Lg B-mmh09fa-1, B-mmc12fa-1, B-mmc09fa-1, A-mmh36fa-1, A-mmc36fa-1 Service Manual

HEAT CONTROLLER, INC.

Wall Mounted

Multi-Split System

Air Conditioning/Heat Pump

Indoor Unit: B-MMC09FA-1

B-MMH09FA-1 B-MMC12FA-1 B-MMH12FA-1

Outdoor Unit : A-MMH18FA-1

A-MMC24FA-1 A-MMH24FA-1 A-MMC36FA-1 A-MMH36FA-1

Before servicing the unit, read the

“safety precautions” in this manual.

Only for authorized service personnel.

Multi type Air Conditioner Service Manual

TABLE OF CONTENTS

Combination table.......................................................................................................................................3

Safety Precautions......................................................................................................................................4

Installation guide at the seaside..............................................................................................................10

Dimensions................................................................................................................................................11

Indoor Unit..............................................................................................................................................11

Outdoor Unit...........................................................................................................................................12

Product Specifications .............................................................................................................................15

Indoor Unit..............................................................................................................................................15

Outdoor Unit...........................................................................................................................................16

Installation .................................................................................................................................................19

Installation Parts.....................................................................................................................................19

Installation Tools.....................................................................................................................................19

Select the best location .........................................................................................................................20

Piping length and elevation ....................................................................................................................21

Fixing Installation Plate(Standard Type).................................................................................................22

Drill a hole in the wall ...........................................................................................................................22

Flaring Work and Connection of Piping..................................................................................................23

Flaring work............................................................................................................................................24

Connecting the Piping ............................................................................................................................24

Connecting the Cable between Indoor Unit and Outdoor Unit .............................................................31

Connect the cable to the Indoor unit. .....................................................................................................31

Connect the cable to the Outdoor unit....................................................................................................32

Connection method of the connecting cable(Example)..........................................................................33

Connect the cable to the indoor unit.......................................................................................................34

Checking the Drainage, Forming the Pipings and Long Pipe Setting .................................................35

Checking the drainage............................................................................................................................35

Forming the piping..................................................................................................................................36

Air Purging and Evacuation.....................................................................................................................37

Checking method ...................................................................................................................................37

Evacuation..............................................................................................................................................38

Charging ....................................................................................................................................................39

Test Running .............................................................................................................................................40

Operation ...................................................................................................................................................41

Function of control..................................................................................................................................41

Function of Indoor Unit...........................................................................................................................46

Function of Outdoor Unit ........................................................................................................................47

Remote Control Operation .....................................................................................................................48

Disassembly ..............................................................................................................................................49

Indoor Unit..............................................................................................................................................49

Schematic Diagram...................................................................................................................................52

Electronic Control Device .......................................................................................................................52

Wiring Diagram.......................................................................................................................................55

Components Locations...........................................................................................................................57

Troubleshooting Guide .............................................................................................................................61

Refrigeration Cycle Diagram ..................................................................................................................61

Self-diagnosis Function..........................................................................................................................64

Cycle Troubleshooting Guide..................................................................................................................65

Electronic Parts Troubleshooting Guide .................................................................................................66

Error Code..............................................................................................................................................71

2-way, 3-way Valve ....................................................................................................................................75

Exploded View ..........................................................................................................................................79

Indoor Unit .............................................................................................................................................79

Outdoor Unit...........................................................................................................................................81

- 2 -

LGE Internal Use Only

NOTICE

Combination table

18 kBtu( 2 rooms)

1 UNIT 9 - 9 2 UNIT 9 9 18

24 kBtu( 2 rooms)

1 UNIT

2 UNIT 9 12 21

Combination table

Combination

Unit-A Unit-B Total

Combination

Unit-A Unit-B Total

9-9

12 - 12

9918

12 12 24

36 kBtu (3 rooms)

Combination

Unit-A Unit-B Unit-C Total

1 UNIT

2 UNIT 9 12 - 21

3 UNIT

Notes :

1.Cooling Capacity is based on : indoor temp. 26.7°C(80.1°F)DB, 19.4°C(66.9°F)WB; outdoor temp. 35°C(95°F)DB, 23.9°C(75°F)WB

2.Heating Capacity is based on : indoor temp. 21.1°C(70°F)DB, 15.6°C(60.1°F)WB; outdoor temp. 8.3°C(46.9°F)DB, 6.1°C(43°F)WB

9-- 9

12 - - 12

99-18

12 12 - 24

99927 9 9 12 30 9121233

12 12 12 36

Symbols Used in this Manual

This symbol alerts you to the risk of electric shock.

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

This symbol indicates special notes.

- 3 -

LGE Internal Use Only

Safety Precautions

WARNING

CAUTION

WARNING

Safety Precautions

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

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

This symbol indicates the possibility of death or serious injury.

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

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

Be sure not to do.

Be sure to follow the instruction.

■ Installation

Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated circuit.

• There is risk of fire or electric shock.

Install the panel and the cover of control box securely.

• There is risk of fire or electric shock.

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

• Do not disassemble or repair the product. There is risk of fire or electric shock.

.

Always install a dedicated circuit and breaker.

• Improper wiring or installation may cause fire or electric shock

Always ground the product.

• There is risk of fire or electric shock.

Use the correctly rated breaker or fuse.

• There is risk of fire or electric shock.

- 4 -

LGE Internal Use Only

Safety Precautions

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

• 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 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.

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.

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

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

Do not allow water to run into electric parts.

Do not store or use flammable gas or combustibles near the product.

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

• There is risk of fire or failure of product.

- 5 -

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

• Oxygen deficiency could occur.

Gasolin

LGE Internal Use Only

Safety Precautions

When flammable gas leaks, turn off the gas and open a window for ventilation before

If strange sounds, or smoke comes from product. Turn the breaker off.

turn the product on.

• Do not use the telephone or turn switches on or off. There is risk of explosion or fire

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.

• There is risk of electric shock or fire.

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

• There is risk of fire or electric shock.

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

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

Be cautious that water could not enter the product.

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

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

• There is risk of fire or electric shock.

Turn the main power off when cleaning or maintaining the product.

• There is risk of electric shock.

- 6 -

LGE Internal Use Only

Safety Precautions

CAUTION

When the product is not to be used for a long time, disconnect the power by turning off the breaker.

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

■ Installation

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

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

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

• This could result in personal injury and product damage.

Keep level even when installing the product.

• Low refrigerant levels may cause failure of product.

Do not install the product where the noise or hot air from the outdoor unit could oftend neighbors.

• It may cause a problem for your neighbors.

• A bad connection may cause water leakage.

Use two or more people to lift and transport the product.

• Avoid personal injury.

• To avoid vibration or water leakage.

90°

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.

- 7 -

LGE Internal Use Only

Safety Precautions

■ Operational

Do not expose the skin directly to cool air for long periods of time. (Don't sit in the draft.)

• This could harm to your health.

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 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 touch the metal parts of the product when removing the air filter. They are very sharp!

• There is risk of personal injury.

Do not block the inlet or outlet of air flow.

• It may cause product failure.

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

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

Thinner

Wax

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 product is operated.

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

- 8 -

Do not drink the water drained from the product.

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

LGE Internal Use Only

Safety Precautions

Use a firm stool or ladder when cleaning or maintaining the product.

• Be careful and avoid personal injury.

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

• They may burn or explode.

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

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.

If you eat the liquid from the batteries, brush your teeth and see doctor. Do not use the remote if the batteries have leaked.

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

- 9 -

LGE Internal Use Only

Installation guide at the seaside

Sea wind Sea wind

Installation guide at the seaside

1.

Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.

2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient performance.

3. If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea wind. Otherwise it needs additional anticorrosion treatment on the heat exchanger.

Selecting the location(Outdoor Unit)

1) If the outdoor unit is to be installed close to the seaside, direct exposure to the sea wind should be avoided. Install the outdoor unit on the opposite side of the sea wind direction.

2) In case, to install the outdoor unit on the seaside, set up a windbreak not to be exposed to the sea wind.

Windbreak

Sea wind

3) Select a well-drained place.

1.

If you can’t meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment.

2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water

• It should be strong enough like concrete to prevent the sea wind from the sea.

• The height and width should be more than 150% of the outdoor unit.

• It should be keep more than 70 cm of space between outdoor unit and the windbreak for easy air flow.

- 10 -

LGE Internal Use Only

Dimensions

Installation plate

D

H

W

Indoor Unit

Split Type Indoor

Dimensions

Model

Dimension

W mm(in) 840(33) 895(35.2)

Split Type

S4

9 kBtu/h

SE

12 kBtu/h

H mm(in) 270(10.6) 282(11.1)

D mm(in) 153(6) 165(6.5)

- 11 -

LGE Internal Use Only

W

D

L1

L2

L4

L3

H

L7L5L6

Dimensions

Outdoor Unit

MODEL

DIM

W mm(in) 870(34.3)

H mm(in) 655(25.8)

D mm(in) 320(12.6)

L1 mm(in) 370(14.6)

L2 mm(in) 25(1.0)

L3 mm(in) 775(30.5)

L4 mm(in) 25(1.0)

L5 mm(in) 546(21.5)

L6 mm(in) 160(6.3)

L7 mm(in) 160(6.3)

UE

18kBtu/h

- 12 -

LGE Internal Use Only

W

D

L1

L2

L4

L3

H

L7L5L6

MODEL

DIM

W mm(in) 870(34.3)

H mm(in) 808(31.8)

UE 1

24kBtu/h

D mm(in) 320(12.6)

L1 mm(in) 370(14.6)

L2 mm(in) 25(1.0)

L3 mm(in) 775(30.5)

L4 mm(in) 25(1.0)

L5 mm(in) 546(21.5)

L6 mm(in) 160(6.3)

L7 mm(in) 160(6.3)

- 13 -

LGE Internal Use Only

Dimensions

L6L7 L8

L9

L4

H

L5

W

D

L1

L3

L2

L10 L11 L11 L11L11L11

Gas side 3-way valve

Liquid side 2-way valve

MODEL

DIM

W mm(in) 870(34.3)

H mm(in) 1038(40.7)

D mm(in) 320(12.6) L1 mm(in) 360(14.2) L2 mm(in) 340(13.4) L3 mm(in) 25(1.0) L4 mm(in) 1035(40.8) L5 mm(in) 25(1.0) L6 mm(in) 546(21.5) L7 mm(in) 160(6.3) L8 mm(in) 160(6.3) L9 mm(in) 44(11.7)

L10 mm(in) 64.5(2.5) L11 mm(in) 50(2.0)

UE2

36kBtu/h

- 14 -

LGE Internal Use Only

Product Specifications

Indoor Unit

Product Specifications

Indoor Unit Type

Model

Nominal Cooling Capacity kcal/h(W)

Nominal Heating Capacity kcal/h(W)

Air Circulation H/M/L CMM(CFM) Setting temperature range(cool/heat) °C Fan motor Output W

Fan Type

Noise Level (Sound Press,1m) Temperature controller Coil Tube Size (OD) inch(mm)

Dehumidification Rate l/h Dimensions (W*H*D) inch(mm) Net Weight kg(lbs) Piping Connection Liquid inch(mm)

Packing Dimension (W*H*D) inch(mm) Stuffing Quantity With(Without) S/Parts 20/40ft(hi-c)

★

Btu/h

★

Btu/h

Model Input V Running Current A

No. Used / Diameter EA/inch(mm)

H/M/L dBA

Fins per inch No. of Rows & Column

Gas inch(mm) Drain hose (ID Ø) mm

Wall Mounted

B-MMC09FA-1 B-MMH09FA-1 B-MMC12FA-1 B-MMH12FA-1

2,267(2,637) 2,267(2,637) 3,023(3,516) 3,023(3,516)

9,000 9,000 12,000 12,000

- 2,267(2,637) - 3,023(3,516)

- 9,000 - 12,000

8.2(289) 8.2(289) 9.4(332) 9.4(332) 18~30 18~30 18~30 18~30

15 15 15 15

DL-88430LGIF DL-88430LGIF DL-88430LGIF DL-88430LGIF

DC36 DC36 DC36 DC36

0.15 0.15 0.15 0.15

Cross Flow Fan Cross Flow Fan Cross Flow Fan Cross Flow Fan

1/3.74(95) 1/3.74(95) 1/3.74(95) 1/3.74(95)

31 / 29 / 22 31 / 29 / 22 36 / 32 / 29 36 / 32 / 29

Thermistor Thermistor Thermistor Thermistor

0.197(5.0) 0.197(5.0) 0.197(5.0) 0.197(5.0) 20 20 18 18

2R,15C 2R,15C 2R,15C 2R,15C

- 1.1 - 1.2

33.0*10.6*6.0(840*270*153) 33.0*10.6*6.0(840*270*153) 35.2*11.1*6.5(895*282*165) 35.2*11.1*6.5(895*282*165) 7(15.4) 7(15.4) 9.5(20.9) 9.5(20.9)

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

20 20 20 20

35.7*13.1*8.8(906*332*223) 35.7*13.1*8.8(906*332*223) 38.3*9.1*14.6(973*231*372) 38.3*9.1*14.6(973*231*372)

440/910 (1091) 440/910 (1091) 353/719 (792) 353/719 (792)

Note : 1.★See the page "Combination Table"

2. Due to our policy of innovation some specifications may be changed without notification.

- 15 -

LGE Internal Use Only

Product Specifications

Outdoor Unit - Multiple piping models

Model

Cooling Capacity★ Btu/hr

Heating Capacity★ Btu/hr

Input★ Cooling W

Running Current★(208/230V)

Power Supply Ø,V,Hz Max. Number of Connectable Indoor Units Compressor Type (Constant) Model

Compressor Type (Constant) Model

Refrigerant charge Charge g(oz)

Coil Tube Size (OD) inch(mm)

Fan motor Model

Fan Type

Air Circulation Outdoor CMM(CFM) Noise Level(H/L) at 230V Defrosting SVC Valve Liquid inch(mm)

Dimensions W*H*D inch(mm) Net Weight Outdoor kg(lbs) Max. Interunit Piping Length

Max. Installation Indoor Unit~Outdoor Unit m Height Difference Indoor Unit~Indoor Unit m Packing Dimension W*H*D inch(mm) Testing Combinations Stuffing Quantity 20/40ft

Heating W Cooling A Heating A

Motor Type Quantity Ea Motor Input W Oil Charge cc Oil Type Capacitor µF/Vac O.L.P Type(model name)

Type Control

Fins per inch No. of Rows & Column/No.

Output W Capacitor µF/Vac

No. Used / Diameter EA/inch(mm) Discharge Side / Top

Sound Press,1m dB(A) 1

Gas

Total of Each Room m For One Room m

W

kcal/hr

W

kcal/hr

A-MMH18FA-1

9,000~18,000

2637~5275 2267~4536

9,000~18,000

2637~5275 2267~4536 1070~1980 1040~1960

4.9~8.8

4.6~8.6

1,208/230,60

2

Rotary GK094K Hermetic

1

955

330±10 FVC68D 30 / 370

External Type(MRA98996-12026)

Rotary GK113K Hermetic

1

1,120

330±10 FVC68D 35 / 370

External Type(MRA12124-12026)

1400(49)

R410A

EEV

0.276(7.0) 18

2R,28C

IC-1640LG GE

90

6/370

Propeller

1 / 460

Side

50(1765.7)

51

Invertion Cycle 1/4 (6.35) * 2EA 3/8 (9.52) * 2EA

34.3*25.8*12.6 (870*655*320) 57(125.7)

30 15

7.5

40.2*28.2*17.2 (1020*716*437) S4 9k + S4 9k

81/171

Note:

1. Capacities are based on the following conditions: Cooling: - Indoor Temperature 26.7˚C(80˚F) DB/19.4˚C(67˚F) WB

- Outdoor Temperature 35˚C(95˚F) DB/23.9˚C(75˚F) WB

Heating: - Indoor Temperature 21.1˚C(70˚F) DB/15.6˚C(60˚F) WB

- Outdoor Temperature 8.3˚C(47˚F) DB/6.1˚C(43˚F) WB

Piping Length - Interconnecting Piping Length 7.5m

- Level Difference of Zero

2. Wiring cable size must comply with the applicable local and national code.

3. Capacities are Net Capacities.

4. ★: See the page "Combination Table"

5. The specification may be subject to change without prior notice for purpose of improvement.

- 16 -

LGE Internal Use Only

Product Specifications

Model

Cooling Capacity★ Btu/hr

Heating Capacity★ Btu/hr

Input★ Cooling W

Running Current★(208/230V)

Power Supply Ø,V,Hz Max. Number of Connectable Indoor Units Compressor Type (Constant) Model

Compressor Type (Constant) Model

Refrigerant charge Charge g(oz)

Coil Tube Size (OD) inch(mm)

Fan motor Model

Fan Type

Air Circulation Outdoor CMM(CFM) Noise Level(H/L) at 230V Defrosting SVC Valve Liquid inch(mm)

Dimensions W*H*D inch(mm) Net Weight Outdoor kg(lbs) Max. Interunit Piping Length

Max. Installation Indoor Unit~Outdoor Unit m Height Difference Indoor Unit~Indoor Unit m Packing Dimension W*H*D inch(mm) Testing Combinations Stuffing Quantity 20/40ft

Heating W Cooling A Heating A

Motor Type Quantity Ea Motor Input W Oil Charge cc Oil Type Capacitor µF/Vac O.L.P Type(model name)

Type Control

Fins per inch No. of Rows & Column/No.

Output W Capacitor µF/Vac

No. Used / Diameter EA/inch(mm) Discharge Side / Top

Sound Press,1m dB(A) 1

Gas

Total of Each Room m For One Room m

W

kcal/hr

W

kcal/hr

A-MMC24FA-1 A-MMH24FA-1

9,000~24,000 9,000~24,000

2637~7033 2637~7033 2267~6037 2267~6037

- 9,000~24,000

- 2637~7033

- 2267~6037

1170~2390 1170~2390

- 1220~2440

7.7~10.1 7.7~10.1

- 7.4~9.8

1,208/230,60 1,208/230,60

22

Rotary Rotary GK094K GK094K Hermetic Hermetic

11

955 955

330±10 330±10

FVC68D FVC68D

30 / 370 30 / 370

External Type(MRA98996-12026) External Type(MRA98996-12026)

Rotary Rotary GK141K GK141K Hermetic Hermetic

11

1430 1,430

350±10 350±10

FVE FVE

35 / 370 35 / 370

External Type(MRA12105-12026) External Type(MRA12105-12026)

1600 1600

R410A R410A

EEV EEV

0.276(7.0) 0.276(7.0) 18 18

2R,36C 2R,36C

IC-1640LG GE IC-1640LG GE

90 90

6/370 6/370

Propeller Propeller

1 / 460 1 / 460

Side Side

53(1872) 53(1872)

54 54

- Invertion Cycle 1/4 (6.35) * 2EA 1/4 (6.35) * 2EA 3/8 (9.52) * 2EA 3/8 (9.52) * 2EA

34.3*31.8*12.6 (870*808*320) 34.3*31.8*12.6 (870*808*320) 64(141.1) 64(141.1)

30 30 15 15

7.5 7.5

40.2*34.3*17.2 (1022*870*437) 40.2*34.3*17.2 (1022*870*437) SE 12K +SE 12K SE 12K +SE 12K

54/114 54/114

Note:

1. Capacities are based on the following conditions: Cooling: - Indoor Temperature 26.7˚C(80˚F) DB/19.4˚C(67˚F) WB

- Outdoor Temperature 35˚C(95˚F) DB/23.9˚C(75˚F) WB

Heating: - Indoor Temperature 21.1˚C(70˚F) DB/15.6˚C(60˚F) WB

- Outdoor Temperature 8.3˚C(47˚F) DB/6.1˚C(43˚F) WB

Piping Length - Interconnecting Piping Length 7.5m

- Level Difference of Zero

2. Wiring cable size must comply with the applicable local and national code.

3. Capacities are Net Capacities.

4. ★: See the page "Combination Table"

5. The specification may be subject to change without prior notice for purpose of improvement.

- 17 -

LGE Internal Use Only

Product Specifications

Model

Cooling Capacity★ Btu/hr

Heating Capacity★ Btu/hr

Input★ Cooling W

Running Current★(208/230V)

Power Supply Ø,V,Hz Max. Number of Connectable Indoor Units Compressor Type (Constant) Model

Compressor Type (Constant) Model

Refrigerant charge Charge g(oz)

Coil Tube Size (OD) inch(mm)

Fan motor Model

Fan Type

Air Circulation Outdoor CMM(CFM) Noise Level(H/L) at 230V SVC Valve Liquid inch(mm)

Dimensions W*H*D inch(mm) Net Weight Outdoor kg(lbs) Max. Interunit Piping Length

Max. Installation Indoor Unit~Outdoor Unit m Height Difference Indoor Unit~Indoor Unit m Packing Dimension W*H*D inch(mm) Stuffing Quantity 20/40ft

Heating W Cooling A Heating A

Motor Type Quantity Ea Motor Input W Oil Charge cc Oil Type Capacitor µF/Vac O.L.P Type(model name)

Type Control

Fins per inch No. of Rows & Column/No.

Output W Capacitor µF/Vac

No. Used / Diameter EA/inch(mm) Discharge Side / Top

Sound Press,1m dB(A) 1

Gas

Total of Each Room m For One Room m

W

kcal/hr

W

kcal/hr

A-MMC36FA-1 A-MMH36FA-1

9,000~36,000 9,000~36,000

2637~10,550 2637~10,550

2267~9071 2267~9071

- 9,000~36,000

- 2637~10,550

- 2267~9071

1320~3680 1320~3680

- 1410~3340

5.9~16.6 5.9~16.6

- 6.3~15.0

1,208/230,60 1,208/230,60

33

Rotary Rotary

GK141K GK141K

2 Pole Induction(PSC) 2 Pole Induction(PSC)

11

1430 1430 350Å}10 350Å}10 FVC68D FVC68D 35 / 370 35 / 370

External Type External Type

Rotary Rotary

GJ230K GJ230K

2 Pole Induction(PSC) 2 Pole Induction(PSC)

11

2370 2370

700±10 7000±10 FVC68D FVC68D 50 / 400 50 / 400

Internal Type Internal Type

2400 2400

R410A R410A

EEV EEV

0.276(7.0) 0.276(7.0) 18 18

2R,48C 2R,48C

ARC286B01 * 2 ARC286B01 * 2

102 102

2/370 2/370

Propeller Propeller

2 / 15.7(400) 2 / 15.7(400)

Side Side

63(2225) 63(2225)

51 51

1/4 (6..35) * 3EA 1/4 (6..35) * 3EA 3/8 (9.52) * 3EA 3/8 (9.52) * 3EA

34.3*40.7*12.6 (870*1038*320) 34.3*40.7*12.6 (870*1038*320) 84(185.2) 84(185.2)

45 45 15 15

7.5 7.5

41.3*44.9*17.3 (1048*1140*439) 41.3*44.9*17.3 (1048*1140*439) 53/111 53/111

Note:

1. Capacities are based on the following conditions: Cooling: - Indoor Temperature 26.7˚C(80˚F) DB/19.4˚C(67˚F) WB

- Outdoor Temperature 35˚C(95˚F) DB/23.9˚C(75˚F) WB

Heating: - Indoor Temperature 21.1˚C(70˚F) DB/15.6˚C(60˚F) WB

- Outdoor Temperature 8.3˚C(47˚F) DB/6.1˚C(43˚F) WB

Piping Length - Interconnecting Piping Length 7.5m

- Level Difference of Zero

2. Wiring cable size must comply with the applicable local and national code.

3. Capacities are Net Capacities.

4. ★: See the page "Combination Table"

5. The specification may be subject to change without prior notice for purpose of improvement.

- 18 -

LGE Internal Use Only

Installation

Type "A" screw and plastic anchor

Type "B" screw

Remote Control Holder

Installation plate

Figure FigureName

Screw driver

Electric Drill

Measuring Tape, Knife

Hole Core Drill

Spanner

Torque wrench

Ohmmeter

Hexagonal wrench

Ammeter

Gas Leak Detector

Thermometer,

Level

Flaring Tool Set

Name

Read carefully, and then follow step by step.

Installation Parts

Installation

Installation Tools

- 19 -

LGE Internal Use Only

Installation

More than 20 cm

(7.9 inch)

More than 10 cm

(3.9 inch)

More than 10 cm

(3.9 inch)

More than 2.4m

(8 ft)

Select the best location

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 the spaces indicated by arrows from the wall, ceiling, fence or other obstacles.

6. Use a Metal Detector or Metal Scanner to locate studs to prevent unnecessary damage to the wall.

CAUTION: Install the indoor unit on the wall where the height from the floors more than 2.4 m (8 ft).

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 spaces indicated by arrows around front, back and side of the unit.

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

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

Select a place so that the warm air and sound from

5. the air conditioner do not disturb neighbors.

Rooftop Installations:

If the outdoor unit is installed on a roof structure, be sure to level the unit. Ensure the roof structure and anchoring method are adequate for the unit location. Consult local codes regarding rooftop mounting.

18 / 24 kBtu

more than 30 cm

(11.8 inch)

more than 70 cm

(27.6 inch)

36 kBtu

more than 30 cm

(11.8 inch)

more than 30 cm

(11.8 inch)

more than 60 cm

(23.6 inch)

more than 30 cm

(11.8 inch)

- 20 -

more than 70 cm

(27.6 inch)

more than 60 cm

(23.6 inch)

LGE Internal Use Only

Piping length and elevation

h2

h1

A

B

C

h2

h1

A

B

h1

Multi Piping Type

Installation

Capacity

Max total length

of all pipes

(A+B/A+B+C)

Max length of

each pipe

(A/B/C)

Min length of

each pipe

(A/B/C)

Max Elevation between each

indoor unit and

outdoor unit (h1)

Max elevation

between indoor

units (h2)

18 kBtu 30 m (100 ft) 15 m (50 ft) 3 m (10 ft) 7.5 m (25 ft) 7.5 m (25 ft) 24 kBtu 30 m (100 ft) 15 m (50 ft) 3 m (10 ft) 7.5 m (25 ft) 7.5 m (25 ft) 36 kBtu 45 m (150 ft) 15 m (50 ft) 3 m (10 ft) 7.5 m (25 ft) 7.5 m (25 ft)

Pipe Size

Indoor Capacity

Gas Liquid Standard Length

Additional

Refrigerant

9 kBtu 9.52 mm (3/8") 6.35 mm (1/4") 7.5 m (25 ft) 20 g/m (0.22 oz/ft)

12 kBtu 9.52 mm (3/8") 6.35 mm (1/4") 7.5 m (25 ft) 20 g/m (0.22 oz/ft)

18 / 24 kBtu

36 kBtu

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

basis of reliability.

- 21 -

LGE Internal Use Only

Installation

Installation Plate

Type "A" screw

Chassis

Hook

5-7 mm

(0.2"~0.3")

Indoor

WALL

Outdoor

Fixing Installation Plate(Standard Type)

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

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

• Mount the installation plate horizontally by aligning the

centerline using a level.

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

CHASSIS

(Grade)

S4 50 105 59 105 SE 65 110 85 110

ABCD

Distance (mm)

D

C

Ø70mm

Left rear piping Right rear piping

Installation plate

B

A

Ø70mm

Drill a hole in the wall

• Drill the piping hole with a Ø 70 mm (Ø 2.75 inch) hole core drill. Drill the piping hole at either the right or the left

with the hole slightly slanted to the outdoor side.

- 22 -

LGE Internal Use Only

Flaring Work and Connection of Piping

Copper

pipe

90°

Slanted Uneven Rough

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

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.

Cut the pipes

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

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

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

4. Cut the cable 1.5m (5.0ft) longer than the pipe length.

Burrs removal

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.

Pipe

Reamer

Putting nut on

• Remove flare nuts attached to indoor and outdoor unit, then

put them on pipe/tube having completed burr removal. (not possible to put them on after flaring work)

Flaring work

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

• Firmly hold copper pipe in a Bar in the dimension shown in the

table Below.

Outside diameter A

mm inch mm Ø6.35 1/4 0~0.5 Ø9.52 3/8 0~0.5

Point down

Flare nut

Copper tube

- 23 -

LGE Internal Use Only

Flaring Work and Connection of Piping

Inclined

Inside is shiny without scratches

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

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.

Connecting the Piping

Indoor

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

2. Remove the plastic tubing retainer(see the illustration by) and pull the tubing and drain hose away from chassis.

3. Replace only the plastic tubing holder 1, not the holder 2 in the original position.

For right rear piping

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

2.

Insert the connecting cable into the indoor unit from the outdoor unit through the piping hole.

• Do not connect the cable to the indoor unit.

•

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

3. 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.

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.

Drain hose

Tape

Connecting pipe

Drain hose

Connecting cable

- 24 -

LGE Internal Use Only

4. Indoor unit installation

Drain hose

Connecting

cable

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

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

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

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

2. Tighten the flare nut with a wrench.

Flaring Work and Connection of Piping

Indoor unit tubing Flare nut Pipes

Outside diameter Torque

mm inch kg.m lbf.in Ø6.35 1/4 1.8 156.2 Ø9.52 3/8 4.2 364.5

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 for enough to cover where they fit into the rear piping housing section.

Wrench

Indoor unit tubing

Drain pipe

Connection pipe

Vinyl tape (wide)

Connecting cable

Open-end wrench (fixed)

Flare nut

Indoor unit drain hose

Vinyl tape(narrow)

Adhesive

Plastic bands

Insulation material

Wrap with vinyl tape

Vinyl tape(narrow)

Connection pipe

Indoor unit pipe

Pipe

- 25 -

Wrap with vinyl tape

Pipe

Vinyl tape(wide)

Drain hose

LGE Internal Use Only

Flaring Work and Connection of Piping

For left rear piping

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

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

3.

Insert the connecting cable into the indoor unit.

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

• Make a small loop with the cable for easy connection

later.

4. Tape the drain hose and the connecting cables.

5. Indoor unit installation

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

installation plate.

• Insert the spacer etc. between the indoor unit and the

installation plate and separate the bottom of the indoor unit from the wall.

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

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

Connecting

cable

Drain pipe

Indoor unit

Spacer

Installation plate

8cm

2. Tighten the flare nut with a wrench.

Outside diameter Torque

mm inch kg.m lbf.in Ø6.35 1/4 1.8 156.2 Ø9.52 3/8 4.2 364.5

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

- 26 -

Indoor unit tubing Flare nut Pipes

Open-end wrench (fixed)

Flare nut

Wrench

Indoor unit tubing

Drain hose

Indoor unit drain hose

Adhesive

Vinyl tape

LGE Internal Use Only

Connection pipe

(narrow)

Wrap the insulation material around the connecting por-

Plastic bands

Insulation material

tion.

1. Overlap the connection pipe heat insulation and the indoor unit pipe heat 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 cloth tape over the range within which they fit into the rear piping housing section.

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

Flaring Work and Connection of Piping

Connection pipe

Vinyl tape (wide)

Connecting cable

Drain hose

Wrap with vinyl tape

Pipe

Vinyl tape(narrow)

Pipe

Vinyl tape(narrow)

Wrap with vinyl tape(wide)

Indoor unit piping

Indoor unit installation

1. Remove the spacer.

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

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

- 27 -

Piping for passage through piping hole

Connecting

cable

Drain hose

LGE Internal Use Only

Flaring Work and Connection of Piping

Installation Information. For left 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 right to left may cause damage to the tubing.

- 28 -

LGE Internal Use Only

REMOTE CONTROL PREPARATION(OPTIONAL)

HOW TO MOUNT ONTO A WALL

HOW TO INSERT BATTERIES

Remove the battery cover from the remote controller.

• Slide the cover according to the arrow direction.

Insert the two batteries.

• Be sure that the (+) and (-) directions are correct.

• Be sure that both batteries are new.

Re-attach the cover.

• Slide it back into position.

Flaring Work and Connection of Piping

• Do not use rechargeable batteries, such batteries differ from standard dry cells in shape, dimensions, and performance.

• Romove the batteries from the remote controller if the air conditioner is not going to be used for some long time.

- 29 -

LGE Internal Use Only

Flaring Work and Connection of Piping

Liquid side piping

Torque wrench

B-UNIT

A-UNIT

Gas side piping

Outdoor unit

Outdoor

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

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

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

Ø6.35 1/4 1.8 156.2 Ø9.52 3/8 4.2 364.5

Outside diameter Torque

mm inch kg.m lbf.in

- 30 -

LGE Internal Use Only

Air

Conditioner

Main power source

Circuit Breaker Use a circuit breaker or time delay fuse.

Connecting the Cable between Indoor Unit and Outdoor Unit

GN/YL

20 mm

(0.79 inch)

Line voltage (208~230V)

18 / 24 kBtu 36 kBtu

GN/YL

20 mm

(0.79 inch)

Line voltage (208~230V)

AWG14

AWG12 (Allowable temperature to the wire rated at least 90C˚)

Connecting the Cable between Indoor Unit and Outdoor Unit

Connect the cable to the Indoor unit.

Connect the cable to the indoor unit by connecting the wires to the terminals on the control board individually according to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and the terminal No. are

the same as those of the indoor unit.)

The earth wire should be longer than the common wires. The circuit diagram is not subject to change without notice. When installing, refer to the electrical diagram behind the front panel of Indoor Unit. The wiring for the outdoor unit can be found on the inside of the Outdoor Unit control cover.

WARNING:

• The circuit diagram is not subject to change without notice.

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

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

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

WARNING: Provide a circuit breaker between power source and the outdoor unit as shown below.

WARNING:

The power cord connected to the outdoor unit should be complied with the following speci-

fications (ETL recognized and CSA certified).

The power connecting cable connected to the indoor and outdoor unit should be complied with the following specifications

WARNING:

trol box panel by using tie wrap as the fixture.

(ETL recognized and CSA certified).

AWG18

Low voltage (below 40V)

When using the separate wire as the power cord, please fix the separate wire into the con-

GN/YL

20mm

- 31 -

LGE Internal Use Only

Connecting the Cable between Indoor Unit and Outdoor Unit

NOTICE

Outdoor unit

Over 5mm

Holder for

power supply

cord

Connecting

cable

Cover control

Terminal block

Power supply

cable

Connect the cable to the Outdoor unit.

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

screw. Connect the wires to the terminals on the control board individually as the following.

2. Secure the cable onto the control board with the holder

(clamper).

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

screw.

18 kBtu

Power Source

208/230V AC

(High voltage)

Teminal on the Outdoor Unit

Power Source

208/230V AC

(High voltage)

Teminal on the Outdoor Unit

Power Source

208/230V AC

(High voltage)

Teminal on the Indoor Unit

A-UNIT

43

432121

Teminal on the Outdoor Unit Teminal on the Outdoor Unit

A Indoor B Indoor

Teminal on the Indoor Unit

Connecting cable(Low voltage)

4321L1 L2

24 kBtu

Teminal on the Indoor Unit

A-UNIT

L2L1

Teminal on the Outdoor Unit

432121

Teminal on the Indoor Unit

43

Teminal on the Outdoor Unit

B IndoorA Indoor

36 kBtu

Teminal on the Indoor Unit

A-UNIT

L2L1

Teminal on the Outdoor Unit

432121

Teminal on the Indoor Unit

43

Teminal on the Outdoor Unit

B IndoorA Indoor

B-UNIT

4321

Connecting cable(Low voltage)

4321

Teminal on the Indoor Unit

4321

C-UNIT

Teminal on the Outdoor Unit

C Indoor

4321

Connecting cable(Low voltage)

4321

:

1. Separately wire the high and low voltage line.

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

3. Use outdoor and waterproof connection cable rated more than 300V for the connection between indoor and outdoor unit.

(For example, Type SJOW)

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.

- 32 -

LGE Internal Use Only

High voltage

Low voltage

Strip 10mm(3/8")

Round terminal

Connecting cable

Loosening the terminal block screw

Fastening the wire tightly

Strand wire

G

Terminal block

Lock nut

Power supply line

(1ø, 230/208V)

Conduit panel

Cap(Reuse)

Cord clamp

Hole (for low voltage line)

Cap(Remove) Taping

(for sealing)

Low voltage line (connecting cable)

Connecting the Cable between Indoor Unit and Outdoor Unit

Connection method of the connecting cable(Example)

(1) Remove two-caps on the conduit panel.

(for low voltage line) (2) Pull out connection cable through conduit. (3) After conduit to the panel, fix nut to the opposite

side of panel. (4) Pass the connection cabel through the hole. (5) Properly connect the cable on the terminal block. (6) Fix the connection cable with cord clamp provided

on the unit not to have strain at the terminal when

the connection cable is pulled outside up to a 35

pound weight

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 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.

WARNING: Loose wiring may cause the termi-

nal to overheat or result in unit malfunction. A fire hazard may also exist. Therefore, be sure

all wiring is tightly connected.

- 33 -

LGE Internal Use Only

Connecting the Cable between Indoor Unit and Outdoor Unit

Air

Conditioner

Circuit Breaker

Use a circuit breaker or time delay fuse.

Main power source

Model Power source

Fuse or breaker

Capacity

1Ø, 230 / 208V

20 A

1Ø, 230 / 208V

25 A

1Ø, 230 / 208V

40 A

18 kBtu 24 kBtu 36 kBtu

Connecting cable

CAUTION: Provide a circuit breaker between power source and the unit as shown below.

Connect the cable to the indoor unit

1. Connect the wires to the terminals on the control board individually according to the outdoor unit connection.

• Ensure that the color of the wires of outdoor unit and the

terminal No. are the same as those of indoor unit respectively.

2. Attach the Grille onto the cabinet.

• Grasp the lower left and right side of the Grille and

engage four tabs on the top inside edge of the chassis.

• Press the Grille toward the chassis until it will be back into

place.

- 34 -

LGE Internal Use Only

Checking the Drainage, Forming the Pipings and Long Pipe Setting

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.

Accumulated drain water

Air

Waving

Water leakage

Do not raise

Water leakage

Tip of drain hose dipped in water

Ditch

Downward slope

Less than 50mm gap

- 35 -

LGE Internal Use Only

Checking the Drainage, Forming the Pipings and Long Pipe Setting

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

Trap

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

Plastic band

Taping

Drain hose

Pipings

Connecting cable

Power supply cord

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

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 tape.

• 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.

- 36 -

LGE Internal Use Only

NOTICE

Charge hose

Nitrogen gas cylinder(in vertical standing position)

Indoor unit

Outdoor unit

Lo Hi

Manifold valve

Pressure gauge

Air Purging and Evacuation

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, the indoor/outdoor unit and connecting tube must be checked for leak tight, and vacuumed to remove incondensible gas and moisture in the system.

Checking method

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. Check that both the liquid and the gas side service valves on the outdoor unit are kept closed at this stage.

Leakage 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 leak testing. The high side manifold valve must always be kept closed.

• 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:

refrigerant system in a liquid state, the top

To avoid nitrogen entering the

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 leakage 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.

:

Leakage test shoud be done for each indoor

unit connection set, separately.

- 37 -

LGE Internal Use Only

Air Purging and Evacuation

NOTICE

Indoor unit

Outdoor unit

Lo Hi

Manifold valve

Vacuum pump

Pressure gauge

Open

Close

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.

Required time for evacuation when 4 CFM vacuum

If tubing length is less

than 10m (33 ft) 10 min. or more 15 min. or more

pump is used

If tubing length is longer

than 10m (33 ft)

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 for test running.

: Repeat evacuation procedure for each indoor

unit.

- 38 -

LGE Internal Use Only

Charging

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

Any time total line set is used either shorter or longer then the nominal 22.5m(75ft: for tri-zone) 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).

Max total length

Capacity (Btu/h)

18k 30m(100ft) 15m(50ft) 5m(16ft) 7.5m(25ft) 7.5m(25ft) 20g/m(0.22oz/ft)

24k 30m(100ft) 15m(50ft) 3m(10ft) 7.5m(25ft) 7.5m(25ft) 20g/m(0.22oz/ft)

Capacity (Btu/h)

36k 45m(150ft) 15m(50ft) 3m(10ft) 7.5m(25ft) 7.5m(25ft) 20g/m(0.22oz/ft)

of all pipes

(A+B)

Max total length

of all pipes

(A+B+C)

Max length of

each pipe (A/B)

Max length of

each pipe

(A/B/C)

Min length of

each pipe (A/B)

Min length of

each pipe

(A/B/C)

Max Elevation

between each indoor

unit and outdoor unit

(h1)

Max Elevation

between each indoor

unit and outdoor unit

(h1)

Max elevation

between indoor

units (h2)

Max elevation

between indoor

units (h2)

Additional

Refrigerant

Additional

Refrigerant

Example: A 80ft line set is used for tril - zone 5 additional ft X 0.22 ounces 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) for each indoor unit. Unit is critically charged.

- 39 -

LGE Internal Use Only

Test Running

Bolt

Tubing connection

Discharge temperature

Discharge air

Intake temperature

Test Running

Split Type

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

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

1) Prepare remote controller

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

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

Reattach the cover by pushing it back into position.

4) Evaluation of the performance

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

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

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

3. Ensure the difference between the intake temperature and the discharge is more than 8°C(14.4°F) (Cooling) or reversely (Heating).

NOTE:

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

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

2) Precautions in test run

3) Settlement of outdoor unit

■ The initial power supply must provide at least 90% of the rated voltage. Otherwise, the air conditioner should not be operated.

■ For test run, carry out the cooling operation firstly even during heating season. If heating operation is carried out firstly, it leads to the trouble of compressor. Then attention must be paid.

■ Carry out the test run more than 5 minutes without fail. (Test run will be cancelled 18 minutes later automatically)

■ The test run is started by pressing timer cancel button five times continuously. (Room type)

■ To cancel the test run, press any button.

■ Anchor the outdoor unit with a bolt and nut(ø10mm)

tightly and horizontally on a concrete or rigid mount.

■ When installing on the wall, roof or rooftop, anchor the

mounting base securely with a nail or wire assuming the influence of wind and earthquake.

■ In the case when the vibration of the unit is conveyed to

the hose, secure the unit with an anti-vibration rubber.

Refrigerant

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

Outside ambient

TEMP.

The pressure of the gas side

service valve.

- 40 -

LGE Internal Use Only

Operation

Function of control

1. MAIN UNIT FUNCTION

• DISPLAY

Operation Indicator

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

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

Sleep Timer Indicator

• On while in sleep timer mode, off when sleep timer cancel or appliance operation pause

Timer Indicator

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

Defrost Indicator

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

Operation

■ Cooling Mode Operation

• When the intake air temperature reaches 0.5°C(0.9 fan stop.

°F)

• When it reaches 0.5°C(0.9

Compressor ON Temp ➲ Setting Temp+0.5°C(0.9 Compressor OFF Temp ➲ Setting Temp-0.5°C(0.9

• While in compressor running, operating with the airflow speed set by the remote control. While compressor is off fan operates at low speed regardless of the setting.

above the setting temp, they start to operate again.

°F)

below the setting temp, the compressor and the outdoor

°F)

■ Soft Dry Operation Mode

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

26°C(78.8 24°C(75.2 18°C(64.4 Intake Air Temp<18°C(64.4

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

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

operation and 4-min compressor off repeat. Compressor ON Temp. ➲ Setting Temp+0.5°C(0.9 Compressor OFF Temp. ➲ Setting Temp-0.5°C(0.9

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

°F)

≤ Intake Air Temp ➲ 25°C(77

°F)

≤ Intake Intake Air Temp<26°C(78.8

°F)

≤ Intake Intake Air Temp<24°C(75.2

°F)

°F) °F)

°F)

➲ Intake Air Temp-1°C(30.2 ➲ Intake Air Temp-0.5°C(31.1 ➲ 18°C(64.4

°F)

■ Heating Mode Operation

• When the intake air temp reaches +3°(37.4 below the setting temp, the compressor is turned on.

Compressor ON Temp. ➲ Setting Temp. Compressor OFF Temp. ➲ Setting Temp.+3°C(37.4

• While compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C(68 27°C(80.6

°F)

, it operates with the low or setting speed. When the indoor pipe temp is between 20°C(68

°F)

…above the setting temp, the compressor is turned off. When

°F)

- 41 -

°F)

, when above

°F)

LGE Internal Use Only

and

Operation

27°C(80.6

• While compressor off, the indoor fan is off when the indoor pipe temp is below 33°C(91.4

35°C(95

• While in defrost control, the indoor is outdoor fans are turned off.

°F)

, it operates with Super-Low(while in sleep mode, with the medium airflow speed).

°F)

, it operates with the low airflow speed.

°F)

, when above

■ Defrost Control(Heating)

• Defrost operation is controlled by timer and sensing temperature of outdoor pipe.

• The first defrost starts only when the outdoor pipe temperature falls below -6°C(21.2 passed from starting of heating operation and more than 4 minutes operation of compressor.

• Defrost ends after 12 minutes passed from starting of defrost operation when the outdoor pipe temperature rises over 15°C(59

• The second defrost starts only when the outdoor pipe temperature falls below -6°C(21.2 passed from ending of the first defrost and more than 4 minutes operation of compressor.

°F)

even before 12 minutes.

°F)

after 35 minutes

°F)

after 35 minutes

■ Fuzzy Operation

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

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

24°C(75.2 21°C(69.8 Intake Air Temp<21°C(69.8

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

°F)

≤ Intake Air Temp ➲ Fuzzy Operation for Cooling

°F)

≤ Intake Air Temp<24°C(75.2

°F)

➲ Fuzzy Operation for Dehumidification ➲ Fuzzy Operation for Heating

1) Fuzzy Operation for Cooling

• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(0.9

°F)

below the setting temp, the compressor is turned off. When 0.5°C(0.9 compressor is turned on.

Compressor ON Temp ➲ Setting Temp +0.5°C(0.9 Compressor OFF Temp ➲ Setting Temp + 0.5°C(0.9

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

26°C(78.8 24°C(75.2 22°C(71.6 18°C(64.4 Intake Air Temp<18°C(64.4

• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule.

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

°F)

≤ Intake Air Temp ➲ 25°C(77

°F)

≤ Intake Air Temp<26°C(78.8

°F)

≤ Intake Air Temp<24°C(75.2

°F)

≤ Intake Air Temp<22°C(71.6

°F)

°F) °F) °F)

➲ Intake Air Temp + 1°C(1.8 ➲ Intake Air Temp + 0.5°C(0.9 ➲ Intake Air Temp ➲ 18°C(64.4

°F)

or more above the setting temp, the

°F)

or more

- 42 -

LGE Internal Use Only

Operation

2) Fuzzy Operation for Dehumidification

• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(0.9 °F)

below the setting temp, the compressor is turned off. When 0.5°C(0.9 compressor is turned on.

Compressor ON Temp ➲ Setting Temp + 0.5°C(0.9 Compressor OFF Temp ➲ Setting Temp+0.5°C(0.9

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the

intake air temp at that time.

26°C(78.8 24°C(75.2 22°C(71.6 18°C(64.4 Intake Air Temp<18°C(64.4

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

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

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

dehumidification operation.

3) Fuzzy Operation for Heating

°F)

≤ Intake Air Temp ➲ 25°C(77

°F)

≤ Intake Air Temp<26°C(78.8

°F)

≤ Intake Air Temp<24°C(75.2

°F)

≤ Intake Air Temp<22°C(71.6

°F)

°F) °F) °F)

➲ Intake Air Temp+1°C(1.8 ➲ Intake Air Temp+0.5°C(0.9 ➲ Intake Air Temp ➲ 18°C(64.4

°F)

or more above the setting temp, the

°F)

or more

• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 3°C(37.4

above the setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on.

Compressor ON Temp ➲ Setting Temp Compressor OFF Temp ➲ Setting Temp + 3°C(5.4

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the

intake air temp at that time.

20°C(68 Intake Air Temp<20°C(68

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

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

• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to the

intake air temperature and the setting temperature.

°F)

≤Intake Air Temp ➲ Intake Air Temp + 0.5°C(0.9

°F)

➲ 20°C(68

°F)

or more

■ Airflow Speed Selection

• The airflow speed of the indoor fan is set to high, medium, low, or power (auto) by the input of the airflow

speed selection key on the remote control.

■ On-Timer Operation

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

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

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

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

■ Off-Timer Operation

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

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

- 43 -

LGE Internal Use Only

Operation

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

■ Off-Timer <=> On-Timer Operation

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

■ Sleep Timer Operation

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

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

• While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperature increases by 1°C(33.8

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

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

°F)

. After another 30 min elapse, it increases by 1°C(1.8

°F)

again.

■ Chaos Swing Mode

• By the Chaos Swing key input, the upper/lower 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.

■ Chaos Natural Wind Mode

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

■ Jet Cool Mode Operation

• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the

other mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated.

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

• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C(64.4

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

• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and then operated in order that the air outflow could reach further.

■ Auto Restarting Operation

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

°F)

.

- 44 -

LGE Internal Use Only

Operation

■ Forced Operation

• To operate the appliance by force in case that the remote control is lost, the forced operation selection switch is on the main unit of the appliance to operate the appliance in the standard conditions.

• When the power is supplied while the slide switch is on the forced operation position, or when the slide switch position is switched to the Auto Restarting (or test operation) position or switched from the remote control position to the forced operation position while the power is on, the forced operation is carried out.

• When the slide switch position is switched from the forced operation position to the Auto Restarting position or the remote control position, the forced operation is canceled and the appliance stops operating.

• In the forced operation mode, the indoor fan is operated at low speed for around 15 sec and then the operation condition is set according to the intake air temperature as follows.

24°C(43.2 21°C(37.8 Intake Air Temp<21°C(37.8

°F)

≤Intake Air Temp ➲ Cooling Mode Operation, 22°C(39.6

°F)

≤Intake Air Temp<24°C(43.2

°F)

➲ Dehumidification Operation, 23°C(41.4 ➲ Heating Mode Operation, 24°C(43.2

°F)

, High Speed

°F)

, High Speed

°F)

, High Speed

■ Buzzer Sounding Operation

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

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

- 45 -

LGE Internal Use Only

Operation

On/Off : Lights up during the system operation.

Sleep Mode : Lights up during Sleep Mode Auto operation.

Timer : Lights up during Timer operation.

Defrost Mode

Outdoor unit operation

: Lights up during Defrost Mode or Hot Start operation (Heat pump model only)

: Lights up during outdoor unit operation.(Cooling model only)

Desire temperature For cooling,dehumidification,heating modes it display Destired temperature indicator • Cooling : 18°C~30°C(64°F~86°F) • AI : Auto Operation

• Dehumidification : 18°C~30°C(64°F~86°F) • Po : Jet Cool

• Heating : 16~30°C(60°F~86°F) • Lo : Test Mode

• 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 delayed for approx. 3 minutes.

• High, Med, Low, Chaos, Jet Cool

• Intermittent operation of fan at low speed.

• 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.(Model base)

Split Type

Indoor Unit

Operation ON/OFF by Remote controlle

r

Sensing the Room Temperature

Room temperature control

Starting Current Control

Time Delay Safety Control

Indoor Fan Speed Control

Operation indication Lamps (LED)

Soft Dry Operation Mode

• Both the indoor and outdoor fan stops during deicing.

• Hot start after deice ends.

• The indoor fan stops until the

evaporator piping temperature will be reached at 27°C(80.6°F).

Sleep Mode Auto Control

Natural Air Control by CHAOS Logic

* Airflow Direction Control

Deice (defrost) control (Heating)

Hot-start Control (Heating)

Function of Indoor Unit

"Wall Mounted Type is standard" * Functions is dependent on model type.

- 46 -

LGE Internal Use Only

Function of Outdoor Unit

Outdoor Unit

Operating Step

LEV Control

Out door Fan Control

• Compressor step varies considering condition such as room temp,outdoor temp, operating room number,Temp gap between room temp and set temp and so on.

• LEV pulse is modulated to keep constant superheat or subcooling.

• Outdoor fan operates at High or Off to respond to the load condition.

R/Valve Control(Heating Model Only)

• Convert R/Valve to change cooling to heating, heating to cooling.

Defrost Function

• After 45 min heating operation, check the defrost condition and if outdoor pipe temp is below -

5°C(23°F) and released from deice operation in case outdoor pipe temp is over 12°C(53.6°F) or 9 min cooing mode.

•

To deice outdoor heat exchanger in low temp condtion, convert operating mode from heating to cooling mode.

Oil Return System

• In single(one) comp operation duration, another comp will operate for 30 seconds every 1 hours.

Comp Overload Protection

• To protect comp from being overload, protector will turn off the comp.

High Pressure Protction

• If cycle pressure is too high(around 36.7 kgf/cm2), it will turn off comp A

Operation

- 47 -

LGE Internal Use Only

Operation

ON

OFF

CANCEL

AUTO CLEAN

SET

1

3

5

4

9

10

12

14

16

7

2

8

13

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( )

15

Operation Mode

(Heat Pump)

(Cooling Only)

Remote Control Operation

The Remote Controller transmits the signals to the system.

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.

JET COOL

5.

Used to start or stop the speed cooling/heating. (speed cooling/heating operates super high fan speed.)

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. RESET BUTTON

Used prior to resetting time.

14. 2nd F Button

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

15. AUTO CLEAN

Used to set Auto Clean mode.

16. ˚C TO ˚F SWITCHING BUTTON

Used to switch temperature reading from Centigrade to Fahrenheit.

- 48 -

LGE Internal Use Only

Disassembly

Earth Conductor

Indoor Unit

Split Type Indoor Unit

Disconnect the unit from power supply before making any checks. Be sure the power switch is set to “OFF”.

To remove the Grille from the Chassis.

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

• Remove the securing screws.

• To remove the Grille, pull the lower left and right side of the grille toward you (slightly tilted) and lift it straight upward.

Disassembly

1. Before removing the control box, be sure to

take out the wire screwed at the other end.

- 49 -

LGE Internal Use Only

Disassembly

Screw

2. To remove the Control Box.

• Remove securing screws.

• Pull the control box out from the chassis carefully.

3. To remove the Discharge Grille.

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

4. To remove the Evaporator.

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

• When repair, do not damage the Caution label.

- 50 -

LGE Internal Use Only

• Unhook the tab on the right inside of the chassis

Motor cover

Bearing

Cross-flow fan

at the same time, slightly pull the evaporator toward you until the tab is clear of the slot.

5. To remove the Motor Cover

• Remove 2 securing screw.

• Pull the motor cover out from the chassis carefully.

Disassembly

6. To remove the Cross-Flow Fan

• Loosen the screw securing the cross-flow fan to the fan motor (do not remove).

• Lift up the right side of the cross-flow fan and the fan motor, separate the fan motor from the cross-flow fan.

• Remove the left end of the cross-flow fan from the self-aligning bearing.

- 51 -

LGE Internal Use Only

Disassembly

Schematic Diagram

Electronic Control Device

1. Indoor Unit

1) Split Type

- 52 -

LGE Internal Use Only

2. Outdoor Unit

P07

SW01F

OR2H,OR7H,OR10H:91K,OR3H-4H,OR8H-9H,OR11H-12H:15K(ETC:20K)

R03T

11

DC 5V

56K

R04T

1K

1

2

7036P

IC01A

CN-JIG

3

4

3

4

22

JIG_RX

JIG_TX

DC 5V

10K

R01T

1K

R02T

C01H-C04H : 103

P21

21

JIG_RX

26

OSC01B

CST-8.00MGW

JIG_TX

+

3

C02A

10

R03A,100

50V

25V

0.01

C01A

R02A,4.7K

R01A,1K

Xin

Vss

Xout

R01B,1M

25

24

P22

RESET

23

22

P20

19

R01F,1K

R02F,10K

R02G,10K

R01G,10K

R04G,10K

R03G,10K

P32

29

30

P33

28

27

P31

P30

L4(C)

L3(C)

L1(A)

L2(B)

PWM(A)

PWM(C)

PWM(B)

P53

P54

46

47

P52

45

51

P60

50

P62

P63

P61

52

53

31

P37

343536

P41

P40

33

32

P36

P35

RX(C)

RX(B)

TX(C)

RX(A)

TX(B)

14

13

P13

P12

P34

111012

P10

P11

TX(A)

CN-LEV(C)

CN-LEV(B)

DC 5V

+

C52M

220

50V

231

5

4

5

4

IC03M

44

220

50V

+

C51M

1 132

3

2

50V

55

1

+

220

C50M

1

22

11

OUT_PIPE

OUT_TH

22

33

44

CN-TH2

SUCTION

33

44

DC 5V

R05H-R20H

(ETC: 12.1K 1%)

(R05H,R06H,R07H:6.2K 1%)

DISCHARGE

CN-TH1

11

41

R01H,1K

60

P71

P66

P65

P64

555654

P70

P67

59

57

63

P73

P72

R04H,1K

62

61

P76

P74

P75

R02H,1K

R03H,1K

1

64

7 8 9

P05

P06

5

6

P02

P04

P03

P51

44 4 3

P00

P01

42

43

P47

P50

MICOM

TMP87CM41F

58

TEST

P77

20

2

VSS

AVDD

49

48

VDD

Q01Z

KRA107M

39

40

P44

P46

P45

38

37

P42

P43

DC 5V

CN-LEV(A)

IC02M

423

5 5

RY-COMP(A)

RY-FAN(H)

RY-COMP(B)

IC01M

R01Z-R07Z : 4.7K

RY-LIQ

RY-FAN(L)

RY-GAS

RY-4WAY

DC 15V

Schematic Diagram

- 53 -

LGE Internal Use Only

Schematic Diagram

23.2K

8.06K

23.2K

8.06K

1%

51.1K

102

100V

C25M

1%

9.1k

R27M

100uf

C24M

+

2

5

4

6

100uF

25V

C26M

R28M

13K

1%

1

5

+

R29M,2K,1%

4

22

51.1K

10K

1

2.94K

6

7

4.7K

PWM(C)

35.7K

4.3K

R26M

10.2K

3

2

1

21.5K

6.04K

KRA101M

Q07M

DC 5V

7

3K 5.23K39.2K 13K

20 20

9

8

R04S

20K

14

51.1K

102

C14M

100V

R15MC13M+1%

100uf 9.1k

2

5

4

6

C15M

25V

100uF

R16M

1

5

+

1%

13K

R17M,2K,1%

4

22 10K

1

51.1K

2.94K

6

7

4.7K

PWM(B)

35.7K

4.3K

10.2K

R14M

2

3

1

21.5K

6.04K

Q04M

KRA101M

DC 5V

7

3K 5.23K39.2K 13K

20

8

20

9

R04S

14

20K

51.1K

102

100V

C02M

R02M

9.1k

1%

100uf

C01M

+

2

5

4

6

100uF

25V

C03M

1

5

R03M

13K

1%

+

R04M,2K,1%

4

22 10K

1

51.1K

6

7

2.94K

PWM(A)

4.7K

35.7K

4.3K

R01M

10.2K

1%

2

3

1

21.5K

6.04K

KRA101M

Q01M

7

DC 5V

3K 5.23K39.2K 13K

R04S

8

20 20

9

14

20K

51.1K

RY-COMP(B)

RY-COMP(A)

51.1K

2SD2220

Q08M

51.1K

R31M

220

3

34K

100K

R33M

1.5K103K

100V

R34MC31M

Vm(C)

MT 15V

94

S/W TRANS6

2

3 7

Q09M

30,1W

R37M

ZD03M

12V

200

R36M

472/250V

C30M

100V

473K

C27M

2

8

10K

R32M

IC06M

63V

680uF

C28M

+

821K

C29M

1KV

L10M

L09M

FMX12S

D05M

Q05M

2SD2220

R19M

51.1K

220

3

34K

R21M

100K

1.5K103K

100V

R22MC21M

Vm(B)

ERB-44-08

D06M

8 4

6

S/W TRANS5

L12M

L11M

11 2

1KV

222K

C33M

3W

68K

R35M

C32M

MT 15V

94

S/W TRANS4

2

3 7

Q06M

R25M

30,1W

12V

200

R24M

ZD02M

u-POWER MODULE

NF02J

C09J~C10J

1uF

C08J

222*2

25V

ZNR01J~ZNR02J

uRM1515-2B

302

D01J

C04J

1M

C06J~C07J

C05J

9mH

472*3

R01J

1mH

NF01J

1uF

C03J

35V

C10D

102M

561*2

C04D

35V

470UF

12uH

L01D

1000UF

35V

220uF

C05D

10V

220uF

C03D

DC 5V

DC 15V

IC04D

C06D

50V

103

7805

C07D

50V

+

103

C02D

470uF

+

2K

R02D

1/2W

MT 15V

C08D

103

50V

L02D

12uH

D101

FB

12

OUT

R202

9

7

+

C01D

GND

PC201

D201

R201

D202

268

C102

BP

TNY

S

D

13

+

C101

R102

OUT

GND

3

NC

DC 0V

6

5

PC201

GND

NC

DC 310V

1

IN

R101

D01D

1N4937

RY-FAN(L)

RY-FAN(H)

RY-GAS

LIVE1

3 3

CN-POWER

NEUTRAL

1

FUSE

ZNR01J

250V/T5A

INR14D471K

SVC561D-14A

1

COMP B

COMP A

43

LIVE2

43

NF01M

HOT GAS

FAN LOW

FAN HI

1

NF02M

1

NF04M

NF03M

1

CN-FAN

COM(A)

COM(B)

COM(C)

DKS-10D-22

1/2W

560K

R11M

51.1K

472/250V

C19M

C16M

100V

473K

8

2

10K

R20M

IC05M

63V

C17M

680uF

+

C18M

821K

1KV

L06M

L05M

FMX12S

D03M

Q02M

2SD2220

51.1K

R06M

220

3

34K

R08M

100K

1.5K103K

100V

R09MC09M

Vm(A)

ERB-44-08

D04M

8 4

6

S/W TRANS3

L08M

L07M

11 2

C23M

1KV

222K

R23M3W68K

C22M

MT 15V

94

S/W TRANS2

3

2

7

Q03M

30,1W

R13M

ZD01M

12V

200

R12M

472/250V

C07M

C04M

473K

100V

8

2

R07M

10K

IC04M

C05M+63V

680uF

C06M

821K

1KV

L02M

L01M

D01M

FMX12S

ERB-44-08

D02M

8 4

6

S/W TRANS1

L03M

L04M

11 2

1KV

C11M

222K

3W

68K

R10M

C10M

+

NTC

450V

330UF

C12M

COM(B)

3

20TX(B)

1K

R14K

102

C03K

TX(C)

RX(C)

RX(B)

RY-LIQ

RY-4WAY

R15K

10K

R12K

10K

R16K

3

2

1

8

4

20

8

4

7

5

6

R10K

1K

C02K

102

2

1

4

IC03K

4

7

5

6

8

COM(C)

DC 15V

Vm(C)

Vm(B)

DC 15V

DC 0V

BD01M

D15XB60

DC 310V

RX(A)

DC 15V

TX(A)

DC 5V

R13K

1K1K

R01K

1K

R09K

10K

R07K

R05K

R11K

10K

C01K

1K

102

8

4

7

5

6

10K

R06K

IC02K

10K

R08K

8

R02K

R04K

10K

R03K

IC01K

2

3

1

8

4

20

COM(A)

Vm(A)

DC 15V

LIQUID

1

NF05M

1

4WAY

324

314

3

1

CN-COM3

4

412

CN-COM2

231

CN-COM1

231

LGE Internal Use Only

- 54 -

Wiring Diagram

1. Indoor Unit

Schematic Diagram

2. Outdoor Unit

1)A-MMH18FA-1 2) A-MMC24FA-1

- 55 -

LGE Internal Use Only

Schematic Diagram

3) A-MMH24FA-1 4) A-MMC36FA-1

5) A-MMH36FA-1

- 56 -

LGE Internal Use Only

Components Locations

PCB :6870A90409B ASSY:6871A20771

6871A20782

1. Indoor Unit

MAIN P.C.B ASM

1) Split Type

• TOP VIEW

Schematic Diagram

• BOTTOM VIEW

- 57 -

LGE Internal Use Only

Schematic Diagram

2. Display ASSEMBLY

1) Split Type (6871A20680)

- 58 -

LGE Internal Use Only

3. Outdoor Unit

1) Component side

Schematic Diagram

- 59 -

LGE Internal Use Only

Schematic Diagram

2) Solder side

- 60 -

LGE Internal Use Only

Troubleshooting Guide

Refrigerant Flow

Cooling

Heating

Th1: Discharge thermistor Th2: Discharge thermistor Th3: Outdoor temperature thermistor Th4: Defrost thermistor

Field Piping Gas

Field Piping Liquid

Room A

EEV-B

EEV-A

Heat Exchanger

Header

OUTDOOR UNIT

Room B

Ø9.52

Room A

Room B

Ø6.35

Ø9.52

Th2

High pressure S/W

Th3

Th4

Th1

Constant

Compressor

Constant

Compressor

Accumulator

Strainer

Field Piping Gas

Field Piping Liquid

Refrigerant Flow

Th1: Discharge thermistor Th2: Discharge thermistor Th3: Outdoor temperature thermistor

Room A

Cooling

EEV-B

EEV-A

Heat Exchanger

Header

OUTDOOR UNIT

Room B

Ø9.52

Room A

Room B

Ø6.35

Ø9.52

Th2

High pressure S/W

Th3

Th4

Th1

Constant

Compressor

Constant

Compressor

Accumulator

Strainer

Refrigeration Cycle Diagram

1. A-MMH18FA-1

Troubleshooting Guide

2. A-MMC24FA-1

- 61 -

LGE Internal Use Only

Troubleshooting Guide

Refrigerant Flow

Cooling

Heating

Th1: Discharge thermistor Th2: Discharge thermistor Th3: Outdoor temperature thermistor Th4: Defrost thermistor

Field Piping Gas

Field Piping Liquid

Room A

EEV-B

EEV-A

Heat Exchanger

Header

OUTDOOR UNIT

Room B

Ø9.52

Room A

Room B

Ø6.35

Ø9.52

Th2

High pressure S/W

Th3

Th4

Th1

Constant

Compressor

Constant

Compressor

Accumulator

Strainer

Field Piping Gas

Field Piping Liquid

Refrigerant Flow

Th1: Discharge thermistor Th2: Discharge thermistor Th3: Outdoor temperature thermistor

Room A

Cooling

EEV-B

EEV-A

Heat Exchanger

Header

OUTDOOR UNIT

Room B

Ø9.52

Room A

Room B

Ø6.35

Ø9.52

Room C

Ø9.52

Th2

High pressure S/W

Th3

Th1

EEV-C

Room C

Constant

Compressor

Constant

Compressor

Accumulator

3. A-MMH24FA-1

4. A-MMC36FA-1

- 62 -

LGE Internal Use Only

Refrigerant Flow

Cooling

Heating

Th1: Discharge thermistor Th2: Discharge thermistor Th3: Outdoor temperature thermistor Th4: Defrost thermistor

Field Piping Gas

Field Piping Liquid

Room A

EEV-B

EEV-A

Heat Exchanger

Header

OUTDOOR UNIT

Room B

Ø9.52

Room A

Room B

Ø6.35

Ø9.52

Room C

Ø9.52

Th2

High pressure S/W

Th3

Th4

Th1

EEV-C

Room C

Ø6.35

Constant

Compressor

Constant

Compressor

Accumulator

5. A-MMH36FA-1

Troubleshooting Guide

- 63 -

LGE Internal Use Only

Troubleshooting Guide

LED1

LED2

Self-diagnosis Function

■ Error Indicator

• The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble.

• Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table.

• If more than two troubles occur simultaneously, primarily the highest trouble fo error code is expressed.

• After error occurrence, if error is released, error LED is also released simultaneously.

• To operate again on the occurrence of error code, be sure to turn off the power and then turn on.

• Having or not of error code is different from Model.

Indoor Error

Error code Description MPS Variable LED1 LED2 Indoor Status

00 No Error ON

01 Indoor Room Thermistor Error 1 time OFF

02 Indoor In-Piping Error 2 times OFF

05 Communication Error between In and Out 5 times OFF

06 Indoor Out-Piping Error 6 times OFF

07 Differnt mode operation 7 times OFF

10 Indoor fan motor locked error 1 times OFF

Outdoor Error

Error code Description MPS Variable LED1(Red) LED2(Green) Indoor Status

33 D-Pipe High(Normal) 3 times 3 times OFF

44 Outdoor Air Thermistor Error(Open/Short) 4 times 4 times OFF

45 Cond Pipe Thermistor Error(Open/Short) 4 times 5 times OFF

47

51 Capcity Error(High/Low)

Const. D-Pipe Thermistor Error(Open/Short)

- 64 -

4 times 7 times OFF

5 times 1 times OFF

LGE Internal Use Only

Cycle Troubleshooting Guide

Trouble analysis

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

Troubleshooting Guide

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

rated current

Temp. Difference

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

rated current

Operating Current

Temp. difference : less than 8°C Current : near the rated cur-

rent

Temp. difference : over 8°C

Notice:

Temperature difference between intake and discharge air depends on room air humidity. When the room air humidity is relatively higher, temperature difference is smaller. When the room air humidity is relatively lower temperature difference is larger.

(14.4°F)

All amount of refrigerant leaked out. Check refrigeration cycle.

Refrigerant leakage Clog of refrigeration cycle Defective compressor

Excessive amount of refrigerant

Normal

2. Check temperature and pressure of refrigeration cycle.

Suction pressure Temperature

(Compared with (Compared with Cause of Trouble Description

the normal value) the normal value)

High Defective compressor Current is low.

Higher

Normal Excessive amount of High pressure does not quickly

refrigerant rise at the beginning of operation.

Insufficient amount of Current is low.

Lower Higher refrigerant(Leakage)

Clogging

Notice:

1. The suction pressure is usually 4.5~6.0 kg/cm2G at normal condition.

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

- 65 -

LGE Internal Use Only

Troubleshooting Guide

Electronic Parts Troubleshooting Guide

❇ Refer to electronic contorol device drawing & schematic diagram.

Trouble 1

Check the voltage of power(AC208V/AC230V, 60Hz).

• The voltage of main power.

• The voltage applied to the unit.

• The connecting method of Indoor/Outdoor connecting cable (each color)

• The P.W.B. Ass'y (Fuse, Noise Filter, Power Transformer, IC01D, IC02D, etc.)

The Product doesn’t operate at all.

Turn off the main power and wait until LED on outdoor PCB is off.

Turn on the main power again.

Does "Beeping" sound is made from the indoor unit?

NO

YES

• Primarily, the operating condition of Micom is O.K.

• Check CN-DISP1

The operation check of the P.C.B. Ass'y

Procedure

1) The input voltage of power transformer.

2) The output voltage of power transformer.

3) IC01D(7812)

4) IC02D(7805)

5) IC01A(KIA7036)

1) AC230V ± 30V : Check the rated voltage

2) 15V ± 1.5V

3) DC12V

4) DC5V

5) The voltage of micom pin 29 : DC4.5V↑

Specification

- 66 -

Remedy

1) Replace power transfomer.

2) Replace power transfomer.

3) Replace IC01D.

4) Replace IC02D.

5) Replace IC01A.

LGE Internal Use Only

Troubleshooting Guide

Trouble 2

(When operated in the Sleeping Mode, the wind speed is set to the low speed as force.)

Caused by the remote controller.

Product doesn't operate with the remote controller.

Turn on main power.

While the compressor has been stopped, the compressor does not operate

owing to the delaying function for 3 minutes after stopped.

When the compressor stopped Indoor Fan is driven by a low speed.

At this point the wind speed is not controlled by the remote controller.

Caused by other parts except

the remote controller

When the mark ( ) is displayed in LCD

screen, replace battery.

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 Display PWB Ass'y • Check receiver ass'y

Check the contact of CN-DISP 1 connector

Check DISP PWB Ass'y

-Voltage between CN1 ➀ - ➆ : DC +5V

- 67 -

LGE Internal Use Only

Troubleshooting Guide

Trouble 3

Operate Cooling Mode by setting the disired temperature of the remote controller is less than one of the Indoor temperature by 1°C at least.

Check the sensor for Indoor temperature is attatched as close as to be effected by the themperature of Heat Exchange (EVA.)

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

The Compressor/Outdoor Fan are don't operate

Turn on the main power.

When in air circulation mode, compressor/outdoor fan is stopped.

• Check the related circuit of R01H(1K), R02H(1K), R03H(1K), R04H(1K), Micom(pin No. 74 ,

75 , 76 , 77 ).

• Check the Indoor temperature sensor is disconnected or not (about 10K at 25°C).

Check the Relay(RY-PWR, RY-START) for driving Compressor.

• Check the voltage between brown and blue cable of terminal to connect the Outdoor (About AC208V / 230V).

• Check the related circuit of relay in Outdoor PCB Ass'y.

Check Point

Between Micom(No. 50,51) and GND

Between IC01M(No. 10) and GND

Comp. ON Comp. OFF

DC 5V DC 0V

DC 12VDC 1V↓

Turn off main power.

Check the electrical wiring diagram of Outdoor side. Check the open or short of connecting wires between Indoor and Outdoor.

- 68 -

LGE Internal Use Only

Troubleshooting Guide

Trouble 4

When indoor Fan does not operate.

Does the voltage of each terminals of CN-MOTOR CONNECTOR in Indoor unit corresponds to values in the Table of page 69

Does the voltage of terminal of CN-DC/DC CONNECTOR in Indoor unit corresponds to the values in the table of page 56

Do the voltage of terminal of CN-DC/DC CONNECTOR in Outdoor unit corresponds to the values in the table of page 56

NO

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

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

YES

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

Check connecting condition of the CN-MOTOR CONNECTOR

Check the interference of Indoor Fan.

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)

- 69 -

LGE Internal Use Only

Troubleshooting Guide

Trouble 5

When the louver does not operate.

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 pin (RED) of CN-UP/DOWN and

GND.

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

- Between 60 , 61 , 62 and 63 of MICOM

- Between

- Between 12 , 13 ,

- Between

2 , 3 , 4 and 5 of IC01M

14 , 15

of IC01M

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

- 70 -

LGE Internal Use Only

Error Code

■ Trouble Shooting

Troubleshooting Guide

Error code

01 Indoor air sensor

02 Indoor inlet pipe sensor

06 Indoor outlet pipe sensor

Title Cause of error Check point & Normal condition

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

10KΩ

Ω

Normal resistor : 10KΩ / at 25°C(77°F) (Unplugged) Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)

Normal resistor : 5KΩ/ at 25°C(77°F) (Unplugged) Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)

2.5Vdc

V

Check the resistance / voltage

❑ Check Point

1. Unplug the sensor on Indoor unit PCB.

2. Estimate the resistance of each sensor

3. If the resistance of the sensor is 10KΩ/5KΩ at 25°C(77°F), then sensor is normal

4. If the resistance of the sensor is 0 KΩ or ∞, then sensor is abnormal. ➔ Change the sensor.

5. Plug the sensor on Indoor unit PCB and Power ON.

6. Estimate the voltage of each sensor.

7. If the voltage of the sensor is 2.5Vdc / at 25°C(77°F), then sensor is normal.

8. If the resistance of the sensor is 0 or 5Vdc, then sensor is abnormal. ➔ Repair or Change the PCB

- 71 -

LGE Internal Use Only

Troubleshooting Guide

Error

code

05 / 53

Communication (Indoor ➔ Outdoor)

Title Cause of error Check point & Normal condition

• Power input AC 230V.(Outdoor, Indoor)

• The connector for transmission is disconnected.

• The connecting wires are misconnected.

• Communication poorly

• The GND 1,2 is not connected at main GND.

• The communication line is shorted at GND.

• Transmission circuit of outdoor PCB is abnormal.

• Transmission circuit of indoor PCB is abnormal.

❑ Check Point

1. Check the input power AC 230V.(Outdoor, Indoor)

2. Check the communication wires are correctly connected.

➔ Adjust the connection of wire ➔ Confirm the wire of "Live", "Neutral".

3. Check the resistance between communication line and GND.(Normal : Over 2MΩ)

4. Check the connector for communication is correctly connected.

5. Check the connection of GND1, GND2, and main GND.

6. If one indoor unit is operated normally, outdoor PCB is no problem. ➔ Check the another indoor unit.

* CH05 is displayed at indoor unit, CH53 is displayed at outdoor unit.

- 72 -

LGE Internal Use Only

Troubleshooting Guide

Error code

33 D-Pipe Temp. High

Title Cause of error Check point & Normal condition

115°C(239°F)

100°C(212°F)

95°C(203°F)

❑ Check Point

1. Check the install condition for over load.

2. Check the SVC V/V open.

3. Check the leakage of refrigerent.

4. Check the constant compressor.

• Discharge sensor temp. high

COMP OFF

LEV OPEN(16PULSE/MIN)

LEV OPEN(10PULSE/MIN)

NORMAL

• Check the discharge pipe sensor.

• Check the install condition for over load.

• Check the leakage of refrigerent.

• Check the SVC V/V open.

Error code

51 Capacitor error

Title Cause of error Check point & Normal condition

❑ Check Point

1. Check the indoor unit capacity.

2. Check the combination table.

★ In the tropical model case ➔ single cycle has no error for over capacity.

• Over Capacitor combination

• Check the indoor unit capacity.

• Check the combination table

- 73 -

LGE Internal Use Only

Troubleshooting Guide

Error

code

44 Outdoor air sensor

45 Condensor pipe sensor

47 D-Pipe sensor

Title Cause of error Check point & Normal condition

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

Ω

Normal resistor : 10KΩ / at 25°C(77°F) (Unplugged) Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)

Normal resistor : 5KΩ/ at 25°C Normal voltage : 2.5Vdc / at 25°C

Normal resistor : 200KΩ/ at 25°C Normal voltage : 4.5Vdc / at 25°C

(77°F)

(Unplugged)

(plugged)

(Unplugged)

(plugged)

Check the resistance

❑ Check Point

1. Estimate the resistance of each sensor.(Unplugged)

2. Estimate the voltage of each sensor.(Plugged)

3. If the resistance is 0V or 5Vdc, then sensor is abnormal

- 74 -

LGE Internal Use Only

2-way, 3-way Valve

Flare nut

To piping connection

Open position Closed position

Flare nut

Valve cap

To piping connection

Open position Closed position

Hexagonal wrench (4mm)

To outdoor unit

Service port

Service port cap

To outdoor unit

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

2-way, 3-way Valve

Works Shaft position Shaft position Service port

Shipping Closed Closed Closed

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

Air purging Open Closed Open

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

1. vacuum pump)

Operation Open Open Closed

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

Pumping down Closed Open Open

2.

(Transfering) (clockwise) (counter-clockwise) (connected

Evacuation Open Open Open

3.

4.

(Servicing) (with charging

cylinder)

Gas charging Open Open Open

(Servicing) (with charging

cylinder)

manifold gauge)

Pressure check Open Open Open

5.

6.

(Servicing) (with charging

Gas releasing Open Open Open

(Servicing) (with charging

- 75 -

cylinder)

LGE Internal Use Only

2-way, 3-way Valve

Indoor unit

Outdoor unit

Liquid side

Close

Gas side

2-Way

valve

Open

3-Way

valve

manifold gauge

Indoor unit

Liquid side

Close

Gas side

2-Way

valve

Open

3-Way

valve

Hi- handle (CLOSE)

Lowhandle (CLOSE)

(1) Pumping down

• Procedure

1. Confirm that both the gas side and liquid 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 manifold gauge to the service port of the gas side valve.

- Connect the hose of the gauge with the push pin to the service port.

4. Air purging of the charge hose.

- Open the Low-handle valve on the gauge slightly to air purge from the hose.

6. Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg/cm2g.

7. Immediately set the gas side valve to the closed position.

- Do this quickly so that the gauge ends up indicat-

ing 1kg/ g.

8. Disconnect the charge set, and mount the liquid side and gas side valve caps and the service port nut.

- Use torque wrench to tighten the service port nut to

a torque of 1.8kg.m.(156.2 lbf·in) [4.2kg.m (364.5

lbf·in)/5.5kg.m (477.4 lbf·in)]

- Be sure to check for gas leakage.

5. Set the liquid side valve to the closed position.

• Be sure to short pressure S/W. otherwise Low pressure S/W detect low pressure skete and stops the compressor.

- 76 -

LGE Internal Use Only

(2) Evacuation

Indoor unit

Outdoor unit

Liquid side

Open

Gas side

2-Way

valve

Open

3-Way

valve

manifold gauge

Indoor unit

Liquid side

Open

Gas side

2-Way

valve

Open

3-Way

valve

Vacuum pump

Hi- handle (OPEN)

Lowhandle (OPEN)

(All amount of refrigerant leaked)

2-way, 3-way Valve

• Procedure

1. Confirm that both the liguid side valve and gas side valve are set to the opened position.

2. Connect the vaccum pump to the center hose of the manifold gauge.

3. Connect the service port of the gas side valve to the low side of the gauge.

4. Evacuation for approximately one hour.

- Confirm that the gauge needle has moved

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

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

6. Disconnect the charge hose from the vacuum pump.

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

7. Mount the valve caps and the service port caps.

- 77 -

LGE Internal Use Only

2-way, 3-way Valve

manifold gauge

Charging

cylinder

Hi- handle (OPEN)

Low-handle

(OPEN)

Check valve

Indoor unit

Outdoor unit

Liquid side

Open

Gas side

2-Way

valve

Open

3-Way

valve

Indoor unit

Liquid side

Open

Gas side

2-Way

valve

Open

3-Way

valve

(3) Gas Charging

(After Evacuation)

• Procedure

1. Connect the gauge to the charging cylinder.

- Connect the charge hose which you disconnected 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 low handle on the gauge 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 gas side valve's service port.

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.

- Stopping partway will allow the gas to be dis-

charged.

- If the system has been charged with liquid

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

5. Mount the valve stem nuts and the service port nut.

- Use torque wrench to tighten the service port nut to a torque of 1.8 kg.m.(4.2kg.m/5.5kg.m.)

- Be sure to check for gas leakage.

- 78 -

LGE Internal Use Only

135301

152302B

152302A

342800

567480B

Air inlet +

Eva in

Eva out

567480A

359011

131410 733010

135312

135311

147581

268711A

146811

147582

346810

135516

35211B

354210

249951

352150

268711B

268711C

267110

135500

152313

Exploded View

Indoor Unit

Model : B-MMC09FA-1, B-MMH09FA-1, B-MMC12FA-1, B-MMH12FA-1

Exploded View

- 79 -

LGE Internal Use Only

Exploded View

435512

435301

349480

437211

430411

559010

447910

546810

349600

554030

137213B

137213A

435300

567480C

552112

552113A

548490

435511A

552203A

552203B

552203A

552203B

554160A

554160B

661400B

552200

566000

H/P switch

552113B

552114

552201

661400B

649950

W0CZZB

W0CZZA

268711F

561410

567480D

Discharge

552116

435511B

268711H

552202

Outdoor Unit

Model : A-MMH18FA-1

- 80 -

LGE Internal Use Only

552113B

552202

561410

Heat pump type

649950

268711F

268711H

435511

552203A

552203B

552203A

552203B

554160A

554160B

Internal

OLP Type

Internal

OLP Type

661400A

552200

567480C

Inlet air + pipe

567480D

Discharge

W0CZZA

349600

W0CZZB

554030

435512

559010

435301

349480

546810

447910

437210

430410

437211

552201

137213A137213B

435300

566000

L/P switch

552114

552116

552113A

552112

661400B

Model : A-MMC24FA-1, A-MMH24FA-1

Exploded View

- 81 -

LGE Internal Use Only

546810

349600

552113B

559010

552116

Heat pump type

552203A

552203B

554160B

Internal

OLP type

554160A

567502

554030

447910

430410

435512

435301

349480

435301

349480

437211

137213A137213B

435300

548490

552112

552113

552114

567480C

Air inlet+Pipe

W6640

567480D

Discharge

649950

268711F

268711H

W0CZZA

W0CZZB

435511

561410

552201

552202

661400A

552200

661400B

661400C

Exploded View

Model : A-MMC36FA-1, A-MMH36FA-1

- 82 -

LGE Internal Use Only

Specifications and performance data subject to change without notice.

HEAT CONTROLLER, INC.

1900 WELLWORTH AVENUE • JACKSON, MICHIGAN 49203

THE QUALITY LEADER IN CONDITIONING AIR

P/No.:3828A20390X

Lg B-mmh09fa-1, B-mmc12fa-1, B-mmc09fa-1, A-mmh36fa-1, A-mmc36fa-1 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual