LG Room Air Conditioner

LG

Room

Air Conditioner

SERVICE MANUAL

MODELS: AS-H076PB/D/ML2

AS-H096PB/D/ML2

AS-H126PA/B/D/M/S/WL2

AS-H096P*L3

AS-H126P*L3

AS-H076P*L3

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..........................................................................................................................................4

Dimensions .....................................................................................................................................................8

Symbols used in this Manual......................................................................................................................8

Indoor Unit..................................................................................................................................................8

Outdoor Unit ...............................................................................................................................................9

Installation .....................................................................................................................................................11

Select the Best Location .........................................................................................................................11

Piping Length and Elevation.....................................................................................................................11

Preparing Work for Installation .................................................................................................................12

Fixing the Indoor Unit ...............................................................................................................................13

Drill a Hole in the wall...............................................................................................................................13

Flaring Work .............................................................................................................................................14

Connecting the Pipings ............................................................................................................................15

Connecting the Cables to the Indoor Unit ................................................................................................18

Connecting the Cables to the Outdoor Unit..............................................................................................19

Checking the Drainage.............................................................................................................................20

Forming the Piping ...................................................................................................................................20

Air Purging ...............................................................................................................................................21

Air Purging with Vacuum Pump................................................................................................................21

Front Panel Assembly ..............................................................................................................................23

Test Running ............................................................................................................................................24

Operation ......................................................................................................................................................25

Function of Controls .................................................................................................................................25

Display Function.......................................................................................................................................32

Self-diagnosis Function ............................................................................................................................33

Remote Control Operations......................................................................................................................34

Disassembly ..................................................................................................................................................35

Indoor Unit................................................................................................................................................35

Troubleshooting Guide .................................................................................................................................37

Refrigeration Cycle Diagram ....................................................................................................................37

2-way, 3-way Valve ...................................................................................................................................38

Cycle Parts ...............................................................................................................................................43

Electronic Parts ........................................................................................................................................44

Schematic Diagram.......................................................................................................................................51

Electric control Device..............................................................................................................................51

Wiring Diagram.........................................................................................................................................52

Components Location ..............................................................................................................................53

Product Specifications ................................................................................................................................55

Exploded View ..............................................................................................................................................56

Indoor Unit...............................................................................................................................................56

Outdoor Unit ............................................................................................................................................57

Replacement Parts List ................................................................................................................................59

Indoor ......................................................................................................................................................59

Outdoor ....................................................................................................................................................60

2 Room Air Conditioner

LG Model Name

2003~

1 2 3 4 5 6 7 8 9 10

Code

1

2

3

4, 5

6

7

8

9

10

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

Meaning

L: Chang-won R22 N: India

A: Chang-won R410A Z: Brazil

C: Chang-won R407C D: Indonesia

T: China X: Mexico

U: China R410A

V: Vietnam

K: Turkey R22

E: Turkey R410A

S: Out Sourcing H: Thailand

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

Name of Chassis of Unit

Ex. LSP

→

SP Chassis

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

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+Oxy generator

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

Dry Contact

Wired Remocon

LG Model Development Serial No.

* ARTCOOL COLOR

R

W

B

D

M

C

Mirror

White

Blue

Wood

Metal

Cherry

N

A

S

Q

K

Walnut

Gogh

Sisley

Quran

Mecca

T

U

V

W

8

N

P

Q

K

L

M

R

S

H

I

J

E

F

G

A

B

C

D

Service Manual 3

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

Always perform grounding.

• Otherwise, it may cause electrical shock.

Don’t use a power cord, a plug or a loose socket which is damaged.

• Otherwise, it may cause a fire or electrical shock.

For installation of the product, always contact the service center or a professional installation agency.

• Otherwise, it may cause a fire, electrical shock, explosion or injury.

Securely attach the electrical part cover to the indoor unit and the service panel to the outdoor unit.

• If the electrical part cover of the indoor unit and the service panel of the outdoor unit are not attached securely, it could result in a fire or electric shock due to dust, water, etc.

Always install an air leakage breaker and a dedicated switching board.

• No installation may cause a fire and electrical shock.

Do not keep or use flammable gases or combustibles near the air conditioner.

• Otherwise, it may cause a fire or the failure of product.

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Safety Precautions

Ensure that an installation frame of the outdoor unit is not damaged due to use for a long time.

• It may cause injury or an accident.

Do not disassemble or repair the product randomly.

Do not install the product at a place that ther is concern of falling down.

• It will cause a fire or electrical shock.

• Otherwise, it may result in personal injury.

Use caution when unpacking and installing.

■

Operation

Do not share the outlet with other appliances.

• Sharp edges may cause injury.

• It will cause an electric shock or a fire due to heat generation.

Do not use the damaged power cord.


Do not modify or extend the power cord randomly.


Take care so that the power cord may not be pulled during operation.


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

• Otherwise, it may cause electrical shock or a fire.

Service Manual 5


Keep the flames away.

• Otherwise, it may cause a fire.

Take the power plug out if necessary, holding the head of the plug and do not touch it with wet hands.


Do not use the power cord near the heating tools.

• Otherwise, it may cause a fire and electrical shock.

Do not open the suction inlet of the indoor/outdoor unit during operation.

• Otherwise, it may electrical shock and failure.

Do not allow water to run into electrical parts.

Never touch the metal parts of the unit when removing the filter.

• Otherwise, it may cause the failure of machine or electrical shock.

• They are sharp and may cause injury.

Do not step on the indoor/outdoor unit and do not put anything on it.

• It may cause an injury through dropping of the unit or falling down.

Do not place a heavy object on the power cord.


When the product is submerged into water, always contact the service center.


Take care so that children may not step on the outdoor unit.

• Otherwise, children may be seriously injured due to falling down.



■

Installation

Install the drain hose to ensure that drain can be securely done.

• Otherwise, it may cause water leakage.

Install the product so that the noise or hot wind from the outdoor unit may not cause any damage to the neighbors.

• Otherwise, it may cause dispute with the neighbors.

Always inspect gas leakage after the installation and repair of product.

• Otherwise, it may cause the failure of product.

Keep level parallel in installing the product.

• Otherwise, it may cause vibration or water leakage.

■

Operation

Avoid excessive cooling and perform ventilation sometimes.

• Otherwise, it may do harm to your health.

Use a soft cloth to clean. Do not use wax, thinner, or a strong detergent.

When gas leaks, open the window for ventilation before operating the unit.

• The appearance of the air conditioner may deteriorate, change color, or develop surface flaws.

• Otherwise, it may cause explosion, and a fire.

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Service Manual 7

Dimensions

Dimensions

Symbols used in this Manual

This symbol alerts you to the risk of electric shock.

NOTICE

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

This symbol indicates special notes.

Indoor Unit

Hanger Hole

W D

H

Fix Hole

Pipe Hole

Dimension

W

H

D

Model mm mm mm


INDOOR UNIT

570

568

137

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 Models

73

392

35

100

575

525

260

301

Service Manual 9

Dimensions

L1

L2

L3

L4

L5

DIM

W

H

D

MODEL unit mm mm mm mm mm mm mm mm


W

L2

L3

Gas side

(3-way valve)

Liquid side

(2-way valve)

9K, 12K Models

64

518

10

100

770

540

245

285

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 50cm. The unit should be installed as high on the wall as possible, allowing a minimum of 10cm from ceiling.

• Use a stud finder to locate studs to prevent unnecessary damage to the wall.

More than 10cm

More than 50cm

More than 10cm

More than 70cm

More than 60cm

More than 10cm

More than 60cm

Piping Length and Elevation

Capacity

(Btu/h)

5k~14k

18k~28k

30k~38k

Pipe Size

GAS LIQUID

3/8"(Ø9.52) 1/4"(Ø6.35)

1/2"(Ø12.7) 1/4"(Ø6.35)

1/2"(Ø12.7) 1/4"(Ø6.35)

5/8"(Ø15.88) 1/4"(Ø6.35)

5/8"(Ø15.88) 3/8"(Ø9.52)

5/8"(Ø15.88) 3/8"(Ø9.52)

3/4"(Ø19.05) 3/8"(Ø9.52)

Standard

Length

(m)

4 or 7.5

4 or 7.5

4 or 7.5

4 or 7.5

4 or 7.5

7.5

7.5

Max.

Elevation

B

(m)

15

15

15

15

15

7

7

Max.

Length

A

(m)

30

30

30

15

15

30

30

Additional

Refrigerant

(g/m)

30

30

50

20

20

20

20

More than 50cm

More than 2m

CAUTION:

Install the indoor unit on the wall where the height from the floor is more than 2 meter.

Outdoor unit

Indoor unit

A

B

Indoor unit

B

A

Outdoor unit

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.

Outdoor unit

Oil trap

Indoor unit

A

B

If the piping length is more than 5m

CAUTION:

•

Capacity is based on standard length and maximum allowance length is on the basis of reliability.

•

Oil trap should be installed every 5~7 meters.

I

Service Manual 11

Installation

Preparing Work for Installation

Open front panel

1. Push the front panel backward and lift it up to remove the two screws.

2. As soon as you lift the both lower parts of panel front, you can hear the sound from panel front. At this moment panel front is separated

3. After pulling down this panel a bit, separate connecting wire from the product.

Panel Front

Connector

Remove pipe cover and side cover

1. Remove two screws(for fixing pipe cover)

2. Pull up the side cover of desired connecting direction, and then side cover is separated.

3. Pick the pipe hole of the side cover.

CAUTION: After removing the pipe hole, cut the burr for safety.

NOTICE

When making pipe path through rear wall, you don’t need to pick the pipe hole.

Pipe hole

Side cover

Drain hose junction

1. Remove the rubber stopple in the desired drain direction.

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

Adhesive

Drain hose

Connecting part

Only the desired direction rubber cap


Installation

Fixing the Indoor Unit

1. Attach an Installation guide map on the desired surface.

INSTALLATION GUIDE MAP

6. Look at suited horizon by horizontal meter on the horizontal setting line, and fix lightly the map by adhesive tape.

Horizontality

INS

TA

LL

AT

IO

N G

UID

E M

AP

2. Make a hole with a diameter of 6mm and depth of 30-35mm by piercing a screw point.

INST

AIIA

TION GUIDE MAP

7. Drill the pierted part as a diameter of 50mm for connecting piping. (In case of piercing rear surface)

3. Drive the fore plastic anchors into drilled points.

INS

TA

LLA

TIO

N G

UIDE

M

AP

8. First, Drive the two points of the upper parts by screws. (Leave 10mm for hanging the product)

INST

10m m

ALLA

TION GU

Plastic anchors

4. Hang the hole of product at the upper screws, and remove the map. (Falling attention)

INSTA

LLAT

ION G

UIDE

MAP

Hanger hole

(Rear side of the product)

9. Drive the lower parts after facing the hole of product with plastic anchors, and fix completely the upper screws.

Plastic anchors

5. Check the fixed product with light power.

10. In case of nothing wrong, connect the pipe and the wire. (Refer to installation manual)

Drill a Hole in the Wall

• Drill the piping hole with a ø50mm hole core drill.

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

Indoor

WALL

Outdoor

Service Manual 13

Installation

Flaring Work

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

Cutting the pipes and the cable.

1. Use the piping kit accessory or the pipes purchased locally.

2. Measure the distance between the indoor and the outdoor unit.

3. Cut the pipes a little longer than measured distance.

4. Cut the cable 1.5m longer than the pipe length.

Copper pipe

90

°

Slanted Uneven Rough

Removing burrs

1. Completely remove all burrs from the cut cross section of pipe/tube.

2. 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.

Point down

Pipe

Reamer

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)

Copper tube

Flare nut

Flaring work

1. Firmly hold copper pipe in a die in the dimension shown in the table below.

2. Carry out flaring work with the flaring tool.

Outside diameter mm

Ø6.35

Ø9.52

Ø12.7

Ø15.88

Ø19.05

inch

1/4

3/8

1/2

5/8

3/4

A mm

0~0.5

0~0.5

0~0.5

0~1.0

1.0~1.3

Bar

Bar

Handle

Yoke

Cone

Copper pipe

Clamp handle

Red arrow mark


Check

1. Compare the flared work with the figure by.

2. If a flared section is defective, cut it off and do flaring work again.

Installation

Smooth all round

Inside is shiny without scratches

= Improper flaring =

Even length all round

Inclined Surface damaged

Cracked Uneven thickness

Connecting the Pipings

Indoor

Preparing the indoor unit's piping and drain hose for installation through the wall.

