Room Air Conditioner

LG

Room Air Conditioner

SERVICE MANUAL

MODELS: AS-H0764DM0 AS-C0764DM0

AS-H0964DM0 AS-C0964DM0

AS-H1264DM0 AS-C1264DM0

AS-H1865DM0 LS-H0964DL0

AS-H2465DM0 LS-H1264DM0

LS-C1865DM0

LS-C2665DM0

LS-H1865DM0

LS-H2665DM0

website http://www.lgservice.com

LG

CAUTION

• 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 .............................................................................................................................................12

Product Specifications .................................................................................................................................16

Installation .....................................................................................................................................................20

Selection of the Best Location..................................................................................................................20

Piping Length and Elevation.....................................................................................................................20

How to Fix Installation Plate .....................................................................................................................21

Drill a Hole in the Wall ..............................................................................................................................21

Drain hose junction...................................................................................................................................21

Flaring work and connection of piping .......................................................................................................22

Flaring work..............................................................................................................................................22

Connection of Piping Indoor .....................................................................................................................22

Connection of the Pipes-Outdoor .............................................................................................................26

Connecting the cable between indoor unit and outdoor unit ...................................................................27

Connect the Cable to the Indoor Unit. ......................................................................................................27

Connect the Cable to the Outdoor Unit ....................................................................................................28

Checking the drainage and forming the pipings........................................................................................29

Checking the Drainage.............................................................................................................................29

Form the Piping ........................................................................................................................................29

AIR PURGING ................................................................................................................................................30

Air purging ................................................................................................................................................30

Air purging with vacuum pump .................................................................................................................30

Test Running .................................................................................................................................................32

Operation .......................................................................................................................................................33

Function of Controls .................................................................................................................................33

Display Function ......................................................................................................................................37

Self-diagnosis Function ............................................................................................................................37

Remote Control Operations......................................................................................................................38

Disassembly ..................................................................................................................................................39

Indoor Unit................................................................................................................................................39

Schematic Diagram.......................................................................................................................................42

Electric Control Device .............................................................................................................................42

Wiring Diagram.........................................................................................................................................43

Components Location ..............................................................................................................................46

Troubleshooting Guide .................................................................................................................................48

Refrigeration Cycle Diagram ....................................................................................................................48

2-way, 3-way Valve .................................................................................................................................49

Cycle Parts ...............................................................................................................................................55

Electronic Parts ........................................................................................................................................56

Exploded View...............................................................................................................................................63

Replacement Parts List ................................................................................................................................65

2 Room Air Conditioner

LG Model Name

2003

Code

1

1 2

Type

3

Producing Center,

Refrigerant

4 5 6

Code of Model

A~Z

2

3

4, 5

6

7

8

9

10

Product Type

Cooling/Heating/Inverter

Capacity

Electric Range

Chassis

Look

Function

Serial No.

A~Z

A~Z

0~9

1~9

A~Z

A~Z

A~Z

A~Z

1~9

7 8 9 10

Meaning

L: Chang-won R22 N: India

A: Chang-won R410A Z: Brazil

C: Chang-won R407C D: Indonesia

T: China M: Mexico

K: Turkey R22

E: Turkey R410A

H: Thailand

V: Vietnam

S: Out Sourcing

S: Split Type Air Conditioner

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

Cooling/Heating Capacity

Ex. "09"

→ 9,000 Btu/h

1: 115V/60Hz,

2: 220V/60Hz

3: 208-230V/60Hz

5: 200-220V/50Hz

6: 220-240V/50Hz

7: 110V, 50/60Hz

8: 380-415V/50Hz

9: 380-415V/60Hz

A: 220V, 50Hz, 3Phase

B: 208~230V, 60Hz, 3Phase

C: 575V, 50Hz, 3Phase

D: 440~460, 60Hz, 3Phase

E: 265V, 60Hz

F: 200V, 50/60Hz

Name of Chassis of Unit

Ex. LSP

→ SP Chassis

Look,

Color (Artcool Model)

Basic

Basic+4Way

Plasma Filter

Plasma Filter+4 Way

Tele+LCD

Tele+LCD+Nano plasma+4Way

Nano Plasma F+(A/changeove)+A/clean+Low A

Nano Plasma F+(A/changeove)+A/clean+4way+Low A

Tele+LED+4way

Internet

Plasma F+4Way+Oxy generator

Nano Plasma F+(A/changeove)+A/clean

Nano Plasma F+(A/changeove)+A/clean+4way

Nano Plasma F+(A/changeove)+A/clean+PTC

Nano Plasma F+(A/changeove)+Autoclean+4way+PTC

Nano Plasma F+(A/changeove)+A/clean+4way+Low A+PTC

Negative ION+A/Clean

(Nano)Plasma+Negative ION+A/Clean

4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean

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

LG Model De velopment Serial No.

* ARTCOOL COLOR

R

W

B

D

M

C

Mirror

White

Blue

Wood

Metal

Cherry

Service Manual 3

E

F

G

H

A

B

C

D

K

L

I

J

M

S

T

U

N

P

Q

R

2004~

Code

1

2

3

4, 5

6

7

8

9

10

1 2 3 4 5 6

Type

Producing Center,

Refrigerant

Code of Model

A~Z

Product Type

Cooling/Heating/Inverter

Capacity

Electric Range

Chassis

Look

Function

Serial No.

A~Z

A~Z

0~9

1~9

A~Z

A~Z

A~Z

A~Z

1~9

7 8 9 10

Meaning

L Chang_won R22

N India

A Chang_won R410A

T China

K Turkey R22

E Turkey R410A

H Thailand

X Mexico

V Vietnam

S Out sourcing

S: Split Type Air Conditioner

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

Cooling/Heating Capacity

Ex. "09"

→ 9,000 Btu/h

1: 115V/60Hz,

2: 220V/60Hz

3: 208-230V/60Hz

5: 200-220V/50Hz

6: 220-240V/50Hz

7: 110V, 50/60Hz

8: 380-415V/50Hz

9: 380-415V/60Hz

A: 220V, 50Hz, 3Phase

B: 208~230V, 60Hz, 3Phase

C: 575V, 50Hz, 3Phase

D: 440~460, 60Hz, 3Phase

E: 265V, 60Hz

F: 200V , 50/60Hz

Name of Chassis of Unit

Ex. LSP

Look,

→ SP Chassis

Color (Artcool Model)

CHASSIS Look

S4/S5 D

S6

SQ

SR

ST

M

N

D

P

K

L

G

Division

Panel Type(Deluxe)

Fighting 'Look'

(LG1)

(LG2)-SEMI PANEL

OEM1

OEM2

Panel Type(Deluxe)

LG3

Basic

Basic+4Way

Plasma Filter

Plasma Filter+4 Way

Tele+LCD

Tele+LCD+Nano plasma+4Way

NBF F+(A/changeove)+A/clean+Low A

NBF F+(A/changeove)+A/clean+4way+Low A

Tele+LED+4way

Internet

Plasma F+4Way+Oxy generator

NBF F+(A/changeove)+A/clean

NBF F+(A/changeove)+A/clean+4way

NBF F+(A/changeove)+A/clean+PTC

NBF F+(A/changeove)+Autoclean+4way+PTC

NBF F+(A/changeove)+A/clean+4way+Low A+PTC

(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

E

F

G

H

A

B

C

D

M

N

P

Q

J

I

K

L

W

8

Dry contact

Wire remocon

LG Model De velopment Serial No.

* ARTCOOL COLOR

R

W

B

D

M

C

Mirror

White

Blue

Wood

Metal

Cherry


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.

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

• There is risk of electric shock.

Install the panel and the cover of control box securely.

• There is risk of fire of electric shock.

.Do not modify or extend the power cord.

• No grounding may cause electric shock.

Service Manual 5


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.

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


Be cautious when unpacking and installing the product.

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

• Sharp edges could cause injury. Be especially careful of the case edges and the fins on the condenser and evaporator.


Do not install the product on a defective installation stand.

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

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

Do not turn the air-conditioner ON or OFF by plugging or unplugging the power plug.

• There is risk of fire or electrical shock.

Use a dedicated outlet for this appliance.


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 and electric shock.

Do not allow water to run into electrical parts.

Do not store or use flammable gas or combustibles 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.

Wa x Thinner

Service Manual 7


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

• There is risk of electric shock or fire.

Be cautious that water could not enter the product.

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

■ 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.

• To avoid vibration or water leakage.

Use two or more people to lift and transport the air conditioner.

• Avoid personal injury.


90˚


■ Operation

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

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

• There is risk of fire, electric shock, or damage to the plastic parts of the product.

• There is risk of personal injury.

Wa x

Do not step on or put anyting on the product.

(outdoor units)

Do not insert hands or other objects through the air inlet or outlet while the air conditioner is plugged in.

• There is risk of personal injury and failure of product.

• There are sharp and moving parts that could cause personal injury.

Service Manual 9

Dimensions

Dimensions

Symbols Used in this Manual

This symbol alerts you to the risk of electric shock.

This symbol alerts you to hazards that could cause harm to the air conditioner.

NOTICE

This symbol indicates special notes.

Indoor Unit

H

D

W

Installation plate

Model

Dimension

W

H

D mm mm mm


7k, 9k, 12k Btu Series

840

270

153

H

Dimension

W

H

D

Model mm mm mm

W

D

Installation plate

18k, 24 Btu Series

1090

300

178

Dimensions

Service Manual 11

Dimensions

Outdoor Unit

W

L2

L3

L1

L2

L3

L4

L5

DIM

W

H

D

MODEL unit mm mm mm mm mm mm mm mm


Gas side

(3-way valve)

Liquid side

(2-way valve)

7k, 9k, 12k Series

56

464

17

130

717

498

229

270

Dimensions

W

L9

L10

L11

L5

L6

L7

L8

L1

L2

L3

L4

DIM

W

H

D

L7

MODEL mm mm mm mm mm mm mm mm mm mm mm mm mm mm

L6 L8 L9

AS-H2465DM0

546

162

162

54

74.5

79

340

25

630

25

870

655

320

370

Gas side

Liquid side

Service Manual 13

Dimensions

W

L5

L6

L7

L8

L9

L10

L1

L2

L3

L4

DIM

W

H

D

L6 mm mm mm mm mm mm mm

MODEL unit mm mm mm mm mm mm

L5 L7 L8

LS-C1865DM0

801

555

262

339

37

543.6

11.4

591

105

105

72.5

86.4

77

Liquid side

2-way valve

Gas side

3-way valve


W

L2

L3

DIM

L2

L3

L4

L5

W

H

D

L1 mm mm mm mm mm mm mm mm

MODEL

Gas side

(3-way valve)

Liquid side

(2-way valve)

AS-C1865DM0, LS-C2465DM0, AS-C2465DM0

AS-H1865DM0, LS-H1865DM0, LS-H2465DM0

840

577

276

337

64

611

16

156

Dimensions

Service Manual 15

Product Specifications

Product Specifications

Table-1

Model Name

AS-H0764DM0 AS-H0964DM0 AS-H1264DM0 LS-H1264DM0

Item Unit

Cooling Capacity

Heating Capacity

Moisture Removal

Power Source

Btu/h

l

/h

Ø, V, Hz

Air Circulation

Noise Level

Input

Indoor

Outdoor

Indoor

Outdoor

Cooling

Heating

Cooling m 3 /min dB (A)±3

W

Running

Current

E.E.R.

C.O.P

Motor Output

Heating

Cooling

Heating

Indoor

Outdoor

Indoor

A

Btu/hW

W

Dimensions

(W x H x D)

Net. Weight

Outdoor

Indoor

Outdoor mm kg

Refrigerant g

Airflow Direction Control (Up & Down)

Airflow Direction Control (Left & Right)

Chaos Wind

Timer

Self Diagnosis

Remocon Type

Service Valve

Liquid

Gas inch(mm)

Sleeping Operation

Drain Hose

Connecting Cable

Power Cord

7,800

8,050

9,500

10,350

12,100

13,200

12,000

13,200

1 1.2

1.2

1.2

1Ø,220-240V,50Hz 1Ø,220-240V,50Hz 1Ø,220-240V,50Hz 1Ø,220-240V,50Hz

5.0/5.7

20

32

47

5.8/6.6

20

33

47

8.8/9.5

22

41

49

8.8/9.5

22

41

49

710

690

3.1

3

10.98

3.42

7

22

860

880

4.1

4.2

11.0

3.42

7

22

1100

1130

5.3

5.1

11.0

3.42

14

22

1300

1250

6

5.8

9.2

3.1

14

22

840x270x153

717x481x228

7

24

800(R410A)

O

O

O

24Hr ON/OFF

840x270x153

717x481x228

7

24

820(R410A)

O

O

O

24Hr ON/OFF

840x270x153

717x481x228

7

25

850(R410A)

O

O

O

24Hr ON/OFF

840x270x153

717x481x228

7

27

800(R22)

O

O

O

24Hr ON/OFF

O

L.C.D wireless

1/4"(6.35)

3/8"(9.52)

O

O

O

L.C.D wireless

1/4"(6.35)

3/8"(9.52)

O

O

O

L.C.D wireless

1/4"(6.35)

1/2"(12.7)

O

O

O

L.C.D wireless

1/4"(6.35)

1/2"(12.7)

O

O

1.0mm

2 x3, 0.75mm

2 x2 1.0mm

2 x3, 0.75mm

2 x2 1.0mm

2 x3, 0.75mm

2 x2 1.0mm

2 x3, 0.75mm

2 x2

1.0mm

2 1.0mm

2 1.0mm

2 1.0mm

2



Table-2

Model Name

LS-H0964DL0 AS-C0764DM0 AS-C0964DM0 AS-C1264DM0

Item Unit

Cooling Capacity

Heating Capacity

Moisture Removal

Power Source

Btu/h

l

/h

Ø, V, Hz

Air Circulation

Noise Level

Input

Running

Current

E.E.R.

C.O.P

Indoor

Outdoor

Indoor

Outdoor

Cooling

Heating

Cooling

Heating

Cooling

Heating

Indoor m 3 /min dB (A)±3

W

A

Btu/hW

Motor Output

Dimensions

(W x H x D)

Net. Weight

Refrigerant g



Chaos Wind

Timer

Self Diagnosis

Remocon Type

Service Valve

Outdoor

Indoor

Outdoor

Indoor

Outdoor

Liquid

Gas

W mm kg inch(mm)

Sleeping Operation

Drain Hose

Connecting Cable

Power Cord

9,000

9,900

7,800 9,500 12,100

1.2

1 1.2

1.2


5.8/6.6

5 5.8

8.6

20

33

47

950

900

4.2

4

9.47

20

32

47

710

3.1

10.98

20

33

47

860

4.1

11

22

41

49

1100

5.3

11

3.22

7

22

840x270x153

717x481x228

7

24

720(r22)

7

22

840x270x153

717x481x228

7

24

750(R410A)

O

X

O

24Hr ON/OFF

O

O

O

24Hr ON/OFF

O O

L.C.A wireless L.C.A wireless

1/4"(6.35)

3/8"(9.52)

1/4"(6.35)

3/8"(9.52)

O

O

O

O

1.0mm

2 x3, 0.75mm2x2

1.0mm

2 x3, 0.75mm

2 x2

1.0mm

2 1.0mm

2

7

24

720(R410A)

O

O

1/4"(6.35)

3/8"(9.52)

O

O

14

22 22

840x270x153 840x270x153

717x481x228 717x481x228

7 7

25

850(R410A)

O

O

O O

24Hr ON/OFF 24Hr ON/OFF

O O

L.C.A wireless L.C.A wireless

1/4"(6.35)

1/2"(12.7)

O

O

1.0mm

2 x3, 0.75mm

2 x2 1.0mm

2 x3, 0.75mm

2 x2

1.0mm

2 1.0mm

2

Service Manual 17


Table-3

Model Name

LS-H1865DM0 LS-H2665DM0 AS-H1865DM0 AS-H2465DM0

Item Unit

Cooling Capacity

Heating Capacity

Moisture Removal

Power Source

Btu/h

l

/h

Ø, V, Hz

Air Circulation

Noise Level

Input

Running

Current

E.E.R.

C.O.P

Motor Output

Indoor

Outdoor

Indoor

Outdoor

Cooling

Heating

Cooling

Heating

Cooling

Heating

Indoor

Outdoor m 3 /min dB (A)±3

W

A

Btu/hW

W/W

W

Dimensions

(W x H x D)

Indoor

Outdoor mm

Indoor

Net. Weight kg

Outdoor

Refrigerant g



Chaos Wind

Timer

Self Diagnosis

Remocon Type

Service Valve

Liquid

Gas inch(mm)

Sleeping Operation

Drain Hose

Connecting Cable

Power Cord

18,500

19,800

24,000

26,400

18,500

19,800

24,000

26,400

1.8

2.9

1.8

2.9


13

42

15

42

13

42

15

42

40

56

1,990

1,840

45

56

2,700

2,770

40

56

1,810

1,800

45

56

2,330

2,360

9.2

8.4

9.3

3.16

12.6

12.6

8.2

2.73

8.2

8.2

10.27

3.2

10.5

10.5

10.3

3

23

72

25.6

82.9

23

72

25.6

82.9

1090 x 300 x 178 1090 x 300 x 178 1090 x 300 x 178 1090 x 300 x 178

840 x 5777 x 276 840 x 5777 x 276 840 x 5777 x 276 870 x 655 x 320

13

54

1200(R22)

O

13

60

1450(R22)

O

O

O

O

O


O O

13

54

13

60

1250(R410A) 1450(R410A)

O O

O

O

O

O


O O

L.C.D wireless L.C.D wireless L.C.D wireless L.C.D wireless

1/4"(6.35) 1/4"(6.35) 3/8"(9.52) 3/8"(9.52)

1/2"(12.7)

1.5mm

2

O

O x0.75mm

2

1.5mm

2

1/2"(12.7)

1.5mm

2

O

O x0.75mm

2

1.5mm

2

5/8"(15.88)

O

5/8"(15.88)

O

O O

1.5mm

2 x0.75mm

2 1.5mm

2 x0.75mm

2

2.5mm

2 2.5mm

2


Table-4

Model Name

Item Unit

Cooling Capacity

Moisture Removal

Power Source

Btu/h

l

/h

Ø, V, Hz

Air Circulation

Indoor

Outdoor m 3 /min

Noise Level

Indoor

Outdoor dB (A)±3

Input W

Running A

E.E.R.

Btu/hW

Motor Output

Indoor

Outdoor

W

Dimensions

(W x H x D)

Indoor

Outdoor mm

Indoor

Net. Weight kg

Outdoor

Refrigerant g



Chaos Wind

Timer

Self Diagnosis

Remocon Type

Service Valve

Liquid

Gas inch(mm)

Sleeping Operation

Drain Hose

Connecting Cable

Power Cord

LS-C1865DM0

18,500

1.8

1Ø,220-240V,50Hz

13

42

40

56

1,950

8.5

9.5

22

61

1090 x 300 x 178

801 x 555 x 262

13.5

60

1050(R22)

O

O

O

24Hr ON/OFF

O

L.C.D wireless

1/4"(6.35)

1/2"(12.7)

O

O

1.5mm

2

1.5mm

2


LS-C2465DM0

24,000

2.9

1Ø,220-240V,50Hz

15

42

45

56

2,700

12.6

8.89

25.6

82.9

1090 x 300 x 178

540 x 577 x 276

13.5

60

1300(R22)

O

O

O

24Hr ON/OFF

O

L.C.D wireless

3/8"(9.52)

5/8"(15.88)

O

O

2.5mm

2

2.5mm

2

Service Manual 19

Installation

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.

More than

5cm

More than 10cm

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

5cm

Piping Length and Elevation

Capacity

(Btu/h)

5k~14k

18k~28k

30k~38k

GAS

Pipe Size

LIQUID

Standard

Length

(m)

Max.

Elevation

B

(m)

3/8"(Ø9.52) 1/4"(Ø6.35) 4 or 7.5

1/2"(Ø12.7) 1/4"(Ø6.35) 4 or 7.5

1/2"(Ø12.7) 1/4"(Ø6.35) 4 or 7.5

5/8"(Ø15.88) 1/4"(Ø6.35) 4 or 7.5

5/8"(Ø15.88) 3/8"(Ø9.52) 4 or 7.5

5/8"(Ø15.88) 3/8"(Ø9.52)

3/4"(Ø19.05) 3/8"(Ø9.52)

7.5

7.5

7

7

15

15

15

15

15

Max.

Length

A

(m)

15

15

30

30

30

30

30

Additional

Refrigerant

(g/m)

20

20

20

20

30

30

50

More than 2.3m

Indoor unit

Outdoor unit

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

Grade

5K~28K

30K~38K

A

Clearance(cm)

10

30

B

5

12

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.

More than 60cm

More than 10cm More than 10cm

B

A

Outdoor unit

Oil trap

Indoor unit

A

Indoor unit

A

Outdoor unit

B

If case more than 5m

B

• 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.

I

More than 60cm

More than 70cm


How to Fix Installation Plate

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.

Installation Plate

Installation

Drill a Hole in the Wall

• Drill the piping hole with a ø70mm hole core drill.

Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side.

WALL

Indoor Outdoor

Chassis

Hook

Type "A" screw

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.

D

Ø70mm

C

Left rear piping

Installation plate

B

A

Right rear piping

Ø70mm

CHASSIS

(Grade)

7k, 9k, 12k

18k, 24k

A

75

105

Distance (mm)

B

65

65

C

105

260

D

65

65

• 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.

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.

Only the desired direction

Adhesive

Drain hose

Connecting part

Service Manual 21

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 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

90

°

Slanted Uneven Rough

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

mm

Outside diameter inch

Ø6.35

Ø9.52

1/4

3/8

Ø12.7

Ø15.88

Ø19.05

1/2

5/8

3/4

A mm

0~0.5

0~0.5

0~0.5

0~1.0

1.0~1.3

Check

• Compare the flared work with figure below.

• If flare is noted to be defective, cut off the flared section and re-flare it.

Smooth all round

Inside is shiny without scratches

= Improper flaring =

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.

Pipe

Reamer

Point down

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)

Flare nut

Inclined Surface damaged

Cracked Uneven thickness

Even length all round

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)

Drain hose

Copper tube

Flaring work

• Firmly hold copper pipe in a die in the dimension shown in the table above.

Handle

Bar

Bar

Yoke

Cone

Copper pipe

Clamp handle

Red arrow mark


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.

For right rear piping

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


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.

Drain hose

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.

Indoor unit tubing Flare nut Pipes

• Tighten the flare nut with a wrench.

Open-end wrench (fixed)

Flare nut

Connection pipe Wrench

Indoor unit tubing

Outside diameter mm

Ø6.35

Ø9.52

Ø12.7

Ø15.88

Ø19.05

inch

1/4

3/8

1/2

5/8

3/4

Torque kg.m

1.8

4.2

5.5

6.6

6.6

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

Tape

Connecting pipe

Drain hose

Connecting cable

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.

Drain pipe

Indoor unit drain hose

Vinyl tape(narrow)

Adhesive

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.

Plastic bands

Insulation material

Connecting cable

Drain hose

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

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

Connection pipe

Vinyl tape

(wide)

Wrap with vinyl tape

Connecting cable

Indoor unit pipe

Pipe

Vinyl tape(narrow)

Service Manual 23


• 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.


Pipe

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.

Drain hose

For left rear piping

Vinyl tape(wide)

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 cable

Drain pipe

Indoor unit tubing Flare nut Pipes

• Tighten the flare nut with a wrench.

Open-end wrench (fixed)

Wrench

Flare nut

Connection pipe

Indoor unit tubing

Outside diameter mm

Ø6.35

inch

1/4

Ø9.52

Ø12.7

Ø15.88

Ø19.05

3/8

1/2

5/8

3/4

Torque kg.m

1.8

4.2

5.5

6.6

6.6

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

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

Drain hose


• Hang the indoor unit from the hooks at the top of the installation plate.

• Insert the spacer etc. between the indoor unit and the installation plate and separate the bottom of the indoor unit from the wall.

Indoor unit

Spacer

Installation plate

8cm


Indoor unit drain hose

Adhesive

Vinyl tape

(narrow)

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.

Plastic bands

Insulation material

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

Connection pipe

Vinyl tape

(wide)


Indoor unit piping

Pipe

Vinyl tape(narrow)

Connecting cable



• Remove the spacer.

• Ensure that the hooks are properly seated on the installation plate by moving it left and right.

Connecting cable

Drain hose

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

• 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.

Pipe

Drain hose

Vinyl tape(narrow)

Wrap with vinyl tape(wide)

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.

• Unfold the tubing to downward slowly. ( )

Piping for passage through piping hole

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

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

• Bend the tubing to the left side of chassis.

Tubing holder

Service Manual 25


• Bad case

• Following bending type from right to left could cause problem of pipe damage.

Connection of the pipes-Outdoor

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

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

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

Outside diameter mm

Ø6.35

Ø9.52

Ø12.7

Ø15.88

Ø19.05

inch

1/4

3/8

1/2

5/8

3/4

Torque kg.m

1.8

4.2

5.5

6.6

6.6

Outdoor unit

Gas side piping

(Bigger diameter)

Liquid side piping

(Smaller diameter)

Torque wrench


Connecting the cable between indoor unit and outdoor unit

Connecting the cable between indoor unit and outdoor unit

Connect the cable to the Indoor unit.

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

SAA).

• 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.

• If a power plug is not to be used, provide a circuit breaker between power source and the unit as shown below.

(mm 2 )

Grade

NORMAL CROSS

-SECTIONAL AREA

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

Unit(A)

1.0

Indoor

1.0

Indoor

1.5

Indoor

2.5

Indoor

2.5

5.5

Outdoor Outdoor

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

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).

Main power source

Air

Conditioner

Circuit Breaker

Use a circuit breaker or time delay fuse.

(mm 2 )

NORMAL

CROSS

-SECTIONAL

AREA

Grade

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

1.0

1.5

2.5

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

NORMAL

CROSS-SECTIONAL

AREA 0.75mm

2

Service Manual 27

Connecting the cable between indoor unit and outdoor unit

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.

Connecting cable

Connecting cable

Outdoor Unit

Terminal block

Over 5mm

Cover control

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)

Grade

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

15 20 30 30 40

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 function of the overload.

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


Checking the drainage and forming the pipings

Checking the drainage and forming the pipings

Checking the drainage

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.

Pull the right and the left side.

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

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.

Seal small openings around pipings with a gum type sealer.

Taping

Drain hose

Pipings

Connecting cable

Drain piping

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

Downward slope

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

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

• 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.

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

Trap

• Do not make drain piping.

Do not raise

Accumulated drain water

Air

Water leakage

Water leakage

Waving

Water leakage

Tip of drain hose dipped in water

Ditch

Less than

50mm gap

Trap

Service Manual 29

Air purgingd

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 capillary 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

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

• 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.

Indoor unit

Outdoor unit

Manifold valve

Pressure gauge

Lo Hi

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.

Charge hose

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.

Nitrogen gas cylinder(in vertical standing position)


Soap water method

(1) Remove the caps from the 2-way and 3-way valves.

(2) Remove the service-port cap from the 3-way valve.

(3) To open the 2-way valve turn the valve stem counterclockwise 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.

Required time for evacuation when 30 gal/h vacuum pump is used

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

3-way valve

(Close)

2-way valve

(Open)

Gas side

Air purgingd

Liquid side

Hexagonal wrench

Cap

Indoor unit

Outdoor unit

Pressure gauge

Manifold valve

Lo Hi

Open Close

Vacuum pump

Service Manual 31

Test running

TEST RUNNING

1. Check that all tubing and wiring have been properly connected.

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

Settlement of outdoor unit

• 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.

Bolt

Tubing connection

Evaluation of the performance

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

(Heating).

Intake temperature

Discharge air

NOTE: If the actual pressure is higher than shown, the system is most likely over-charged, and charge should be removed.

If the actual pressure are lower than shown, the system is most likely undercharged, and charge should be added.

The air conditioner is now ready for use.

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

1. Connect a low-pressure gauge manifold hose to the charge port on the gas side service valve.

2. Open the gas side service valve halfway and purge the air from the manifold hose using the refrigerant gas.

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

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

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

0.5kg/cm2 G(14.2 to 7.1 P.S.I.G.), fully close the gas side valve 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.

Power-Failure Compensation Function User Selection ON/OFF

1) Operation Sequence

Press the forced switch until BUZZER sounds 2 times

(beep~beep~).

Release the forced switch if BUZZER sounds.

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

Discharge temperature

4. For reference; the gas side pressure of optimum condition is as below.(Cooling)

Refrigerant

R-22

R-410A

Outside ambient

TEMP.

The pressure of the gas side service valve.

35°C (95°F) 4~5kg/cm 2 G(56.8~71.0 P.S.I.G.)

35°C (95°F) 8.5~9.5kg/cm 2 G(120~135 P.S.I.G.)

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.

Power button


Operation

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


• 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.

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

Compressor OFF Temp

➲ Setting Temp+0.5°C

➲ 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

24°C

≤ Intake Air Temp<26°C

18°C

≤ Intake Air Temp<24°C

Intake Air Temp<18°C

➲ 25°C

➲ Intake Air Temp-1°C

➲ Intake Air Temp-0.5°C

➲ 18°C

Service Manual 33

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 compared 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 carrying 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.


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.

Operating mode

Indoor FAN Speed

Setting Temperature

Cooling Model

Cooling

High

22°C

Heat pump Model

Room Temp.

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

Cooling Healthy Dehumidification Heating

High

22°C

High

23°C

High

24°C

• 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 35

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.


Operation

Display Function

1. Heating Model


• Cooling, Soft Dry, Fan, Heating

Deicer Indicator

• Hot-start, Deice

2. Cooling Model


• Cooling, Soft Dry, Fan

Compressor on Indicator

OUT

DOOR

Self-diagnosis Function

Error

Code

Error Display LED

(Indoor body operation LED)

1

(once)

3sec 3sec 3sec

Error contents

• Indoor room temperature thermistor open/short

• Indoor pipe temperature thermistor open/short.

SVC check point

• Indoor Thermistor assembly check

Service Manual 37

Operation

Remote Control Operations

The controls will look like the following.

4

11

8

13

2

7

15

5

6

Signal transmitter

ON

CANCEL

OFF SET

AUTO CLEAN

1

3

Flip-up door

(opened)

Operation Mode

Cooling Operation

Auto Operation or Auto Changeover

Healthy Dehumidification Operation

Heating Operation

• Cooling Model( ), Heat Pump Model( )

10

9

12

17

14

16

1. START/STOP BUTTON

Operation starts when this button is pressed and stops when the button is pressed again.

2. OPERATION MODE SELECTION BUTTON

Used to select the operation mode.

3. ROOM TEMPERATURE SETTING BUTTONS

Used to select the room temperature.

4. INDOOR FAN SPEED SELECTOR

Used to select fan speed in four steps low, medium, high and CHAOS.

5. JET COOL

Used to start or stop the speed cooling.

(speed cooling operates super high fan speed in cooling mode.)

6. CHAOS SWING BUTTON

Used to stop or start louver movement and set the desired up/down airflow direction.

7. ON/OFF TIMER BUTTONS

Used to set the time of starting and stopping operation.

8. TIME SETTING BUTTONS

Used to adjust the time.

9. TIMER SET/CANCEL BUTTON

Used to set the timer when the desired time is obtained and to cancel the Timer operation.

10. SLEEP MODE AUTO BUTTON

Used to set Sleep Mode Auto operation.

11. AIR CIRCULATION BUTTON

Used to circulate the room air without cooling or heating.

12. ROOM TEMPERATURE CHECKING BUTTON

Used to check the room temperature.

13. PLASMA(OPTIONAL)

Used to start or stop the plasma function.

14. HORIZONTAL AIRFLOW DIRECTION CONTROL

BUTTON (OPTIONAL)

Used to set the desired horizontal airflow direction.

15. RESET BUTTON

Used prior to resetting time.

16. 2ND F BUTTON

Used prior to using modes printed in blue at the bottom of buttons.

17. AUTO CLEAN (OPTIONAL)

Used to set Auto Clean mode.


Disassembly

Disassembly

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.

1. Before removing the control box, be sure to take out the wire screwed at the other end.

Earth

Conductor

Service Manual 39

Disassembly

2. To remove the Control Box.

• Remove securing screws.

• Pull the control box out from the chassis carefully.

3. To remove the Discharge Grille.

• Unhook the discharge grille and pull the discharge grille out from the chassis carefully.

Screw

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.


Disassembly

• Unhook the tab on the right inside of the chassis at the same time, slightly pull the evaporator toward you until the tab is clear of the slot.

5. To remove the Motor Cover

• Remove 2 securing screw.

• Pull the motor cover out from the chassis carefully.

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.

Motor cover

Bearing

Cross-flow fan

Service Manual 41

Schematic Diagram

Schematic Diagram

Electric Control Device

• Heat Pump Model(LED TYPE)


Wiring Diagram

Indoor Unit

Models: 7k, 9k, 12k, 18k, 24k Cooling only Model

GN/YL

WIRING DIAGRAM

CONDUCTIVE

ENCLOSURE

MOTOR ONLY

OR

MOTOR

BK

MAIN PWB ASM.

TRIAC

THERMISTOR

OPTION

PWB ASM.

STEP

MOTOR

BR YL

CN-MOTOR

STEP

MOTOR

SH-CAPA

CN-N1

4 3

BK

BK

H.V.

ASM.

RD

BK

AIR

CLEAN

(PLASMA)

BK

BK S/W1

CN-N2

RY-COMP

FUSE

250V T2A

GN/YL

TERMINAL

BLOCK

DISPLAY

PWB ASM.

TO OUTDOOR UNIT

P/No : 3854A20427C

Schematic Diagram

Models: 7k, 9k, 12k, 18k, 24k Heat pump Model

GN/YL

WIRING DIAGRAM

CONDUCTIVE

ENCLOSURE

MOTOR ONLY

MAIN PWB ASM.

THERMISTOR

TRIAC

OR

MOTOR

BK

OPTION

PWB ASM.

STEP

MOTOR

BR YL

CN-MOTOR

SH-CAPA

STEP

MOTOR

CN-N1

GN/YL

4 3

CN-N2

RY-COMP

FUSE

250V T2A

BK

BK

H.V.

ASM.

RD

BK

AIR

CLEAN

(PLASMA)

BK

BK

S/W1

RY-4WAY

RY-FAN

TERMINAL

BLOCK

CN-4WAY

DISPLAY

PWB ASM.

TO OUTDOOR UNIT

P/No : 3854A20427B

Service Manual 43

Schematic Diagram

Outdoor Unit

Models: 7k, 9k, 12k Cooling only Model

Models: 7k, 9k, 12k Heat pump Model


Models: 18k, 24k Cooling only Model

Schematic Diagram

Models: 18k, 24k Heat pump Model

Models: LS-C1865DM0

Service Manual 45

Schematic Diagram

Components Location

MAIN P.W.B ASSEMBLY

• TOP VIEW

• BOTTOM VIEW


DISPLAY ASSEMBLY

– 6871A20574A

– 6871A20624A

Schematic Diagram

Service Manual 47

Troubleshooting Guide

Troubleshooting Guide

Refrigeration Cycle Diagram

(1) Cooling Only Models

INDOOR UNIT

LIQUID SIDE

OUTDOOR UNIT

CAPILLARY TUBE

HEAT

EXCHANGE

(EVAPORATOR)

HEAT

EXCHANGE

(CONDENSER)

(2) Cooling & Heating Models

INDOOR UNIT

LIQUID SIDE

3-WAY VALVE

HEAT

EXCHANGE

(EVAPORATOR)

GAS SIDE

COMPRESSOR

OUTDOOR UNIT

CHECK VALVE

(Heating Model only)

CAPILLARY TUBE

HEAT

EXCHANGE

(CONDENSER)


GAS SIDE

3-WAY VALVE

ACCUMU

LATOR

COMPRESSOR

REVERSING

VALVE

(Heating Model Only)

COOLING

HEATING

2-way, 3-way Valve

2-way Valve (Liquid Side)


3-way Valve (Gas Side)

Hexagonal wrench (4mm)

Flare nut

Open position

Closed position

To piping connection

To outdoor unit

Flare nut

Valve cap

Open position

Closed position

Pin

To piping connection

Service port cap

To outdoor unit

Service port

Works

Shipping

1.

Air purging

(Installation)

Operation

2.

Pumping down

(Transfering)

3.

Evacuation

(Servicing)

4.

Gas charging

(Servicing)

5.

6.

Pressure check

(Servicing)

Gas releasing

(Servicing)

Shaft position

Closed

(with valve cap)

Open

(counter-clockwise)

Open

(with valve cap)

Closed

(clockwise)

Open

Open

Open

Open

Shaft position

Closed

(with valve cap)

Open

Service port

Closed

(with cap)

Closed

(clockwise)

Open

(with valve cap)

Open

Open

(push-pin or with vacumm pump)

Closed

(with cap)

Open Open

(counter-clockwise) (connected manifold gauge)

Open

(with charging cylinder)

Open Open


Open


Open

Open


Service Manual 49


Pumping Down

Indoor unit

Liquid side

2-Way valve

Open

Gas side

3-Way

Closed valve

Outdoor unit

CLOSE

Purge the air

Lo

CLOSE

• 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 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.

(4) Air purging of the charge hose.

– Open the low-pressure valve on the charge set slightly to air purge from the charge hose.

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

(6) Operate the air conditioner at the cooling cycle and stop it when the gauge indicates

1kg/cm 2 g.

(7) Immediately set the 3-way valve to the closed position.

– Do this quickly so that the gauge ends up indicating 3 to 5kg/cm 2 g.

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

(Gas leakage)

Indoor unit

Liquid side

3-Way valve

Open

Outdoor unit

Gas side

3-Way valve

Open

OPEN

Lo

CLOSE

• 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/cm 2 G.

– If there is no air in the refrigerant cycle (the pressure when the air conditioner is not running is higher than 1 kg/cm 2 G), discharge the refrigerant until the gauge indicates 0.5 to 1 kg/cm 2 G. if this is the case, it will not be necessary to apply a evacuatin.

– Discharge the refrigerant gradually; if it is discharged too suddenly, the refrigeration oil will also be discharged.

Service Manual 51


Evacuation

(All amount of refrigerant leaked)

Indoor unit

Liquid side

3-Way valve

Open

Outdoor unit

Gas side

3-Way valve

Open

Vacuum pump

OPEN

Lo

CLOSE

• 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.



Gas Charging

(After Evacuation)

Indoor unit

Liquid side

3-Way valve

Open Outdoor unit

Charging cylinder

Check valve

Lo

(1)

OPEN

Gas side

3-Way valve

Open

CLOSE

• Procedure

(1) Connect the charge hose to the charging cylinder.

– Connect the charge hose which you dis-connected 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.

(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 specified 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).

\

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 discharged.

– If the system has been charged with liquid refrigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose.

(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 53


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

12

11

10

9

8

7

6

5

5

Operating Suction Pressure (For R401A)

(According to Indoor & Outdoor Temperature)

(At operating the Unit for 10 minutes)

10 15 20 25

Indoor Temp. (˚C)

30 35

50˚C

40˚C

30˚C

20˚C

10˚C

0˚C

40

P = 3 + 0.0123 x T out

1.5

+ 0.8 x T in

0.5

Where, P : Suction Pressure(kg/cm

2

.g)

Tout : Outdoor Temperature(˚C)

Tin : Indoor Temperature(˚C)



Cycle Parts

Trouble analysis

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

Temp. difference : approx. 0°C

Current : less than 80% of rated current

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

Temp. Difference

Temp. difference : approx. 8°C

Current : less than 80% of rated current

• Refrigerant leakege

Clog of refrigeration cycle

Defective compressor

Operating Current

Temp. difference : less than 8°C

Current : over the reated current

• Excessive amount of refrigerant

Temp. difference : over 8°C

• 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

(Compared with

Temperature

(Compared with the normal value) the normal valve)

Cause of Trouble Description

Higher

High

Normal

Defective compressor

Defective 4-way reverse valve

Excessive amount of refrigerant

Current is low.

Lower Higher

Insufficient amount of

Clogging

High pressure does not quickly rise at the beginning of operation.

Current is low.

Current is low.

NOTICE

1. The suction pressure is usually 8.5~9.5 kg/cm 2 G(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 55


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

NO

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

YES

Primarily, the operating condition of Micom is OK.

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 each load(Indoor/Outdoor Fan Motor,

Compressor, Stepping Motor) and contacting condition of related connector

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

Items

• SMPS Transformer

(Indoor unit)

- Input Voltage

- Output Voltage(C03D)

• IC01D(7805) Output

(Indoor/Outdoor unit)

• IC01A(KIA7036, Reset IC)

OSC01B(8MHz)

Main PCB Board Operation Check

Content Remedy

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

- About DC12V

• Replace Trans

• DC +5V

• Replace IC01D

• Voltage of IC No.1,

(DC +4.5V over) and Soldering condition.

• 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.)

Cause by the remote control

Caused by other parts except the remote control

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

Check the contact of CN-DISP1 connector.

Check the connecting circuit between the remote controller

MICOM (No. ) - R16(1.5k) - IR LED - TR - R17(1

Ω).

or

MICOM (No.

61

) - R1(1.5k) - IR LED - TR - R2(1

Ω).

Check Display PCB Assembly

- Voltage between CN DISP1 - : DC +5V

Check point

• Check the connecting circuit between CN-DIS1 -

R11L(100

Ω) - C01A(100nF) - MICOM PIN

• Check Receiver Assembly

Service Manual 57


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 10k

Ω / 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.

COMP ON COMP OFF Check point

Between Micom(No.

59) and GND

Between IC01M(No. 15) and GND

DC5V

Below DC 1V

(app)

DC0V

About DC12V

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.



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)

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

TRIAC is not damaged

About AC 50V over

TRIAC Check

Service Manual 59


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

60

,

61

,

62 and

63 of MICOM

- Between , , and of IC01M

- Between , , and of IC01M

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



When Heating does not operate

Turn ON Main Power

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

10K

Ω/at 25°C).

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

5K

Ω/at 25°C).

Check point

Check the DC voltage on the PWB ASSEMBLY

• The details of check are as followings

• Comp Relay.

Comp ON Comp OFF

• Outdoor fan Relay

Check point Fan ON

Between Micom

(NO.59) and GND

DC 5V

Between IC01M

(NO.15) and GND

Below DC 1V

DC 0V

About DC

12V

Fan OFF

Between Micom

(NO.53) and GND

DC 5V DC 0V

Between IC02M

(NO.12) and GND

Below DC 1V About DC 12V

• 4 way Relay

Check point 4 way ON 4 way OFF

Between Micom

(NO.51) and GND

DC 5V DC 0V

Between IC02M

(NO.11) and GND

Below DC 1V About DC 12V

Service Manual 61


Turn off Main Power

• 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.


Exploded View

Exploded View

Indoor Unit

135312

152302

135301

131410 733010

342800

359011

135311

159901

354210

267110

268712

668713

146811

249951

268714

35211B

346810

135516

266090

264110

263230

Service Manual 63

Exploded View

Outdoor Unit: 7k, 9k, 12k Btu/h Seriess

437210

435301

237205

437212

237204

435511

554031

559010

546810

552116

447910

552202

561410

649950

W0CZZ

552111

552201

552102-1

567502

554160

430410

550140

552203-1

552203-2


Exploded View

Outdoor Unit: 18k , 24k Seriess

435512

559010

546810

554031

552102-1

552102-2

552201

552111

649950

W0CZZ

437212

435511

435301

447910

552202

552116

561410

554160

550140

552203-2

437210

430410

552203-1

Service Manual 65

Replacement Parts List

Replacement Parts List

Parts List (Indoor)

LOCATION

No.

DESCRIPTION

PART No.


131410 CHASSIS ASSEMBLY 3141A20019A 3141A20019A 3141A20019A 3141A20019A

135311 GRILLE ASSEMBLY, DISCHARGE(INDOOR) 3531A10307A 3531A10307A 3531A10307A 3531A10307A

135312 GRILLE ASSEMBLY, FRONT(INDOOR) 3531A14002A 3531A14002A 3531A14002A 3531A14002F

135516 COVER ASSEMBLY, MOTOR

146811 MOTOR ASSEMBLY, STEP

152302 FILTER(MECH), A/C

159901 VANE, HORIZONTAL

249951 CONTROL BOX ASSEMBLY, INDOOR

263230 THERMISTOR ASSEMBLY

264110 POWER CORD ASSEMBLY

267110 REMOTE CONTROLLER ASSEMBLY

268712 PWB(PCB) ASSEMBLY, DISPLAY

268714 PWB(PCB) ASSEMBLY, MAIN

3551A20156A

4681A20055A

5230A20051A

5990A20048A

4995A10157C

3551A20156A

4681A20055A

5230A20051A

5990A20048A

4995A10157A

3551A20156A

4681A20055A

5230A20051A

5990A20048A

4995A10157C

3551A20156A

4681A20055A

5230A20051A

5900A20048A

4995A10157C

6323A20004A 6323A20004A 6323A20004A 6323A20004A

6411A20013E 6411A20013E 6411A20013E 6411A20013E

6711A90032N 6711A90032N 6711A90032N 6711A90032N

6871A20574A 6871A20574A 6871A20574A 6871A20574A

6871A20572C 6871A20572A 6871A20572C 6871A20572C

342800 BEARING

346810 MOTOR ASSEMBLY, INDOOR

35211B TUBE ASSEMBLY, TUBING

354210 EVAPORATOR ASSEMBLY, FIRST

359011 FAN ASSEMBLY, CROSS FLOW

668713 PWB(PCB) ASSEMBLY, SUB

733010 PLATE ASSEMBLY, INSTALL

W0CZZ CAPACITOR, DRAWING

4280A20004B 4280A20004B 4280A20004B 4280A20004B

4681A20151A 4681A20151A 4681A20151B 4681A20151B

5211A21363A 5211A21363A 5211A21363B 5211A21363B

5421A20218A 5421A20218A 5421A20218A 5421A20218A

5901A20017F 5901A20017F 5901A20017F 5901A20017F

6871A20577B 6871A20577A 6871A20577C 6871A20577C

3301A20011A 3301A20011A 3301A20011A 3301A20011A

3H01487K 3H01487K 3H01487K 3H01487K

REMARKS

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

NOTE)

*

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

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




LOCATION

No.

DESCRIPTION

PART No.


REMARKS

131410 CHASSIS ASSEMBLY 3141A20019A 3141A20019A 3141A20019A 3141A20019A

135311 GRILLE ASSEMBLY, DISCHARGE(INDOOR) 3531A10307B 3531A10307B 3531A10307B 3531A10307B

135312 GRILLE ASSEMBLY, FRONT(INDOOR)



3531A14002F

3551A20156A

4681A20055A

3531A14002E

3551A20156A

4681A20055A

3531A14002E

3551A20156A

4681A20055A

3531A14002E

3551A20156A

4681A20055A






5230A20051A

5990A20048A

4995A10157A

6323A20004A

6411A20013E

5230A20051A

5990A20048A

4995A10157D

6323A20004A

6411A20013E

5230A20051A

5990A20048A

4995A10157D

6323A20004A

6411A20013E

5230A20051A

5990A20048A

4995A10157D

6323A20004A

6411A20013E




342800 BEARING








6711A90032L 6711A90032M 6711A90032M 6711A90032M

6871A20574A 6871A20574A 6871A20574A 6871A20574A

6871A20572A 6871A20572C 6871A20572A 6871A20572C

4280A20004B 4280A20004B 4280A20004B 4280A20004B

4681A20151A

3301A20011A

3H01487K

4681A20151A

5211A21363A 5211A21363A 5211A21363A 5211A21363B

5421A20218A 5421A20218A 5421A20218A 5421A20218A

5901A20017F 5901A20017F 5901A20017F 5901A20017F

6871A20577R 6871A20577D 6871A20577E 6871A20577F

3301A20011A

3H01487K

4681A20151A

3301A20011A

3H01487K

4681A20151B

3301A20011A

3H01487K

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

NOTE)

*



Service Manual 67



LOCATION

No.

DESCRIPTION

PART No.

LS-H2665DM0 LS-H1865DM0 AS-H2465DM0 AS-H1865DM0

REMARKS

131410 CHASSIS ASSEMBLY 3141A20020B 3141A20020A 3141A20020B 3141A20020B

135311 GRILLE ASSEMBLY, DISCHARGE(INDOOR) 3531A20252A 3531A20252A 3531A20252A 3531A20252A



3531A20253B

3551A20154B

3531A20253B

3551A20154A

3531A20253A

3551A20154B

3531A20253A

3551A20154A






4681A20055A

5230A20052A

5990A20049A

4995A10168C

6323A20004A

4681A20055A

5230A20052A

5990A20049A

4995A10168A

6323A20004A

4681A20055A

5230A20052A

5990A20049A

4995A10168C

6323A20004A

4681A20055A

5230A20052A

5990A20049A

4995A10168A

6323A20004A





342800 BEARING








6411A20047B 6411A20047A 6411A20047B 6411A20047A

6711A90032N 6711A90032N 6711A90032N 6711A90032N

6871A20624A 6871A20624A 6871A20624A 6871A20624A

6871A20572C 6871A20572C 6871A20572C 6871A20572C

4280A20004A

3301A20002A

3H01487G

4280A20004A

66871A20576B 6871A20576A

3301A20002A

3H01487G

4280A20004A

4681A20067C 4681A20003D 4681A2067C 4681A20003D

5211A21378B 5211A21378A 5211A21378B 5211A21378C

5421A20220A 5421A20220A 5421A20220A 5421A20220A

5901AR2441E 5901A92441E 5901AR2441E 5901AR2441E

6871A20576G

3301A20002A

3H01487G

4280A20004A

6871A20576E

3301A20002A

3H01487G

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

NOTE)

*






LOCATION

No.

DESCRIPTION

131410 CHASSIS ASSEMBLY

135311 GRILLE ASSEMBLY, DISCHARGE(INDOOR)












342800 BEARING








LS-C1865DM0

3141A20020A

3531A20252A

3531A20253D

3551A20154A

4681A20055A

5230A20052A

5990A20049A

4995A10168B

6323A20004A

6411A20047A

6711A90032M

6871A20624A

6871A20572E

4280A20004A

4681A20003D

5211A21378A

5421A20220A

5901AR2441E

6871A20576C

3301A20002A

3H01487G

PART No.

LS-C2665DM0

3141A20020B

3531A20252A

3531A20253D

3551A20154B

4681A20055A

5230A20052A

5990A20049A

4995A10168D

6323A20004A

6411A20047B

6711A90032M

6871A20624A

6871A20572E

4280A20004A

4681A20067C

5211A21378B

5421A20220A

5901AR2441E

6871A20576D

3301A20002A

3H01487G

NOTE)

*



REMARKS

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

Service Manual 69


Parts List (Outdoor)

LOCATION

No.

DESCRIPTION

PART No.


237204 PANEL SIDE

237205 PANEL SIDE

430410 BASE ASSEMBLY, OUTDOOR L/N

435301 GRILLE, DISCHARGE

3720A10238A 3720A10238A 3720A10238A 3720A10238A

3720A10239A 3720A10239A 3720A10239A 3720A10239A

3041A20072C 3041A20072D 3041A20072D 3041A20072D

3530A10250B 3530A10250B 3530A10250B 3530A10250B

435511 COVER ASSY, CONTROL(OUTDOOR) 3551A30136A 3551A30136A 3551A30136A 3551A30136A

437210 PANEL ASSEMBLY, FRONT(OUTDOOR) 3721A10153B 3721A10153B 3721A10153B 3721A10153B

437212 GRILLE, REAR

447910 BARRIER ASSY, OUTDOOR

3530A10251B

4790A10057B

3530A10251B

4790A10057B

3530A10251B

4790A10057B

3530A10251B

4790A10057B

546810 MOTOR ASSEMBLY, OUTDOOR

550140 ISOLATOR, COMP

552102-1 TUBE, CAPILLARY BEND

4681A20121D 4681A20121D 4681A20121D 4681A20121D

4H00982E 4H00982E 4H00982E 4H00982E

5210A21146Y 5210A21146S 5210A21146V 5210A23613A


552111 TUBE ASSEMBLY, CAPILLARY

552116 TUBE ASSEMBLY, REVERSING

552201 VALVE, CHECK

552202 VALVE, REVERSING

552203-1 VALVE, SERVICE


554031 CONDENSER ASSEMBLY, BENT

554160 COMPRESSOR SET

559010 FAN ASSEMBLY, PROPELLER

5210A21146X

5211A30708E

5211A20188W

5220AR7182A

5210A21146T

5211A30708C

5211A20188V

3H01552F

5210A21146W

5211A30708D

5211A29021B

3H01552F

5210A23613B

5211A10197Y

5211A29021C

3H01552F

5220AR3228J 5220AR3228J 5220AR3228D 5220AR3084E

5220A20005B 5220A20005B 5220A20005B 5220A20005B

5220A20001S 5220A20001S 5220A20006J 2H01890P

5403A20198M 5403A20197H 5403A20197H 5403A20199F

2520UZBP2BA 2520UGAKP2AA 2520UGEP2AA 2520UKMP2BA

5901A10055A 5901A10055A 5901A10055A 5901A10055A

561410 COIL ASSEMBLY, REVERSING VALVE

567502 O.L.P

6141A20017A 6141A20017A 6141A20017A 3A02028Y

6750U3L023A 6750U-L040A 6750U-L077A 6750U-L027A

649950 CONTROL BOX ASSEMBLY, OUTDOOR 4995A20441E 4995A20441A 4995A20441A 4995A90144A

W0CZZ CAPACITOR, DRAWING 6120AR2194H 2H01451T 2H01451T 2H01451T

REMARKS

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

NOTE)

*






LOCATION

No.

DESCRIPTION

237204 PANEL SIDE

237205 PANEL SIDE

430411 BASE ASSEMBLY, OUTDOOR


435511 COVER ASSY, CONTROL(OUTDOOR)

437210 PANEL ASSEMBLY, FRONT(OUTDOOR)

437212 GRILLE, REAR

447910 BARRIER ASSY, OUTDOOR






552201 VALVE, CHECK








567502 O.L.P

649950 CONTROL BOX ASSEMBLY, OUTDOOR


5211A20188Y

-

5220AR3228J

5220A20005B

2A00393X

5403A20198M

5417A20012C

5901A10055A

6141AR3733R

6750A30001C

4995A20441C

2H01451P

PART No.


3720A10238A

3720A10239A

3041A20072D

3530A10250B

3720A10238A

3720A10239A

3041A20072A

3530A10250B

3720A10238A

3720A10239A

3041A20072B

3530A10250B

3720A10238A

3720A10239A

3041A20072B

3530A10250B

3551A30136A

3721A10153B

3530A10251B

4790A10057B

4681A20121D

4H00982E

5210A30041A

5211A21143K

3551A30136A

3721A10153B

3530A10251B

4790A10057B

4681A20121D

4H00982E

-

5211A21143L

3551A30136A

3721A10153B

3530A10251B

4790A10057B

4681A20121D

4H00982E

-

5211A10197Z

3551A30136A

3721A10153B

3530A10251B

4790A10057B

4681A20121D

4H00982E

-

5211A30708G

-

-

-

5220A20005B

5220A20001S

5403A20198M

2520UZBP2BA

5901A10055A

-

6750U3L023A

4995A20441F

6120AR2164H

5220A20005B

5220A20001S

5403A20199H

2520UGAP2GA

5901A10055A

-

-

-

-

6750U-L061A

4995A20441D

2H01451P

5220A20005B

5220A20006J

5403A20197H

2520UGHP2AA

5901A10055A

-

-

-

-

6750U-L076A

4995A20441B

2H01451T

REMARKS

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

NOTE)

*



Service Manual 71



LOCATION

No.

DESCRIPTION

430410 BASE ASSEMBLY, WELD[OUTDOOR]


435511 COVER ASSY, CONTROL(OUTDOOR)

435512 COVER ASSEMBLY, TOP(OUTDOOR)

437210 PANEL ASSEMBLY, FRONT(OUTDOOR)

437212 PANEL ASSY, REAR

447910 BARRIER ASSEMBLY, OUTDOOR



550140 GROMMET





552201 VALVE, CHECK










AS-H2465DM0

3041A30003F

3530A20007B

3551A30007X

3H03266K

3721A20005H

3720AP0003D

2H02110M

4681A20013D

4H00982E

-

5210A30216P

-

5211A10039F

5211A20529H

5220A30004A

5220AR3228C

5220A20001R

5220A20013A

5403A20022R

2520UXFP2AA

1A00195B

3A02028Y

4995A10002L

2A00986Y

PART No.

LS-C1865DM0

3041A10045B

1H00840C

551A20030C

3H03465D

2H02674V

1H00967M

4791AR7047A

4681A20126A

-

4022U-L005A

5210A31405B

-

5211A20291H

-

-

-

2H02200E

2H01890R

5403A20072M

2520UHCP2CA

5900AR1119B

-

4781AR1459M

0CZZA20007P

NOTE)

*



REMARKS

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R




LOCATION

No.

DESCRIPTION

430410 BASE ASSEMBLY, WELD[OUTDOOR]


LS-H1865DM0

3041A10027A

3530A20007J

435511 COVER ASSEMBLY, CONTROL[OUTDOOR] 3551A30079N

437210 PANEL ASSEMBLY, FRONT[OUTDOOR] 3721A20113A

437212 PANEL ASSEMBLY, REAR

447910 BARRIER ASSEMBLY, OUTDOOR


550140 GROMMET

3721A20114F

4791A20023C

4681A20028P

4022U-L005A

552102 TUBE CAPILLARY BEND






554160 COMPRESSOR





5210A31655A

5211A20270J

3A02027G

5220A20005B

2H01890P

5403A20205A

2520UHFP2EA

5901A10032A

3A02028Y

4995A20261R

0CZZA10001A

PART No.

LS-H2665DM0

3041A10027A

3530A20007J

3551A30079N

3721A20113A

3721A20114F

4791A20023C

4681A20028P

4022U-L005A

5210A31655B

5211A20270L

3A02027G

5220A20002C

2A00392E

5403A20164E

2520UHPP2AB

5901A10032B

AS-H1865DM0

3041A10027A

3530A20007J

3551A30079N

3721A20113A

3721A20114F

4791A20023C

4681A20028P

4022U-L005A

5210A31442K/L

5211A20270K

5220AR3228E

5220A20006J

5220A20005B

5403A20164E

LS-C2665DM0

3041A10027A

3530A20007J

3551A30079M

3721A20113A

3721A20114F

4791A20023A

4681A20028P

4022U-L005A

5210A20595X

-

-

5220A20002C

2A00392E

5403A20164B

2520UTFP2EA 2520UHMP2BA

5901A10032A 5901A10032B

3A02028Y

4995A20261R

0CZZA10001A

3A02028Y

4995A00006B

2A00086Y

-

4995A20261Q

0CZZA10001A

REMARKS

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

NOTE)

*



Service Manual 73

P/No.: 3828A20462E

November, 2004

Printed in Korea

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