LG AS-H0966KA2, F09AHJ, AS-H126RKA2, F12AHJ, AS-H186TKA2 User Manual

Room Air Conditioner

SVC MANUAL(Exploded View)

MODEL : AS-H0966KA2 (F09AHJ)

AS-H126RKA2 (F12AHJ) AS-H186TKA2 (F18AHJ) AS-H246TKA2 (F24AHJ)

CAUTION

Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.

Internal Use Only

http://biz.lgservice.com

- 2 -

LGE Internal Use Only

Air Conditioner Service Manual

TABLE OF CONTENTS

LG Model Name ...............................................................................................................................................3

Safety Precautions..........................................................................................................................................5

Dimensions....................................................................................................................................................10

Symbols Used in this Manual...................................................................................................................10

Indoor Unit................................................................................................................................................10

Outdoor Unit.............................................................................................................................................11

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

Installation .....................................................................................................................................................15

Selection of the Best Location..................................................................................................................15

Piping Length and Elevation.....................................................................................................................15

How to Fix Installation Plate.....................................................................................................................16

Drill a Hole in the Wall..............................................................................................................................16

Drain hose junction...................................................................................................................................16

Flaring work and connection of piping .......................................................................................................17

Flaring work..............................................................................................................................................17

Connection of Piping Indoor.....................................................................................................................17

Connection of the Pipes-Outdoor.............................................................................................................21

Connecting the cable between indoor unit and outdoor unit ...................................................................22

Connect the Cable to the Indoor Unit.......................................................................................................22

Connect the Cable to the Outdoor Unit ....................................................................................................23

Checking the drainage and forming the pipings........................................................................................24

Checking the Drainage.............................................................................................................................24

Form the Piping........................................................................................................................................24

AIR PURGING ................................................................................................................................................25

Air purging................................................................................................................................................25

Air purging with vacuum pump.................................................................................................................25

Test Running .................................................................................................................................................27

Operation .......................................................................................................................................................28

Function of Controls .................................................................................................................................28

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

Self-diagnosis Function............................................................................................................................32

Remote Control Operations......................................................................................................................33

Disassembly ..................................................................................................................................................34

Indoor Unit................................................................................................................................................34

Schematic Diagram.......................................................................................................................................37

Electric Control Device.............................................................................................................................37

Wiring Diagram.........................................................................................................................................38

Components Location ..............................................................................................................................39

Troubleshooting Guide.................................................................................................................................41

Refrigeration Cycle Diagram ....................................................................................................................41

2-way, 3-way Valve .................................................................................................................................42

Cycle Parts...............................................................................................................................................48

Electronic Parts ........................................................................................................................................49

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

- 3 -

LGE Internal Use Only

LG Model Name

2003

12 - 345678910

Code Type Code of Model Meaning

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

Refrigerant A: Chang-won R410A Z: Brazil

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

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

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

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

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

4, 5 Capacity 0~9 Cooling/Heating Capacity

Ex. "09" → 9,000 Btu/h

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

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

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

7 Chassis A~Z Name of Chassis of Unit

Ex. LSP → SP Chassis

8 Look A~Z Look,

Color (Artcool Model)

9 Function A~Z

10 Serial No. 1~9 LG Model De

* ARTCOOL COLOR

velopment Serial No.

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

T

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

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

- 4 -

LGE Internal Use Only

2004~

12 - 345678910

Code Type Code of Model Meaning

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

Refrigerant A: Chang-won R410A Z: Brazil

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

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

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

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

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

4, 5 Capacity 0~9 Cooling/Heating Capacity

Ex. "09" → 9,000 Btu/h

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

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

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

CHASSIS Look

D K

L G M N D P

Division Panel Type(Deluxe) Fighting 'Look'

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

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

7 Chassis A~Z Name of Chassis of Unit

Ex. LSP → SP Chassis

8 Look A~Z Look,

Color (Artcool Model)

9 Function A~Z

10 Serial No. 1~9 LG Model De

* ARTCOOL COLOR

velopment Serial No.

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

T

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

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

S4/S5

S6 SQ SR

ST

ST2

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LGE Internal Use Only

Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions must be followed.

■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications.

■ Meanings of symbols used in this manual are as shown below.

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage to properties only.

Be sure not to do.

Be sure to follow the instruction.

Do not use damaged power cords, plugs, or a loose socket.

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

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

Install the panel and the cover of control box securely.

.Do not modify or extend the power cord.

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

■ Installation

- 6 -

LGE Internal Use Only

Safety Precautions

Do not install the product on a defective installation stand.

Be sure the installation area does not deteriorate with age.

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

product.

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

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

•

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

Be cautious when unpacking and installing the product.

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

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

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

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

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LGE Internal Use Only

Safety Precautions

■ Operation

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

Use a dedicated outlet for this appliance.

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

Grasp the plug to remove the cord from the outlet. Do not touch it with wet hands.

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

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

Do not allow water to run into electrical parts. Do not store or use flammable gas or com-

bustibles near the air conditioner.

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

• There is risk of fire or failure of product.

Wax

Thinner

- 8 -

LGE Internal Use Only

Always check for gas (refrigerant) leakage after installation or repair of product.

Install the drain hose to ensure that water is drained away properly.

• Low refrigerant levels may cause failure of product. • A bad connection may cause water leakage.

Keep level even when installing the product. Use two or more people to lift and transport

the air conditioner.

• To avoid vibration or water leakage. • Avoid personal injury.

■ Installation

90˚

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

Be cautious that water could not enter the product.

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

Safety Precautions

- 9 -

LGE Internal Use Only

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

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

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

• There is risk of personal injury.

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

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

• There is risk of personal injury and failure of product. • There are sharp and moving parts that could cause

personal injury.

■ Operation

Wax

Safety Precautions

- 10 -

LGE Internal Use Only

Dimensions

Installation plate

D

H

W

W mm 758 900 1,090

H mm 260 285 314

D mm 155 156 172

Model

Dimension

9K Btu Series 12K Btu Series 18K, 24K Btu Series

Indoor Unit

This symbol alerts you to the risk of electric shock.

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

This symbol indicates special notes.

NOTICE

Symbols Used in this Manual

W

L2

L3

L1

D

H

L4

L5

Gas side

(3-way valve)

Liquid side

(2-way valve)

MODEL

9K Btu Series 12K Btu Series

DIM unit

W mm 575 717

H mm 525 481

D mm 260 228

L1 mm 301 270

L2 mm 73 56

L3 mm 392 464

L4 mm 35 17

L5 mm 100 130

Dimensions

Outdoor Unit

- 11 -

LGE Internal Use Only

Dimensions

- 12 -

LGE Internal Use Only

Outdoor Unit

MODEL

DIM

W

L2

L3

L1

D

H

L4

L5

Gas side

(3-way valve)

Liquid side

(2-way valve)

W mm 840

H mm 577

D mm 276 L1 mm 337 L2 mm 64 L3 mm 611 L4 mm 16 L5 mm 156

18K But Series

Dimensions

- 13 -

LGE Internal Use Only

Dimensions

Outdoor Unit

W

L7 L6 L8 L9

D

L1

L2

L3

L10L11

L4L5

H

Gas side

Liquid side

MODEL

DIM

W mm 870

H mm 655

D mm 320

L1 mm 370

L2 mm 340

L3 mm 25

L4 mm 630

L5 mm 25

L6 mm 546

L7 mm 162

L8 mm 162

L9 mm 54

L10 mm 74.5

L11 mm 79

24K Btu Series

- 14 -

LGE Internal Use Only

Model Name

Item Unit

Cooling Capacity

kW

Heating Capacity

Moisture Removal l/h

Power Source Ø, V, Hz

Air Circulation

Indoor

m3/min

Outdoor

Noise Level

Indoor

dB (A)±3

Outdoor

Input

Cooling

W

Heating

Running

Cooling

A

Current

Heating

E.E.R. Cooling

W/W

C.O.P Heating

Motor Output

Indoor

W

Outdoor

Dimensions

Indoor

mm

(W x H x D)

Outdoor

Net. Weight

Indoor

kg

Outdoor

Refrigerant (R410A) g

Airflow Direction Control (Up & Down)

Airflow Direction Control (Left & Right)

Chaos Wind

Timer

Self Diagnosis

Remocon Type

Service Valve

Liquid

inch(mm)

Gas

Sleeping Operation

Drain Hose

Connecting Cable

Power Cord

Product Specifications

Table-1

2.48 3.52 5.28 6.74

2.56 3.52 5.28 6.74

1.2 1.2 2.2 2.9

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

5.8/6.6 8.8/9.5 13.4 15.1

20 22 42 42

37 40 40 47

49 52 54 57

950 1270 1900 2350

900 1120 1950 2350

4.2 5.8 8.5 10.5

4.2 5.2 8.7 10.5

2.61 2.77 2.78 2.87

2.84 3.14 2.71 2.87

7 9.5 22 22

18 - 72 82.9

756x260x155 900x285x156 1090x314x172 1090x314x172

575x525x260 717x481x228 870x577x276 870x655x320

5.3 7.2 12 12

26 30 50 60

710g 720g 1270g 1500g

OOOO

----

OOOO

7Hr OFF 7Hr OFF 7Hr OFF 7Hr OFF

OOOO

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

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

3/8"(9.52) 1/2"(12.7) 1/2"(12.7) 5/8”(15.88)

----

OOOO

1.0mm2x 3, 0.75mm2x 2 1.0mm2x 3, 0.75mm2x 2 1.5mm2x 3, 0.75mm2x 2 2.5mm2x 3, 0.75mm2x 2

3 x 1.0mm

2

3 x 1.0mm

2

3 x 1.5mm

2

3 x 2.5mm

2

AS-H0966KA2

(F09AHJ)

AS-H126RKA2

(F12AHJ)

AS-H186TKA2

(F18AHJ)

AS-H246TKA2

(F24AHJ)

Installation

Indoor unit

• Do not have any heat or steam near the unit.

• Select a place where there are no obstacles in front of the

unit.

• Make sure that condensation drainage can be conveniently routed away. Do not install near a doorway.

• Ensure that the space around the left and right of the unit is more than "A". The unit should be installed as high on the wall as possible, allowing a minimum of "B" from ceiling.

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

Outdoor unit

• If an awning is built over the unit to prevent direct sunlight or rain exposure, make sure that heat radiation from the condenser is not restricted.

• Ensure that the space around the back and sides is more than 10cm. The front of the unit should have more than 70cm of space.

• Do not place animals and plants in the path of the warm air.

• Take the air conditioner weight into account and select a

place where noise and vibration are minimum.

• Select a place so that the warm air and noise from the air conditioner do not disturb neighbors.

Rooftop Installations:

• If the outdoor unit is installed on a roof structure, be sure to level the unit. Ensure the roof structure and anchoring method are adequate for the unit location.

• Consult local codes regarding rooftop mounting.

More than "A"

More than "B"

More than 2.3m

More than "B"

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

• Oil trap should be installed every 5~7 meters.

Grade

Clearance(cm)

AB

5K~28K 10 5

30K~38K 30 12

Pipe Size

Capacit

y

(Btu/h)

GAS LIQUID

Max.

Length

A (m)

Additional

Refrigerant

(g/m)

Max.

