 to 1
kg/cm2G. if this is the case, it will not be neces-
sary to apply a evacuatin.
– Leave the valve on the charge set closed.
– Connect the charge hose to the service port.
– Discharge the refrigerant gradually; if it is dis-
charged too suddenly, the refrigeration oil will
also be discharged.
Service Manual 63
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Troubleshooting Guide
Evacuation
(All amount of refrigerant leaked)
Liquid side
Indoor unit
Outdoor unit
3-Way
valve
Open
Gas side
3-Way
valve
Open
Vacuum pump
Lo
OPEN
CLOSE
• Procedure
(1) Connect the vacuum pump to the center hose
of charge set center hose
(3) Close the valve (Lo side) on the charge set,
turn off the vacuum pump, and confirm that
the gauge needle does not move (approxima-
tely 5 minutes after turning off the vacuum
pump).
(2) Evacuation for approximately one hour.
– Confirm that the gauge needle has moved
toward -76 cmHg (vacuum of 4 mmHg or less).
(4) Disconnect the charge hose from the vacuum
pump.
– Vacuum pump oil.
If the vacuum pump oil becomes dirty or
depleted, replenish as needed.
64 Room Air Conditioner
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Troubleshooting Guide
Gas Charging
(After Evacuation)
Liquid side
3-Way
Indoor unit
Outdoor unit
Open
valve
Gas side
Open
3-Way
valve
Check valve
Charging
cylinder
Lo
(1)
OPEN
CLOSE
• Procedure
\
(1) Connect the charge hose to the charging
cylinder.
This is different from previous procedures.
Because you are charging with liquid refrigerant
from the gas side, absolutely do not attempt to
charge with larger amounts of liquid refrigerant
while operating the air conditioner.
– Connect the charge hose which you dis-con-
nected from the vacuum pump to the valve at
the bottom of the cylinder.
– If you are using a gas cylinder, also use a
scale and reverse the cylinder so that the sys-
tem can be charged with liquid.
(4) Immediately disconnect the charge hose from
the 3-way valve’s service port.
(2) Purge the air from the charge hose.
– Open the valve at the bottom of the cylinder
and press the check valve on the charge set to
purge the air. (Be careful of the liquid refriger-
ant). The procedure is the same if using a gas
cylinder.
– Stopping partway will allow the gas to be dis-
charged.
– If the system has been charged with liquid
refrigerant while operating the air conditioner
turn off the air conditioner before disconnecting
the hose.
(3) Open the valve (Lo side on the charge set and
charge the system with liquid refrigerant.
– If the system can not be charged with the spec-
ified amount of refrigerant, it can be charged
with a little at a time (approximately 150g each
time) while operating the air conditioner in the
cooling cycle; however, one time is not suffi-
cient, wait approximately 1 minute and then
repeat the procedure (pumping down-pin).
(5) Mount the valve stem nuts and the service
port nut.
– Use torque wrench to tighten the service port
nut to a torque of 1.8 kg.m.
– Be sure to check for gas leakage.
Service Manual 65
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Troubleshooting Guide
Cycle Parts
Trouble analysis
1. Check temperature difference between intake and discharge air and operating current.
Temp. difference : approx. 0°C
• All amount of refrigerant leaked
out. Check refrigeration cycle.
Current
: less than 80% of
rated current
Temp. Difference
Operating Current
• Refrigerant leakege
Clog of refrigeration cycle
Defective compressor
Temp. difference : approx. 8°C
Current
: less than 80% of
rated current
Temp. difference : less than 8°C
• Excessive amount of refrigerant
Current
: over the reated
current
• Normal
Temp. difference : over 8°C
NOTICE
Temperature difference between intake and discharge air depends on room air humidity. When the room air
humidity is relativery higher, temperature difference is smaller. When the room air humidity is relatively lower tem-
perature difference is larger.
2. Check temperature and pressure of refrigeration cycle.
Suction pressure
(Compared with
the normal value)
Temperature
(Compared with
the normal valve)
Cause of Trouble
Description
Defective compressor
Defective 4-way reverse valve
Current is low.
High
Higher
Excessive amount of
refrigerant
High pressure does not quickly
rise at the beginning of
operation.
Normal
Insufficient amount of
refrigerant (Leakage)
Clogging
Current is low.
Current is low.
Lower
Higher
NOTICE
1. The suction pressure is usually 8.5~9.5kg/cm2G(Cooling) at normal condition.
2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with
putty.
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Troubleshooting Guide
Self-diagnosis function
1. The malfunction indicator of indoor (see the operating LED of the INDOOR)
Error
Code
The cause of malfunction
Malfunction indicator
The operating state
Keep operating state.
Indoor TH. is short or open.
The operating LED will be blink-
ing once.
1
Keep operating state.
Outdoor TH. is short or open. The operating LED will be blink-
ing twice.
2
4
Temp. of Heat sink is over 95°C. The operating LED will be blink-
Restart compressor when Heat sink
Temp is 85°C below.
/Heat sink TH. is short or open.
ing 4 times.
Comunication error (serial
comunication).
The operating LED will be blink-
ing 5 times.
The operation is off(enable to restart
by remote controller).
5
DC peak error.
The operating LED will be blink-
ing 6 times.
Compressor will be turned off immediately.
(not enable to restart by remote controller)
6
7
Running current is over-
loaded. (CT2)
The operating LED will be blink-
ing 7 times.
Compressor will be turned off immediately.
(not enable to restart by remote controller)
The operating LED will be blink-
ing 8 times.
Indoor fan lock error
(BLDC fan model)
The operation is off(enable to restart
by remote controller).
8
9
The operating LED will be blink-
ing 9 times.
Outdoor fan lock error
(BLDC fan model)
The operation is off(enable to restart
by remote controller).
Compressor will be turned off immediately.
(restart compressor when D-PIPE TH. is
recovred)
The operating LED will be blink-
ing 10 times.
D-PIPE TH is short or open.
10
➔➔Error code ➔, ➔ can’t be operated unless the power cord is removed.
2. The malfunction indicator of outdoor (see the LED01M on the outdoor PCB ass’y)
Error
Code
The cause of malfunction
Malfunction indicator
The operating state
Keep operating state.
Indoor TH. is short or open.
The LED01M will be blinking
twice.
2
Restart compressor when heat sink
Temp. is 85°C below.
Temp. of Heat sink is over 95°C, The LED01M will be blinking 4
or Heat sink TH. is shortor open. times.
4
5
Comunication error (serial
comunication).
The LED01M will be blinking 5
times.
The operation is off(enable to restart
by remote controller).
DC peak error.
The LED01M will be blinking 6
times.
Compressor will be turned off immediately.
(not enable to restart by remote controller)
6
7
Running current is over-
loaded.
The LED01M will be blinking 7
times.
Compressor will be turned off immediately.
(not enable to restart by remote controller)
Outdoor fan lock error
(BLDC fan model)
The LED01M will be blinking 9
times.
The operation is off(enable to restart
by remote controller).
9
Compressor will be turned off immediately.
(restart compressor when D-PIPE TH. is
recovered)
D-PIPE TH is short or open.
The LED01M will be blinking 10
times.
10
Service Manual 67
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Troubleshooting Guide
➔ Precaution in Service or Check
Even after stopping the operation of product, it takes some time to discharge the remaining electricity of the
electrolytic capacitor that was charged. Before starting a checking or repairing job, pull out the plug out of the
outlet and make sure that the lamp on the control board outdoor unit is off.
➔ The Diagnosis Procedure
Check the supplied voltage to product (AC 220V/230V ± 30V).
Check the connecting cable between Indoor and Outdoor.
Check the blinking number of operation indicator
(refer to the self-diagnosis function).
Check the self-diagnosis table
Indoor
Outdoor
• Check the condition of connectors.
• The condition of P.C.B pattern.
• The electronic components.
• Check the condition of connectors
• The condition of P.C.B pattern.
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Troubleshooting Guide
Electronic Parts
➔ Refer to electronic contorol device drawing & schematic diagram.
The Product doesn’t operate at all.
Trouble 1
Turn off the main power and wait to 10 seconds
Turn on the main power again.
Does "Beeping" sound is made from the indoor unit?
NO
YES
• Primarily, the operating condi-
tion of Micom is O.K.
Check the voltage of power(AC220V/AC240V, 50Hz).
• The voltage of main power.
• The voltage applied to the unit.
• The connecting method of Indoor/Outdoor connecting cable (each color)
• The P.C.B. Ass'y
(Fuse, Noise Filter, Power Module, Bridge Diode, etc.)
•
Check CN-DISP1
CN-DISP2 of indoor DC PCB
The operation check of the Indoor P.C.B. Ass'y
Procedure
Specification
1) AC230V ± 30V
: Check the rated voltage
Remedy
1) The input voltage of power mod-
ule.
1) Check the power outlet.
2) The output voltage of power mod- 2) 12V ± 3V
ule.
2) Replace
P.C.B Ass'y
4) IC02D(7805)
4) DC5V
4) Replace P.C.B Ass'y
5) Replace P.C.B Ass'y
5) IC01A(KIA7036)
5) The voltage of micom pin 19
: DC4.5V↑
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Troubleshooting Guide
Product doesn't operate with the remote controller.
Trouble 2
Turn on main power.
While the compressor has been stopped, the compressor does not operate
owing to the delaying function for 2 minutes after stopped.
When the compressor stopped Indoor Fan is driven by a low speed.
At this point the wind speed is not controlled by the remote controller.
(When operated in the Sleeping Mode, the wind speed is set to the low speed as force).)
Caused by other parts except
Caused by the remote controller.
the remote controller
When the mark (
) is displayed in LCD
Check the contact of CN-DISP 1, 2 connector
screen, replace battery.
Check DISP P.C.B Ass'y
-Voltage between CN-DISP1
-
: DC +5V
Check point
• Check the connecting circuit between
MICOM PIN and CN-DISP1 PIN
• Check receiver ass'y
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Troubleshooting Guide
The Compressor/Outdoor Fan are unable to drive.
Trouble 3
Turn on the main power.
Operate Cooling Mode by setting the disired temperature of the remote controller is less
than one of the Indoor temperature by 1°C at least.
When in air circulation mode, compressor/outdoor fan is stopped.
Check the sensor for Indoor temperature is attatched as close as to be effected by the
themperature of Heat Exchange (EVA.)
When the sensor circuit for Indoor temperature and connector are in bad connection or are
not engaged, Compressor/Outdoor fan is stopped.
• Check the related circuit of R02H(12.1K), R01H(6.2K), R04H(1K), R03H(1K), C01H(102),
C02H(102), Micom(pin No.
,
).
•
Check the Indoor temperature sensor is disconnected or not (Resistance is about 10K at 25°C).
Check the Relay(RY-PWR) for driving Compressor.
• Check the voltage between brown and blue cable of terminal to connect the Outdoor
(About AC220V / 240V).
• Check the related circuit of relay in Outdoor PCB Ass'y.
Check Point
Comp. ON
DC 5V
Comp. OFF
DC 0V
46
Between Micom(No. ) and
GND
15
Between IC01M(No. ) and
GND
DC 1V↓
DC 12V
Turn off main power.
Check the electrical wiring diagram of Outdoor side.
Check the open or short of connecting wires between Indoor and Outdoor.
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Troubleshooting Guide
When indoor Fan does not operate.
Trouble 4
Turn off main power.
Check the connection of CN-MOTOR.
Check the Fan Motor.
Check the Fuse(AC250V, T2A).
Check the related circuit of indoor Fan Motor.
• The pin No.45 of micom and the part for driving SSR.
• Check the related pattern.
• Check the SSR.
- SSR Open: Indoor Fan Motor never operate.
- SSR short: Indoor Fan Motor always operates in case of ON or OFF.
Turn on the main power
Check the SSR high speed operation by remote control.
(the Indoor Fan Motor is connected)
The voltage of Pin No 1(orange) and 3(black) of CN-MOTOR.
About AC 180V over
SSR is not damaged
About AC 50V over
Check SSR
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Troubleshooting Guide
When the horizontal louver does not operate.
Trouble 5
• Confirm that the vertical louver is normally geared with the shaft of Stepping Motor.
• If the regular torque is detected when rotating the vertical louver with hands ⇒ Normal
• Check the connecting condition of CN-U/D Connector
• Check the soldering condition(on PCB) of CN-U/D Connector
Check the operating circuit of the vertical louver
• Confirm that there is DC +12V between pin ➔ of CN-U/D and GND.
• Confirm that there is a soldering short at following terminals.
- Between
- Between
- Between 10 11 , 12 and 13 of IC01M
41
,
,
,
42
,
43
and
and
44
of MICOM
of IC01M
4
5 ,
6
7
If there are no problems after above checks.
• Confirm the assembly condition that are catching and interfering parts in the link of the
vertical louver
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Troubleshooting Guide
The heater does not operate at all.
Trouble 6
Turn off main power
Check the wire connection of PTC Heater (Refer to Wiring Diagram)
• Check the connecting condition of CN-PTC connector on the indor DC P.C.B Ass'y.
• Check the soldering condition of CN-PTC connector on the indoor DC P.C.B Ass'y.
Check the Heater driving Circuit.
48
7
10
• Check the pattern between MICOM Pin No.
➔ IC02M Pin No. ➔ IC02M Pin No. ➔ CN-PTC
If there is no problem result of all above check.
• Inner side disconnection of PTC Heater unit or restriced operating condition of PTC Heater
(pipe temp. is over 45°C, defrosting operation, compressor off, indoor fan off).
74 Room Air Conditioner
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Troubleshooting Guide
The Outdoor Unit does not operate at all.
Trouble 7
YES
Does the Operating LED of indoor unit blink
when Operation's ON?
Refer to the self-diagnosis function.
NO
NO
NO
Is the Connection between indoor power
relay Pin ➔ and terminal block No. 1 right?
Check the connecting state of connector
YES
Indoor
Outdoor
Is the connection of cable between indoor
and outdoor unit right?
1(Brown)
2(Blue)
1(Brown)
2(Blue)
3(Green/YL)
4(Red)
3(Green/YL)
4(Red)
YES
NO
NO
NO
Is the voltage of Terminal Block
outdoor Control Box about AC220V /
240V?
,
in
Check the Fuse of Outdoor PCB Ass'y.
YES
Is the voltage of NF01J ➔, ➔ in outdoor
PCB Ass'y about AC220V / 240V when
Operation's ON?
Check the PTC and RY-PWR.
YES
Is the Bridge Diode(BD01S) right?
NO
Check the Bring Diode.
Replace the PCB Ass'y.
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Troubleshooting Guide
When compressor does not operate normally.
Trouble 8-1
➔ DC Peak Error(Error Code ➔)
NO
Does the LED01M of outdoor PCB Ass'y
blink 6 times?
Check the state of connecting cable (3 line)
between indoor and outdoor uint.
YES
NO
Is the connecting state of connectors in out-
door. PCB Ass'y right?
(CN-UVW)
• Electrical wiring diagram (Colors)
• Check the connecting state of connectors
in PCB Ass'y
• If CN-UWV is connected, the comprressor
can be operated a opposite direction.
YES
NO
• Check the short P-N P-U, V, W, and N-U,
V, W of IPM and then collector, emiter of
IGBT
Is the power module in PCB Ass'y right?
YES
NO
NO
Is the voltage of T/Block
AC150V?
,
over than
Check the supplied voltage.
YES
Is the voltage of GND-IPM(32 pin) over
than about DC280V?
• Check the DC voltage between IPM 1pin
GND
YES
NO
Supply the refrigerant or Discharge refriger-
ant.
Is the refrigerant pressure right?
NO
Replace the PCB Ass'y.
• Main PCB Ass'y
• Control Box Ass'y
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Troubleshooting Guide
When compressor does not oprate normally.
Trouble 8-2
➔ Communication error between Indoor and Outdoor (Error Code ➔)
NO
• Check the state of connecting cable
(3 line) bewteen indoor and outdoor unit .
• Check Fuse, Noise Filter, PTC, etc.
Does the operating LED in display PCB
Ass'y blink 5 times?
YES
NO
NO
• Electrical wiring diagram(Colors)
• Check the connecting state
of connectors in outdoor PCB Ass'y
• Check the Fuse of outdoor PCB Ass'y.
Is the voltage of BR/BK, RD AC220/240V in
Main PCB Ass'y.
YES
Is the connection of CN-T/Block and in
CN-AC/DC indoor P.C.B Ass'y is right?
• Reconnect the connectors.
• Check the PCB pattern(Resoldering).
YES
Replace the PCB Ass'y.
• Main PCB Ass'y (Indoor/Outdoor)
• Control Box Ass'y.
Service Manual 77
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Troubleshooting Guide
When compressor does not oprate normally.
Trouble 8-3
➔ CT Error (Error Code ➔)
NO
• Check the state of connecting cable
(3 line) bewteen Indoor and Outdoor Unit .
• Check fuse, Noise Filter, PTC, etc.
Does the operating LED in Display PCB
Ass'y blink 7 times?
YES
NO
Is the courrent transformer(CT) in Main
PCB Ass'y right?
Check the PCB pattern(resoldering)
YES
NO
NO
Is the indoor/outdoor fan locked?
YES
Check the indoor/outdoor fan motor.
Check the compressor.
Is the discharge temperature of Indoor unit
right(11°C~17°C) in the cooling mode?
YES
NO
Supply the refrigerant or Discharge the
refrigerant.
Is the refrigerant pressure right?
YES
Replace the PCB Ass'y.
• Main PCB Ass'y(Outdoor)
• Control Box Ass'y(Outdoor)
78 Room Air Conditioner
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Troubleshooting Guide
➔ The problem of missing the connector (INDOOR MAIN PCB ASSY)
Connectors
Condition
Problem (error mode)
• Malfunctions all indoor & outdoor unit.
• Malfunctions remocon, force, test operation mode.
OPEN
CN-AC/DC
CN-FAN
• Malfunctions indoor fan motor.
OPEN
OPEN
• Malfunctions outdoor unit.
• Stop compressor and outdoor fan motor.
• The operation LED blinks 5 times.
• Communication error.
CN-T/Block
•
Malfunctions remote contoller.
OPEN
OPEN
CN-DISP1
CN-DISP2
• Don't operate the power display module.
•
Don't operate the power display module.
• The operation LED blinks twice.
• Enable to receive remote singnal.
CN-TH
OPEN/SHORT
OPEN
• Malfunctions UP/DOWN step motor.
• Don't operate louver.
CN-U/D
➔ The problem of missing the connector (OUTDOOR MAIN PCB ASSY)
Condition
OPEN
Connectors
CN-4 WAY
CN-FAN
Problem (error mode)
• Malfunctions 4-WAY valve.
• Malfunctions fan
OPEN
• The operation LED blinks twice.
• The LED01M blinks twice.
CN-TH
OPEN/SHORT
OPEN/SHORT
OPEN
• The LED01M blinks 10 times.
• Continue Comp. operation.
(when the discharge pipe TH opens)
• Stop Comp. operation
CN-D-PIPE
(when the discharge pipe TH shorts)
• Stop compressor.
CN-UVW
Service Manual 79
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Exploded View
Exploded View
Indoor Unit
135312
159830
152302
668713-2
135080-1
146811-2
145200
668713-1
135314
237900
733010
135080-2
267110
359011
342800
354210
131410
352150
346810
249951
264110
W0CZZ
266090
35211B
263230
146811-1
147581
135311
268714
135516
80 Room Air Conditioner
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Exploded View
Outdoor Unit
437210
263230
437212
554031
435301
435511
546810
552102
559010
649950
552201
552111
552116
447910
668711
552202
561410
554160
661400
550140
552203-1
430410
552203-2
Service Manual 81
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Replacement Parts List
Replacement Parts List
Indoor Unit
PART No.
LOCATION
No.
DESCRIPTION
REMARKS
AS-W096U*H0
3141A20007B
3508A20034E
3508A20034F
3531A10137B
3531A21004W
3531A21004Z
3531A21024B
3531A21024A
3531A21010E
3531A21010B
3531A21010C
3531A21010A
3551A20050C
4520A20008A
4681A20055A
5230A20022A
5983A10006T
5990A20015B
3790A20046E
4995A20287N
6323A20004H
6411A20014V
6609A10005A
6711A20077Y
6871A20463C
6871A10104B
4280A20004B
4681A20048R
5211AR7066P
5251AR1222R
5421A20105C
5901A20016A
6871A20258B
6871A20259A
1H00843A
AS-W126U*H0
AS-W096U*H1
3141A20007B
3508A20034E
3508A20034F
3531A10137B
AS-W126U*H1
3141A20007B
3508A20034E
3508A20034F
3531A10137B
3531A21004W
3531A21004Z
3531A21024B
3531A21024A
3531A21010E
3531A21010B
3531A21010C
3531A21010A
3551A20050C
4520A20008A
4681A20055A
5230A20022A
5983A10006T
5990A20015B
3790A20083A
4995A20486Y
6323A20004H
6411A20014U
6609A10005D
6711A20077Y
6871A20463C
6871A10104E
4280A20004B
4681A20048R
5211AR7066N
5251AR1222R
5421A20086D
5901A20016J
6871A20258B
6871A20259A
1H00843A
131410
135080
135080
135311
135312
CHASSIS ASSEMBLY
DECORATION(TOP)
3141A20007B
3508A20034E
3508A20034F
3531A10137B
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
DECORATION(BOTTOM)
GRILLE ASSEMBLY,DISCHARGE
GRILLE ASSEMBLY,FRONT
MIRROR
3531A21004W 3531A21004W
BLUE
3531A21004Z
3531A21024B
3531A21024A
3531A21010E
3531A21010B
3531A21010C
3531A21010A
3551A20050C
4520A20008A
4681A20055A
5230A20022A
5983A10006T
5990A20015B
3790A20046E
4995A20287S
6323A20004H
6411A20026T
6609A10005A
6711A20077Y
6871A20463C
6871A10104B
4280A20004B
4681A20048R
3531A21004Z
3531A21024B
3531A21024A
3531A21010E
3531A21010B
3531A21010C
3531A21010A
3551A20050C
4520A20008A
4681A20055A
5230A20022A
5983A25003H
5990A20015B
3790A20083A
4995A20486X
6323A20004H
6411A20014U
6609A10005D
6711A20077Y
6871A20463C
6871A10104D
4280A20004B
4681A20048R
WHITE
METAL
MIRROR
BLUE
135314
GRILLE ASSEMBLY,INLET
WHITE
METAL
135516
145200
146811
152302
159830
159901
237900
249951
263230
264110
266090
267110
268712
268714
342800
346810
35211B
352150
354210
359011
668713
668713
733010
W0CZZ
COVER ASSEMBLY,MOTOR
LINK
MOTOR ASSEMBLY,STEP
FILTER(MECH),A/C
AIR CLEANER ASSEMBLY
VANE,HORIZONTAL
WINDOW,DISPLAY
CONTROL BOX ASSEMBLY,INDOOR
THERMISTOR ASSEMBLY
POWER CORD ASSEMBLY
H.V ASSEMBLY
REMOTE CONTROLLER ASSEMBLY
PWB(PCB) ASSEMBLY,DISPLAY
PWB(PCB) ASSEMBLY,MAIN
BEARING
MOTOR ASSEMBLY,INDOOR
TUBE ASSEMBLY,TUBING
HOSE ASSEMBLY,DRAIN
EVAPORATOR ASSEMBLY,FIRST
FAN ASSEMBLY,CROSS FLOW
PWB(PCB) ASSEMBLY,SUB
PWB(PCB) ASSEMBLY,SUB
PLATE
5211AR7066N 5211AR7066P
5251AR1222R 5251AR1222R
5421A20105A
5901A20016A
6871A20258B
6871A20259A
1H00843A
5421A20086D
5901A20016J
6871A20258B
6871A20259A
1H00843A
CAPACITOR,DRAWING
3H01487A
3H01487A
3H01487A
3H01487A
NOTE) Please ensure GCSC since these parts may be changed depending upon the buyer's request.
*
(GCSC WEBSITE http://[email protected])
82 Room Air Conditioner
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Replacement Parts List
Outdoor Unit
PART No.
LOCATION
No.
DESCRIPTION
REMARKS
AS-W096U*H0
6323A20003G
3041A20008M
3551A30058Z
3721A20027H
3721A20026B
4791A30002G
4681A20068G
4H00982E
AS-W126U*H0
AS-W096U*H1
AS-W126U*H1
263230 THERMISTOR ASSEMBLY
430411 BASE ASSEMBLY,OUTDOOR
435511 COVER ASSY, CONTROL(OUTDOOR)
437210 PANEL ASSY, FRONT SUB
437212 PANEL ASSY, REAR
6323A20003G 6323A20003G 6323A20003G
3041A20008Z 3041A20066A 3041A20066C
3551A30066A 3551A30115G 3551A30115G
3721A20027H 3721A20027Q 3721A20027Q
3721A20026F 3721A20026M 3721A20026M
4791A30002K 4791A30002G 4791A30002G
4681A20122A 4681A20122A 4681A20122A
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
447910 BARRIER ASSY, OUTDOOR
546810 MOTOR ASSEMBLY, OUTDOOR
550140 ISOLATOR,COMP
4H00982E
4H00982E
4H00982E
552111 TUBE ASSEMBLY, CAPILLARY
552116 TUBE ASSEMBLY, REVERSING
552202 VALVE,REVERSING
5211A30331X
5211A10260F
5220AR3228F
5220A20001Q
2H02479P
5211A30331U 5211A33058A 5211A33058A
5211A30698A 5211A21491B 5211A21491D
5220AR3228F 5220AR3228D 5220AR3228D
5220A20006F 5220A20001Q 5220A20006F
552203-1 VALVE,SERVICE
552203-2 VALVE,SERVICE
2H02479P
5220A20005B 5220A20005B
554031 CONDENSER ASSY, BENT
554160 COMPRESSOR
5403A20019V
5416A90008B
5901A10033A
6141AR3509J
4995A20203U
5874A90003A
6871A10098F
5403A20028T 5403A20019V 5403A20019V
5416A90008A 5416A90028A 5416A90029A
5901A10033A 5901A10033A 5901A10033A
6141AR3509J 6141A20010S 6141A20010S
4995A20203Z 4995A20520F 4995A20520G
5874A90003A 5874A90003A 5874A90003A
6871A10098J 6871A10135F 6871A10135D
559010 FAN ASSEMBLY, PROPELLER
561410 COIL ASSY, REVERSING VALVE
649950 CONTROL BOX ASSY
661400 REACTOR
668711 PCB ASSY
NOTE) Please ensure GCSC since these parts may be changed depending upon the buyer's request.
*
(GCSC WEBSITE http://biz.LGservice.com)
Service Manual 83
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October, 2005
P/No.: 3828A20061Z
Printed in Korea
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