multi-v-3

Multi V

LG Air conditioning Academy

Air Conditioning Academy

Contents

1. Introduction1.1 What is Multi V?

1.2 External Appearance

1.3 System Layout

1.4 Nomenclature

2. Line Up2.1 Line Up

2.2 Specification

3. USP

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"""""""""""""""""""""""""".. 15

Copyright 2010 @LG Electronics / AC Company All Rights ReservedMulti V 2

3. USP3.1 Major USP

3.2 Minor USP

3.3 Product Comparison

3.4 Benefits

4. General Information4.1 Item Inside Product Box

."""""""""""""""""""""""""". 16

"""""""""""""""""""""""""".. 42

"""""""""""""""""""""""""".. 44

""""""""""""""""""".""""""". 52

"""""""""""""""""""""""""". 54

5. Product Details5.1 Cycle Diagram

5.2 Part & Dimensions

5.3 Control Parts

5.4 Wiring Diagram : Outdoor Unit

6. Installation6.1 Installation Scene

6.2 Installation of Outdoor Unit

6.3 Piping & Wiring: Outdoor Unit

6.4 System Set-up

7. Start up

Contents

"""""""""""""""""""""""""". 59

"""""""""""""""""""""""""".. 60

"""""""""""""""""""""""""".. 69

"""""""""""""""""""""""""". 97

"""""""""""""""""""""""""". 55

"""""""""""""""""""""""""".. 56

"""""""""""""""""""""""""".. 57

"""""""""""""""""""""""""". 58


7. Start up7.1 Start up

7.2 Checking point

7.3 Special Functions

8. Trouble Shooting8.1 Error Codes

9. New Functions9.1 Cool/ Heat selector

9.2 New Dry contact

9.3 Independent power module

"""""""""""""""""""""""""". 103

"""""""""""""""""""""""""".. 106

"""""""""""""""""""""""""".. 108

"""""""""""""""""""""""""". 121

"""""""""""""""""""""""""".. 123

"""""""""""""""""""""""""".. 126

"""""""""""""""""""""""""". 120

1.1 What is Multi V? 1. Introduction

Multi V III is the latest technology, with Worlds Best Efficiency, Largest Capacity,

Compact Design and Green Energy Solution.

Energy Saving & Environment Friendly

Wide & Free HVAC design

Multi V III


Easy Installation & Maintenance

Convenience and Comfort

UX1 Chassis (620 x 1680 x 760) UX2 Chassis (920 x 1680 x 760)

1.2 External Appearance 1. Introduction

3,380~415,50/60Hz


UX1 Chassis (620 x 1680 x 760) UX2 Chassis (920 x 1680 x 760)

UX3 Chassis (1240 x 1680 x 760) UX2 + UX2

Note: For the detailed capacity based combination, refer PDB.


3,380~415,50/60Hz

UX3 + UX2 UX3 + UX3



UX3 + UX2 UX3 + UX3

UX2 + UX2 + UX2 UX3 + UX2 + UX2


UX3 + UX3 + UX2 UX3 + UX3 + UX3

3,380~415,50/60Hz



UX3 + UX3 + UX2 UX3 + UX3 + UX3

UX3 + UX2 + UX2 + UX2 UX3 + UX3 + UX2 + UX2


UX3 + UX2 + UX3 + UX2

3,380~415,50/60Hz



UX3 + UX3 + UX3 + UX3

UX3 + UX2 + UX3 + UX2

TypeChassis Compressor No. Hex Row

H/P C/O H/P C/O H/P C/O

6HP - UX1 - 1 - 2

8HP UX2 UX1 1 1 2 2

10HP UX2 UX2 2 1 2 2

12HP UX2 UX2 2 2 2 2

14HP UX3 UX2 2 2 2 2

16HP UX3 UX3 3 2 2 2



16HP UX3 UX3 3 2 2 2

18HP UX3 UX3 3 3 2 2

20HP UX3 UX3 3 3 3 2

1.3 System Layout 1. Introduction

Combination of Maximum 64 Indoor Units

Max. 80 HP

Refrigerant Pipes


Console

ARTCOOL Gallery

ARTCOOL Mirror

High static duct

2Way CST

4Way CST

Low static duct

1Way CST

Y Branch

1.4.1 Outdoor Unit

1.4 Nomenclature 1. Introduction

Air Discharge Type

S : Side DischargeT : Top Discharge

Electrical rating8 : 3, 380 ~ 415V, 50Hz 9 : 3, 380V, 60HzA : 3, 220V, 50HZ B : 3, 220V, 60HZ

3

Serial number


A : 3, 220V, 50HZ B : 3, 220V, 60HZ

L : 3, 380 ~ 415V, 50Hz / 3, 380V, 60HzD : 3, 460V, 60Hz

Combination of Inverter Type andCooling Only or Heat PumpN : Inverter and H/P V : Inverter and C/OB : Inverter and Heat Recovery

Total cooling capacity in Horse Power (HP) unitEx) 10HP '100'

System withOutdoor Unit using R410A

1.4 Nomenclature

1.4.2 Indoor Unit

1. Introduction

Generation

Combinations of functionsA : Basic function

L : Neo Plasma (Wall Mounted)C : Plasma Ceiling Cassette)G : Low StaticU : Floor Standing without CaseART COOL Type Panel ColorB : Blue R : Mirror V : Silver


Electrical rating1 : 1, 115V, 60Hz 2 : 1, 220V, 60Hz6 : 1, 220 ~ 240V, 50HZ 7 : 1, 100V, 50/60HZ3 : 1, 208/230V, 60Hz

Combination of Inverter Type andCooling Only or Heat PumpN : AC Inverter and H/P V : AC Inverter and C/OB : DC Inverter and H/P and C/O

Total cooling capacity in Btu/h Ex) 5,000 Btu/h '05 ' 18,000 Btu/h ' 18'

System withIndoor Unit using R410A* LGETA : U Ex) URN

Chassis Name

2.1.1 Outdoor Unit

2.1 Line-up 2. Line-up

Capacity (HP)

C/O

56 58 6026 28 30 32 34 36 38 40 42 44 46 48 50 52 5422 2416 18 2010 12 146 8

H/P

S M L M+M L+M L+L M*3 L+M+M L+L+M L+L+L

M L M+M L+M L+L L+L+M L+L+L


L

M

SCapacity (HP)

C/O

76 78 8070 72 7464 66 6862

H/P

UX1

Chassis

UX2

Chassis

UX3

Chassis

L+M*3 L+L+M+M L+L+L+M L+L+L+L

L+L+L+L

2.1.2 Indoor Unit

2.1 Line-up 2. Line-up

7k 9k 12k 15k 18k 24k 28k 36k 42k 48k

2.2 2.8 3.6 4.2 5.6 7.1 8.2 10.6 12.3 14.1

5k

1.6

Btu/h

kW

ART COOLSeries

SRAC

CeilingCassette

Mirror

Ceiling & Floor

Wall Mounted

1Way (Art)

2Way

4Way

Gallery

76k 96k

23.9 30.2


CeilingConcealedDuct

FloorStanding

Ceiling & Floor

Ceiling Suspended

High Static

Low Static

Built-in

With Case

Without Case

Console

Fresh air Intake

2.2 Specification 2. Line-up

Unit 1 Outdoor Unit

System (HP) 6 8 10 12

ModelCombination unit ARUN60LT3 ARUN80LT3 ARUN100LT3 ARUN120LT3

Independent unit ARUN60LT3 ARUN80LT3 ARUN100LT3 ARUN120LT3

Product Charge kg 4.0 5.0 6.4 6.7

Max. Connectable No. Of Indoor Units

10 13 16 20

Net Weight kg 160 1 190 1 240 1 240 1

Dimensions

(WxHxD)

mm (618X1,680X760)X1 (920X1,680X760)X1 (920X1,680X760)X1 (920X1,680X760)X1

inch (26.8X66.1X29.9)X1 (36.2X66.1X29.9)X1 (36.2X66.1X29.9)X1 (36.2X66.1X29.9)X1

Connecting

Pipes

Liquid Pipes [mm (inch)]

9.52(3/8) 9.52(3/8) 9.52(3/8) 12.7(1/2)

Gas Pipes

[mm (inch)]19.05(3/4) 19.05(3/4) 22.2(7/8) 28.58(1-1/8)


[mm (inch)]19.05(3/4) 19.05(3/4) 22.2(7/8) 28.58(1-1/8)

Unit 1 Outdoor Unit

System (HP) 14 16 18 20

ModelCombination unit ARUN140LT3 ARUN160LT3 ARUN180LT3 ARUN200LT3

Independent unit ARUN140LT3 ARUN160LT3 ARUN180LT3 ARUN200LT3

Product Charge kg 7.0 7.5 7.5 9.0

Max. Connectable No. Of Indoor Units

23 26 29 32

Net Weight kg 270 1 340 1 340 1 350 1

Dimensions

(WxHxD)

mm (1,240X1,680X760)X1 (1,240X1,680X760)X1 (1,240X1,680X760)X1 (1,240X1,680X760)X1

inch (48.8X66.1X29.9)X1 (48.8X66.1X29.9)X1 (48.8X66.1X29.9)X1 (48.8X66.1X29.9)X1

Connecting

Pipes

Liquid Pipes [mm (inch)]

12.7(1/2) 12.7(1/2) 15.88(5/8) 15.88(5/8)

Gas Pipes

[mm (inch)]28.58(1-1/8) 28.58(1-1/8) 28.58(1-1/8) 28.58(1-1/8)

Note: Refer PDB for entire specifications of all the models.

Worlds Best COP-. Cooling : 4.13-. Heating : 4.55

High static

propeller fan

BLDC

Inverter Fan Motor

Heat Pump model (14HP)

COP Comparison

25%

4.25

4.25

4.25

4.25

4.13

9%

4.55

Cooling Capacity Heating Capacity

3.1 Main USP

3.1.1 Worlds Best COP

3. USP

Copyright 2010 @LG Electronics / AC Company All Rights ReservedMulti V 163/36

3.31

Conventional

BLDC

inverter compressor

New refrigerant

distributor

Sine wave

inverter control

Cyclone

sub-cool circuit Wide Louver fin in

Heat Exchanger

25%

4.16Conventional

9%

Multi V III Multi V III

Increased COP by 11% through new HSS Scroll Compressor

111%

100%

Compressor (COP)Old New

Suction

Discharge

HP

Suction

Discharge

HP

Oil Guide

Hi-EER

Scroll Profile

3.1 Main USP 3. USP

3.1.2 HSS Scroll Compressor


HSS Compressor

High Temp. High Press. Sump

no change in Suction Gas Temp.

no change in Oil Viscosity

(Stable Discharge Temp.)

LSS Compressor

Low temp. Low Press. Sump

Increase in Suction Gas Temp.

Oil Viscosity decreases with Temp.

Old New

65%

15%

9%

11%

65%

6%

5.5%

11%

100%

88%

Compressor

Leakage

Friction

Motor

Old New

Shaft

HSS Compressor

LP

LSS Compressor

Oil skirt

B/Weight

Input Power

Wide range Inverter

30% improved COP

3

33

3

4

44

4

5

55

5

6

66

6

24

24 24

24 25

25 25

25 26

26 26

26 27

27 27

27 28

28 28

28 29

29 29

29 30

30 30

30 31

31 31

31 32

32 32

32 33

33 33

33 34

34 34

34

35

35 35

35

Cooling

Standard

3.1 Main USP 3. USP

3.1.3 Wide Range Inverter Hz Control

105

120

15Hz

C

o

m

p

.

F

r

e

q

.

Multi V Plus II

Multi V III

COP


Outdoor temp.()

1

11

1

2

22

2

3

33

3

4

44

4

5

55

5

-

--

-15

1515

15-

--

-12

1212

12-

--

-10

1010

10 -

--

-7

77

7 -

--

-5

55

5 -

--

-3

33

3 0

0 0

0 3

3 3

3 5

5 5

5 7

7 7

7 9

9 9

9 11

11 11

11

Outdoor temp.()

HeatingStandard

2025

5Hz

C

o

m

p

.

F

r

e

q

.

Multi V Plus II Multi V III

Multi V III

Multi V Plus II

COP

3.1.4 HiPORTM Technology

CompressorOil

SeparatorCompressor

OilSeparator

Multi V IIIConventional Model

3.1 Main USP 3. USP

HiPORTM Technology Capacity Up, Increased COP


5/36

HiPOR TM

Loss due to the Bypass of Refrigerant. No Loss due to the Bypass of Refrigerant. COP increased by 3%

3.1.5 V Scroll Inverter Compressor

Nd Magnet

3.1 Main USP 3. USP

Powerful Magnets & Smooth Sine Wave DC Inverter


By adoption of the Sine

Wave which smoothes rotation of motor,

Operation efficiency is improved sharply.

Rotor

Steel Plates

Nd Magnet : Neodymium Magnet (NdFeB Magnet)

Worlds Longest Piping Length and Highest Elevation Difference

3.1 Main USP 3. USP

3.1.6 New Sub-cooling Circuit


Cyclone Sub-cooler

3.1 Main USP 3. USP

3.1.7 New Optimized Refrigerant Distributor

Non-uniform

Distribution

Uniform

Distribution

Standard Deviation of Pipe

Discharge temp.


Multi V III

R410A Refrigerant Refrigerant Recovery and Reuse

R12 R22 R134A R407C R410A

3.1 Main USP 3. USP

3.1.8 Eco-friendly


Leak-proof Design & Production Carbon Dioxide Reduction

Chiller+

Gas boilerMulti V

Multi V

Single RAC

+Oil boiler

Total CO2 in Korea (millimolar concentration mmol/l)

TCO2 Total CO2

Total piping length

Actual longest piping length

(Equivalent)

Longest piping length after 1st ranch

(Conditional application)

Level difference between ODU~IDU

Level difference between IDU~IDU

Level difference between ODU~ODU

1000m

200m

(225m)

40m

(90m)

110m

15m

5m

3.1 Main USP 3. USP

3.1.9 Extended Piping

Longest

piping

length

Max 225m

Total piping length

Max 1000m

Level

difference

between

ODU-IDU

Max 110m

Comparison with Competitors


Multi V D M

Longest piping length 200(E225)165

(E190)

165

(E190)

Total piping length 1,000 1,000 1,000

Height

ODU Upper 110 50(90) 50

ODU lower 110 40(90) 40

After 1st Branch Max 90 90 40

Level different IDU-IDU 15 15 15

Level diff

between

IDU-IDU

Max 15m

ODU : Outdoor Unit

IDU : Indoor Unit

: Equivalent

Longest

piping

length

after 1st

branch

Max 90m

New Designs for low operation noise

3.1 Main USP 3. USP

3.1.10 Low Noise

Robust Structure Design

New Octagon Grill

Air Flow Resistance reduced


Low torque ripple design of motor, resonant

frequency shift, optimal current angle control

Robust & S-shape Blade

New Design

Pitch Angle Increased

New Shroud

Bell Mouth Shape Expansion

(Max 6 8mmAq)

3.1 Main USP 3. USP

3.1.11 High Static Pressure Fan


Multi V IIIConventional

3.1.12 Wide Operation Range & Anti-corrosion Gold Fin

Wide Operation Range

3.1 Main USP 3. USP


Anti-corrosion Gold Fin

Multi V III Multi V III

Free Connection with Various Indoor Units

- Building Load simulation

3.1 Main USP 3. USP

3.1.13 Free Connection

*


*Variable Building load during day

3.1 Main USP 3. USP

3.1.14 Slope Bending Hex


20mm 20mmSlope bending Hex

3.1.15 Automatic Functions

Automatic Emergency Back-up Automatic Wrong Connection Detection

3.1 Main USP 3. USP

Malfunction Back-up

Wrong piping

Wrong wiring


Automatic Fault Detection Automatic Refrigerant Charging

Wrong wiring

3.1 Main USP 3. USP

3.1.16 Continuous Heating

Conventional

Multi V III Conventional

Multi V III


Multi V IIIConventional Multi V IIIConventional Multi V IIIConventional

3.1 Main USP 3. USP

3.1.17 Fast Cooling / Heating

Comparison of time taken to

reach the set temp.

Conventional


Multi V III

100

50

Max Indoor Temp.Capacity(%)

Load(%)

A hrMeasuring

Temp.

B hrFunction

On

Low Outdoor Fan Noise at Night in Cooling & Heating Mode

3.1 Main USP 3. USP

3.1.18 Night Silent Operation


0

50

41

12:008:00 16:00 20:00 0:00 4:00 8:00

Mode start Mode End

Load SPL

(db)

Step 3 : max C

47

Step 1 : max AMode 1 A : 8.0 hr, B : 9.0 hr

Mode 2 A : 6.5 hr, B : 10.5 hr

Mode 3 A : 5.0 hr, B : 12.0 hr

Step 2 : max B

Real-Time Energy Saving Operation

3.1 Main USP 3. USP

3.1.19 Real Time Operation


Capability Compensation Operation

3. USP

3.1.20 Space Saving

Comparison of Outdoor Unit Installation Space

3.1 Main USP


Fork Lift Slot

3.1 Main USP 3. USP

3.1.21 Easy and Safe Transportation


Elevator

Crane Slot

4way Piping Connection & Front SVC Area Decreased

3.1 Main USP 3. USP

3.1.22 Easy Installation and SVC

Multi V IIIMulti V Plus II


Front SVC Area

900C/Box Open area

500SVC Area

50%

Old Test Run

Auto Test Run

3hrs

1hr

60%

Time

save

Test Run Time Save

Setting LGMV PC 100% operation 1 Unit operation Report

3.1 Main USP 3. USP

3.1.23 Auto Test Run


1hr Test Run Time SaveStart Report

Auto Test Run Check List

Cycle

Electric

Ref. charging

Sensor check

Parts (s/w, valves, etc.)

LGMV

When Indoor units are failed, all the refrigerant in IDU can be pumped down to Outdoor unit.

Repair!

Refrigerant Flow

Pump Down

3.1 Main USP 3. USP

3.1.24 Pump Down and Pump Out


When Outdoor unit is failed, all refrigerant in failed ODU can be pumped out to Indoor Units.

Failed

Refrigerant Flow

Refrigerant Flow

Pump Out

Easy Monitoring & Control Through LG MV Program

3.1 Main USP 3. USP

3.1.25 LGMV


Cycle View Indoor controlLG MV Cycle View

3. USP

User-setting Auto Changeover Mode Override (Master / Slave)

Master

Slave

Slave

3.1.26 Network Solution

3.1 Main USP


Free Access of Group control Indoor Control

- Each IDU Lock Function

- Each IDU Temp. Range Setting

Capacity Comparison for Single Unit

D Company M CompanyMulti V III

3.2 Minor USP 3. USP

3.2.1 Largest Single Unit Capacity

Series 3333 3333 3333


Unit Capacity

1 Unit Max

Max Combination

3.2 Minor USP 3. USP

3.2.2 Largest Combination Capacity with Single Pipe


Line-up

6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 64 80

1unit 3unit2unit 4unit

Multi V

VRV

Plus

LG

Daikin

3.3.1 Line-up & Foot Print Size

3.3 Product Comparison 3. USP


City MultiM.E

Foot

Print

SIZE

24/36

Plus II

Multi V III

0.0

1.0

2.0

3.0

4.0

5

6 8

1

0

1

2

1

4

1

6

1

8

2

0

2

2

2

4

2

6

2

8

3

0

3

2

3

4

3

6

3

8

4

0

4

2

4

4

4

6

4

8

5

0

5

2

5

4

5

6

5

8

6

0

6

2

6

4

6

6

6

8

7

0

7

2

7

4

7

6

7

8

8

0

m

2 Plus II

Multi V III

Daikin

ME

Item Multi V VRV City Multi

Max. COP

(Cooling / Heating)4.27 / 4.58 4.29 / 4.50 3.62 / 4.02

Longest Pipe Length

200 m 200 m 165 m

Total Pipe Length 1,000 m 1,000 m 1,000 m

3.3.2 Key Specifications



Difference in height

(Indoor Outdoor)110m 50 m(90 m) 50 m

Control Inv. + Const. Speed Inv. + Const. Speed Inverter

1Unit Max Capacity 20 HP 18 Hp 18 Hp

Outdoor Max Capacity

Max 80Hp Max 54 Hp Max 50 Hp

CompressorV-Scroll(DC Inverter)

Hi-POR tech.

DC Inverter

Scroll type

DC Inverter

Scroll type

25/36

4.16

4.55

3.98

3.72

3.314.13

3.23

3.57

3.3.3 COP



Multi V III Multi V Plus II VRV City Multi

26/36

3.3.4 COP at Part Loads


Cooling Capacity (14 HP at Standard Condition)

5.5

29%

4.5

5


Operating Rate [%]

27/36

C

O

P

Multi V IIIMulti V IIIMulti V IIIMulti V III

40 50 60 70 80 90 100 110

Multi V III VRV III DVM III

2

2.5

3

3.527%

4

3.3.5 COP along Total Capacity Range


C

O

P

3.50

4.00

4.50


This data is based upon EPDB

28/36

C

O

P

Capacity [Hp]

2.00

2.50

3.00

0 10 20 30 40 50 60 70 80

Multi V III_50Hz Multi V Plus II_50Hz Daikin VRV III ss_50Hz

ME City Multi_50Hz/60Hz Toshiba SMMS_50/60Hz Samsung (Compact Model (50Hz)

Purpose : Office

Area : 10,827 ft2

Location : Sacramento, California

- Outdoor Temperature : -1 ~ 38

Sample Building case study

3.3.6 Power Consumption


30

15%

Cooling

Operating range10

15

20

25

70 80 90 100 110 120

Temperature [F]

P

o

w

e

r

c

o

n

s

u

m

p

t

i

o

n

[

k

W

]


- Outdoor Temperature : -1 ~ 38

HVAC system

- LG Multi V III, 26HP 2each

- DAIKIN VRV III, 26HP 2each

Energy simulation : Energy Pro Ver.5.0

29/36

Temperature [F]

MV III Plus II VRV III

13%

Heating

Operating range

10

15

20

25

30

10 20 30 40 50 60 70

Temperature [F]

P

o

w

e

r

c

o

n

s

u

m

p

t

i

o

n

[

k

W

]

MV III Plus II VRV III

143,510

134,391

125,319

14%

3.3.7 Annual Energy Consumption


9,000

11,000

13,000

15,000

E

n

e

r

g

y

C

o

n

s

u

m

p

t

i

o

n

[

k

W

h

]

Annual Energy Consumption can be reduced by 14%


125,319

VRV III Plus II MV III

30/36

1,000

3,000

5,000

7,000

9,000

Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec.

Month

E

n

e

r

g

y

C

o

n

s

u

m

p

t

i

o

n

[

k

W

h

]

Multi V Plus II VRV III Multi V III

Outdoor unit Multi V III VRV III City MultiItem

20 HP

No. of ODU

Foot print area

Weight

Max. Connecting IDU

No. of ODU

Foot print area40 HP

66.2% 100% 98.3%

82.0% 100% 93.7%

32 43

79.5% 100% 87.1%

87.1% 100% 84.0%Weight

32

3.3.8 Installation Parameters



50 HP

No. of ODU

Foot print area

No. of OD U

Foot print area54 HP

87.1% 100% 84.0%

99.3% 100% 97.7%

91.3% 100% 76.2%

99.3% 100%

98.8% 100%

Weight

Weight

Weight

Over 54Hp, only LG provides

Max. Connecting IDU 64 5064

Max. Connecting IDU 64 5064

Max. Connecting IDU 6464

Convenient model selection

Highly user-friendly design (Autocad Version)

Automatic piping design & check

Download & auto upgrade from Sales Supporting System(http://www.lgeaircon.com)

3.4.1 LATS - Multi V

3.4 Benefits 3. USP

Consultant


Easy start-up, Easy trouble shooting

Monitoring whole system such as compressor, fan, valves, etc

3.4.2 LG Monitoring Viewer (LGMV)

3.4 Benefits 3. USP

Installer


USBUSB

- Operation State - Indoor Controller - Cycle View

4.1 Item Inside Product Box

4.1.1. Indoor Box

4. General Information

1 Indoor Unit

2 Owners Manual

3 Installation Manual

4 Remote Controller

5 Screw

4.1.2. Outdoor Box

1 Outdoor Unit

2 Installation Manual


5.1.1 H/P Model

5.1 Cycle Diagram 5. Product Details

8HP (Cooling Operation)


Note: Refer PDB for diagrams all the models.

5.2 Dimensions 5. Product Details

ARUV60LT3

ARUV80LT3

Unit (mm)


(Pitch of Foundation bolt holes)

(

P

i

t

c

h

o

f

F

o

u

n

d

a

t

i

o

n

b

o

l

t

h

o

l

e

s

)

4 oblong holes

Note: Refer PDB for the dimensions of all the models.

5.3 Control Parts 5. Product Details

CN29CN29CN29CN29---- INV PCB Communication terminal

CN 33

SCSCSCSC---- ININININ---- SC circuit

SW02VSW02VSW02VSW02V---- Auto addressing switch

CN41CN41CN41CN41---- Central Control terminal

CN05CN05CN05CN05---- Jig connection terminal LGMV

CN04CN04CN04CN04---- On boarding terminal

CN38CN38CN38CN38---- ODU EEV- OutCN39CN39CN39CN39---- ODU EEV- INJCN40CN40CN40CN40---- SC EEV

CN44CN44CN44CN44---- INV comp HP S/WCN43CN43CN43CN43---- INV comp HP S/W 1

CN26CN26CN26CN26---- INV comp HP S/W 2

CN18CN18CN18CN18---- H/Gas 2

CN16CN16CN16CN16---- Oil Return

CN17CN17CN17CN17---- H/Gas 1CN36CN36CN36CN36---- PFC- IPM

SW01SSW01SSW01SSW01S----Reset button

CN15CN15CN15CN15---- Const comp magnetic switch 2


CN 35

HEXHEXHEXHEX---- ODU hex temp. sensorDIS(C)DIS(C)DIS(C)DIS(C)---- Const comp dis temp. sensor

CN 34

DIS(I)DIS(I)DIS(I)DIS(I)---- Inv comp dis temp.

SCSCSCSC---- OUTOUTOUTOUT---- SC circuit outlet temp. sensor

SUCSUCSUCSUC---- Suc temp. sensor

inlet temp. sensor

CN14CN14CN14CN14---- Const comp magnetic switch 1

CN13CN13CN13CN13---- Hot gas solenoid valve (main)

CN12CN12CN12CN12---- Const comp hearer 2

CN11CN11CN11CN11---- Const comp hearer 1CN10CN10CN10CN10---- INV comp hearer

CN09CN09CN09CN09---- 4 way reversing valve

CN08CN08CN08CN08---- 220V power input terminal

JIG1,JIG2JIG1,JIG2JIG1,JIG2JIG1,JIG2---- JIG power terminal : AC 220V

CN 28CN 28CN 28CN 28---- Const comp current sensor 1

CN 27CN 27CN 27CN 27---- Const comp current sensor 2

CN 31CN 31CN 31CN 31----Pressure sensor (Mid)

CN 32CN 32CN 32CN 32---- Low Pressure sensor

CN 30CN 30CN 30CN 30---- High Pressure sensor

IPMIPMIPMIPM

5.4 Wiring Diagram: Outdoor Unit 5. Product Details


6.1 Installation Scene 6. Installation

1Way CST

ARTCOOL Deluxe

Low static duct

ODU (max 80 HP)

Refrigerant Pipes

Y Branch


Floor standing

ARTCOOL standard

High static duct

2Way CST

4Way CST

6.2 Installation of Outdoor Unit 6. Installation

6.2.1 Installation Process



6.2.1 Installation Process

The vacuum pump must have the capacity to achieve vacuuming

pressure of 5 torr for more than 1 hour.

Fix facing panels


Note: Refer Installation Manual for more details.

Fix facing panels


6.2.2 Foundation

6. Installation

A) Fix the unit tightly with bolts as shown below so that unit will not fall down due to earthquake or gust.

Use the H-beam support as a base support

B) Noise and vibration may occur from the floor or wall since vibration is transferred through the installation part depending on installation status. Thus, use anti-vibration materials (cushion pad) fully (The base pad shall be more than 200mm).


Note: Refer PDB for more details.

C) The corner part must be fixed firmly. Otherwise, the

support for the installation may be bent.

- Get and use M10 Anchor bolt.

- Put Cushion Pad between the outdoor unit and ground

support for the vibration protection in wide area.

D) Space for pipes and wiring

(Pipes and wirings for bottom side)

E) H-beam support

F) Concrete support


6.2.3 Settlement of Outdoor Unit

6. Installation


Install at places where it can endure the weight and vibration/noise of the outdoor unit.

The outdoor unit supports at the bottom shall have width of at least 100mm under the unit legs

before being fixed.

The outdoor unit supports should have minimum height of 200mm.

Anchor bolts must be inserted at least 75mm.


6.2.4 Selection of Best Location

Select space for installing outdoor unit, which will meet the following conditions:

No direct thermal radiation from other heat sources

No possibility of annoying the neighbors by noise from unit

No exposition to strong wind

With strength which bears weight of unit

Note that drain flows out of unit when heating

With space for air passage and service work shown next.

Because of the possibility of fire, do not install the system to the space where generation, inflow, stagnation,

and leakage of combustible gas is expected.

Avoid unit installation in a place where acidic solution and spray (sulfur) are often used.

Do not use unit under any special environment where oil, steam and sulfuric gas exist.

6. Installation


Do not use unit under any special environment where oil, steam and sulfuric gas exist.

Don't operate heating mode when the outdoor air temperature is -20C or lower.

It is recommended to fence round the outdoor unit in order to prevent any person or animal from accessing

the outdoor unit.

If installation site is area of heavy snowfall, then the following directions should be observed.

- Make the foundation as high as possible.

-Fit a snow protection hood.

Select installation location considering following conditions to avoid bad condition when additionally

performing defrost operation.

1. Install the outdoor unit at a place well ventilated and having a lot of sunshine in case of installing the

product at a place with a high humidity in winter (near beach, coast, lake, etc).

(Ex) Rooftop where sunshine always shines.

2. Performance of heating will be reduced and preheat time of the indoor unit may be lengthened in case of

installing the outdoor unit in winter at following location:

(1) Shade position with a narrow space

(2) Location with much moisture in neighboring floor.

(3) Location with much humidity around.

(4) Location where ventilation is good.

It is recommended to install the outdoor unit at a place with a lot of sunshine as possible as.

.



6. Installation



During the installation of the unit, consider service, inlet, and outlet and acquire the minimum space as shown in the figures below.

Category Installation SpaceCase 1

(10mm Side Space 49mm)

Case 2

(Side Space 49mm)

A10

B300

C10

D500

A50

B100

C50

D500

A10

B300

C10

D500

A50

B100

C50

D 500



4 sides

are

walls

D500

E20

D 500

E100

A10

B300

C10

D500

E20

F600

A50

B100

C50

D 500

E100

F 500


6.2.5 Clearance Space

6. Installation

Category Installation SpaceCase 1

(10mm Side Space 49mm)

Case 2

(Side Space 49mm)

4 sides

are

walls

A10

B300

C10

D300

E20

F 500

A50

B100

C50

D 100

E100

F 500


Only

2 sides

are walls

No limit to the height

of the wall

A 10

B 300

A 200

B 300

E 400


Category Installation Space

Limitations on

the height of

the wall

The height of the wall on the front side must be 1500mm or less.

The height of the wall on the inlet side must be 500mm or less.

There is no limit to the wall on the side.

If the height of the walls on the front and the side are higher

than the

limit, there must be additional space on the front and the side.

- Additional Space on the inlet side by 1/2 of h1.

6.2.5 Clearance Space



the wall- Additional Space on the inlet side by 1/2 of h1.

- Additional Space on the front side by 1/2 of h2

- h1 = A (Actual height) - 1500

- h2 = B (Actual height) - 500

6.3 Piping & Wiring: Outdoor Unit 6. Installation

1. For High Low Pressure Common Pipe, use provided elbows to

connect between the outdoor units using pipes.

2. During the cutting of the pipes, remove burr, foreign substances

before connecting. Otherwise, the unit may not operate because

of the sludge inside the pipe.

3. Apply Nitrogen Gas of pressure until 3.8MPa(38.7kgf/cm2) for work

area leakage test.

4. After the degree of a vacuum reaches 5 torr, continue the vacuuming

6.3.1 Connecting Pipe to Outdoor Unit


work for more than 1 hour.

5. Open the side pole with hexagonal wrench.

When connecting to high low pressure common pipe, connect pipes using connecting elbows.

6. Installation

Outdoor Units Model Gas Pipe Liquid Pipe

2

Unit

ARCNN21

ID rId3 .

ID rId4 .

ID rId5 .




6. Installation

Outdoor Units Model Gas Pipe Liquid Pipe

3

Unit

ARCNN31



ID rId3 .

ID rId4 .

ID rId7 .


4

Unit

ARCNN41

ID rId5 .

ID rId6 .

ID rId8 .

6. Installation

Outdoor Unit

ARUN420LT3ARUN440LT3ARUN460LT3ARUN480LT3ARUN500LT3

ARUN520LT3ARUN540LT3ARUN560LT3ARUN580LT3ARUN600LT3




6. Installation

1 Outdoor Units

Example : 5 Indoor Units

connected

: Outdoor Unit

: 1st branch (Y branch)

: Indoor Units

Y branch method




6. Installation

2 Outdoor Units


connected

: Outdoor Unit


: Indoor Units

: Downward Indoor Unit

: Connection branch pipe

Y branch method





between Outdoor units:

ARCNN21

6. Installation

Refrigerant Pipe Connection : Y Branch Method

Piping length from outdoor branch to outdoor unit 10m, equivalent length : max 13m(for 22HP or more)

Conditional Application

To satisfy below condition to make 40m ~ 90m of pipe length after first branch.

Diameter of pipes between first branch and the last branch should be increased by one step,

except pipe diameter B,C,D is same as Diameter A

6.35 9.52 12.7 15.88 19.05 22.2 25.4 28.58 31.8 34.9




6.35 9.52 12.7 15.88 19.05 22.2 25.4 28.58 31.8 34.9 38.1

*: it is not necessary to size up.

2) While calculating whole refrigerant pipe length, pipe B,C,D length should be calculated twice.

A+B2+C2+D2+a+b+c+d+e 1,000m

3) Length of pipe from outdoor unit to the farthest indoor unit 5(abcd) 40m

4) [Length of pipe from outdoor unit to the farthest indoor unit 5(A + B + C + D + e)

-[Length of pipe outdoor unit to the closest indoor unit 1 (A + a) 40m


6. Installation

Header Method1 Outdoor Unit


connected

: Outdoor Unit

: 1st branch

: Indoor Units

: Sealed piping




6. Installation

Header Method2 Outdoor Unit


connected

: Outdoor Unit

: Header branch

: Indoor Units

: Sealing







ARCNN21

6. Installation

Refrigerant Pipe Connection : Header Method

LLongest pipe length *Equivalent pipe length

A+f 200m A+f 225m

lLongest pipe length after 1st branch

F 40m

Difference in height (Outdoor Unit Indoor Unit)




HDifference in height (Outdoor Unit Indoor Unit)

H 110m

HDifference in height (Indoor Unit Indoor Unit)

H 15m

h1Difference in height (Outdoor Unit Outdoor Unit)

H1 5m

*: Assume equivalent piping length of Y branch to be 0.5m, that of header to be 1m, calculation purpose


6. Installation

Combination of Y branch/header method 1 Outdoor Units


connected

: Outdoor Unit


: Y branch

: Indoor Unit

: Header




: Header

: Sealed piping

6. Installation

Combination of Y branch/header method 2 Outdoor Units


connected

: Outdoor Unit

: 1st branch

: Y branch

: Indoor Unit







ARCNN21

: Header

: Sealed piping

6. Installation

Refrigerant Pipe Connection : Y branch & Header Method

LLongest pipe length *Equivalent pipe length

A + B + b 150m(200m **) A + B + b 175(225m**)

lLongest pipe length after 1st branch

B + b 40m(90m**)

Total pipe length = A+B+C+a+b+c+d+e 1,000m




HDifference in height (Outdoor Unit Indoor Unit)

H 110m

hDifference in height (Indoor Unit Indoor Unit)

h 15m )

h1Difference in height ( Outdoor Unit Outdoor Unit)

h1 5m

* : Assume equivalent piping length of Y branch to be 0.5m, that of header to be 1m, calculation purpose

** : To apply Conditional Application


6. Installation

Refrigerant pipe diameter from branch to branch (B,C)




6. Installation

Y Branch selection

Models Gas pipe Liquid pipe

ARBLN01621

ID rId3 .

ID rId4 .




ARBLN03321

ARBLN07121

ID rId5 .

ID rId6 .

ID rId7 .

ID rId8 .

6. Installation

Y Branch selection


ARBLN14521

ID rId3 . ID rId4 .




ARBLN23220

ID rId5 . ID rId6 .

6. Installation


4 branch

ARBL054

Header Selection

ID rId3 . ID rId4 .

ID rId5 . ID rId6 .




7branch

ARBL057

4 branch

ARBL104

ID rId7 .

ID rId8 .

6. Installation


7 branch

ARBL107

Header Selection

ID rId3 .

ID rId4 .

ID rId5 .

ID rId6 .




10 branch

ARBL1010

10 branch

ARBL2010

ID rId7 .

ID rId8 .

6. Installation

The calculation of the additional charge should take into account the length of pipe and CF

(Correction Factor) value of indoor unit.

Additional charge (kg)Total liquid pipe

:25.4mm

Total liquid pipe

:22.2mm

Total liquid pipe

:22.2mm

=

+

+

0.480(kg/m)

0.354(kg/m)

0.266(kg/m)




Total liquid pipe

:15.88mm

Total liquid pipe

:12.7mm

Total liquid pipe

:6.35mm

CF value of indoor

unit

Total liquid pipe

:9.52mm

+

+

+

+

+

0.173(kg/m)

0.118(kg/m)

0.061(kg/m)

0.022(kg/m)

CF value of indoor unit

6. Installation

CF value of indoor unit Unit : kg




CAUTION

Use only 2-series of indoor unit. Ex) ARNU***2

6.3.2 Electrical Wiring

6. Installation

UX3 (Cooling Only)


Main PCB

Inverter Fan PCB

Noise Filter

Reactor

Bridge diode

Magnet switch


- Connect transmission line between main and sub outdoor unit through the terminal block.

- Connect transmission lines between outdoor unit and indoor/HR units through the terminal block.

- When the central control system is connected to the outdoor unit, a dedicated PCB must be connected

between them.

- When connecting transmission line between outdoor unit and indoor/HR units with shielded wire,

connect the shield ground to the earth screw

The temperature sensor for outdoor air should not be exposed to direct sunlight.

- Provide an appropriate cover to intercept direct sunlight.

Inverter PCB

Take care of the phase

sequences of 3-phase 4-wire

power system

1) Transmission cable

Types : shielding wire CVVS or CPEVS

Diameter : over 1.0~1.5 mm2

Insulation material : PVC

Maximum allowable temperature: 60C

Maximum allowable line length: under 1,000 m

2) Remote control cable

Types : 3-core cable

3) Simple central control cable

Types : 4-core cable (Shielding wire)

Wire Size : over 0.75mm2

6. Installation

6.3.2 Electrical Wiring



Wire Size : over 0.75mm2

4) Separation of transmission and power lines

If transmission and power lines are run alongside each other then there is a strong likelihood of operational

faults developing due to interference in the signal wiring caused by electrostatic and electromagnetic coupling.

The tables below indicates our recommendation as to appropriate spacing of transmission and power lines

where these are to be run side by side

The figures are based on assumed length of

parallel cabling up to 100m. For length in excess

of 100m the figures will have to be recalculated in

direct proportion to the additional length of line

involved.

Current capacity of power line Spacing

100V or more

10A 300mm

50A 500mm

100A 1,000mm

Exceed 100A 1,500mm

6. Installation

6.3.3 Electrical Characteristics

ID rId3 .

50 Hz (Heat Pump)



Note: Refer PDB for the electrical characteristics of all models.

6.3.4 Method of Connecting Power Cable

6. Installation

Power Source connected in series




6. Installation

Power Source Connected Individually

6.3.4 Method of Connecting Power Cable




6.3.5 Leakage Test

6. Installation

Leak test should be made by pressurizing nitrogen gas to 3.8 MPa(38.7kgf/cm2). If the pressure does not

drop for 24 hours, the system passes the test. If the pressure drops, check where the nitrogen leaks. For

the test method, refer to the following figure. (Make a test with the service valves closed. Be also sure to

pressurize liquid pipe, gas pipe and high/low pressure common pipe) The test result can be judged good if

the pressure has not be reduced after leaving for about one day after completion of nitrogen gas

pressurization.



6.3.6 Vacuum drying

6. Installation6.3 Piping & Wiring: Outdoor Unit


Note : Always add an appropriate amount of refrigerant. (For the refrigerant additional charge)

Too much or too little refrigerant will cause trouble.

To use the Vacuum Mode

(If the Vacuum mode is set, all valves of Indoor units and Outdoor units will be opened.)


This function is used for creating vacuum in the system after compressor replacement, ODU parts

replacement or IDU addition/replacement.

6.3.7 Vacuum Mode

6. Installation6.3 Piping & Wiring: Outdoor Unit


Caution: ODU operation stops during vacuum mode. Compressor can't operate.

6.4 System Set-up

6.4.1 DIP Switch Setting

6. Installation

Heat Pump (SVC PCB) Cooling Only (Main PCB)

(Auto

(Auto

Address)


(Auto

Address)

6.4 System Set-up 6. Installation

Checking according to dip switch setting

1. The setting values of the Master outdoor unit can be checked on the 7 segment LED.

The dip switch setting should be changed when the power is OFF.

2. It checks whether the input is properly performed without the bad contact of the dip switch or not.

Checking the setting of the Master unit

The number is sequentially appeared at the 7 segment in 5 seconds after applying the power. This

number represents the setting condition. (For example, represents R410A 30HP)

Master model code Slave1 model code Slave2 model code total capacity 2 25 150

1 ~255 : Master model code

1 ~255 : Slave1 model code Refer to table code

1 ~255 : Slave2 model code}

6.4.1 DIP Switch Setting


Note: For more information refer Installation Manual

and PDB.

6~80HP : HP number (sum of master capacity and slave capacity)

No display : cooling only 2 : heat pump 25 : normal 150 : Model Type(ARUNxxT3)

Example) 30Hp, R410A

16 15 30 2 25 150

Model Code Unit (HP) Unit Ref.

11 6

Master & Slave R410A

12 8

13 10

14 12

15 14

16 16

17 18

18 20

Model Code

CAUTION

Product may not properly operate if the relevant DIP switch is

not properly setup.


6.4.2 Setting the DIP Switches

Heat pump

If the Dip switch is set when power is on, the changed setting will not be applied immediately.

The changed setting will be enabled only when Power is reset or by pressing Reset button.

ID rId4 .


F

u

n

c

t

i

o

n



ID rId3 .

ID rId4 .

F

u

n

c

t

i

o

n


F

u

n

c

t

i

o

n



Cooling Only




Cooling Only

F

u

n

c

t

i

o

n


1. X mark means that the dip switch must be turned OFF. If not, the function may not work properly.

2. If the applicable dip switch is not set properly, the product may not work properly.

3. When executing the test operation, check the operating condition of the indoor unit and only execute the

operation when all indoor units are stopped.

4. Auto test operation function does not work for the product where only one indoor unit is connected for use.

5. Cooling Only model is not working on functions of Heat Pump model.

7.1 Start up 7. Start up

1. Installation information

-. Supervisors must check if the real installers name plate and piping diagram is attached on the outdoor unit.


2. Writing out the completion report

-. Installer should submit the report of installation completion to the building constructor.

The report should include the piping diagram, the cable construction, commissioning result, a test run, etc.


3. Refrigerant piping diagram

The refrigerant piping diagram can

make services more quickly and


make services more quickly and

correctly.

The refrigerant piping diagram is

certainly attached on the inside of the

outdoor unit in order to avoid the direct

sunlight.


The name plate includes an installer name, his store name, commissioner and added refrigerant amount.

It should be attached on the outdoor unit.

4. Attaching the real installers name plate on the outdoor unit


The name plate can offer the detailed information for the installation and it can make service more quickly.

To make quick service, the position of breaker should be shown on the column.

7.2 Checking point

7.2.1 Checks Before Test Run

7. Start up

1 Check to see whether there is any refrigerant leakage, and slack of power or transmission cable.

2 Confirm that 500 V shows 2 M or more between power supply terminal block and ground. Do not operate in the case of 2 M or less.

NOTE: Never carry out M check over terminal control board. Otherwise the control board

would be broken.

Immediately after mounting the unit or after leaving it turned off for an extended length of time,

the resistance of the insulation between the power supply terminal board and the ground may

decrease to approx. 2 M as a result of refrigerant accumulating in the internal compressor.

If the insulation resistance is less than 2 M, turning on the main power supply and energizing

the crankcase heater for more than 6 hours will cause the refrigerant to evaporate, increasing

the insulation resistance.


the insulation resistance.

3 Check if high/low pressure common pipe, liquid pipe and gas pipe valves are fully opened.

NOTE: Be sure to tighten caps.

4 Check if there are any problems in automatic addressing or not:

Check and confirm that there are no error messages in the display of indoor units or remote controls

and LED in outdoor units.

CAUTION

While cutting main power of the Multi V,

Always apply main power of the outdoor unit during use of product (cooling season/heating season).

Always apply power 6 hours in advance to heat the crank case heater where performing test run after installation of product. It may result in burning out of the compressor if not preheating the crank case with the electrical heater for more than 6 hours. (In case of the outdoor temperature below 10C)

7.2 Checking point 7. Start up

7.2.2 Trouble Shooting in case of Abnormal Test Run

The phenomena from Main Component Failure

Component Phenomenon Cause Check method and Trouble shooting

Compressor

Not operating

Motor insulation broken Check resistance between terminals and chassis

Strainer clogged Change strainer

Oil leakage Check oil amount after opening oil port

Stop during running Motor insulation failure Check resistance between terminals and chassis

Abnormal noise during

runningR-S-T misconnection Check compressor R-S-T connection

Motor failure, bad ventilation Check the outdoor fan operation after being


When system fault occurs, the error code is displayed at indoor unit display or remote control display, the trouble Shooting guide is in the service manual

Outdoor fan High pressure error at coolingMotor failure, bad ventilation

around outdoor heat

exchanger

Check the outdoor fan operation after being

turned the outdoor units off for some time.

Remove obstacles around the outdoor units

Outdoor

EEV

Heating failure, frequent

defrostingBad connector contact Check connector

No operating sound at

applying powerCoil failure Check resistance between terminals

Heating failure, frozen

outdoor heat exchanger partEEV clogged Service necessary

Low pressure error or

discharge temperature ErrorEEV clogged Service necessary

7.3 Special Functions 7. Start up

7.3.1 Sensor Checking Function

Sensor checking function judges whether the current temperature of indoor and outdoor unit sensors is

right or not (Note 1).

3 indoor temperature sensors, 9 outdoor temperature sensors, 2 outdoor pressure sensors.

It is used for judging sensor abnormality (Note 2).




Note 1. Outdoor temperature number is different according to each chassis.

Note 2. Please check the sensor that is found abnormal.


Note 2. Please check the sensor that is found abnormal.Note 3. Each step is displayed on the Main PCB LED.Note 4. Please refer to the sensor error descriptions on the next page.


7.3.2 Real Time Sensor Check

Sensor Check Error Code DisplayIn case error occurs during sensor checking process, error display is as shown below.

Following contents are displayed one after the other on the main PCB of master outdoor unit.

Displaying error contentIndoor unit error display


Indoor unit error display1.1st and 2nd number represents indoor unit number.

2. Last number represents sensor.

1: Pipe inlet temperature sensor

2: Pipe outlet temperature sensor

3: Air temperature sensor

Displaying outdoor unit error1.1st and 2nd number represents error content (code).

2.Last number represents outdoor unit number.

1 : Master

2 : Slave 1

3 : Slave 2

4 : Slave 3

* Indoor unit number follows auto addressing number.

(To check the LGMV Data)

7.3 Special Functions

Ex) Indoor unit No. 2 Pipe inlet temperature sensor error

Ex) Outdoor Master Unit Liquid pipe temperature sensor error

Ex) IDU No.2 Pipe inlet temperature sensor error and Master

ODU suction temperature sensor, Master ODU high pressure sensor error

7.3.2 Real Time Sensor Check


Caution

Up to 5 number of errors is displayed continuously and repeatedly. IN case 5 error occurs, again perform sensor checking after solving errors.

IDU in which error occurred operates air circulation mode.

7. Start up7.3 Special Functions

7.3.3 Refrigerant Auto Charging

This function charges appropriate amount of refrigerant automatically through cycle operation.

It can be used when refrigerant amount is not proper because of SVC and leakage.. ID rId3 .



7.3.3 Refrigerant Auto Charging ID rId3 .


Note1. After installing the refrigerant charging device, as shown in figure, open the valve

2. In case air temperature is out of guaranteed temperature, it may end without performing Auto charging

3. Refrigerant charging Time may change according to the charging amount. (Abt. 1.5min/lb)

Note: For more information refer PDB.


7.3.4 Refrigerant Checking Function

This function judges refrigerant leakage and overcharging. It can be used with refrigerant auto charging

function.



7.3.4 Refrigerant Checking Function


Note1. In case air temperature is out of guaranteed temperature, refrigerant checking function may end without

performing refrigerant checking. Use guaranteed temperature range only.

2. During the process of judging refrigerant amount, if the cycle isn't stable, refrigerant checking function

may end without performing refrigerant checking.

Note: For more information refer PDB.


In cooling mode, this function makes the ODU fan operate at low RPM to reduce the fan noise of ODU at

night which has low cooling load.

Max. RPM setting method

Dip S/W No. 12+14 ON

Main PCB Power Reset


Note 1) Setting Method for Fan Max. RPM


Setting the Fan Max. RPM

Setting Complete

Note 1)




Caution:1. Request installer to set the function during

installation.

2. In case the function is not used, set the dip S/W OFF

and reset the power.

3. If ODU RPM changes, cooling capacity may go down.


7.3.6 Static Pressure Compensation Mode

This function secures the air flow rate of ODU, in case static pressure has been applied like using duct at

fan discharge of ODU.

Static pressure compensation dip S/W setting method

High static pressure mode : Master ODU Main PCB SW02B NO.13 Dip S/W

Static pressure compensation mode setting method

DIP switch setting

Static pressure compensation mode setting method

DIP switch OFF


DIP switch setting

High static pressure : No. 13

Power Reset

Static pressure compensation mode is set

DIP switch OFF

Power Reset

Static pressure compensation mode is cancelled

8. Troubleshooting8.1 Error Codes

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 Display1st,2nd LED of 7-segment indicates error number, 3rd LED indicates unit number.

Ex) 211 : No.21 error of master unit

213 : No.21 error of slave2

011 051 : No.105 error of master unit


Note: Refer PDB or Service Manual for all the Error Codes.

9. New Functions9.1 Cool/ Heat Selector

Multi V III series provides all off function instead of Fan mode.

[Installation]- Connect wires to the cool/heat selector as shown in below figure

- Insert the wire in terminal by pushing "push" button

- Set the DIP Switch of main PCB in master outdoor unit.


9. New Functions9.1 Cool/ Heat Selector

[Setting]- Set DIP S/W according to DIP S/W setting table.

- Push black button on SVC PCB

- Select number as follow at 7-segment

0 : Selector does not use

1 : Cooling/ Heating & Fan mode

2 : Cooling/ Heating & All OFF mode


9. New Functions9.2 New Dry Contact

This function gives partial load operation easily using simple switch and co-working with digital demand

controller.

[Installation]- Connect wires to the PI485 Gate-way on Main PCB as shown.

- New ODU dry contact is using DC 12V (Using 12V Adaptor)

- Choice control module; Simple switch or DDC module

9.2.1 Demand Control

ID rId4 .



9.2.2 Outdoor Fan Low Speed Control

This function control outdoor fan speed manually. Night silent operation is automatic after setting the DIP

switch. But this function is operated manually by simple switch or timer.



- Choice control module; Simple switch or timer.

- Set DIP S/W as same as Night Silent Operation

ID rId4 .



9.2.3 Error Alarm

This function indicates system fault information by buzzer or warming lamp, when any error is occurred in

the system (Buzzer or warning light is not provided).

Faults occur not only in ODUs but also in IDUs.

New ODU dry contact operates with relay output.



- Choice control module; buzzer or warning lamp


9. New Functions9.3 Independent Power Module

The main PCB controls the Indoor EEV, when the power is turn on.

The independent sub PCB controls the Indoor EEV, when the power is turn off.

ID rId4 .

If the power is Cut-Off, product needs to close EEV.


Publisher : CAC Engineering Team

Air Conditioning Company

LG Electronics Inc.

Multi V

LG Electronics Inc.

The date of issue : 2010.08

Copyright Copyright Copyright Copyright 2010 by LG Electronics, Inc. All rights reserved.2010 by LG Electronics, Inc. All rights reserved.2010 by LG Electronics, Inc. All rights reserved.2010 by LG Electronics, Inc. All rights reserved.No part of this publication may be reproduced or distributed in No part of this publication may be reproduced or distributed in No part of this publication may be reproduced or distributed in No part of this publication may be reproduced or distributed in any form or by any means, without the prior written permission any form or by any means, without the prior written permission any form or by any means, without the prior written permission any form or by any means, without the prior written permission of the publisher.of the publisher.of the publisher.of the publisher.

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