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LG Multi V ARNU283M3A4 Svc Manual

Multi V ARNU363M3A4\ Multi V ARNU423M3A4\ Multi V ARNU093M2A4\ Multi V ARNU073M2A4\ Multi V ARNU123M2A4\ Multi V ARNU153M2A4\ Multi V ARNU183M2A4\ Multi V ARNU243M2A4\ Multi V ARNU363M2A4\ Multi V ARNU283M2A4\ Multi V ARNU423M2A4\ Multi V ARNU483M3A4\ Multi V ARNU543M3A4

Made by: LG
Type: Svc Manual
Category: Air Conditioner
Pages: 14
Size: 3.42 MB

 

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background image

Multi V Air Conditioner

SVC MANUAL(Exploded View)

MODEL : 

CAUTION

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

CONFIDENTIAL

Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication, 
modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained 
the prior written consent of the LG Electronics entity from which you received this Service Manual. The material 
covered by this prohibition includes, without limitation, any text, graphics or logos in this Service Manual.

Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.

ARNU073M2A4
ARNU093M2A4
ARNU123M2A4
ARNU153M2A4
ARNU183M2A4
ARNU243M2A4
ARNU283M2A4
ARNU363M2A4
ARNU423M2A4

ARNU283M3A4
ARNU363M3A4
ARNU423M3A4
ARNU483M3A4
ARNU543M3A4


background image

- 2 -

Copyright © 2018 LG Electronics Inc. 
All rights reserved. Only training and service purposes.

1. Specification

Type

Ceiling Concealed Duct -Middle Static  

Model

Unit  

ARNU073M2A4 ARNU093M2A4 ARNU123M2A4 

Cooling Capacity  

kW  

kcal/h  

Btu/h  

Heating Capacity  

kW  

kcal/h  

Btu/h  

Power Input

Nominal W
Rated W

Casing  

Dimensions

(WxHxD)

Body  

mm  

inch  

Coil  

Rows x Columns x FPI  
Face Area  

m

(ft

2

Fan  

Type  
Motor Output x Number  

W  

Running Current  

A  

Air Flow Rate(H / M / L)

(High Mode-Factory Set)
External static pressure  

CMM  

CFM  

mmAq(Pa)

Air Flow Rate(H / M / L)

(Standard mode)
External static Pressure

CMM  

CFM  

mmAq(Pa)

Drive  
Motor type  

Temperature Control  

Sound Absorbing Thermal Insulation Material  

Air Filter 

Safety Device  

Pipe Connections  

Liquid Side  

mm(inch)  

Gas Side  

mm(inch)  

Drain Pipe(Internal Dia.)  

mm(inch)  

Net Weight  

Body  

kg(lbs)  

Sound Pressure Levels (H / M / L)

dB(A)

Sound Power Levels (H / M / L)

dB(A)

Power Supply  

Ø, V, Hz  

Refrigerant Control   
Transmission Cable (AWG# -C)

2.2

1 900
7 500

2.5

2 200
8 500

32

430

Galvanized Steel Plate

1 250 × 270 × 700

49-7/32 x 10-5/8 x 27-9/16

2 x 13 x 18

0.27(2.91)

Sirocco Fan

350 x 1

2.3

13.3 / 9.4 / 6.8

470 / 332 / 240

6(59)

13.3 / 9.4 / 6.8

470 / 332 / 240

5(49)

Direct
BLDC

Microprocessor, Thermostat

for cooling and heating  

Foamed polystrene 

-

Fuse

Ø6.35(1/4)
Ø12.7(1/2)

25(1)

37.6(83)

38 / 37 / 36
53 / 52 / 52

1, 208-230, 60

EEV

AWG 18 x 2C

2.8

2 400
9 600

3.2

2 800

10 900

32

430

Galvanized Steel Plate

1 250 × 270 × 700

49-7/32 x 10-5/8 x 27-9/16

2 x 13 x 18

0.27(2.91)

Sirocco Fan

350 x 1

2.3

13.3 / 9.4 / 6.8

470 / 332 / 240

6(59)

13.3 / 9.4 / 6.8

470 / 332 / 240

5(49)

Direct
BLDC

Microprocessor, Thermostat

for cooling and heating  

Foamed polystrene

-

Fuse

Ø6.35(1/4)
Ø12.7(1/2)

25(1)

37.6(83)

38 / 37 / 36
53 / 52 / 52

1, 208-230, 60

EEV

AWG 18 x 2C

3.6

3 100

12 300

4

3 400

13 600

33

430

Galvanized Steel Plate

1 250 × 270 × 700

49-7/32 x 10-5/8 x 27-9/16

2 x 13 x 18

0.27(2.91)

Sirocco Fan

350 x 1

2.3

14.8 / 10.2 / 7.4

523 / 360 / 261

6(59)

14.8 / 10.2 / 7.4

523 / 360 / 261

5(49)

Direct
BLDC

Microprocessor, Thermostat

for cooling and heating  

Foamed polystrene

-

Fuse

Ø6.35(1/4)
Ø12.7(1/2)

25(1)

37.6(83)

38 / 37 / 36
54 / 53 / 53

1, 208-230, 60

EEV

AWG 18 x 2C

Notes:-

1. Capacities are based on the following conditions:
      Cooling      • Indoor temp. 27°C[80.6°F]DB/ 19°C[66.2°F]WB

                        • Outdoor temp. 35°C[95°F]DB/ 24°C[75.2°F]WB
                        • Interconnecting Piping Length 7.5m(24.6ft)
                        • Level Difference of Zero

      Heating      • Indoor temp. 20°C[68°F]DB/ 15°C[59°F]WB

                        • Outdoor temp. 7°C[44.6°F]DB/ 6°C[42.8°F]WB
                        • Interconnecting Piping Length 7.5m(24.6ft)
                        • Level Difference of Zero

2. Capacities are net capacities
3. Due to our policy of innovation some specifications may be changed without prior notification
4. To be added for more available Models
5. EEV : Electronic Expansion Valve
6. Noise Level is Standard Mode

(for actual High Mode(factory set) condition, Noise Level may exceed the standard level by 1.5dBA)

Conversion Formula

kcal/h= kW x 860
Btu/h = kW x 3 412
CFM = m

3

/min x 35.3

l/s = CMM x 1 000/60 


background image

- 3 -

Copyright © 2018 LG Electronics Inc. 
All rights reserved. Only training and service purposes.

Notes:-

1. Capacities are based on the following conditions:

     Cooling    • Indoor temp. 27°C[80.6°F]DB/ 19°C[66.2°F]WB

                     • Outdoor temp. 35°C[95°F]DB/ 24°C[75.2°F]WB
                     • Interconnecting Piping Length 7.5m(24.6ft)
                     • Level Difference of Zero

     Heating    • Indoor temp. 20°C[68°F]DB/ 15°C[59°F]WB

                     • Outdoor temp. 7°C[44.6°F]DB/ 6°C[42.8°F]WB
                     • Interconnecting Piping Length 7.5m(24.6ft)
                     • Level Difference of Zero

2. Capacities are net capacities
3. Due to our policy of innovation some specifications may be changed without prior notification
4. To be added for more available Models
5. EEV : Electronic Expansion Valve
6. Noise Level is Standard Mode

(for actual High Mode(factory set) condition, Noise Level may exceed the standard level by 1.5dBA)

Conversion Formula

kcal/h= kW x 860
Btu/h = kW x 3 412
CFM = m

3

/min x 35.3

l/s = CMM x 1 000/60 

Type

Ceiling Concealed Duct -Middle Static  

Model

Unit  

ARNU153M2A4

ARNU183M2A4 ARNU243M2A4

Cooling Capacity  

kW  

kcal/h  

Btu/h  

Heating Capacity  

kW  

kcal/h  

Btu/h  

Power Input

Nominal W
Rated W

Casing  

Dimensions

(WxHxD)

Body  

mm  

inch  

Coil  

Rows x Columns x FPI  
Face Area  

m

(ft

2

Fan  

Type  
Motor Output x Number  

W  

Running Current  

A  

Air Flow Rate(H / M / L)

(High Mode-Factory Set)
External static pressure  

CMM  

CFM  

mmAq(Pa)

Air Flow Rate(H / M / L)

(Standard mode)
External static Pressure

CMM  

CFM  

mmAq(Pa)

Drive  
Motor type  

Temperature Control  

Sound Absorbing Thermal Insulation Material  

Air Filter 

Safety Device  

Pipe Connections  

Liquid Side  

mm(inch)  

Gas Side  

mm(inch)  

Drain Pipe(Internal Dia.)  

mm(inch)  

Net Weight  

Body  

kg(lbs)  

Sound Pressure Levels (H / M / L)

dB(A)

Sound Power Levels (H / M / L)

dB(A)

Power Supply  

Ø, V, Hz  

Refrigerant Control   
Transmission Cable (AWG# -C)

4.5

3 900

15 400

5

4 300

17 100

33

430

Galvanized Steel Plate

1 250 × 270 × 700

49-7/32 x 10-5/8 x 27-9/16

2 x 13 x 18

0.27(2.91)

Sirocco Fan

350 x 1

2.3

14.8 / 10.2 / 7.4

523 / 360 / 261

6(59)

14.8 / 10.2 / 7.4

523 / 360 / 261

5(49)

Direct
BLDC

Microprocessor, Thermostat

for cooling and heating  

Foamed polystrene 

-

Fuse

Ø6.35(1/4)
Ø12.7(1/2)

25(1)

37.6(83)

38 / 37 / 36
53 / 53 / 52

1, 208-230, 60

EEV

AWG 18 x 2C

5.6

4 800

19 100

6.3

5 400

21 500

50

430

Galvanized Steel Plate

1 250 × 270 × 700

49-7/32 x 10-5/8 x 27-9/16

2 x 13 x 18

0.27(2.91)

Sirocco Fan

350 x 1

2.3

18.5 / 14.8 / 10.2

653 / 523 / 360

6(59)

18.5 / 14.8 / 10.2

653 / 523 / 360

5(49)

Direct
BLDC

Microprocessor, Thermostat

for cooling and heating  

Foamed polystrene 

-

Fuse

Ø6.35(1/4)
Ø12.7(1/2)

25(1)

37.6(83)

39 / 38 / 37
54 / 53 / 53

1, 208-230, 60

EEV

AWG 18 x 2C

7.1

6 100

24 200

8

6 900

27 300

50

430

Galvanized Steel Plate

1 250 × 270 × 700

49-7/32 x 10-5/8 x 27-9/16

2 x 13 x 18

0.27(2.91)

Sirocco Fan

350 x 1

2.3

18.5 / 14.8 / 10.2

653 / 523 / 360

6(59)

18.5 / 14.8 / 10.2

653 / 523 / 360

5(49)

Direct
BLDC

Microprocessor, Thermostat

for cooling and heating  

Foamed polystrene 

-

Fuse

Ø9.52(3/8)

Ø15.88(5/8)

25(1)

37.6(83)

39 / 38 / 37
54 / 53 / 53

1, 208-230, 60

EEV

AWG 18 x 2C


background image

Type

Ceiling Concealed Duct -Middle Static  

Model

Unit  

ARNU283M2A4 ARNU363M2A4 ARNU423M2A4 

Cooling Capacity  

kW  

kcal/h  

Btu/h  

Heating Capacity  

kW  

kcal/h  

Btu/h  

Power Input

Nominal W
Rated W

Casing  

Dimensions

(WxHxD)

Body  

mm  

inch  

Coil  

Rows x Columns x FPI  
Face Area  

m

(ft

2

Fan  

Type  
Motor Output x Number  

W  

Running Current  

A  

Air Flow Rate(H / M / L)

(High Mode-Factory Set)
External static pressure  

CMM  

CFM  

mmAq(Pa)

Air Flow Rate(H / M / L)

(Standard mode)
External static Pressure

CMM  

CFM  

mmAq(Pa)

Drive  
Motor type  

Temperature Control  

Sound Absorbing Thermal Insulation Material  

Air Filter 

Safety Device  

Pipe Connections  

Liquid Side  

mm(inch)  

Gas Side  

mm(inch)  

Drain Pipe(Internal Dia.)  

mm(inch)  

Net Weight  

Body  

kg(lbs)  

Sound Pressure Levels (H / M / L)

dB(A)

Sound Power Levels (H / M / L)

dB(A)

Power Supply  

Ø, V, Hz  

Refrigerant Control   
Transmission Cable (AWG# -C)

- 4 -

Copyright © 2018 LG Electronics Inc. 
All rights reserved. Only training and service purposes.

8.2

7 100

28 000

9.2

8 000

31 500

123
430

Galvanized Steel Plate

1 250 × 270 × 700

49-7/32 x 10-5/8 x 27-9/16

3 x 13 x 18

0.27(2.91)

Sirocco Fan

350 x 1

2.3

28.0 / 24.0 / 21.0

989 /848 / 742

6(59)

28.0 / 24.0 / 21.0

989 /848 / 742

5(49)

Direct
BLDC

Microprocessor, Thermostat

for cooling and heating  

Foamed polystrene 

-

Fuse

Ø9.52(3/8)

Ø15.88(5/8)

25(1)

39.1(86)

40 / 39 / 37
64 / 61 / 57

1, 208-230, 60

EEV

AWG 18 x 2C

10.6

9 100

36 200

11.9

10 200
40 600

184
430

Galvanized Steel Plate

1 250 × 270 × 700

49-7/32 x 10-5/8 x 27-9/16

3 x 13 x 18

0.27(2.91)

Sirocco Fan

350 x 1

2.3

28.0 / 24.0 / 21.0

989 / 848 / 742

6(59)

28.0 / 24.0 / 21.0

989 / 848 / 742

5(49)

Direct
BLDC

Microprocessor, Thermostat

for cooling and heating  

Foamed polystrene 

-

Fuse

Ø9.52(3/8)

Ø15.88(5/8)

25(1)

39.1(86)

42 / 40 / 38
65 / 62 / 60

1, 208-230, 60

EEV

AWG 18 x 2C

12.3

10 600
42 000

13.8

11 800
47 000

231
430

Galvanized Steel Plate

1 250 × 270 × 700

49-7/32 x 10-5/8 x 27-9/16

3 x 13 x 18

0.27(2.91)

Sirocco Fan

350 x 1

2.3

38.0 / 33.0 / 28.0

1 342 / 1 165 / 989

6(59)

38.0 / 33.0 / 28.0

1 342 / 1 165 / 989

5(49)

Direct
BLDC

Microprocessor, Thermostat

for cooling and heating  

Foamed polystrene 

-

Fuse

Ø9.52(3/8)

Ø15.88(5/8)

25(1)

39.1(86)

44 / 43 / 40
66 / 65 / 63

1, 208-230, 60

EEV

AWG 18 x 2C

Notes:-

1. Capacities are based on the following conditions:

     Cooling    • Indoor temp. 27°C[80.6°F]DB/ 19°C[66.2°F]WB

                     • Outdoor temp. 35°C[95°F]DB/ 24°C[75.2°F]WB
                     • Interconnecting Piping Length 7.5m(24.6ft)
                     • Level Difference of Zero

     Heating    • Indoor temp. 20°C[68°F]DB/ 15°C[59°F]WB

                     • Outdoor temp. 7°C[44.6°F]DB/ 6°C[42.8°F]WB
                     • Interconnecting Piping Length 7.5m(24.6ft)
                     • Level Difference of Zero

2. Capacities are net capacities
3. Due to our policy of innovation some specifications may be changed without prior notification
4. To be added for more available Models
5. EEV : Electronic Expansion Valve
6. Noise Level is Standard Mode

(for actual High Mode(factory set) condition, Noise Level may exceed the standard level by 1.5dBA)

Conversion Formula

kcal/h= kW x 860
Btu/h = kW x 3412
CFM = m

3

/min x 35.3

l/s = CMM x 1 000/60 


background image

Type

Ceiling Concealed Duct -Middle Static  

Model

Unit  

ARNU283M3A4 ARNU363M3A4 ARNU423M3A4 

Cooling Capacity  

kW  

kcal/h  

Btu/h  

Heating Capacity  

kW  

kcal/h  

Btu/h  

Power Input

Nominal W
Rated W

Casing  

Dimensions

(WxHxD)

Body  

mm  

inch  

Coil  

Rows x Columns x FPI  
Face Area  

m

(ft

2

Fan  

Type  
Motor Output x Number  

W  

Running Current  

A  

Air Flow Rate(H / M / L)

(High Mode-Factory Set)
External static pressure  

CMM  

CFM  

mmAq(Pa)

Air Flow Rate(H / M / L)

(Standard mode)
External static Pressure

CMM  

CFM  

mmAq(Pa)

Drive  
Motor type  

Temperature Control  

Sound Absorbing Thermal Insulation Material  

Air Filter 

Safety Device  

Pipe Connections  

Liquid Side  

mm(inch)  

Gas Side  

mm(inch)  

Drain Pipe(Internal Dia.)  

mm(inch)  

Net Weight  

Body  

kg(lbs)  

Sound Pressure Levels (H / M / L)

dB(A)

Sound Power Levels (H / M / L)

dB(A)

Power Supply  

Ø, V, Hz  

Refrigerant Control   
Transmission Cable (AWG# -C)

- 5 -

Copyright © 2018 LG Electronics Inc. 
All rights reserved. Only training and service purposes.

8.2

7 100

28 000

9.2

8 000

31 500

97

650

Galvanized Steel Plate

1 250 × 360 × 700

49-7/32 x 14-3/16 x 27-9/16

3 x 16 x 18

0.32(3.44)

Sirocco Fan

500 x 1

2.5

35.5 / 30.6 / 26.2

1 254 / 1 081 / 925

6(59)

35.5 / 30.6 / 26.2

1 254 / 1 081 / 925

5(49)

Direct
BLDC

Microprocessor, Thermostat

for cooling and heating  

Foamed polystyrene 

-

Fuse

Ø9.52(3/8)

Ø15.88(5/8)

25(1)

43.6(96)

40 / 39 / 37
64 / 62 / 61

1, 208-230, 60

EEV

AWG 18 x 2C

10.6

9 100

36 200

11.9

10 200
40 600

109
650

Galvanized Steel Plate

1 250 × 360 × 700

49-7/32 x 14-3/16 x 27-9/16

3 x 16 x 18

0.32(3.44)

Sirocco Fan

500 x 1

2.5

38.4 / 33.1 / 26.7

1 357 / 1 170 / 943

6(59)

38.4 / 33.1 / 26.7

1 357 / 1 170 / 943

5(49)

Direct
BLDC

Microprocessor, Thermostat

for cooling and heating  

Foamed polystyrene 

-

Fuse

Ø9.52(3/8)

Ø15.88(5/8)

25(1)

43.6(96)

41 / 39 / 37
65 / 63 / 61

1, 208-230, 60

EEV

AWG 18 x 2C

12.3

10 600
42 000

13.8

11 800
47 000

109
650

Galvanized Steel Plate

1 250 × 360 × 700

49-7/32 x 14-3/16 x 27-9/16

3 x 16 x 18

0.32(3.44)

Sirocco Fan

500 x 1

2.5

38.4 / 33.1 / 26.7

1 357 / 1 170 / 943

6(59)

38.4 / 33.1 / 26.7

1 357 / 1 170 / 943

5(49)

Direct
BLDC

Microprocessor, Thermostat

for cooling and heating  

Foamed polystyrene 

-

Fuse

Ø9.52(3/8)

Ø15.88(5/8)

25(1)

43.6(96)

41 / 39 / 37
65 / 63 / 61

1, 208-230, 60

EEV

AWG 18 x 2C

Notes:-

1. Capacities are based on the following conditions:

     Cooling    • Indoor temp. 27°C[80.6°F]DB/ 19°C[66.2°F]WB

                     • Outdoor temp. 35°C[95°F]DB/ 24°C[75.2°F]WB
                     • Interconnecting Piping Length 7.5m(24.6ft)
                     • Level Difference of Zero

     Heating    • Indoor temp. 20°C[68°F]DB/ 15°C[59°F]WB

                     • Outdoor temp. 7°C[44.6°F]DB/ 6°C[42.8°F]WB
                     • Interconnecting Piping Length 7.5m(24.6ft)
                     • Level Difference of Zero

2. Capacities are net capacities
3. Due to our policy of innovation some specifications may be changed without prior notification
4. To be added for more available Models
5. EEV : Electronic Expansion Valve
6. Noise Level is Standard Mode

(for actual High Mode(factory set) condition, Noise Level may exceed the standard level by 1.5dBA)

Conversion Formula

kcal/h= kW x 860
Btu/h = kW x 3412
CFM = m

3

/min x 35.3

l/s = CMM x 1 000/60 


background image

- 6 -

Copyright © 2018 LG Electronics Inc. 
All rights reserved. Only training and service purposes.

Type

Ceiling Concealed Duct -Middle Static  

Model

Unit  

ARNU483M3A4 ARNU543M3A4 

Cooling Capacity  

kW  

kcal/h  

Btu/h  

Heating Capacity  

kW  

kcal/h  

Btu/h  

Power Input

Nominal W
Rated W

Casing  

Dimensions (WxHxD)

Body  

mm  

inch  

Coil  

Rows x Columns x FPI  
Face Area  

m

(ft

2

Fan  

Type  
Motor Output x Number  

W  

Running Current  

A  

Air Flow Rate(H / M / L)

(High Mode-Factory Set)
External static pressure  

CMM  

CFM  

mmAq(Pa)

Air Flow Rate(H / M / L)

(Standard mode)
External static Pressure

CMM  

CFM  

mmAq(Pa)

Drive  
Motor type  

Temperature Control  

Sound Absorbing Thermal Insulation Material  

Air Filter 

Safety Device  

Pipe Connections  

Liquid Side  

mm(inch)  

Gas Side  

mm(inch)  

Drain Pipe(Internal Dia.)  

mm(inch)  

Net Weight  

Body  

kg(lbs)  

Sound Pressure Levels (H / M / L)

dB(A)

Sound Power Levels (H / M / L)

dB(A)

Power Supply  

Ø, V, Hz  

Refrigerant Control   
Transmission Cable (AWG# -C)

14.1

12 100
48 100

15.9

13 600
54 200

172
650

Galvanized Steel Plate

1 250 × 360 × 700

49-7/32 x 14-3/16 x 27-9/16

3 x 16 x 18

0.32(3.44)

Sirocco Fan

500 x 1

2.5

40.0 / 34.0 / 28.0

1 413 / 1 201 / 989

6(59)

40.0 / 34.0 / 28.0

1 413 / 1 201 / 989

5(49)

Direct
BLDC

Microprocessor, Thermostat for 

cooling and heating  

Foamed polystyrene 

-

Fuse

Ø9.52(3/8)

Ø15.88(5/8)

25(1)

43.6(96)

42 / 39 / 37
67 / 64 / 62

1, 208-230, 60

EEV

AWG 18 x 2C

15.8

13 600
54 000

18

15 500
61 400

260
650

Galvanized Steel Plate

1 250 × 360 × 700

49-7/32 x 14-3/16 x 27-9/16

3 x 16 x 18

0.32(3.44)

Sirocco Fan

500 x 1

2.5

50.0 / 45.0 / 40.0

1 766 / 1 589 / 1 413

6(59)

50.0 / 45.0 / 40.0

1 766 / 1 589 / 1 413

5(49)

Direct
BLDC

Microprocessor, Thermostat for 

cooling and heating  

Foamed polystyrene 

-

Fuse

Ø9.52(3/8)

Ø15.88(5/8)

25(1)

43.6(96)

44 / 43 / 42
69 / 68 / 67

1, 208-230, 60

EEV

AWG 18 x 2C

Notes:-

1. Capacities are based on the following conditions:

     Cooling    • Indoor temp. 27°C[80.6°F]DB/ 19°C[66.2°F]WB

                     • Outdoor temp. 35°C[95°F]DB/ 24°C[75.2°F]WB
                     • Interconnecting Piping Length 7.5m(24.6ft)
                     • Level Difference of Zero

     Heating    • Indoor temp. 20°C[68°F]DB/ 15°C[59°F]WB

                     • Outdoor temp. 7°C[44.6°F]DB/ 6°C[42.8°F]WB
                     • Interconnecting Piping Length 7.5m(24.6ft)
                     • Level Difference of Zero

2. Capacities are net capacities
3. Due to our policy of innovation some specifications may be changed without prior notification
4. To be added for more available Models
5. EEV : Electronic Expansion Valve
6. Noise Level is Standard Mode

(for actual High Mode(factory set) condition, Noise Level may exceed the standard level by 1.5dBA)

Conversion Formula

kcal/h= kW x 860
Btu/h = kW x 3412
CFM = m

3

/min x 35.3

l/s = CMM x 1 000/60 


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- 7 -

Copyright © 2018 LG Electronics Inc. 
All rights reserved. Only training and service purposes.

2. List of Functions

                                     Air supply outlet
                                     Airflow direction control(left & right)
                                     Airflow direction control(up & down)
                                     Auto swing(left & right)
 

Air flow

                        Auto swing(up & down)

                                     Airflow steps(fan/cool/heat)
                                     Chaos swing
                                     Chaos wind(auto wind)
                                     Jet cool(Power wind)
                                     Swirl wind
                                     Deodorizing filter
 Air purifying                 Plasma air purifier
                                     Prefilter(washable / anti-fungus)
                                     Drain pump
 

Installation

                  E.S.P. control

                                     Electric heater(operation)
                                     High ceiling operation
                                     Hot start
 Reliability                     Self diagnosis
                                     Soft dry operation
                                     Auto changeover
                                     Auto cleaning
                                     Auto operation(artificial intelligence)
                                     Auto restart operation
                                     Child lock
 Convenience               Forced operation
                                     Group control
                                     Sleep mode
                                     Timer(on/off)
                                     Timer(weekly)
                                     Two thermistor control
                                     Standard wired remote controller

                                        Wide Character wired remote controller

Picto wired remote controller

 Individual                     Deluxe wired remote controller
 control                         Simple wired remote controller
                                     Wired remote controller(for hotel use)
                                     Wireless remote controller(simple)
                                     Wireless LCD remote control

 Special

                        Zone control

 

function kit

                  CTIE

                                     Electro thermostat

1

-
-
-
-

3/3/3

-
-
-
-

X
X

O
O
O

X

-

O
O
O

O (Heat recovery only)

O

O (Heat pump or cooling only)

O
O

-

O
O
O
O
O

Accessory

Accessory

Accessory
Accessory
Accessory

X

Accessory
Accessory

-
-

Function

Category

ARNU073M2A4, ARNU093M2A4, ARNU123M2A4, ARNU153M2A4
ARNU183M2A4, ARNU243M2A4, ARNU283M2A4, ARNU363M2A4
ARNU423M2A4, ARNU283M3A4, ARNU363M3A4, ARNU423M3A4
ARNU483M3A4, ARNU543M3A4

O : Applied

X : Not applied

- : No relation

Option : Model name & price are different according to options, and assembled in factory with main unit.
Accessory : Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate

package.


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3. Piping Diagrams

[Unit : mm(inch)]

Refrigerant pipe connection port diameter

M2/M3 Chassis

Heat Exchanger

Sirocco Fan

Th3

Th1

Th2

lndoor unit

EEV

:Heating

:Cooling

Filter

Filter

LOC. 

Description 

PCB Connector (Color) 

Th1 

Thermistor for room air temperature 

CN-ROOM (Yellow) 

Th2 

Thermistor for pipe in temperature 

CN-PIPE_IN (White) 

Th3 

Thermistor for pipe out temperature 

CN-PIPE_OUT (Red) 

- 8 -

Copyright © 2018 LG Electronics Inc. 
All rights reserved. Only training and service purposes.

CHASSIS

MODEL

GAS

LIQUID

M2

ARNU073M2A4

Ø12.7(1/2)

Ø6.35(1/4)

ARNU093M2A4

Ø12.7(1/2)

Ø6.35(1/4)

ARNU123M2A4

Ø12.7(1/2)

Ø6.35(1/4)

ARNU153M2A4

Ø12.7(1/2)

Ø6.35(1/4)

ARNU183M2A4

Ø12.7(1/2)

Ø6.35(1/4)

ARNU243M2A4

Ø15.88(5/8)

Ø9.52(3/8)

ARNU283M2A4

Ø15.88(5/8)

Ø9.52(3/8)

ARNU363M2A4

Ø15.88(5/8)

Ø9.52(3/8)

ARNU423M2A4

Ø15.88(5/8)

Ø9.52(3/8)

M3

ARNU283M3A4

Ø15.88(5/8)

Ø9.52(3/8)

ARNU363M3A4

Ø15.88(5/8)

Ø9.52(3/8)

ARNU423M3A4

Ø15.88(5/8)

Ø9.52(3/8)

ARNU483M3A4

Ø15.88(5/8)

Ø9.52(3/8)

ARNU543M3A4

Ø15.88(5/8)

Ø9.52(3/8)


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- 9 -

Copyright © 2018 LG Electronics Inc. 
All rights reserved. Only training and service purposes.

M2 Chassis

M3 Chassis

4. Wiring Diagrams

CN_ROOM(YL)

 

CN_WF(BL)

CN_PIPE_IN(WH)

CN_PIPE_OUT(RD)

CN_HUMID(OR)

CN_AIRC(BL)

CN_REMO(GN)

CN_PTC(BL)

CN_MOTOR1(WH)

CN_ZONE(WH)

CN_DAMPER(GN)

CN_LEAK(VI)

CN_FLOAT(BL)

CN_EXT(BL)

CN_D_PUMP(WH)

CN_POWER(WH)

CN_CC

(WH)

CN_485(WH)

 

CN_OPTION

CN_DISPLAY(RD)

CN_EEV(WH)

 

CN_ROOM(YL)

 

CN_WF(BL)

CN_PIPE_IN(WH)

CN_PIPE_OUT(RD)

CN_HUMID(OR)

CN_AIRC(BL)

CN_REMO(GN)

CN_PTC(BL)

CN_MOTOR1(WH)

CN_ZONE(WH)

CN_DAMPER(GN)

CN_LEAK(VI)

CN_FLOAT(BL)

CN_EXT(BL)

CN_D_PUMP(WH)

CN_POWER(WH)

CN_CC

(WH)

CN_485(WH)

 

CN_OPTION

CN_DISPLAY(RD)

CN_EEV(WH)

 

 

CN_1(BL)

CN_1(BL)


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5. DIP Switch Setting

For Multi V Models, DIP switch 1, 2, 6, 8 must be set OFF.

                              Function                                  Description                                         Setting Off                              Setting On          Default

SW1

SW2

SW3

SW4

SW5

SW6

SW7

SW8

Communication

Cycle

Group Control

Dry Contact Mode

Installation

Heater linkage

Ventilator linkage

Vane selection
(Console)

Region selection

Etc.

N/A (Default)

N/A (Default)

Selection of Master or Slave

Selection of Dry Contact
Mode

Fan continuous operation

N/A

Selection of Ventilator 
linkage

Selection of up/down side
Vane

Selection tropical region

Spare

-

-

Master

Wired/Wireless remote 

controller

Selection of Manual or Auto

operation Mode

Continuous operation Removall

-

Linkage Removal

Up side + Down side Vane

General model

-

-

-

Slave

Auto

-

-

Working

Up side Vane

Only

Tropical model

-

Off

Off

Off

Off

Off

Off

Off

Off

1. Indoor Unit

2. Outdoor Unit

In case that the products meet specific conditions, “Auto addressing” function can start automatically with the im-
proved speed by turning the DIP switch #3 of the outdoor unit and resetting the power.

* Specific conditions:

- All names of the indoor units are ARNU****4.
- The serial number of Multi V super IV (outdoor units) is after October 2013.

DIP switch    7 segment

Outdoor Unit PCB

Outdoor Unit DIP Switch

- 10 -

Copyright © 2018 LG Electronics Inc. 
All rights reserved. Only training and service purposes.


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237204B

237204A

147901

137213B

137213A

237200

359012A

135501

159830

739209

73920A

352150B

W50010

W4030B

237205

237202

W4030A

137214

55211G

352118

W4810B

249951

349600A

349610B

359012B

346810

336600A

354210

268711D

261704

W6640A

268711A

268711C

263230B

263230C

137211

437213

263230A

739207

237203

349600B

349610A

336600B

W1JK

330871

W6640C

W4810D 

354212

158591

158580

266010


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237204A

137213A

147901

349610B

359012A

135501

349600B

159830

336600B

346810

336600A

349600A

W4810A

W4030B

359012B

237205

W4030A

237202

237203

739207

137214

354210

55211G

352118

249951

263230B

263230A

263230C

437213

137211

349610A

268711A

261704

W6640A

W6640C

268711D

W6640A

268711C

W50010

352150B

237200

W6640C

W1JK

237204B

137213B

W4810B

354212

739209

158591

158580

266010

73920A

330871

W4810D 


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- 13 -

Error Indicator

• This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.
• Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of

outdoor unit control board as shown in the table.

•  If more than two troubles occur simultaneously, lower number of error code is first displayed.
• After error occurrence, if error is released, error LED is also released simultaneously.

Error Display

- 1st,2nd,3rd LED of 7-segment indicates error number, 4th LED indicates unit number. Indicates unit number.

(* = 1:Master, 2 : Slave 1, 3 : Slave 2)

Ex) 211 : No.21 error of master unit

213 : No.21 error of slave2
1051 : No.105 error of master unit

h

Refer to the DX-Venitilation manual for DX-Venitilation error code

(repetition)

  

Error Compressor 

Error number 

Unit(1:Master, 2:Slave 1, 3:Slave 2)

7. Self-diagnosis function

Display

Title

Cause of Error

Indoor unit related error

0

1

-

Air temperature sensor of indoor unit

Air temperature sensor of indoor unit is open or short

0

2

-

Inlet pipe temperature sensor of indoor unit

Inlet pipe temperature sensor of indoor unit is open or short

0

3

-

Communication error : wired remote controller 

indoor unit

Failing to receive wired remote controller signal in indoor unit PCB

0

4

-

Drain pump

Malfunction of drain pump

0

5

-

Communication error : Indoor communication
PCB 

indoor unit

Indoor Unit PCB did not receive signal from Indoor 
communication PCB for over 3 minutes continuously

0

6

-

Outlet pipe temperature sensor of indoor unit

Outlet pipe temperature sensor of indoor unit is open or short

0

9

-

Indoor EEPROM Error

In case when the serial number marked on EEPROM of 
Indoor unit is 0 or FFFFFF

1

0

-

Poor fan motor operation

Disconnecting the fan motor connector / Failure of indoor 
fan motor lock

2

3

0

Refrigerant leakage sensing error

Refrigerant leakage sensing error and sensor defect error

2

3

7

Communication defect in indoor communication
PCB 

outdoor communication PCB

Indoor communication PCB did not receive signal from outdoor
communication PCB for over 3 minutes continuously

2

3

8

Communication error in outdoor communication
PCB 

outdoor unit

Outdoor communication PCB did not receive communication sig-
nal from outdoor unit for over 3 minutes continuously

Copyright © 2018 LG Electronics Inc. 
All rights reserved. Only training and service purposes.


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P/NO : MFL69041302

Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.