Lg Asnc091f2g0, Asnc121f2g0, Asnh091f2g1, Asnh121f2g1, Asnh121f2g0 Owner's Manual

Universal Air Conditioner

SVC MANUAL(Exploded View)

MODEL : LAN126HNP(ASNH121F2G1) LAU126HNP(ASUH121FUG1)

LAN096HNP(ASNH091F2G1) LAU096HNP(ASUH091FUG1) LAN091CNP (ASNC091F2G0) LAU091CNP (ASUC091FUG0) LAN121CNP (ASNC121F2G0) LAU121CNP (ASUC121FUG0) LAN091HNP (ASNH091F2G0) LAU091HNP (ASUH091FUG0) LAN121HNP (ASNH121F2G0) LAU121HNP (ASUH121FUG0) LA090CPI (ASNC091F2G0) LA090CPO (ASUC091FUG0) LA120CPI (ASNC091F2G0) LA120CPO (ASUC091FUG0) LA090HPI (ASNH091F2G0) LA090HPO (ASUH091FUG0) LA120HPI (ASNH121F2G0) LA120HPO (ASUH121FUG0)

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

Safety Precautions ...........................................................................................................................................................3

Dimensions .......................................................................................................................................................................9

Symbols Used in this Manual .....................................................................................................................................9

Indoor Unit ..................................................................................................................................................................9

Outdoor Unit .............................................................................................................................................................10

Product Specifications ..................................................................................................................................................11

Installation ......................................................................................................................................................................13

Installation Parts .......................................................................................................................................................13

Installation Tools.......................................................................................................................................................13

Installtion Map...........................................................................................................................................................14

Confirm the Refrigerant ............................................................................................................................................15

Select the best Locations..........................................................................................................................................16

Piping Length and Elevation .....................................................................................................................................17

Preparing Work for Installation .................................................................................................................................18

Fixing Indoor Unit......................................................................................................................................................19

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

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

Connection of piping-Indoor......................................................................................................................................21

Connection of the drain hose....................................................................................................................................22

Connection of piping-Outdoor...................................................................................................................................24

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

Connect the cable to the Indoor unit.........................................................................................................................25

Connection method of the connecting cable(Example) ............................................................................................26

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

Checking the drainage..............................................................................................................................................28

Forming the piping ....................................................................................................................................................29

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

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

Charging ...................................................................................................................................................................32

Panel front assembly ................................................................................................................................................33

Test running..............................................................................................................................................................34

How to replace picture & photograph ..........................................................................................................................36

Operation ........................................................................................................................................................................37

Functions ..................................................................................................................................................................37

The function of main control .....................................................................................................................................38

Display Function ......................................................................................................................................................44

Self-diagnosis Function ............................................................................................................................................44

Remote Control Operations ......................................................................................................................................45

Disassembly ...................................................................................................................................................................46

Indoor Unit ................................................................................................................................................................46

Schematic Diagram ........................................................................................................................................................48

Heat Pump/Cooling Only Series(Indoor Unit) ...........................................................................................................48

Heat Pump Series (Outdoor Unit).............................................................................................................................49

INDOOR UNIT P.W.B. ASSEMBLY .........................................................................................................................50

OUTDOOR UNIT P.W.B. ASSEMBLY .....................................................................................................................51

DISPLAY P.W.B. ASM..............................................................................................................................................52

Wiring Diagram .........................................................................................................................................................53

Troubleshooting Guide..................................................................................................................................................55

Refrigeration Cycle Diagram.....................................................................................................................................55

Pipe length and the elevation ...................................................................................................................................56

3-way Valve ..............................................................................................................................................................57

Cycle Parts ...............................................................................................................................................................63

Electronic Parts.........................................................................................................................................................64

Exploded View ................................................................................................................................................................73

- 3 -

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.

■ Installation

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

• There is risk of fire or electric

shock.

For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized Service Center.

• There is risk of fire or electric shock.

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

• There is risk of electric shock.

Install the panel and the cover of control box securely.

• There is risk of fire or electric shock.

Do not modify or extend the power cord.

• There is risk of fire or electric shock.

Do not install, remove, or reinstall the unit by yourself (customer).

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

- 4 -

LGE Internal Use Only

Safety Precautions

■ Operation

Be cautious when unpacking and installing the product.

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

For installation, always contact the dealer or an Authorized Service Center.

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

Do not install the product on a defective installation stand.

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

Be sure the installation area does not deteriorate with age.

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

Do not let the air conditioner run for a long time when the humidity is very high and a door or a window is left open.

• Moisture may condense and wet or damage furnishings.

Take care to ensure that power cords could not be pulled out or damaged during operation.

• There is risk of fire or electrical shock.

Do not place anything on the power cord.

• There is risk of fire or electric shock.

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

• There is risk of fire or electrical shock.

- 5 -

LGE Internal Use Only

Safety Precautions

Use a dedicated outlet for this appliance.

• There is risk of fire or electrical shock.

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

• There is risk of fire or electrical shock.

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

• There is risk of fire and electric shock.

Do not allow water to run into electric parts.

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

Do not store or use flammable gas or combustibles near the air conditioner.

• There is risk of fire or failure of product.

Do not use the product in a tightly closed space for a long time.

• Oxygen deficiency could occur.

When flammable gas leaks, turn off the gas and open a window for ventilation before turn the product on. DO NOT use the telephone or turn switches on or off.

• There is risk of explosion or fire.

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

• There is risk of electrical shock or fire

Stop operation and close the window in storm or hurricane. If possible, remove the air conditioner from the window before the hurricane arrives.

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

Thinner

Wax

- 6 -

LGE Internal Use Only

Safety Precautions

■ Installation

Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.)

• There is risk of physical injury, electric shock, or product failure.

When the product is soaked (flooded or submerged), contact an Authorized Service Center.

• There is risk of fire or eletric shock.

Ventilate the product from time to time when operating it together with a stove, etc.

• There is risk of fire or electrical shock.

Unplug the appliance before performing cleaning or maintenance.

• There is risk of electrical shock.

When the product is not be used for a long time, disconnect the power supply plug or turn off the breaker.

• There is risk of product damage or failure, or unintended operation.

Take care to ensure that nobody could step on or fall onto the outdoor unit.

• This could result in personal injury and product damage.

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

• Low refrigerant levels may cause failure of product.

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

• A bad connection may cause water leakage.

Keep level even when installing the product.

• To avoid vibration or water leakage.

90˚

- 7 -

LGE Internal Use Only

Safety Precautions

■ Operation

Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods.

• It may cause a problem for your neighbors.

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

• Avoid personal injury.

Do not install the product where it will be exposed to sea wind (salt spray) directly.

• It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation.

Do not direct airflow at room occupants. (Don't sit in the draft.)

• This could damage your health.

Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigeration system.

• There is risk of damage or loss of property.

Do not block the inlet or outlet of air flow.

• It may cause product failure.

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

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

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

• There is risk of personal injury.

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

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

- 8 -

LGE Internal Use Only

Always insert the filter securely. Clean the filter every two weeks or more often if necessary.

• A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage.

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

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

Do not drink the water drained from the unit.

• It is not sanitary and could cause serious health issues.

Use a firm stool or ladder when cleaning or maintaining the air conditioner.

• Be careful and avoid personal injury.

Replace the all batteries in the remote control with new ones of the same type. Do not mix old and new batteries or different types of batteries.

• There is risk of fire or explosion

Do not recharge or disassemble the batteries. Do not dispose of batteries in a fire.

• They may burn or explode.

If the liquid from the batteries gets onto your skin or clothes, wash it well with clean water. Do not use the remote if the batteries have leaked.

• The chemicals in batteries could cause burns or other health hazards.

■ Disuse

Safety Precautions

- 9 -

LGE Internal Use Only

Dimensions

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.

Symbols Used in this Manual

Pipe Hole

Fix Hole

Hanger Hole

H

W

D

W mm(inch) 600(23.6)

H mm(inch) 600(23.6)

D mm(inch) 146(5.7)

Model

Dimension

INDOOR UNIT

NOTICE

- 10 -

LGE Internal Use Only

Dimensions

Outdoor Unit

W

L2

L3

L1

D

H

L4

L5

Gas side

(3-way valve)

Liquid side

(2-way valve)

MODEL

9k, 12k Models

DIM unit

W mm 770(30.3)

H mm 540(21.3)

D mm 245(9.6)

L1 mm 285(11.2)

L2 mm 64(2.5)

L3 mm 518(20.4)

L4 mm 10(0.4)

L5 mm 100(3.9)

- 11 -

LGE Internal Use Only

Product Specifications

Models

Cooling Capacity kW (Min~Rating~Max) Btu/h Heating Capacity kW (Min~Rating~Max) Btu/h Power Input Cooling/Heating W Running Current Cooling/Heating A Starting Current Cooling/Heating A

EER

W/W

Btu/h.W COP W/W Power Supply Ø / V / Hz Power Factor %

Air Flow Rate

Indoor,Max

m3/min(cfm)

Outdoor,Max

m3/min(cfm)

Moisture Removal l/h Sound Level

Indoor,H/M/L dB(A)+3 Outdoor,Max dB(A)+3

Refrigerant & Charge(at 7.5m) g(oz)

Compressor

Type Model Motor Type Oil Type Oil Charge cc O.L.P Name

Fan(Indoor)

Type Motor Output W

Fan(outdoor)

Type Motor Type

Motor Output W Circuit Breaker* A Power Supply Cable No.*mm

2

Power and Transmission Cable

No.*mm2+No.mm

2

Piping Liquid Side mm(in) Connections Gas Side mm(in) Drain Hose O.D , I.D mm(in)

Indoor(W*H*D)

mm

Dimension

inch

Outdoor(W*H*D)

mm inch

Indoor kg(lbs) Net Weight

Outdoor kg(lbs) Tool Code(Chassis) Indoor + Outdoor

Temperature Control Functions Plasma Filter

Prefilter(washable/anti-fungus)

Auto Clean

CHAOS Wind(Auto Wind)

Steps, Fan/Cool/Heat

Airflow Direction Control(up&down)

Airflow Direction Control(left&right)

Remocon Type

Setting Temperature Cooling

Range Heating

Auto Operation (Micom Control)

Auto Changeover (Micom Control)

Self Diagnosis

Timer

Sleep Operation

Soft Dry Operation

Restart Delay(minute)

Deice Control(Defrost)

Hot Start

Jet Cool

Low Ambient Operation

Special Function

Network Functions

Dry Contact

Network Solution(LGAP)

PI485

2.87 3.37 2.87 3.37

9,800 11,500 9,800 11,500

- - 2.87 3.37

- - 9,800 11,500

980 1,100 980/980 1,100/1,100

9.4 10 9.4/9.4 10/10

57.0 57.0 57.0/57.0 57.0/57.0

2.93 3.06 2.93 3.06

10.0 10.5 10.0 10.5

- - 2.93 3.06

1/115/60 1/115/60 1/115/60 1/115/60

90.7 95.7 90.7 95.7

9.3(330) 9.3(330) 9.3(330) 9.3(330) 25(883) 25(883) 25(883) 25(883)

1.4 1.4 1.4 1.4

41/35/29 41/35/29 41/35/29 41/35/29

48 48 48 48

R410A, 900(31.8) R410A, 900(31.8) R410A, 900(31.8) R410A, 900(31.8)

Rotary Rotary Rotary Rotary

GK113CAA GK113CAA GK113CAA GK113CAA

PSC PSC PSC PSC

FVC68D(PVE) FVC68D(PVE) FVC68D(PVE) FVC68D(PVE)

330 330 330 330

MRA12053-12027 MRA12053-12027 MRA12053-12027 MRA12053-12027

Turbo Fan Turbo Fan Turbo Fan Turbo Fan

24 24 24 24

Propeller Propeller Propeller Propeller

AC Induction AC Induction AC Induction AC Induction

27 27 27 27 20 20 20 20

3*2.5 3*2.5 3*2.5 3*2.5

4*0.75 4*0.75 4*0.75 4*0.75

6.35(1/4) 6.35(1/4) 6.35(1/4) 6.35(1/4)

12.7(1/2) 12.7(1/2) 12.7(1/2) 12.7(1/2)

21.5,16(0.85,0.63) 21.5,16(0.85,0.63) 21.5,16(0.85,0.63) 21.5,16(0.85,0.63) 600*600*146 600*600*146 600*600*146 600*600*146

23.62*23.62*5.75 23.62*23.62*5.75 23.62*23.62*5.75 23.62*23.62*5.75 770*540*245 770*540*245 770*540*245 770*540*245

30.31*21.26*9.65 30.31*21.26*9.65 30.31*21.26*9.65 30.31*21.26*9.65

15(33.1) 15(33.1) 15(33.1) 15(33.1) 32(70.5) 32(70.5) 32(70.5) 32(70.5) SF + UL SF + UL SF + UL SF + UL

Thermistor Thermistor Thermistor Thermistor

OOOO OOOO OOOO OOOO

3/4 3/4 3/4/3 3/4/3 Auto Auto Auto Auto Auto Auto Auto Auto

Wireless LCD Wireless LCD Wireless LCD Wireless LCD

18 ~ 30 18 ~ 30 18 ~ 30 18 ~ 30

- - 16 ~ 30 16 ~ 30 OOOO OOOO OOOO

24h, On/Off 24h, On/Off 24h, On/Off 24h, On/Off

OOOO OOOO

3333

--

OO

--

OO

OOOO

----

Note: O : Applied, - : No relation * For circuit breaker rating, please conform to local standards wherever necessary.

※ Some of functions are slightly different depending upon models. ※

The specification may be subject to change without notic for purpose of improvement.

AS-C091F2G0(LA091CNP)

AS-C091F2G0(LA090CP)

AS-C121F2G0(LA121CNP)

AS-C121F2G0(LA120CP)

AS-H091F2G0(LA091HNP)

AS-H091F2G0(LA090HP)

AS-H121F2G0(LA121HNP)

AS-H121F2G0(LA120HP)

Product Specifications

- 12 -

LGE Internal Use Only

Models

Cooling Capacity kW (Min~Rating~Max) Btu/h Heating Capacity kW (Min~Rating~Max) Btu/h Power Input Cooling/Heating W Running Current Cooling/Heating A Starting Current Cooling/Heating A

EER

W/W

Btu/h.W COP W/W Power Supply Ø / V / Hz Power Factor %

Air Flow Rate

Indoor,Max

m3/min(cfm)

Outdoor,Max

m3/min(cfm)

Moisture Removal l/h Sound Level

Indoor,H/M/L dB(A)+3 Outdoor,Max dB(A)+3

Refrigerant & Charge(at 7.5m) g(oz)

Compressor

Type Model Motor Type Oil Type Oil Charge cc O.L.P Name

Fan(Indoor)

Type Motor Output W

Fan(outdoor)

Type Motor Type

Motor Output W Circuit Breaker* A Power Supply Cable No.*mm

2

Power and Transmission Cable

No.*mm2+No.mm

2

Piping Liquid Side mm(in) Connections Gas Side mm(in) Drain Hose O.D , I.D mm(in)

Indoor(W*H*D)

mm

Dimension

inch

Outdoor(W*H*D)

mm inch

Indoor kg(lbs) Net Weight

Outdoor kg(lbs) Tool Code(Chassis) Indoor + Outdoor

Temperature Control Functions Plasma Filter

Prefilter(washable/anti-fungus)

Auto Clean

CHAOS Wind(Auto Wind)

Steps, Fan/Cool/Heat

Airflow Direction Control(up&down)

Airflow Direction Control(left&right)

Remocon Type

Setting Temperature Cooling

Range Heating

Auto Operation (Micom Control)

Auto Changeover (Micom Control)

Self Diagnosis

Timer

Sleep Operation

Soft Dry Operation

Restart Delay(minute)

Deice Control(Defrost)

Hot Start

Jet Cool

Low Ambient Operation

Special Function

Network Functions

Dry Contact

Network Solution(LGAP)

PI485

2.9 3.37

9,900 11,500

2.9 3.22

9,900 11,000

1,100/1,070 1,150/1,100

9.4/9.4 10-10

57.0/57.0 57.0/57.0

2.63 2.93 910

2.71 2.93

1/115/60 1/115/60

90.7 95.7

9.3(330) 9.3(330) 25(883) 25(883)

1.4 1.4

43/35/29 43/35/29

48 48

R410A, 900(31.8) R410A, 900(31.8)

Rotary Rotary

GK113CAA GK113CAA

PSC PSC

FVC68D(PVE) FVC68D(PVE)

330 330

MRA12053-12027 MRA12053-12027

Turbo Fan Turbo Fan

24 24

Propeller Propeller

AC Induction AC Induction

27 27 20 20

3*2.5 3*2.5

4*0.75 4*0.75

6.35(1/4) 6.35(1/4)

12.7(1/2) 12.7(1/2)

21.5,16(0.85,0.63) 21.5,16(0.85,0.63) 600*600*146 600*600*146

23.62*23.62*5.75 23.62*23.62*5.75 770*540*245 770*540*245

30.31*21.26*9.65 30.31*21.26*9.65

15(33.1) 15(33.1) 32(70.5) 32(70.5) SF + UL SF + UL

Thermistor Thermistor

OO OO OO OO

2003-04-03 2003-04-03

Auto Auto Auto Auto

Wireless LCD Wireless LCD

18 ~ 30 18 ~ 30 16 ~ 30 16 ~ 30

OO OO OO

24h, On/Off 24h, On/Off

OO OO

33 OO OO OO

--

Note: O : Applied, - : No relation * For circuit breaker rating, please conform to local standards wherever necessary.

※ Some of functions are slightly different depending upon models. ※

The specification may be subject to change without notic for purpose of improvement.

AS-H091F2G1

(LA096HNP)

AS-H121F2G1

(LA126HNP)

- 13 -

LGE Internal Use Only

Installation

Installation Parts

Installation Tools

Read carefully, and then follow step by step.

Type "A" screw and plastic anchor

Type "B" screw

Remote control holder

Installation guide map

Figure FigureName

Screw driver

Electric drill

Measuring tape, Knife

Hole core drill

Spanner

Torque wrench

Ohmmeter

Hexagonal wrench

Ammeter

Leak detector

Thermometer,

Horizontal meter

Flaring tool set

Name

- 14 -

LGE Internal Use Only

Installation Map

Installation parts you should purchase.

NOTICE

(Left and right

are identical)

More than 28"(70cm)

More than

23.6"(60cm)

Sleeve Bushing-Sleeve

Putty(Gum Type Sealer)

Vinyl tape (Wide)

• To carry out the drainage test, remove the air filter and pour water into the heat exchanger.

• Apply after carrying out a drainage test.

Saddle

More than

19.6"(50cm)

Gas side piping (Optional part) Liquid side piping (Optional part) Additional drain pipe

Vinyl tape (Narrow)

Connecting cable (Optional part)

Bend the pipe as close as possible on the wall but be careful so that it may not break.

More than More than

11.8"(30cm )11.8"(30cm )

More than

11.8"(30cm )

More than More than

11.8"(30cm) 11.8"(30cm)

More than

11.8"(30cm)

More than More than

3.9"(10cm) 3.9"(10cm)

More than

7.9"(20cm)

Installation

- 15 -

LGE Internal Use Only

1. Check the quality label on the indoor and outdoor unit.

2. Make certain that the refrigerant is R-410A.

THIS PRODUCT CONTAINS R-410A REFRIGERANT

1) Different compressor oil

- R-410A(Polyol ester) / R-22(Mineral).

- Do not mix the existing mineral oil.

- Do not apply used pipe, tools and gauges covered with the existing mineral oil.

2) Absorption of moisture

-Compressorʼs oil has the high absorption rate of moisture.

3) Composition

- R-410A(R32:R125=50:50wt%). NOTE: Never mix with other refrigerants

4) High pressure.

- 1.6 times higher than R-22.

- High Pressure refrigerant may cause personal injury.

Do not handle the pipe by yourself (customer) High-pressure refrigerant may cause personal injury.

- manifold gauge ,charging and any piping tools must be dedicated to R-410A systems.

Confirm The Refrigerant

Boiling Pt.(

°C) Vapor pressure(25°C)(kg f/cnf) Vapor density(25°C)(kg/m2)

R-410A -51.4 15.9 64 R-22 -40.8 9.6 44.4

Installation

NOTICE

Example : Split type 12,000 Btu/h

Capacity

[%]

120

100

80

100

93

89

84

76

60

40

20

0 R-410A R-22

100%

70% 50% 30%

0%

100%70%50%30%0%

- 16 -

LGE Internal Use Only

Indoor unit

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

2. Select a place where there are no obstacles in front of the unit.

3. Make sure that condensation drainage can be conveniently routed away.

4. Do not install near a doorway.

5. Ensure that the interval between a wall and the left (or right) of the unit is more than 19.6"(50cm). The unit should be installed as high as possible on the wall, allowing a minimum of 7.9"(20cm) from ceiling.

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

Outdoor unit

1. 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.

2. Ensure that the space around the back and sides is more than 11.8"(30cm). The front of the unit should have more than 28"(70cm) of space.

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

4. Take the weight of the air conditioner into account and select a place where noise and vibration are minimum.

5. Select a place where the warm air and noise from the air conditioner do not disturb neighbors.

Select the best Location

CAUTION: Install the indoor unit on the wall where the height from the floor is more than 4.9 feets(1.5 meters).

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.

If the outdoor unit is installed on roof structures or walls, this may result in excessive noise and vibration, and may be also classed as non serviceable installation.

Installation

More than

19.6"(50cm)

More than

4.9ft(1.5m)

More than

7.9"(20cm)

More than

19.6"(50cm)

More than

11.8"(30cm)

More than

23.6"(60cm) More than

11.8"(30cm)

More than

28"(70cm)

More than

23.6"(60cm)

- 17 -

LGE Internal Use Only

Piping Length and Elevation

Installation

Pipe Size

Capacity

(Btu/h)

Suction

Evap

Max.

length

Ⓐ

m(ft)

Additional

Refrigerant

g/m(oz/ft)

Max.

ElevationⒷ m(ft)

9k, 12k

Ø12.7mm(1/2") Ø6.35mm(1/4")

7.5(25) 7.5(25) 15(49) 20(0.22)

CAUTION: Capacity is based on standard length and maximum allowance length is

on the basis of reliability.

Oil trap should be installed every 16.4~23feets (5~7 meters).

Standard

Length m(ft)

Indoor unit

A

B

Outdoor unit

Indoor unit

A

B

Oil trap

Indoor unit

If piping length is more than 16.4ft(5m)

Outdoor unit

A

B

- 18 -

LGE Internal Use Only

Installation

Preparing Work for Installation

Open panel front

1. Pull the upper part of the front panel.

2. Lift up the panel.

3. To detach the front panel, remove the two screws at the lower part.

4. Detach the front panel from the body.

5. To detach the panel, disconnect the connector at the upper part.

Cover pipe and cover side remove

1. Please remove the screw of the center tuning cover.

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

3. Pick the pipe hole of the side cover.

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

When making pipe path through rear wall, you donʼt need to pick the pipe hole.

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.

Panel Front

Connector

Side cover

Pipe hole

Only the

desired direction

rubber cap

Only the

desired direction

Connecting

part

Adhesive

Drain hose

NOTICE

- 19 -

LGE Internal Use Only

Installation

Fixing Indoor Unit

• 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.

Drill a Hole in the Wall

5-7mm

(0.2~0.3")

Indoor

WALL

Outdoor

Plastic anchors

INSTALLATION GUIDE MAP

10mm

INSTALLATION GU

I

N

S

T

A

I

A

T

I

ON GUI

DE

M

A

P

Plastic anchors

INSTALLATION

GU

ID

E M

A

P

I

N

STA

LLATI

O

N

G

U

I

D

E MA

P

Hanger hole

(Rear side of

the product)

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

5. Drive the fore plastic anchors into drilled points.

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

9. Check the fixed product with light power.

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

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

4.

Drill the pierted part as a diameter of 50mm

for connecting piping. (In case of piercing rear surface)

6.

First, Drive the two points of the upper

parts by screws. (Leave 10mm for hanging the product)

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

10.

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

I

Horizontality

NSTAL

LA

TION G

UI

DE

M

AP

- 20 -

LGE Internal Use Only

Flaring work and connection of piping

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 4.9ft(1.5m) longer than the pipe length.

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.

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

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.

Copper

pipe

90°

Slanted Uneven Rough

Pipe

Reamer

Point down

Flare nut

Copper tube

mm inch mm Ø6.35 1/4 1.1~1.3 Ø9.52 3/8 1.5~1.7 Ø12.7 1/2 1.6~1.8

Ø15.88 5/8 1.6~1.8 Ø19.05 3/4 1.9~2.1

Outside diameter A

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

- 21 -

LGE Internal Use Only

Flaring work and connection of piping

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.

Indoor

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

CAUTION: 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.

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

2. 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.

Inclined

Inside is shiny without scratches

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

Connecting the Piping

Drain hose

Connecting cable

Gas side piping

Liquid side piping

Drain hose

Loop

- 22 -

LGE Internal Use Only

Connecting the piping 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.

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

install the drain pipe.

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.

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.

Flaring work and connection of piping

mm inch kgf.cm Ø6.35 1/4 180~250 Ø9.52 3/8 340~420 Ø12.7 1/2 550~660

Outside diameter Torque

Wrap with vinyl tape

Drain hose

Pipe

Vinyl tape(wide)

Indoor unit tubing Flare nut Pipings

Torque wrench

Indoor unit tubing

Spanner (fixed)

Connection pipe

Flare nut

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

- 23 -

LGE Internal Use Only

Flaring work and connection of piping

CAUTION: Installation Information

For right piping. Follow the instruction below.

Good case

• Press on the upper side of clamp and unfold the tubing to downward slowly.

Bad case

• Following bending type from left to right may cause damage to the turbing.

- 24 -

LGE Internal Use Only

Flaring work and connection of piping

Put a couple drops of refrigerant oil on the face of the flare before assembling taking care not to add any contaminants.

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.

mm inch kgf.cm Ø6.35 1/4 180~250 Ø9.52 3/8 340~420 Ø12.7 1/2 550~660

Ø15.88 5/8 630~820 Ø19.05 3/4 980~1210

Outside diameter Torque

Outdoor unit

Liquid side piping (Smaller diameter)

Gas side piping (Bigger diameter)

Torque wrench

Connection of Piping -Outdoor

- 25 -

LGE Internal Use Only

Connecting the cable between indoor unit and outdoor unit

Connecting the Cables

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

2. Dismount caps on the conduit panel.

3. Temporarily mount the conduit tubes on the conduit panel.

4. Properly connect both the power supply and low voltage lines to the corresponding terminals on the terminal block.

5. Ground the unit in accordance with local codes.

6. Be sure to size each wire allowing several inches longer than the required length for wiring.

7. Use lock nuts to secure the conduit tubes.

Connector trade size for this unit is 1/2"(12.7mm). Refer to "How to connect wiring to the terminals" for instructions on connecting depending on the wire type you are using.

WARNING:

• Be sure to comply with local codes while

running the wire from the indoor unit to the outdoor unit(size of wire and wiring method, etc).

• Every wire must be connected firmly.

• No wire should be allowed to touch

refrigerant tubing, the compressor or any moving parts.

Power Supply

1

Indoor Unit Outdoor Unit

2

3

4

1

2

3

4

5

6

G

To branch circuit

Ground

Power supply

a

L1

*

L2

Connecting cable(Low voltage)

b

Terminal

(4P)

Terminal

(6P)

Wiring Diagram

*

L1 is neutral for 115V models.

Outdoor unit

Terminal block

Over 5mm

(0.2")

Cover control

Conduit panel

Connecting

cable

Power supply

cord

1. shows field wiring.

2. Separately wire the high and low voltage line.

3. Use heat-proof electrical wiring capable of withstanding temperatures up to 167°F(75°C).

4. Use outdoor and waterproof connection cable rated more than 300V for the connection between indoor and outdoor unit. (For example, Type SJO-WA)

Model

9k/12k

1Ø, 115V

14 18 20A

Power source

Fuse or breaker

Capacity

AWG(MIN)

ⓐⓑ

NOTICE

- 26 -

LGE Internal Use Only

Connecting the cable between indoor unit and outdoor unit

Connection method of the connecting cable(Example)

1. Dismount two-caps on the conduit panel.

2. Make a hole appropriate for the passage of connection cable through on cap by tool. (for low voltage line)

3. Pass the connecting cable through the hole.

4. Properly connect the cable on the terminal block.

5. Fix the connection cable with clamp cord provided on the unit not to have strain at the terminal when the connection cable is pulled outside up to a 35 pound weight.

6. Wind the vinyl tape round the connecting cable for sealing between the surface of the connection cable and cap.

7. Mount the taped part of cable on the cap.

8. Finally, mount the holed cap with the wound cable on the conduit panel.

WARNING:

Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire hazard may also exist. Therefore, be sure all wiring is tightly connected.

When connecting each power wire to the corresponding terminal, follow instructions "How to connect wiring to the terminals" and fasten the wire tightly with the fixing screw of the terminal plate.

How to connect wiring to the terminals

• For solid core wiring (or F-cable)

1. Cut the wire end with a wire cutter of wire-cutting pliers, then strip the insulation to expose the solid wire about 25mm(15/16")

2. Using a screwdriver, remove the terminal screw(s) on the terminal plate.

3. Using pliers, bend the solid wire to from a loop suitable for the terminal screw.

4. Shape the loop wire properly, place it on the terminal plater and tighten securely with the terminal screw using a screwdriver.

• For strand wiring

1. Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insulation to expose the strand wiring about 10mm(3/8").

2. Using a screwdriver, remove the terminal screw(s) on the terminal plate.

3. Using a round terminal fastener or pliers, securely clamp each stripped wire end with a round terminal.

4. Position the round terminal wire, and replace and tighten the terminal screw using a screwdriver.

G

Terminal block

Cap (Remove)

Clamp cord

Lock nut

Conduit panel

Cap(Reuse)

Taping

(for sealing)

Low voltage line

(connecting cable)

Power supply line (1ø, 115V, 208/230V)

Hole

(for low

voltage line)

Loop

Round terminal

Insulation

Strip 25mm(15/16")

Strip 10mm(3/8")

Solid wire

Strand wire

Screw with special washer

Round terminal

Terminal plate

Wire

Round terminal

- 27 -

LGE Internal Use Only

Connecting the cable between indoor unit and outdoor unit

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

1)

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

2) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from

vibrations to which the unit is subjected during the course of transportation. Check them and make sure that they are all tightly fastened. (If they are loose, it could cause burn-out of the wires.)

3) Specification of power source.

4) Confirm that electrical capacity is sufficient.

5) Confirm 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.

7) Always install an GFCI 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, open fuse, 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(0.12in) in each active(phase) conductors.

CAUTION

- 28 -

LGE Internal Use Only

Checking the drainage and forming the pipings

Checking the Drainage

To check the drainage.

1. Pour a glass of water on the evaporator.

2. Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit.

Drain piping

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

2. Do not make drain piping like the following.

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

(mm2)

- 29 -

LGE Internal Use Only

Checking the drainage and forming the pipings

Forming the Piping

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

• If you want to connect an additional drain hose, the

end of the drain outlet should be routed above the ground. Secure the drain hose appropriately.

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

1. Tape the piping, drain hose and connecting cable

from down to up.

2. Secure the tapped piping along the exterior wall

using saddle or equivalent.

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

1. Tape the piping and connecting cable from down to

up.

2. Secure the taped piping along the exterior wall. Form

a trap to prevent water entering the room.

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

Taping

Drain hose

Pipings

Connecting cable

Trap is required to prevent water from entering electrical parts.

Seal small openings around pipings with a gum type sealer.

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

Trap

- 30 -

LGE Internal Use Only

Air purgingd

AIR PURGING

Air Purging

Air purging

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

1. Pressure in the system rises.

2. Operating current rises.

3. Cooling(or heating) efficiency drops.

4. Moisture in the refrigerant circuit may freeze and block capillary tubing.

5. Water may lead to corrosion of parts in the refrigeration system. Therefore, after evacuating the system, take a leak test for the piping and tubing between the indoor and outdoor unit.

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.

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.

1. 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.

2. 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.

Lo Hi

Indoor unit

Outdoor unit

Manifold valve

Charge hose

Nitrogen gas cylinder(in vertical standing position)

Pressure gauge

- 31 -

LGE Internal Use Only

Air purgingd

Soap water method

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

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

3. To open the 2-way valve turn the valve stem counterclockwise approximately 90°, wait for about 2~3 sec, and close it.

4. Apply a soap water or a liquid neutral detergent on the indoor unit connection or outdoor unit connections by a soft brush to check for leakage of the connecting points of the piping.

5. If bubbles come out, the pipes have leakage

Evacuation

1. 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.

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

Finishing the job

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

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

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

4. 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.

5. 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.

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

- 32 -

LGE Internal Use Only

Air purgingd

Charging

■ Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a 7.5m(25ft) line set.

Any time a line set is used either shorter or longer then the nominal 7.5m(25ft) line set length the refrigerant charge has to be adjusted.

■ Whether the line set is made shorter or longer you must adjust the charge based on how many ft of tubing are

either added or removed based on 20g(0.22oz) of R-410A per meter(foot).

Example: A 30ft line set is used

5 additional ft X 0.22 ounce per foot= add 1.1 ounces of R-410A

Important:

If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge using the unit nameplate charge adjusting for line sets longer or shorter than 7.5m(25ft).

Confirm the refrigerant R-410A. Use manifold gauge and hose for R-410A.

Pipe Size

Capacity

(Btu/h)

Suction

Evap

Max.

length Ⓐm(ft)

Additional

Refrigerant

g/m(oz/ft)

Max.

Elevation Ⓑm(ft)

Standard

Length m(ft)

9k, 12k

Ø12.7mm(1/2") Ø6.35mm(1/4")

7.5(25) 7.5(25) 15(49) 20(0.22)

- 33 -

LGE Internal Use Only

Air purgingd

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 panel front, and match the lower part of panel front.

3. Screw up panel front, and suspend the

hook of panel front in the groove.

Panel Front

Connector

Panel Front Assembly

- 34 -

LGE Internal Use Only

Test running

TEST RUNNING

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

Outside ambient

TEMP.

Refrigerant

The pressure of the

gas side service valve.

1. Check that all tubing and wiring are 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.

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

batteries.

• Remove the batteries from the remote controller if the

system is not used for a long time.

Settlement of outdoor unit

1. Anchor the outdoor unit with a bolt and nut(ø0.39"(ø10mm)) tightly and horizontally on a concrete or rigid mount.

2. 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.

3. If the vibration of the unit is transmitted to the hose, secure the unit with an anti-vibration rubber.

Evaluation of the performance

Operate the 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

46.4°F(8°C)

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

The air conditioner is now ready for use.

Bolt

Tubing connection

Discharge temperature

Discharge air

Intake temperature

Test Running

NOTICE

- 35 -

LGE Internal Use Only

Test running

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.

PUMP DOWN

This is performed when the unit is relocated or the refrigerant circuit is serviced.

Pump Down means collecting all refrigerant into the outdoor unit without the loss of refrigerant.

CAUTION: Be sure to perform Pump Down procedure in the 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 in the manifold hose using the refrigerant.

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

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/cm

2

G(14.2 to 7.1 P.S.I.G.), fully close the gas side valve and then quickly turn off the unit. Now Pump Down procedure is completed, and all refrigerant is collected into the outdoor unit.

NOTICE

- 36 -

LGE Internal Use Only

How to replace picture & photograph

1.

Turn off power and then open the upper part of front panel.

2.

Pull out the both links of lower part of front panel, as described in the below picture.

3.

Push and close the top part of the front panel and then pull the bottom part of the panel forward until it is secured.

4.

Take out picture.

5.

Turn upside-down of the picture and turn over mat, then take off a protective tape attached at the mat.

6.

Place the picture/photograph between the exited picture and mat. (Recommended size of a photo/picture: 450mm x 450mm)

7.

Cover mat and press down with hand(s) until contacting closely.

8.

Slide the photo graph/drawing requested under both hanger parts as following, and fix them. Press the front panel lightly to close.

9.

Push both links of lower part of panel inside and fix it. Then turn on.

In case a mat is not used, recommended size of a photo/picture: 522mm x 522mm

When powering on after replacing filter and picture, the front panel doesn't intervene.

Mat

450mm

522mm

Mat

Protective tape

- 37 -

LGE Internal Use Only

Operation

Indoor Unit

Operation ON/OFF by Remote controller

Sensing the Room Temperature

Room temperature control

Starting Current Control

Time Delay Safety Control

Indoor Fan Speed Control

Operation indication Lamps (LED)

Healthy Dehumidification Mode

Sleep Mode Auto Control

Auto Air Control by the unit electronic control

Chaos Swing

Defrost control(Heating)

Hot-start Control (Heating)

• Room temperature sensor (THERMISTOR)

• Maintains the room temperature in accordance with the Setting Temp.

• Indoor fan is delayed for 5 seconds at the starting.

• Restarting is inhibited for approx. 3 minutes.

• High, Med, Low and Auto

• Intermittent operation of fan at low speed

• Both the indoor and outdoor fan stops during defrosting.

• Hot start will be operated after defrosting ends.

• The indoor fan stops until the indoor pipe temperature will be reached at 82°F(28°C).

• The fan is switched to low(Cooling), med(Heating) speed.

• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.

• The fan is switched to intermittent or irregular operation.

• The fan speed is automatically switched from high to low speed.

• The louver can be set at the desired position or swing up and down automatically.

--- Lights up in operation

Functions

- 38 -

LGE Internal Use Only

The function of main control

INTAKE AIR TEMP.

SETTING TEMP. +1

°

F

(Compressor ON)

SETTING TEMP. -1

°

F

(Compressor OFF)

Setting fan speed

More than 3 minutes

Setting fan speed

COMPRESSOR ON OFF ON OFF ON

INDOOR FAN SPEED Low Low

■ Protection of the indoor heat exchanger from frosting

• Compressor and outdoor fan stop when indoor pipe temperature is below 32°F(0°C) and restart at the pipe temperature is above 45°F(7°C).

3. Cooling Operation Mode

• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote control and the operation diagram is shown below.

CLOSED

OPEN

< Cooling Mode >

8°

CLOSED

OPEN

< Heating Mode >

8°

1. Time delay Safety Control

• 3min.; The compressor operation is delayed for 3 minutes to balance the pressure of cycle. (Protection of compressor)

• 5sec.;

The indoor fan is delayed for 5 seconds, when operating initially, to prevent noises occurred by the vertical louver and wind.

• 2min.; The reversing valve is delayed for 2 minutes to prevent the refrigerant-gas for abnormal noise when the heating operation is OFF or switched to the other operation mode while compressor is off.

While compressor is running, it takes 3~5 seconds to switch.

2. 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.

• While in Chaos Swing mode, the angles of cooling and heating cycle operations are different.

Operation

- 39 -

LGE Internal Use Only

. Auto Operation (Electronic control mode)

• The operation procedure is shown below. (Cooling & Heating Model)

❋ If initial mode is decided, that mode is continued without the room temperature changing.

■ Auto Operation for Cooling

Press Start/Stop Button

Select Auto Operation Mode

Check the Room temperature

Operation mode Indoor fan speed are decided automatically by the unit electronic control. Setting temperature

Intake-air

temperature

Operation Mode

Over below 70

°

F76

°

F

Soft Dry

below 70

°

F

Heating

Over 76

°

F

Cooling

~

INTAKE AIR TEMP.

SETTING TEMP. +1°F (Compressor OFF)

SETTING TEMP. -1°F (Compressor ON)

COMPRESSOR ON OFF ON OFF

INDOOR FAN SPEED The electronic control operation

Intake-air Temperature Setting Temperature

Over 78°F 77°F

Over 76°F~below 78°F Intake air -1°C

Over 72°F~below 76°F Intake air -0.5°C

Over 68°F~below 72°F Intake air temperature

below 64°F 64°F

Over 64°F~below 86°F Electronic control

below 64°F 64°F

over 86°F 86°F

Operation Condition

When Auto Operation initial start

Controlled by the electronic control

In this mode, when pressing the vertical air direction control button, vertical louver swings up and down automatically.

Fan Speed Air Direction Control

When pressing room temperature setting button during Auto Operation

Operation

- 40 -

LGE Internal Use Only

Operation

■

Auto Operation for Dehumidification(only Heating Model)

• The Setting temperature will be same that of the auto operation for cooling.

- Compressor ON temperature; Setting temperature +2°F

- Compressor OFF temperature; Setting temperture -1°F

■

Auto Operation for Heating(only Heating Model)

- Compressor ON temperature; Setting temperature

- Compressor OFF temperature; Setting temperature +6°F

Intake-air temp. below 68°F Over 68°F~below 70°F over 86°F

Setting temp. 68°F Intake air temperature +1°F 86°F

■

Vertical louver auto operation

: During Auto Operation, pressing the chaos swing button makes the

horizontal louvers swing up and down automatically. If you want to stop auto-swing, press chaos swing button again.

5. Healthy Dehumidification

• 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.

79°F ≤ Intake Air Temp ➲ 77°F 75°F ≤ Intake Intake Air Temp<79°F ➲ Intake Air Temp-2°F 64°F ≤ Intake Intake Air Temp<75°F ➲ Intake Air Temp-1°F Intake Air Temp<64°F ➲ 64°F

• 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+1°F Compressor OFF Temp. ➲ Setting Temp-1°F

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

- 41 -

LGE Internal Use Only

Operation

6. Heating Operation Mode(only Heating Model)

The unit will operate according to the setting conditions by the remote controller. The operation diagram is shown below.

INTAKE AIR TEMP.

SETTING TEMP. +6

°

F

(Compressor OFF)

SETTING TEMP. (Compressor ON)

Selecting fan speed

A

B

A

minimum

10sec.

minimum

1 min.

minimum

10sec.

COMPRESSOR ON OFF ON OFF

• A point; While the indoor pipe temperature is higher than 95°F, indoor fan operates at low speed. When the indoor pipe temperature becomes lower than 95°F, indoor fan stops.

• B point; When the indoor pipe temperature is higher than 100°F(38°C), fan operates at selected fan speed.

INDOOR FAN SPEED

Low

OFF

Low Low OFF

OFF OFFLOW

ON

Selecting fan speed

INDOOR PIPE

TEMP.

82°F

78°F

1min

INDOOR FAN SPEED

COMPRESSOR

■

Hot-Start Control

• The indoor fan stops until the indoor pipe temperature will be reached at 82°F.

• During heating operation, if indoor pipe temperature falls below 78°F fan stops.

• The operation diagram is shown below.

- 42 -

LGE Internal Use Only

7. Cooling or Heating Mode with Sleep Mode Auto Control

• When selecting the Cooling( ) or the Heating( ) combined with the Sleep Mode Auto Control( ), the operation diagram is as following.

■

Cooling Mode with the Sleep Mode

• The setting temperature will be automatically raised by 2°F 30 minutes later and by 4°F 1 hour later.

• The operation will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.

■

Heating Mode with the Sleep Mode(only Heating Model)

• The operation will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.

INTAKE AIR TEMP.

SETTING TEMP. +1

°

F

(Compressor ON)

SETTING TEMP. -1

°

F

(Compressor OFF)

30 minutes

More than

3 minutes

2°F

More than

3 minutes

COMPRESSOR ON OFF ON OFF ON

INDOOR FAN SPEED Low Low Low Low Low

SETTING TEMP. +6

°

F

(Compressor OFF)

SETTING TEMP. (Compressor ON)

COMPRESSOR ON OFF ON OFF ON OFF

INDOOR FAN SPEED Med Low or OFF Med Low or OFF Med Low or OFF

INTAKE AIR TEMP.

More than

3 minutes

More than

3 minutes

More than 3 minutes

Operation

- 43 -

LGE Internal Use Only

8. 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.

Operation

9. 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. So there is no need of activating this function by pressing any key or button. In the initial mode, the fan operates at a low speed and the compressor starts 2.5~3 minutes later. As the compressor starts, the fan speed also resumes its previous setting mode.

Helpful information

Fan speed and cooling capacity.

The cooling capacity indicated in the specification is the value when the fan speed is set to high, and the capacity will be lower at low or medium fan speed.

High fan speed is recommended when you wish to cool the room quickly.

Test operation

During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of room temperature and resets in 18 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 the ON/OFF button for 3~5 seconds, then the buzzer sound 1 "beep". If you want to stop the operation, re-press the button.

Auto restart function has set enable as factory default. But customer can set up by following this instruction.

To be disable function

- Press and hold the ON/OFF button for 6 seconds, then the buzzer sound 2 "beep" and the indicator lamp (1) blinks 4 times.

To be enable function

- Press and hold the ON/OFF button for 6 seconds, then the buzzer sound 2 "beep" and the indicator lamp (1) brights 4 times.

High

Speed

ON/OFF

button

Cooling Heat pump Model

Model

Room Temp. ≥ 76°F(24°C)

70°F(21°C) ≤ Room Temp. < 76°F(24°C)

Room Temp. < 70°F(21°C)

Operating mode Cooling Cooling Healthy Dehumidification Heating

Indoor FAN Speed

High High

Healthy Dehumidification Rule

High

Setting Temperature

72°F(22°C) 72°F(22°C) 74°F(23°C) 76°F(24°C)

NOTICE

- 44 -

LGE Internal Use Only

Operation

Display Function

Self-diagnosis Function

Signal Receptor

Receives the signals from the remote control.(Signal receiving sound: two short beeps or one long beep.)

Operation Indication Lamps

On/Off : Lights up during the system operation.

3sec 3sec 3sec

(once)

3sec 3sec

(twice)

3sec

(5times)

Error

Code

1

2

5

Error LED

(Indoor body operation LED)

Error contents

• Indoor room temperature thermistor open/short

• Indoor pipe temperature thermistor open/short.

• Outdoor pipe temperature thermistor open/short.

• Poor communication.

• Indoor TH assy check

• Outdoor TH assy check

• Communication line/circuit check

SVC check point

- 45 -

LGE Internal Use Only

Operation

Controls

ON

OFF

CANCEL

SET

°C/°F

AUTO CLEAN

1

3

5

4

9

10

12

18

16

7

2

8

13

15

11

6

Cooling Operation

Auto Operation or Auto Changeover

Healthy Dehumidification Operation

Flip-up door (opened)

Heating Operation

Signal transmitter

•

Cooling Model( ), Heat Pump Model( )

17

Operation Mode

14

The controls will look like the following.

Remote Control Operations

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/heaing. (speed cooling/heating operates super high fan speed in cooling/heatig 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. NEO PLASMA(OPTIONAL)

Used to start or stop the plasma-purification function.

14. HORIZONTAL AIRFLOW DIRECTION CONTROL BUTTON (OPTIONAL)

Used to set the desired vertical airflow direction.

15. RESET BUTTON

Used prior to resetting time.

16. 2nd F Button

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

17. AUTO CLEAN (OPTIONAL)

Used to set Auto Clean mode.

18. °C/°F SWITCH BUTTON

Used to switch temperature reading from Centigrade to Fahrenheit.

- 46 -

LGE Internal Use Only

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

Communication Connector

Motor Connector

Sensor Connector

Step Motro Connector

Front Panel Connector

- 47 -

LGE Internal Use Only

Disassembly

3. To remove the Evaporator.

- Remove hole tubing holde.

- Remove 2 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, top cover and the air guide.

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.

Top Cover

Air Guide

Motor Mount

Bolt

Turbo Fan

Bracket

- 48 -

LGE Internal Use Only

Schematic Diagram

Heat Pump/Cooling Only Series(Indoor Unit)

- 49 -

LGE Internal Use Only

Schematic Diagram

Heat Pump Series/ Cooling Only Series (Outdoor Unit)

- 50 -

LGE Internal Use Only

Schematic Diagram

INDOOR UNIT P.W.B. ASSEMBLY

• P/No.: 6871A20999A (PCB ASSEMBLY, MAIN)

Top View

Bottom View

- 51 -

LGE Internal Use Only

Schematic Diagram

• P/No.: 6871A20901C (PCB ASSEMBLY, MAIN)

OUTDOOR UNIT P.W.B. ASSEMBLY

Top View

Bottom View

- 52 -

LGE Internal Use Only

Schematic Diagram

DISPLAY P.W.B. ASM

• P/No.: 6871A20921A (PCB ASSEMBLY)

- 53 -

LGE Internal Use Only

Schematic Diagram

Wiring Diagram

(1) Indoor Unit (Cooling Only Models, & Heating Models)

- 54 -

LGE Internal Use Only

Schematic Diagram

(2) Outdoor Unit(Cooling Only Models, & Heating Models)

- 55 -

LGE Internal Use Only

Troubleshooting Guide

Refrigeration Cycle Diagram

INDOOR UNIT OUTDOOR UNIT

HEAT EXCHANGE (EVAPORATOR)

HEAT EXCHANGE (CONDENSER)

COMPRESSOR

GAS SIDE

LIQUID SIDE

CAPILLARY TUBE

CHECK VALVE

COOLING HEATING

REVERSING VALVE

(1) Cooling Only Models

(2) Cooling & Heating Models

- 56 -

LGE Internal Use Only

Troubleshooting Guide

Piping Length and Elevation

Outdoor unit

Indoor unit

A

B

Outdoor unit

Indoor unit

A

B

A

Oil trap

Outdoor unit

Indoor unit

B

If piping length is more than 16.4ft(5m)

CAUTION: Capacity is based on standard length and maximum allowance length is on the basis of reliability. Oil trap should be installed every 16.4~23feets (5~7 meters).

Pipe Size

Capacity

(Btu/h)

Suction

Evap

Max.

length

Ⓐ

m(ft)

Additional

Refrigerant

g/m(oz/ft)

Max.

Elevation Ⓑm(ft)

9k, 12k

Ø12.7mm(1/2") Ø6.35mm(1/4")

7.5(25) 7.5(25) 15(49) 20(0.22)

Standard

Length m(ft)

- 57 -

LGE Internal Use Only

Troubleshooting Guide

Pumping Down

3-way Valve

• Procedure

(1) Confirm that both liquid side and gas side

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 Gas side valve.

– Connect the charge hose 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 liquid side valve to the closed position.

(6) Operate the air conditioner in cooling mode

and stop it when the gauge indicates 1kg/cm

2

g.

(7) Immediately set the Gas side 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

Liquid side and Gas side valveʼs 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

3-Way valve

CLOSE

- 58 -

LGE Internal Use Only

Troubleshooting Guide

1) Re-air purging

(Re-installation)

• Procedure

(1) Confirm that both the liquid side valve and the

gas side valve are set to the closed position.

(2) Connect the charge set and a gas cylinder to

the service port of the Gas side valve.

– Leave the valve on the gas cylinder closed.

(3) Air purging.

– Open the valves on the gas cylinder and the

charge set. Purge the air by loosening the flare nut on the liquid side valve approximately 45° for 3 seconds then closing it for 1 minute; repeat 3 times.

– After purging the air, use a torque wrench to

tighten the flare nut on liquid side valve.

(4) Check for gas leakage.

– Check the flare connections for gas leakage.

(5) Discharge the refrigerant.

– Close the valve on the gas cylinder and

discharge the refrigerant until the gauge indicates 3 to 5 kg/cm

2

g.

(6) Disconnect the charge set and the gas

cylinder, and set the Liquid side and Gas side valves to the open position.

– Be sure to use a hexagonal wrench to operate

the valve stems.

(7) 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.

* CAUTION:

Do not leak the gas in the air during Air Purging.

Lo

Closed

OPEN

Closed

Gas cylinder

Outdoor unit

Indoor unit

Liquid side

Gas side

CLOSE

3-Way valve

Refrigerant

- 59 -

LGE Internal Use Only

Troubleshooting Guide

2) Balance refrigerant of the 3-way valve

(Gas leakage)

• Procedure

(1) Confirm that both the liquid side and gas side

valves are set to the back seat.

(2) Connect the charge set to the 3-way valveʼs

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/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.

Lo

Open

3-Way valve

Gas side

CLOSEOPEN

Outdoor unit

Liquid side

Indoor unit

- 60 -

LGE Internal Use Only

Troubleshooting Guide

2. 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

- 61 -

LGE Internal Use Only

Troubleshooting Guide

3. Gas Charging

(After Evacuation)

• 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).

(4) Immediately disconnect the charge hose from

the 3-way valveʼs 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.

CAUTION

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)

- 62 -

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 (For R410A)

(According to Indoor & Outdoor Temperature)

- 63 -

LGE Internal Use Only

Troubleshooting Guide

Cycle Parts

Trouble analysis

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

Temp. Difference

Temp. difference : approx. 0˚F(0°C) Current : less than 80% of

rated current

Temp. difference : approx. 14°F(8°C) Current : less than 80% of

rated current

Temp. difference : less than 14°F(8°C) Current : over the reated

current

Temp. difference : over 14°F(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 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.

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

NOTICE

- 64 -

LGE Internal Use Only

Troubleshooting Guide

Electronic Parts (9k model)

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 115V, 60Hz)

• Main power's voltage

• Voltage applied to the unit

• Connecting method of Indoor/Outdoor connecting cable

• Check PWB Ass'y(Outdoor unit)

- Fuse

- Pattern damage

- Varistor(ZNR01J)

Check the connection housing for contacting

• Connector related to CN-POWER

• Connector related to CN-FAN

• Connector contacting of Outdoor Fan/Compressor

• Display PWB Ass'y Check

• Connector related to CN-DC/DC

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

PCB Board Operation Check

Items

• Power Transformer (Outdoor unit)

- Input Voltage

- Output Voltage



• IC01D(7812) Output (Indoor/Outdoor unit)



• IC02D(7805) Output

(Indoor unit)

IC03D(7805) Output

(Outdoor unit)



• IC01A(KIA7036, Reset IC) OSC01B(4MHz) (Indoor/Outdoor unit)

• Replace SMPS Module

• Replace IC01D

• Replace IC02D(Indoor unit) IC03D(Outdoor unit)

• Replace faulty parts

- About AC115V±10% - Check the power voltage

- About DC15V±3

• DC +12V

• DC +5V

• Voltage of Outdoor unit Micom No. 18, Voltage of Indoor unit Micom No. 43 and soldering condition

Content Remedy

NO

YES

(After 20 seconds)

- 65 -

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 controller

Cause by the remote controller

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

Check the contact of CN-DISP 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 DISP PWB Ass'y

- Voltage between CN DISP ① - ⑩ : DC +5V

When the detect switch(double key) inside the remote controller door is fault, it is impossible to operate temperature regulating(▲ /▼ ) and wind speed selecting.

Check the connecting circuit between the remote controller

MICOM (No. ㉚) - R17(2Ω) - IR LED - Q1 - R16(2.2KΩ).

Check point

• Check the connecting circuit between PIN ㊸ -

R11L(1K) - C11L(680PF) - MICOM PIN

• Check Receiver Ass'y

- 66 -

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 2°F at least.

When in Fan 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 R02H(12.1K), R04H(6.2K), Micom (No.27) (Indoor unit).

• Check the indoor temperature sensor is disconnected or not(About 10kΩ / at 77°F).

When the temperature around Outdoor PWB Ass'y is above 163°F the compressor is stop and only Outdoor Fan is operating.

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 Relay(RY - COMP) for driving compressor.

• When the power(About AC200V) is applied to the connecting wire

terminal support transferred to compressor, PWB Ass'y is normal.

• Check the circuit related to the relay(Outdoor unit).

Check point COMP ON COMP OFF

Between Micom(No.

DC5V DC0V

5, 6) and GND

Between IC01M, IC02M(No. 9)

Below DC 1V

About DC12V

and

IC01M, IC02M(No. 8)

(app)

- 67 -

LGE Internal Use Only

Troubleshooting Guide

When indoor Fan does not operate.

Check connecting condition of the CN-MOTOR CONNECTOR

Does the voltage of terminal of CN-DC/DC CONNECTOR in Indoor unit corresponds to the values in the table of page 72

Do the voltage of terminal of CN-DC/DC CONNECTOR in Outdoor unit corresponds to the values in the table of page 72

Check the patterns and the conditions of outdoor unit PWB Assy's.

Check the connecting condition and disconnection of connecting wires between Indoor and Outdoor unit.

Check the pattern and the condition of Indoor unit PWB Ass'y.

Check the interference of Indoor Fan.

Does the voltage of each terminals of CN-MOTOR CONNECTOR in Indoor unit corresponds to values in the Table of page 72

Check the motor of Indoor Fan

※

Indoor Fan may be stopped in the Soft Dry Mode(change to the Cooling Operation Mode).

※

Indoor Fan is to be stopped when Indoor pipe(coil) termperature is lower than 79°F. (At that times, Defrost indicator is turned on)

NO

YES

- 68 -

LGE Internal Use Only

Troubleshooting Guide

When Vertical Louver does not operate.

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

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

• Check the connecting condition of CN-UP/DOWN Connector

• Check the soldering condition(on PWB) of CN-UP/DOWN Connector

Check the operating circuit of the Vertical Louver

• Confirm that there is DC +12V between pin⑤(RED) of CN-UP/DOWN and GND.

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

- Between

77 , 78 , 79 and 80 of MICOM

- Between 4 , 5 , 6 and 7 of IC02M

- Between 10 , 11 , 12 and 13 of IC01M

- Between 1 , 2 , 3 , 4 and 5 of CN-UP/DOWN

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

- 69 -

LGE Internal Use Only

Troubleshooting Guide

• The operation indicator of Indoor unit blinks five times.

• The red indicator of Outdoor unit blinks five times.

Check the connecting wires between Indoor and Outdoor unit for the connecting error and the contacting condition.

Check the installation condition of outdoor unit.

Check for the communication error and the operating condition of product after also operating with the remote controller, then taking above 2 minutes.

Apply the power again after about 20 seconds by the power of Outdoor unit is off.

Check for the communication error and the operating condition of product after also operating with the remote controller, then taking above 2 minutes.

Check the PWB assembly of Indoor and Outdoor unit.

Caution: If the connecting wires of Indoor and Outdoor unit are not connected within 2 minutes after the power

of Outdoor unit is applied, a communication error will occur. Therefore, the power should be applied after connecting them.

When a comunication error occurs.

- 70 -

LGE Internal Use Only

Troubleshooting Guide

The phenomena in case of connecting error

INDOOR UNIT

Connector Type

Condition

Open and connecting error

Open

Short between terminals

(③ and ④) of ROOM-TH.

Short between terminals

(① and ②) of PIPE-TH.

Short between terminals

• The same as the phenomenon of Outdoor Unit.

• The up/down vane does not operate.

• The up/down vane does not smoothly operate.

• It does not operate with a remote controller.

• The operation indicator blinks once (on for 0.5 second, off for 3 seconds).

• The compressor operates continuously regardless of the setting temperature and the variation of room temperature.

• The operation indicator blinks once (on for 0.5 second, off for 3 seconds)

• Continuous operation

• The operation indicator blinks once.

• The compressor and the outdoor fan stop.

• The indoor fan speed is low.

• The indoor fan does not operate.

• The operation indicator of Indoor unit blinks 8 times.

CN-DC/DC

CN-MOTOR

CN-UP/DOWN

CN-DISP

CN-TH

① Blue ② Black ③ Brown ④ Red

Phenomena

①②③④⑤

On for 0.5 second

Off for 3 seconds

- 71 -

LGE Internal Use Only

Troubleshooting Guide

OUTDOOR UNIT

Connector Type

Condition

OPEN

• PWB pattern is damaged when applying the power.

Connecting reversely

OPEN

Connecting error

(① ↔ ②)

Connecting error

(① ↔ ③)

Connecting error

(① ↔ ④)

Connecting error

(② ↔ ③)

Connecting error

(② ↔ ④)

Connecting error

(③ ↔ ④)

• All functions stop.

• The operation with the remote controller, forced and test one do not operate.

• All functions stop.

• The operation with the remote controller, forced and test one do not operate.

• The Indoor Fan does not operate.

• The signal of remote controller is inputted, but the product does not operate.

• The RED indicator of outdoor unit and the operation indicator of indoor one blinks 5 times after 2 minutes with applying the power.

• No power for Indoor unit.

• The signal input of the remote controller and operation of product is impossible.

• The thermal protector of the Power Trans operates when let it alone for long time.

• The signal of the remote controller is inputted.

• The fuse and Q61 in the Outdoor unit are damaged when the indoor fan is operated.

• No power for Indoor unit.

• The signal input of the remote controller and operation of product is impossible.

• The RED indicator of the Outdoor unit blinks 5 times after 2 minutes with applying the power.

• All functions stop.

• The operation with the remote controller, forced and test one do not operate.

• The only signal of remote controller operation/stop is inputted, but the product does not operate.

• The RED indicator of outdoor unit blinks 5 times after 2 minutes with applying the power.

• The beep sound, such as "beep, beep, beep, beep, beep", occurs periodically in Indoor unit.

• The signal input of a remote controller and operation of product is impossible.

• The RED indicator blinks 5 times after 2 minutes with applying the power.

• All functions stop or the compressor does not operate.

• The operation with the remote controller, forced and test

one do not operate.

• All functions stop.

• The operation with the remote controller, forced and test

one do not operate.

CN-POWER

RY-COMP

terminal

CN-TRANS

CN-FAN

The connecting

wire of CN-

DC/DC, and

Indoor and

Outdoor Unit

④③②①

① Blue ② Black ③ Brown ④ Red

Phenomena

- 72 -

LGE Internal Use Only

Voltage of Connectors according to Indoor Fan Speed

1 2 3 4

1

3

4

1 2 3 4 5

INDOOR

FAN

MOTOR

INDOOR PWB ASSY

Connecting wires

between Indoor

and Outdoor

Indoor

Connecting Terminal

Outdoor

Connecting Terminal

Input Power

TAB-N

CN-MOTOR

CN-DC/DC

RY-COMP-A

3

4

RY-COMP-B

BL BK BR RD

4

3

2

1

CN-DC/DC

BL BK BR

RD

+

-

S-Hi Hi Med Low Off

12k

OUTDOO

R CN-

DC/DC

INDOOR

CN-

DC/DC

INDOOR

CN-

MOTOR

No. of pins

DC Voltage(±10%)

4

2

4

3

4

3

2

35.5

11.97

35.5

15.87

35.5

15.87

32.96

11.97

32.96

15.87

32.96

15.87

25.17

11.97

25.17

15.87

25.17

15.87

17.28

11.97

17.28

15.87

17.28

15.87

0

11.97

0

15.87

0

15.87

Troubleshooting Guide

- 73 -

LGE Internal Use Only

Exploded View

352150

35211B

354210

135515

131410

146811A

135316

268711A

152302

268711B

135500B

145200

146811B

135500A

266090

268711C

W6640

249951

159830

330871

267110

349600

346810

359012

352380

147581

146811A

135080

567480C

INLET AIR

+

EVA MIDDLE

Indoor Unit

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

Please check the correct parts in View RPL(Replacement Part List)on GCSC. (GCSC Website http://biz.Lgservice.com)

- 74 -

LGE Internal Use Only

Exploded View

2. Outdoor Unit (C/O Series)

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

Please check the correct parts in View RPL(Replacement Part List)on GCSC. (GCSC Website http://biz.Lgservice.com)

437212

554031

559010

437211

546810

447910

549610

649950

W0CZZ

W6640A

135500A

268711

W6640B

W6920

SUCTION

263230B

263230A

552201

554160

550140

552113

W6631

552203B

435511

135500B

552112

349480

435301

237202

430410

152503

W49810

552203A

- 75 -

LGE Internal Use Only

2. Outdoor Unit (H/P Series)

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

Please check the correct parts in View RPL(Replacement Part List)on GCSC. (GCSC Website http://biz.Lgservice.com)

Exploded View

437212

554031

559010

546810

447910

549610

135500A

W0CZZ

649950

W6640A

268711

W6640B

W6920

263230A

566000

SUCTION

263230B

554160

552201

552113

435511

135500B

552116

552202

561410 Applied to

Heating Models

437211

553000

430410

349480

435301

152503

237202

W6631

550140

W49810

552203A

552112

552203B

P/NO : 3828A20926C

FEBRUARY, 2010

Service call Number # : (888) LG Canada, (888) 542-2623

1. Please call the installing contractor of your product, as warranty service will be provided by them.

2. If you have service issues that have not been addressed by the contractor, please call 1-888-865-3026.

US

CANADA