Elevation

B (m)

Standard

Length

(m)

5k~14k

3/8"(Ø9.52) 1/4"(Ø6.35) 4 or 7.5 7 15 20

1/2"(Ø12.7) 1/4"(Ø6.35) 4 or 7.5 7 15 20

1/2"(Ø12.7) 1/4"(Ø6.35) 4 or 7.5 15 30 20

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

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

30k~38k

5/8"(Ø15.88) 3/8"(Ø9.52) 7.5 15 30 30

3/4"(Ø19.05) 3/8"(Ø9.52) 7.5 15 30 50

If case more than 5m

Outdoor unit

Indoor unit

A

B

Outdoor unit

Indoor unit

A

B

A

Oil trap

Outdoor unit

Indoor unit

B

I

Selection of the Best Location

Piping Length and Elevation

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

More than 10cm More than 10cm

More than 60cm

More than 70cm

- 15 -

LGE Internal Use Only

- 16 -

LGE Internal Use Only

Installation

The wall you select should be strong and solid enough to prevent vibration

1. Mount the installation plate on the wall with four type A screws. If mounting the unit on a concrete wall, use anchor bolts.

• Mount the installation plate horizontally by aligning the centerline using a level.

2. Measure the wall and mark the centerline. It is also important to use caution concerning the location of the installation plate-routing of the wiring to power outlets is through the walls typically. Drilling the hole through the wall for piping connections must be done safely.

• Drill the piping hole with a ø70mm hole core drill. Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side.

• Open the Front Grille.

• Pass Telephone Control Cord Wire through the hole

which the power cord goes through.

• Connect Telephone Control Cord Wire to the phone jack

of telephone PCB of Control Box.

• Fix Telephone Control Cord Wire inside Control box so

as not to disconnect.

• Close the Front Grille.

Installation Plate

Type "A" screw

5-7mm

(3/16"~5/16")

Indoor

WALL

Outdoor

Installation plate

Ø70mm

Left rear piping Right rear piping

C

D

B

A

Ø70mm

ABCD

S6(9k) 75 12 80 12

SR2(12k) 0 40 20 40

ST2(18k/24k) 105 0 210 0

CHASSIS

(Grade)

Distance (mm)

How to Fix Installation Plate Drill a Hole in the Wall

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

Connecting

part

Adhesive

Drain hose

- 17 -

LGE Internal Use Only

Flaring work and connection of piping

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.

Check

• Compare the flared work with figure below.

• If flare is noted to be defective, cut off the flared sec-

tion and re-flare it.

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

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

Burr removal

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

• Put the end of the copper tube/pipe in a downward direction as you remove burrs in order to avoid dropping burrs into the tubing.

Putting nut on

• Remove flare nuts attached to indoor and outdoor unit, then put them on pipe/tube having completed burr removal. (not possible to put them on after flaring work)

Flaring work

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

Copper

pipe

90°

Slanted Uneven Rough

Pipe

Reamer

Point down

Flare nut

Copper tube

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

mm inch mm

Ø6.35 1/4 0~0.5

Ø9.52 3/8 0~0.5

Ø12.7 1/2 0~0.5

Ø15.88 5/8 0~1.0

Ø19.05 3/4 1.0~1.3

Outside diameter A

Inclined

Inside is shiny without scratches

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

Connection of piping -- Indoor

Tubing holder

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

- 18 -

LGE Internal Use Only

Flaring work and connection of piping

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

Drain hose

Insert the connecting cable into the indoor unit from the 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.

NOTE: If the drain hose is routed inside the room, insulate the hose with an insulation material* so that dripping from "sweating"(condensation) will not damage furniture or floors.

*Foamed polyethylene or equivalent is recommended.

Indoor unit installation

• Hook the indoor unit onto the upper portion of the installation plate.(Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate.) Ensure that the hooks are properly seated on the installation plate by moving it left and right.

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

Connecting the pipings to the indoor unit and drain hose to drain pipe.

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

• Tighten the flare nut with a wrench.

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

drain pipe.

Wrap the insulation material around the connecting portion.

•Overlap the connection pipe insulation material and the

indoor unit pipe insulation material. Bind them together with vinyl tape so that there is no gap.

• Wrap the area which accommodates the rear piping hous-

ing section with vinyl tape.

Connecting pipe

Connecting cable

Tape

Drain hose

Connecting

cable

Indoor unit tubing Flare nut Pipes

Wrench

Indoor unit tubing

Open-end wrench (fixed)

Connection pipe

Flare nut

mm inch kg.m

Ø6.35 1/4 1.8 Ø9.52 3/8 4.2

Ø12.7 1/2 5.5 Ø15.88 5/8 6.6 Ø19.05 3/4 6.6

Outside diameter Torque

Vinyl tape(narrow)

Adhesive

Drain pipe

Indoor unit drain hose

Plastic bands

Insulation material

Vinyl tape(narrow)

Connection pipe

Connecting cable

Vinyl tape (wide)

Wrap with vinyl tape

Indoor unit pipe

Pipe

For right rear piping

- 19 -

LGE Internal Use Only

Flaring work and connection of piping

• Bundle the piping and drain hose together by wrapping them with vinyl tape for enough to cover where they fit into the rear piping housing section.

Connecting the pipings to the indoor unit and the drain hose to drain pipe.

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

• Tighten the flare nut with a wrench.

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

drain pipe.

Wrap the insulation material around the 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.

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.

Insert the connecting cable into the indoor unit.

• Don't connect the cable to the indoor unit.

• Make a small loop with the cable for easy connection later.

Indoor unit installation

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

Tape the drain hose and the connecting cable.

• Connecting cable

Wrap with vinyl tape

Drain hose

Pipe

Vinyl tape(wide)

For left rear piping

Drain pipe

Connecting cable

Installation plate

Spacer

Indoor unit

8cm

Indoor unit tubing Flare nut Pipes

Wrench

Indoor unit tubing

Connection pipe

Flare nut

Open-end wrench (fixed)

mm inch kg.m

Ø6.35 1/4 1.8 Ø9.52 3/8 4.2

Ø12.7 1/2 5.5 Ø15.88 5/8 6.6 Ø19.05 3/4 6.6

Outside diameter Torque

Vinyl tape

Adhesive

Drain hose

Indoor unit drain hose

(narrow)

Plastic bands

Insulation material

- 20 -

LGE Internal Use Only

Installation Information (For left piping)

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

• Press on the upper side of clamp. ( )

Flaring work and connection of piping

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

Indoor unit installation

• Remove the spacer.

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

tion plate by moving it left and right.

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

• 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.

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

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

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

Vinyl tape(narrow)

Connection pipe

Connecting cable

Indoor unit piping

Pipe

Vinyl tape (wide)

Wrap with vinyl tape

Drain hose

Vinyl tape(narrow)

Pipe

Wrap with vinyl tape(wide)

Piping for passage through piping hole

Tubing holder

Drain hose

Connecting

cable

• Unfold the tubing to downward slowly. ( )

• Bend the tubing to the left side of chassis.

- 21 -

LGE Internal Use Only

Flaring work and connection of piping

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.

• Bad case

• Following bending type from right to left could cause

problem of pipe damage.

Connection of the pipes-Outdoor

mm inch kg.m

Ø6.35 1/4 1.8 Ø9.52 3/8 4.2

Ø12.7 1/2 5.5 Ø15.88 5/8 6.6 Ø19.05 3/4 6.6

Outside diameter Torque

Outdoor unit

Gas side piping (Bigger diameter)

Liquid side piping (Smaller diameter)

Torque wrench

- 22 -

LGE Internal Use Only

Connect the cable to the Indoor unit.

Connecting the cable between indoor unit and outdoor 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.

Air

Conditioner

Main power source

Circuit Breaker

Use a circuit breaker or time delay fuse.

NORMAL CROSS-SECTIONAL AREA 0.75mm

2

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

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

(mm2)

• 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.

Connecting the cable between indoor unit and outdoor unit

• 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.

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

0.75 1.0 1.5 2.5 2.5 5.5

Unit(A) Indoor Indoor Indoor Indoor Outdoor Outdoor

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

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

Grade

(mm2)

30k, 32k 36k, 38k

0.75 0.75

Cable Type(B) H07RN-F H07RN-F

NORMAL CROSS

-SECTIONAL AREA

Grade

(mm2)

- 23 -

LGE Internal Use Only

Connecting the cable between indoor unit and outdoor unit

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

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

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

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

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

Outdoor Unit

Cover control

Cord clamp

1(L) 2(N) 34 1(L) 2(N) 34

CASE 1 CASE 2

Connecting cable

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 22))

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

8) The following would be caused by voltage drop.

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

tion of the overload.

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

Connect the cable to the outdoor unit

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

15 20 30 30 40

Circuit

Breaker

(A)

Grade

- 24 -

LGE Internal Use Only

Checking the drainage and forming the pipings

Checking the drainage Form the piping

To remove the front panel from the indoor unit.

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

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

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.

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.

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.

Drain piping

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

• Do not make drain piping.

Pull the right and the left side.

Downward slope

Do not raise

Accumulated drain water

Tip of drain hose dipped in water

Air

Waving

Water leakage

Ditch

Less than 50mm gap

Water leakage

Taping

Drain hose

Pipings

Connecting cable

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

Seal small openings around pipings with a gum type sealer.

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

Trap

- 25 -

LGE Internal Use Only

Air purgingd

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

• Pressure in the system rises.

• Operating current rises.

• Cooling(or heating) efficiency drops.

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

illary tubing.

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

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

• 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.

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.

• 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.

AIR PURGING

Air purging

Air purging with vacuum pump

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.

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.

Lo Hi

Indoor unit

Outdoor unit

Manifold valve

Charge hose

Nitrogen gas cylinder(in vertical standing position)

Pressure gauge

- 26 -

LGE Internal Use Only

Air purgingd

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.

• 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.

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

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

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

clockwise approximately 90°, wait for about 2~3 sec, and close it.

(4) Apply a soap water or a liquid neutral detergent on the

indoor unit connection or outdoor unit connections by a soft brush to check for leakage of the connecting points of the piping.

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

Soap water method

Gas side

Liquid side

Cap

Hexagonal wrench

2-way valve

(Open)

3-way valve

(Close)

Required time for evacuation when 30 gal/h vacuum

pump is used

10 min. or more 15 min. or more

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

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

Indoor unit

Outdoor unit

Lo Hi

Manifold valve

Vacuum pump

Pressure gauge

Open

Close

- 27 -

LGE Internal Use Only

Test running

TEST RUNNING

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

nected.

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.

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.

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.

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.

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).

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

Bolt

Tubing connection

Discharge temperature

Discharge air

Intake temperature

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

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

Outside ambient

TEMP.

Refrigerant

The pressure of the gas side

service valve.

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.

PUMP DOWN

Power button

Open the front panel upward

- 28 -

LGE Internal Use Only

Operation

Function of Controls

Operation

• 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)

Comp. Running Incidator

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

2) H/P Model

Operation Indicator

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

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

Defrost Indicator

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

■ Cooling Mode Operation

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

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

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

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

■ Healthy Dehumidification Mode

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

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

- 29 -

LGE Internal Use Only

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°…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

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

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

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

operates with the low airflow speed.

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

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

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

■ Defrost Control

• While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing, reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit.

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

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

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

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

moment, the defrost control time is determined.

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

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

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

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

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

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

- 30 -

LGE Internal Use Only

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.

• 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.

Heat pump Model

Cooling Model

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

Operating mode Cooling Cooling Healthy Dehumidification Heating

Indoor FAN Speed

High High High High

Setting Temperature

22°C22°C23°C24°C

- 31 -

LGE Internal Use Only

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.

• 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.

- 32 -

LGE Internal Use Only

Self-diagnosis Function

Operation

Display Function

1. Heating Model 2. Cooling Model

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

• Hot-start, Deice

Operation Indicator

Deicer Indicator

Operation Indicator

Compressor on Indicator

OUT

DOOR

3sec 3sec 3sec

(once)

Error

Code

1

Error Display LED

(Indoor body operation LED)

Error contents

• Indoor room temperature thermistor open/short

• Indoor pipe temperature thermistor open/short.

• Indoor Thermistor assembly check

SVC check point

- 33 -

LGE Internal Use Only

Remote Control Operations

The remote control transmits the signals to the system.

Operation

- 34 -

LGE Internal Use Only

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

- 35 -

LGE Internal Use Only

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.

4. To remove the Evaporator.

• Remove 3 screws securing the evaporator(at the left 2EA in the Eva Holder, at the right 1EA).

Caution label

• When repair, do not damage the Caution label.

- 36 -

LGE Internal Use Only

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

- 37 -

LGE Internal Use Only

Schematic Diagram

44

ANI0

ANI1

ANI4

ANI3

ANI6 / LED1

ANI5

ANI7 / LED2

IT0

12

N

ANI2

3

8

11

10

9

7

6

5

4

A

2

1

RFE

V

31

X

18

15

Z

B

N

113T14I

TV

16

D

17

D

26

21

RDX

19

20

V22P

P

23

RESET

24

25

VSS0

X1

X2

27

28

VDD0

29

30

38

41

ADV

D

43

42

40

39

35

37

36

32

33

34

FORCE

FAN

12V

COMP

4WAY

FAN

L(AC)

LOAD

COMP

4WAY

OR

RD

YL

PK

BL

R1,R2=4.7K

(SRC1201S)

VOLTAGE GND

TCET1109-3208

R03L,1%

27K,1/4W

12K

R04L

PKM13EPY-4002

RY-4WAY

12V

66

103

6 6

FORCE

SW(FORCE)

OUTDOOR

220,1/4W

R02G

OPERATION

LED1

LED2

R01G

2133

1

2

5

44

5

AC PART

220/10V

C12L

321

213

4

55

4

5V

220,25V

O I

7805

C05D

220/10

5V

+

103/25V

C04D

100/25V

C02D

VOLTAGE GND

DC LOW

C03D

103/25V

4.7K,1/6W R01D

+

ICO1A

S78DL05L

L02D

CHIP

R2

R1

Q01G

Q02G

Q03G

12V

L01D

BEAD

S

C05J

0.1uF,100V

4.7K,1/6W

5

8

102,1KV

C06D

R02D

UF4004

C01D

+

D01D

1

3

+

100,1/8W

R02J

27K,1/4W

C

+

D06J

1N4937

R01J

DC LOW

6.8/450 C03J

IC01L

INT

1uF,50V

SMPS

EE1916S

Lp=3.44mH

102,1KV

C06J

C04J

1K

2SC5343

Q01L

KTC3198-Y

LNK500P

IC01J

LINKSWITCH

D

C01L

103

NTC SCK-102

R01E

5V

R02E

20

BZ01E

103

C14L

R1,R2=4.7K

(SRC1201S)

Q01G~04G

R21H-26H

12.1K,1%

F3,OR3H

F1,OR1H

HIGH,OR6H

LOW,OR4H

MIDDLE,OR5H

F2,OR2H

OPTION

DISPLAY

RECEIVER

GND

Vout

Vcc

SMAW-200

CN-DISP1

100,1/4W

C13L

104

R13L

66

77

44

33

55

8

77

8

5V

R12L

5.1K,1/8W

1K,1/6W

R11L

7

6

7

6

3

5

4

354

CN-OPTION

22

11

PIPE-TH

ROOM-TH

33

SMW-200

1

2

1

2

1

2

1

2

DC PART

CN-TH1

SMAW-200

4 4

OR3H

680pF/50V

OR1H

C11L

OR2H

5%

OR1H-6H

OR5H

Q04G

OR4H OR6H

R26H

R25H

R24H

R23H

R22H

OPERATION

TIMER

HIGH

MIDDLE

LOW

OPTION3

OPTION2

103

C01p

R05H

R04H

6.2K

CAT24WC01J

EEPROM

5V

R21H

5V

R02H

12.1K

10K

A0A1A2

4

3G2

1

C02HJ

C01H

R01H

103

R03H

10K

OPTION1

PIPE

ROOM TH

7

R01P

WP

SCL

SDA

5

6

20K

5V

Vcc

8

R02P

R03D

100

20K

uPD78F9166GB

NEC(16K)

FAN-IN

FAN-OUT

C08D

103

C09D

5V

1N4148

R1

Q01M

R2

D01M

SMAW-200

FAN MOTOR

INDOOR

100nM/275V,436D

TVR10561

ZNR01J

R03F

100,1/2W

R02F

680,1/2W

1N4007

D02J

VOLTAGE GND

1N4148

2

3

DC HIGH

300K,1/2W

5V

1

4

R01L

D01L

R02L

300K,1/2W

D03J

1N4007

47nM/275V/435D

C02J

C01J

40mH/1A

NF01J

D04J

1N4007

D05J

INT

56K

R05L

5V

D01J

1N4007

R14L

1K 20K

R15L

5V

10K,1/6W

C03T

R01F

560,1/4W

INDOOR FAN

12V

3

2

4

1

5

GND

12V

5V

33

22

11

44

55

250V/T2A

FUSE

RY-4WAY

RY-FAN

4

3

CN-N2

CN-N1

3

4

RY-COMP

G4A-1A-E-LG

1 1

112

3

132

1

100nM/275V/436D

T2

T1

TVR10561

ZNR01F

120,1/2W

C01F

R04F

CN-4WAY

CN-MOTOR

321

4

3

MOTOR

COMPRESSOR

R01P

AC220-240V

50/60HZ

1(L)

52431

34251

4WAY

2N

MOTOR

OUTDOOR FAN

SH-CAPACITOR

33

103

C01A

OSC01B

CRTL4.00MSOT

10uF/50V

C02A

R01A

1K

+

R01B

1M

103

C07D

5V

7

8

9

10

4.7K

S7136

IC01A

KIA7036P

3.6V

100

R03A

3

5V

2

1

CN-CENT

R02A

12V

55

34

11

5

4

12

13

6

2

14

15

3

16

1

INDOOR FAN

RY-COMP

22

11

SMAW-200

CN-U/D

RY-FAN

REALY CONNECTION

STEPPING MOTOR

(UP/DOWN)

IC01F

IL440-2

TR01F

SM1L43

Electric Control Device

• Heat Pump Model(LED TYPE)

- 38 -

LGE Internal Use Only

Wiring Diagram

Schematic Diagram

Indoor Unit

Models: AS-H0966KA2 (F09AHJ), AS-H126RKA2 (F12AHJ), AS-H186TKA2 (F18AHJ),

AS-H246TKA2 (F24AHJ)

Outdoor Unit

Models: AS-H0966KA2

(F09AHJ), AS-H126RKA2 (F12AHJ)

Models: AS-H186TKA2

(F18AHJ)

Models: AS-H246TKA2

(F24AHJ)

C

SR

RD

YL

GN/YL

GN/YLBRBLBKRD

YL

BR(OR)

BL

BK

FAN MOTOR

BR BL BK RD

HEATER

RD

BR

BRWH

BK(RD)

BK(RD)RD

T/B1

T/B3

T/B4

T/B2

REVERSING

VALVE

TERMINAL BLOCK

TO INDOOR UNIT

3854A20167Q

RY-S/CAPA

RY-COMP

SOFT STARTER PCB

COMP.

START CAPACITOR

OPTION

PTC

CAPACITOR

4

H

CF

3

43

1(L) 2(N)

34

- 39 -

LGE Internal Use Only

Schematic Diagram

Components Location

MAIN P.W.B ASSEMBLY

Q02G

R01E

Q01L

J19

R04L

C01L

J18

Q04G

BZ01E

C11L

J23

Q03G

J24

J22

R11L

CN-CENT

J21

J20

R15L

CN-OPTION

J8

D01J

OSC01B

R02E

C08D

J14

C05D

L02D

J13

IC01D

R02D

C06D

C02D

C03D

R01F

D01D

C02A

IC01A

J12

R14L

C04D

C14L

C03T

R01A

J17

R03A

R02A

R01D

L01D

J16

J11

J25

C01A

C01D

C05J

SMPS

C04J

R01J

C03J

D06J

R02J

R02L

C06J

D01L

NTC

D05J

IC01J

D04J

D03J

IC01F

R03F

TR01F

R02F

R01P

R02P

Q01G

1

12

R01B

23

MICOM

R03D

34

R03L

R05L

C07D

J9

J7

EEPROM

J01

J16

C09D

J15

R25H

R24H

R23H

R22H

R26H

C01P

IC01M

J6

J5

J4

Q01M

ZNR01J

IC01L

R01L

RY-4WAY

RY-FAN

D02J

C01J

C02J

C01F

NF01J

CN-U/D

CN-DISP1

C01H

OR4H

OR2H

R21H

OR1H

OR3H

J26

OR5H

OR6H

R03H

C12L

R12L

R05H

D01M

J2

C02H

R01H

R02H

R04H

CN-TH1

FUSE

CN-4WAY

RY-COMP

CN-MOTOR

ZNR01F

R04F

CN-N2

CN-N1

FUSE

250V/T2A

RY-COMP

PWB: 6870A90239A

D03J

IC01F

C03J

R02F

TR01F

R03F

NTC

D04J

CN-MOTOR

ZNR01F

D02J

R04F

C01F

CN-N2

NF01J

CN-N1

3

D01J

C02D

R02D

PWB ASM: 6871A20573

C04J

5

R01J

SMPS

8

D01D

R02L

D05J

4

C05J

IC01J

D06J

R02J

1

J11

C06J

D01L

C01D

C06D

C03D

R01F

C05D

IC01D

Q01L

J13

C14L

J12

IC01A

L01D

C02A

C04D

R01A

J14

R14L

R04L

C03T

BZ01E

C01L

J5

J4

C07D

R01L

ZNR01J

C01J

C02J

RY-4WAY

R03L

IC01L

RY-FAN

J7

J6

R03D

C08D

OSC01B

C01A

J9

C11L

R11L

J15

C09D

C01P

J01

J10

CN-CENT

4

D01M

CN-4WAY

J2

CN-U/D

J8

C01H

CN-TH1

C02H

CN-OPTION

C12L

CN-DISP1

• TOP VIEW

• BOTTOM VIEW

- 40 -

LGE Internal Use Only

Schematic Diagram

DISPLAY ASSEMBLY

– 6871A20575

- 41 -

LGE Internal Use Only

Troubleshooting Guide

INDOOR UNIT OUTDOOR UNIT

HEAT EXCHANGE (EVAPORATOR)

HEAT EXCHANGE (CONDENSER)

COMPRESSOR

ACCUMU LATOR

GAS SIDE

3-WAY VALVE

LIQUID SIDE

3-WAY VALVE

CAPILLARY TUBE

CHECK VALVE

(Heating Model only)

COOLING HEATING

REVERSING VALVE (Heating Model Only)

(1) Cooling Only Models

Refrigeration Cycle Diagram

(2) Cooling & Heating Models

- 42 -

LGE Internal Use Only

Troubleshooting Guide

2-way, 3-way Valve

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

Shaft position Shaft position Service port

Closed Closed Closed

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

Open Closed Open

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

vacumm pump)

Open Open Closed

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

Closed Open Open

(clockwise) (counter-clockwise) (connected manifold

gauge)

Open Open Open

(with charging

cylinder)

Open Open Open

(with charging

cylinder)

Open Open

Works

Shipping

Air purging (Installation)

Operation

Pumping down (Transfering)

Evacuation (Servicing)

Gas charging (Servicing)

Pressure check (Servicing)

Gas releasing (Servicing)

1.

2.

3.

4.

5.

6.

Valve cap

Open position Closed position

Service port

Service port cap

To outdoor unit

Flare nut

To piping connection

To outdoor unit

Hexagonal wrench (4mm)

Open position Closed position

To piping connection

Flare nut

Open

(with charging cylinder)

Open

(with charging cylinder)

- 43 -

LGE Internal Use Only

Troubleshooting Guide

• 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/cm2g.

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

position.

– Do this quickly so that the gauge ends up indi-

cating 3 to 5kg/cm2g.

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

way and 3-way valve’s stem nuts and the service port nut.

– Use torque wrench to tighten the service port

nut to a torque of 1.8 kg.m.

– Be sure to check for gas leakage.

Lo

Closed

Purge the air

Outdoor unit

Indoor unit

Liquid side

Gas side

CLOSE

Open

2-Way valve

3-Way valve

CLOSE

Pumping Down

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.

- 44 -

LGE Internal Use Only

Troubleshooting Guide

Balance Refrigerant of the 3-way Valve

(Gas leakage)

• Procedure

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

are set to the back seat.

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

port.

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

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

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

– If there is no air in the refrigerant cycle (the

pressure when the air conditioner is not running is higher than 1 kg/cm2G), discharge the refrigerant until the gauge indicates 0.5 to 1 kg/cm

2

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

sary to apply a evacuatin.

– Discharge the refrigerant gradually; if it is dis-

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

Lo

Open

3-Way valve

Gas side

CLOSEOPEN

Outdoor unit

Liquid side

Indoor unit

- 45 -

LGE Internal Use Only

Troubleshooting Guide

Evacuation

(All amount of refrigerant leaked)

• Procedure

(1) Connect the vacuum pump to the center hose

of charge set center hose

(2) Evacuation for approximately one hour.

– Confirm that the gauge needle has moved

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

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

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

(4) Disconnect the charge hose from the vacuum

pump.

– Vacuum pump oil.

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

Lo

Open

Vacuum pump

3-Way valve

Outdoor unit

Liquid side

Indoor unit

Gas side

3-Way valve

CLOSE

OPEN

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

- 46 -

LGE Internal Use Only

Troubleshooting Guide

Gas Charging

(After Evacuation)

• Procedure

(1) Connect the charge hose to the charging

cylinder.

– Connect the charge hose which you dis-con-

nected from the vacuum pump to the valve at the bottom of the cylinder.

– If you are using a gas cylinder, also use a

scale and reverse the cylinder so that the system can be charged with liquid.

(2) Purge the air from the charge hose.

– Open the valve at the bottom of the cylinder

and press the check valve on the charge set to purge the air. (Be careful of the liquid refrigerant). The procedure is the same if using a gas cylinder.

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

charge the system with liquid refrigerant.

– If the system can not be charged with the spec-

ified amount of refrigerant, it can be charged with a little at a time (approximately 150g each time) while operating the air conditioner in the cooling cycle; however, one time is not sufficient, wait approximately 1 minute and then repeat the procedure (pumping down-pin).

(4) Immediately disconnect the charge hose from

the 3-way valve’s service port.

– Stopping partway will allow the gas to be dis-

charged.

– If the system has been charged with liquid

refrigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose.

(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.

\

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.

Lo

Charging cylinder

Outdoor unit

Indoor unit

Liquid side

Gas side

CLOSE

Open

3-Way valve

OPEN

Open

Check valve

(1)

- 47 -

LGE Internal Use Only

Troubleshooting Guide

Additional gas charging

(Gas leakage)

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

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

The method of using graph

- Find outdoor temperature.

- Find indoor temperature onto the curve of outdoor temperature.

- Read suction pressure at the axis of ordinates.

The method of using equation

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

13

(At operating the Unit for 10 minutes)

Suction Pressure

(Kg/cm

2

.g)

Outdoor Temp.

(˚C)

Indoor Temp. (˚C)

12

11

10

9

8

7

6

5

5 10152025303540

50˚C

40˚C

30˚C

20˚C

10˚C

0˚C

P = 3 + 0.0123 x Tout

1.5

+ 0.8 x Tin

0.5

Where, P : Suction Pressure(kg/cm

2

.

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

Operating Suction Pressure

(According to Indoor & Outdoor Temperature)

- 48 -

LGE Internal Use Only

Troubleshooting Guide

Trouble analysis

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

Temp. Difference

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

rated current

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

rated current

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

current

Temp. difference : over 8°C

Operating Current

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

• Refrigerant leakege

Clog of refrigeration cycle Defective compressor

• Excessive amount of refrigerant

• Normal

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.

1. The suction pressure is usually 8.5~9.5 kg/cm2G(Cooling) at normal condition.

2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty.

NOTICE

Suction pressure Temperature

(Compared with (Compared with Cause of Trouble Description

the normal value) the normal valve)

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

Excessive amount of High pressure does not quickly

Normal refrigerant rise at the beginning of

operation.

Insufficient amount of Current is low.

Lower Higher refrigerant (Leakage)

Clogging Current is low.

High

Higher

Cycle Parts

- 49 -

LGE Internal Use Only

Troubleshooting Guide

Electronic Parts

Product does not operate at all.

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

Turn off Main Power

Turn on Main Power

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

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 the connection housing for contacting

• Connector related to CN-TAB1, RY-COMP NO.3

• Connector related to CN-MOTOR

• Connector contacting of Outdoor Fan/Compressor

• Display PCB Assembly Check

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

Main PCB Board Operation Check

Items

• SMPS Transformer (Indoor unit)

- Input Voltage

- Output Voltage(ZD02D)

• IC04D(7805) Output (Indoor/Outdoor unit)

• IC01A(KIA7036, Reset IC) X01(8MHz)

• Replace Trans

• Replace IC04D

• Replace faulty parts

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

- About DC12V

• DC +5V

• Voltage of Micom No. 2,

(DC +4.5V over) and Soldering condition.

Content Remedy

NO

YES

(After 10 seconds)

- 50 -

LGE Internal Use Only

Troubleshooting Guide

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.

Caused by other parts except the remote control

Cause by the remote control

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

Check the contact of CN-DISP1 connector.

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.)

Check Display PCB Assembly

- Voltage between CN DISP1 - : DC +5V

Check the connecting circuit between the remote controller MICOM (No. ) - R17(2Ω) - IR LED - TR - R16(2.2KΩ).

Check point

• Check the connecting circuit between CN-DIS1 R01L(5.1kΩ) - C01L(680pF) - MICOM PIN

• Check Receiver Assembly

- 51 -

LGE Internal Use Only

Troubleshooting Guide

Compressor/Outdoor Fan are unable to drive.

Turn on Main Power

Operate "Cooling Mode( )" by setting the desired temperature of the remote controller is less than one of the indoor temperature by 1°C at least.

When in Air Circulation Mode, Compressor/Outdoor Fan is stopped.

Check the sensor for indoor temperature is attached as close as to be effected by the temperature of Heat Exchanger(EVA).

When the sensor circuit for indoor temperature and connector are in bad connection or are not engaged, Compressor/Outdoor Fan is stopped.

• Check the related circuit of RY-FAN.

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

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.

Check Relay(RY - COMP) for driving compressor.

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

• Check the circuit related to the relay.

Check point COMP ON COMP OFF

Between Micom(No.

DC5V DC0V

62) and GND

Between IC01M(No. 14) Below DC 1V

About DC12V

and GND (app)

- 52 -

LGE Internal Use Only

Troubleshooting Guide

Check the TRIAC high speed operation by remote control.

(The Indoor Fan Motor is connected)

Turn off Main power

Check the connection of CN-MOTOR

Check the Fan Motor

Check the Fuse(AC250V/T2A)

Turn ON Main Power

Check the related circuit of indoor Fan Motor.

• The pin NO 63 of Micom, and the part for driving TRIAC(the input and output signal of IC01M, PIN NO 7, 10)

• 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.

When indoor Fan does not operate.

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

About AC 180V over About AC 50V over

TRIAC is not damaged TRIAC Check

- 53 -

LGE Internal Use Only

Troubleshooting Guide

• 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

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 Vertical Louver does not operate.

Check the operating circuit of the Vertical Louver

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

GND.

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

- Between , , and of MICOM

- Between , , and of IC01M

60 61 62 63

- 54 -

LGE Internal Use Only

Troubleshooting Guide

When Heating does not operate

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

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

Check the connector of intake and pipe sensor(thermistors)

• Check the related circuit of RY-4WAY

• Check the indoor room temperature is disconnected or not (about 10KΩ/at 25°C).

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

5KΩ/at 25°C).

Turn ON Main Power

Check the DC voltage on the PWB ASSEMBLY

• The details of check are as followings

Check point

Between Micom

(NO.59) and GND

Between IC01M

(NO.11) and GND

Comp ON

DC 5V

Below DC 1V

Comp OFF

DC 0V

About DC

12V

Check point

Between Micom

(NO.51) and GND

Between IC02M

(NO.11) and GND

4 way ON

DC 5V

Below DC 1V

4 way OFF

DC 0V

About DC 12V

Check point

Between Micom

(NO.53) and GND

Between IC02M

(NO.12) and GND

Fan ON

DC 5V

Below DC 1V

Fan OFF

DC 0V

About DC 12V

• Comp Relay.

• 4 way Relay

• Outdoor fan Relay

- 55 -

LGE Internal Use Only

Troubleshooting Guide

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.

- 56 -

LGE Internal Use Only

Exploded View

346810

146811

131410

359011

342800

147581

354210

268711A

135311

135316

267110

249951

733010

135313

152302

35211B

135516

352150

W0CZZ

Indoor Unit

- 57 -

LGE Internal Use Only

Exploded View

554031

437212

435511

552202

552116

552201

554160

561410

549610

552113

550140

552203B

552203A

430411

447910

649950

552102B

552102A

437211

435301

559010

546810

349480

Outdoor Unit: 9K,18K Btu/h Models

- 58 -

LGE Internal Use Only

Exploded View

559010

552202

552111

649950

430410

552203-2

546810

435301

437210

561410

567502

554160

552203-1

552116

447911

W0CZZ

552201

554031

237205

437212

237204

435511

550140

552102-1

Outdoor Unit: 12k Btu/h Models

- 59 -

LGE Internal Use Only

Exploded View

554032

437212

435511

668713

W0CZZ

W0CZZ-2

552202

552116

553000

554160

550140

552203-2

552203-1

430410

435301

447910

649950

552111

552201

552102-2

437210

559010

435512

546810

552102-1

567502

Outdoor Unit: 24K Btu/h Model

P/NO : 3828A20462S

MAY, 2008

LG AS-H0966KA2, F09AHJ, AS-H126RKA2, F12AHJ, AS-H186TKA2 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual