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Multi Air Conditioner SVC MANUAL(Exploded View) MODEL : Indoor Unit: FMN0760NL/M/N/Q FMN0960NL/M/N/Q FMN1260NL/M/N/Q FMN1860NL/M/N/Q FMN2460NL/M/N/Q FMN0960NFD/M/B FMN1260NFD/M/B

Outdoor Unit: FMU1860N2L/M/N/Q FMU2160N3L/M/N/Q FMU3060N4L/M/N/Q

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

Contents Functions...................................................................................................................................... 3 Product Specifications .................................................................................................................6 Dimensions....................................................................................................................................8 Wiring Diagram ...........................................................................................................................10 Refrigeration Cycle Diagram......................................................................................................11 Operation Details ........................................................................................................................12 Display Function .........................................................................................................................17 Self-diagnosis Function .............................................................................................................17 Installation ...................................................................................................................................18 Operation .....................................................................................................................................36 Disassembly of the parts (Indoor Unit) .....................................................................................38 Valve Service(3-way)...................................................................................................................42 Cycle Troubleshooting Guide ....................................................................................................46 Electronic Parts Troubleshooting Guide...................................................................................47 Electronic Control Device ..........................................................................................................60 Schematic Diagram.....................................................................................................................65 Exploded View.............................................................................................................................68

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

Functions Indoor Unit Operation ON/OFF by Remote controller Sensing the Room Temperature • Room temperature sensor. (THERMISTOR) Room temperature control • Maintains the room temperature in accordance with the Setting Temp. Starting Current Control • Indoor fan is delayed for 5 seconds at the starting. Time Delay Safety Control • Restarting is inhibited for approx. 3 minutes. Indoor Fan Speed Control • High, Med, Low, Chaos Operation indication Lamps (LED) --- Lights up in operation --- Lights up in Sleep Mode --- Lights up in Timer Mode --- Lights up in Deice Mode

Soft Dry Operation Mode • Intermittent operation of fan at low speed. Sleep Mode Auto Control

Deice (defrost) control (Heating)

• The fan is switched to low(Cooling), med(Heating) speed. • The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours. Natural Air Control by CHAOS Logic • The fan is switched to intermittent or irregular operation • The fan speed is automatically switched from high to low speed. Airflow Direction Control

• Both the indoor and outdoor fan stops during deicing. • Hot start after deice ends. Hot-start Control (Heating) • The indoor fan stops until the evaporator piping temperature will be reached at 28°C.

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

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

-3-

LGE Internal Use Only

Outdoor Unit Power relay control • If power is on, it will operate to chage capacitor on controller and power relay will operate after about 10sec. Comp. Freq. control • The final operating freq. of comp. is set the lowest freq. that limited outdoor temp., discharge pipe temp., target freq., owing to CT. Overheatng. Protection(Power module)

Freq. speed control(up/down speed) V/F control • It will be changed the drive voltage of comp. according to operating frequency. Total current control (over current protection) DC peak current control 4 way valve control • It is only operated in the heating operation mode except defrosting operation. Outdoor fan motor control • High speed/Low speed Discharge pipe temp. control Overpressure protection

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

Remote Controller Operation ON/OFF

Operation Mode Selection Cooling Operation Mode.( (Cooling (Heating model only) model only)

)

Healthy Dehumidification Operation Mode.(

Auto Operation Mode.(

)

) Heating Operation Mode.(

)

Fan Speed Selection (Low)

(Med)

(High)

(CHAOS)

Room, Temperature Display : (High: 39°C

LOW : 11°C)

Temperature Setting TEMPERATURE

HIGH

LOW

Cooling

Down to 18°C Heating Up to 30°C

Down to 16°C Up to 30°C

JET COOL

Setting the Time or Timer

Timer Selection ON

OFF

: OFF, ON, OFF

ON

Timer Setting SET

Timer Cancel CANCEL

: Cancel Sleep Mode, Timer ON or Timer OFF

Sleep Operation : 1, 2, 3, 4, 5, 6, 7, Off Timer Airflow Direction Control

Fan Operation Mode : Fan Operates without cooling or heating. Reset

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

Product Specifications Model Item

Cooling Capacitor (Outdoor) Heating Capacitor (Indoor) Heating Capacitor (Outdoor) Moisture Removal

Air Circulation

FMU1860N2L/M/N/Q, FMU2160N3L/M/N/Q

Outdoor

Cooling Capacitor (Indoor)

Power Supply

Indoor FMN0760NL/M//N/Q FMN0960NL/M/N/Q FMN1260NL/M/N/Q FMN1860NL/M/N/Q (FMN0960NFD/M/B) (FMN1260NFD/M/B)

Btu/h

7,000

9,000

12,000

18,000

W

2,051

2,673

3,517

5,274

Btu/h

7,000 ~ 24,000

W

2,051 ~ 7,034

Btu/h

8,000

10,000

13,800

19,000

W

2,344

2,930

4,044

5,567

Btu/h

7,000 ~ 26,100

W

2,051 ~ 7,649

l /h

1.0

Ø, V, Hz Indoor, Max Outdoor, Max Indoor, Med Indoor, Low

6.5

CMM

7.0(7.5)

Running Current Motor Output

Dimensions

Net Weight Refrigerant

Cooling Heating Cooling Heating Indoor Outdoor

dB(A)±1

38(39)

40(44)

44

33

34(36)

38(41)

41

30

32(33)

36(34)

39

820 ~ 2,690 1,060 ~ 2,700 4.4 ~ 12.7

A

5.4 ~ 12.8 7.5

W

Outdoor

(W*D*H)

R-22

7.5(24)

13(24)

22

68 802 x 165 x 262

802 x165 x 262

888 x 170 x 287

(570 x 137 x 568)

(570 x 137 x 568)

1,080 x 181 x 314

870 x 320 x 655 7

Kg

7(9)

9

12

O

O

1/2"(12.7)

1/2"(12.7)

64

g

2,100

Airflow Direction Control(Up & Down)

O

O

Remocon Type Service Valve

13

36

W

mm

Outdoor

9.0(8.5)

54

Indoor

Indoor

2.5

56

Outdoor, Max Input

1.5

1, 220~240, 50

Indoor, High Noise Level (1m)

1.2

L.C.D Wireless Luquid Gas

inch(mm)

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

3/8"(9.52)

Sleeping Operation

O

Connection Cable

O

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

Product Specifications Model Item Cooling Capacitor (Indoor) Cooling Capacitor (Outdoor) Heating Capacitor (Indoor) Heating Capacitor (Outdoor) Moisture Removal Power Supply Air Circulation

Indoor

FMN0760NL/M/N/Q FMN0960NL/M/N/Q FMN1260NL/M/N/Q FMN1860NL/M/N/Q FMN2460NL/M/N/Q (FMN0960NFD/M/B)(FMN1260NFD/M/B)

Outdoor

FMU3060N4L/M/N/Q

Btu/h

7,000

9,000

12,000

18,000

22,900

W

2,051

2,637

3,517

5,274

6,711

Btu/h

7,000 ~ 32,000

W

2,051 ~ 9,378

Btu/h

8,000

10,000

13,800

19,000

2,600

W

2,344

2,930

4,044

5,567

7,620

2.5

2.8

13

16

Btu/h

7,000 ~ 35,000

W

2,051 ~ 10,257

l/h

1.2

1.5

Ø, V, Hz Indoor, Max Outdoor, Max

1, 220-240, 50 CMM

Indoor, High Noise Level (1m)

1.0

Indoor, Med Indoor, Low

dB(A)±1

6.5

7.0(7.5)

9.0(8.5) 60

36

38(39)

40(44)

44

47

33

34(36)

38(41)

41

44

30

32(33)

36(34)

39

41

22

32

Outdoor, Max Input Running Current Motor Output

Dimensions

Net Weight Refrigerant

Cooling Heating Cooling Heating Indoor Outdoor

56

W mm

Outdoor

(W*D*H)

Outdoor R-22

1,060 ~ 3,300 4.4 ~ 18.5

A

Indoor

Indoor

820 ~ 3,600

W

Kg

5.4 ~ 16.5 7.5

7.5(24)

68 802 x 165 x 262

802 x 165 x 262

1,080 x 181 x 314 1,080 x 181 x 314

870 x 320 x 800 7

7(9)

9

12

12

O

O

75 2,350 O

O

O

Remocon Type Service Valve

888 x 170 x 287

(570 x 137 x 568) (570 x 137 x 568)

g

Airflow Direction Control(Up & Down)

13(24)

L.C.D Wireless Luquid Gas

inch(mm)

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

3/8"(9.52)

3/8"(9.52)

1/2"(12.7)

Sleeping Operation

O

Connection Cable

O

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

-7-

1/2"(12.7)

5/8"(15.88)

LGE Internal Use Only

Dimensions 1. Indoor Unit 570

137

D

H 568

W

Pipe Hole

Hanger Hole

Tubing hole cover Installation plate Installation plate

Fix Hole

Left rear piping

Right rear piping

Left rear piping

Right rear piping

Left rear piping

"D"

80mm A

Center

Center

20mm

20mm

A

Right rear piping

"C"

A

A

50mm ø70mm

ø70mm

ø70mm

(7K, 9K)

Hole Center

ø70mm

(12K) MODEL

ø70mm

(18K, 24K)

7K,9K Btu Series

12K Btu Series

18K, 24K Btu Series

DIM W

mm

802

888

1,080

H

mm

262

287

314

D

mm

165

170

181

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

2. Outdoor Unit

L1

H

L3

L2

D

W

L10 L10 L9 L9

L4

L6

MODEL DIM

L5

L7

L8

FMU1860N2L/M/N/Q FMU2160N3L/M/N/Q

FMU3060N4L/M/N/Q

W

mm

870

870

H

mm

655

800

D

mm

320

320

L1

mm

370

370

L2

mm

25

25

L3

mm

630

775

L4

mm

25

25

L5

mm

546

546

L6

mm

160

160

L7

mm

160

160

L8

mm

53

53

L9

mm

50

50

L10

mm

40

40

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

-9-

LGE Internal Use Only

Wiring Diagram

CN-POWER

STEP MOTOR

Z

3

3

CN-GND

FUSE 250V 3.15A

4

CN-D1

CN-DISP1

YL

BL

BR

1(L) 2(N)

STEP MOTOR

STEP MOTOR

STEP MOTOR

Z

CN-POWER

RD

BL

GN/YL

BR

FUSE AC250V/T2A

1(L) 2(N)

CN-TH1

THERMISTOR

CN-UD

YL

SH-CAPA.

CN-TH

BK

CN-LR1

WH BK FAN MOTOR YL RD

REMOTE CONTROL

ZNR BR

MAIN PCB ASSY

AUTO RESTART

CN-MOTOR2

SSR

FORCED OPERATION

CN-U/D

MOTOR

MAIN PCB ASM

CN-FAN

OR

2. Art Cool Type Indoor Unit

CN-LR2

1. Room type Indoor Unit

CN-D2

TO OUTDOOR UNIT

PILLAR TERMINAL

DISPLAY PCB ASM

DISPLAY PCB ASSY

CONNECT PCB ASSY

STEP MOTOR

TO OUTDOOR UNIT

INDOOR WIRING DIAGRAM

STEP MOTOR INDOOR WIRING DIAGRAM

3854A20023B

3854A20219A

3. Outdoor Unit Comp. U V W

RD

U

WH

V

BL

W

IPM

N

WH

P

BK

WH 400V,2500µF(DC LINK) CAPACITOR BK

CNCNGATE1 GATE2

CNIPM WH

BK BK BRIDGE DIODE

4WAY

MOTOR

SUCTION SENSOR

BK

DISCHARGE SENSOR

WH

CN-SV CN-SV(H) CN-4WAY

REACTOR

BL

BL

WH

BR

L/P SWITCH

WH

(WH)

BR

(RD) POWER-IN

GND

BL

BR

GN/YL BL

GN/YL

NOISE FILTER

3 1(L) 2(N)

BL

GN/YL

BL BR

BR

3

BR

YL

BK

3 1(L) 2(N)

YL

BL

(WH)

BR

2 POWER 4 RELAY 0 1

H/P SWITCH

CN-DATA

RD

CT

CN-AC

WH BK YL YL

GN/YL BL

BR

POWER-OUT

NL

WH

S.V

FUSE 250V,25A

WH

D-PIPE SENSOR

RD

BR

CN-PWR

C-PIPE SENSOR

BL

S.V

CN-POWER

RD

RY-START

A-PIPE SENSOR B-PIPE SENSOR

WH

BL BRIDGE DIODE

250V, 3.15A FUSE

BK

RD

BL BK OR RY-LOW

CN-LEV3 CN-LEV2 CN-LEV1 CN-LEV4

COND SENSOR AIR SENSOR

(RD)

CN-TH6

C-LEV

CN-TH5 CN-TH3 CN-TH4 CN-TH2

B-LEV

CAPACITOR (400V,165µF)

RD

CN-DC

MAIN PCB

CN-TH1

A-LEV

BK

WH

BK

RD CN-FAN

OPTION D-LEV

RD

(9PIN)

CNIPM

RY-HIGH

(7PIN)

RYPWR

(8PIN)

CNCNGATE1 GATE2

BR YL

BR

CAPACITOR

YL BR BL BK OR

BK

3

1(L) 2(N)

OPTION

D

C

B

A

MAIN POWER 1Ø, 220~240V, 50Hz

3854AP7050Z

TO INDOOR UNIT

(FMU1860N2L/M/N/Q FMU2160N3L/M/N/Q) Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

(FMU3060N4L/M/N/Q)

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LGE Internal Use Only

Refrigeration Cycle Diagram 1. FMU2160N3L/M/N/Q, FMU1860N2L/M/N/Q Refrigerant flow

Indoor Unit

Outdoor Unit C-gas pipe sensor B-gas pipe sensor A-gas pipe sensor

UNIT-C

UNIT-B

UNIT-A

Gas side Service Valve

4-WAY VALVE

Heating sensor

A-liquid pipe sensor

C-liquid pipe sensor

Indoor temperature sensor

B-liquid pipe sensor

Discharge pipe sensor

Comp

Heat Exchanger

A-LEV B-LEV C-LEV

Strainer

Liquid side Service Valve

2. FM-3060N4L/M/N/Q Indoor Unit

Outdoor Unit D-gas pipe sensor C-gas pipe sensor B-gas pipe sensor A-gas pipe sensor

UNIT-B

UNIT-A

Solenoid Valve Heating sensor

Discharge pipe sensor

A-liquid pipe sensor

UNIT-C

B-liquid pipe sensor

C-liquid pipe sensor

Indoor temperature sensor

D-liquid pipe sensor

UNIT-D

Gas side Service Valve

Section pipe sensor Comp

Heat Exchanger

A-LEV B-LEV C-LEV

Strainer

D-LEV Liquid side Service Valve

ex)

Solenoid valve

Cooling & Deice

LEV

Heating

Capillary tube

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 11 -

LGE Internal Use Only

Operation Details 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

■ Cooling Mode Operation • When the intake air temperature reaches 0.5°C below the setting temp, the compressor and the outdoor fan stop. • When it reaches 0.5°C above the setting temp, they start to operate again. Compressor ON Temp ➲ Setting Temp+0.5°C Compressor OFF Temp ➲ Setting Temp-0.5°C • While in compressor running, operating with the airflow speed set by the remote control. While in compressor not running, operating with the low airflow speed regardless of the setting.

■ 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 ≤ Intake Air Temp ➲ 25°C 24°C ≤ Intake Intake Air Temp<26°C ➲ Intake Air Temp-1°C 18°C ≤ Intake Intake Air Temp<24°C ➲ Intake Air Temp-0.5°C Intake Air Temp<18°C ➲ 18°C • While in compressor off, the indoor fan repeats low airflow speed and pause. • While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification operation and 4-min compressor off repeat. Compressor ON Temp. ➲ Setting Temp+0.5°C Compressor OFF Temp. ➲ Setting Temp-0.5°C • In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.

■ Heating Mode Operation • When the intake air temp reaches +3°…above the setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on. Compressor ON Temp. ➲ Setting Temp. Compressor OFF Temp. ➲ Setting Temp.+3°C • While in compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C, when above 28°C , it operates with the low or setting airflow speed. When the indoor pipe temp is between 20°C and 28°C, it operates with Super-Low(while in sleep mode, with the medium airflow speed).

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 12 -

LGE Internal Use Only

• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C, when above 35°C , it operates with the low airflow speed. • If overloaded while in heating mode operation, in order to prevent the compressor from OLP operation, the outdoor fan is turned on/off according to the indoor pipe temp. • While in defrost control, both of the indoor and outdoor fans are turned off.

■ Defrost Control(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 after 35 minutes 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 12°C even it before 12 minutes. • The second defrost starts only when the outdoor pipe temperature falls below -6°C after 35 minutes passed from ending of the first defrost and more than 4 minutes operation of compressor.

■ Heating overload • Outdoor fan ON/OFF by sensing outdoor pipe temperature. • Outdoor fan is OFF if pipe temperature is over 15°C and outdoor fan is ON if pipe temperature is below 7°C. • Outdoor fan is off if any one part is heating overload condition.

■ 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 ≤ Inatake Air Temp ➲ Fuzzy Operation for Cooling 21°C ≤ Inatake Air Temp<24°C ➲ Fuzzy Operation for Dehumidification Inatake Air Temp<21°C ➲ Fuzzy Operation for Heating • If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10 sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated. 1) Fuzzy Operation for Cooling • According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on. Compressor ON Temp ➲ Setting Temp +0.5°C Compressor OFF Temp ➲ Setting Temp + 0.5°C • At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time. 26°C≤ Intake Air Temp ➲ 25°C 24°C≤ Intake Air Temp<26°C ➲ Intake Air Temp + 1°C 22°C≤ Intake Air Temp<24°C ➲ Intake Air Temp + 0.5°C 18°C≤ Intake Air Temp<22°C ➲ Intake Air Temp Intake Air Temp<18°C ➲ 18°C • When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule. • While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature. Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only

• 2) Fuzzy Operation for Dehumidification • According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on. Compressor ON Temp ➲ Setting Temp + 0.5°C Compressor OFF Temp ➲ Setting Temp+0.5°C • At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time. 26°C ≤ Intake Air Temp ➲ 25°C 24°C ≤ Intake Air Temp<26°C ➲ Intake Air Temp+1°C 22°C ≤ Intake Air Temp<24°C ➲ Intake Air Temp+0.5°C 18°C ≤ Intake Air Temp<22°C ➲ Intake Air Temp Intake Air Temp<18°C ➲ 18°C • When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule. • While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as in dehumidification operation. 3) Fuzzy Operation for Heating • According to the setting temperature selected by Fuzzy rule, when the intake air temp is 3°C or more above the setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on. Compressor ON Temp ➲ Setting Temp Compressor OFF Temp ➲ Setting Temp + 3°C • At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time. 20°C≤Intake Air Temp ➲ Intake Air Temp + 0.5°C Intake Air Temp<20°C ➲ 20°C • When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule. • While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to the intake air temperature and the setting temperature.

■ Airflow Speed Selection • The airflow speed of the indoor fan is set to high, medium, low, or chaos (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. • If the appliance is on pause at the time set by the timer, the pause continues.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 14 -

LGE Internal Use Only

■ 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. After another 30 min elapse, it increases by 1°C again. • When the sleep timer mode is input while in cooling cycle mode, the airflow speed of the indoor fan is set to the low. • When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set to the medium.

■ Chaos Swing Mode • By the Chaos Swing key input, the 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. • 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. • The slide switch on the main unit of the appliance should be on the Auto Restarting position in order that the Auto Restarting operation is available. • Operation Mode that is kept on the memory FORCED - State of Operation ON/OFF OPERATION - Operation Mode/Setting Temp/Selected Airflow Speed AUTO RESTART - Sleep Timer Mode/Remaining Time of Sleep Timer (unit of hour) REMOTE CONTROL

Slide Switch (Room Type Indoor unit)

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 15 -

LGE Internal Use Only

■ 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≤Intake Air Temp ➲ Cooling Mode Operation, 22°C, High Speed 21°C≤Intake Air Temp<24°C ➲ Dehumidification Operation, 23°C, High Speed Intake Air Temp<21°C ➲ Heating Mode Operation, 24°C, High Speed

■ Remote Control Operation Mode • When the remote control is selected by the slide switch on the main unit, the appliance operates according to the input by the remote control.

■ Protection of the evaporator pipe from frosting • If the indoor pipe temp is below 0°C in 7 min. after the compressor operates without any pause while in cooling cycle operation mode, the compressor and the outdoor fan are turned off in order to protect the indoor evaporator pipe from frosting. • When the indoor pipe temp is 7°C or higher after 3 min. pause of the compressor, the compressor and the outdoor fan is turned on according to the condition of the room temperature.

■ Buzzer Sounding Operation • When the appliance-operation key is input by the remote control, the short "beep-beep-" sounds. • When the appliance-pause key is input by the remote control, the long "beep—" sounds.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 16 -

LGE Internal Use Only

Display Function Operation Indicator • Cooling, Soft Dry, Fan, Heating Sleep Timer Indicator • Sleep Mode Timer Indicator • Timer Mode Defrot Indicator • Hot-start, Defrost

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. Error Code

1

Error LED (Indoor body operation LED) (once) 3sec

3sec

3sec

• Indoor temperature thermistor open/short. • Indoor pipe temperature thermistor open/short.

SVC check point • Indoor TH ass'y check

• Outdoor temperature thermistor open/short. • Outdoor TH ass'y check • Outdoor pipe temperature thermistor open/short.

(twice)

2 3sec

Error contents

3sec (5times)

5

• Poor communication

• Communication line/circuit

• CT / Current error

• Main PCB CT check • Wiring and PWM cable check

• DC Peak

• Excessive amount of refrigerant • Blocking condenser

• DC low voltage

• Outdoor wiring check

• High pressure/Instantaneous power failure

• Pressure check • Main power check

• Overload combination

• Indoor unit combination check

• Discharge pipe temperature overheating

• Refrigerant leakage • Check refrigeration cycle

3sec (8times)

8

3sec (9times)

9 3sec (10times)

10 3sec (11times)

11 3sec (1times)

(3times)

3sec

3sec

13 14

3sec

(1times)

(4times)

3sec

3sec

3sec

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 17 -

LGE Internal Use Only

Installation (1) Installation of Indoor, Outdoor unit 1. Selection of the best location

Front

(1) Indoor unit

Left

1. Room Type Indoor Unit • There should not be any heat source or steam near the

Rear left

unit. • There should not be any obstacles to prevent the air circulation. • A place where air circulation in the room will be good. • A place where drainage can be easily obtained. • A place where noise prevention is taken into consideration. • Do not install the unit near the door way. • Ensure the spaces indicated by arrows from the wall, ceiling, fence, or other obstacles.

Down right Right

Rear right

More than 5 cm More than 5 cm More than 5 cm More than eye-level

2. Art Cool Type Indoor Unit • Do not have any heat or steam near the unit. • Select a place where there are no obstacles in front of the unit. • Make sure that condensation drainage can be conveniently routed away. Do not install near a doorway. • Ensure that the space around the left and right of the unit is more than 50cm. The unit should be installed as high on the wall as possible, allowing a minimum of 10cm from ceiling. • Use a stud finder to locate studs to prevent unnecessary damage to the wall.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

More than 10cm More than 50cm

- 18 -

More than 50cm

More than 2m

LGE Internal Use Only

2) Room Type Indoor Unit Installation The mounting wall should be strong and solid enough to protect it from the vibration.

Installation Plate

1. Mount the installation plate on the wall with four Type "A" screws. (If mounting the unit on the concrete wall, consider using anchor bolts.) • Always mount the Installation plate horizontally by aligning the marking-off line by means of the thread and a level.

marking-off line

Type "A" screw

Thread Weight

2. Drill the piping hole with 70mm dia. holecore drill. • Line according to the arrows marked on lower the left and the rght side of the Installation Plate. The meeting point of the extended line is the center of the hole. • Drill the piping hole at either the right or the left and the hole should be slightly slant to the outdoor side.

The lower left and the right side of Installation Plate 7K, 9K Btu Left rear piping

Right rear piping

20mm

20mm

80mm

50mm ø70mm

ø70mm

12K Btu Left rear piping

Right rear piping A

A

A

A

ø70mm

ø70mm

18K, 24K Btu Left rear piping

"D"

Right rear piping

"C"

Hole Center

ø70mm

Wall Outdoor

5~7mm

Indoor

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 19 -

LGE Internal Use Only

2. Cover pipe and cover side remove • Remove two screws(for fixing cover pipe) • Pull up the cover side of desired connecting direction, then cover side is separated. • In case connecting direction is left or right, path through the hole of cover side.

3) Art Cool Type Indoor Unit The wall you select should be strong and solid enough to prevent vibration 1. Open panel front • First,Pull the grille bottom, then remove screws (2 pieces), and close grille bottom again. • The moment of lifting the both lower parts of panel front, you can hear sound this panel came out, In this time panel front is separated • After pull down this panel a bit, and separate connecting wire with product.

CAUTION

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

Pipe hole

NOTE: When connecting pipe path through rear wall, don’t remove the hole. 3. Drain hose junction • Remove the rubber stopple of desired drain direction. • As the following picture, Insert drain hose in the handle of drain pan, and join drain hose and connecting hose.

Panel Front Connector

Adhesive

Only one desiring direction

Connecting part Drain hose

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 20 -

rubber cap

LGE Internal Use Only

■ Sticking the installation guide map and fixing Indoor unit 1. Put an Installation Guide Map on the desired surface.

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

INSTALLATION GUIDE MAP

Refer to No. 5 on this page when making a hole in the wall.

2. Make a hole with diameter of 6mm and depth of 30-35mm when piercing a screw point. IN ST AII AT IO N

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

GU ID EM AP

mm

10

IN ST AL LA TIO N

3. Drive the fore plastic anchors into drilled points. IN ST AL LA TIO N

GU ID EM AP

GU

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

Plastic anchors

4. Hang the hole of product at the upper screws. (In this time, Remove the map)

In case of nothing wrong in the matter, connect the pipe and the wire. (Installation manual reference)

INS TAL LAT ION GUID EM AP

(Falling attention)

Hanger hole (Rear side of product)

5. Check the fixed product with light power.

■ Preparing work for installation 1. Drill a hole in the wall • Drill the piping hole with a ø50mm hole core drill. Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side. WALL Indoor

Outdoor

IN ST AL LA TIO N

GU ID EM AP

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 21 -

(0.2~0.3")

Horizontality

5-7mm

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

LGE Internal Use Only

(2) Piping and Drainage of Indoor Unit 1) Preparation of pipings

Pipe cutter

1. Cut the pipes and the cable. • Use the accessory piping kit or the pipes purchased locally. • Measure the distance between the indoor and the outdoor unit. • Cut the pipes a little longer than the measured distance. • Cut the cable 1.5m longer than the length of the pipe.

Slanted

90

Rough

Pipe 2. Remove burrs. • Remove burrs from cut edges of pipes. • Turn the pipe end toward down to avoid the metal powder entering the pipe.

3. Flaring the pipes. • Insert the flare nuts, mounted on the connection ports of both indoor and outdoor unit, onto the copper pipes. Some refrgerant gas may leak, when the flare nuts are removed from the indoor unit, as some gas is charged to prevent the inside of the pipe from rusting. • Fit the copper pipe end into the Bar of flare tool about 0~0.5mm higher. (See illustration) • Flare the pipe ends.

Point down

"A": ø15.88 mm (5/8") → 0~1.0 mm ø12.7 mm (1/2") → 0~0.5 mm ø9.52 mm (3/8") → 0~0.5 mm ø6.35 mm (1/4") → 0~0.5 mm

Handle

Bar Bar

Copper pipe

Yoke

"A"

Caution: If burrs are not removed, they may cause a gas leakage.

Reamer

Cone

Clamp handle

Red arrow mark

= Improper flaring =

4. Tape the flaring portion to protect it from the dust or damages.

Inclined

Surface damaged

Cracked

Uneven thickness

When properly flared, the internal surface flare will evenly shine and be of even thickness. Since the flare part comes into contact with the connectors, carefully check the flare finish.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 22 -

LGE Internal Use Only

2) Connection of Pipings ■ Room Type Indoor unit

Installation plate

1. Remove the installation plate • Pull the two '∆' marked portion of bottom of the chassis and pull the installation plate out of chassis.

Pull

Pull

2. Route the drain hose and the indoor tubing.

For left rear piping Left rear

3. Route the tubing and the drain hose straight backwards(see figure). 4. Insert the connecting cable into the indoor 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.

Tubing holder • To remove the holder, press the bottom of the chassis near the holder upwards and the tab is clear of its hole. • Turn it clockwise approx. 90° and remove it.

Pull Press

5. Tape the tubing, drain hose and the connecting cable. Be sure that drain hose locates at the lowest side of the bundle. Locating at the upper side can be a reason that drain water overflows drain pan inside the unit.

Gas side piping Connecting cable

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 23 -

Liquid side piping Drain hose

LGE Internal Use Only

6. Indoor unit installation. • Hook the indoor unit onto the upper position 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 the hooks are properly seated on the installation plate by moving it in left and right.

Connecting cable

Drain hose Press the lower left and right side of the unit against the Installation Plate until the hooks engage with their slots (sound click).

7. Connecting the pipings to the indoor unit. • Align the center of the pipings and sufficiently tighten the flare nut with fingers. • Finally, tighten the flare nut with torque wrench until the wrench clicks. Wrench tightening the flare nut with forque wrench, ensure the direction for tightening follows the arrows on the wrench. Pipe Size Liquid Side (1/4") Gas Side (3/8") Gas Side (1/2") Gas Side (5/8")

Torque 1.8kg • m 4.2kg • m 5.5kg • m 6.6kg • m

Indoor unit tubing

Flare nut

Pipings

Spanner Torque wrench

8. Wrap the insulation material around the connecting portion.

Plastic bands

CAUTION: Take care to arrange the pipings, drain hose and cables as the right upper picture for inserting it into the indoor unit and refixing the tubing holder easily.

Insulation material

Wrap the insulation material around the connecting portion.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 24 -

LGE Internal Use Only

9. Set the pipings and the connecting cable to the back of the chassis with the tubing holder. • Hook the edge of tubing holder to tap on chassis and push the bottom of tubing holder to be engaged in the bottom of chassis.

Drain hose Taping Piping

Tubing holder

1 Hook

2 Push

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

Connecting cable

Drain hose

Press the lower left and right side of the unit against the Installation Plate until the hooks engages with their slots (sound click).

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 25 -

LGE Internal Use Only

■ Art Cool Type Indoor unit • Preparing the indoor unit's piping and drain hose for installation through the wall. 1. Route the indoor tubing and the drain hose in the direction of rear left or right. 2. Tape the tubing, drain hose, and the connecting cable. Be sure that the drain hose is located at the lowest side of the bundle. Locating at the upper side can cause drain pan to overflow inside the unit.

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

Drain pipe

Indoor unit drain hose Adhesive

4. Wrap the insulation material around the connecting portion. • Overlap the connection pipe insulation material and the indoor unit pipe insulation material. Bind them together with vinyl tape so that there is no gap. Plastic bands Insulation material

Loop

Connecting cable

Vinyl tape(narrow)

Gas side piping

Liquid side piping Drain hose

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

3. Connecting the pipings to the indoor unit and drain hose to drain pipe. • Align the center of the pipes and sufficiently tighten the flare nut by hand.

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

Connection pipe Vinyl tape (wide)

Wrap with vinyl tape

Connecting cable

Pipe Vinyl tape(narrow)

Indoor unit tubing

Flare nut

Pipes

• 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.

• Tighten the flare nut with a wrench.

Wrap with vinyl tape Open-end wrench (fixed)

Pipe Flare nut Wrench

Connection pipe

Vinyl tape(wide) Drain hose

Indoor unit tubing

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 26 -

LGE Internal Use Only

■ Panel Front Assembly 1. First, Check the side cover assembly exactly, Fix power cord in the bottom groove of cover side left.

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

Panel Front Connector

3. Drive two screws.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 27 -

LGE Internal Use Only

(3) Connecting Pipings and the cable to Outdoor unit 1) Connecting the pipings to the Outdoor unit 1. When piping installation work you must be used the connector. Indoor Units

Gas A

12K 18K 24K

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

Liquid B

A

B

Ø9.52→Ø12.7

Not necessary

Ø9.52→Ø15.88

Ø6.35→Ø9.52 Connector

A

3. 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.

B

*Connecting pipe size Indoor Units 7K 9K 12K 18K 24K

Outdoor unit

Gas side Ø9.52(3/8) Ø9.52(3/8) Ø12.7(1/2) Ø12.7(1/2) Ø15.88(5/8)

Connector

Liquid side Ø6.35(1/4) Ø6.35(1/4) Ø6.35(1/4) Ø6.35(1/4) Ø9.52(3/8)

Liquid side piping C-UNIT

B-UNIT

A-UNIT

Torque wrench

Gas side piping

CAUTION After the confirmation of the above conditions, prepare the wiring as follows: 1) Never fail to have an individual power specialized for the air conditioner. As for the method of wiring, be guided by the circuit diagram pasted on the inside of control box cover. 2) The means for disconnection from a power supply shall be incorporated in the fixed wiring and have an air gap contact separation of at least 3mm in each active(phase) conductors. 3) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations to which the unit is subjected during the course of transportation. Check them and make sure that they are all tightly fastened. (If they are loose, it could give rise to burn-out of the wires.) 4) Specification of power source. 5) Confirm that electrical capacity is sufficient. 6) See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate. 7) Confirm that the cable thickness is as specified in the power sources specification. (Particularly note the relation between cable length and thickness.) 8) Never fail to equip a leakage breaker where it is wet or moist. 9) The following troubles would be caused by voltage drop-down. • Vibration of a magnetic switch, damage on the contact point there of, fuse breaking, disturbance to the normal function of a overload protection device. • Proper starting power is not given to the compressor.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 28 -

LGE Internal Use Only

2) Connection of the cable

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. 1(L) 2(N)

3

3

Over 5mm Holder for power supply cord

OUTDOOR UNIT

Terminal on the OUTDOOR UNIT 3

Terminal block

1(L) 2(N)

1(L) 2(N)

3

Power cord

Cover control Connecting cable Power cord

1(L) 2(N)

3

1(L) 2(N)

3

1(L) 2(N)

3

1(L) 2(N)

3

Terminal on the INDOOR UNIT Terminal on the INDOOR UNIT Terminal on the INDOOR UNIT Terminal on the INDOOR UNIT D-UNIT

C-UNIT

B-UNIT

A-UNIT

OUTDOOR UNIT

Terminal on the OUTDOOR UNIT 3

1(L) 2(N)

3

3

1(L) 2(N)

3

1(L) 2(N)

Power cord

1(L) 2(N)

3

1(L) 2(N)

3

1(L) 2(N)

Terminal on the INDOOR UNIT

Terminal on the INDOOR UNIT

C-UNIT

B-UNIT

A-UNIT OUTDOOR UNIT

Terminal on the OUTDOOR UNIT 3

1(L) 2(N)

3

3

3

Terminal on the INDOOR UNIT

2. Secure the cable onto the control board with the holder (clamper). 3. Refix the cover control to the original position with the screw. 4. Use a recongnized circuit breaker between the power source and the unit. A disconnection device to adequately disconnect all supply lines must be fitted.

1(L) 2(N)

3

1(L) 2(N)

Power cord

1(L) 2(N)

3

1(L) 2(N)

3

Terminal on the INDOOR UNIT

Terminal on the INDOOR UNIT

B-UNIT

A-UNIT

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

Air Conditioner

Main power source

Air Conditioner

Circuit Breaker Use a 20A circuit breaker or time delay fuse. (21K)

GN

NORMAL CROSSSECTIONAL AREA 3.5mm2

/YL 20

GN

mm

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

The connecting cable connected to the indoor and outdoor unit should be complied with the following specifications (Rubber insulation, type H07RN-F approved by HAR or SAA). ø7.5mm

ø8.5mm

CAUTION The power cord connected to the outdoor unit should be complied with the following specifications (Rubber insulation, type H05RN-F approved by HAR or SAA).

Circuit Breaker Use a 25A circuit breaker or time delay fuse. (30K)

NORMAL CROSSSECTIONAL AREA 0.75mm2

/YL 20

- 29 -

mm

LGE Internal Use Only

(4) Checking the Drainage and Pipe forming 1) Room Type Indoor Unit 1. Remove the Grille from the cabinet • Set the up-and-down air direction louver to open position(horizontally) by finger pressure. • Remove the securing screws. • To remove the Grille, pull lower the left and right side of the grille toward you (slightly tilted) and lift it straight upward.

Screw Pull the right and the left side.

2. Check the drainage • Pour a glass of water on the evaporator. • Ensure if water flows drain hose of indoor unit without any leakage.

2) Art Cool Type Indoor Unit • Pour a glass of water on the evaporator. • Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 30 -

LGE Internal Use Only

3) 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. OUTDOOR UNIT

Terminal on the OUTDOOR UNIT 3

3

1(L) 2(N)

3

1(L) 2(N)

3

1(L) 2(N)

Power cord

Connecting cable

1(L) 2(N)

3

1(L) 2(N)

3

1(L) 2(N)

3

1(L) 2(N)

3

Terminal on the INDOOR UNIT Terminal on the INDOOR UNIT Terminal on the INDOOR UNIT Terminal on the INDOOR UNIT D-UNIT

C-UNIT

B-UNIT

A-UNIT

OUTDOOR UNIT

Terminal on the OUTDOOR UNIT 3

1(L) 2(N)

3

3

1(L) 2(N)

3

1(L) 2(N)

Power cord

1(L) 2(N)

3

1(L) 2(N)

3

1(L) 2(N)

3

Terminal on the INDOOR UNIT

Terminal on the INDOOR UNIT

Terminal on the INDOOR UNIT

C-UNIT

B-UNIT

A-UNIT OUTDOOR UNIT

Terminal on the OUTDOOR UNIT 3

1(L) 2(N)

3

3

1(L) 2(N)

3

1(L) 2(N)

Power cord

1(L) 2(N)

3

1(L) 2(N)

3

Terminal on the INDOOR UNIT

Terminal on the INDOOR UNIT

B-UNIT

A-UNIT

2. Attach the Grille onto the cabinet. • Grasp lower the 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.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 31 -

LGE Internal Use Only

4) Form the pipings 1. Wrap the connecting portion of indoor unit with the Insulation material and secure it with two Plastic Bands(for the left pipings). • If you want to connect an additional drain hose, the end of the drain-outlet should keep distance from the ground.(Do not dip it into water, and fix it on the wall to avoid swinging in the wind.)

Taping Drain hose

In case of the Outdoor unit is installed bellow position of the Indoor unit.

Plastic band

Pipings Connecting cable

2. Tape the Pipings, drain hose and Connecting Cable from down to up. Power supply cord

3. Form the pipings gathered by taping along the exterior wall and fix it onto the wall by saddle or equivalent. • Trap is required to prevent water from entering into electrical parts.

In case of the Outdoor unit is installed upper position of the Indoor unit. Seal a small opening around the pipings with gum type sealer. Trap

1. Tape the Pipings and Connectiong cable from down to up. 2. Form the pipings gathered by taping along the exterior wall and the Trap to be required to prevent the room from entering the water. 3. Fix the pipings onto the wall by saddle or equivalent.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 32 -

LGE Internal Use Only

(5) Air Purging of the Pipings and indoor unit The air which contains moisture remaining in the is refrigeration cycle may cause a malfunction on the compressor. 1. Confirm that both the liquid side valve and the gas side valve are set to the closed position. 2. After connecting the piping, check the joints for gas leakage with gas leak detector. 3. Remove the service port nut, and connect the gauge manifold and the vacuum pump to the service port by the charge hose. 4. Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below-76cmHg. 5. Disconnect the charge hose and fit the nut to the service port. (Tightening torque: 1.8kg.m) 6. Remove the valve stem nuts, and fully open the stems of the Liquid and Gas side service valves with a hexagon wrench. 7. Tighten the valve stem nuts of the Liquid and Gas side service valve.

Liquid side

Indoor unit

Outdoor unit 3-way valve

Gas side

Closed

3-way valve Vacuum pump Closed OPEN

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

OPEN

- 33 -

LGE Internal Use Only

(6) Maximum Length of Pipe and Freon Extra Charge Charge amount per 1m CONNECTION TYPE

Capacity (Btu/h)

STANDARD LENGTH(m)

A

B

C

D

Charge am't(g) per 1m

~7000

7.5

7

15

7

15

20

~9000

7.5

7

15

7

15

20

~12000

7.5

7

15

7

15

20

~24000

7.5

7

15

7

15

30

B(Length) INDOOR UNIT A(Height) OUTDOOR UNIT C(Height) INDOOR UNIT D(Length)

** A, B mean indoor unit higher located than outdoor unit. C, D mean outdoor unit higher located than indoor unit.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 34 -

LGE Internal Use Only

(7) Test Running 1. Check that all tubing and wiring have been properly connected. 2. Check that the gas and liquid side service valves are fully open.

Bolt

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.

Tubing connection

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 (Cooling) or reversely (Heating).

NOTE:

Intake temperature

• 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.

Discharge air

2) Precautions in test run ■ 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 forced operation is started by pressing button for 2 seconds. (Cassette Type) The test run is started by pressing button for 5 seconds. (Cassette Type) The test run is started by pressing timer cancel button five times continuously. (Room type) ■ To cancel the test run, press any button.

3) Settlement of outdoor unit

Discharge temperature

Intake temperature Discharge air

Discharge temperature

■ 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.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 35 -

LGE Internal Use Only

Operation (1) Name and Function-Remote Control (Door Closed) Remote Control Signal transmitter Transmits the signals to the room air conditioner.

Signal transmitter

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 5

6

4

1

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, or CHAOS.

3

5

JET COOL Used to start or stop the speed cooling. (Speed cooling operates super high fan speed in cooling mode.)

Flip-up door (closed)

2

6

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

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 36 -

LGE Internal Use Only

(2) Name and Function-Remote Control (Door Opened)

Remote Control Signal transmitter Transmits the signals to the room air conditioner.

Signal transmitter

1

ON/OFF TIMER BUTTONS Used to set the time of starting and stopping operation.

2

TIME SETTING BUTTONS Used to adjust the time.

3

TIMER SET/CANCEL BUTTONS Used to set the timer when the desired time is obtained and to cancel the Timer operation.

4

SLEEP MODE AUTO BUTTON Used to set Sleep Mode Auto operation.

ON

OFF

1

4

2

5 SET

3

5

AIR CIRCULATION BUTTON Used to circulate the room air without cooling or heating (turns indoor fan on/off).

CANCEL

6 7

6

ROOM TEMPERATURE CHECKING BUTTON Used to check the room temperature.

7

RESET BUTTON Used prior to resetting time or after replacing batteries.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 37 -

LGE Internal Use Only

Disassembly of the parts (Indoor unit) (1) Room Type Indoor unit Warning : 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.

Screw

1. To remove the sensor, housing connect, earth conductor & step motor conductor with sensor holder, Motor, Evaporator & P.C.B.

Motor Conductor

Earth Conductor

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 38 -

Power Conductor Sensor Conductor Step Motor Conductor

LGE Internal Use Only

2. To remove the Control Box. • Remove securing screws. • Pull the control box out from the chassis carefully.

3. To remove the Discharge Grille. • Pull the discharge grille out from the chassis carefully.

4. To remove the Evaporator. • Remove screws securing the evaporator and the holder eva.

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

5. To remove the 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.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 39 -

LGE Internal Use Only

(2) Art Cool Type Indoor Unit Warning : Disconnect the unit from power supply before making any checks. Be sure the power switch is set to “OFF”.

1. To remove the Grille from the Chassis. - Pull the grille bottom, the remove 2 securing screws. - Lift the both lower parts of panel front. - After pull down this panel a bit, separate connecting wire with product. Panel Front Connector

2. To remove the Control Box. - Before removing the control box, be sure to disconnect the wires from PWB. - Pull the cover control out from the control box and disconnect other wires. - Remove securing screws. - Pull the control box out from the chassis carefully.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

Step Motor Connectors Sensor Connector

- 40 -

LGE Internal Use Only

3. To remove the Evaporator. - Remove 4 screws securing the evaporator. - Pull the evaporator out from the chassis carefully.

4. Before removing the Turbo Fan. - Remove the securing screws from the chassis. - Pull the pipe cover, top cover and the air guide.

Air Guide

Top Cover

Pipe Cover

5. To remove the Motor. - Remove the securing bolt from the motor shaft. - Pull the fan out from the motor shaft. - Remove 4 screws securing motor mount from the chassis and lift up the motor mount and the bracket.

Bracket

Turbo Fan

Bolt

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 41 -

Motor Mount

LGE Internal Use Only

Valve Service (3-way) 3-way Valve (Liguid Side)

3-way Valve (Gas Side)

Valve cap

Valve cap

Open position Closed position

Open position Closed position

Pin

Pin To piping connection

Service Service port cap port

To outdoor unit

1.

To piping connection

Service Service port cap port

To outdoor unit

Works

Shaft position

Service port

Shaft position

Service port

Shipping

Closed (with valve cap)

Closed (with cap)

Closed (with valve cap)

Closed (with cap)

Closed (clockwise)

Open (push-pin or with vacuum pump) Closed (with cap)

Air purging (Installation)

Open Open (counter-clockwise) (push-pin or with vacuum pump)

Operation

Open (with valve cap)

Closed (with cap)

Open (with valve cap)

Pumping down (Transfering)

Closed (clockwise)

Closed (with cap)

Open (counter-clockwise)

Open (connected manifold gauge)

Evacuation (Servicing)

Open

Open (connected manifold gauge)

Open

3.

Open (connected manifold gauge)

Gas charging (Servicing)

Open

Closed (with cap)

Open

4.

Open

Open (connected manifold gauge)

Open

5.

Pressure check (Servicing)

Open (connected manifold gauge)

Gas releasing (Servicing)

Open

Open (connected manifold gauge)

Open

6.

Open (connected manifold gauge)

2.

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- 42 -

Open (with charging cylinder)

LGE Internal Use Only

(1) Pumping down

Indoor unit

Liquid side Outdoor unit 3-way valve

Gas side

Closed

3-way valve

manifold gauge

Low-handle (CLOSE)

Hi- handle (CLOSE)

Open

• Procedure 6. Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg/cm g.

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.

2

7. Immediately set the gas side valve to the closed position. - Do this quickly so that the gauge ends up indicating 1kg/ g.

- 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.

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.(4.2kg.m/5.5kg.m) - Be sure to check for gas leakage.

4. Air purging of the charge hose. - Open the Low-handle valve on the gauge slightly to air purge from the hose. 5. Set the liquid side valve to the closed position.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 43 -

LGE Internal Use Only

(2) Evacuation (All amount of refrigerant leaked)

Liquid side

Indoor unit

Outdoor unit 3-way valve

Gas side

Open

3-way valve

manifold gauge Vacuum pump

Lowhandle (OPEN)

Hi- handle (OPEN)

Open

• 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).

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.

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).

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 44 -

LGE Internal Use Only

(3) Gas Charging (After Evacuation) Liquid side

Indoor unit

Outdoor unit 3-way valve

Gas side

Charging cylinder

Closed

3-way valve

manifold gauge

Lowhandle Check valve (OPEN)

Hi- handle (CLOSE)

Open

• 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.

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.

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.

- Stopping partway will allow the gas to be discharged. - If the system has been charged with liquid refrigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose.

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).

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.

4. Immediately disconnect the charge hose from the gas side valve's service port.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 45 -

LGE Internal Use Only

Cycle Troubleshooting Guide Trouble analysis 1. Check temperature difference between intake and discharge air and operating current. Temp. difference Current

: approx. 0°C : less than 80% of rated current

All amount of refrigerant leaked out. Check refrigeration cycle.

Temp. difference Current

: approx. 8°C : less than 80% of rated current

Refrigerant leakage Clog of refrigeration cycle Defective compressor

Temp. difference Current

: less than 8°C : near the rated current

Temp. difference

: over 8°C

Temp. Difference

Operating Current Excessive amount of refrigerant

Normal

Notice: Temperature difference between intake and discharge air depends on room air humidity. When the room air humidity is relativery higher, temperature difference is smaller. When the room air humidity is relatively lower temperature difference is larger. 2. Check temperature and pressure of refrigeration cycle. Suction pressure (Compared with the normal value)

Temperature (Compared with the normal value)

Cause of Trouble

Description

High

Defective compressor

Current is low.

Normal

Excessive amount of refrigerant

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

Insufficient amount of refrigerant(Leakage) Clogging

Current is low.

Higher

Lower

Higher

Notice: 1. The suction pressure is usually 4.5~6.0 kg/cm G at normal condition. 2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty. 2

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 46 -

LGE Internal Use Only

Electronic Parts Troubleshooting Guide ❇ Refer to electronic contorol device drawing & schematic diagram.

Trouble 1

The Product doesn’t operate at all.

Turn off the main power and wait to 5 seconds

Turn on the main power again.

Does "Beeping" sound is made from the indoor unit? NO

YES

Check the voltage of power(AC220V/AC240V, 50Hz). • 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.)

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

• Check CN-DISP1

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

Procedure

Remedy

1) The input voltage of power transformer.

1) AC230V ± 30V : Check the rated voltage

1) Replace power transfomer.

2) The output voltage of power transformer.

2) 14V ± 3V

2) Replace power transfomer.

3) IC01D(7812)

3) DC12V

3) Replace IC01D.

4) IC02D(7805)

4) DC5V

4) Replace IC02D.

5) IC01A(KIA7036)

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

5) Replace IC01A.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 47 -

LGE Internal Use Only

Trouble 2

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

Caused by the remote controller.

Caused by other parts except the remote controller

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

Check the contact of CN-DISP 1 connector

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 DISP PWB Ass'y -Voltage between CN1 ➀ - ➆ : DC +5V

Check the Display PWB Ass'y

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

• Check receiver ass'y

- 48 -

LGE Internal Use Only

Trouble 3

The Compressor/Outdoor Fan are unable to drive.

Turn on the main power.

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.

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

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. • Check the related circuit of R02H(12.1K), R01H(1K), R04H(6.2K), R03H(1K), C01H(102), C02H(102), Micom(pin No. , ). • 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 AC220V / 240V). • Check the related circuit of relay in Outdoor PCB Ass'y. Check Point

Comp. ON

Comp. OFF

Between Micom(No. 19) and GND

DC 5V

DC 0V

Between IC01M(No. 10) and GND

DC 1V↓

DC 12V

Turn off main power.

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

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 49 -

LGE Internal Use Only

Trouble 4

When indoor Fan does not operate. Turn off main power.

Check the connection of CN-FAN.

Check the Fan Motor.

Check the Fuse(AC250V, T2A).

Check the related circuit of indoor Fan Motor. • The pin No. 38 of micom and the part for driving SSR.(Q01M) • Check the related pattern. • Check the SSR. - SSR Open: Indoor Fan Motor never operate. - SSR short: Indoor Fan Motor always operates in case of ON or OFF.

Turn on the main power

Check the SSR high speed operation by remote control. (the Indoor Fan Motor is connected) The voltage of Pin No 1(orange) and 3(black) of CN-FAN.

About AC 160V over

About AC 50V over

SSR is not damaged

Check SSR

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 50 -

LGE Internal Use Only

Trouble 5

When the vertical louver does not operate.

• Confirm that the vertical louver is normally geared with the shaft of Stepping Motor. • If the regular torque is detected when rotating the vertical louver with hands ⇒ Normal

• Check the connecting condition of CN-U/D Connector • Check the soldering condition(on PCB) of CN-U/D Connector

Check the operating circuit of the vertical louver • Confirm that there is DC +12V between pin ➀ of CN-U/D and GND. • Confirm that there is a soldering short at following terminals. - Between 17 , 18 , 19 and 20 of MICOM - Between 1 , 2 , 3 and 4 of MICOM - Between 4 , 5 , 6 and 7 of IC01M - Between 5 , 6 , 7 and 8 of IC01M

If there are no problems after above checks. • Confirm the assembly condition that are catching and interfering parts in the link of the vertical louver

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 51 -

LGE Internal Use Only

Trouble 6

The Outdoor Unit does not operate at all. YES

Does the Operating LED of indoor unit blink when Operation's ON?

Refer to the self-diagnosis function.

NO NO Is the Connection between CN-Power of indoor unit and terminal block?

Check the connecting state of connector

YES NO Is the connection of cable between indoor and outdoor unit right?

YES

Indoor

Outdoor

1(Brown) 2(Blue) 3(Green/YL) 4(Red)

1(Brown) 2(Blue) 3(Green/YL) 4(Red)

NO Check the Fuse of Outdoor PCB Ass'y. Check the connecting state of wires.

Is the voltage of CN-POWER , in outdoor PCB Ass'y about AC220V / 240V ? YES NO Is the operation of outdoor Ass'y right? (IC04D, IC01A)

Replace the parts.

NO

Replace the PCB Ass'y.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 52 -

LGE Internal Use Only

Trouble 7-1

When compressor does not operate normally.

■ Communication error between Indoor and Outdoor (Error Code

)

NO Does the operating LED in display PCB Ass'y blink 5 times?

• Check the state of connecting cable (4 line) bewteen indoor and outdoor unit .

YES NO • Electrical wiring diagram(Colors) • Check the connecting state of connectors in outdoor PCB Ass'y (CN_Data - Terminal Block.)

Is the connecting state of connector outdoor PCB Ass'y right. YES NO Is the connection of CN-DATA between indoor and outdoor unit right?

• Reconnect the cable to terminal block. • Check the PCB pattern(Resoldering).

YES

Replace the PCB Ass'y. • Main PCB Ass'y (Indoor/Outdoor)

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 53 -

LGE Internal Use Only

Trouble 7-2

When compressor does not operate normally.

■ CT Error (Error Code

) NO • Check the state of connecting cable (3 line) bewteen Indoor and Outdoor Unit . • Check fuse, Noise Filter, PTC, etc.

Does the operating LED in Display PCB Ass'y blink 8 times? YES NO Is the current transformer(CT) in Main PCB Ass'y right?

Check the PCB pattern(resoldering)

YES NO Is the connecting state of connectors right? (CN-IPM, U.V.W and Compressor wires)

Check the state of connecting wires.

YES NO Is the indoor/outdoor fan locked?

Check the indoor/outdoor fan motor.

YES NO Is the discharge temperature of Indoor unit right(11°C~17°C) in the cooling mode?

Check the compressor.

YES NO Supply the refrigerant

Is the refrigerant pressure right? YES

Replace the PCB Ass'y. • Main PCB Ass'y(Outdoor) • Control Box Ass'y(Outdoor)

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 54 -

LGE Internal Use Only

Trouble 7-3

When compressor does not operate normally.

■ DC Peak Error(Error Code

)

Does the operating LED in display PCB Ass'y blink 9 times? YES NO Is the connecting state of connectors in outdoor Sub. PCB Ass'y right? (CN-UVW, CN-IPM, CN-Gate 1, CN-Gate 2)

• Electrical wiring diagram (Colors) • Check the connecting state of connectors in PCB Ass'y(Main/Sub) • If CN-UWV is connected, the comprressor can be operated a opposite direction.

YES NO

• Check the short P-N P-U, V, W, and N-U, V, W of IPM and then collector, emiter of IGBT • Replace the Sub PCB Ass'y.

Is the power module in Sub PCB Ass'y right? YES NO Is the voltage of CN-AC over than AC170V?

Check the supplied voltage.

YES NO Is the voltage of CN-DC over than about DC260V?

• Check CN-IPM connector(Pin No. 12) • Replace the Sub PCB Ass'y.

YES

Replace the PCB Ass'y. • Main PCB Ass'y • Sub PCB Ass'y • Control Box Ass'y

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 55 -

LGE Internal Use Only

Trouble 7-4

When compressor does not operate normally.

■ DC Low Voltage Error (Error Code

)

Does the operating LED in display PCB Ass'y blinks 10 times? YES NO Is the connecting state of connectors in outdoor PCB Ass'y right? (CN-DC, CN-AC)

Reconnect the connector.

YES NO Check the wiring state.

Is the voltage of capacitor over 187Vdc? YES NO Is the connecting state of wires in outdoor unit?

Check the electrical wiring diagram (Colors)

YES

Replace the PCB Ass'y. • Main PCB Ass'y (Outdoor)

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 56 -

LGE Internal Use Only

Trouble 7-5

When compressor does not operate normally.

■ High press Error (Error Code

)

Does the operating LED in display PCB Ass'y blink 11 times? YES NO Is the installation condition of outdoor unit right.

Check the installation condition.

YES NO Check the indoor/outdoor fan motor.

Is the indoor/outdoor fan locked? YES NO

Remove or supply the refrigerant.

Is the refrigerant pressure right? YES

Replace the PCB Ass'y. • Main PCB Ass'y (Outdoor)

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 57 -

LGE Internal Use Only

■ The problem of missing the connector (INDOOR MAIN PCB ASSY) Connectors

Condition

CN-POWER (1,2)

OPEN

• Malfunctions all indoor & outdoor unit. • Malfunctions remocon, force, test operation mode.

CN-POWER (3)

OPEN

• Malfunctions outdoor unit. • Stop compressor and outdoor fan motor. • The operation LED blinks 5 times. • Communicaion error.

CN-FAN

OPEN

• Malfunctions indoor fan motor.

CN-DISP1

OPEN

• Malfunctions remote controller. • Don't operate the power display module.

CN-TH

OPEN/SHORT

CN-U/D

OPEN

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

Problem (error mode)

• The operation LED blinks once. • Enable to receive remote singnal. • Malfunctions UP/DOWN step motor. • Don't operate louver.

- 58 -

LGE Internal Use Only

■ The problem of missing the connector (OUTDOOR MAIN PCB ASSY) Connectors

Condition

Problem (error mode)

CN-POWER

OPEN

• Malfunctions outdoor unit. • Stop compressor and outdoor fan.

CN-AC

OPEN

• Malfunctions outdoor unit. • Stop compressor and outdoor fan. • The operation LED blinks 10 times.

CN-DC

OPEN

• Malfunctions outdoor unit. • Stop compressor and outdoor fan. • The operation LED blinks 10 times.

CN-IPM

OPEN

• Malfunctions inverter circuit. • Stop compressor and outdoor fan. • The operation LED blinks 8 times.

CN-Gate 1, 2

OPEN

• Malfunctions inverter circuit • The operation LED blinks 9 times.

CN-GND

OPEN

• Malfunctions EMI /EMS

CN-FAN

OPEN

• Malfunctions fan.

CN-TH

OPEN/SHORT

• The operation LED blinks twice.

OPEN/SHORT

• The LED01K blinks 10 times. • Continue Comp. operation. (when the discharge pipe TH opens) • Stop Comp. operation (when the discharge pipe TH shorts)

CN-COMP

■ The problem of missing the connector (SUB PCB ASSY) Connectors

Condition

CN-UVW

OPEN

• Stop compressor.

CN-IPM

OPEN

• Malfunctions inverter circuit. • Stop compressor and outdoor fan. • The operation LED blinks 8 times.

CN-Gate 1, 2

OPEN

• Malfunctions inverter circuit • The operation LED blink 9 times.

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

Problem (error mode)

- 59 -

LGE Internal Use Only

D01D

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 60 R14H

OP5

R15H

OP6

R02E

R03H

R03G

R05G

R04G

R02G

R07G

OP3

CN-SUB

R13H

IC02D

R01G

SSR-MOTOR

R06G

C02F

MICOM

R01H

OP1

R10H

R11H

OP2

R12H

C02H OP4

C01H

J10

J7

J6

Q13G

R15G

R16G

Q12G

Q11G

R02L R13G

R02F R04F

R12G

R14G

C02J

R11G

R01F

R03F

6871A20212

IC02M

6871A20109 R01E

R01A

IC01M

R04H R01Z C01Z Q01Z

BZ01E

J12

C01L

R01K

C01A R01L

R02A

R03A

Q01K R02Z R02H

J1

CN-L/R

CN-ION

J11

R04K J9 C02A R02K C01K

IC02K

R03K

D01K

CN-DISP1

CN-TH

C01F

R01B

OSC01B

IC01A

C03D

J8

IC01K

ZNR01K

CN-U/D

EEPROM

R01T

R02T

R03T

R04T

R05T

C06D

J15

J14

J13

C05D

IC01D

CN-FAN

R05K

CN-SW

J18

C01C

J17

R01C

Q01M

C04D

C01M

250V/T2A

R02C

Q01C

R03C

C02C

J16

R04C

R05C

ZNR01M

C02D C01D

NF01M

D04D

ZNR01J NF01J

D05D

C01J FUSE

R01M

CN-POWER

D03D

D02D

D02K

Electronic Control Device

1. Indoor Unit MAIN P.C.B ASM ■ Room Type

SLIDE S/W C02L

J4

J3

J2

J5

CN-DISP2

LGE Internal Use Only

■ Art Cool Type TOP VIEW

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

BOTTOM VIEW

- 61 -

LGE Internal Use Only

2. Outdoor Unit • MAIN P.C.B ASM

P

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

N

U

- 62 -

V

W

LGE Internal Use Only

3. Display ASSY ■ Room Type

■ Art Cool Type TOP VIEW

BOTTOM VIEW

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 63 -

LGE Internal Use Only

4. SUB P.W.B ASSEMBLY ■ Art Cool Type TOP VIEW

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

BOTTOM VIEW

- 64 -

LGE Internal Use Only

Schematic Diagram 1. Indoor Unit

■ Room Type

5V

1%

12.1K

R02H

1%

6.2K

R04H 12.1K

R16H 12.1K

R15H 12.1K

R14H 12.1K

R13H 12.1K

R12H 12.1K

R11H

3

2

1

AVss

MP

Vdd R/W

Wt

RD

R32 62

R31 63

R30 64

MICOM GMS81516

C01M

4

R33 61

0.01 50V

R34 60 BRK R35 59

C

BRQ R36 58

SYNC

AVref R66/AN6

R67/AN7 R65/AN5

TX

27

26

25

24

23

20

19

18

17

R42/INT2

R43/INT3

R44/EC0

R45/EC2

22 R46/T10

21

R41/INT1

R47/T30

R50/Sin

R51/Sout

R52/Sclk

R53/Srdy

A11 R22 38

A10 R21 39

A8

A7

A6

A5

A4

A3

A2

A1

R20 40

R17 41

R16 42

R15 43

R14 44

R13 45

R12 46

R11 47

29

XIN

RESET'

A14 R25 35

A13 R24 36

A12 R23 37

30

A16 R27 33

ZNR01K 14D271

6171AQ3124C

POWER TRANS

FREQUENCY

R15G,6.8K

R13G,6.8K

R11G,,6.8K

5V R04F,10K

R03F,1K

Q13G

15

SLIDE S/W REMO

C02L

10V

220uF

1

2

3

5

4

3

2

1

7

6

5

4

3

2

1

1

2

3

4

5

6

7

1

2

3

4

5

6

7

4

6

CN-DISP1

3

8

3

LIVE

NEUTRAL

PRE AMP ASSY TFMS2380B

Vcc

Vout

GND

DISPLAY

LED4

LED3

LED1

LED2

FAN MOTOR

INDOOR

7

4

2

1

CN-DISP2

3

5

2

1

4

6

8

5

1

7

8

2

7

1

6

DC 12V

3

6

4

2

4

5

9

7

5

8

3

1

2

3

1

3

2

2

2

1

CN-POWER

1

COM

CN-FAN

CN-SUB

9

7

6

3

NF01M

DC 5V

REMOCON

DC 5V

DC 5V

R07G,220

R01G,220

R06G,220

R02F,10K

KTA1270Y

Q12G

2

14

R02G,220 R04G,220 R05G,220 R03G,220

DC 5V

ZNR01M INR14D471K

NF01J

ZNR01J INR14D471K SVC561D-14A

FUSE 250V/T2A

C01M,0.1,AC275V

SSR-MOTOR

R05T,10K

R01F,1K

R16G,6.8K

R14G,6.8K KTA1270Y

Q11G KRA1270Y

IC02M

3

13

16

4

12

10

5

9

11 7

C01J 0.1, AC275V

R01M,120,1/2W

NF01M

8

6

1

KID65004AP

R12G,6.8K

8 VCC

DC 12V

7 DU 6 ORG 5 Vss

SSR-MOTOR

EEPROM

D 3 Q 4

S 1 C 2

C01F,0.01/50V

Q01M KRC107M

D02D-05D 1SR139-600

D02K 1SR139-600

R05K 25K,3W,1%

D01K 1SR139-600

A15 R26 34

2

XOUT

3

R03K 1K

D01D 1SR139-600

4

3

1

2 1

+

IC02K(TLP627)

4

VSS

R04K 680

31

5V

I

32

28 R40/INT0

RX

I

R02K,1K R01K 10K DC

IC02D 7805

IC01D 7812

C01D 2200uF 35V

R02T,10K

5 6

R03 53

7

D3

R04 52

HALT R37 57

D4

R06 50

R05 51

R64/AN4

R60/AN0

D5

8

11

R57/PWM1

D6

R00 56

12

R56/PWM0

D0

13

R55/BUZ

R07 49

R63/AN3

14

R10 48

9 R03H,1K R01H,1K

15

D7

1

0.01 50V

8

10 11 7

OSC01B

IC01K(TLP621)

A0

1

DC 12V

CN-U/D

12

5

6

R03A,100

R02A,4.7K

KIA7036P C02A 10uF/50V

O

Q01K KRC102M

CST-8.00MTW

C01K 0.001 25V

16 R54/WDTO

R01 55

OP1 XXXK

R02 54

OP2 XXXK

D1

OP3 XXXK

D2

2

DC12V

10 R62/AN2

C02H

OP4 XXXK

R01A,1K

R61/AN1

C01H

OP5 XXXK

R01B,1M

2

3 13

4

14 15

5V

IC01A

RX

TX

C01A 0.01 50V

3

CN-TH

9 OP6 XXXK

+

2 4

2

4

2

3

17 1

16

18

C01C 0.01 25V

+

C05D 470uF 16V

O

C02D 0.1 50V

R04T,10K

3 4

3

5

1

4

1

5

IC01M

R01C,1K

C01L 680pF 50V

R01L,1K

R01E,1K

R02E,20

KID65084AP

R03C,20K

R02C,4.7K

R02L,10K

BZ01E

R04C,10K

Q01C KTC3198Y

DC 5V C06D 0.01 25V

+

C03D 470uF 25V

R03T,10K

PIPE-TH

BL

PK

YL

OR

RD

ROOM-TH

STEP MOTOR UP/DOWN

5V

REMOCON

5V FREQUENCY

R05C 4.7K

M C02C 0.015 50V

DC 12V C04D 0.01 25V

R01T,10K

LGE Internal Use Only

- 65 -

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

C02F,0.01/50V

■ Art Cool Type

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 66 -

LGE Internal Use Only

CN-TH2 3

3

SUCTION

1 2 1 2

CN-TH3

C03T

6

7

7

8

8 16V

3

3

TSUP_D

1 2 1 2

+5V

+

3

3

TSUP_C

1 2 1 2

9 +

C05D 470UF

+5V

107M

Q01T

R02T,10K

CN-TH4

R04T

1K

7805

IC04D

C15D C16D 103 104

4

+

3

3

DISCHARGE

1 2 1 2

R05T, 270 1/8W

R06T, 270 1/8W R07T, 270 1/8W

R08T, 270 1/8W

R09T, 270 1/8W

R03T,1K

R10T, 270 1/8W

C02T 103

LED01T (GREEN)

C04D 470UF

+

D09D 1SR139-600

FB01D FBA04HA900

IC03D,SE012N

+12V

R09D 1K

D06D 1N4937

IC01D

R06V 1K

250V

CN-TH5

1 1

CN-TH6 1

1

PIPE

3 2 3 2

OUT

4 4

8 7

3 2 3 2

TSUP_B/A

4 4

+5V

LOW R09Z 12K MED

6

C01M 104K

HIGH

OP1

R02Z 12.1K 1%

OP2

+12V

11

9 10

IC01M KID65004AP

4

5

RY-PWR

12

RY-4WAY

13

+12V

RY-FAN L

RY-FAN H

CN-TEST2

R01A 1K C01A 102

R01V 56K,3W R02V 1K 1/4W

+5V R16H 6.2K,1%

C08H 104K

3

1

R14H 12.1K,1%

C07H 104K

R12H 6.2K,1%

C06H 104K

R10H 6.2K,1%

C05H 104K

R08H 6.2K,1%

C04H 104K

R06H 6.2kK,1%

C03H 104K

MICOM

R04H 6.2K,1%

C02H 104K

1 P70

AIN06

AIN02

56

57

58

P45 46

P46 47

P47 48

R02H 18K,1% R15H R13H R11H R09H R07H R05H R03H R01H

C01H 104K

5V

SUCTION

DISCHARGE

TSUP_D

TX_A

RX_A

TX_B

RX_B

TX_C

RX_C

TX_D

RX_D

+5V

OOT_PIPE

OUT_TH

TSUP_A

61 60 TSUP_C TSUP_B 59

62

AIN01

AIN04

63

VDD 64 2 P71

AIN05

7

AIN00

W1

VASS 54

VAREF 55

P54 53

11 U1 12 W1

P44 45

P50 49

P52 51

P53 52

17 P10

P51 50

18 P11 MGT ON INT

16 P07

13 V1

19 P12

P42 43

P43 44

P41 42

21 P14

P37 40

P40 41

1K 1K 1K 1K 1K 1K 1K 1K

Q01Z KRA107M

+5V

AR02Z 10K,5%

C07K 102 50V

C08K 102 50V

C05K 102 50V

C06K 102 50V

C03K 102 50V

C04K 102 50V

C01K 102 50V

+5V R13K 1K +5V R14K 1K

+5V

R15K 10K

R09K 1K +5V

R11K 10K

R10K 1K

+5V R05K 1K +5V R06K 1K

R07K 10K +5V R01K 1K +5V

R02K 1K

R03K 10K

11

12

13

17

10 18

16

2 3

9 1

14 13

15

11

12

5 6

4

7

IC02M ULN2804

8

NF01J 9mH

4

1

3

2

R16K

1K

IC07K TLP627 1

2

3

4

IC08K TLP621

4

1

3

2

R12K

1K

IC05K TLP627 1

2

4

TLP621

IC06K

3

4

3

1

2

R08K

1K

IC03K TLP627 1

2

4

3

IC04K TLP621

4

3

1

+

R04K

C04M 330uF/25V

C01Y~C03Y 472M

CN-GND BK

1K

IC01K TLP627 1

2

2

TLP621

IC02K

3

4

+12V

IC03M

C03M 104K

C02K 102 50V

ULN2804

C03M 330uF/25V

16

17

10 18

6

LEV D_3 LEV D_2 LEV D_1

R01J 1M,1/2W

C01N D05N 1N4148 220 16V(RN)

C02X 1.0uF

+

2

7

3

CN-POWER OUTPUT (WH)

1

+12V

9 1

P36 39

15

23 P16

3

8

3

2

SURGE DSA-362MA-05F25(UL)

C02M 104K

P31 34

2

1

LEV D_4

P32 35

~

~

P30 33

-

D01N~04N 1SR139-600

CN-POWER

1

+

31 XOUT 32 VSS

RY-Start

PTC 40 Ohm CN-AC1

1

CN-AC2

1

1 WH

R01N 680,1%

30 XIN

P33 36

4

AR01Z 10K,5%

P35 38

D06N 1N4148

P34 37

24 P17 26 TEST 27 P21

+5V R02N 1.65K,1%

14

+

ZNR01J,02J SVC561

5

25 P20

22 P15

CT01N

20 P13

15 EMG

14 U1

10 V1

9

8 P77 DC_LINK_V

P76 CT

AIN07

LEV D_1

AIN03

TMP88CK49 LEV D_2

6

3 P72 4 P73 MODEL OP CURRENT OP

NC

5 P74 P75

LEV D_3 LEV D_4

1

R01B 1M

R06Z 28 P22 10K 29 RESET

10K

R05Z

DC_LINK

+5V

1

FUSE 250V,3A/3.15A

CN- TEST1

2

1 WH

R20K 82K,3W

D08K 1SR139-600

D04K 1SR139-600

R19K 82K,3W

D07K 1SR139-600

D03K 1SR139-600

D02K 1SR139-600 R18K 82K,3W D06K 1SR139-600

FUSE 250V/25A

D05K 1SR139-600

R17K 82K,3W

D01K 1SR139-600

C01X 1.0uF

CN-POWER INPUT (RDE)

+12V

4 3

1

4 3

1

2 2

5 5

1

3

1

2

3

5

2

4 4

5

3

4

1

1

2

3 2

4

5 5

3

4

1 5

1

2

3 2

4

5

3

4

1

1

2

3 2

4

2

2

1

R07Z 56K

MGT INT

+5V

R03Z,1K

R01Z,1K

R04Z 12.1K 1%

1 1 2 2 3

2

4 4

3

2

OSC01B 3 16MHz

4

3

CN-PWR

4

Power Relay

3

2

1

High Press

Comp OLP

1

2

3

+

16

14

+5V

ZNR01J ZNR561D14

3

2

CN-FAN

3

FAN MOTOR

1

D01V 1SR139-600

C02A 10 50V

R03A 100

R02A 4.7K

15

+5V

1

IC01V TLP621-BL

2

1

C01V 102

R03V 33K

CN4WAY

2

3

RY-START

1

IC01A 1 KIA7036P C04A 2 102

RY-SV

2

C01J 104,250V

NF01J

R05V 10K

R04V 10K

INT1

R01T 10k

C02J 104

Q01V C3198

~

CN-TH1

C01T 103

R08D 1.2K

D08D RU2YX

S-TRANS

+

+

C112D,100P,1KV

C11D,473,630V

C14D 473

C03D 2200UF 50V

R03D 46K 3W

R04D 10,1/4W

D05D EG01C

IC02D TLP621-BL

1

G6551

D01D~D04D 1SR139-600 R01D 27,5W

R02D 82K,1W

C01D

+

~

+

6 ~

5 ~

5 -

4 C06D 220UF D11D

35V

C07D 220UF 35V D12D C08D 220UF 35V

C09D 330UF 25V

D13D

C02D 47UF 25V

2

R05D 5.6K 1/4W 5

68UF 400V

+

CN-IPM

+

+

+

D10D

CN-GATE2 1 1N4937x4

1

7

+

CN-GATE1

2

D07D FB02D 1N4937

R06D,680 1/4W

3

~

4 9

3

9

3

8

2

8

2

7

C04S 33UF

1

7

GND

Fo

Wn Vnc 14 10

In

3 2 1 5 4 7 6

1

6 IC07S

6 IC06S

5 IC05S

5 IC04S

11

Vcc

CN-IPM

4

Vn1

GND

Fo

Vn 13

In

R06S 560

4 IC03S

Vcc

R05S 560

3

GND

Fo

R04S 560

3 IC02S

In

Un 12

R03S 560

2

R02S 560

C03S 10UF

Vcc

F0

2 IC01S

R01S 560

C02S 10UF

In GND

Up Vupc Vvp1 Vp Vvpc Vwp1 Wp Vwpc 1 6 5 4 9 8 7

Vcc

Out Si GND

15

1

+

CN-GATE2 CN-GATE1

1

2

In GND

Out Si GND

C13D 680P

NTC01K 100D-9

CN-SV1

4WAY

G/Y

RY-Power

C01S 10UF

Vup1

Vcc

Out Si GND

R07D 2.2,1/4W

1SR139-600 D09K

RY-DISC

RY-DISC

~

3

In GND

GND

IPM

+

+12V

R11Y,R12Y 56K,3W

CN-DC

DB01J,S50VB60

RY-FAN_L

7 6 5 4 3 2 1 3 2 1 5 4 8 7 6

DATA_D

CN_DATA

DATA_C

DATA_B

DATA_A

LEV C

CN-LEV C

LEV B

CN-LEV B

LEV A

CN-LEV A

LEV D

CN-LEV D

9

6

7

8

5 4

GREEN /YELLOW

1

2

3

BK

WH

LGE Internal Use Only

- 67 -

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

+

Out Si

N

R01Y 51K,3W

1

RY-4WAY

GND

W

R02Y 51K,3W DZ01Y 20V 1W

1

RY-FAN_H

Vcc

Out Si

V

R03Y 82K 1/4W Q01Y C3198

2

RY-SV

DC LOW LED01Y(RED)

Q02Y C3198

C01Y,222

2

R21K 1M,1W

R07Y,1K

R05Y 15K

+5V 1/4W

IC01Y TLP521

R04Y 2.2K 1/4W

+

165UF,400V

C09K 471,250V

GND

U

R06Y,10K

DB02J,S50VB60

REACTOR

C10K 15uF,450V

+

4 3 2 1 7 6 5 8

+

Out Si

P

COMP

474/450V

+

2200UF,400V

-

2. Outdoor Unit

9

Magnet

1

Exploded View

268711A

W0CZZ

35211B

352115B

249951

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

135313

267110

Option 152313

268711B

135312

152302

354210

147581

342800 359011

146811

131410

352115A

346810

1. Indoor Unit (7K, 9K Btu Room Type Models)

- 68 -

LGE Internal Use Only

268711A

W0CZZ

35211B

352112B

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

249951

135302 135313

267110

Option 152313

135311

268711B

147581A

354210

147581B

342800 359011

146811

131410

352112A

346810

Indoor Unit (12K Btu Room Type Model)

- 69 -

LGE Internal Use Only

268711A 263230

35211B

268711B

249951

152302 135313

267110

Option 152313

147581A

147581B

135311

354210

342800

146811

352116

352111

131410

352115

359011

W0CZZ

346810

Indoor Unit (18K, 24K Btu Room Type Models)

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 70 -

LGE Internal Use Only

135303

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

135313

135316 159830

268711A

267110

268711C 146811

249951

359012

144710A

268711B

146811

144710B

330870

- 71 349600

346810

135311A

147581

146811

135500C

354210

135311C

146811

135500B

352380

135500A

147581

263230

35211B

131410

352150

352116

352115

135515

146811

147581

135311B

Indoor Unit (Art Cool Type)

LGE Internal Use Only

435301

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

349480

435512

437210

559010

- 72 430411

447910

349600

546810

552113

554160

W6920

W0CZZA

W0CZZB

W0CZZC

268711E

649950

554031

137213A

263230C

566000

263230A

268711D

263230D

435511

137213B

661400C

552115

552116

661400A

552203B

552203A 561410

261704

W6640B

W6640A

W6200

435300

2. Outdoor Unit (FMU1860N2L/M/N/Q)

LGE Internal Use Only

435301

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

349480

435512

437210

559010

- 73 430411

447910

349600

546810

552113

554160

W6920

W0CZZA

W0CZZB

W0CZZC

268711E

649950

554031

137213A

263230B

263230C

566000

263230A

268711D

263230D

435511

137213B

661400A

552203B

661400C

661400B

552115

552116

552203A 561410

261704

W6640B

W6640A

W6200

435300

Outdoor Unit (FMU2160N3L/M/N/Q)

LGE Internal Use Only

437211

435301

349480

435512

559010

Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

- 74 430411

447910

546810

263230C

263230D

552114

552115

661400B

661400A

566000A

566000B

261704

W6640B

661400C

661400D

435300

W6640A

W6200

552116

137213A 263230F

268711D

561410C

W6920

W0CZZA

W0CZZB

W0CZZC

268711E

263230E

554160

349600

554031

552203B 552203A

561410B

561410A

649950

435511

137213B

Outdoor Unit (FMU3060N4L/M/N/Q)

LGE Internal Use Only

P/NO : 3828A20208E

JULY, 2008