LG TS-C096EMA0, TS-H096EMA0, TS-C126EMA0, TS-H126EMA0, TS-C096YDA0 Diagram

LG

Room Air Conditioner

SERVICE MANUAL

LG

MODELS: TS-C096EMA0

TS-H096EMA0
TS-C126EMA0
TS-H126EMA0
TS-C096YDA0
TS-H096YDA0
TS-C126TDA0
TS-H126TDA0

CAUTION

website http://www.lgservice.com

• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.

• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

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.............................................................................................................................................13

Product Specifications .................................................................................................................................14

Installation .....................................................................................................................................................18

Selection of the Best Location..................................................................................................................18

Piping Length and Elevation.....................................................................................................................18

How to Fix Installation Plate.....................................................................................................................19

Drill a Hole in the Wall..............................................................................................................................19

Drain hose junction...................................................................................................................................19

Flaring work and connection of piping.......................................................................................................20

Flaring work..............................................................................................................................................20

Connection of Piping Indoor.....................................................................................................................20

Connection of the Pipes-Outdoor.............................................................................................................24

Connecting the cable between indoor unit and outdoor unit...................................................................25

Connect the Cable to the Indoor Unit.......................................................................................................25

Connect the Cable to the Outdoor Unit ....................................................................................................26

Checking the drainage and forming the pipings........................................................................................27

Checking the Drainage.............................................................................................................................27

Form the Piping........................................................................................................................................27

AIR PURGING ................................................................................................................................................28

Air purging................................................................................................................................................28

Air purging with vacuum pump.................................................................................................................28

Test Running .................................................................................................................................................30

Operation .......................................................................................................................................................31

Function of Controls.................................................................................................................................31

Display Function ......................................................................................................................................35

Self-diagnosis Function............................................................................................................................35

Remote Control Operations......................................................................................................................36

Disassembly ..................................................................................................................................................37

Indoor Unit................................................................................................................................................37

Schematic Diagram.......................................................................................................................................40

Electric Control Device.............................................................................................................................40

Wiring Diagram.........................................................................................................................................41

Components Location ..............................................................................................................................44

Troubleshooting Guide.................................................................................................................................46

Refrigeration Cycle Diagram ....................................................................................................................46

2-way, 3-way Valve .................................................................................................................................47

Cycle Parts...............................................................................................................................................53

Electronic Parts........................................................................................................................................54

Exploded View...............................................................................................................................................61

Replacement Parts List ................................................................................................................................63

2 Room Air Conditioner

LG Model Name

12 - 345678910

Code Type Code of Model Meaning

1 Producing Center, A~Z L: Chang-won R22 N: India

Refrigerant A: Chang-won R410A Z: Brazil

C: Chang-won R407C D: Indonesia
T: China M: Mexico
K: Turkey R22 V: Vietnam
E: Turkey R410A S: Out Sourcing
H: Thailand

2 Product Type A~Z S: Split Type Air Conditioner

3 Cooling/Heating/Inverter A~Z C: Cooling only

H: Heat pump
X: C/O + E/Heater
Z: H/P + E/Heater

V: AC Inverter C/O
N: AC Inverter H/P
Q: DC Inverter C/O
W: DC Inverter H/P

4, 5 Capacity 0~9 Cooling/Heating Capacity

Ex. "09" → 9,000 Btu/h

6 Electric Range 1~9 1: 115V/60Hz, A: 220V, 50Hz, 3Phase

A~Z 2: 220V/60Hz B: 208~230V, 60Hz, 3Phase

3: 208-230V/60Hz C: 575V, 50Hz, 3Phase
5: 200-220V/50Hz D: 440~460, 60Hz, 3Phase
6: 220-240V/50Hz E: 265V, 60Hz
7: 110V, 50/60Hz F: 200V, 50/60Hz
8: 380-415V/50Hz
9: 380-415V/60Hz

7 Chassis A~Z Name of Chassis of Unit

Ex. LSP → SP Chassis

8 Look A~Z Look,

Color (Artcool Model)

9 Function A~Z

10 Serial No. 1~9 LG Model De

* ARTCOOL COLOR

velopment Serial No.

Basic A
Basic+4Way B
Plasma Filter C
Plasma Filter+4 Way D
Tele+LCD E
Tele+LCD+Nano plasma+4Way F
Nano Plasma F+(A/changeove)+A/clean+Low A G
Nano Plasma F+(A/changeove)+A/clean+4way+Low A H
Tele+LED+4way I
Internet J
Plasma F+4Way+Oxy generator K
Nano Plasma F+(A/changeove)+A/clean L
Nano Plasma F+(A/changeove)+A/clean+4way M
Nano Plasma F+(A/changeove)+A/clean+PTC N
Nano Plasma F+(A/changeove)+Autoclean+4way+PTC P
Nano Plasma F+(A/changeove)+A/clean+4way+Low A+PTC Q
Negative ION+A/Clean R
(Nano)Plasma+Negative ION+A/Clean S
4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean

T

Nano Plasma F+4Way+(A/changeove)+A/clean+ U

R Mirror
W White
B Blue
D Wood
M Metal
C Cherry

2003

Service Manual 3

2004~

12 - 345678910

Code Type Code of Model Meaning

1 Producing Center, A~Z

L Chang_won R22
A Chang_won R410A
C Chang_won R407C
T China
K Turkey R22
E Turkey R410A
H Thailand

N India
Z Brazil
D Indonesia
X Mexico
V Vietnam
S Out sourcing

Refrigerant

2 Product Type A~Z S: Split Type Air Conditioner

3 Cooling/Heating/Inverter A~Z C: Cooling only

H: Heat pump
X: C/O + E/Heater
Z: H/P + E/Heater

V: AC Inverter C/O
N: AC Inverter H/P
Q: DC Inverter C/O
W: DC Inverter H/P

4, 5 Capacity 0~9 Cooling/Heating Capacity

Ex. "09" → 9,000 Btu/h

6 Electric Range 1~9 1: 115V/60Hz, A: 220V, 50Hz, 3Phase

A~Z 2: 220V/60Hz B: 208~230V, 60Hz, 3Phase

3: 208-230V/60Hz C: 575V, 50Hz, 3Phase
5: 200-220V/50Hz D: 440~460, 60Hz, 3Phase
6: 220-240V/50Hz E: 265V, 60Hz
7: 110V, 50/60Hz F: 200V

CHASSIS Look

D
K

L
G
M
N
D
P

Division
Panel Type(Deluxe)
Fighting 'Look'

(LG1)
(LG2)-SEMI PANEL
OEM1
OEM2
Panel Type(Deluxe)
LG3

, 50/60Hz
8: 380-415V/50Hz
9: 380-415V/60Hz

7 Chassis A~Z Name of Chassis of Unit

Ex. LSP → SP Chassis

8 Look A~Z Look,

Color (Artcool Model)

9 Function A~Z

10 Serial No. 1~9 LG Model De

* ARTCOOL COLOR

velopment Serial No.

R Mirror
W White
B Blue
D Wood
M Metal
C Cherry

S4/S5

S6
SQ
SR

ST

Basic A
Basic+4Way B
Plasma Filter C
Plasma Filter+4 Way D
Tele+LCD E
Tele+LCD+Nano plasma+4Way F
NBF F+(A/changeove)+A/clean+Low A G
NBF F+(A/changeove)+A/clean+4way+Low A H
Tele+LED+4way I
Internet J
Plasma F+4Way+Oxy generator K
NBF F+(A/changeove)+A/clean L
NBF F+(A/changeove)+A/clean+4way M
NBF F+(A/changeove)+A/clean+PTC N
NBF F+(A/changeove)+Autoclean+4way+PTC P
NBF F+(A/changeove)+A/clean+4way+Low A+PTC Q
(Nano)Plasma+ION+A/Clean S
4way+(Nano)Plasma F+

Negative ION+Healthy dehumidification

+A/Clean T
Nano Plasma F+4Way+(A/changeove)+A/clean+Oxy generator U
4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean+Oxy generator

V
Dry contact W
Wire remocon 8

4 Room Air Conditioner

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.

• There is risk of fire of electric shock. • There is risk of electric shock.

Install the panel and the cover of control box
securely.

• There is risk of fire of electric shock. • No grounding may cause electric shock.

Always use the power plug and socket with the
ground terminal.

.Do not modify or extend the power cord.

Service Manual 5

Safety Precautions

For re-installation of the installed product,
always contact a dealer or an authorized ser­vice center.

• There is risk of fire, electric shock, explosion, or

injury.

Be cautious when unpacking and installing the
product.

• Sharp edges could cause injury. Be especially care-

ful of the case edges and the fins on the condenser
and evaporator.

Do not install, remove, or re-install the unit by
yourself.

• There is risk of fire, electric shock, explosion, or
injury.

For installation, always contact the dealer or
an Authorized service center

•

There is risk of fire, electric shock, explosion, or injury.

Do not install the product on a defective instal­lation stand.

• It may cause injury, accident, or damage to the
product.

6 Room Air Conditioner

Be sure the installation area does not
deteriorate with age.

• If the base collapses, the air conditioner could fall
with it, causing property damage, product failure,
and personal injury.

■ Operation

Wax

Thinner

Safety Precautions

Do not turn the air-conditioner ON or OFF by

Use a dedicated outlet for this appliance.

plugging or unplugging the power plug.

• 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.

• There is risk of fire or electrical shock. • There is risk of fire and electric shock.

Do not place a heater or other appliances near
the power cable.

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.

Service Manual 7

90˚

Safety Precautions

Unplug the unit if strange sounds, odors, or
smoke comes from it.

• There is risk of electric shock or fire. • There is risk of fire, electric shock, or product dam-

Be cautious that water could not enter the
product.

age.

■ Installation

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.

8 Room Air Conditioner

■ Operation

Wax

Safety Precautions

Use a soft cloth to clean. Do not use harsh
detergents, solvents, etc.

• There is risk of fire, electric shock, or damage to the

plastic parts of the product.

Do not step on or put anyting on the product.
(outdoor units)

Do not touch the metal parts of the product
when removing the air filter. They are very
sharp!

• There is risk of personal injury.

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

Dimensions

Installation plate

D

H

W

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.

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.

Dimensions

Symbols Used in this Manual

NOTICE

Model

Dimension

W mm 915

H mm 171
D mm 282

10 Room Air Conditioner

SE Chassis

Dimensions

Installation plate

D

H

W

Model

Dimension

W mm 840

H mm 270
D mm 161

SY Chassis

Service Manual 11

Dimensions

Installation plate

D

H

W

Dimensions

Model

Dimension

W mm 895

H mm 282
D mm 166

ST Chassis

Service Manual 12

MODEL

DIM unit

W mm

H mm

D mm

Dimensions

Service Manual 13

Outdoor Unit

D

W

H

TS-C096EMA0
TS-C096YDA0

575

520

Gas side

(3-way valve)

Liquid side

(2-way valve)

TS-H096EMA0 TS-H096YDA0

0

TS-C126EMA0 TS-C126TDA0

TS-H126EMA0 TS-H126TDA0

770

540

260

245

Models TS-C096EMA0 TS-H096EMA0

Product Specifications

Service Manual 14

Cooling Capacity

Heating Capacity -

Power Input Cooling 930 950

Heating - 940

Running Current Cooling 4.5 4.5

Heating - 4.5

Starting Current Cooling 6 6

Heating - 6

EER 2.44(2.84) 2.39(2.78)

COP - 2.8
Power Supply 1Φ,220-240,50 1Φ,220-240,50
Air Circulation Indoor,Max

Outdoor,Max 1680 1680

Moisture Removal
Features Temperature Control

Plasma Filter - ­Nano Plasma Filter - ­Deodorizing Filter Optional Optional

CHAOS Wind(Auto Wind)
Airflow Direction(4-Way:Optional)
Steps, Fan/Cool 3/4 3/4
Airflow Direction Contorl(up&down)
Airflow Direction Contorl(left&right)
Remocon Type Wireless Simple Wireless Simple
Setting Temperature Range Cool

Temperature Increment
Self Diagnosis
Timer
Sleep Operation
Soft Dry Operation
Restart Delay(minute) 3 3

Special Function
Refrigerant(R22)Charge 490g 780g
Blower Motor Input 29 29

Output 11 11

Motor Input 52 66.6

Motor Output 36 27

Circuit Breaker A

Power Cord 3*0.75 3*0.75

Connecting Cable 3*0.75 3*0.75

Connecting Tube Liquid Side 6.35(1/4) 6.35(1/4)

(φ. Socket Flare) Gas Side 9.52(3/8) 9.52(3/8)

Length,std 5 5

Drain Hose (O.D , I.D) 21.5,16(0.85,0.63) 21.5,16(0.85,0.63)

Dimension Indoor 171*915*282 171*915*282

Outdoor520*575*260 540*770*245

Net Weight Indoor

Outdoor 33 25

Unit

kcal/h.(W)

Btu/h.

kcal/h.(W)

Btu/h.

W
W

A
A
A
A

kcal/h.W(W/W)

Btu/h.W

W/W

Φ,V,Hz

㎥/min(CFM)
㎥/min(CFM)

ℓ/h.(pts/h.)

g
W

W

W

W

AWG#:P*㎟

AWG#:P*㎟

mm(in)

mm(in)

m(in)

mm(in)

mm

mm

kg

kg

Heat

2268(2637) 2268(2637)

9,000 9,000

- 9,000

9.68 9.47

430 430

0.95 0.95

Thermistor Thermistor

Yes Yes

4-Way 4-Way

Auto Auto

Manual Manual

18 - 30 18 - 30

- 16 - 30

11

Yes Yes

24h, Off 24h, Off

Yes Yes
Yes Yes

--

--

10 9

2268(2637)

Models TS-C126EMA0 TS-H126EMA0

Product Specifications

Service Manual 15

Cooling Capacity

Heating Capacity

Power Input Cooling 1290 1280

Heating - 1280

Running Current Cooling 6.3 6.1

Heating - -

Starting Current Cooling 10.1 9.6

Heating 7.35 7.7

EER 2.35(2.73) 2.36(2.75)

COP - 2.8
Power Supply 1Φ,220-240,50 1Φ,220-240,50
Air Circulation Indoor,Max

Outdoor,Max 1680 1680

Moisture Removal
Features Temperature Control

Plasma Filter - ­Nano Plasma Filter - ­Deodorizing Filter Optional Optional

CHAOS Wind(Auto Wind)
Airflow Direction(4-Way:Optional)
Steps, Fan/Cool 3/4 3/4
Airflow Direction Contorl(up&down)
Airflow Direction Contorl(left&right)
Remocon Type Wireless Simple Wireless Simple
Setting Temperature Range Cool

Temperature Increment
Self Diagnosis
Timer
Sleep Operation
Soft Dry Operation
Restart Delay(minute) 3 3

Special Function
Refrigerant(R22)Charge 680g 930g
Blower Motor Input 29 29

Output 11 11

Motor Input 66.6 109

Motor Output 27 42

Circuit Breaker A

Power Cord 3*1.0 3*1.0

Connecting Cable 3*1.0 3*1.0

Connecting Tube Liquid Side 6.35(1/4) 6.35(1/4)

(φ. Socket Flare) Gas Side 12.7(1/2) 12.7(1/2)

Length,std 5 5

Drain Hose (O.D , I.D) 21.5,16(0.85,0.63) 21.5,16(0.85,0.63)

Dimension Indoor 171*915*282 171*915*282

Outdoor 245*540*770 245*540*770

Net Weight Indoor

Outdoor 33 33

Unit

kcal/h.(W)

Btu/h.

kcal/h.(W)

Btu/h.

W
W

A

A

A

A

kcal/h.W(W/W)

Btu/h.W

W/W

Φ,V,Hz

㎥/min(CFM)
㎥/min(CFM)

ℓ/h.(pts/h.)

g
W

W

W

W

AWG#:P*㎟

AWG#:P*㎟

mm(in)

mm(in)

m(in)

mm(in)

mm

mm

kg

kg

Heat

3024(3516) 3024(3516)

12,000 12,000

- 3024(3516)

- 12,000

9.30 9.38

550 550

1.5 1.5

Thermistor Thermistor

Yes Yes

4-Way 4-Way

Auto Auto

Manual Manual

18 - 30 18 - 30

- 16 - 30

11

Yes Yes

24h, Off 24h, Off

Yes Yes
Yes Yes

--

--

10 10

Models TS-C096YDA0 TS-H096YDA0

x

y

y

&

&

R

,

u

Product Specifications

Service Manual 16

Cooling Capacity

Heating Capacity -

Power Input Cooling 900 900

Heating - 900

Running Current Cooling 4.4 4.4

Heating --

Starting Current Cooling 6 6

Heating - -

EER 2.52(2.93) 2.52(2.93)

COP - 2.9
Power Supply 1Φ,220-240,50 1Φ,220-240,50
Air Circulation Indoor,Max

Outdoor,Ma

Moisture Removal
Features Temperature Control

Plasma Filter - ­Nano Plasma Filter - -

Deodorizing Filter Optional Optional

CHAOS Wind(Auto Wind)
Airflow Direction(4-Way:Opti
Steps, Fan/Cool 3/4 3/4
Airflow Direction Contorl(up
Airflow Direction Contorl(left
Remocon Type Wireless Simple Wireless Simple
Setting Temperature

Temperature Increment
Self Diagnosis
Timer
Sleep Operation
Soft Dry Operation
Restart Delay(minute) 3 3

Special Function

Refrigerant(R22)Charge 430g 630g

Blower Motor Input 29 29

Output 11 11
Motor Input 52 66.6
Motor Outp

Circuit Breaker A

Power Cord 3*0.75 3*0.75
Connecting Cable 3*0.75 3*0.75

Connecting Tube Liquid Side 6.35(1/4) 6.35(1/4)
(φ. Socket Flare) Gas Side 9.52(3/8) 9.52(3/8)

Length,std 5 5

Drain Hose (O.D , I.D) 21.5,16(0.85,0.63) 21.5,16(0.85,0.63)

Dimension Indoor 161*270*840 161*270*840

Outdoor 520

Net Weight Indoor

Outdoor 22 33

Unit

kcal/h.(W)

Btu/h.

kcal/h.(W)

Btu/h.

W
W

A
A
A
A

kcal/h.W(W/W)

Btu/h.W

W/W

Φ,V,Hz
㎥/min(CFM)
㎥/min(CFM)

ℓ/h.(pts/h.)

Cool
Heat

g
W
W
W
W

AWG#:P*㎟
AWG#:P*㎟

mm(in)
mm(in)

m(in)

mm(in)

mm
mm

kg
kg

2268(2637) 2268(2637)

9,000 9,000

- 9,000

10.00 10.00

450 450

1560 1560

1.1 1.1

Thermistor Thermistor

Yes Yes

4-Wa

Auto Auto

Manual Manual

18 - 30 18 - 30

- 16 - 30
11

Yes Yes

7h

Off 7h, Off

Yes Yes

Yes Yes

--

36 27

--

*575*260 540*770*245

77

2268(2637)

4-Wa

Models TS-C126TDA0 TS-H126TDA0

x

y

y

&

&

R

,

u

Product Specifications

Service Manual 17

Cooling Capacity

Heating Capacity

Power Input Cooling 1260 1180

Heating - 1350

Running Current Cooling 6 5.6

Heating - 6.1

Starting Current Cooling 10.7 9

Heating - 8

EER 2.4(2.79) 2.56(2.98)

COP - 2.6

Power Supply 1Φ,220-240,50 1Φ,220-240,50
Air Circulation Indoor,Max

Outdoor,Ma

Moisture Removal
Features Temperature Control

Plasma Filter - ­Nano Plasma Filter - -

Deodorizing Filter Optional Optional

CHAOS Wind(Auto Wind)
Airflow Direction(4-Way:Opti
Steps, Fan/Cool 3/4 3/4
Airflow Direction Contorl(up
Airflow Direction Contorl(left
Remocon Type Wireless Simple Wireless Simple
Setting Temperature

Temperature Increment
Self Diagnosis
Timer
Sleep Operation
Soft Dry Operation
Restart Delay(minute) 3 3

Special Function

Refrigerant(R22)Charge 770g 860g

Blower Motor Input 42 42

Output 11 11
Motor Input 109 109
Motor Outp

Circuit Breaker A

Power Cord 3*1.0 3*1.0
Connecting Cable 3*1.0 3*1.0

Connecting Tube Liquid Side 6.35(1/4) 6.35(1/4)

(φ. Socket Flare) Gas Side 12.7(1/2) 12.7(1/2)

Length,std 5 5

Drain Hose (O.D , I.D) 21.5,16(0.85,0.63) 21.5,16(0.85,0.63)

Dimension Indoor 166*282*895 166*282*895

Outdoor 245*540*770 245*540*770

Net Weight Indoor

Outdoor 33 33

Unit

kcal/h.(W)

Btu/h.

kcal/h.(W)

Btu/h.

W
W

A

A

A

A

kcal/h.W(W/W)

Btu/h.W

W/W

Φ,V,Hz
㎥/min(CFM)
㎥/min(CFM)

ℓ/h.(pts/h.)

Cool
Heat

g
W
W
W
W

AWG#:P*㎟
AWG#:P*㎟

mm(in)
mm(in)

m(in)

mm(in)

mm
mm

kg
kg

3024(3516) 3024(3516)

12,000 12,000

-

- 12,000

9.52 10.17

450 450

1680 1680

1.5 1.5

Thermistor Thermistor

Yes Yes

4-Wa

Auto Auto

Manual Manual

18 - 30 18 - 30

- 16 - 30
11

Yes Yes

7h

Off 7h, Off

Yes Yes

Yes Yes

--

42 42

--

88

3024(3516)

4-Wa

Installation

More than 10cm

More than

5cm

More than 2.3m

More than

5cm

Outdoor unit

Indoor unit

A

B

Outdoor unit

Indoor unit

A

B

A

Oil trap

Outdoor unit

Indoor unit

B

I

More than 10cm More than 10cm

More
than 60cm

More than 60cm

More than 70cm

Installation

Selection of the Best Location

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.

Install the indoor unit on the wall where the height
from the floors more than 2.3 meters.

Grade

5K~28K 10 5

30K~38K 30 12

Clearance(cm)

AB

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.

Piping Length and Elevation

Max.

(m)

Max.

Elevation

B (m)

Capacity

(Btu/h)

5k~14k

18k~28k 5/8"(Ø15.88) 1/4"(Ø6.35) 4 or 7.5 15 30 20

30k~38k

Pipe Size

GAS LIQUID

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

5/8"(Ø15.88) 3/8"(Ø9.52) 4 or 7.5 15 30 30

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

Standard

Length

Length

A (m)

Additional

Refrigerant

(g/m)

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.

18 Room Air Conditioner

If case more than 5m

• 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.

How to Fix Installation Plate Drill a Hole in the Wall

Installation Plate

Type "A" screw

Chassis

Hook

5-7mm

(3/16"~5/16")

Indoor

WALL

Outdoor

Installation plate

Left rear piping Right rear piping

Ø70mm

Ø70mm

DB

A

C

Connecting

part

Adhesive

Drain
hose

Only the
desired direction

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 typi­cally. Drilling the hole through the wall for pip­ing 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.

CHASSIS

(Grade)

7k, 9k, 12k 75 65 105 65

18k, 24k 105 65 260 65

ABCD

Distance (mm)

Drain hose junction

• Remove the rubber stopple in the desired drain direc­tion.

• Insert drain hose into the handle of drain pan, and join
drain hose and connecting hose according to the figure
by.

Service Manual 19

Flaring work and connection of piping

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

Inclined

Inside is shiny without scratches

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

Drain hose

Pipe

Reamer

Point down

Flare nut

Copper tube

Flaring work and connection of piping

Flaring work

• Carry out flaring work using flaring tool as shown below.

Flaring work

Main cause for refrigerant leakage is due to defect in the
flaring work. Carry out correct flaring work using the follow­ing 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.

Copper

pipe

Slanted Uneven Rough

90°

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.

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 direc­tion as you remove burrs in order to avoid dropping burrs
into the tubing.

Outside diameter 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

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.

20 Room Air Conditioner

Connection of piping -- Indoor

• Preparing the indoor unit's piping and drain hose for instal­lation 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)

When install, make sure that the
remaining parts must be removed
clearly so as not to damage the pip­ing and drain hose, especially power
cord and connecting cable.

Flaring work and connection of piping

Drain hose

Connecting

cable

Vinyl tape(narrow)

Connection
pipe

Connecting cable

Vinyl tape
(wide)

Wrap with vinyl tape

Indoor
unit pipe

Pipe

Plastic bands

Insulation material

Vinyl tape(narrow)

Adhesive

Drain pipe

Indoor unit drain hose

Wrench

Indoor unit tubing

Open-end wrench (fixed)

Connection pipe

Flare nut

Indoor unit tubing Flare nut Pipes

Drain hose

Connecting
pipe

Connecting cable

Tape

Drain hose

For right rear piping

Route the indoor tubing and the drain hose in the direction of
rear right.

Insert the connecting cable into the indoor unit from the out­door 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.

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.

Outside diameter Torque

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

• When extending the drain hose at the indoor unit, install the

drain pipe.

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 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.

Press the lower left and right sides of the unit against the
installation plate until the hooks engage into their slots(click­ing sound).

Wrap the insulation material around the con­necting 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.

Service Manual 21

Flaring work and connection of piping

Drain pipe

Connecting cable

Wrap with vinyl tape

Drain hose

Pipe

Vinyl tape(wide)

Indoor unit tubing Flare nut Pipes

Installation plate

Spacer

Indoor unit

8cm

Plastic bands

Insulation material

Vinyl tape

Adhesive

Drain hose

Indoor unit drain hose

(narrow)

Wrench

Indoor unit tubing

Connection pipe

Flare nut

Open-end wrench (fixed)

• 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.

For left rear piping

Route the indoor tubing and the drain hose to
the required piping hole position.

Insert the piping, drain hose, and the connect­ing cable into the piping hole.

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.

Outside diameter Torque

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

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.

Tape the drain hose and the connecting cable.

• Connecting cable

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.

• When extending the drain hose at the indoor unit, install the
drain pipe.

Wrap the insulation material around the con­necting 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.

22 Room Air Conditioner

Flaring work and connection of piping

Vinyl tape(narrow)

Connection
pipe

Connecting cable

Indoor
unit piping

Pipe

Vinyl tape
(wide)

Wrap with vinyl tape

Drain hose

Vinyl tape(narrow)

Pipe

Wrap with
vinyl tape(wide)

Piping for
passage through
piping hole

Tubing holder

Drain hose

Connecting

cable

• Wrap the area which accommodates the rear piping hous­ing section with vinyl tape.

• Bundle the piping and drain hose together by wrapping
them with cloth tape over the range within which they fit
into the rear piping housing section.

Indoor unit installation

• Remove the spacer.

• Ensure that the hooks are properly seated on the installa-

tion plate by moving it left and right.

Press the lower left and right sides of the unit against the
installation plate until the hooks engage into their
slots(clicking sound).

Installation Information (For left piping)

• Good case
For left piping. Follow the instruction below.

• Press on the upper side of clamp. ( )

Reroute the pipings and the drain hose across
the back of the chassis.

Set the pipings and the drain hose to the back
of the chassis with the tubing holder.

• Hook the edge of tubing holder to tap on chassis and push
the bottom of tubing holder to be engaged at the bottom of
chassis.

• Unfold the tubing to downward slowly. ( )

• Bend the tubing to the left side of chassis.

Service Manual 23

Flaring work and connection of piping

Outdoor unit

Gas side piping
(Bigger diameter)

Liquid side
piping
(Smaller
diameter)

Torque wrench

Connection of the pipes-Outdoor

• Bad case

• Following bending type from right to left could cause

problem of pipe damage.

Align the center of the pipings and sufficiently
tighten the flare nut by hand.

Finally, tighten the flare nut with torque wrench
until the wrench clicks.

• When tightening the flare nut with torque wrench, ensure
the direction for tightening follows the arrow on the wrench.

Outside diameter Torque

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

24 Room Air Conditioner

Air

Conditioner

Main power source

NORMAL
CROSS-SECTIONAL
AREA 0.75mm

2

The power connecting cable connected to
the indoor and outdoor unit should be
complied with the following specifications
(Type "B" approved by HAR or SAA).

The power cord connected to the "A" unit
should be complied with the following
specifications(Type "B" approved by HAR or
SAA).

Connecting the cable between indoor unit and outdoor unit

Connect the cable to the Indoor unit.

• Connect the cable to the indoor unit by connecting the wires to the terminals on the control board individually according to
the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and the terminal No. are the same as
those of the indoor unit.). The earth wire should be longer than the common wires.
The above circuit diagram is subject to change without notice.
When installing, refer to the circuit diagram on the control box
inside Indoor Uint.

• When installing, refer to the circuit diagram on the
Control Box of Indoor Unit.

• When installing, refer to the wiring diagram on the
Control Cover Inside Outdoor Unit.

• The above circuit diagram is subject to change without
notice.

• Be sure to connect wires according to the wiring diagram.

• Connect the wires firmly, so that not to be pulled out easily.

• Connect the wires according to color codes by referring the

wiring diagram.

Connecting the cable between indoor unit and outdoor unit

(mm2)

NORMAL CROSS

-SECTIONAL AREA

Unit(A) Indoor Indoor Indoor Indoor Outdoor Outdoor

Cable Type(B) H05VV-F H05VV-F H05VV-F H05VV-F H05RN-F H05RN-F

5k~9k 12k 14K~18k 24k~28k 30k, 32k 36k, 38k

1.0 1.0 1.5 2.5 2.5 5.5

Grade

• If a power plug is not to be used, provide a circuit

breaker between power source and the unit as
shown below.

Circuit Breaker

Use a circuit
breaker or time
delay fuse.

(mm2)

NORMAL

CROSS

-SECTIONAL
AREA

Cable Type(B) H07RN-F H07RN-F H07RN-F

Grade

5k~12k 14k~18k 24k~28k

1.0 1.5 2.5

Service Manual 25

Connecting the cable between indoor unit and outdoor unit

Terminal block

Over 5mm

Cover control

Connecting cable

Connecting cable

Connect the cable to the outdoor unit

Remove the control cover from the unit by
loosening the screw.

Connect the wires to the terminals on the con­trol board individually.

Secure the cable onto the control board with
the cord clamp.

Refix the control cover to the original position
with the screw.

Use a recognized circuit breaker "A"
between the power source and the unit.
A disconnecting device to adequately discon­nect all supply lines must be fitted.

Circuit

Breaker

(A)

5k~14k 18k 24k~28k 30k, 32k 36k, 38k

15 20 30 30 40

Grade

Outdoor Unit

After the confirmation of the above conditions, prepare the wiring as follows:

1) Never fail to have an individual power circuit specifically for the air conditioner. As for the method of wiring,
be guided by the circuit diagram posted on the inside of control cover.

2) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations
to which the unit is subjected during the course of transportation. Check them and make sure that they are
all tightly fastened. (If they are loose, it could cause burn-out of the wires.)

3) Specification of power source.

4) Confirm that electrical capacity is sufficient.

5) See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the
name plate.

6) Confirm that the cable thickness is as specified in the power source specification.
(Particularly note the relation between cable length and thickness. (Refer to page 26))

7) Always install an earth leakage circuit breaker in a wet or moist area.

8) The following would be caused by voltage drop.

• Vibration of a magnetic switch, which will damage the contact point, fuse breaking, disturbance of the normal func-

tion of the overload.

9) The means for disconnection from a power supply shall be incorporated in the fixed wiring and have an air
gap contact separation of at least 3mm in each active(phase) conductors.

26 Room Air Conditioner

Checking the drainage and forming the pipings

Pull the right and
the left side.

Downward slope

Do not raise

Accumulated
drain water

Tip of drain hose
dipped in water

Air

Waving

Water
leakage

Water
leakage

Ditch

Less than
50mm gap

Water
leakage

Taping

Drain
hose

Pipings

Connecting
cable

Trap is required to prevent water
from entering into electrical parts.

Seal small openings
around pipings with a
gum type sealer.

Seal a small opening
around the pipings
with gum type sealer.

Trap

Trap

Checking the drainage and forming the pipings

Checking the drainage Form the piping

To remove the front panel from the indoor unit.

• Set the air direction louvers up-and-down to the
position(horizontally) by hand.

• Remove the securing screws that retain the front panel.
Pull the lower left and right sides of the grille toward you
and lift it off.

To check the drainage.

• Pour a glass of water on the evaporator.

• Ensure the water flows through the drain hose of the indoor

unit without any leakage and goes out the drain exit.

Form the piping by wrapping the connecting
portion of the indoor unit with insulation mate­rial and secure it with two kinds of vinyl tapes.

• 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.

In cases where the outdoor unit is installed
below the indoor unit perform the following.

• Tape the piping, drain hose and connecting cable from
down to up.

• Secure the tapped piping along the exterior wall using sad­dle or equivalent.

Drain piping

• The drain hose should point downward for easy drain flow.

• Do not make drain piping.

In cases where the Outdoor unit is installed
above the Indoor unit perform the following.

• Tape the piping and connecting cable from down to up.

• Secure the taped piping along the exterior wall. Form a trap

to prevent water entering the room.

• Fix the piping onto the wall by saddle or equivalent.

Service Manual 27

Air purgingd

Lo Hi

Indoor unit

Outdoor unit

Manifold valve

Charge hose

Nitrogen gas
cylinder(in vertical
standing position)

Pressure
gauge

AIR PURGING

Air purging

Air and moisture remaining in the refrigerant system have
undesirable effects as indicated below.

• Pressure in the system rises.

• Operating current rises.

• Cooling(or heating) efficiency drops.

• Moisture in the refrigerant circuit may freeze and block cap-

illary tubing.

• Water may lead to corrosion of parts in the refrigeration
system.

Therefore, the indoor unit and tubing between the indoor and
outdoor unit must be leak tested and evacuated to remove
any noncondensables and moisture from the system.

Air purging with vacuum pump

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.

Leak test

• 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.

• After the system is found to be free of leaks, relieve the
nitrogen pressure by loosening the charge hose connector
at the nitrogen cylinder. When the system pressure is
reduced to normal, disconnect the hose from the cylinder.

• Connect the manifold valve(with pressure gauges) and dry
nitrogen gas cylinder to this service port with charge hoses.

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.

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.

28 Room Air Conditioner

Soap water method

Gas side

Liquid side

Cap

Hexagonal wrench

2-way valve

(Open)

3-way valve

(Close)

Indoor unit

Outdoor unit

Lo Hi

Manifold valve

Vacuum pump

Pressure
gauge

Open

Close

(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 counter-

clockwise 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.

(5) If bubbles come out, the pipes have leakage.

Evacuation

• Connect the charge hose end described in the preceding
steps to the vacuum pump to evacuate the tubing and
indoor unit.
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.

Air purgingd

Required time for evacuation when 30 gal/h vacuum

If tubing length is less than 10m (33 ft)

pump is used

if tubing length is longer than 10m (33 ft)

10 min. or more 15 min. or more

• When the desired vacuum is reached, close the "Lo" knob
of the manifold valve and stop the vacuum pump.

Finishing the job

• With a service valve wrench, turn the valve stem of liquid
side valve counter-clockwise to fully open the valve.

• Turn the valve stem of gas side valve counter-clockwise to
fully open the valve.

• Loosen the charge hose connected to the gas side service
port slightly to release the pressure, then remove the hose.

• Replace the flare nut and its bonnet on the gas side service
port and fasten the flare nut securely with an adjustable
wrench. This process is very important to prevent leakage
from the system.

• Replace the valve caps at both gas and liquid side service
valves and fasten them tight.

This completes air purging with a vacuum pump.
The air conditioner is now ready to test run.

Service Manual 29

Test running

Bolt

Tubing connection

Discharge
temperature

Discharge air

Intake temperature

Power
button

TEST RUNNING

1. Check that all tubing and wiring have been properly con-

NOTE: If the actual pressure is higher than shown, the system is

nected.

2. Check that the gas and liquid side service valves are fully

open.

Settlement of outdoor unit

The air conditioner is now ready for use.

• Anchor the outdoor unit with a bolt and nut(ø10mm) tightly
and horizontally on a concrete or rigid mount.

• 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.

• In the case when the vibration of the unit is conveyed to the
hose, secure the unit with an anti-vibration bushing.

1. Connect a low-pressure gauge manifold hose to the

2. Open the gas side service valve halfway and purge the air

3. Close the liquid side service valve(all the way in).

4. Turn on the unit's operating switch and start the cooling

Evaluation of the performance

5. When the low-pressure gauge reading becomes 1 to

Operate unit for 15~20 minutes, then check the system
refrigerant charge:

1. Measure the pressure of the gas side service valve.

2. Measure the temperature of the intake and discharge of air.

3. Ensure the difference between the intake temperature and

the discharge is more than 8°C(46°F) (Cooling) or

Power-Failure Compensation Function User Selection ON/OFF

1) Operation Sequence

(Heating).

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 to be relocated or
the refrigerant circuit is serviced.

Pump Down means collecting all refrigerant in the outdoor
unit without loss in refrigerant gas.

CAUTION:

Be sure to perform Pump Down procedure with the unit
cooling mode.

Pump Down Procedure

charge port on the gas side service valve.

from the manifold hose using the refrigerant gas.

operation.

0.5kg/cm2 G(14.2 to 7.1 P.S.I.G.), fully close the gas side
valve stem and then quickly turn off the unit. At that time,
Pump Down has been completed and all refrigerant gas
will have been collected in the outdoor unit.

Press the forced switch until BUZZER sounds 2 times
(beep~beep~).

Release the forced switch if BUZZER sounds.

4. For reference; the gas side pressure of optimum condition

is as below.(Cooling)

Refrigerant

Outside ambient

TEMP.

The pressure of the gas side

service valve.

R-22 35°C (95°F) 4~5kg/cm2G(56.8~71.0 P.S.I.G.)

R-410A 35°C (95°F) 8.5~9.5kg/cm2G(120~135 P.S.I.G.)

30 Room Air Conditioner

Check the function selection ON/OFF with the operation LED.

2) Checking function-selection ON/OFF

- Function-Selection ON: One time blinking of operation LED

would repeat 4 times.

- Function-Selection OFF: Two times blinking of operation LED

would repeat 4 times.

Operation

Function of Controls

• DISPLAY

1) C/O Model

Operation Indicator

• ON while in appliance operation, OFF while in appliance pause.

• Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on)

Timer Indicator

• ON while in timer mode (on/off), OFF when timer mode is completed or canceled.

Comp. Running Incidator

• While in appliance operation, ON while in outdoor unit compressor running, OFF while in compressor off.

2) H/P Model

Operation Indicator

• ON while in appliance operation, OFF while in appliance pause.

• Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on)

Operation

Timer Indicator

• ON while in timer mode (on/off), OFF when timer mode is completed or canceled.

Defrost Indicator

• OFF except when hot start during heating mode operation or while in defrost control.

■ Cooling Mode Operation

• When the intake air temperature reaches 0.5°C below the setting temp, the compressor and the outdoor fan
stop.

• When it reaches 0.5°C above the setting temp, they start to operate again.

Compressor ON Temp ➲ Setting Temp+0.5°C
Compressor OFF Temp ➲ Setting Temp-0.5°C

• While in compressor running, operating with the airflow speed set by the remote control. While in compressor
not running, operating with the low airflow speed regardless of the setting.

■ Healthy Dehumidification Mode

• When the dehumidification operation input by the remote control is received, the intake air temperature is
detected and the setting temp is automatically set according to the intake air temperature.

26°C ≤ Intake Air Temp ➲ 25°C
24°C ≤ Intake Air Temp<26°C ➲ Intake Air Temp-1°C
18°C ≤ Intake Air Temp<24°C ➲ Intake Air Temp-0.5°C
Intake Air Temp<18°C ➲ 18°C

Service Manual 31

Operation

• While in compressor off, the indoor fan repeats low airflow speed and pause.

• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification

operation and 4-min compressor off repeat.
Compressor ON Temp. ➲ Setting Temp+0.5°C
Compressor OFF Temp. ➲ Setting Temp-0.5°C

• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.

■ Heating Mode Operation

• When the intake air temp reaches +3°C above the setting temp, the compressor is turned off. When reaches

the setting temp, the compressor is turned on.
Compressor ON Temp. ➲ Setting Temp.
Compressor OFF Temp. ➲ Setting Temp.+3°C

• While in compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C, when above 28°C , it

operates with the low or setting airflow speed. When the indoor pipe temp is between 20°C and 28°C, it oper­ates with Super-Low(while in sleep mode, with the medium airflow speed).

• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C, when above 35°C , it

operates with the low airflow speed.

• If overloaded while in heating mode operation, in order to prevent the compressor from OLP operation, the

outdoor fan is turned on/off according to the indoor pipe temp.

• While in defrost control, both of the indoor and outdoor fans are turned off.

■ Defrost 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.

• After 40 min heating mode operation, at 4 min interval, whether to carry out defrost control or not and the time
of defrost control are determined according to the following conditions.

1) While in heating mode operation, the maximum of the indoor pipe temperature is measured and it is com-

pared with the present indoor pipe temperature to get the difference of the indoor pipe temperatures (=the
maximum temperature of indoor pipe ? the present temperature of indoor pipe), according to which, whether
to carry out defrost control or not is determined.

2) According to the need of defrost control shown above and the elapsed time of heating mode operation at that

moment, the defrost control time is determined.

3) When the determined time of defrost control is below 7 min, heating mode operation continues without carry-

ing out defrost control. According to the procedure stated above, the determination is made again. When the
defrost control time is 7 min or longer, defrost control is then carried out.

• While in defrost control, the minimum temp of the indoor pipe is measured and it is compared with the present
temp of the indoor pipe to get the difference of the indoor pipe temperatures (=the present temperature of the
indoor pipe ? the minimum temperature of the indoor pipe). When the difference is 5°C or higher, defrost con­trol is completed and heating mode operation is carried out.

• While in defrost control, if the defrost time determined before the start of defrost control is completed, defrost
control stops and heating mode operation is carried out regardless of the above condition.

• When the indoor pipe temp is 42°C or above, defrost control is not carried out even if the condition is one of
the defrost conditions above.

• While in defrost control, the compressor is on and the indoor fan, the outdoor fan, and the 4 way valve are off.

32 Room Air Conditioner

Operation

■ Airflow Speed Selection

• The airflow speed of the indoor fan is set to high, medium, low, or chaos (auto) by the input of the airflow
speed selection key on the remote control.

■ Sleep Timer Operation

• When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote control while in appli­ance operation, the operation of the appliance stops.

• While the appliance is on pause, the sleep timer mode cannot be input.

• While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperature
increases by 1°C. After another 30 min elapse, it increases by 1°C again.

• When the sleep timer mode is input while in cooling cycle mode, the airflow speed of the indoor fan is set to

the low.

• When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set to
the medium.

■ Chaos Natural Wind Mode

• When the Chaos Natural Wind mode is selected and then operated, the high, medium, or low speed of the air­flow mode is operated for 2~15 sec. randomly by the Chaos Simulation.

■ Jet Cool Mode Operation (C/O Model)

• If the Jet Cool key is input at any operation mode while in appliance operation, the Jet Cool mode operates.

• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.

• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C

• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.

• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and then

operated in order that the air outflow could reach further.

■ Jet Cool Mode Operation (H/P Model)

• 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 at super-high speed for 30 min at cooling mode operation.

• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C.

• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.

• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and then

operated in order that the air outflow could reach further.

■ Forced Operation

• Operation procedures when the remote control can't be used.

• The operation will be started if the power button is pressed.

• If you want to stop operation, re-press the button.

Cooling Model

Operating mode Cooling Cooling Healthy Dehumidification Heating

Indoor FAN Speed

Setting Temperature

High High High High

22°C22°C23°C24°C

Room Temp. ≥ 24°C 21°C ≤ Room Temp. < 24°C Room Temp. < 21°C

Heat pump Model

• While in forced operation, the key input by the remote control has no effect and the buzzer sounds 10 times to
indicate the forced operation.

Service Manual 33

Operation

■ Test operation

•

During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of room tem­perature and resets in 18±1 minutes.

•

During test operation, if remote controller signal is received, the unit operates as remote controller sets.
If you want to use this operation, open the front panel upward and Press the power button let it be pressed for
about 3 seconds.

•

If you want to stop the operation, re-press the button.

■ Auto restart

•

In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate
procedures automatically to the previous operating conditions.

■ Protection of the evaporator pipe from frosting

• If the indoor pipe temp is below 0°C in 7 min. after the compressor operates without any pause while in cool­ing cycle operation mode, the compressor and the outdoor fan are turned off in order to protect the indoor
evaporator pipe from frosting.

• When the indoor pipe temp is 7°C or higher after 3 min. pause of the compressor, the compressor and the
outdoor fan is turned on according to the condition of the room temperature.

■ Buzzer Sounding Operation

• When the appliance-operation key is input by the remote control, the short "beep-beep-" sounds.

• When the appliance-pause key is input by the remote control, the long "beep—" sounds.

34 Room Air Conditioner

Display Function

3sec 3sec 3sec

(once)

1. Heating Model 2. Cooling Model

Operation

Operation Indicator

• Cooling, Soft Dry, Fan, Heating • Cooling, Soft Dry, Fan

Deicer Indicator

• Hot-start, Deice

Operation Indicator

Compressor on Indicator

Self-diagnosis Function

Error

Code

1

Error Display LED

(Indoor body operation LED)

Error contents

• Indoor room temperature
thermistor open/short

• Indoor pipe temperature
thermistor open/short.

OUT

DOOR

SVC check point

• Indoor Thermistor
assembly check

Service Manual 35

36 Service Manual

3

4

Disassembly

Earth
Conductor

Indoor Unit

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.

• Set the up-and-down air discharge louver to open
position (horizontally) by finger pressure.

• Remove the securing screws.

• To remove the Grille, pull the lower left and right

side of the grille toward you (slightly tilted) and lift it
straight upward.

Disassembly

1. Before removing the control box, be sure to

take out the wire screwed at the other end.

Service Manual 37

Disassembly

Screw

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
discharge 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).

• When repair, do not damage the Caution label.

38 Room Air Conditioner

• Unhook the tab on the right inside of the chassis

Motor cover

Bearing

Cross-flow fan

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.

Disassembly

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 39

Schematic Diagram

Schematic Diagram

Electric Control Device

• Heat Pump Model(LED TYPE)

40 Room Air Conditioner

Wiring Diagram

Indoor Unit

Models: SE 9k,12k Cooling only Model

Schematic Diagr am

POWER

YL

/

MOTOR

BL

BR

GN

BR

SH-CAPA

YL

/

BL

BR

GN

T/BLOCK

YL

/

BL

BR

GN

TO OUTDOOR UNIT

YL

OR

BK

PWB ASM

CN-MOTOR

CN-TAB2 CN-TAB1

RY-COMP

CN-DISPLAY

DISPLAY PWB ASM

CN-TH

SSR

ZNR

CN-U/D

FORCE
S/W

FUSE

)

(250V/2A

CN-FORCE

CN-SUB

INDOOR WIRING DIAGRAM

Models: SE 9k,12k Heat pump Model

POWER

YL

/

N

BL

BR

G

BR

K
C
O
L

1(L)32(N)

B

/
T

R
B

TO OUTDOOR UNIT

SH-CAPA

BL

L
B

MOTOR

BR

YL

/

N
G

YL

/

N
G

OR

PWB ASM

MOT

­N
C

OR

BK

YL

BK

RD

BK

RD

4

B1
A
T

­N
C

B2

N-TA
C

RY-COMP

RY-4WAY

RY-FAN

CN-DISPLAY

DISPLAY PWB ASM

SSR

FUSE

(250V/2A

ZNR

INDOOR WIRING DIAGRAM

THERMISTOR

N-TH
C

D

STEP

U/

MOTOR

N­C

FORCE
S/W

)

CN-FORCE

UB
S

SUB PCB

N­C

THERMISTOR

STEP
MOTOR

SUB PCB

CN-F/G

F/G

MOTOR

STEP

CN-F/G

R

G

TO

EP

F/

MO

ST

Service Manual 41

Wiring Diagram

Indoor Unit

Models: SY 9k,ST 12k Cooling only Model

Schematic Diagr am

POWER

YL

/

MOTOR

BL

BR

GN

BR

SH-CAPA

BL

BR

2(N)1(L)

T/BLOCK

BL

BR

TO OUTDOOR UNIT

CN-MOTOR

CN-MOTOR

OR

BK

YL

CN-TAB1

CN-TAB2

YL

/

GN

DISPLAY PWB ASM

3

YL

/

GN

PWB ASM

SSR

ZNR

FUSE

4 3

(250V/2A

RY-COMP

)

INDOOR WIRING DIAGRAM

FORCE S/W

CN-TH

THERMISTOR

STEP
MOTOR

CN-U/D

Models: SY 9k,ST 12k Heat pump Model

POWER

L
Y

/

L

N

R

MOTOR

B

B

G

YL

BR

SH-CAPA

L
Y

/

R

BL

B

BK

GN

1(L)2(N)

T/BLOCK

YL

/

BK

BL

BR

GN

TO OUTDOOR UNIT

R

R

PWB ASM

O

O

T

OT

MO
N-

C

N-M

TRIAC

C

OR

BK

SSR

1
B
A

-T
N
C

2
B
A

-T
N
C

34

RY-COMP

RY-4WAY

RY-FAN

RD

DISPLAY PWB ASM

43

D
R

FORCE S/W

H
T

N­C

THERMISTOR

ZNR

D

STEP

U/

-

MOTOR

N
C

FUSE

(250V/2A

)

INDOOR WIRING DIAGRAM

Service Manual 42

Schematic Diagram

Outdoor Unit

Models: Cooling only Model

BLUE

CAPACITOR

H

C

F

BLUE

GREEN

R

C

BROWN

OVERLOAD
PROTECT

BROWN

TERMINAL BLOCK

RED

BLUE

S

COMP

YELLOW/GREEN

BROWN

BLUE

1(L)

2(N)

BLUE

BROWN

YELLOW

THE UNIT INDOOR

OUTDOOR DIAGRAM WIRING

Models: Heat pump Model

BLUE

RED

FAN

YELLOW

S

R

COMP

C

BROWN

YELLOW/GREEN

OVERLOAD
PROTECT

BROWN

1(L)

YELLOW/GREEN

OUTDOOR DIAGRAM WIRING

RED

BLUE

BROWN

BLUE

3

2(N)

BLUE

BROWN

THE UNIT INDOOR

H

VALVE,REVERSING

BLUE

4

RED

BLACK

CAPACITOR

C

BLUE

BLUE

TERMINAL BLOCK

RED

F

FAN

YELLOW

43 Room Air Conditioner

Schematic Diagram

Components Location

MAIN P.W.B ASSEMBLY

• TOP VIEW

• BOTTOM VIEW

44 Room Air Conditioner

DISPLAY ASSEMBLY

Schematic Diagram

Service Manual 45

Troubleshooting Guide

INDOOR UNIT OUTDOOR UNIT

INDOOR UNIT OUTDOOR UNIT

HEAT
EXCHANGE
(EVAPORATOR)

HEAT
EXCHANGE
(EVAPORATOR)

HEAT
EXCHANGE
(CONDENSER)

HEAT
EXCHANGE
(CONDENSER)

COMPRESSOR

COMPRESSOR

ACCUMU
LATOR

GAS SIDE

GAS SIDE

3-WAY VALVE

LIQUID SIDE

LIQUID SIDE

3-WAY VALVE

CAPILLARY TUBE

CAPILLARY TUBE

CHECK VALVE

(Heating Model only)

COOLING
HEATING

REVERSING
VALVE
(Heating Model Only)

Troubleshooting Guide

Refrigeration Cycle Diagram

(1) Cooling Only Models

(2) Cooling & Heating Models

46 Room Air Conditioner

2-way, 3-way Valve

Valve cap

Open position
Closed position

Pin

Service
port

Service
port cap

To outdoor unit

Flare nut

To
piping
connection

To outdoor unit

Hexagonal wrench (4mm)

Open position
Closed position

To
piping
connection

Flare nut

Troubleshooting Guide

2-way Valve (Liquid Side) 3-way Valve (Gas Side)

Works

Shipping

Air purging

1.

(Installation)

Operation

Pumping down

2.
(Transfering)

Evacuation

3.

(Servicing)

Gas charging

4.

(Servicing)

Pressure check

5.

(Servicing)

Gas releasing

6.
(Servicing)

Shaft position Shaft position Service port

Closed Closed Closed

(with valve cap) (with valve cap) (with cap)

Open Closed Open

(counter-clockwise) (clockwise) (push-pin or with

vacumm pump)

Open Open Closed

(with valve cap) (with valve cap) (with cap)

Closed Open Open

(clockwise) (counter-clockwise) (connected manifold

gauge)

Open Open Open

(with charging

cylinder)

Open Open Open

(with charging

cylinder)

Open

(with charging cylinder)

Open

(with charging cylinder)

Service Manual 47

Open Open

Open Open

Troubleshooting Guide

Lo

Closed

Purge the air

Outdoor unit

Indoor unit

Liquid side

Gas side

CLOSE

Open

2-Way
valve

3-Way
valve

CLOSE

Pumping Down

• Procedure

(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.

(2) Operate the unit for 10 to 15 minutes.

(3) Stop operation and wait for 3 minutes, then

(4) Air purging of the charge hose.

(5) Set the 2-way valve to the closed position.

connect the charge set to the service port of
the 3-way valve.

– Connect the charge hose with the push pin to

the service port.

– Open the low-pressure valve on the charge set

slightly to air purge from the charge hose.

48 Room Air Conditioner

(6) Operate the air conditioner at the cooling

cycle and stop it when the gauge indicates
1kg/cm2g.

(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.

(8) Disconnect the charge set, and mount the 2-

way and 3-way valve’s 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.

Do not use the existing charge set for R-22.
It is necessary to use new charge set for R-410A.
The pressure of R-410A is 1.6 times higher than
that of R-22. Thus, the high pressure side gauge of
charge set should be used higher pressure gauge
of 50kg/cm2 range.

Balance Refrigerant of the 3-way Valve

Lo

Open

Open

3-Way
valve

3-Way
valve

Gas side

CLOSEOPEN

Outdoor unit

Liquid side

Indoor unit

(Gas leakage)

Troubleshooting Guide

• Procedure

(1) Confirm that both the 2-way and 3-way valves

are set to the back seat.

(2) Connect the charge set to the 3-way valve’s

port.

– Leave the valve on the charge set closed.
– Connect the charge hose to the service port.

(3) Open the valve (Lo side) on the charge set and

discharge the refrigerant until the gauge indi­cates 0 kg/cm2G.

– 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 refrig­erant until the gauge indicates 0.5 to 1

2

kg/cm
sary to apply a evacuatin.

– Discharge the refrigerant gradually; if it is dis-

charged too suddenly, the refrigeration oil will
also be discharged.

G. if this is the case, it will not be neces-

Service Manual 49

Troubleshooting Guide

Lo

Open

Open

Vacuum pump

3-Way
valve

Outdoor unit

Liquid side

Indoor unit

Gas side

3-Way
valve

CLOSE

OPEN

Evacuation

(All amount of refrigerant leaked)

• Procedure

(1) Connect the vacuum pump to the center hose

of charge set center hose

(2) Evacuation for approximately one hour.

– Confirm that the gauge needle has moved

toward -76 cmHg (vacuum of 4 mmHg or less).

(3) Close the valve (Lo side) on the charge set,

turn off the vacuum pump, and confirm that
the gauge needle does not move (approxima­tely 5 minutes after turning off the vacuum
pump).

(4) Disconnect the charge hose from the vacuum

pump.

– Vacuum pump oil.

If the vacuum pump oil becomes dirty or
depleted, replenish as needed.

Use vacuum pump equipped with check value
applied to be prevented from flowing backward.

50 Room Air Conditioner

Gas Charging

(After Evacuation)

Troubleshooting Guide

Indoor unit

Check valve

Charging
cylinder

Lo

(1)

OPEN

• Procedure

(1) Connect the charge hose to the charging

cylinder.

– 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 sys­tem can be charged with liquid.

(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 refriger­ant). The procedure is the same if using a gas
cylinder.

Liquid side

Gas side

CLOSE

3-Way

Open

valve

Open

3-Way
valve

\

Outdoor unit

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.

(4) Immediately disconnect the charge hose from

the 3-way valve’s service port.

– 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 suffi­cient, 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.

This unit is charged with R-410A.
Pay attention not to charge R-22.

Service Manual 51

52 Room Air Conditioner

Troubleshooting Guide

Additional gas charging

(Gas leakage)

• When refrigerant is insufficient by leakage, recharge the unit with the refrigerant up to normal operating suc­tion pressure.

• Use the graph or the equation below to get operating suction pressure according to indoor and outdoor tem­perature.
Suction pressure was measured at 3-way valve service port after operating the unit for 10 minutes.

The method of using graph

- Find outdoor temperature.

- Find indoor temperature onto the curve of outdoor temperature.

- Read suction pressure at the axis of ordinates.

The method of using equation

-. Calculate suction pressure after putting indoor and outdoor temperature into the equation.

13

(At operating the Unit for 10 minutes)

Suction Pressure

(Kg/cm

2

.g)

Outdoor Temp.

(˚C)

Indoor Temp. (˚C)

12
11
10

9
8
7
6
5

5 10152025303540

50˚C

40˚C

30˚C

20˚C
10˚C

0˚C

P = 3 + 0.0123 x Tout

1.5

+ 0.8 x Tin

0.5

Where, P : Suction Pressure(kg/cm

2

.

g)
Tout : Outdoor Temperature(˚C)
Tin : Indoor Temperature(˚C)

Operating Suction Pressure (For R401A)

(According to Indoor & Outdoor Temperature)

Cycle Parts

Trouble analysis

1. Check temperature difference between intake and discharge air and operating current.

Troubleshooting Guide

Temp. Difference

Operating Current

Temp. difference : approx. 0°C
Current : less than 80% of

rated current

Temp. difference : approx. 8°C
Current : less than 80% of

rated current

Temp. difference : less than 8°C
Current : over the reated

current

Temp. difference : over 8°C

• All amount of refrigerant leaked
out. Check refrigeration cycle.

• Refrigerant leakege
Clog of refrigeration cycle
Defective compressor

• Excessive amount of refrigerant

• Normal

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
temperature difference is larger.

2. Check temperature and pressure of refrigeration cycle.

Suction pressure Temperature

(Compared with (Compared with Cause of Trouble Description

the normal value) the normal valve)

High

Higher

Normal refrigerant rise at the beginning of

Lower Higher refrigerant (Leakage)

Defective compressor Current is low.
Defective 4-way reverse valve

Excessive amount of High pressure does not quickly

operation.

Insufficient amount of Current is low.

Clogging Current is low.

NOTICE

1. The suction pressure is usually 8.5~9.5 kg/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.

Service Manual 53

Troubleshooting Guide

Electronic Parts

Product does not operate at all.

(* Refer to Electronic Control Device drawing and Schematic diagram.)

Turn off Main Power

(After 10 seconds)

Turn on Main Power

Does "beeping" sound is made from the Indoor Unit?

NO

Check the voltage of power(About AC 220V, 60Hz)

(About AC 220/240V, 50Hz)

• Main power's voltage

• Voltage applied to the unit

• Connecting method of Indoor/Outdoor connecting

cable

• Check PWB Assembly

- Fuse

- Pattern damage

- Varistor(ZNR01J)

Check the connection housing for contacting

• Connector related to CN-NI, RY-COMP NO.3

• Connector related to CN-MOTOR

• Connector contacting of Outdoor Fan/Compressor

• Display PCB Assembly Check

YES

Primarily, the operating condition of Micom is OK.

Check each load(Indoor/Outdoor Fan Motor,
Compressor, Stepping Motor) and contacting
condition of related connector

Items

• SMPS Transformer
(Indoor unit)

- Input Voltage

- Output Voltage(C03D)

• IC01D(7805) Output
(Indoor/Outdoor unit)

• IC01A(KIA7036, Reset IC)
OSC01B(8MHz)

54 Room Air Conditioner

Main PCB Board Operation Check

Content Remedy

- About AC220V/240V±10% - Check the power voltage

- About DC12V

• DC +5V

• Voltage of IC No.1,

(DC +4.5V over) and Soldering condition.

• Replace Trans

• Replace IC01D

• Replace faulty parts

The product is not operate with the remote controller.

Turn on Main Power

While the compressor has been stopped, the compressor does not

operate owing to the delaying function for 3 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 by force.)

Troubleshooting Guide

Cause by the remote control

When the mark( ) is displayed in LCD screen, replace
battery.

Check the connecting circuit between the remote controller
MICOM (No. ) - R16(1.5k) - IR LED - TR - R17(1Ω).

or

MICOM (No. ) - R1(1.5k) - IR LED - TR - R2(1Ω).

61

Caused by other parts except the remote control

Check the contact of CN-DISP1 connector.

Check Display PCB Assembly

- Voltage between CN DISP1 - : DC +5V

Check point

• Check the connecting circuit between CN-DIS1 ­R11L(100Ω) - C01A(100nF) - MICOM PIN

• Check Receiver Assembly

Service Manual 55

Troubleshooting Guide

Compressor/Outdoor Fan are unable to drive.

Turn on Main Power

Operate "Cooling Mode( )" by setting the desired 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 attached as close as to be
effected by the temperature of Heat Exchanger(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 RY-FAN.

• Check the indoor temperature sensor is disconnected or not(About 10kΩ / at 25°C).

Check Relay(RY - COMP) for driving compressor.

• When the power(About AC220V/240V) is applied to the connecting wire
terminal support transferred to compressor, PWB Assembly is normal.

• Check the circuit related to the relay.

Check point COMP ON COMP OFF

Between Micom(No.

59) and GND

Between IC01M(No. 15) Below DC 1V

and GND (app)

Turn off Main Power

• Check the electrical wiring diagram of outdoor side.

• Check the abnormal condition for the component of

Compressor/Outdoor Fan Motor.

• Check the "open" or "short" of conmecting wires between indoor and
outdoor.

DC5V DC0V

About DC12V

56 Room Air Conditioner

When indoor Fan does not operate.

Turn off Main power

Check the connection of CN-MOTOR

Check the Fan Motor

Check the Fuse(AC250V/T2A)

Troubleshooting Guide

Check the related circuit of indoor Fan Motor.

• The pin NO 58 of Micom, and the part for driving TRIAC(the input and
output signal of IC01M, PIN NO 1, 16)

• Check the pattern

• Check the TRIAC

- TRIAC Open: Indoor Fan Motor never operate

- TRIAC short: Indoor Fan Motor always operates in case of ON or OFF.

Turn ON Main Power

Check the TRIAC high speed operation by remote control.

(The Indoor Fan Motor is connected)

The voltage of PIN NO 1(orange) and 3(yellow) of CN-MOTOR.

About AC 180V over About AC 50V over

TRIAC is not damaged TRIAC Check

Service Manual 57

Troubleshooting Guide

When Vertical Louver does not operate.

• 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 PWB) of CN-U/D Connector

Check the operating circuit of the Vertical Louver

• Confirm that there is DC +12V between pin (RED) of CN-U/D and
GND.

• Confirm that there is a soldering short at following terminals.

- Between , , and of MICOM

- Between , , and of IC01M

- Between , , and of IC01M

60 61 62 63

If there are no problems after above checks

• Confirm the assembly conditions that are catching and interfering parts
in the rotation radial of the Vertical Louver

58 Room Air Conditioner

When Heating does not operate

Operate “Heating Mode( )” by setting the desired temperature of the
remote control is higher than one of the indoor temperature by 2°C at
least.

In heating Mode, the indoor fan operates in case the pipe temperature
is higher than 28°C.

Check the connector of intake and pipe sensor(thermistors)

• Check the related circuit of RY-4WAY

• Check the indoor room temperature is disconnected or not (about

10KΩ/at 25°C).

• Check the indoor pipe temperature is disconnected or not (about

5KΩ/at 25°C).

Troubleshooting Guide

Turn ON Main Power

Check the DC voltage on the PWB ASSEMBLY

• The details of check are as followings

• Comp Relay.

Check point

Between Micom

(NO.59) and GND

Between IC01M

(NO.15) and GND

Comp ON

DC 5V

Below DC 1V

Comp OFF

DC 0V

About DC

12V

• 4 way Relay

Check point

Between Micom

(NO.51) and GND

Between IC02M

(NO.11) and GND

4 way ON

DC 5V

Below DC 1V

4 way OFF

DC 0V

About DC 12V

• Outdoor fan Relay

Check point

Between Micom

(NO.53) and GND

Between IC02M

(NO.12) and GND

Fan ON

DC 5V

Below DC 1V

Fan OFF

DC 0V

About DC 12V

Service Manual 59

Troubleshooting Guide

• Check the electrical wiring diagram of outdoor side.

• Check the abnormal condition for the component of

Compressor/Outdoor Fan Motor, 4 way.

• Check the "open" or "short" of connecting wires between indoor and
outdoor.

Turn off Main Power

60 Room Air Conditioner

135301

152302

342800

264110

263230

359011

131410 733010

135312

135311

159901

268712

146811

668713

346810

266090

135516

35211B

354210

249951

268714

267110

Exploded View

Exploded View

Indoor Unit

Service Manual 61

Exploded View

559010

552202

552111

649950

430410

552203-2

546810

435301

437210

561410

567502

554160

552203-1

552116

447910

W0CZZ

552201

554031

237205

437212

237204

435511

550140

552102-1

Outdoor Unit: 9k Heat Pump,12k Series

62 Room Air Conditioner

Service Manual 63

554031

435512

437212

435511

W0CZZ

552202

552116

554160

550140

552203-2

552203-1

430410

447910

649950

552111

552201

552102-1

552102-2

437210

435301

559010

546810

561410

Outdoor Unit: 9k Cool Only Seriess

Exploded View

Replacement Parts list

Replacement Parts list

Service Manual 64

NOTE) *Please ensure GCSC since these parts may be changed depending upon the buyer's request.

(GCSC WEBSITE http://biz.LGservice.com)

Parts List (Indoor)

LOCATION

No.

430410 3041A20013H 3041A20092B 3041A20013H 3041A20092B R
435301 3530A10059B 3530A20093E 3530A10059B 3530A20093E R
435511 2H02384C 2H02384C 2H02384C 2H02384C R
437210 3721A20050E 3721A10099K 3721A20050E 3721A10099K R
437212 3721A20054F 3720A10016S 3721A20054F 3720A10016S R
435512 3550A20046B -- 3550A20046B -- R
447910 4790A10025D 4790A10007B 4790A10025D 4790A10007B R
546810 4681A10020M 4681A10020A 4681A10020M 4681A10020J R
550140 4984AR4361A 4984AR4390A 4984AR4361A 4984AR4390A R

552102 5210A21761V 5424AR3531E 5210A31413A 3H01535Y R
552203-1 5220AR2609D 5220AR2609F 5220AR2609F 5220AR2609F R
552203-2 5220AR2578C 5220A20003E 5220AR2578F 5220A20003E R

554031 5403A20106E 5403A20113G 5403A20106E 5403A20113Q R

554160 2520UCAK044 2520UCAJ020 2520UCAK044 TBZ31018301 R

559010 5900AR1266D 5901A10057A 5900AR1266D 5901A10057A R

567502 6750U-L002A 6750U-L016A 6750U-L002A -- R

W0CZZ 2A00986Q 2H01451P 2A00986Q 2H01451S R

DESCRIPTION

BASE ASSEMBLY ,OUT

GRILLE DISCHARGE

COVER ASSEMBLY ,CONTROL

PANEL ASSEMBLY,FRONT

Panel Assembly,Rear

COVER

BARRIER ASSEMBLY,OUTDOOR

MOTOR ASSEMBLY,OUTDOOR

ISOLATOR,COMP
TUBE CAPILLARY

VALVE,SERVICE
VALVE,SERVICE

CONDENSER ASSEMBLY,BEND

COMPRESSOR,SET

FAN ASSEMBLY,PROPELLER

O.L.P

CAPACITOR,DRAWING

TS-C096EMA0 TS-C126EMA0 TS-C096YDA0 TS-C126TDA0

PART No.

REMARK

LOCATION

Replacement Parts List

Parts List (Indoor)

NOTE) *Please ensure GCSC since these parts may be changed depending upon the buyer's request.

(GCSC WEBSITE http://biz.LGservice.com)

65 Room Air Conditioner

No.

131410 3141A20035B 3141A20035B 3141A20019G 3141A20035C R
135311 3531A10367D 3531A10367D AEB30975809 AEB31754004 R
135312 3531A11023V 3531A11023V AEB30975913 AEB30934408 R
135516 3551A30166A 3551A30166A 3551A30166A 3551A30166A R
146811 4681A20117A 4681A20117A 4681A20117A 4681A20117A R
152302 5230A20064A 5230A20064A MDJ32395201 MDJ34608301 R
263230 6323A20043A 6323A20043A 6323A24001A 6323A20004A R
264110 6411A30001R 6411A30001R 6411A30001R 6411A30001R R
267110 6711A20091M 6711A20091M 6711A20111D 6711A20111D R
268712 6871A20996A 6871A20996A 6871A30044D 6871A30044D R
268714 6871A20925A 6871A20925A EBR32724404 EBR32724407 R
268714 6871A20995C 6871A20994A - - R
268714 6871A20994A 6871A20993A - - R
268714 6871A20993A - - - R
342800 4280A20004A 4280A20004A 4280A20004A 4280A20004A R
346810 4681A10023P 4681A10023P 4681A10023P 4681A10023S R

35211B 5211A21144T 5211A21144U 5211A21144H 5211A21144U R

354210 5421A20262C 5421A20263B ADL31252801 5421A20263E R
354210 5421A20263B 5421A20262C ADL31252601 5421A20262C R
359011 5901A20017H 5901A20017H 5901A20017A 5901A20017H R
733010 3301A20020G 3301A20020G 3301A20020J 3301A20020G R

W0CZZ 3H01487A 3H01487A 3H01487A 3H01487A R

DESCRIPTION

CHASSIS ASSEMBLY

GRILLE ASSEMBLY,DISCHARGE

GRILLE ASSEMBLY,FRONT

COVER ASSEMBLY, MOTOR

MOTOR ASSEMBLY ,STEP

FILTER(MECH.),A/C

THERMISTOR,ASSEMBLY

POWER CORD ASSEMBLY

REMOTE CONTROLLER ASSEMBLY

PWB(PCB) ASSEMBLY,DISPLAY

PWB(PCB) ASSEMBLY,MAIN
PWB(PCB) ASSEMBLY,MAIN
PWB(PCB) ASSEMBLY,MAIN
PWB(PCB) ASSEMBLY,MAIN

BEARING

MOTOR ASSEMBY,INDOOR

TUBE ASSEMBLY,TUBING
EVAPORATOR ASSEMBLY,FIRST
EVAPORATOR ASSEMBLY,FIRST

FAN ASSEMBLY,CROSS FLOW

PLATE ASSEMBLY,INSTALL

CAPACITOR,DRAWING

TS-H096EMA0 TS-H126EMA0 TS-H096YDA0 TS-H126TDA0

PART No.

Remark

Replacement Parts List

Parts List (Outdoor)

Service Manual 66

NOTE) *Please ensure GCSC since these parts may be changed depending upon the buyer's request.

(GCSC WEBSITE http://biz.LGservice.com)

LOCATION

No.

430410 3041A20013H 3041A20092B 3041A20013H 3041A20092B R
435301 3530A10059B 3530A20093E 3530A10059B 3530A20093E R
435511 2H02384C 2H02384C 2H02384C 2H02384C R
437210 3721A20050E 3721A10099K 3721A20050E 3721A10099K R
437212 3721A20054F 3720A10016S 3721A20054F 3720A10016S R
447910 4790A10025D 4790A10007B 4790A10025D 4790A10007B R
546810 4681A10020M 4681A10020A 4681A10020M 4681A10020J R
550140 4984AR4361A 4984AR4390A 4984AR4361A 4984AR4390A R

552102 5210A21761V 5424AR3531E 5210A31413A 3H01535Y R
552203-1 5220AR2609D 5220AR2609F 5220AR2609F 5220AR2609F R
552203-2 5220AR2578C 5220A20003E 5220AR2578F 5220A20003E R

554031 5403A20106E 5403A20113G 5403A20106E 5403A20113Q R

554160 2520UCAK044 2520UCAJ020 2520UCAK044 TBZ31018301 R

559010 5900AR1266D 5901A10057A 5900AR1266D 5901A10057A R

567502 6750U-L002A 6750U-L016A 6750U-L002A -- R

W0CZZ 2A00986Q 2H01451P 2A00986Q 2H01451S R

DESCRIPTION

BASE ASSEMBLY ,OUT

GRILLE DISCHARGE

COVER ASSEMBLY ,CONTROL

PANEL ASSEMBLY,FRONT

Panel Assembly,Rear

BARRIER ASSEMBLY,OUTDOOR

MOTOR ASSEMBLY,OUTDOOR

ISOLATOR,COMP
TUBE CAPILLARY

VALVE,SERVICE
VALVE,SERVICE

CONDENSER ASSEMBLY,BEND

COMPRESSOR,SET

FAN ASSEMBLY,PROPELLER

O.L.P

CAPACITOR,DRAWING

TS-C096EMA0 TS-C126EMA0 TS-C096YDA0 TS-C126TDA0

PART No.

REMARK

Replacement Parts List

Parts List (Outdoor)

NOTE) *Please ensure GCSC since these parts may be changed depending upon the buyer's request.

(GCSC WEBSITE http://biz.LGservice.com)

Service Manual 67

LOCATION

No.

430410 3041A20092B 3041A20092B 3041A20092B 3041A20092B R

435301 3530A20093E 3530A20093E 3530A20093E 3530A20093E R

435511 2H02384C 2H02384C 2H02384C 2H02384C R

437210 3721A10099K 3721A10099K 3721A10099K 3721A10099K R

437212 3720A10016S 3720A10016S 3720A10016S 3720A10016S R

447910 4790A10007B 4790A10007B 4790A10007B 4790A10007B R

546810 4681A10020A 4681A10020J 4681A10020A 4681A10020J R

550140 4984AR4390A 4984AR4390A 4984AR4390A 4984AR4390A R
552102-1 5210A21761X 5210A31782B 3H01535W 5210A31413E R
552102-2 5210A26883A 5424AR3531E 3H03750G 5424AR3531E R

552201 5220A30001A 5220A30001A 5220A23002D 5220A23002C R

552202 5220AR3084C 5220AR3084C 5220AR3084C 5220AR3084C R
552203-1 5220AR2609F 5220AR2609F 5220AR2609F 5220AR2609F R
552203-2 5220AR2578F 5220A20003E 5220AR2578F 5220A20003E R

554031 5403A20188B 5403A20113P 5403A20188B 5403A20101N R

554160 2520UCAK052 2520UCAJ047 TBZ30817001 TBZ31126301 R

559010 5901A10057A 5901A10057A 5901A10057A 5901A10057A R

567502 6750U-L002A 6750U-L027A 6750U5L005B -- R

W0CZZ 2A00986Q 2H01451S 2H01451P 2H01451S R

DESCRIPTION

BASE ASSEMBLY ,OUT

GRILLE DISCHARGE

COVER ASSEMBLY ,CONTROL

PANEL ASSEMBLY,FRONT

GRILLE REAR

BARRIER ASSEMBLY,OUTDOOR

MOTOR ASSEMBLY,OUTDOOR

ISOLATOR,COMP
TUBE CAPILLARY
TUBE CAPILLARY

VALVE,CHECK

VALE,REVERSING

VALVE,SERVICE
VALVE,SERVICE

CONDENSER ASSEMBLY,BEND

COMPRESSOR,SET

FAN ASSEMBLY,PROPELLER

O.L.P

CAPACITOR,DRAWING

TS-H096EMA0 TS-H126EMA0 TS-H096YDA0 TS-H126TDA0

PART No.

REMARK