LG LS-H0766KA2 User manual

LG
Room Air Conditioner
SERVICE MANUAL
LG
MODELS: AS-H0766KA2 LS-H0766KA2
AS-H0966KA2 LS-C0966KA2
AS-H126RKA2 LS-H0966KA2
AS-H186TKA2 LS-C126RKA2
LS-H246TKA2 LS-H126RKA2
CAUTION
website http://biz.LGservice.com
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

2Room Air Conditioner
Air Conditioner Service Manual
TABLE OF CONTENTS
LG Model Name ...............................................................................................................................................3
Safety Precautions..........................................................................................................................................5
Dimensions....................................................................................................................................................10
Symbols Used in this Manual...................................................................................................................10
Indoor Unit................................................................................................................................................10
Outdoor Unit.............................................................................................................................................11
Product Specifications .................................................................................................................................14
Installation .....................................................................................................................................................16
Selection of the Best Location..................................................................................................................16
Piping Length and Elevation.....................................................................................................................16
How to Fix Installation Plate .....................................................................................................................17
Drill a Hole in the Wall ..............................................................................................................................17
Drain hose junction...................................................................................................................................17
Flaring work and connection of piping .......................................................................................................18
Flaring work..............................................................................................................................................18
Connection of Piping Indoor.....................................................................................................................18
Connection of the Pipes-Outdoor.............................................................................................................22
Connecting the cable between indoor unit and outdoor unit ...................................................................23
Connect the Cable to the Indoor Unit.......................................................................................................23
Connect the Cable to the Outdoor Unit ....................................................................................................24
Checking the drainage and forming the pipings........................................................................................25
Checking the Drainage.............................................................................................................................25
Form the Piping........................................................................................................................................25
AIR PURGING ................................................................................................................................................26
Air purging................................................................................................................................................26
Air purging with vacuum pump .................................................................................................................26
Test Running .................................................................................................................................................28
Operation .......................................................................................................................................................29
Function of Controls .................................................................................................................................29
Display Function ......................................................................................................................................33
Self-diagnosis Function............................................................................................................................33
Remote Control Operations......................................................................................................................34
Disassembly ..................................................................................................................................................35
Indoor Unit................................................................................................................................................35
Schematic Diagram.......................................................................................................................................38
Electric Control Device .............................................................................................................................38
Wiring Diagram.........................................................................................................................................39
Components Location ..............................................................................................................................40
Troubleshooting Guide .................................................................................................................................42
Refrigeration Cycle Diagram ....................................................................................................................42
2-way, 3-way Valve .................................................................................................................................43
Cycle Parts...............................................................................................................................................49
Electronic Parts ........................................................................................................................................50
Exploded View...............................................................................................................................................57
Replacement Parts List ................................................................................................................................62

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

4Room Air Conditioner
2004~
12 - 345678910
Code Type Code of Model Meaning
1 Producing Center, A~Z L: Chang-won R22 N: India
Refrigerant A: Chang-won R410A Z: Brazil
C: Chang-won R407C D: Indonesia
T: China M: Mexico
K: Turkey R22 V: Vietnam
E: Turkey R410A S: Out Sourcing
H: Thailand
2 Product Type A~Z S: Split Type Air Conditioner
3 Cooling/Heating/Inverter A~Z C: Cooling only
H: Heat pump
X: C/O + E/Heater
Z: H/P + E/Heater
V: AC Inverter C/O
N: AC Inverter H/P
Q: DC Inverter C/O
W: DC Inverter H/P
4, 5 Capacity 0~9 Cooling/Heating Capacity
Ex. "09" →9,000 Btu/h
6 Electric Range 1~9 1: 115V/60Hz, A: 220V, 50Hz, 3Phase
A~Z 2: 220V/60Hz B: 208~230V, 60Hz, 3Phase
3: 208-230V/60Hz C: 575V, 50Hz, 3Phase
5: 200-220V/50Hz D: 440~460, 60Hz, 3Phase
6: 220-240V/50Hz E: 265V, 60Hz
7: 110V, 50/60Hz F: 200V
CHASSIS Look
D
K
L
G
M
N
D
P
Division
Panel Type(Deluxe)
Fighting 'Look'
(LG1)
(LG2)-SEMI PANEL
OEM1
OEM2
Panel Type(Deluxe)
LG3
, 50/60Hz
8: 380-415V/50Hz
9: 380-415V/60Hz
7 Chassis A~Z Name of Chassis of Unit
Ex. LSP →SP Chassis
8 Look A~Z Look,
Color (Artcool Model)
9 Function A~Z
10 Serial No. 1~9 LG Model De
* ARTCOOL COLOR
velopment Serial No.
Basic A
Basic+4Way B
Plasma Filter C
Plasma Filter+4 Way D
Tele+LCD E
Tele+LCD+Nano plasma+4Way F
Nano Plasma F+(A/changeove)+A/clean+Low A G
Nano Plasma F+(A/changeove)+A/clean+4way+Low A H
Tele+LED+4way I
Internet J
Plasma F+4Way+Oxy generator K
Nano Plasma F+(A/changeove)+A/clean L
Nano Plasma F+(A/changeove)+A/clean+4way M
Nano Plasma F+(A/changeove)+A/clean+PTC N
Nano Plasma F+(A/changeove)+Autoclean+4way+PTC P
Nano Plasma F+(A/changeove)+A/clean+4way+Low A+PTC Q
Negative ION+A/Clean R
(Nano)Plasma+Negative ION+A/Clean S
4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean T
Nano Plasma F+4Way+(A/changeove)+A/clean+ U
R Mirror
W White
B Blue
D Wood
M Metal
C Cherry
S4/S5
S6
SQ
SR
ST
ST2

Service Manual 5
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
■Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
■Meanings of symbols used in this manual are as shown below.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
Be sure not to do.
Be sure to follow the instruction.
Do not use damaged power cords, plugs, or a
loose socket.
Always use the power plug and socket with the
ground terminal.
• There is risk of fire of electric shock. • There is risk of electric shock.
Install the panel and the cover of control box
securely.
.Do not modify or extend the power cord.
• There is risk of fire of electric shock. • No grounding may cause electric shock.
■Installation

6Room Air Conditioner
Safety Precautions
Do not install the product on a defective instal-
lation stand.
Be sure the installation area does not
deteriorate with age.
• It may cause injury, accident, or damage to the
product.
• If the base collapses, the air conditioner could fall
with it, causing property damage, product failure,
and personal injury.
• Sharp edges could cause injury. Be especially care-
ful of the case edges and the fins on the condenser
and evaporator.
• There is risk of fire, electric shock, explosion, or injury.
Be cautious when unpacking and installing the
product.
For installation, always contact the dealer or
an Authorized service center
For re-installation of the installed product,
always contact a dealer or an authorized ser-
vice center.
Do not install, remove, or re-install the unit by
yourself.
• There is risk of fire, electric shock, explosion, or
injury.
• There is risk of fire, electric shock, explosion, or
injury.

Service Manual 7
Safety Precautions
■Operation
Do not turn the air-conditioner ON or OFF by
plugging or unplugging the power plug.
Use a dedicated outlet for this appliance.
• There is risk of fire or electrical shock. • There is risk of fire or electrical shock.
Grasp the plug to remove the cord from the
outlet. Do not touch it with wet hands.
Do not place a heater or other appliances near
the power cable.
• There is risk of fire or electrical shock. • There is risk of fire and electric shock.
Do not allow water to run into electrical parts. Do not store or use flammable gas or com-
bustibles near the air conditioner.
• There is risk of fire, failure of the product, or electric
shock.
• There is risk of fire or failure of product.
Wax
Thinner

8Room Air Conditioner
Always check for gas (refrigerant) leakage after
installation or repair of product.
Install the drain hose to ensure that water is
drained away properly.
• Low refrigerant levels may cause failure of product. • A bad connection may cause water leakage.
Keep level even when installing the product. Use two or more people to lift and transport
the air conditioner.
• To avoid vibration or water leakage. • Avoid personal injury.
■Installation
90˚
Unplug the unit if strange sounds, odors, or
smoke comes from it.
Be cautious that water could not enter the
product.
• There is risk of electric shock or fire. • There is risk of fire, electric shock, or product dam-
age.
Safety Precautions

Service Manual 9
Use a soft cloth to clean. Do not use harsh
detergents, solvents, etc.
Do not touch the metal parts of the product
when removing the air filter. They are very
sharp!
• There is risk of fire, electric shock, or damage to the
plastic parts of the product.
• There is risk of personal injury.
Do not step on or put anyting on the product.
(outdoor units)
Do not insert hands or other objects through
the air inlet or outlet while the air conditioner
is plugged in.
• There is risk of personal injury and failure of product. • There are sharp and moving parts that could cause
personal injury.
■Operation
Wax
Safety Precautions

10 Room Air Conditioner
Dimensions
Dimensions
Installation plate
D
H
W
W mm 756 900 1,090
H mm 260 285 314
D mm 155 156 172
Model
Dimension
7K, 9K Btu Series 12K Btu Series 18K Btu Series
Indoor Unit
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that could cause harm to the
air conditioner.
This symbol indicates special notes.
NOTICE
Symbols Used in this Manual

Service Manual 11
WL2
L3
L1
D
H
L4
L5
Gas side
(3-way valve)
Liquid side
(2-way valve)
MODEL 7k, 9k Btu Series 12k Btu Series
DIM unit
W mm 575 717
H mm 525 498
D mm 260 229
L1 mm 301 270
L2 mm 73 56
L3 mm 392 464
L4 mm 35 17
L5 mm 100 130
Dimensions
Outdoor Unit
Dimensions

12 Room Air Conditioner
Outdoor Unit
MODEL
DIM
WL2
L3
L1
D
H
L4
L5
Gas side
(3-way valve)
Liquid side
(2-way valve)
W mm 840
H mm 577
D mm 276
L1 mm 337
L2 mm 64
L3 mm 611
L4 mm 16
L5 mm 156
18K But Series
Dimensions

Service Manual 13
Dimensions
Outdoor Unit
W
L7 L6 L8 L9
D
L1
L2
L3
L10L11
L4L5
H
Gas side
Liquid side
MODEL
DIM
Wmm 870
Hmm 655
Dmm 320
L1 mm 370
L2 mm 340
L3 mm 25
L4 mm 630
L5 mm 25
L6 mm 546
L7 mm 162
L8 mm 162
L9 mm 54
L10 mm 74.5
L11 mm 79
AS-H246TKA2

14 Room Air Conditioner
Model Name
Item Unit
Cooling Capacity Btu/h
Heating Capacity
Moisture Removal l/h
Power Source Ø,V,Hz
Air Circulation Indoor m3/min
Outdoor
Noise Level Indoor dB (A)±3
Outdoor
Input Cooling W
Heating
Running Cooling A
Current Heating
E.E.R. Cooling Btu/hW
C.O.P Heating
Motor Output Indoor W
Outdoor
Dimensions Indoor mm
(WxHxD) Outdoor
Net. Weight Indoor kg
Outdoor
Refrigerant (R410A) g
Airflow Direction Control (Up & Down)
Airflow Direction Control (Left & Right)
Chaos Wind
Timer
Self Diagnosis
Remocon Type
Service Valve Liquid inch(mm)
Gas
Sleeping Operation
Drain Hose
Connecting Cable
Power Cord
Product Specifications
Product Specifications
Table-1
7000 9000 12000 18500 23500
7300 9300 12500 19000 23500
11.21.22.22.9
1Ø,220-240V,50Hz 1Ø,220-240V,50Hz 1Ø,220-240V,50Hz 1Ø,220-240V,50Hz 1Ø,220-240V,50Hz
5.0/5.7 5.8/6.6 8.8/9.5 13.4 15.1
20 20 22 42 42
34 37 40 40 47
49 49 52 54 57
730 940 1250 1760 2290
730 970 1140 1900 2450
3.2 4.1 5.6 7.9 10.5
3.2 4.2 5.1 8.5 11.0
9.59 9.57 9.6 10.51 10.26
10.0 9.58 10.96 10.0 9.59
779.52222
18 18 - 72 82.9
756x260x155 756x260x155 900x285x156 1090x314x172 1090x314x172
575x525x260 575x525x260 717x498x229 870x577x276 870x577x276
777.21212
25 26 30 50 60
660g 710g 720g 1270g 1500g
OOO OO
--- --
OOO OO
7HrOFF 7HrOFF 7HrOFF 7HrOFF 7HrOFF
OOO OO
L.C.D wireless L.C.D wireless L.C.D wireless L.C.D Wireless L.C.D Wireless
1/4"(6.35) 1/4"(6.35) 1/4"(6.35) 1/4"(6.35) 3/8”(9.52)
3/8"(9.52) 3/8"(9.52) 1/2"(12.7) 5/8"(15.88) 5/8”(15.88)
--- --
OOO OO
1.0mm2x3,0.75mm
2x 2 1.0mm2x 3, 0.75mm2x2 1.0mm 2x3,0.75mm 2x 2 1.5mm2x3,0.75mm 2x 2 12.5mm2x3,0.75mm 2x2
1.0mm21.0mm21.0mm23x1.5mm
23x2.5mm 2
AS-H0766KA2 AS-H0966KA2 AS-H126RKA2 AS-H186TKA2 AS-H246TKA2

Service Manual 15
Product Specifications
Model Name
Item Unit
Cooling Capacity Btu/h
Heating Capacity
Moisture Removal l/h
Power Source Ø,V,Hz
Air Circulation Indoor m3/min
Outdoor
Noise Level Indoor dB (A)±3
Outdoor
Input Cooling W
Heating
Running Cooling A
Current Heating
E.E.R. Cooling Btu/hW
C.O.P Heating
Motor Output Indoor W
Outdoor
Dimensions Indoor mm
(W x H x D) Outdoor
Net. Weight Indoor kg
Outdoor
Refrigerant (R410A) g
Airflow Direction Control (Up & Down)
Airflow Direction Control (Left & Right)
Chaos Wind
Timer
Self Diagnosis
Remocon Type
Service Valve Liquid inch(mm)
Gas
Sleeping Operation
Drain Hose
Connecting Cable
Power Cord
Table-2
7000 9000 12000 12000 9000
7300 9000 13000 - -
1 1.2 1.2 1.2 1.2
1Ø,220-240V,50Hz 1Ø,220-240V,50Hz 1Ø,220-240V,50Hz 1Ø,220-240V,50Hz 1Ø,220-240V,50Hz
5.0/5.7 5.8/6.6 8.8/9.5 8.8/9.5 5.8/6.6
20 20 22 22 20
35 37 40 40 37
49 49 52 52 49
700 920 1310 1310 950
730 850 1250 - -
3.1 4.1 6.0 6.0 4.2
3.2 3.7 5.8 - -
10 9.78 9.16 9.16 9.47
2.93 3.1 3.05 - 3.1
779.59.57
18 18 - - 18
756x260x155 756x260x155 900x285x156 900x285x156 756x260x155
575x525x260 575x525x260 717x498x229 717x498x229 575x525x260
777.27.27
25 26 30 30 26
650g 690g 800g 670g 690g
OOOOO
-----
OOOOO
7HrOFF 7HrOFF 7HrOFF 7HrOFF 7HrOFF
OOOOO
L.C.D wireless L.C.D wireless L.C.D wireless L.C.D wireless L.C.D wireless
1/4"(6.35) 1/4"(6.35) 1/4"(6.35) 1/4"(6.35) 1/4"(6.35)
3/8"(9.52) 3/8"(9.52) 1/2"(12.7) 1/2"(12.7) 3/8"(9.52)
-----
OOOOO
1.0mm2x3,0.75mm
2x 2 1.0mm2x 3, 0.75mm2x 2 1.0mm2x 3, 0.75mm2x 2 1.0mm2x 3, 0.75mm2x2 1.0mm 2x3,0.75mm 2x2
1.0mm21.0mm21.0mm21.0mm21.0mm2
LS-H0766KA2 LS-H0966KA2 LS-H126RKA2 LS-C126RKA2 LS-C0966KA2

16 Room Air Conditioner
Installation
Installation
Indoor unit
•Do not have any heat or steam near the unit.
•Select a place where there are no obstacles in front of the
unit.
•Make sure that condensation drainage can be conveniently
routed away.
Do not install near a doorway.
•Ensure that the space around the left and right of the unit is
more than "A". The unit should be installed as high on the
wall as possible, allowing a minimum of "B" from ceiling.
•Use a stud finder to locate studs to prevent unnecessary
damage to the wall.
Outdoor unit
•If an awning is built over the unit to prevent direct sunlight
or rain exposure, make sure that heat radiation from the
condenser is not restricted.
•Ensure that the space around the back and sides is more
than 10cm. The front of the unit should have more than
70cm of space.
•Do not place animals and plants in the path of the warm air.
•Take the air conditioner weight into account and select a
place where noise and vibration are minimum.
•Select a place so that the warm air and noise from the air
conditioner do not disturb neighbors.
Rooftop Installations:
•If the outdoor unit is installed on a roof structure, be
sure to level the unit. Ensure the roof structure and
anchoring method are adequate for the unit location.
•Consult local codes regarding rooftop mounting.
More than "A"
More than "B"
More than 2.3m More than "B"
•Capacity is based on standard length and maxi-
mum allowance length is on the basis of reliability.
•Oil trap should be installed every 5~7 meters.
Grade Clearance(cm)
AB
5K~28K 10 5
30K~38K 30 12
Pipe Size
Capacit
y
(Btu/h) GAS LIQUID
Max.
Length
A(m)
Additional
Refrigerant
(g/m)
Max.
Elevation
B(m)
Standard
Length
(m)
5k~14k 3/8"(Ø9.52) 1/4"(Ø6.35) 4 or 7.5 7 15 20
1/2"(Ø12.7) 1/4"(Ø6.35) 4 or 7.5 7 15 20
1/2"(Ø12.7) 1/4"(Ø6.35) 4 or 7.5 15 30 20
18k~28k 5/8"(Ø15.88) 1/4"(Ø6.35) 4 or 7.5 15 30 20
5/8"(Ø15.88) 3/8"(Ø9.52) 4 or 7.5 15 30 30
30k~38k 5/8"(Ø15.88) 3/8"(Ø9.52) 7.5 15 30 30
3/4"(Ø19.05) 3/8"(Ø9.52) 7.5 15 30 50
If case more than 5m
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
A
Oil trap
Outdoor unit
Indoor unit
B
I
Selection of the Best Location
Piping Length and Elevation
Install the indoor unit on the wall where the height
from the floors more than 2.3 meters.
More than 10cm More than 10cm
More
than 60cm
More than 60cm
More than 70cm

Service Manual 17
Installation
The wall you select should be strong and solid
enough to prevent vibration
1. Mount the installation plate on the wall with four
type A screws. If mounting the unit on a concrete
wall, use anchor bolts.
•Mount the installation plate horizontally by aligning
the centerline using a level.
2. Measure the wall and mark the centerline. It is
also important to use caution concerning the
location of the installation plate-routing of the
wiring to power outlets is through the walls typi-
cally. Drilling the hole through the wall for pip-
ing connections must be done safely.
•Drill the piping hole with a ø70mm hole core drill.
Drill the piping hole at either the right or the left
with the hole slightly slanted to the outdoor side.
•Open the Front Grille.
•Pass Telephone Control Cord Wire through the hole
which the power cord goes through.
•Connect Telephone Control Cord Wire to the phone jack
of telephone PCB of Control Box.
•Fix Telephone Control Cord Wire inside Control box so
as not to disconnect.
•Close the Front Grille.
Installation Plate
Type "A" screw
5-7mm
(3/16"~5/16")
Indoor
WALL
Outdoor
Installation plate
Ø70mm
Left rear piping Right rear piping
C
D
B
AØ70mm
Ø70mm
Left rear piping Right rear piping
CE A
B
D
Installation plateInstallation plate
ABCD
S6 75 12 80 12
SR2 0 40 20 40
ST2 105 0 210 0
CHASSIS
(Grade)
Distance (mm)
How to Fix Installation Plate Drill a Hole in the Wall
ABC DE
SM 180 115 - 115 50
SN 180 115 195 115 -
CHASSIS
(Grade)
Distance (mm)
Drain hose junction
•Remove the rubber stopple in the desired drain direc-
tion.
•Insert drain hose into the handle of drain pan, and join
drain hose and connecting hose according to the figure
by.
Only the
desired direction
Connecting
part
Adhesive
Drain
hose

18 Room Air Conditioner
Flaring work and connection of piping
Flaring work and connection of piping
Flaring work
Flaring work
Main cause for refrigerant leakage is due to defect in the
flaring work. Carry out correct flaring work using the follow-
ing procedure.
Cut the pipes and the cable.
•Use the piping kit accessory or pipes purchased locally.
•Measure the distance between the indoor and the outdoor unit.
•Cut the pipes a little longer than the measured distance.
•Cut the cable 1.5m longer than the pipe length.
Check
•Compare the flared work with figure below.
•If flare is noted to be defective, cut off the flared sec-
tion and re-flare it.
•Preparing the indoor unit's piping and drain hose for instal-
lation through the wall.
•Remove the plastic tubing retainer(see illustration below)
and pull the tubing and drain hose away from chassis.
•Replace the plastic tubing holder in the original
position.(Optional)
•Carry out flaring work using flaring tool as shown below.
Burr removal
•Completely remove all burrs from the cut cross section of
pipe/tube.
•Put the end of the copper tube/pipe in a downward direc-
tion as you remove burrs in order to avoid dropping burrs
into the tubing.
Putting nut on
•Remove flare nuts attached to indoor and outdoor unit,
then put them on pipe/tube having completed burr removal.
(not possible to put them on after flaring work)
Flaring work
•Firmly hold copper pipe in a die in the dimension shown in
the table above.
Copper
pipe
90°Slanted Uneven Rough
Pipe
Reamer
Point down
Flare nut
Copper tube
Bar
Copper pipe
Clamp handle Red arrow mark
Cone
Yoke
Handle
Bar
"A"
mm inch mm
Ø6.35 1/4 0~0.5
Ø9.52 3/8 0~0.5
Ø12.7 1/2 0~0.5
Ø15.88 5/8 0~1.0
Ø19.05 3/4 1.0~1.3
Outside diameter A
Inclined
Inside is shiny without scratches
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
Connection of piping -- Indoor
Tubing holder
When install, make sure that the
remaining parts must be removed
clearlysoasnottodamagethepip-
ing and drain hose, especially power
cord and connecting cable.

Service Manual 19
Flaring work and connection of piping
Route the indoor tubing and the drain hose in the direction of
rear right.
Drain hose
Insert the connecting cable into the indoor unit from the out-
door unit through the piping hole.
•Do not connect the cable to the indoor unit.
•Make a small loop with the cable for easy connection later.
Tape the tubing, drain hose, and the connecting cable. Be
sure that the drain hose is located at the lowest side of the
bundle. Locating at the upper side can cause drain pan to
overflow inside the unit.
NOTE: If the drain hose is routed inside the room, insulate
the hose with an insulation material* so that dripping from
"sweating"(condensation) will not damage furniture or floors.
*Foamed polyethylene or equivalent is recommended.
Indoor unit installation
•Hook the indoor unit onto the upper portion of the installa-
tion plate.(Engage the two hooks of the rear top of the
indoor unit with the upper edge of the installation plate.)
Ensurethatthehooksareproperlyseatedontheinstalla-
tion plate by moving it left and right.
Press the lower left and right sides of the unit against the
installation plate until the hooks engage into their slots(click-
ing sound).
Connecting the pipings to the indoor unit and
drain hose to drain pipe.
•Align the center of the pipes and sufficiently tighten
the flare nut by hand.
•Tighten the flare nut with a wrench.
•When extending the drain hose at the indoor unit, install the
drain pipe.
Wrap the insulation material around the con-
necting portion.
•Overlap the connection pipe insulation material and the
indoor unit pipe insulation material. Bind them together with
vinyl tape so that there is no gap.
•Wrap the area which accommodates the rear piping hous-
ing section with vinyl tape.
Connecting
pipe
Connecting cable
Tape
Drain hose
Drain hose
Connecting
cable
Indoor unit tubing Flare nut Pipes
Wrench
Indoor unit tubing
Open-end wrench (fixed)
Connection pipe
Flare nut
mm inch kg.m
Ø6.35 1/4 1.8
Ø9.52 3/8 4.2
Ø12.7 1/2 5.5
Ø15.88 5/8 6.6
Ø19.05 3/4 6.6
Outside diameter Torque
Vinyl tape(narrow)
Adhesive
Drain pipe
Indoor unit drain hose
Plastic bands Insulation material
Vinyl tape(narrow)
Connection
pipe
Connecting cable
Vinyl tape
(wide) Wrap with vinyl tape
Indoor
unit pipe
Pipe
For right rear piping

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