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

Drain hose

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 cable

Drain hose

Loop

Gas side piping

Liquid side piping

NOTICE

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.

Service Manual 15

Installation

Connecting the pipings with the indoor unit and drain hose with drain pipe

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

2. Tighten the flare nut with a 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

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

Indoor unit tubing Flare nut Pipes

Wrench

Indoor unit tubing

Open-end wrench (fixed)

Flare nut

Connection pipe

Drain hose

Wrap the insulation material around the connecting portion.

1. Overlap the connection pipe insulation material and the indoor unit pipe insulation material. Bind them together with vinyl tape so that there may be no gap.

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

Indoor unit drain hose

Adhesive

Vinyl tape (narrow)

Plastic bands

Insulation material

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

Connection pipe

Vinyl tape

(wide)

Wrap with vinyl tape

Connecting cable

Indoor unit pipe

Pipe

Vinyl tape(narrow)

Wrap with vinyl tape

Pipe

Vinyl tape(wide)

Drain hose


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

Installation

Service Manual 17

Installation

Connecting the Cables to the Indoor Unit.

• Connect the cables to the indoor unit by connecting the wires to the terminals on the control board

dividually 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.)

• Before connecting the cables to the terminal block, remove the cables in the holder of the control cover and do it.

CAUTION:

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

• The earth wire should be longer than the common wires.

• When installing, refer to the circuit diagram behind the panel front of the indoor unit.

• Connect the wires firmly so that they may not be pulled out easily.

• Connect the wires according to color codes, referring to the wiring diagram.

CAUTION: If a power plug is not used, provide a circuit breaker between power source and the unit as shown by.

Main power source

Air

Conditioner

Circuit Breaker

Use a circuit breake or time delay fuse.

CAUTION: The power cord connected to the "A" unit should be selected according to the following specifications(Type "B" approved by HAR or SAA).

(mm 2 )

Grade

NORMAL CROSS

-SECTIONAL AREA

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

Unit(A)

0.75

Indoor

1.0

Indoor

1.5

Indoor

2.5

2.5

5.5

Indoor Outdoor Outdoor

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

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

NORMAL

CROSS-SECTIONAL

AREA 0.75mm

2

(mm 2 )

NORMAL

CROSS

-SECTIONAL

AREA

5k~12K

1.0

Grade

14k~18k

1.5

24k~28k

2.5

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

(mm 2 )

Grade

NORMAL CROSS

-SECTIONAL AREA

30k, 32k 36k, 38k

0.75

0.75

Cable Type(B) H07RN-F H07RN-F


Installation

Connecting the Cables to the Outdoor Unit

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

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

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

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

4. 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

Connecting cable

Connecting cable

Outdoor Unit

Terminal block

Over 5mm

Cover control

CAUTION: 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 18)

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

8) The following would be caused by voltage drop.

• Vibration of a magnetic switch, which will damage the contact point, fuse breaking, disturbance of the normal function of the overload.

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

Service Manual 19

Installation

Checking the Drainage

1. Checking 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.

Forming the Piping

1. 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.

2. 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

2. Drain piping

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

Downward slope

• Do not make drain piping like the following.

Water leakage

Do not raise

Accumulated drain water

Air

Water leakage

Waving

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

3. 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

Less than

50mm gap

Trap

Tip of drain hose dipped in water

Water leakage

Ditch


Installation

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 refrigerant system must be leak tested and evacuated to remove any noncondensables and moisture from the system.

Air Purging with Vacuum Pump

1. Preparation

• Check that each tube(both liquid and gas side tubes) between the indoor and outdoor units have been properly connected and all wiring for the test run has been completed. Remove the service valve caps from both the gas and the liquid side on the outdoor unit. Note that both the liquid and the gas side service valves on the outdoor unit are kept closed at this stage.

2. Leak test

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

• 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

Charge hose

CAUTION:

Be sure to use a manifold valve for air purging. If it is not available, use a stop valve for this purpose. The "Hi" knob of the manifold

valve must always be kept close.

• Pressurize the system to no more than 150

P.S.I.G. with dry nitrogen gas and close the cylinder valve when the gauge reading reached 150

P.S.I.G. Next, test for leaks with liquid soap.

CAUTION:

To avoid nitrogen entering the refrigerant system in a liquid state, the top of the cylinder must be higher than its bottom when you pressurize the system. Usually, the cylinder is used in a vertical standing position.

Nitrogen gas cylinder(in vertical standing position)

Service Manual 21

Installation

Soap water method

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

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

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

3. 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)

10 min. or more if tubing length is longer than 10m

(33 ft)

15 min. or more

• When the desired vacuum is reached, close the

"Lo" knob of the manifold valve and stop the vacuum pump.

4. 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 counterclockwise 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.


Indoor unit

Gas side

Liquid side

Hexagonal wrench

Cap

Outdoor unit

Pressure gauge

Manifold valve

Lo Hi

Open Close

Vacuum pump

Front Panel Assembly

1. First, Check the side cover assembly exactly, and fix the power cord in the bottom groove of cover side left.

2. Assemble connecting lead wire with controller, fix the upper part of the front panel, and match the lower part of the front panel.

Panel Front

Connector

3. Screw up the front panel, and suspend the hook of the front panel in the groove.

RInstallation

Service Manual 23

RInstallation

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.

Prepare remote controller

1. Remove the battery cover by pulling it according to the arrow direction.

2. Insert new batteries making sure that the (+) and (–) of battery are installed correctly.

3. Reattach the cover by pushing it back into position.

NOTICE

• Use 2 AAA(1.5volt) batteries. Do not use rechargeable batteries.

• Remove the batteries from the remote control if the system is not going to be used for a long time.

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 antivibration 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).


Discharge air

Intake temperature

Discharge temperature

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

Refrigerant

R-22

R-410A

Outside ambient

TEMP.

35°C (95°F)

35°C (95°F)

The pressure of the gas side service valve.

4~5kg/cm 2 G(56.8~71.0 P.S.I.G.)

8.5~9.5kg/cm 2 G(120~135 P.S.I.G.)

NOTICE

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

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.

Operation

Operation

Function of Controls

DISPLAY

1) C/O Model (high quality LCD remote controller supplied)

Operation Indicator

• On while in appliance operation, off while in appliance pause

Timer(on/off) and Sleep timer Indicator

• On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled.

Comp. Running Indicator

• While in appliance operation, on while in outdoor unit compressor running, off while in compressor off

Plasma Indicator

• On while in plasma mode, off while plasma mode is canceled.

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.

If your want to use this operation, press the Auto Restart Button.

Power(Forced Operation)

• Operation starts, when this button is pressed and stops when you press the button again.

2) H/P Model (high quality LCD remote controller supplied)


• On while in appliance operation, off while in appliance pause

Timer(on/off) and Sleep timer Indicator

• On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled

Defrost Indicator

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

Plasma Indicator

• On while in plasma mode, off while plasma mode is canceled.

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.

If your want to use this operation, press the Auto Restart Button.

Power(Forced Operation)

• Operation starts, when this button is pressed and stops when you press the button again.

■

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 controller. While in compressor not running, operating with the low airflow speed regardless of the setting.

Service Manual 25

Operation

■

Healthy Dehumidification Mode

• When the dehumidification operation input by the remote controller 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

• 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°Cabove the setting temp, the compressor is turned off. When below 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 26®¨C , when above 28°C , it operates with the low or setting airflow speed (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 outdoor unit from freezing, reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit.

• Defrost control is available 30 minutes later since heating mode operation started, and it will not prolong over 6 minutes.

• Deicing starts only when the outdoor pipe temperature falls below -6°C after 30 minutes passed from starting of heating operating and more than 10 minutes operation of compressor.

• Deicing ends after 6 minutes passed from starting of deice operation or when the outdoor pipe temperature rises over 12°C even if before 6 minutes.

■

Fuzzy Operation (C/O Model)

• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.

Compressor ON Temp => Setting Temp+0.5°C

Compressor OFF Temp => Setting Temp+0.5°C

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time.


Operation

26°C

≤


24°C

≤

Intake Air Temp<26°C => Intake Air Temp+1°C

22°C

≤

Intake Air Temp<24°C => Intake Air Temp+0.5°C

18°C

≤

Intake Air Temp<22°C => Intake Air Temp

Intake Air Temp<18°C => 18°C

• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the

Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule.

• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature

■

Fuzzy Operation (H/P Model)

• When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since the operation off, the operation mode is selected.

• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and only the indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake air temp at that moment as follows.

24°C

≤

Inatake Air Temp => Fuzzy Operation for Cooling

21°C

≤

Inatake Air Temp<24°C => Fuzzy Operation for Dehumidification

Inatake Air Temp<21°C => Fuzzy Operation for Heating

• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10 sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated.

1) Fuzzy Operation for Cooling

• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.




26°C

≤


24°C

≤


22°C

≤


18°C

≤





• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature.

2) Fuzzy Operation for Dehumidification

• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.



Service Manual 27

Operation


26°C

≤


24°C

≤


22°C

≤


18°C

≤





• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as in dehumidification operation.

3) Fuzzy Operation for Heating

• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 3°C or more above the setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on.

Compressor ON Temp => Setting Temp

Compressor OFF Temp => Setting Temp + 3°C


20°C

≤

Intake Air Temp => Intake Air Temp + 0.5°C




• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to the intake air temperature and the setting temperature.

■

Airflow Speed Selection

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

■

On-Timer Operation

• When the set time is reached after the time is input by the remote controller, the appliance starts to operate.

• The timer LED is on when the on-timer is input. It is off when the time set by the timer is reached.

• If the appliance is operating at the time set by the timer, the operation continues.

■

Off-Timer Operation

• When the set time is reached after the time is input by the remote controller, the appliance stops operating.

• The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached.

• If the appliance is on pause at the time set by the timer, the pause continues.


Operation

■

Off-Timer <=> On-Timer Operation

• When the set time is reached after the on/off time is input by the remote controller, the on/off-timer operation is carried out according to the set time.

■

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 controller 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 Swing Mode

• By the Chaos Swing key input, the vane automatically operates with the Chaos Swing or they are fixed to the desired direction.

■

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.

• During the JET COOL function at any moment, the A/C starts to blow the cool air with side louvers closed at extremely high speed for 30 minutes setting the room temp. automatically to 18°C.

■

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.

• During the JET HEAT function at any moment, the A/C starts to blow the hot air with side louvers closed at extremely high speed for 60 minutes setting the room temp. automatically to 30°C.

■

Auto Restarting Operation

• When the power is restored after a sudden power failure while in appliance operation, the mode before the power failure is kept on the memory and the appliance automatically operates in the mode on the memory.

• Operation Mode that is kept on the memory

- State of Operation ON/OFF

Service Manual 29

Operation

- Operation Mode/Setting Temp/Selected Airflow Speed

- Sleep Timer Mode/Remaining Time of Sleep Timer (unit of hour)

■

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.

■

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, Press and hold ON/OFF button 3~5 seconds, then the buzzer sound 1 "beep".

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

■

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.

• When a key is input by the remote control while the slide switch on the main unit of the appliance is on the forced operation position, the error sound "beep-beep-beep-beep-beep-" is made 10 times to indicate that the remote control signal cannot be received.


Operation

■

Air Cleaner Operation

• When an air cleaner function is selected during Air Conditioner operation

- Plasma air cleaner function will be operated while in any operation mode with selecting the function.

- The function is to be stopped while it is operating with selecting the function.

• When an air cleaner function is selected during operation off

- The function will be only operated.

• When inlet grille of air conditioner is opened during plasma operation, High Voltage Generator(H.V.B) is to be stopped. When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B) will be operated again.

Service Manual 31

Operation

Display Function

1. Heating Model


• Cooling, Soft Dry, Fan, Heating

Sleep Timer Indicator

• Sleep Mode

Timer Indicator

• Timer Mode

Defrost Indicator

• Hot-start, Defrost

PLASMA Indicator

• PLASMA Mode

2. Cooling Model


• Cooling, Soft Dry, Fan

Sleep Timer Indicator

• Sleep Mode

Timer Indicator

• Timer Mode

Outdoor Unit Operation

PLASMA Indicator

• PLASMA Mode


Operation

Self-diagnosis Function

Error

Code

1

Error Display LED

(Indoor body operation LED)

(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 33

5

6

4

2

7

11

8

13

15

Operation

Remote Control Operations

The controls will look like the following.

Controls

Signal transmitter

ON

CANCEL

OFF

SET

AUTO CLEAN

Flip-up door

(opened)

Operation Mode

Cooling Operation

Auto Operation or Auto Changeover

Healthy Dehumidification Operation

Heating Operation

• Cooling Model( ), Heat Pump Model( )

1

3

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/HEATING(OPTIONAL)

Used to start or stop the speed cooling. (Speed cooling/heating operates at super high fan speed in cooling/heating 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. NANO PLASMA(OPTIONAL)

Used to start or stop the plasma-purification function.

14. HORIZONTAL AIRFLOW DIRECTION CONTROL

BUTTON

(OPTIONAL)

Used to set the desired horizontal airflow direction.

15. RESET BUTTON

Used prior to resetting time or after replacing batteries.

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

WARNING: Disconnect the unit from power supply before making any checks. Be sure the power switch is set to "OFF"

1. To remove the Grille from the Chassis.

- Pull the grille bottom, the remove 2 securing screws.

- Lift the both lower parts of panel front.

- After pull down this panel a bit, separate connecting wire with product.

2. To remove the Control Box.

- Before removing the control box, be sure to disconnect the wires from PWB.

- Pull the cover control out from the control box and disconnect other wires.

- Remove securing screws.

- Pull the control box out from the chassis carefully.

Panel Front

Connector

Step Motor Connectors

Sensor Connector

4Way/Fan Connector

Comp Connector

Power Connector

Power Connector

Comp Connector

Motor

Connector

Service Manual 35

Disassembly

3. To remove the Evaporator.

- Remove 4 screws securing the evaporator.

- Pull the evaporator out from the chassis carefully.

4. Before removing the Turbo Fan.

- Remove the securing screws from the chassis.

- Pull the pipe cover, top cover and the air guide.

Top Cover

Air Guide

Pipe Cover

5. To remove the Motor.

- Remove the securing bolt from the motor shaft.

- Pull the fan out from the motor shaft.

- Remove 4 screws securing motor mount from the chassis and lift up the motor mount and the bracket.

Turbo Fan

Bracket

Bolt Motor Mount


Troubleshooting Guide

Refrigeration Cycle Diagram

(1) Cooling Only Models

INDOOR UNIT

LIQUID SIDE

OUTDOOR UNIT

CAPILLARY TUBE

Troubleshooting Guide

HEAT

EXCHANGE

(EVAPORATOR)

HEAT

EXCHANGE

(CONDENSER)

GAS SIDE

(2) Cooling & Heating Models

INDOOR UNIT

LIQUID SIDE

3-WAY VALVE

HEAT

EXCHANGE

(EVAPORATOR)

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

Service Manual 37


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



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.

Service Manual 39


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.



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.

Service Manual 41


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.


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

Higher

High

Normal

Defective compressor

Defective 4-way reverse valve

Excessive amount of refrigerant

Description

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 4.5~6.0 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 43


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(ZNR01N)

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-POWER1, 2

• Connector related to CN-MOTOR

• Connector contacting of Outdoor Fan/Compressor

• Display PWB Assembly Check

Items

• SMPS Transformer

(Indoor unit)

- Input Voltage

- Output Voltage

• IC04D(7805) Output

• IC01A(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 IC04D

• Voltage of Micom No. 36,

(DC +4.5V over) and Soldering condition.

• Replace faulty parts


The product does 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-D1, 2 connector.

Check the connecting circuit between the remote controller

MICOM (No.

30

) - R17(2

Ω

) - IR LED - TR - R16(2.2K

Ω

).

Check Display PWB Assembly

- Voltage between CN-D2 - : DC +5V

Check point

• Check the connecting circuit between PIN -

R02L(1K) - C01L(680PF) - MICOM PIN

43

• Check Receiver Assembly

Service Manual 45


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 R02H(12.1k), R04H(6.2k), Micom Pin

26

,

27

• 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.

63) and GND

Between IC02M(No. 14) 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-MOTOR1, 2

Check the Fan Motor

Check the Fuse(AC250V/3.15A)

- Check PWM signal from Micom Pin 50

- Check On/Off signal from micom pin14.

- Check Voltage of CN-Motor 1, 2

(pin ~ is about 15V)

Turn ON Main Power

Fan can't operate for dehumidifying mode.

- Change operation for cooling mode.


Service Manual 47


When Louvers do not operate.

• Confirm that the Louver is normally geared with the shaft of Stepping

Motor.

• If the regular torque is detected when rotating the Louver with hands

Normal

• Check the connecting condition of CN-UD, LR1, LR2 Connector.

• Check the soldering condition(on PWB) of CN-UD LR1, LR2 Connector.

Check the operating circuit of the Louvers.

• Confirm that there is DC +12V between pin of CN-UD and GND.

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

- Between

45

,

46

,

47

, , , , ,

57

,

59

, , , of MICOM

- Between of IC02M

- Between , of IC03M

- Between , , , , , , , of IC04M

- Between , , , of CN-UD/LR1/LR2

If there are no problems after above checks

• Confirm the assembly conditions that are catching and interfering parts in the rotation radial of the Louvers.



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.63) and GND

DC 5V

Between IC02M

(NO.14) and GND

Below DC 1V

DC 0V

About DC

12V

Fan OFF

Between Micom

(NO.53) and GND

DC 5V DC 0V

Between IC03M

(NO.11) and GND

Below DC 1V About DC 12V

• 4 way Relay

Check point 4 way ON

Between Micom

(NO.51) and GND

DC 5V

Between IC03M

(No.9) and GND

Below DC1V

4 way OFF

DC 0V

About 12V

Service Manual 49


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.


Schematic Diagram

Electric Control Device

Schematic Diagram

Service Manual 51

Schematic Diagram

Wiring Diagram

Indoor Unit

Outdoor Unit

AS-H096PB/D/ML2

AS-H126PA//B/D/M/SL2

AS-H126P*L3, AS-H096P*L3

AS-H076PB/D/ML2

AS-H076P*L3


Schematic Diagram

Components Location

MAIN P.W.B ASSEMBLY (AC PART)

• HEAT PUMP MODEL

T/BLOCK

CN-GND1

CY2

CY1

1(L)

CN-COMP

+

D01D

C01D

~ 4

3

NTC

2(N)

CN-OUT

GND

RY-COMP

CN-POW1

RY-4WAY

FUSE

250V-T3.15A

250V-T3.0A

125V-T3.15A

3

C01N

~

-

4

NF01N

PWB ASM : 6871A10121

RY-O2 PWB : 6870A90161D

IC03D

C02N

CY4

IC01D

1

C11D

SMPS

CN-MOTOR2

CN-MOTOR1

1

R05D

C02D

CY5

ZD02D

L3

C03D

C12D

Q01G

D05D

CN-ACDC1

R08D

R09D

D06D

Q02G

R16D

D02D

D03D

C10D

L1

R13D

ZD01D

IC05D IC06D

C04D

IC07D IC08D

L2

IC02D

R07D R06D

MAIN P.W.B ASSEMBLY (DC PART)

• TOP VIEW

• BOTTOM VIEW

Service Manual 53

DISPLAY ASSEMBLY

– 6871A20462

TOP VIEW

BOTTOM VIEW

SUB P.W.B ASSEMBLY

CN-D4

PWB ASM:6871A20363

1

CN-D2

PWB:6870A90126B

CN-D1

1

1

CN-D5

1

1

1

CN-D6

CN-D8

1

1

CN-CON(WH)

CN-12V(WH)

1

CN-D7

1

CN-SW(BL)

1


Schematic Diagram

Product Specifications

Product Specifications

Table-1

Model Name

AS-H096PB/D/ML2

AS-H096P*L3

AS-H126PA/B/D/M/S/WL2

AS-H126P*L3

AS-H076PB/D/ML2

AS-H076P*L3

Item Unit

Cooling Capacity

Heating Capacity

Moisture Removal

Power Source

Air Circulation

Noise Level

Indoor

Outdoor

Indoor

Outdoor

Btu/h

l

/h

Ø, V, Hz m 3 /min dB (A)±3

9200

9400

12000

12200

7500

7700

1.2

1.5

1.0

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

7

26

37

46

8.3

34

44

46

5.5

20

36

46

Input

Cooling

Heating

Running Cooling

Current Heating

E.E.R.

C.O.P

Motor Output

Dimensions

(W x H x D)

Net. Weight

W

A

Cooling Btu/hW

Heating

Indoor

W

Outdoor

Indoor mm

Outdoor

Indoor kg

Outdoor

840

860

3.8

3.85

10.95

3.2

24

25.5

570 x 568 x 137

770 x 540 x 245

8.5

31

1099

1200

4.9

5.3

10.92

2.98

24

25.5

570 x 568 x 137

770 x 540 x 245

8.5

35

685

705

3.0

3.1

10.95

3.2

24

25.5

570 x 568 x 137

770 x 540 x 245

8.5

31

Refrigerant g

Airflow Direction Control (Up & Down)

Remocon Type

Service Valve

Liquid

Gas inch(mm)

Sleeping Operation

Drain Hose

Connecting Cable(p*mm 2

Power Cord(p*mm 2 )

)

870(R410A)

O

L.C.D Wireless

1/4 (6.35)

880(R410A)

O

L.C.D Wireless

1/4 (6.35)

750(R410A)

O

L.C.D Wireless

1/4 (6.35)

3/8 (9.52)

O

1/2 (12.7)

O

3/8(9.52)

O

O O O

3*1.0mm

2 + 2*0.75mm

2 3*1.0mm

2 + 2*0.75mm

2 3*1.0mm

2 + 2*0.75mm

2

3*1.0mm

2 3*1.0mm

2 3*1.0mm

2

Service Manual 55

Exploded View

Exploded View

Indoor Unit


Exploded View

Outdoor Unit (7K Models)

437210

437212

554031

435301

559010

435511

546810

447910

552102-2

549610

649950

W0CZZ

567502

552102-1

552201

552111

552116

552202

561410

554160

550140

552203-1

430410

552203-2

Service Manual 57

Exploded View

Outdoor Unit (9K, 12K Models)

43721 1

437212

554031

435301

559010

546810

435511

447910

43041 0

649950

552201

552111

552116

552202

567502

554160

550140

552203-1

561410

552203-2


Replacement Parts List

Replacement Parts List

Indoor Unit

LOCATION

No.

DESCRIPTION

131410 CHASSIS ASSEMBLY

135312 GRILLE ASSEMBLY,FRONT(INDOOR)

135314 GRILLE ASSEMBLY,INLET

135500-1 COVER

135500-2 COVER

135500-3 COVER

135515 COVER ASSEMBLY,TOP(INDOOR)

146811 MOTOR ASSEMBLY,STEP

147581 LOUVER,HORIZONTAL

159830 AIR CLEANER ASSEMBLY

249951 CONTROL BOX ASSEMBLY,INDOOR

263230 THERMISTOR ASSEMBLY

264110 POWER CORD ASSEMBLY

267110 REMOTE CONTROLLER ASSEMBLY

268712 PWB(PCB) ASSEMBLY,DISPLAY

268714-1 PWB(PCB) ASSEMBLY,MAIN

268714-2 PWB(PCB) ASSEMBLY,MAIN(DC)

268717 PWB(PCB) ASSEMBLY,SUB

330870 DRAIN PAN ASSEMBLY

346810 MOTOR ASSEMBLY,INDOOR

35211B TUBE ASSY,TUBING

352150 HOSE ASSEMBLY,DRAIN

352380 AIR GUIDE

354210 EVAPORATOR ASSEMBLY,FIRST

359012 FAN,TURBO

PART No.

GOGH

BLUE

AS-

H096PB/D/ML2

AS-

H126PA/B/D/M/S/

AS-

H076PB/D/ML2

AS-H076P*L3

WL2

3141A20030A 3141A20030A 3141A20030A 3141A20030C

3531A20277X -

3531A20277C 3531A20277C 3531A20277C -

-

WOOD 3531A20277E 3531A20277E 3531A20277E 3531A20277E

METAL 3531A20277A 3531A20277A 3531A20277A -

SISLEY 3531A20277W

WHITE 3531A20277G 3531A20277G

GOGH

BLUE

3531A20147Z

-

-

-

3531A20278B 3531A20278B 3531A20278B

-

-

-

-

WOOD 3531A20278C 3531A20278C 3531A20278C 3531A20278C

METAL 3531A20278A 3531A20278A 3531A20278A -

SISLEY 3531A20147W

WHITE 3531A20278D 3531A20278D

-

-

-

-

3550A20123C 3550A20123C 3550A20123C 3550A20123C

3550A20124B 3550A20124B 3550A20124B 3550A20124B

3550A20060A 3550A20060A 3550A20060A 3550A20512B

3551A20031F 3551A20031F 3551A20031F 3551A20031H

4681A20055A 4681A20055A 4681A20055A 4681A20055A

4758A20014B 4758A20014B 4758A20014B 4758A20014B

5983A20007T 5983A20007T 5983A20007T 5983A20007T

4995A20487B 4995A20487A 4995A20487C 4995A20487C

6323A20004N 6323A20004N 6323A20004N 6323A20004N

6411A20014S 6411A20014S 6411A20014S 6411A20014S

6711A90031Z 6711A90031Z 6711A90031Z 6711A90031Z

6871A20462A 6871A20462A 6871A20462A 6871A20462A

6871A10121L 6871A10121L 6871A10121L 6871A10121L

6871A20439Q 6871A20439P 6871A20439R 6871A20439R

6871A20363F 6871A20363F 6871A20363F 6871A20363F

3087A30004A 3087A30004A 3087A30004A 3087A30004A

4681A20091A 4681A20091A 4681A20091A 4681A20091A

5211AR7066F 5211AR7066D 5211AR7066F 5211AR7066F

5251AR1222R 5251AR1222R 5251AR1222R 5251AR1222R

5238A20034A 5238A20034A 5238A20034A 5238A20034A

5421A20072A 5421A20072A 5421A20072A 5421A20072A

5900A00003A 5900A00003A 5900A00003A 5900A00003A

NOTE)

*

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

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

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

R

R

R

R

R

R

R

R

R

R

Service Manual 59

Indoor Unit

LOCATION

No.

DESCRIPTION

131410 CHASSIS ASSEMBLY

135312 GRILLE ASSEMBLY,FRONT(INDOOR) GOGH("A")

BLUE("B")

WOOD("D")

135314 GRILLE ASSEMBLY,INLET

METAL("M")

SISLEY("S")

WHITE("W")

GOGH("A")

BLUE("B")

WOOD("D")

METAL("M")

SISLEY("S")

WHITE("W")

135500-1 COVER

135500-2 COVER

135500-3 COVER

135515 COVER ASSEMBLY,TOP(INDOOR)

146811 MOTOR ASSEMBLY,STEP

147581 LOUVER,HORIZONTAL

159830 AIR CLEANER ASSEMBLY

249951 CONTROL BOX ASSEMBLY,INDOOR

263230 THERMISTOR ASSEMBLY

264110 POWER CORD ASSEMBLY

266090 H.V ASSEMBLY

267110 REMOTE CONTROLLER ASSEMBLY

268712 PWB(PCB) ASSEMBLY,DISPLAY

268714-1 PWB(PCB) ASSEMBLY,MAIN

268714-2 PWB(PCB) ASSEMBLY,MAIN(DC)

268717 PWB(PCB) ASSEMBLY,SUB

330870 DRAIN PAN ASSEMBLY

346810 MOTOR ASSEMBLY,INDOOR

352115 TUBE ASSEMBLY,EVAPORATOR IN

352116 TUBE ASSEMBLY,EVAPORATOR OUT

35211B TUBE ASSEMBLY,TUBING

352150 HOSE ASSEMBLY,DRAIN

352380 AIR GUIDE

354210 EVAPORATOR ASSEMBLY,FIRST

359012 FAN,TURBO

349600 BRACKET,MOTOR

PART No.

ASNH096P*L3(AS-H096P*L3)

6323A20004N

6411A20014S

6609A10008A

6711A90031Z

6871A20462A

6871A10121L

6871A20439Q

6871A20363F

3087A30004A

4681A20091A

5211A20302A

5211A20301B

5211AR7066F

5251AR1222R

5238A20034A

5421A20072A

5900A00003A

4960A20016A

3141A20030C

-

3531A20277C

3531A20277E

3531A20277A

-

3531A20277G

-

3531A20278B

3531A20278C

3531A20278A

-

3531A20278D

3550A20123C

3550A20124B

3550A20512B

3551A20031H

4681A20055A

4758A20014B

5983A20007T

4995A20487B

ASNH126P*L3(AS-H126P*L3)

6323A20004N

6411A20014S

6609A10008A

6711A90031Z

6871A20462A

6871A10121L

6871A20439P

6871A20363F

3087A30004A

4681A20091A

5211A20302B

5211A20301B

5211AR7066D

5251AR1222R

5238A20034A

5421A20072A

5900A00003A

4960A20016A

3141A20030C

3531A20277X

-

3531A20277E

3531A20277A

3531A20277W

-

3531A20147Z

-

3531A20278C

3531A20278A

3531A20147W

-

3550A20123C

3550A20124B

3550A20512B

3551A20031H

4681A20055A

4758A20014B

5983A20007T

4995A20487A

NOTE)

*

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

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

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

R

R

R

R

R

R

R

R

R

R

R

R

R

R



Outdoor Unit

LOCATION

No.

DESCRIPTION

430410 BASE ASSEMBLY,OUTDOOR

435301 GRILLE,DISCHARGE

435511 COVER ASSEMBLY,CONTROL(OUTDOOR)

437210 PANEL ASSEMBLY,FRONT(OUTDOOR)

437212 PANEL ASSEMBLY,REAR(OUTDOOR)

447910 BARRIER ASSEMBLY,OUTDOOR

546810 MOTOR ASSEMBLY,OUTDOOR

549610 MOUNT, MOTOR

550140 ISOLATOR,COMP

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

561410 COIL ASSEMBLY,REVERSING VALVE

649950 CONTROL BOX ASSEMBLY,OUTDOOR

W0CZZ CAPACITOR,DRAWING

PART No.

AS-

H096PB/D/ML2

AS-

H126PA/B/D/M/S

L2

3041A20008K 3041A20008K

AS-

H076PB/D/ML2

AS-H076P*L3

3041A20079A 3041A20079A

3530A20006G 3530A20006G 3530A10059G 3530A10059H

3551A30023W 3551A30023W 3551A30023Q 3551A30023Q

3721A20027T 3721A20027T 3721A20258A 3721A20258A

3721A20026V 3721A20026V 3720A10172C 3720A10172C

4791A30002A 4791A30002A 4790A10025D 4790A10025D

4681A20004S 4681A20004S 4681A20121B 4681A20121B

4960A20016A 4960A20016A

4H00982E

4960A10013A 4960A10013A

4H00982E 4H00982E

5211A30331Q 5211A20117J 5211A21121B 5211A21121B

5211A20160E 5211A20140X 5211A20188U 5211A20188U

5220AR7182A 5220AR7182A 5220AR7182A 5220AR7182A

5220AR3228B 5220AR3228D 5220AR3228D 5220AR3228D

5220A20005B 5220A20005B 5220A20005B 5220A20005B

5220A20001Q 5220A20006F 5220A20001Q 5220A20001Q

5403A20019F 5403A20019V 5403A20045M 5403A20045M

2520UGAP2GA 2520UGHP2AA 2520UGDP2CA 2520UGDP2CA

5901A10055A 5901A10055A 5900AR1266A 5900AR1266A

3A02028Y 6141AR3733R 6141A20017A 6141A20017A

4995A20083B 4995A20083Y

6120AR2194N 2H01451T

4995A10032T 4995A90162A

6120AR2194H -

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Service Manual 61


Outdoor Unit

LOCATION

No.

DESCRIPTION

430410 BASE ASSEMBLY,OUTDOOR

435301 GRILLE,DISCHARGE

435511 COVER ASSEMBLY,CONTROL(OUTDOOR)

437210 PANEL ASSEMBLY,FRONT(OUTDOOR)

437212 PANEL ASSEMBLY,REAR(OUTDOOR)

447910 BARRIER ASSEMBLY,OUTDOOR

546810 MOTOR ASSEMBLY,OUTDOOR

549610 MOUNT,MOTOR

550140 ISOLATOR,COMP

552111 TUBE ASSEMBLY,CAPILLARY

552116 TUBE ASSEMBLY,REVERSING

552201 VALVE,CHECK

552202 VALVE,REVERSING



554031 CONDENSER ASSEMBLY,BENT

554160 COMPRESSOR SET

559010 FAN ASSEMBLY,PROPELLER

561410 COIL ASSEMBLY,REVERSING VALVE

649950 CONTROL BOX ASSEMBLY,OUTDOOR

ASUH096PUL3

3041A20008K

3530A20006G

3551A30023W

3721A20027T

3721A20026V

4791A30002A

4681A20004S

4960A10002A

-

5211A30331Q

5211A20160E

5220AR7182A

5220AR3228B

5220A20005B

5220A20001Q

5403A20019F

2520UGAP2GA

5901A10055B

3A02028Y

4995A90083B

PART No.

ASUH126PUL3

3041A20008K

3530A20006G

3551A30023W

3721A20027T

3721A20026V

4791A30002A

4681A20004S

4960A10002A

4H00982E

5211A20117J

5211A20140X

5220AR7182A

5220AR3228D

5220A20005B

5220A20006F

5403A20019V

2520UGHP2AA

5901A10055B

6141AR3733R

4995A90083Y

REMARKS

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P/No.: 3828A20135V

Printed in Korea

LG Room Air Conditioner

Room

Air Conditioner

SERVICE MANUAL

Air Conditioner Service Manual

TABLE OF CONTENTS

2 Room Air Conditioner

LG Model Name

2003~

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.

Installation

4 Room Air Conditioner

Operation

6 Room Air Conditioner

Installation

Operation

Dimensions

Symbols used in this Manual

This symbol alerts you to the risk of electric shock.

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

This symbol indicates special notes.

Indoor Unit

8 Room Air Conditioner

Outdoor Unit

10 Room Air Conditioner

Installation

Selection of the Best Location

Piping Length and Elevation

Preparing Work for Installation

12 Room Air Conditioner

Fixing the Indoor Unit

Drill a Hole in the Wall

Flaring Work

14 Room Air Conditioner

Connecting the Pipings

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.

16 Room Air Conditioner

Connecting the Cables to the Indoor Unit.

18 Room Air Conditioner

Connecting the Cables to the Outdoor Unit

Checking the Drainage

Forming the Piping

20 Room Air Conditioner

Air Purging

Air Purging with Vacuum Pump

Soap water method

22 Room Air Conditioner

Front Panel Assembly

Test Running

24 Room Air Conditioner

Operation

Function of Controls

26 Room Air Conditioner

28 Room Air Conditioner

30 Room Air Conditioner

Display Function

32 Room Air Conditioner

Self-diagnosis Function

Remote Control Operations

34 Room Air Conditioner

Disassembly

Indoor Unit

36 Room Air Conditioner

Troubleshooting Guide

Refrigeration Cycle Diagram

(1) Cooling Only Models

(2) Cooling & Heating Models

2-way, 3-way Valve

38 Room Air Conditioner

Pumping Down

Balance Refrigerant of the 3-way Valve

40 Room Air Conditioner

Evacuation

Vacuum pump

Gas Charging