LG LN-0320CC, LN-0320ACF, LN-0321CC, LN-0321ACF, LN-C0362SA0 Service Manual

Ducted(Central) Split Air Conditioner

SERVICE MANUAL

MODELS: 3RT: LN-0320CC/AC(F)

LN-0321CC/AC(F) LN-C0362SA0 LN-C0362TA0

4RT: LN-0420CC/AC(F)

LN-0421CC/AC(F) LN-04B0CC/AC(F) LN-C0482SA0 LN-C0482TA0 LN-C048BTA0

5RT: LN-0520CC/AC(F)

LN-0521CC/AC(F) LN-05B0CC/AC(F) LN-C0602SA0 LN-C0602TA0 LN-C060BTA0

— 2 —

Contents

General Data ......................................................................................................................... 3

Dimensions ........................................................................................................................... 6

Wiring Diagram..................................................................................................................... 7

Troubleshooting Guide ...................................................................................................... 11

Features of Controller........................................................................................................ 17

Exploded View and Replacement Parts List.................................................................... 18

Specification of Components............................................................................................ 28

— 3 —

General Data

Table-1

1) Test Condition of ARI Rated Cooling Capacity : Ambient:95°F , Air entering temprature : 80°F DB and 67°F WB

2) ARI standard 210/240 or 360 for EER 270 for Sound

3) Filters are standard supply.

Nominal ton (Ton) 3 3 4 4

Models

Capacity ARI Net Cooling Capacity (BTU/hr)

(Kcal/h)

Electrical Data

Voltage (V,PH) M.C.A(with standard motor)

Cooling (Amps)

Power Input Cooling (Watt)

Performance

Air Circulation

Nominal CFM

CFM EER Cooling (BTU/hr.W) Sound Rating Cooling dB(A)

Features

Filter type

Compressor

Type Quantity

Outdoor Coil

Type Tube size(O.D) (inch)

(mm) Row/FPI Lengh (inch)

(mm) Face area (sq.ft)

(m2)

Indoor Coil

Type Tube size(O.D) (inch)

(mm) Row/FPI Lengh (inch)

(mm) Face area (sq.ft)

(m2)

Outdoor FanType

No. Used/Diameter(in.) Drive Type CFM No. Motor/Motor output(Hp) Motor RPM

Indoor Fan

Type No. Used Diameter/Width(in.) Drive Type/Motor Step No.motors Motor output(standard/oversized) Motor rpm(Standard/oversized)

Drain Connection Size(in.)

Refrigerant

Refrigerant Charge

(Lbs)

Dimensions

Indoor unit (WxHxD)

(inch)

(mm) Outdoor unit (WxHxD)

(inch)

(mm)

Weight Indoor unit (kg)

(lbs) Outdoor unit (kg)

(lbs)

LN-0320CC/AC(F) LN-0321CC/AC(F) LN-0420CC/AC(F) LN-0421CC/AC(F)

LN-C0362SA0 LN-C048TA0

35,000 35,000 48,000 47,000

8,820 8,820 12,096 11,845

220V,1PH 220V,1PH 220V,1PH 220V,1PH

20.2 20.2 23 31.7 4,000 3,750 5,000 4,200 1,300 1,200 1,695 1,600

7.89 9.3 9.6 -

8 8 8 6.5

Washable & antifungus Washable & antifungus Washable & antifungus Washable & antifungus

Reciprocating Scoll Reciprocating Scroll

1111

High efficiency High efficiency High efficiency High efficiency

0.276 0.276 0.276 9/32

7777

2R/18FPI 2R/17FPI 2R/18FPI 2R/18FPI

32.2 32.2 48.8 48 27/32

818.6 756 1,240.4 1,240

6.67 6.67 11.22 11.19

0.62 0.62 1.04 1.04

High efficiency High efficiency High efficiency High efficiency

0.375 0.375 0.375 3/8

9.52 9.52 9.52 9.52

2R/18FPI 2R/18FPI 2R/18FPI 2R/18FPI

15.16 15.16 15.75 15 3/4

385 360 400 400

3.55 3.55 4.63 4.63

0.33 0.33 0.43 0.43

Propeller Propeller Propeller Propeller

1EA/18.1" 1EA/18.1" 1EA/22.7" 1EA/21 7/8"

Direct Direct Direct Direct 2,048 2,048 3,743 3,700

1/0.12 1/0.12 1/0.3 1/0.28

930 930 970 970

Centrifugal Blower Fan

1EA 1EA 1EA 1EA

7.9"/7.2" 7.9"/7.2" 7.9"/11" 11 5/32 (10 5/8) Direct/3 Direct/3 Direct/3 Direct/3

1EA 1EA 1EA 1EA

0.47hp/N.A 0.47hp/N.A 0.47hp/N.A 0.73hp/N.A 1,192/N.A 1,192/N.A 1,192/N.A 1,080/N.A

3/4" 3/4" 3/4" 3/4"

3.7 3.7 6.8 6.39

18.5*18.9*39.9 18.5*18.9*39.9 23.6*19.7*44.7 23 5/8*44 11/16*19 11/16 470*480*1014 470*480*1014 600*500*1135 600*1,135*500

34.3*31.5*12.6 34.3*31.5*12.6 28.4*33.7*27.2 28 13/32*33 21/32*27 7/32 870*800*320 870*800*320 722*855*691 722*855*691

53 53 59 63

117 117 130 139

65 65 105 105

143 143 214 231

— 4 —

General Data

Nominal ton (Ton) 4 5 5 5

Models

Capacity ARI Net Cooling Capacity (BTU/hr)

(Kcal/h)

Electrical Data

Voltage (V,PH) M.C.A(with standard motor)

Cooling (Amps)

Power Input Cooling (Watt)

Performance

Air Circulation

Nominal CFM

CFM EER Cooling (BTU/hr.W) Sound Rating Cooling dB(A)

Features

Filter type

Compressor

Type Quantity

Outdoor Coil

Type Tube size(O.D) (inch)

(mm) Row/FPI Lengh (inch)

(mm) Face area (sq.ft)

(m2)

Indoor Coil

Type Tube size(O.D) (inch)

(mm) Row/FPI Lengh (inch)

(mm) Face area (sq.ft)

(m2)

Outdoor FanType

No. Used/Diameter(in.) Drive Type CFM No. Motor/Motor output(Hp) Motor RPM

Indoor Fan

Type No. Used Diameter/Width(in.) Drive Type/Motor Step No.motors Motor output(standard/oversized) Motor rpm(Standard/oversized)

Drain Connection Size(in.)

Refrigerant

Refrigerant Charge

(Lbs)

Dimensions

Indoor unit (WxHxD)

(inch)

(mm) Outdoor unit (WxHxD)

(inch)

(mm)

Weight Indoor unit (kg)

(lbs) Outdoor unit (kg)

(lbs)

LN-04B0CC/AC(F) LN-0520CC/AC(F) LN-0521CC/AC(F) LN-05B0CC/AC(F)

LN-C048BTA0 LN-C0602TA0 LN-C060BTA0

48,000 58,000 58,000 60,000 12,097 14,616 14,616 15,121

220V,3PH 220V,1PH 220V,1PH 220V,3PH

26.1 30 41.1 31.1 4,800 6,700 6,500 6,650 1,600 1,900 1,800 1,800

- 8.5 - -

6.5 8 10.0 6.5

Washable & antifungus Washable & antifungus Washable & antifungus Washable & antifungus

Reciprocating Reciprocating Reciprocating Reciprocating

11- 2

High efficiency High efficiency High efficiency High efficiency

9/32 0.276 9/32 9/32

7777 2R/18FPI 2R/18FPI 2R/18FPI 2R/18FPI 48 27/32 53.4 53 7/16 53 7/16

1,240.4 1,357.4 1,357 1,357.4

11.19 12.27 12.27 12.27

1.04 1.14 1.14 1.14

High efficiency High efficiency High efficiency High efficiency

3/8 0.375 3/8 3/8

9.52 9.52 9.52 9.52

2R/18FPI 3R/16FPI 2R/16FPI 3R/16FPI

15 3/4 15.75 15 3/4 15 3/4

400 400 400 400

4.63 4.63 4.63 4.63

0.43 0.43 0.43 0.43

Propeller Propeller Propeller Propeller

1EA/21 7/8 1EA/22.7" 1EA/21 7/8 1EA/21 7/8

Direct Direct Direct Direct 3,700 3,743 3,700 3,700

1EA/0.28 1/0.3 1EA/0.28 1EA/0.28

970 970 970 970

Centrifugal Blower Fan

1EA 1EA 1EA 1EA

11 5/31 (10 5/8) 7.9"/11" 11 5/31 (10 5/8) 11 5/31 (10 5/8)

Direct/3 Direct/3 Direct/3 Direct/3

1EA 1EA 1EA 1EA

0.73hp/N.A 0.73hp/N.A 0.73hp/N.A 0.73hp/N.A 1,080/N.A 1,195/N.A 1,080/N.A 1,080/N.A

3/4 3/4" 3/4 3/4

6.39 8.3 8.27 8.27

235/8*4411/16*1611/16 23.6*19.7*44.7 235/8*4411/16*1911/16 235/8*4411/16*1611/16

600*1,135*500 600*500*1135 600*1,135*500 600*1,135*500

2813/32*3321/32*277/32 28.4*33.7*27.2 2813/32*3321/32*277/32 2813/32*3321/32*277/32

722*855*691 722*855*691 722*855*691 722*855*691

63 63 63 63 139 139 139 139 105 110 105 110 231 243 231 243

Table-2

— 5 —

General Data

Nominal ton (Ton) 4 5 Models

Capacity ARI Net Cooling Capacity (BTU/hr)

(Kcal/h)

Electrical Data

Voltage (V,PH) M.C.A(with standard motor)

Cooling (Amps)

Power Input Cooling (Watt)

Performance

Air Circulation

Nominal CFM

CFM EER Cooling (BTU/hr.W) Sound Rating Cooling dB(A)

Features

Filter type

Compressor

Type Quantity

Outdoor Coil

Type Tube size(O.D) (inch)

(mm) Row/FPI Lengh (inch)

(mm) Face area (sq.ft)

(m2)

Indoor Coil

Type Tube size(O.D) (inch)

(mm) Row/FPI Lengh (inch)

(mm) Face area (sq.ft)

(m2)

Outdoor FanType

No. Used/Diameter(in.) Drive Type CFM No. Motor/Motor output(Hp) Motor RPM

Indoor Fan

Type No. Used Diameter/Width(in.) Drive Type/Motor Step No.motors Motor output(standard/oversized) Motor rpm(Standard/oversized)

Drain Connection Size(in.)

Refrigerant

Refrigerant Charge

(Lbs)

Dimensions

Indoor unit (WxHxD)

(inch)

(mm) Outdoor unit (WxHxD)

(inch)

(mm)

Weight Indoor unit (kg)

(lbs) Outdoor unit (kg)

(lbs)

LN-C0482SA0 LN-C0602SA0

47,000 58,000 11,845 14,617

220V 220V,1PH

31.7 41.1 4,200 6,000 1,600 1,800

11 10

6.5 6.5

Washable & antifungus Washable & antifungus

Scroll Scroll

11

High efficiency High efficiency

9/32 9/32

77

2R/18FPI 2R/18FPI

48 27/32 53 7/16

1,240.4 1,357.4

11.19 12.27

1.04 1.14

High efficiency High efficiency

3/8 3/8

9.52 9.52

2R/18FPI 3R/16FPI

15 3/

4 15

3

/

4

400 400

4.63 4.63

0.43 0.43

Propeller Propeller

1EA/21 7/

8 1EA/21

7

/

8

Direct Direct 3,700 3,700

1EA /0.28 1EA /0.28

970 970

Centrifugal Blower

1EA 1EA

11 5/31 (10 5/8) 11 5/31 (10 5/8)

Direct/3 Direct/3

1EA 1EA

0.73hp/N.A 0.73hp/N.A 1,080/N.A 1,080/N.A

3/4 3/4

6.39 8.27

235/8*4411/16*1911/16 235/8*4411/16*1911/16

600*1,135*500 600*1,135*500

35

3

/7*48*144/7 353/7*48*177/4

900*1,220*370 900*1,220*370

63 63 139 139 105 105 231 231

Table-3

1. Indoor unit

Unit Dimensions

2. Outdoor unit

Unit: inch(mm)

— 6 —

Dimensions

LN-0320CC/AC(F), LN-0420CC/AC(F), LN-0520CC/AC(F)

27.2"(691)

33.7"(855)

28.4"(722)

31.5"(800)

21.5"(546)

12.6"(320)

34.3"(870)

Filter Provision

M

C

E

D

H

G

F

Q

N

L

K

I

J

P

B

A

Liqid lineLiqid lineLiquid line

R

Condensate Drain-Upflow 3/4" NPT-Female

Condensate Drain-Horizontal 3/4" NPT-Female

Suction lineSuction lineSuction line

35.4"(900)

48.2"(1,225)

14.6"(370)

A 18.5 (470) 23.6 (600) B 18.9 (480) 19.7 (500) C 39.9 (1014) 44.7 (1135) D 3.3 (84) 5.4 (136) E 11.9 (303) 13.0 (329)

F 5.6 (142) 7.1 (181) G 12.0 (304) 12.6 (319) H 0.6 (15) 0.6 (15)

I 4.3 (110) 6.7 (170)

J 6.3 (160) 9.4 (240) K 1.7 (43) 2.5 (64)

L 2.0 (50) 2.8 (71) M 2.0 (52) 2.3 (58) N 1.8 (45) 2.1 (54) P 1.3 (32) 1.5 (38) Q 8.7 (221) 11.2 (285) R 19.1 (485) 23.0 (584)

Unit: inch(mm)

MODEL

3RT

4RT 5RT

3RT SIDE DISCHARGE MODELS

4, 5RT TOP DISCHARGE MODELS

4, 5RT SIDE DISCHARGE MODELS

FACTORY WIRING

OPTIONAL WIRING

FIELD WIRING

BK: BLACK OR: ORANGE YL:YELLOW

BR: BROWN RD: RED WH: WHITE

BL: BLUE GN/YL: GREEN/YELLOW

1Ø 220V,60Hz

POWER SUPPLY

1Ø 220V,60Hz

POWER SUPPLY

OUTDOOR UNIT

INDOOR UNIT

NOTES

TERMINAL BLOCK

THERMOSTAT FOR EVA

PILLAR TERMINAL

WH

(N) (L)

BK

WH

RD

WH

BK

OR

BK

BR

YL

ORORBK

L1

T2

L2

A

B

A

b

c

a

T1

WH

GN/YL

BK

OR

BL

COMP

EH

*

P. T. C

CAPACITOR

MAGNETIC CONTACT

(For COMP)

POWER RELAY

(

For

I/

MOTOR

)

MAGNETIC CONTACT

(F or E/Heater)

S

R

C

MOTOR

(

OUT

)

MOTOR

(IN)

DIAGRAM WIRING

FUSE

(

250V,10A

)

4 6

(with LG's THERMOSTAT)

DIAGRAM WIRING

(with locally purchased THERMOSTAT)

TRANS

1

2

3

4

5

1

34

2

MODEL

*

:

LN _ 04

****

LN _ 05

****

abc

BK(SUPER_HI

)

BL(HI

)

BL(HI

)

BK(SUPER_HI

)

RD(LOW

)

RD(LOW

)

P/NO : 3854A20068D

AC 24V

Fan

Comp

Heater

AC 24V

Fan

Comp

Heater

ELECTRO-MECHANICAL THERMOSTAT

L

N

1

2

3

MECHANICAL THERMOSTAT

ELECTRIC HEATER

USING ELECTRIC HEATER

A

T1 T2

L1

B

R

G

Y

W

P.T.C IS AN OPTIONAL PART, IT IS DEPENDED ON THE TYPE AND GRADE OF COMPRESSOR. REFER TO THE TECHNICAL GUIDE BOOK OR SERVICE MANUAL FOR DETAIL INFORMATION.

MODEL

*

:

LN _ 04

****

LN _ 05

****

abc

BK(SUPER_HI

)

BL(HI

)

BL(HI

)

BK(SUPER_HI

)

RD(LOW

)

RD(LOW

)

P.T.C IS AN OPTIONAL PART, IT IS DEPENDED ON THE TYPE AND GRADE OF COMPRESSOR. REFER TO THE TECHNICAL GUIDE BOOK OR SERVICE MANUAL FOR DETAIL INFORMATION.

FACTORY WIRING

OPTIONAL WIRING

FIELD WIRING

BK: BLACK OR: ORANGE YL:YELLOW

BR: BROWN RD: RED WH: WHITE

BL: BLUE GN/YL: GREEN/YELLOW

1Ø 220V,60Hz

POWER SUPPLY

1Ø 220V,60Hz

POWER SUPPLY

OUTDOOR UNIT

INDOOR UNIT

TERMINAL BLOCK

THERMOSTAT FOR EVA

PILLAR TERMINAL

WH

BK

WH

RD

RD YL

WH

BK

OR

BK

BR

YL

ORORBK

L1

T2

L2

A

B

A

b

c

a

T1

WH

GN/YL

BK

OR

BL

COMP

EH

*

P. T. C

CAPACITOR

MAGNETIC CONTACT

(For COMP)

POWER RELAY

(

For

I/

MOTOR

)

MAGNETIC CONTACT

(F or E/Heater)

S

R

C

MOTOR

(

OUT

)

MOTOR

(IN)

FUSE

(

250V,10A

)

4 6

NOTES

TRANS

TIME DELAY P.C.B

1

2

3

4

5

1

34

2

P/NO : 3854A20068D

AC 24V

Fan

Comp

Heater

AC 24V

Fan

Comp

Heater

ELECTRO-MECHANICAL THERMOSTAT

L

N

1

2

3

MECHANICAL THERMOSTAT

ELECTRIC HEATER

USING ELECTRIC HEATER

A

T1 T2

L1

B

R

G

Y

W

— 7 —

Wiring Diagram

LN-0520CC/AC(F), LN-0420CC/AC(F)

— 8 —

Wiring Diagram

FACTORY WIRING

OPTIONAL WIRING

FIELD WIRING

BK: BLACK OR: ORANGE YL:YELLOW

BR: BROWN RD: RED WH: WHITE

BL: BLUE GN/YL: GREEN/YELLOW

1Ø 220V,60Hz

POWER SUPPLY

1Ø 220V,60Hz

POWER SUPPLY

OUTDOOR UNIT

INDOOR UNIT

TERMINAL BLOCK

THERMOSTAT FOR EVA

PILLAR TERMINAL

WH

(N) (L)

BK

WH

RD

WH

BK

OR

BK

BR

YL

ORORBK

L1

T2

L2

A

B

A

b

c

a

T1

WH

GN/YL

BK

BK BK

BK

OR

BL

COMP

EH

CAPACITOR

MAGNETIC CONTACT

(For Comp)

POWER RELAY

(

For

I/

Motor

)

MAGNETIC CONTACT

(For E/Heater)

S

R

C

MOTOR

(

OUT

)

MOTOR

(IN)

DIAGRAM WIRING

FUSE

(

250V,10A

)

4 6

NOTES

TRANS

1

2

3

4

5

1

34

2

abc

BK(SUPER_HI)BL(HI)RD(LOW

)

P/NO : 3854A20091C

AC 24V

Fan

Comp

Heater

AC 24V

Fan

Comp

Heater

ELECTRO-MECHANICAL THERMOSTAT

L

N

1

2

3

MECHANICAL THERMOSTAT

ELECTRIC HEATER

USING ELECTRIC HEATER

A

T1 T2

L2

L1

B

R

G

Y

W

(with LG's THERMOSTAT)

FACTORY WIRING

OPTIONAL WIRING

FIELD WIRING

BK: BLACK OR: ORANGE YL:YELLOW

BR: BROWN RD: RED WH: WHITE

BL: BLUE GN/YL: GREEN/YELLOW

1Ø 220V,60Hz

POWER SUPPLY

1Ø 220V,60Hz

POWER SUPPLY

OUTDOOR UNIT

INDOOR UNIT

TERMINAL BLOCK

THERMOSTAT FOR EVA

PILLAR TERMINAL

WH

(N) (L)

BK

WH

RD

RD YL

WH

BK

OR

BK

BR

YL

ORORBK

L1

T2

L2

A

B

A

b

c

a

T1

WH

GN/YL

BK

BK BK

BK

OR

BL

COMP

EH

CAPACITOR

MAGNETIC CONTACT

(For Comp)

POWER RELAY

(

For

I/

Motor

)

MAGNETIC CONTACT

(For E/Heater)

S

R

C

MOTOR

(

OUT

)

MOTOR

(IN)

DIAGRAM WIRING

FUSE

(

250V,10A

)

4 6

NOTES

TRANS

TIME DELAY P.C.B

1

2

3

4

5

1

34

2

abc

BK(SUPER_HI)BL(HI)RD(LOW

)

P/NO : 3854A20091C

AC 24V

Fan

Comp

Heater

AC 24V

Fan

Comp

Heater

ELECTRO-MECHANICAL THERMOSTAT

L

N

1

2

3

MECHANICAL THERMOSTAT

ELECTRIC HEATER

USING ELECTRIC HEATER

A

T1 T2

L2

L1

B

R

G

Y

W

(with locally purchased THERMOSTAT)

LN-0320CC/AC(F), LN-0321CC/AC(F), LN-C0362SA0

— 9 —

Wiring Diagram

FACTORY WIRING

OPTIONAL WIRING

FIELD WIRING

3Ø 220V, 60Hz

POWER SUPPLY

OUTDOOR UNIT

INDOOR UNIT

RST

TERMINAL

BLOCK

TERMINAL

BLOCK

TERMINAL

BLOCK

TERMINAL

BLOCK

ELECTRIC HEATER

EH

THERMISTER

FOR EVA

12

TERMINAL

BLOCK

USING ELECTRIC HEATER

RST

3Ø 220V, 60Hz

POWER SUPPLY

MODEL

abc

34

P/NO : 3854A20068F

BK

OR

BL

TERMINAL

BLOCK

PILLAR

TERMINAL

MAGNETIC CONTACT

(F or E/heater)

CRANK CASE

HEATER

CAPACITOR

MOTOR

(OUT)

MOTOR

(IN)

a

b

c

COMP

PILLAR

TERMINAL

FUSE

(250V, 10A)

POWER RELAY

(F or I/Motor)

GN/YL

WH

BK

RD

BK BL

BL

RD

OR

BL

GN/YL

WH

RD

RD YL BK

1

AC 24V

Fan

Comp

L

N

1

2

3

R

G

Y

W

Heater

AC 24V

ELECTRO-MECHANICAL

THERMOSTAT

Fan

Comp

Heater

2

3

4

5

RD

RD RD

RD

A

B

RDBK

T1 T2 T3

BK

OR

OR BL

BL

BK

4

6

BR

YL

OR

YL

WH

BK:BLACK

BR:BROWN

BL:BLUE

OR:ORANGE

RD:RED

GN/YL:GREEN/YELLOW

YL:YELLOW

WH:WHITE

NOTES

TRANS

DIAGRAM WIRING

TIME DELAY P.C.B

LN-04BOCC LN-05BOCC

BK(SUPER-HI) BK(SUPER-HI)

BL(HI) BL(HI)

RD(LOW) RD(LOW)

MECHANICAL THERMOSTAT

LN-04B0CC/AC(F), LN-05B0CC/AC(F), LN-C048BTA0, LN-C060BTA0

FACTORY WIRING

OPTIONAL WIRING

FIELD WIRING

BK: BLACK OR: ORANGE YL:YELLOW

BR: BROWN RD: RED WH: WHITE

BL: BLUE GN/YL: GREEN/YELLOW

1Ø 220V,60Hz

POWER SUPPLY

1Ø 220V,60Hz

POWER SUPPLY

OUTDOOR UNIT

INDOOR UNIT

TERMINAL BLOCK

THERMISTER FOR EVA

FILLER TERMINAL

WH

BK

WH

RD

RD YL

WH

BK

OR

BK

YL

ORORBK

L1

T2

L2

A

B

A

b

c

a

T1

WH

GN/YL

BK

OR

ORBRYL

BL

COMP

EH

P. T. C

CAPACITOR

MAGNETIC CONTACT

(For COMP)

POWER RELAY

(

For

I/

MOTOR

)

MAGNETIC CONTACT

(F or E/Heater)

S

R

C

MOTOR

(

OUT

)

MOTOR

(IN)

DIAGRAM WIRING

FUSE

(

250V,10A

)

4

6

NOTES

TRANS

TIME DELAY P.C.B

1

2

3

4

5

1

34

2

MODEL

P. T. C

LN _ 0421CC

LN

_

0521CC

X O

abc

BK(SUPER_HI

)

BL(HI

)

BL(HI

)

BK(SUPER_HI

)

RD(LOW

)

RD(LOW

)

P/NO : 3854A20068J

AC 24V

Fan

Comp

Heater

AC 24V

Fan

Comp

Heater

ELECTRO-MECHANICAL THERMOSTAT

L

N

1

2

3

MECHANICAL THERMOSTAT

ELECTRIC HEATER

USING ELECTRIC HEATER

A

T1 T2

L1

B

R

G

Y

W

LN-0421CC/AC(F), LN-0521CC/AC(F), LN-C0482TA0, LN-C0602TA0

— 10 —

Wiring Diagram

FACTORY WIRING

OPTIONAL WIRING

FIELD WIRING

(N)

(L)

TERMINAL

BLOCK

TERMINAL

BLOCK

TERMINAL

BLOCK

TERMINAL

BLOCK

MAGNETIC CONTACT

(For comp)

MAGNETIC CONTACT

(For E/Heater)

POWER RELAY

(For I/Motor)

TERMINAL

BLOCK

TERMINAL

BLOCK

*

: P.T.C IS AN OPTIONAL PART,

IT IS DEPENDED ON THE TYPE AND GRADE OF COMPRESSOR. REFER TO THE TECHNICAL GUIDE BOOK OR SERVICE MANUAL FOR DETAIL INFORMATION.

THERMOSTAT

FOR EVA

PILLAR

TERMINAL

FUSE

(250V, 10A)

PILLAR

TERMINAL

ELECTRO-MECHANICAL

THERMOSTAR

MECHANICAL

THERMOSTAR

1

AC 24V

L

R

G

Y

W

N

1

2

3

Fan

Comp

Heater

AC 24V

Fan

Comp

Heater

2

3

4

5

PILLAR

TERMINAL

ELECTRO-MECHANICAL

THERMOSTAR

MECHANICAL

THERMOSTAR

1

AC 24V

L

R

G

Y

W

N

1

2

3

Fan

Comp

Heater

AC 24V

Fan

Comp

Heater

2

3

4

5

WH

*P.T.C

CAPACITOR

MOTOR

(OUT)

MOTOR

(OUT)

MOTOR

(IN)

34

12

2

OUTDOOR UNIT

INDOOR UNIT

WH

GN/YL

BK

(N)

(L)

TERMINAL

BLOCK

WH BK

BK

BR

OR

BK

OR

BK

OR YL

YL

TERMINAL

BLOCK

CAPACITOR

MOTOR

(OUT)

MOTOR

(OUT)

BK

BR

OR

BK

OR

BK

OR YLYL

RD

BK

BL

OR

WH

BK

TERMINAL

BLOCK

THERMOSTAT

FOR EVA

1

BK

4 6

A

a

c

b

A

C

COMP

R

S

WH

*P.T.C

CAPACITOR

WH

BK

RD

C

COMP

R

S

L2L1

T2T1

B

MAGNETIC CONTACT

(For comp)

A

L2L1

T2T1

B

RD

TERMINAL

BLOCK

34

RD

OR BL

TERMINAL

BLOCK

CAPACITOR

MOTOR

(IN)

OUTDOOR UNIT

INDOOR UNIT

BR

OR

YL

a

c

b

OR BL

BL

POWER RELAY

(For I/Motor)

FUSE

(250V, 10A)

BK

4 6

A

B

RD

BL

RD

BL

OR

TERMINAL

BLOCK

PILLAR

TERMINAL

WH

GN/YL

BK

BL

OR

WH

BK

BL

RD

RD BKYL

OR

BK:BLACK

BR:BROWN

BL:BLUE

OR:ORANGE

RD:RED

GN/YL:GREEN/YELLOW

YL:YELLOW

WH:WHITE

NOTES

FACTORY WIRING

OPTIONAL WIRING

FIELD WIRING

BK:BLACK

BR:BROWN

BL:BLUE

OR:ORANGE

RD:RED

GN/YL:GREEN/YELLOW

YL:YELLOW

WH:WHITE

NOTES

TRANS

1Ø 220V,60Hz

POWER SUPPLY

1Ø 220V,60Hz

POWER SUPPLY

MODEL

4RT 5RT

BK(SUPER-HI)

BL(HI)

BK(SUPER-HI)

RD(LOW) RD(LOW)

a

b

c

*

: P.T.C IS AN OPTIONAL PART,

IT IS DEPENDED ON THE TYPE AND GRADE OF COMPRESSOR. REFER TO THE TECHNICAL GUIDE BOOK OR SERVICE MANUAL FOR DETAIL INFORMATION.

MODEL

4RT 5RT

BK(SUPER-HI)

BL(HI)

BK(SUPER-HI)

RD(LOW) RD(LOW)

a

b

c

OUTDOOR UNIT

INDOOR UNIT

OUTDOOR UNIT

INDOOR UNIT

DIAGRAM WIRING

(with LG's THERMOSTAT)

DIAGRAM WIRING

(with locally purchased THERMOSTAT)

1Ø 220V,60Hz

POWER SUPPLY

EH

P/NO : 3854A20068N

USING ELECTRIC HEATER

TERMINAL

BLOCK

ELECTRIC HEATER

A

L2L1

T2T1

B

TRANS

TIME DELAY P.C.B

MAGNETIC CONTACT

(For E/Heater)

1Ø 220V,60Hz

POWER SUPPLY

EH

P/NO : 3854A20068N

USING ELECTRIC HEATER

TERMINAL

BLOCK

ELECTRIC HEATER

A

L2L1

T2T1

B

LN-C0482SA0, LN-C062SA0

LG LN-0320CC, LN-0320ACF, LN-0321CC, LN-0321ACF, LN-C0362SA0 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual