LG Electronics ARUN072DT3 User Manual

INSTALLATION MANUAL

AIR CONDITIONER

• Please read this installation manual completely before installing the product.

• Installation work must be performed in accordance with the national

wiring standards by authorized personnel only.

• Please retain this installation manual for future reference after reading

it thoroughly.your set and retain it for future reference.

P/NO : MFL67221404

www.lg.com

MODELS : ARUN Series

ENGLISH FRANÇAIS

ESPAÑOL

2 Outdoor Unit

IMPORTANT!

CAUTION

: Improper installation, adjustment, alteration, service or maintenance can void the warranty.

The weight of the condensing unit requires caution and proper handling procedures when lifting

or moving to avoid personal injury. Use care to avoid contact with sharp or pointed edges.

Safety Precautions

• Always wear safety eye wear and work gloves when installing equipment.

• Never assume electrical power is disconnected. Check with meter and equipment.

• Keep hands out of fan areas when power is connected to equipment.

• R-410A causes frostbite burns.

• R-410A is toxic when burned.

NOTE TO INSTALLING DEALER: The Owners Instructions and Warranty are to be given to the owner

or prominently displayed near the indoor Furnace/Air Handler Unit.

When wiring:

Electrical shock can cause severe personal injury or death. Only a qualified,

experienced electrician should attempt to wire this system.

• Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked.

• Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these

instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.

• Ground the unit following local electrical codes.

•

Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.

The choice of materials and installations must comply with the applicable local/national or international standards.

When transporting:

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and

bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on

the air conditioner can cut your finger.

When installing...

... in a wall: Make sure the wall is strong enough to hold the unit's weight.

It may be necessary to construct a strong wood or metal frame to provide added support.

... in a room: Properly insulate any tubing run inside a room to prevent "sweating" that can cause

dripping and water damage to wall and floors.

... in moist or uneven locatinons: Use a raised concrete pad or concrete blocks provide a solid,

level foundation for the outdoor unit. This prevents water damage and abnormal vibration.

... in an area with high winds: Securely anchor the outdoor unit down with bolts and a metal

frame. Provide a suitable air baffle.

... in a snowy area(for Heat Pump Model): Install the outdoor unit on a raised platform that is

higher than drifting snow. Provide snow vents.

When connecting refrigerant tubing

• Keep all tubing runs as short as possible.

• Use the flare method for connecting tubing.

• Check carefully for leaks before starting the test run.

When servicing

• Turn the power OFF at the main power box(mains) before opening the unit to check or repair

electrical parts and wiring.

• Keep your fingers and clothing away from any moving parts.

• Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have

been left inside the unit being serviced.

Special warnings

WARNING

• Installation or repairs made by unqualified persons can result in hazards to you and others.

Installation of all field wiring and components MUST conform with local building codes or, in the absence of local

codes, with the National Electrical Code 70 and the National Building Construction and Safety Code or Canadian

Electrical code and National Building Code of Canada.

• The information contained in the manual is intended for use by a qualified service technician familiar with safety

procedures and equipped with the proper tools and test instruments.

• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property

damage, personal injury and/or death.

Please read this instruction sheet completely before installing the product.

This air conditioning system meets strict safety and operating standards. As the installer or service person,

it is an important part of your job to install or service the system so it operates safely and efficiently.

Installation Manual 3

ARUN Series Outdoor unit Installation Manual

TABLE OF CONTENTS

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

Installation Process................................................................................8

Outdoor units Information .....................................................................9

Environment-friendly Alternative Refrigerant R410A .......................14

Select the Best Location......................................................................15

Installation Space .................................................................................16

Lifting method.......................................................................................18

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

Refrigerant piping installation.............................................................24

Pipe connections between indoor and outdoor unit.........................28

Electrical Wiring ...................................................................................54

Test Run.................................................................................................81

New Function .....................................................................................101

Caution For Refrigerant Leak ............................................................109

Installation guide at the seaside........................................................111

4 Outdoor Unit

Safety Precautions

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

be followed.

n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is

classified by the following indications.

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

This symbol indicates the possibility of death or serious injury.

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

Be sure not to do.

Be sure to follow the instruction.

n Installation

Have all electric work done by a licensed

electrician according to "Electric Facility En-

gineering Standard" and "Interior Wire Regu-

lations" and the instructions given in this

manual and always use a special circuit.

• If the power source capacity is inadequate or

electric work is performed improperly, electric

shock or fire may result.

Ask the dealer or an authorized technician to

install the air conditioner.

• Improper installation by the user may result in

water leakage, electric shock, or fire.

Always ground the product.

• There is risk of fire or electric shock.

Always intstall a dedicated circuit and breaker.

• Improper wiring or installation may cause fire or

electric shock.

For re-installation of the installed product, al-

ways contact a dealer or an Authorized Serv-

ice Center.

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

injury.

Do not install, remove, or re-install the unit

by yourself (customer).

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

injury.

Do not store or use flammable gas or

combustibles near the air conditioner.

• There is risk of fire or failure of product.

Use the correctly rated breaker or fuse.

• There is risk of fire or electric shock.

Prepare for strong wind or earthquake and

install the unit at the specified place.

• Improper installation may cause the unit to top-

ple and result in injury.

Do not install the product on a defective in-

stallation stand.

• It may cause injury, accident, or damage to the

product.

Safety Precautions

ENGLISH

Installation Manual 5

Ventilate before operating air conditioner

when gas leaked out.

• It may cause explosion, fire, and burn.

Securely install the cover of control box and

the panel.

• If the cover and panel are not installed securely,

dust or water may enter the outdoor unit and fire

or electric shock may result.

If the air conditioner is installed in a small room, measures must be taken to prevent the

refrigerant concentration from exceeding the safety limit when the refrigerant leaks.

• Consult the dealer regarding the appropriate measures to prevent the safety limit from being ex-

ceeded. Should the refrigerant leak and cause the safety limit to be exceeded, harzards due to lack of

oxygen in the room could result.

Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not com-

press air or Oxygen and Do not use Flammable gases. Otherwise, it may cause fire or explosion.

• There is the risk of death, injury, fire or explosion.

n Operation

Do not damage or use an unspecified power

cord.

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

injury.

Use a dedicated outlet for this appliance.

• There is risk of fire or electrical shock.

Be cautious that water could not enter the

product.

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

damage.

Do not touch the power switch with wet

hands.

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

injury.

When installing and moving the air condi-

tioner to another site, do not charge it with a

different refrigerant from the refrigerant

specified on the unit.

• If a different refrigerant or air is mixed with the

original refrigerant, the refrigerant cycle may

malfunction and the unit may be damaged.

Do not reconstruct to change the settings of

the protection devices.

• If the pressure switch, thermal switch, or other

protection device is shorted and operated

forcibly, or parts other than those specified by

LGE are used, fire or explosion may result.

When the product is soaked (flooded or

submerged), contact an Authorized Service

Center.

• There is risk of fire or electric shock.

Be cautious not to touch the sharp edges

when installing.

• It may cause injury.

Take care to ensure that nobody could step

on or fall onto the outdoor unit.

• This could result in personal injury and product

damage.

Do not open the inlet grille of the product

during operation. (Do not touch the electro-

static filter, if the unit is so equipped.)

• There is risk of physical injury, electric shock, or

product failure.

Keep level even when installing the product.

• To avoid vibration or water leakage.

Do not install the unit where combustible gas

may leak.

• If the gas leaks and accumulates around the

unit, an explosion may result.

Use power cables of sufficient current

carrying capacity and rating.

• Cables that are too small may leak, generate

heat, and cause a fire.

Do not use the product for special purposes,

such as preserving foods, works of art, etc. It

is a consumer air conditioner, not a precision

refrigeration system.

• There is risk of damage or loss of property.

Keep the unit away from children. The heat

exchanger is very sharp.

• It can cause the injury, such as cutting the finger.

Also the damaged fin may result in degradation

of capacity.

When installting the unit in a hospital, com-

munication station, or similar place, provide

sufficient protection against noise.

•

The inverter equipment, private power generator, high-

frequency medical equipment, or radio communication

equipment may cause the air conditioner to operate erro-

neously, or fail to operate. On the other hand, the air

conditioner may affect such equipment by creating noise

that disturbs medical treatment or image broadcasting.

Do not install the product where it is exposed to sea wind (salt spray) directly.

• It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins,

could cause product malfunction or inefficient operation.

n Operation

Do not use the air conditioner in special

environments.

•

Oil, steam, sulfuric smoke, etc. can significantly reduce

the performance of the air conditioner or damage its parts.

Do not block the inlet or outlet.

• It may cause failure of appliance or accident.

Make the connections securely so that the outside

force of the cable may not be applied to the terminals.

• Inadequate connection and fastening may gen-

erate heat and cause a fire.

Be sure the installation area does not deteri-

orate with age.

•

If the base collapses, the air conditioner could fall with it,

causing property damage, product failure, or personal injury.

Install and insulate the drain hose to ensure that water is drained away properly based on the

installation manual.

• A bad connection may cause water leakage.

Safety Precautions

6 Outdoor Unit

n Installation

Always check for gas (refrigerant) leakage

after installation or repair of product.

• Low refrigerant levels may cause failure of

product.

Do not install the product where the noise or

hot air from the outdoor unit could damage

the neighborhoods.

• It may cause a problem for your neighbors.

Safety Precautions

ENGLISH

Installation Manual 7

Safely dispose of the packing materials.

•

Packing materials, such as nails and other metal or

wooden parts, may cause stabs or other injuries.

•

Tear apart and throw away plastic packaging bags

so that children may not play with them. If children

play with a plastic bag which was not torn apart,

they face the risk of suffocation.

Turn on the power at least 6 hours before

starting operation.

• Starting operation immediately after turning on

the main power switch can result in severe

damage to internal parts. Keep the power switch

turned on during the operational season.

Be very careful about product transportation.

• Only one person should not carry the product if it weighs more than 44lbs (20kg).

• Some products use PP bands for packaging. Do not use any PP bands for a means of transportation.

It is dangerous.

• Do not touch the heat exchanger fins. Doing so may cut your fingers.

• When transporting the outdoor unit, suspending it at the specified positions on the unit base. Also

support the outdoor unit at four points so that it cannot slip sideways.

Do not touch any of the refrigerant piping

during and after operation.

• It can cause a burn or frostbite.

Do not operate the air conditioner with the

panels or guards removed.

• Rotating, hot, or high-voltage parts can cause in-

juries.

Do not directly turn off the main power

switch after stopping operation.

• Wait at least 5 minutes before turning off the

main power switch. Otherwise it may result in

water leakage or other problems.

Auto-addressing should be done in condition of

connecting the power of all indoor and outdoour

units. Auto-addressing should also be done in

case of changing the indoor unit PCB.

Use a firm stool or ladder when cleaning or

maintaining the air conditioner.

• Be careful and avoid personal injury.

Do not insert hands or other objects through

the air inlet or outlet while the air conditioner

is plugged in.

• There are sharp and moving parts that could

cause personal injury.

Installation Process

The foundation must be level even

Outdoor unit foundation work

Avoid short circuits and ensure

sufficient space is allowed for service

Installation of outdoor unit

Refer to automatic addressing flowchart

Automatic addressing of indoor unit

In the final check for 24hours at 3.8MPa(551psi) there must be no drop in pressure.

Airtight test

Multiple core cable must not be used.

(suitable cable should be selected)

Electrical work

(connection circuits and drive circuits)

Make sure no gaps are left where

the insulating materials are joined

Heat insulation work

Make sure airflow is sufficient

Duct work

Adjust to downward gradient

Drain pipe work

Special attention to dryness,

cleanness and tightness

Refrigerant piping work

Check model name to make

sure the fitting is made correctly

Installation of indoor unit

Take account of gradient

of drain piping

Sleeve and insert work

Make connection clearly between outdoor, indoor, remote controller and option.

Preparation of contract drawings

Indicate clearly who will be responsible for switch setting.

Determination of division work

The vacuum pump used must have a capacity of reaching at least 5 torr, more than 1 hour

Vacuum drying

Recharge correctly as calculated in this manual. and record the amount of added refrigerant

Additional charge of refrigerant

Make sure there are no gaps left between the facing materials used on the ceiling

Fit facing panels

Run each indoor unit in turn to make sure the pipe work has been fitted correctly

Test run adjustment

Explain the use of the system as clearly as possible to your customer and make sure all relevant

documentation is in order

Transfer to customer with explanation

Preheat the crank case with the electrical heater for more than 6 hours.

• The above list indicates the order in which the individual work operations are normally carried out but this order may be

varied where local conditions warrants such change.

• The wall thickness of the piping should comply with the relevant local and national regulations for the designed pressure

3.8MPa(551psi).

• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.(If the refriger-

ant is charged in its gaseous state, its composition changes and the system will not work properly.)

8 Outdoor Unit

Installation Process

Outdoor units Information

ENGLISH

Installation Manual 9

Unit 1 Outdoor Unit 2 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

14 18 20

12 14 16

ARUN144BT3 ARUN168BT3 ARUN192BT3

ARUN144BT3 ARUN072BT3 ARUN072BT3

ARUN096BT3 ARUN121BT3

9.4 14.9 14.9

20.7 32.8 32.8

23 26 29

280 × 1 (190 × 1) + (280 × 1) (190 × 1) + (280 × 1)

617 × 1 (418 × 1) + (617 × 1) (418 × 1) + (617 × 1)

(1,240×1,680×760)×1 (920×1,680×760)×1 (920×1,680×760)×1

(1,240×1,680×760)×1 (1,240×1,680×760)×1

(48.8×66.1×29.9)×1 (36.2×66.1×29.9)×1 (36.2×66.1×29.9)×1

(48.8×66.1×29.9)×1 (48.8×66.1×29.9)×1

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

28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8)

Outdoor units Information

n Heat pump

n Combination Ration(50~130%)

Notes: * We can guarantee the operation only within 130% Combination.

Outdoor Number Connection Capacity

Single outdoor unit 130%

Double outdoor units 130%

Triple outdoor units 130%

Power Supply: Outdoor Unit (3Ø, 208/230V, 60Hz)

Unit 1 Outdoor Unit

System

HP 81012

Ton 6810

Model

ARUN072BT3 ARUN096BT3 ARUN121BT3

Product Charge

kg 5.5 9.4 9.4

lbs 12.1 20.7 20.7

Max. Connectable No. of Indoor Units

13 16 20

Net Weight

kg 190 x 1 280 × 1 280 × 1

lbs 418 x 1 617 × 1 617 × 1

Dimensions

(WxHxD)

mm (920×1,680×760)×1 (1,240×1,680×760)×1 (1,240×1,680×760)×1

inch (36.2×66.1×29.9)×1 (48.8×66.1×29.9)×1 (48.8×66.1×29.9)×1

Connecting

Pipes

Liquid Pipes[mm(inch)]

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

Gas Pipes[mm(inch)]

19.05(3/4) 22.2(7/8) 28.58(1 1/8)

Unit 2 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

22 24 26

18 20 22

ARUN216BT3 ARUN240BT3 ARUN264BT3

ARUN072BT3 ARUN096BT3 ARUN121BT3

ARUN144BT3 ARUN144BT3 ARUN144BT3

14.9 19 19

32.8 41 41

32 35 39

(190 × 1) + (280 × 1) 280 × 2 280 × 2

(418 × 1) + (617 × 1) 617 × 2 617 × 2

(920×1,680×760)×1 (1,240×1,680×760)×2 (1,240×1,680×760)×2

(1,240×1,680×760)×1

(36.2×66.1×29.9)×1 (48.8×66.1×29.9)×2 (48.8×66.1×29.9)×2

(48.8×66.1×29.9)×1

15.88(5/8) 15.88(5/8) 19.05(3/4)

28.58(1 1/8) 34.9(1 3/8) 34.9(1 3/8)

Unit 2 Outdoor Unit 3 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

28 32 34

24 26 28

ARUN288BT3 ARUN312BT3 ARUN336BT3

ARUN144BT3 ARUN072BT3 ARUN072BT3

ARUN144BT3 ARUN096BT3 ARUN121BT3

ARUN144BT3 ARUN144BT3

19 24.3 24.3

41 53.5 53.5

42 45 49

280 × 2 (190 × 1) + (280 × 2) (190 × 1) + (280 × 2)

617 × 2 (418 × 1) + (617 × 2) (418 × 1) + (617 × 2)

(1,240×1,680×760)×2 (920×1,680×760)×1 (920×1,680×760)×1

(1,240×1,680×760)×2 (1,240×1,680×760)×2

(48.8×66.1×29.9)×2 (36.2×66.1×29.9)×1 (36.2×66.1×29.9)×1

(48.8×66.1×29.9)×2 (48.8×66.1×29.9)×2

19.05(3/4) 19.05(3/4) 19.05(3/4)

34.9(1 3/8) 34.9(1 3/8) 34.9(1 3/8)

Unit 1 Outdoor Unit 2 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

36 38 40

30 32 34

ARUN360BT3 ARUN384BT3 ARUN408BT3

ARUN072BT3 ARUN096BT3 ARUN121BT3

ARUN144BT3 ARUN144BT3 ARUN144BT3

24.3 28.2 28.2

53.5 62.1 62.1

52 55 58

(190 × 1) + (280 × 2) 280 × 3 280 × 3

(418 × 1) + (617 × 2) 617 × 3 617 × 3

(920×1,680×760)×1 (1,240×1,680×760)×3 (1,240×1,680×760)×3

(1,240×1,680×760)×2

(36.2×66.1×29.9)×1 (48.8×66.1×29.9)×3 (48.8×66.1×29.9)×3

(48.8×66.1×29.9)×2

19.05(3/4) 19.05(3/4) 19.05(3/4)

41.3(1 5/8) 41.3(1 5/8) 41.3(1 5/8)

Outdoor units Information

10 Outdoor Unit

Outdoor Units Information

ENGLISH

Installation Manual 11

Unit 3 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

ARUN432BT3

ARUN144BT3

28.2

62.1

280 × 3

617 × 3

(1,240×1,680×760)×3

(48.8×66.1×29.9)×3

19.05(3/4)

41.3(1 5/8)

Power Supply: Outdoor Unit (3Ø, 460V, 60Hz)

Unit 1 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

81012

6810

ARUN072DT3 ARUN096DT3 ARUN120DT3

5.5 9.4 9.4

12.1 20.7 20.7

13 16 20

190 x 1 270 × 1 270 × 1

418 x 1 595 × 1 595 × 1

(920×1,680×760)×1 (1,240×1,680×760)×1 (1,240×1,680×760)×1

(36.2×66.1×29.9)×1 (48.8×66.1×29.9)×1 (48.8×66.1×29.9)×1

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

19.05(3/4) 22.2(7/8) 28.58(1 1/8)

Unit 1 Outdoor Unit 2 Outdoor Unit

System

HP 14 18 20

Ton 12 14 16

Model

ARUN144DT3 ARUN168DT3 ARUN192DT3

ARUN144DT3 ARUN072DT3 ARUN072DT3

ARUN096DT3 ARUN120DT3

Product Charge

kg 9.4 14.9 14.9

lbs 20.7 32.8 32.8

Max. Connectable No. of Indoor Units

23 26 29

Net Weight

kg 270 × 1 (190 × 1) + (270 × 1) (190 × 1) + (270 × 1)

lbs 595 × 1 (418 × 1) + (595 × 1) (418 × 1) + (595 × 1)

Dimensions

(WxHxD)

mm (1,240×1,680×760)×1

(920×1,680×760)×1

(1,240×1,680×760)×1

(920×1,680×760)×1

(1,240×1,680×760)×1

inch (48.8×66.1×29.9)×1

(36.2×66.1×29.9)×1

(48.8×66.1×29.9)×1

(36.2×66.1×29.9)×1

(48.8×66.1×29.9)×1

Connecting

Pipes

Liquid Pipes[mm(inch)]

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)

Outdoor Units Information

12 Outdoor Unit

Unit 2 Outdoor Unit

System

HP 22 24 26

Ton 18 20 22

Model

ARUN216DT3 ARUN240DT3 ARUN264DT3

ARUN072DT3 ARUN096DT3 ARUN120DT3

ARUN144DT3 ARUN144DT3 ARUN144DT3

Product Charge

kg 14.9 19 19

lbs 32.8 41 41

Max. Connectable No. of Indoor Units

32 35 39

Net Weight

kg (190 × 1) + (270 × 1) 270 × 2 270 × 2

lbs (418 × 1) + (595 × 1) 595 × 2 595 × 2

Dimensions

(WxHxD)

(920×1,680×760)×1

(1,240×1,680×760)×1

(1,240×1,680×760)×2 (1,240×1,680×760)×2

inch

(36.2×66.1×29.9)×1

(48.8×66.1×29.9)×1

(48.8×66.1×29.9)×2 (48.8×66.1×29.9)×2

Connecting

Pipes

Liquid Pipes[mm(inch)]

15.88(5/8) 15.88(5/8) 19.05(3/4)

Gas Pipes[mm(inch)]

28.58(1 1/8) 34.9(1 3/8) 34.9(1 3/8)

Unit 2 Outdoor Unit 3 Outdoor Unit

System

HP 28 32 34

Ton 24 26 28

Model

ARUN288DT3 ARUN312DT3 ARUN336DT3

ARUN144DT3 ARUN072DT3 ARUN072DT3

ARUN144DT3 ARUN096DT3 ARUN120DT3

ARUN144DT3 ARUN144DT3

Product Charge

kg 19 24.3 24.3

lbs 41 53.5 53.5

Max. Connectable No. of Indoor Units

42 45 49

Net Weight

kg 270 × 2 (190 × 1) + (270 × 2) (190 × 1) + (270 × 2)

lbs 595 × 2 (418 × 1) + (595 × 2) (418 × 1) + (595 × 2)

Dimensions

(WxHxD)

mm (1,240×1,680×760)×2

(920×1,680×760)×1

(1,240×1,680×760)×2

(920×1,680×760)×1

(1,240×1,680×760)×2

inch (48.8×66.1×29.9)×2

(36.2×66.1×29.9)×1

(48.8×66.1×29.9)×2

(36.2×66.1×29.9)×1

(48.8×66.1×29.9)×2

Connecting

Pipes

Liquid Pipes[mm(inch)]

19.05(3/4) 19.05(3/4) 19.05(3/4)

Gas Pipes[mm(inch)]

34.9(1 3/8) 34.9(1 3/8) 34.9(1 3/8)

Unit 3 Outdoor Unit

System

HP 36 38 40

Ton 30 32 34

Model

ARUN360DT3 ARUN384DT3 ARUN408DT3

ARUN072DT3 ARUN096DT3 ARUN120DT3

ARUN144DT3 ARUN144DT3 ARUN144DT3

Product Charge

kg 24.3 28.2 28.2

lbs 53.5 62.1 62.1

Max. Connectable No. of Indoor Units

52 55 58

Net Weight

kg (190 × 1) + (270 × 2) 270 × 3 270 × 3

lbs (418 × 1) + (595 × 2) 595 × 3 595 × 3

Dimensions

(WxHxD)

(920×1,680×760)×1

(1,240×1,680×760)×2

(1,240×1,680×760)×3 (1,240×1,680×760)×3

inch

(36.2×66.1×29.9)×1

(48.8×66.1×29.9)×2

(48.8×66.1×29.9)×3 (48.8×66.1×29.9)×3

Connecting

Pipes

Liquid Pipes[mm(inch)]

19.05(3/4) 19.05(3/4) 19.05(3/4)

Gas Pipes[mm(inch)]

41.3(1 5/8) 41.3(1 5/8) 41.3(1 5/8)

ENGLISH

Outdoor Units Information

Installation Manual 13

Unit 3 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

ARUN432DT3

ARUN144DT3

28.2

62.1

270 × 3

595 × 3

(1,240×1,680×760)×3

(48.8×66.1×29.9)×3

19.05(3/4)

41.3(1 5/8)

14 Outdoor Unit

• The refrigerant R410A has the property of higher operating pressure in comparison with R22.

Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this character-

istic should be also considered during the installation.

R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential (ODP) of R410A is

0. These days the developed countries have approved it as the environment-friendly refrigerant and encour-

aged to use it widely to prevent environment pollution.

CAUTION:

• The wall thickness of the piping should comply with the relevant local and national regulations for the designed

pressure 3.8MPa(551.1psi).

• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.

If the refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.

• Do not place the refrigerant container under the direct rays of the sun to prevent it from exploding.

• For high-pressure refrigerant, any unapproved pipe must not be used.

• Do not heat pipes more than necessary to prevent them from softening.

• Be careful not to install wrongly to minimize economic loss because it is expensive in comparison with R22.

Environment-friendly Alternative Refrigerant R410A

ENGLISH

Installation Manual 15

Select the 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 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 unit 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.

• 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 prod-

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

(Ex : Rooftop where there is always sunshine.)

16 Outdoor Unit

Installation Space

Individual Installation

n During the installation of the unit, consider service, inlet, and outlet and acquire the minimum space

as shown in the figures below.

A E



QYMQQOQV@

UYMQOQV@

Category

Case 1

(10mm≤Space A, C≤49mm)

Case 2

(Space A, C

≥

49mm)

Installation Space

4 sides are

walls

Only 2 sides

are walls

Limitations on

the height of

the wall

(Refer to 4 side

walls)

Front

No limit to the height of the wall

No limit to the

height of the wall

Front

• The height of the wall on the front side must be 1500mm(59-1/16 inch) or less.

• The height of the wall on the inlet side must be 500mm(19-11/16 inch) or less.

• There is no limit to the wall on the side.

• If the height of the walls on the front and the inlet 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.

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

- h2 = A(Actual height) - 59-1/16

- h1 = B(Actual height) - 19-11/16

A≥10(13/32”) A≥50(1-31/32”)

B≥300(11-13/16”) B≥100(3-15/16”)

C≥10(13/32”) C≥50(1-31/32”)

D≥500(19-11/16”) D≥500(19-11/16”)

A≥10(13/32”) A≥50(1-31/32”)

B≥300(11-13/16”) B≥100(3-15/16”)

C≥10(13/32”) C≥50(1-31/32”)

D≥500(19-11/16”) D≥500(19-11/16”)

E≥20(25/32”) E≥100(3-15/16”)

A≥10(13/32”) A≥50(1-31/32”)

B≥300(11-13/16”) B≥100(3-15/16”)

C≥10(13/32”) C≥50(1-31/32”)

D≥500(19-11/16”) D≥500(19-11/16”)

E≥20(25/32”) E≥100(3-15/16”)

F≥600(23-5/8”) F≥500(19-11/16”)

A≥10(13/32”) A≥50(1-31/32”)

B≥300(11-13/16”) B≥100(3-15/16”)

C≥10(13/32”) C≥50(1-31/32”)

D≥300(11-13/16”) D≥100(3-15/16”)

E≥20(25/32”) E≥100(3-15/16”)

≥500(19-11/16”) F≥500(19-11/16”)

A≥10(13/32”)

B≥300(11-13/16”)

A≥200(7-7/8”)

B≥300(11-13/16”)

E≥400(15-3/4”)

ENGLISH

Installation Manual 17

Installation Space

Seasonal wind and cautions in winter

• Sufficient measures are required in a snow area or severe cold area in winter so that product can be operated well.

• Get ready for seasonal wind or snow in winter even in other areas.

• Install a suction and discharge duct not to let in snow or rain.

• Install the outdoor unit not to come in contact with snow directly. If snow piles up and freezes on the air suction

hole, the system may malfunction. If it is installed at snowy area, attach the hood to the system.

• Install the outdoor unit at the higher installation console by 500mm(19-11/16inch) inch than the average snowfall

(annual average snowfall) if it is installed at the area with much snowfall.

• Where snow accumulated on the upper part of the Outdoor Unit by more than 100mm(3-15/16inch), always remove

snow for operation.

1. The height of H frame must be more than 2 times the snowfall and its width shall not exceed the width of the

product. (If width of the frame is wider than that of the product, snow may accumulate)

2. Don't install the suction hole and discharge hole of the Outdoor Unit facing the seasonal wind.

18 Outdoor Unit

Lifting Method

• When carrying the suspended, unit pass the ropes under the unit and use the two suspension points each at the

front and rear.

• Always lift the unit with ropes attached at four points so that impact is not applied to the unit.

• Attach the ropes to the unit at an angle of 40° or less.

Lifting method

CAUTION

Be very careful while carrying the product.

• Do not have only one person carry product if it is more than 20kg(44lbs).

• PP bands are used to pack some products. Do not use them as a mean for transportation because they

are dangerous.

• Do not touch heat exchanger fins with your bare hands. Otherwise you may get a cut in your hands.

• Tear plastic packaging bag and scrap it so that children cannot play with it. Otherwise plastic packaging

bag may suffocate children to death.

• When carrying in Outdoor Unit, be sure to support it at four points. Carrying in and lifting with 3-point

support may make Outdoor Unit unstable, resulting in a fall.

• Use 2 belts of at least 3m(26.2ft) long.

• Place extra cloth or boards in the locations where the casing comes in contact with the sling to prevent

damage.

• Hoist the unit making sure it is being lifted at its center of gravity.

Weight per Capacity

Locking points for

transportation ropes

Forklift Carrying Guide

Forklift Carrying Hole

Chassis

Capacity

[HP(Ton)]

Weight [kg(lbs)]

3Ø 208/230V

3Ø 460V

UX2 8 (6) 190 (418) 190 (418)

UX3

10 (8) 280 (617) 270 (595)

12 (10) 280 (617) 270 (595)

14 (12) 280 (617) 270 (595)

ENGLISH

Installation Manual 19

Installation

The location of the Anchor bolts

• 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(3-15/16 inch) under the units legs before

being fixed.

• The outdoor unit supports should have minimum height of 200mm(7-7/8 inch).

• Anchor bolts (M10) must be inserted at least 75mm(2-15/16 inch).

At least 100mm

At lea

t 100mm

At least 100mm

Set up supports under center of the unit.

Center of the Unit

At least 100mm

At least 200mm

The outdoor unit should not be

supported only by the corner

supports.

Set up supports under center of the unit.

Center of the Unit

At least 200mm

730(28-3/4)

760(29-29/32)

65(2-9/16)

Unit : mm(inch)

At least

65(2-9/16)

At least

65(2-9/16)

Chassis

Outdoor unit capacity

A [mm(inch)] B [mm(inch)]

H/R

UX2 8HP 920(36-7/32) 792(31-3/16)

UX3 10~14HP 1240(48-13/16) 1102(43-3/8)

20 Outdoor Unit

Installation

Foundation for Installation

• 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

• 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(7-7/8 inch).

At least 200mm

(7-7/8 inch)

At least 10mm

(13/32 inch)

Unit : mm(inch)

75(2-15/16)

100(3-15/16)

200(7-7/8)

Ⓐ The corner part must be fixed firmly. Otherwise, the

support for the installation may be bent.

Ⓑ Get and use M10 Anchor bolt.

support for the vibration protection in wide area.

Ⓓ Space for pipes and wiring (Pipes and wirings for bottom

side)

Ⓔ H-beam support

Ⓕ Concrete support

WARNING

• Install where it can sufficiently support the weight of the outdoor unit.

If the support strength is not enough, the outdoor unit may drop and hurt people.

• Install where the outdoor unit may not fall in strong wind or earthquake.

If there is a fault in the supporting conditions, the outdoor unit may fall and hurt people.

• Please take extra cautions on the supporting strength of the ground, liquid outlet

treatment(treatment of the liquid flowing out of the outdoor unit in operation), and the passages of

the pipe and wiring, when making the ground support.

• Do not use tube or pipe for liquid outlet in the Base pan. Use drainage instead for liquid outlet.

The tube or pipe may freeze and the liquid may not be drained.

WARNING

• Be sure to remove the MDF(wood support) of the bottom

side of the outdoor unit Base Pan before fixing the bolt.

It may cause the unstable state of the outdoor

settlement, and may cause freezing of the heat

exchanger resulting in abnormal operations.

• Be sure to remove the MDF(wood support) of the bottom

side of the outdoor unit before welding. Not removing

MDF causes hazard of fire during welding.

Pallet(Wood Support)

- Remove before Installation

<5.6(19,100) 1/2 1/4

0.02~0.03 0~0.02

(0.5~0.8) (0~0.5)

<16.0(54,600) 5/8 3/8

0.03~0.04 0.02~0.03

(0.8~1.0) (0.5~0.8)

<22.4(76,400) 3/4 3/8

0.04~0.05 0.02~0.03

(1.0~1.3) (0.5~0.8)

ENGLISH

Installation Manual 21

Installation

Preparation of Piping

1) Cut the pipes and the cable.

n Use the accessory piping kit or the pipes purchased lo-

cally.

n Measure the distance between the indoor and the out-

door unit.

n Cut the pipes a little longer than measured distance.

2) Burrs removal

n Completely remove all burrs from the cut cross section

of pipe/tube.

n Put the end of the copper tube/pipe to downward direc-

tion as you remove burrs in order to avoid to let burrs

drop in the tubing.

3) Flaring work

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

n For below models, carry out flaring work using flaring

tool as shown below.

Applicable Indoor unit models:

ARNU093TN★2, ARNU123TN★2, ARNU153TN★2,

ARNU183TM★2, ARNU243TM★2, ARNU153BG★2,

ARNU183BG★2, ARNU243BG★2

Firmly hold copper tube in a bar (or die) as indicated di-

mension in the table above.

4) Check

n Compare the flared work with figure below.

n If flare is noted to be defective, cut off the flared section

and do flaring work again.

Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.

Pipe [inch]

“ A “ [inch]

Gas Liquid Gas

Liquid

Indoor unit

[kW(Btu/h]

Copper

tube

Slanted Uneven Rough

Pipe

Reamer

Point down

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

Inclined

Inside is shining without scratches.

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

Pipe [inch] “A” [inch(mm)]

Gas Liquid Gas Liquid

5/8 3/8

0.03~0.04 0.02~0.03

(0.8~1.0) (0.5~0.8)

22 Outdoor Unit

Installation

Precautions when connecting pipes

• See the following table for flare part machining dimensions.

• When connecting the flare nuts, apply refrigerant oil to the inside and outside of the flares and turn them three

or four times at first. (Use ester oil or ether oil.)

• See the following table for tightening torque.(Applying too much torque may cause the flares to crack.)

• After all the piping has been connected, use nitrogen to perform a gas leak check.

Union

CAUTION

• Always use a charge hose for service port connection.

•

After tightening the cap, check that no refrigerant leaks are present.

• When loosening a flare nut, always use two wrenches in

combination, When connecting the piping, always use a spanner

and torque wrench in combination to tighten the flare nut.

• When connecting a flare nut, coat the flare(inner and outer faces)

with oil for R410A(PVE) and hand tighten the nut 3 to 4 turns as

the initial tightening.

FLARE SHAPE and FLARE NUT TIGHTENING TORQUE

R=0.4(1/64)~0.8(1/32)

Pipe size [inch(mm)]

Tightening torque [lbf-in(Ncm)]

A [inch(mm)] flare shape

Ø3/8(9.52) 289.4(3270)-353.1(3990) 0.5(12.8)-0.52(13.2)

Ø1/2(12.7) 438.1(4950)-533.7(6030) 0.64(16.2)-0.65(16.6)

Ø5/8(15.88) 547.0(6180)-667.3(7540) 0.76(19.3)-0.78(19.7)

1. Remove the cap and turn the valve counter clockwise with the hexagon wrench.

2. Turn it until the shaft stops.

Do not apply excessive force to the shutoff valve. Doing so may break the valve body, as the valve is not a

backseat type. Always use the special tool.

3. Make sure to tighten the cap securely.

1. Remove the cap and turn the valve clockwise with the hexagon wrench.

2. Securely tighten the valve until the shaft contacts the main body seal.

3. Make sure to tighten the cap securely.

* For the tightening torque, refer to the table on the below.

Tightening torque

Opening shutoff valve

Closing shutoff valve

Shutoff valve

size

Tightening torque(Turn clockwise to close) [N·m(lbf·ft)]

Shaft(valve body) Cap(Valve lid) Service port Flare nut

Ø6.35(1/4)

5.4(4.0) ~ 6.6(4.9)

Hexagonal

wrench

4mm

(5/8inch)

13.5(10.0) ~

16.5(12.2)

11.5(8.5)

~ 13.9(10.3)

14(10.3) ~ 17(12.5)

Ø9.52(3/8) 33(24.3) ~ 39(28.8)

Ø12.7(1/2) 8.1(6.0) ~ 9.9(7.3) 18(13.3) ~ 22(16.2) 50(36.9) ~ 60(44.3)

Ø15.88(5/8) 13.5(10.0) ~ 16.5(12.2)

23(17.0) ~ 27(19.9)

62(45.7) ~ 75(55.3)

Ø19.05(3/4)

27(19.9) ~ 33(24.3)

93(68.6) ~119(87.8)

Ø22.2(7/8)

Hexagonal

wrench

8mm(5/16inch)

36(26.6) ~ 44(32.5) -

Ø28(1

)

ENGLISH

Installation Manual 23

1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance

(over 248℉(120℃)).

2. Precautions in high humidity circumstance:

This air conditioner has been tested according to the

"ISO Conditions with Mist" and confirmed that there is

not any default. However, if it is operated for a long

time in high humid atmosphere (dew point tempera-

ture: more than 73℉(23℃)), water drops are liable to

fall. In this case, add heat insulation material accord-

ing to the following procedure:

• EPDM (Ethylene Propylene Diene Methylene), NBR

(Nitrile Butadiene Rubber) – over 248℉(120℃)

the heat-resistance temperature.

• Add the insulation over 10mm (13/32inch) thickness at high humidity environment.

Indoor unit

Thermal insulator

(accessory)

Fastening band

(accessory)

Refrigerant piping

HEAT INSULATION

Installation

24 Outdoor Unit

Precautions on Pipe connection / Valve operation

Refrigerant piping 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 551.1psi(38.7kgf/cm²) for

work area leakage test.

4. After the degree of a vacuum reaches 0.097psi(5torr), continue the

vacuuming work for more than 1 hour.

5. Open the side pole with hexagonal wrench.

Installing 2 units

Installing 3 units

Gas pipe

Liquid pipe

Common pipe

Pipe connection is done by connecting from the end of the pipe to the

branching pipes, and the refrigerant pipe coming out of the outdoor

unit is divided at the end to connect to each indoor unit. Flare connec-

tion for the indoor unit, and welding connection for the outdoor pipe

and the branching parts.

• Use hexagonal wrench to open/close the valve.

h When connecting to high low pressure com-

mon pipe, connect pipes using connecting

elbows.

Detach knock outs according

the usages.

Detach

knock outs

according

the usages.

Installing on the front side Installing on the side(Limited to high

low pressure common pipe)

WARNING

• Always careful not to leak the refrigerant during welding.

• The refrigerant generates poisonous gas harmful to human body if combusted.

• Do not perform welding in a closed space.

• Be sure to close the cap of the service port to prevent gas leakage after the work.

CAUTION

Please block the pipe knock outs of the front and side panels after installing the pipes.

(Animals or foreign objects may be brought in to damage the cables.)

High Low Pressure Common Pipe Connections

ENGLISH

Installation Manual 25

Refrigerant piping installation

2 outdoor units

Connection of Outdoor units

2 Unit

3 Unit

ARCNN21

ARCNN31

130(5-1/8)

416(16-3/8)

331(13-1/32)

314(12-3/8)

408(16-1/16)

111(4-3/8)

I.D.38.1(1-1/2)

I.D.34.9(1-3/8)

O.D.34.9(1-3/8)

O.D.19.05(3/4)

O.D.15.88(5/8)

O.D.19.05(3/4)

O.D.34.9(1-3/8)

125(4-29/32)

406(15-31/32)

353(13-29/32)

111(4-3/8)

I.D.41.3(1-5/8)

I.D.31.8(1-1/4)

I.D.28.58(1-1/8)

I.D.19.05(3/4)

I.D.15.88(5/8)

I.D.28.58(1-1/8)

I.D.22.2(7/8)

110(4-11/32)

120(4-23/32)

I.D.22.2(7/8)

I.D.12.7(1/2)

I.D.9.52(3/8)

I.D.41.3(1-5/8)

70(2-3/4)

83(3-9/32)

334(13-5/32)

281(11-1/16)

83(3-9/32)

Outdoor units Model Gas pipe Liquid pipe

I.D.

9.52(3/8)

O.D. 19.05(3/4)

I.D. 15.88(5/8)

O.D. 12.7(1/2)

I.D. 12.7(1/2)

I.D. 6.35(1/4)

110(4-11/32)

I.D.9.52(3/8)

I.D.22.2(7/8)

I.D.19.05(3/4)

O.D.28.58(1-1/8)

I.D.22.2(7/8)

I.D.19.05(3/4)

O.D.28.58(1-1/8)

I.D34.9(1-3/8)

I.D38.1(1-1/2)

I.D.3/4(19.05)

O.D.3/4(19.05)

I.D.3/4(19.05)

O.D.3/4(19.05)

For more information, refer accessory installation manual.

Field Supply (Not provided by LG)

Common pipes

[Unit: inch(mm)]

Y branch

To outdoor unit

To branch piping or indoor unit

Facing

upwards

Facing

downwards

Within ± 3° Within ± 3°

Viewed from point A

in direction of arrow

Within +/- 10

26 Outdoor Unit

Refrigerant piping installation

To Outdoor Unit

Sealed Piping

1. Use the following materials for refrigerant piping.

• Material: Seamless phosphorous deoxidized copper pipe

• Wall thickness :

Comply with the relevant local and national regulations for the designed pressure

3.8Mpa(551.1psi). We recommend the following table as the minimum wall thickness.

2. Commercially available piping often contains dust and other materials. Always blow it clean with a dry inert

gas.

3. Use care to prevent dust, water or other contaminants from entering the piping during installation.

4. Reduce the number of bending portions as much as possible, and make bending radius as big as possible.

5. Always use the branch piping set shown below, which are sold separately.

6. If the diameters of the branch piping of the designated refrigerant piping differs, use a pipe cutter to cut

the connecting section and then use an adapter for connecting different diameters to connect the piping.

7. Always observe the restrictions on the refrigerant piping (such as rated length, difference in height, and

piping diameter).

Failure to do so can result in equipment failure or a decline in heating/cooling performance.

8. A second branch cannot be made after a header. (These are shown by .)

9. The Multi V will stop due to an abnormality like excessive or insufficient refrigerant. At such a time, always

properly charge the unit. When servicing, always check the notes concerning both the piping length and

the amount of additional refrigerant.

10. Never perform a pump down. This will not only damage the compressor but also deteriorate the perform-

ance.

11. Never use refrigerant to perform an air purge. Always evacuate air by using a vacuum pump.

Caution

Outer diameter

[mm(inch

)]

6.35

(1/4)

9.52

(3/8)

12.7

(1/2)

15.88

(5/8)

19.05

(3/4)

22.2

(7/8)

25.4

(1)

28.58

(1-1/8)

31.8

(1-1/4)

34.9

(1-3/8)

38.1

(1-1/2)

41.3

(1-5/8)

Minimum thickness

[mm(inch

)]

0.8

(0.0315)

0.8

(0.0315)

0.8

(0.0315)

0.99

(0.039)

0.99

(0.039)

0.99

(0.039)

0.99

(0.039)

0.99

(0.039)

1.1

(0.043)

1.21

(0.048)

1.35

(0.053)

1.43

(0.056)

ARBL054 ARBL057 ARBL1010

ARBL104 ARBL107 ARBL2010

Y branch

ARBLN01621, ARBLN03321,

ARBLN07121, ARBLN14521

Header

4 branch 7 branch 10 branch

ENGLISH

Installation Manual 27

Refrigerant piping installation

WARNING

When installing and moving the air conditioner to another site, be sure to make recharge refrigerant

after perfect evacuation.

- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and

the unit may be damaged.

- After selecting diameter of the refrigerant pipe to suit total capacity of the indoor unit connected after

branching, use an appropriate branch pipe set according to the pipe diameter of the indoor unit and the in-

stallation pipe drawing.

12. Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling per-

formance, drip of condensate and other such problems.

13. When connecting the refrigerant piping, make sure the service valves of the Outdoor Unit is completely

closed (the factory setting) and do not operate it until the refrigerant piping for the Outdoor and Indoor

Units has been connected, a refrigerant leakage test has been performed and the evacuation process

has been completed.

14. Always use a non-oxidizing brazing material for brazing the parts and do not use flux. If not, oxidized film

can cause clogging or damage to the compressor unit and flux can harm the copper piping or refrigerant

oil.

28 Outdoor Unit

Left Side Pipe Draw Out

Front Side Pipe Draw Out

Right Side Pipe Draw Out

• Pipe connections can be done on the front side or on the side according to the installation environments.

• Be sure to let 2.8psi(0.2kgf/cm²) Nitrogen flow in the pipe when welding.

• If Nitrogen was not flown during welding, many oxidized membranes may form inside the pipe and disturb the normal

operations of valves and condensers.

• Use Knock Outs of Base Pan of the outdoor unit for Left/Right or Bottom pipe drawing outs.

Refrigerant Pipe

Regulator

Nitrogen

Direction

Taping

Valve

Removal Area for common

pipe bottom side connections.

Removal Area for Liquid/Gas pipe

bottom side connections.

1. Open the front panel.

2. Remove Brackets

3. Fix with only nut and washer as shown in the

figure.

Brackets for Transportation

Washer

Nut

Pipe connections between indoor and outdoor unit

Preparation Work

CAUTION

•

Do not give damage to the pipe/base during the Knock Out work.

•

Proceed to pipe work after removing burr after Knock Out work.

• Perform sleeve work to prevent damage to the wire when

connecting wires using Knock Outs.

CAUTION

• Remove the brackets on the inverter condenser legs that were fixed to protect the unit during the transportation.

(If bracket is not removed, abnormal noise or vibration may occur.)

Pipe connections between indoor and outdoor unit

ENGLISH

Installation Manual 29

n Remove leakage prevention cap

• Remove the leakage prevention cap attached to the out-

door unit service valve before pipe work.

• Proceed the leakage prevention cap removal as follows:

1. Verify whether the liquid/gas/common pipes are locked.

2. Extract remaining refrigerant or air inside using the

service port.

3. Remove the leakage prevention cap

n Method of pipe cap work during the instal-

lation of single outdoor unit

1. Remove rubber cap inserted in the common pipe.

2. Wrap the common pipe service valve with wet towel.

3. Insert the pipe cap provided into the common pipe.

4. Place high/low pressure flare nut cap under the pipe cap so

that the pipe cap does not move.

5. Weld the pipe cap.

h If not wrapped with a wet towel, there may be damages in-

side the valve.

h If the unit is operated without pipe cap work, there may be

abnormality in the cycle caused by refrigerant leakage.

n Method of drawing out pipes on the front side

• Proceed with the pipe work as shown in the below figure for front side pipe drawing out.

Liquid pipe

Gas pipe

Common pipe

Service Port

Leakage Prevention Cap

Pipe Cap

Flare Nut

Pipe Drawing Out during Single / Series connection

Common pipe Liquid pipe Gas pipe

Pipe Knock Out for

Liquid/Gas pipes

Pipe Knock Out for

common pipes

Pipe connections between indoor and outdoor unit

30 Outdoor Unit

Common pipe Liquid pipe Gas pipe

Remove only liquid/gas pipe Knock Out View without base pan

Common pipe

View without base pan

Liquid pipe Gas pipe

n Method of drawing out pipes on the bottom side

①

Drawing out common pipe through side panel

n Figure of Sides when drawing out through bottom pipe

②

Drawing out common pipe through bottom pipe

Remove Pipe

Knock Out Hole

i) Single outdoor unit

ii) Series outdoor units

(Draw out common pipes

through bottom)

iii) Series outdoor units

(Draw out common pipes

through side panel)

Pipe connections between indoor and outdoor unit

ENGLISH

Installation Manual 31

Pipe connections between indoor and outdoor unit

u Y branch method

Refrigerant piping system

1 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit

Ⓑ : 1st branch (Y branch)

Master

Slave

Master

Slave

33ft

(10m)

less

131ft(40m) (295ft(90m) : Conditional application)

H 361ft(110m)

L492ft(150m) (656ft(200m) : Conditional application)

ODU Capacity

Master ≥ Slave

49ft(15m)

2 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit

Ⓑ : 1st branch (Y branch)

Ⓓ : Downward Indoor Unit

Ⓔ : Connection branch pipe

between Outdoor units:

ARCNN21

131ft(40m) (295ft(90m) : Conditional application)

H 361ft(110m)

49ft(15m)

L492ft(150m) (656ft(200m) : Conditional application)

Piping length from outdoor branch to outdoor unit ≤ 33ft(10m), equivalent length:max 43ft(13m) (for

12ton(14HP) or more)

Additional Application

To satisfy below condition to make 131ft(40m) ~ 295ft(90m) of pipe length after first branch.

1) 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

Ø1/4(6.35mm)→Ø3/8(9.52mm)→Ø1/2(12.7mm)→Ø5/8(15.88mm)→Ø3/4(19.05mm)→Ø7/8(22.2mm)→Ø1(25.4)*,

Ø1-1/8(28.58mm)→Ø1-1/4(31.8mm)*,Ø1-3/8(34.9mm)→Ø1-1/2(38.1mm)*

* : It is not necessary to size up.

h If the step up size is not available, you can not select the next higher size available.

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

A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 3281ft(1000m)

3) Length of pipe from each indoor unit to the closest branch (a,b,c,d,e) ≤ 131ft(40m)

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

- [Length of pipe from outdoor unit to the closest indoor unit 1 (A+a)] ≤ 131ft(40m)

32 Outdoor Unit

Pipe connections between indoor and outdoor unit

323ft

(10m) or

less

L492ft(150m) (656ft(200m) : Conditional application)

ODU Capacity

Master ≥ Slave1 ≥ Slave 2

131ft(40m) (295ft(90m) : Conditional application)

H 361ft(110m)

49ft(15m)

Slave2

Slave1

Master

3 Outdoor Units

Example : 5 Indoor Units

connected

Ⓐ : Outdoor Unit

Ⓑ : 1st branch (Y branch)

Ⓓ : Downward Indoor Unit

Ⓔ : Connection branch pipe

between Outdoor units:

ARCNN31

Ⓕ : Connection branch pipe

between Outdoor units:

ARCNN21

Piping length form outdoor branch to outdoor unit ≤ 33ft(10m), equivalent length : max. 43ft(13m)(for

12ton(14HP) or more)

Additional Application

To satisfy below condition to make 131ft(40m) ~ 295ft(90m) of pipe length after first branch.

1) 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

Ø1/4(6.35mm)→Ø3/8(9.52mm)→Ø1/2(12.7mm)→Ø5/8(15.88mm)→Ø3/4(19.05mm)→Ø7/8(22.2mm)→Ø1(25.4)*,

Ø1-1/8(28.58mm)→Ø1-1/4(31.8mm)*,Ø1-3/8(34.9mm)→Ø1-1/2(38.1mm)*

* : It is not necessary to size up.

h If the step up size is not available, you can not select the next higher size available.

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

A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 3281ft(1000m)

3) Length of pipe from each indoor unit to the closest branch (a,b,c,d,e) ≤ 131ft(40m)

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

- [Length of pipe from outdoor unit to the closest indoor unit 1 (A+a)] ≤ 131ft(40m)

ENGLISH

Installation Manual 33

Pipe connections between indoor and outdoor unit

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

Ú Total pipe length = A+B+C+D+a+b+c+d+e ≤ 3281ft(1000m)

• * : Assume equivalent piping length of Y branch to be 1.6ft(0.5m), that of header to be 3.3ft(1m), calculation

purpose.

• ** : To apply Conditional Application

Downward Indoor Unit total capacity

[kW(Btu/h)]

≤ 5.6(19,100) 1/4(Ø6.35) 1/2(Ø12.7)

< 16.0(54,600) 3/8(Ø9.52) 5/8(Ø15.88)

≤ 22.4(76,400) 3/8(Ø9.52) 3/4(Ø19.05)

< 33.6(114,700) 3/8(Ø9.52) 7/8(Ø22.2)

< 50.4(172,000) 1/2(Ø12.7) 1

/8( Ø28.58)

< 67.2(229,400) 5/8(Ø15.88) 1

/8 (Ø28.58)

< 72.8(248.500) 5/8(Ø15.88) 1

/8(Ø34.9)

< 100.8(344,000) 3/4(Ø19.05) 1

/8(Ø34.9)

< 173.6(592,500) 3/4(Ø19.05) 1

/8(Ø41.3)

< 184.8(630,700) 7/8(Ø22.2) 1

/4(Ø44.5)

< 224.0(764,400) 7/8(Ø22.2) 2(Ø53.98)

Liquid pipe

[inch(mm)]

Gas pipe

[inch(mm)]

Longest pipe length Equivalent pipe length

A+B+C+D+e ≤ 492ft(656ft**(200m))

A+B+C+D+e ≤ 574ft(656ft**(200m))

Longest pipe length after 1st branch

B+C+D+e ≤ 131ft**(40m))

Difference in height(Outdoor Unit ÷ Indoor Unit)

H ≤ 361ft(110m)

Difference in height (Indoor Unit ÷ Indoor Unit)

h ≤ 49ft(15m)

Difference in height (Outdoor Unit ÷ Outdoor Unit)

h1 ≤ 16.4ft(5m)

WARNING

If overall equivalent pipe length is greater than or equal to 295ft(90m) from ODU to the longest IDU,

The diameter of the main pipe (Gas and Liquid pipes) must be increased as follow.

Ú Refrigerant pipe diameter from outdoor unit to first branch. (A)

h If the step up size is not available, you can not select the next higher size available.

Outdoor unit

Total capacity

[kW (Btu/h)

Standard Pipe Diameter

Conditional application

(more than 90m from ODU to IDU)

Liquid pipe

[mm (inch)]

Gas pipe

[mm (inch)]

Liquid pipe

[mm (inch)]

Gas pipe

[mm (inch)]

16.0~22.4(54,600~76,400)

Φ9.52(3/8)

Φ19.05(3/4)

Φ12.7(1/2)

Φ22.2(7/8)

28.0(95,900)

Φ22.2(7/8) Φ25.4(1)

33.6~44.8(172,000~152,900)

Φ12.7(1/2)

Φ28.58(1 1/8)

Φ15.88(5/8)

Φ28.58(1 1/8)

50.4~61.6(172,000~210,600)

Φ15.88(5/8) Φ19.05(3/4)

Φ31.8(1 1/4)

67.2(229,400)

Φ34.9(1 3/8)

72.8~95.2(248,500~324,900)

Φ19.05(3/4) Φ22.2(7/8)

Φ38.1(1 1/2)

100.8~168.0(344,000~573,300)

Φ41.3(1 5/8) Φ41.3(1 5/8)

173.6~179.2(592,500~611,600)

Φ22.2(7/8)

Φ44.5(1 3/4)

Φ25.4(1)

Φ53.98(2)

184.8~224.0(630,700~764,400)

Φ53.98(2)

34 Outdoor Unit

Pipe connections between indoor and outdoor unit

1 Outdoor Unit

Example : 6 Indoor Units connected

Ⓐ : Outdoor Unit

Ⓑ : 1st branch

Ⓓ : Sealed piping

L 656ft(200m)

131ft(40m)

H 361ft(110m)

49ft(15m)

33ft

(10m) or

less

L 361ft(110m)

49ft(15m)

L 656ft(200m)

131ft(40m)

Slave

Master

Slave

Master

Slave

Master

ODU Capacity

Master Slave

2 Outdoor Units

Example : 6 Indoor Units connected

Ⓐ : Outdoor Unit

Ⓑ : Header branch

Ⓓ : Sealing

Ⓔ : Connection branch pipe be-

tween Outdoor units:

ARCNN21

u Header Method

ENGLISH

Installation Manual 35

Pipe connections between indoor and outdoor unit

Longest pipe length * Equivalent pipe length

A+f ≤ 656ft(200m) A+f ≤ 738ft(225m)

Longest pipe length after 1st branch

f ≤ 131ft(40m)

Difference in height(Outdoor Unit ÷ Indoor Unit)

H ≤ 361ft(110m)

Difference in height (Indoor Unit ÷ Indoor Unit)

h ≤ 49ft(15m)

Difference in height

(Outdoor Unit

Outdoor Unit)

h1 ≤ 16ft(5m)

Ú Total pipe length = A+a+b+c+d+e+f ≤ 3280.8ft(1000m)

WARNING

Pipe length after header branching

(a~f)

It is recommended that difference in

length of the pipes connected to the

Indoor Units is minimized.

Performance difference between

Indoor Units may occur.

• * :

Assume equivalent piping length of Y branch to be 1.6ft(0.5m), that of header to be 3.3ft(1m), calculation purpose

• It is recommended that indoor unit Is installed at lower position than the header.

• Piping length from outdoor branch to outdoor unit ≤ 33ft(10m), equivalent length : max 43ft(13m)

(for 12ton(14HP) or more)

Branch pipe can not be used after header

3 Outdoor Units

Example : 6 Indoor Units connected

Ⓐ : Outdoor Unit

Ⓑ : Header branch

Ⓓ : Sealing

Ⓔ : Connection branch pipe

between Outdoor units:

ARCNN31

Ⓕ : Connection branch pipe

between Outdoor units:

ARCNN21

33ft

(10m)

or less

H 361ft(110m)

49ft(15m)

L 656ft(200m)

131ft(40m)

Master

Slave2

Slave1

ODU Capacity

Master ≥ Slave1 ≥ Slave2

WARNING

If overall equivalent pipe length is greater than or equal to 295ft(90m) from ODU to the longest IDU,

The diameter of the main pipe (Gas and Liquid pipes) must be increased as follow.

Ú Refrigerant pipe diameter from outdoor unit to first branch. (A)

h If the step up size is not available, you can not select the next higher size available.

Outdoor unit

Total capacity

[kW (Btu/h)

Standard Pipe Diameter

Conditional application

(more than 90m from ODU to IDU)

Liquid pipe

[mm (inch)]

Gas pipe

[mm (inch)]

Liquid pipe

[mm (inch)]

Gas pipe

[mm (inch)]

16.0~22.4(54,600~76,400)

Φ9.52(3/8)

Φ19.05(3/4)

Φ12.7(1/2)

Φ22.2(7/8)

28.0(95,900)

Φ22.2(7/8) Φ25.4(1)

33.6~44.8(172,000~152,900)

Φ12.7(1/2)

Φ28.58(1 1/8)

Φ15.88(5/8)

Φ28.58(1 1/8)

50.4~61.6(172,000~210,600)

Φ15.88(5/8) Φ19.05(3/4)

Φ31.8(1 1/4)

67.2(229,400)

Φ34.9(1 3/8)

72.8~95.2(248,500~324,900)

Φ19.05(3/4) Φ22.2(7/8)

Φ38.1(1 1/2)

100.8~168.0(344,000~573,300)

Φ41.3(1 5/8) Φ41.3(1 5/8)

173.6~179.2(592,500~611,600)

Φ22.2(7/8)

Φ44.5(1 3/4)

Φ25.4(1)

Φ53.98(2)

184.8~224.0(630,700~764,400)

Φ53.98(2)

36 Outdoor Unit

Pipe connections between indoor and outdoor unit

u Combination of Y branch/header method

1 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit

Ⓑ : 1st branch (Y branch)

Ⓓ : Indoor Unit

Ⓔ : Header

Ⓕ : Sealed piping

L 492ft(150m)(656ft(200m) : Conditional application)

131ft(40m)(295ft(90m) : Conditional application)

L 361ft(110m)

49ft(15m)

Branch pipe can not be used after header

2 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit

Ⓑ : 1st branch

Ⓓ : Indoor Unit

Ⓔ : Connection branch pipe be-

tween Outdoor units:

ARCNN21

Ⓕ : Header

Ⓖ : Sealed piping

33ft

(10m)

or less

H 361ft(110m)

49ft(15m)

Master

Slave

Master

Slave

Master

Slave

L 492ft(150m)(656ft(200m) : Conditional application)

131ft(40m)(295ft(90m) : Conditional application)

ODU Capacity

Master Slave

ENGLISH

Installation Manual 37

Pipe connections between indoor and outdoor unit

Branch pipe can not be used after header

3 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit

Ⓑ : 1st branch(Y branch)

Ⓓ : Indoor Unit

Ⓔ : Connection branch pipe be-

tween Outdoor units:

ARCNN31

Ⓕ : Connection branch pipe be-

tween Outdoor units:

ARCNN21

Ⓖ : Header

Ⓗ : Sealing

33ft

(10m)

or less

H 361ft(110m)

49ft(15m)

Master

Slave2

Slave1

ODU Capacity

Master ≥ Slave1 ≥ Slave2

L 492ft(150m)(656ft(200m) : Conditional application)

131ft(40m)(295ft(90m) : Conditional application)

38 Outdoor Unit

Pipe connections between indoor and outdoor unit

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

Ú Total pipe length = A+B+C+a+b+c+d+e ≤ 3280.8ft(1000m)

Longest pipe length * Equivalent pipe length

A+B+b ≤ 492ft(656ft(200m)**)

A+B+b ≤ 574ft(738ft(225m)**)

Longest pipe length after 1st branch

B+b ≤ 131ft(40m)(295ft(90m)**)

Difference in height(Outdoor Unit ÷ Indoor Unit)

H ≤ 361ft(110m)

Difference in height (Indoor Unit ÷ Indoor Unit)

h ≤ 49ft(15m)

Difference in height (Outdoor Unit ÷ Outdoor Unit)

h1 ≤ 16ft(5m)

• * :

Assume equivalent pipe length of Y branch to be 1.6ft(0.5m), that of header to be 3.3ft(1m), calculation purpose

• It is recommended that indoor unit is installed at lower position than the header.

Downward Indoor Unit total capacity

[kW(Btu/h)]

≤ 5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)

< 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8)

≤ 22.4(76,400) Ø9.52(3/8) Ø19.05(3/4)

< 33.6(114,700) Ø9.52(3/8) Ø22.2(7/8)

< 50.4(172,000) Ø12.7(1/2) Ø28.58(1

/8 )

< 67.2(229,400) Ø15.88(5/8) Ø28.58(1

/8 )

< 72.8(248.500) Ø15.88(5/8) Ø34.9(1

/8)

< 100.8(344,000) Ø19.05(3/4) Ø34.9(1

/8)

< 173.6(592,500) Ø19.05(3/4) Ø41.3(1

/8)

< 184.8(630,700) Ø22.2(7/8) Ø44.5(1

/4)

< 224.0(764,400) Ø22.2(7/8) Ø53.98(2)

Liquid pipe

[inch(mm)

Gas pipe

[inch(mm)

h If available on site, it use this size. Otherwise it can't be increased.

WARNING

If overall equivalent pipe length is greater than or equal to 295ft(90m) from ODU to the longest IDU,

The diameter of the main pipe (Gas and Liquid pipes) must be increased as follow.

Ú Refrigerant pipe diameter from outdoor unit to first branch. (A)

Outdoor unit

Total capacity

[kW (Btu/h)

Standard Pipe Diameter

Conditional application

(more than 90m from ODU to IDU)

Liquid pipe

[mm (inch)]

Gas pipe

[mm (inch)]

Liquid pipe

[mm (inch)]

Gas pipe

[mm (inch)]

16.0~22.4(54,600~76,400)

Φ9.52(3/8)

Φ19.05(3/4)

Φ12.7(1/2)

Φ22.2(7/8)

28.0(95,900)

Φ22.2(7/8) Φ25.4(1)

33.6~44.8(172,000~152,900)

Φ12.7(1/2)

Φ28.58(1 1/8)

Φ15.88(5/8)

Φ28.58(1 1/8)

50.4~61.6(172,000~210,600)

Φ15.88(5/8) Φ19.05(3/4)

Φ31.8(1 1/4)

67.2(229,400)

Φ34.9(1 3/8)

72.8~95.2(248,500~324,900)

Φ19.05(3/4) Φ22.2(7/8)

Φ38.1(1 1/2)

100.8~168.0(344,000~573,300)

Φ41.3(1 5/8) Φ41.3(1 5/8)

173.6~179.2(592,500~611,600)

Φ22.2(7/8)

Φ44.5(1 3/4)

Φ25.4(1)

Φ53.98(2)

184.8~224.0(630,700~764,400)

Φ53.98(2)

ENGLISH

Installation Manual 39

Pipe connections between indoor and outdoor unit

u Outdoor unit Connection

u Indoor Unit Connection

Ú Indoor Unit connecting pipe from branch (a,b,c,d,e,f)

WARNING

• In case of pipe diameter B connected after first branch is bigger than the main pipe diameter A, B should be of the same

size with A.

Ex) In case indoor unit combination ratio 120% is connected to 70kW outdoor unit.

1) Outdoor unit main pipe diameter A : Ø34.9(1-3/8, gas pipe), Ø15.88(5/8, liquid pipe)

2) Pipe diameter B after first branch according to 120% indoor unit combination(84kW) : Ø34.9(1-3/8, gas pipe),

Ø19.05(3/4, liquid pipe)

Therefore, pipe diameter B connected after first branch would be Ø34.9(1-3/8, gas pipe) / Ø15.88(5/8, liquid pipe)

which is same with main pipe diameter.

[Example]

Instead of using indoor unit total capacity, use outdoor unit model name in order to choose main pipe diameter by

downward.

Do not let the connection pipe from branch to branch exceed the main pipe diameter chosen by outdoor unit model name.

EX) Where connecting the indoor units to the 22 HP (61.6kW) outdoor unit to 120% of its system capacity (73.8 kW) and

branching 7k Btu/h(2.2kW) indoor unit at the 1st branch

Main pipe diameter(22 HP outdoor unit): Ø28.58(1-1/8, Gas pipe) Ø15.88(5/8, Liquid pipe)

Pipe diameter between 1st and 2nd branch (71.7kW indoor units):

Ø34.9(1-3/8, Gas pipe) Ø19.05(3/4, Liquid pipe) in conformity with downward indoor units.

Since the main pipe diameter of 22HP outdoor unit is Ø28.58(1-1/8, Gas pipe) and Ø15.88(5/8, Liquid pipe), Ø28.58 (1-

1/8, Gas pipe) and Ø15.88(5/8, Liquid pipe) is used as the main pipe and the connection pipe between 1st and 2nd

branch.

* High/Low Pressure Common Pipe: Ø19.05(3/4) ; 14HP or more

Indoor Unit capacity [kW(Btu/h)]

≤ 5.6(19,100)

< 16.0(54,600)

≤ 22.4(76,400)

Ø6.35(1/4)

Ø9.52(3/8)

Ø12.7(1/2)

Ø15.88(5/8)

Ø19.05(3/4)

Liquid pipe

[mm(inch)]

Gas pipe

[mm(inch)]

ARNU093TN*2, ARNU123TN*2, ARNU153TN*2, ARNU183TM*2, ARNU243TM*2 : Liquid pipe Ø9.52(3/8), Gas pipe

Ø15.88(5/8)

ARNU153BG*2, ARNU183BG*2, ARNU243BG*2 : Liquid pipe Ø9.52(3/8), Gas pipe Ø15.88(5/8)

40 Outdoor Unit

Pipe connections between indoor and outdoor unit

n Pipe connection between outdoor units

(General Case)

n Pipes between outdoor units are

2m(6.6ft) or less

n Pipes between outdoor units are

2m(6.6ft) or longer

n Examples of Wrong Pipe Connections

The maximum pipe length

after the first branching

between the outdoor units is

10m(33ft) or less

2m(6.6)ft or less

Oil Trap

Oil Trap Oil Trap

2m(6.6ft) or less

0.2m(0.66ft) or more

2m(6.6ft) or longer

2m(6.6ft) or longer2m(6.6ft) or longer

• If the distance between the outdoor units becomes more than 2m(6.6ft), apply Oil Traps between the gas pipes.

• If the outdoor unit is located lower than the main pipe, apply Oil Trap.

If the main pipe is higher

than the outdoor units, oil

is accumulated in the

outdoor unit.

If there are differences in the height

between the outdoor units, oil is

accumulated in the lower outdoor unit.

Oil Trap

u Pipe Connection Method/Precautions for Series connections between Outdoor units

- Separate Y branch joints are needed for series connections between outdoor units.

- Please refer to the below connection examples to install pipe connections between outdoor units.

ENGLISH

Installation Manual 41

Pipe connections between indoor and outdoor unit

• The pipes between the outdoor units must maintain level or give an inclination to prevent a back flow toward the slave

outdoor unit. Otherwise, the unit may not operate properly.

• Apply Oil Trap only to gas pipe as shown below when the length of the pipe between the outdoor units is over 2m(6.6ft).

Otherwise, the unit may not operate properly.

Toward indoor unit

(Example 1)

(Example 2)

(Example 3)

Toward indoor unit

Pipe inclination (2 or more)

Toward indoor unit

≤

2m(6.6ft)

> 2m(6.6ft)

≥

0.2m(6.6ft)

Oil Trap

≤

(Example 1)

(Example 2)

* Install oil trap if the ODU is at lower level than main piping.

42 Outdoor Unit

Pipe connections between indoor and outdoor unit

* The level difference between two outdoor units, h is allowed up to 5m(16.4ft).

• When connecting the pipes between the outdoor units, the accumulation of oil in the slave outdoor unit should be avoided.

Otherwise, the unit may not operate properly.

Toward indoor unit

(Example 1)

(Example 2)

(Example 3)

≥

0.2m(6.6ft)

Toward indoor unit

Toward indoor unit Toward indoor unit

Oil Trap

ENGLISH

Installation Manual 43

Pipe connections between indoor and outdoor unit

The amount of Refrigerant

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

:Ø25.4 mm (1.0 inch)

0.323(lbs/ft)

0.238(lbs/ft)

0.179(lbs/ft)

0.116(lbs/ft)

0.079(lbs/ft)

0.041(lbs/ft)

0.015(lbs/ft)

Total liquid pipe

:Ø22.2 mm (7/8 inch)

Total liquid pipe

:Ø19.05 mm (3/4 inch)

Total liquid pipe

:Ø15.88 mm (5/8 inch)

Total liquid pipe

:Ø12.7 mm (1/2 inch)

Total liquid pipe

:Ø9.52 mm (3/8 inch)

Total liquid pipe

:Ø6.35 mm(1/4 inch)

CF value of indoor unit

CF value of indoor unit (Unit: lbs)

Capacity(Btu/h(kW))

9k 12k 15k 18k 24k 28k 36k 42k 48k 76k 96k

Type

Ceiling Concealed Duct (Low Static)

Ceiling Concealed Duct (High Static)

Wall Mounted

1Way Ceiling Cassette

2Way Ceiling Cassette

4Way Ceiling Cassette

ARTCOOL Gallery

Floor Standing

Ceiling & Floor

Ceiling Suspended

Console

Fresh Air Intake Unit

Heat recovery ventilator(DX)

Hydro kit

Vertical AHU

- 0.37 0.37 0.37 0.37 0.82 0.82 - - - - - -

- 0.57 0.57 0.57 0.57 0.57 0.57 0.97 0.97 0.97 1.37 2.20 2.20

0.97

- 0.53 0.53 0.53 0.53 0.62 0.62 - - - - - -

- 0.44 0.44 0.44 - 0.64 0.64 - - - - - -

- - - - - 0.35 0.35 - - - - - -

0.40 0.40 0.55 0.55 0.71 0.71 1.06 1.06 1.41 1.41 1.41 - -

1.06

1.41

- 0.22 0.22 0.22 - - - - - - - - -

- 0.37 0.37 0.37 0.37 0.82 0.82 - - - - - -

- - 0.22 0.22 - - - - - - - - -

- 0.77 0.77 - 1.19 - 1.65 - - - - - -

- 0.37 0.37 0.37 0.37 - - - - - - - -

- - - - - - - - - - 1.37 2.20 2.20

- - - 0.44 - 0.44 0.44 - - - - - -

- - - - - - - - - - - - 3.53

- - - - - 1.04 1.04 - 1.57 2.00 2.00 2.00 2.00

CAUTION

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

# : Use only ARNU153BGA2, ARNU183BGA2, ARNU243BGA2

##: Use only ARNU093TN*2, ARNU123TN*2, ARNU153TN*2, ARNU183TM*2, ARNU243TM*2

44 Outdoor Unit

Pipe connections between indoor and outdoor unit

WARNING

▶ Regulation for refrigerant leakage

: the amount of refrigerant leakage should satisfy the following equation for human safety.

p If the above equation can not be satisfied, then follow the following steps.

- Selection of air conditioning system: select one of the next

1. Installation of effective opening part

2. Reconfirmation of Outdoor Unit capacity and piping length

3. Reduction of the amount of refrigerant

4. Installation of 2 or more security device (alarm for gas leakage)

- Change Indoor Unit type

: installation position should be over 6.6ft from the floor (Wall mounted type ’ Cassette type)

- Adoption of ventilation system

: choose ordinary ventilation system or building ventilation system

- Limitation in piping work

: Prepare for earthquake and thermal stress

Total amount of refrigerant in the system

≤ 0.44(kg/m

(0.028 (lbs/ft³))

Volume of the room at which Indoor Unit of the least capacity is installed

- Add exact amount of refrigerant calculated by the installation pipe diameter length and the indoor combination.

- If the refrigerant amount is not exact, it may not operate properly.

If additionally bottled refrigerant amount is over ±10%, condenser burning or insufficient indoor unit performance may be caused.

Liquid pipe

Gas pipe

Common pipe

Ⓐ Manifold Gauge

Ⓑ Low pressure side Handle

Refrigerant Charging

WARNING

- Pipe to be vacuumed : gas pipe, water pipe, common pipe

- If the refrigerant amount is not exact, it may not operate properly.

- If additionally bottled refrigerant amount is over ±10%, condenser burning or insufficient indoor unit per-

formance may be caused.

ENGLISH

Installation Manual 45

Pipe connections between indoor and outdoor unit

1. Line Distribution

2. Vertical Distribution

Ensure that the branch pipes are attached vertically.

3. The others

Header

Slave

Master

Slave

Master

1st

Main pipe

Distribution

2nd

3rd

Slave

Master

Slave

Master

Slave

Master

Slave

Master

3rd

Main pipe

Distribution

Slave

Master

1st

3rd

3rd main pipe distribution

2nd

Distribution Method

46 Outdoor Unit

Pipe connections between indoor and outdoor unit

Branch pipe Fitting

Y branch

To Outdoor Unit

To Branch Piping or Indoor Unit

Facing

upwards

Facing

downwards

Within 3 Within 3

Viewed from point A

in direction of arrow

Horizontal

plane

Within +/- 10

Insulator

(included with kit)

Liquid and gas

pipe joints

Insulator for

field piping

Tap e

(field supply)

Header

To outdoor unit

To indoor unit

• Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.)

• There is no limitation on the joint mounting configuration.

• If the diameter of the refrigerant piping selected by the procedures described is different from the size of

the joint, the connecting section should be cut with a pipe cutter.

• Branch pipe should be insulated with the insulator in each kit.

• When the number of pipes to be connected is

smaller than the number of header branches, in-

stall a cap to the unconnected branches.

• The indoor unit having larger capacity must be

installed closer to Ⓐ than smaller one.

• If the diameter of the refrigerant piping selected

by the procedures described is different from

the size of the joint,

the connecting section

should be cut with a pipe cutter.

ENGLISH

Installation Manual 47

Pipe connections between indoor and outdoor unit

• When the number of indoor units to be connected to the branch pipes is less than the number of branch pipes

available for connection then cap pipes should be fitted to the surplus branches.

• Fit branch pipe lie in a horizontal plane.

• Header should be insulated with the insulator in each kit.

• Joints between branch and pipe should be sealed with the tape included in each kit.

• Any cap pipe should be insulated using the insulator provided with each kit and then taped as described above.

Pinched pipe

Horizontal plane

View from point B in the direction of the arrow

Insulate the header using

the insulation

material attached to the

branch pipe kit

as shown in the figure.

Insulator

Insulator of field pipe

Tape

Cap pipe

Insulator for cap pipe

48 Outdoor Unit

Pipe connections between indoor and outdoor unit

u Y branch pipe

Gas pipe Liquid pipe

[Unit:mm(inch)]

Models

ARBLN01621

ARBLN03321

ARBLN07121

ARBLN14521

I.D15.88(5/8)

413(16-1/4)

390(15-11/32)

I.D19.05(3/4)

O.D15.88(5/8)

I.D12.7(1/2)

I.D15.88(5/8)

I.D12.7(1/2)

O.D12.7(1/2)

I.D12.7

(1/2)

I.D12.7

(1/2)

I.D12.7

(1/2)

I.D12.7(1/2)

292(11-1/2)

281(11-1/16)

292(11-1/2)

281(11-1/16)

(2-29/32)

70(2-3/4)

I.D15.88(5/8)

I.D25.4(1)

O.D25.4(1)

80(3-5/32)

110(4-11/32)

110(4-11/32)110(4-11/32)

110(4-11/32)

332(13-1/16)

321(12-5/8)

471(18-17/32)

517(20-11/32)

125

(4-29/32)

371(14-19/32)

394(15-1/2)

(3-9/32)

130(5-1/8)

I.D15.88(5/8)

I.D41.3(1-5/8)

I.D41.3

(1-5/8)

I.D41.3(1-5/8)

I.D38.1(1-1/2)

O.D38.1(1-1/2)

O.D15.88(5/8)

376(14-13/16)

404(15-29/32)

120(4-23/32) 120(4-23/32)

120(4-23/32)

90(3-17/32)

I.D15.88(5/8)

1 3

41616-3/8)

444(17-15/32)

O.D15.88(5/8)

I.D15.88(5/8)

I.D19.05(3/4)

I.D15.88(5/8)

I.D19.05(3/4)

O.D19.05(3/4)

80(3-5/32)

2 3 3

1 2

(3-25/32)

I.D22.2(7/8)

O.D22.2(7/8)

I.D22.2(7/8)

I.D6.35(1/4)

I.D34.9(1-3/8)

O.D34.9(1-3/8)

I.D28.58(1-1/8)

O.D28.58(1-1/8)

I.D28.58(1-1/8)

O.D31.8(1-1/4)

I.D31.8(1-1/4)

I.D9.52(3/8)

O.D9.52(3/8)

ENGLISH

Installation Manual 49

Pipe connections between indoor and outdoor unit

u Header

[Unit:mm(inch)]

4 branch

ARBL054

7 branch

ARBL057

4 branch

ARBL104

7 branch

ARBL107

10 branch

ARBL1010

10 branch

ARBL2010

Models Gas pipe Liquid pipe

360(14-5/32)

540(21-1/4)

120(4-23/32)

ID15.88(5/8)

ID12.7(1/2)

ID15.88(5/8)

ID19.05(3/4)

120(4-23/32)

360(14-5/32)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID12.7(1/2)

150

(5-29/32)

150

(5-29/32)

150

(5-29/32)

150

(5-29/32)

150

(5-29/32)

400(15-23/32)

160(6-5/16)

ID15.88(5/8)ID15.88(5/8)

ID12.7(1/2)ID12.7(1/2)

ID15.88(5/8)

ID12.7(1/2)

ID19.05(3/4)

ID15.88(5/8)

ID22.2(7/8)

ID28.58(1-1/8)

ID25.4(1)

120

(4-23/32)

120

(4-23/32)

120

(4-23/32)

120

(4-23/32)

120

(4-23/32)

120

(4-23/32)

120

(4-23/32)

120

(4-23/32)

120

(4-23/32)

120(4-23/32)

ID15.88(5/8)

ID12.7(1/2)

ID15.88(5/8)

ID12.7(1/2)

ID15.88(5/8)

ID19.05(3/4)

120(4-23/32)

ID6.35(1/4)

ID9.52(3/8)

ID12.7(1/2)

160(6-5/16)

580(22-27/32)

ID19.05(3/4)

ID15.88(5/8)

ID15.88(5/8)ID15.88(5/8)

ID12.7(1/2)ID12.7(1/2)

ID15.88(5/8)

ID12.7(1/2)

ID22.2(7/8)

ID28.58(1-1/8)

ID25.4(1)

700(27-9/16)

120(4-23/32)

ID6.35(1/4)

ID9.52(3/8)

ID9.52(3/8)ID9.52(3/8)

ID6.35(1/4)ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)ID12.7(1/2)

ID15.88(5/8)

ID12.7(1/2)

120(4-23/32)

720(28-11/32)

ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

ID12.7(1/2)

ID9.52(3/8)

107(4-7/32)

60*9=540(21-1/2)

700(27-9/16)

ID6.35(1/4)

ID9.52(3/8)

ID19.05(3/4)

ID15.88(5/8)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

120

(4-23/32)

120

(4-23/32)

160(6-5/16)

760(29-28/32)

ID19.05(3/4)

ID15.88(5/8)

ID22.2(7/8)

ID28.58(1-1/8)

ID25.4(1)

182(7-5/32)

775(30-17/32)

ID19.05(3/4)

ID15.88(5/8)

ID12.7(1/2)

ID28.58(1-1/8)

ID31.8(1-1/4)

ID34.9(1-3/8)

150

(5-29/32)

150

(5-29/32)

150

(5-29/32)

150

(5-29/32)

150

(5-29/32)

150

(5-29/32)

150

(5-29/32)

120(4-23/32)

120

(4-23/32)

360(14-5/32)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID12.7(1/2)

50 Outdoor Unit

Pipe connections between indoor and outdoor unit

Leak Test and Vacuum drying

Indoor unit

Nitrogen gas

cylinder

Nitrogen gas

cylinder

Slave 1 outdoor unit Master outdoor unit

High/low pressure

common pipe

Liquide pipe

Gas pipe

High/low pressure

common pipe

Liquide pipe

Gas pipe

Liquid side

Gas side

(1) Leak test

Leak test should be m

ade by pressurizing nitrogen gas to 3.8Mpa(551.1psi). 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.

Note:

If the ambient temperature differs between the time when pressure is applied and when the pressure drop is

checked, apply the following correction factor

There is a pressure change of approximately 0.01Mpa(1.5psi) for each 1°C of temperature difference.

Correction= (Temp. at the time of pressurization – Temp. at the time of check) X 0.1

For example: Temperature at the time of pressurization 3.8MPa(551psi) is 27 °C

24 hour later: 3.73MPa(541psi), 20°C

In this case the pressure drop of 0.07MPa(10psi) is because of temperature drop

And hence there is no leakage in pipe occurred.

Caution:

To prevent the nitrogen from entering the refrigeration system in the liquid state, the top of the cylinder must be

at higher position than the bottom when you pressurize the system.

Usually the cylinder is used in a vertical standing position.

ENGLISH

Installation Manual 51

Pipe connections between indoor and outdoor unit

(2) Vacuum

Vacuum drying should be made from the service port provided on the outdoor unitʼs service valve to the vac-

uum pump commonly used for liquid pipe, gas pipe and high/low pressure common pipe. (Make Vacuum

from liquid pipe, gas pipe and high/low pressure common pipe with the service valve closed.)

* Never perform air purging using refrigerant.

• Vacuum drying: Use a vacuum pump that can evacuate to -100.7kPa(-14.6psi, 5Torr, -755mmHg).

1. Evacuate the system from the liquid and gas pipes with a vacuum pump for over 2 hrs and bring the sys-

tem to -100.7kPa(-14.6psi).

After maintaining system under that condition for over 1 hr, confirm the vacuum gauge rises. The system

may contain moisture or leak.

2. Following should be executed if there is a possibility of moisture remaining inside the pipe.

(Rainwater may enter the pipe during work in the rainy season or over a long period of time)

After evacuating the system for 2 hrs, give pressure to the system to 0.05MPa(7.3psi)(vacuum break) with

nitrogen gas and then evacuate it again with the vacuum pump for 1hr to -100.7kPa(-14.6psi)(vacuum dry-

ing). If the system cannot be evacuated to -100.7kPa(-14.6psi) within 2 hrs, repeat the steps of vacuum

break and its drying.

Finally, check if the vacuum gauge does not rise or not, after maintaining the system in vacuum for 1 hr.

WARNING

When Installing or moving the air conditioner to another site, recharge after perfect evacuation.

- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and

the unit may be damaged.

Scale

Use a graviometer. (One that can measure

down to 0.1kg(0.22lbs). If you are unable to

prepare such a high-precision gravimeter

you may use a charge cylinder.

Indoor unit

Slave 1 outdoor unit Master outdoor unit

High/low pressure

common pipe

Liquide pipe

Gas pipe

High/low pressure

common pipe

Liquide pipe

Gas pipe

Liquid side

Gas side

Vacuum

pump

Vacuum

pump

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.)

52 Outdoor Unit

Pipe connections between indoor and outdoor unit

Vacuum Mode

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

ment or IDU addition/replacement.

Master unit PCB DIP switch on

- Heat pump : switch on 11, 14

- Cooling only : switch on 11, 14

Vacuum mode setting

ODU V/V OPEN

Main EEV, SC EEV OPEN

IDU EEV OPEN

ODU power reset

Press the black button Main PCB (5 sec.)

Vacuum mode setting method Vacuum mode cancellation method

Master unit PCB DIP switch off

- Heat pump : switch off 11, 14

- Cooling only : switch off 11, 14

Power reset

Vacuum mode cancellation

CAUTION

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

DIP Switch Settings

Warning : Please reset Main PCB before starting this function

ENGLISH

Installation Manual 53

Pipe connections between indoor and outdoor unit

Thermal insulation of refrigerant piping

Heat

insulation

material

Outer

covering

Adhesive + Heat - resistant polyethylene foam +

Adhesive tape

Indoor Vinyl tape

Floor exposed

Water-proof hemp cloth + Bronze asphalt

Outdoor

Water-proof hemp cloth + Zinc plate + Oily paint

Note:

When using polyethylene cover as covering material, asphalt roof-

ing shall not be required.

• Do not insulate gas or low pressure pipe and liquid or high

pressure pipe together.

• Be sure to fully insulate connecting portion.

Liquid pipe

Gas pipe

Power lines

Finishing tape

Insulating material

Bad example

Good example

These parts are not insulated.

B A C

Transmission lines

Liquid pipe

Transmission lines

Separation

Gas pipe

Power lines

Insulating material

Heat insulation material

Pipe

Outer covering

(Wind the connection part and cutting part of

heat insulation material with a finishing tape.)

Power lines

Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with enough

thickness heat-resistant polyethylene, so that no gap is observed in the joint between indoor unit and insulating

material, and insulating materials themselves. When insulation work is insufficient, there is a possibility of con-

densation drip, etc. Pay special attention to insulation work to ceiling plenum.

1m1m

Inner wall (concealed)

Floor (fireproofing)

Penetrating portion on fire

limit and boundary wall

Roof pipe shaft

Outer wall Outer wall (exposed)

Penetrations

Sleeve

Heat insulating material

Lagging

Caulking material

Band

Waterproofing layer

Sleeve with edge

Lagging material

Mortar or other incombustible caulking

Incombustible heat insulation material

When filling a gap with mortar, cover the

penetration part with steel plate so that

the insulation material will not be caved in.

For this part, use incombustible materials

for both insulation and covering.(Vinyl

covering should not be used.)

54 Outdoor Unit

Electrical Wiring

Caution

Remote

control

Remote

control

Remote

control

Remote

control

Indoor

Unit

Outdoor Unit

Indoor

Unit

Remote

control

Remote

control

Indoor

Unit

Indoor

Unit

Remote

control

Remote

control

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

CAUTION

Be sure to correct the outdoor unit to earth. Do not connect earth line to any gas pipe, liquid pipe,

lightening rod or telephone earth line. If earth is incomplete, it may cause an electric shock.

WARNING

Be sure to have authorized electrical engineers do the electric work using special circuits in

accordance with regulations and this installation manual. If power supply circuit has a lack of

capacity or electric work deficiency, it may cause an electric shock or fire.

1. Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring

regulations and guidance of each electric power company.

2. Install the Outdoor Unit transmission line away from the power source wiring so that it is not affected by electric

noise from the power source. (Do not run it through the same conduit.)

3. Be sure to provide designated grounding work to Outdoor Unit.

4. Give some allowance to wiring for electrical part box of Indoor and Outdoor Units, because the box is sometimes

removed at the time of service work.

5. Never connect the main power source to terminal block of transmission line. If connected, electrical parts will

be burnt out.

6. Use 2-core shield cable for transmission line.(O mark in the figure below) If transmission lines of different sys-

tems are wired with the same multiplecore cable, the resultant poor transmitting and receiving will cause erro-

neous operations. ( mark in the figure below)

7. Only the transmission line specified should be connected to the terminal block for Outdoor Unit transmission.

2-Core Shield Cable Multi-Core Cable

ENGLISH

Installation Manual 55

Electrical Wiring

Master Slave1 Slave2

Remote

controller

Remote

controller

Indoor

Unit

Indoor

Unit

Remote

controller

Outdoor Unit

Remote

controller

Indoor

Unit

Indoor

Unit

Remote

controller

Remote

controller

Indoor

Unit

Indoor

Unit

Remote

controller

Remote

controller

Indoor

Unit

Indoor

Unit

2-Core Shield Cable Multi-Core Cable

CAUTION

• Use the 2-core shield cables for transmission lines. Never use them together with power cables.

• The conductive shielding layer of cable should be grounded to the metal part of both units.

• Never use multi-core cable

• As this unit is equipped with an inverter, to install a phase leading capacitor not only will deteriorate

power factor improvement effect, but also may cause capacitor abnormal heating. Therefore, never

install a phase leading capacitor.

• Make sure that the power unbalance ratio is not greater than 2%. If it is greater the units lifespan will

be reduced.

When none are available, follow the instructions below.

• Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power wiring

may cause abnormal heat.)

• For wiring, use the designated power wire and connect firmly, then secure to prevent outside pressure

being exerted on the terminal block.

• Use an appropriate screwdriver for tightening the terinal screws. A screwdriver with a small head will

strip the head and make proper tighterning impossible.

• Over-tightening the terminal screws may break them.

u Precautions when laying power wiring

Round pressure terminal

Power wire

Use round pressure terminals for connections to the power terminal block.

56 Outdoor Unit

Electrical Wiring

Control box and connecting position of wiring

- Remove all of the screws at front panel and remove the panel by pulling it forward.

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

terminal block.

- Connect transmission lines between outdoor unit and indoor units through

the terminal block.

- When the central control system is connected to the outdoor unit, a dedi-

cated PCB must be connected between them.

- When connecting transmission line between outdoor unit and indoor units

with shielded wire, connect the shield ground to the earth screw.

WARNING

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

- Provide an appropriate cover to intercept direct sunlight.

Front Panel

UX3

UX2

Main PCB

Fan PCB

Noise filter

Bridge diode

Magnet switch

Inverter PCB

Take care of the phase

sequence of 3-phase 3-wire

power system

Take care of the phase

sequence of 3-phase 3-wire

power system

Main PCB

Reactor

Fan PCB

Noise filter

Bridge diode

Magnet switch

Inverter PCB

Reactor

UX3

UX2

Main PCB

Fan PCB

Noise filter

Bridge diode

Magnet switch

Inverter PCB

Take care of the phase

sequence of 3-phase 3-wire

power system

Take care of the phase

sequence of 3-phase 3-wire

power system

Main PCB

Reactor

Fan PCB

Noise filter

Bridge diode

Magnet switch

Inverter PCB

Transformer

Reactor

Transformer

n 3Ø 208/230V

n 3Ø 460V

ENGLISH

Installation Manual 57

Electrical Wiring

Transmission and Power Lines

1) Communication cable

• Type : shielding wire

• Use wires of size : over 1.0~1.5mm

• Maximum allowable line length: under 1,000m(3,281ft)

2) Remote control cable

• Type : 3-core cable(shielding wire)

3) Central control cable

4) Separation of communication and power lines

• If communication 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 communication and power

lines where these are to be run side by side

Note:

1. The figures are based on assumed length of parallel cabling up to 100m(328ft). For length in excess of

100m(328ft) the figures will have to be recalculated in direct proportion to the additional length of line

involved.

2. If the power supply waveform continues to exhibit some distortion the recommended spacing in the table

should be increased.

• If the lines are laid inside conduits then the following point must also be taken into account when grouping

various lines together for introduction into the conduits

• Power lines(including power supply to air conditioner) and signal lines must not be laid inside the same

• In the same way, when grouping the lines power and signal lines should not be bunched together.

Current capacity of power line Spacing

10A 300m(11-13/16inch)

50A 500m(19-11/16inch)

100A 1,000m(39-3/8inch)

Exceed 100A 1,500m(59-1/16inch)

100V or more

CAUTION

n If apparatus is not properly earthed then there is always a risk of electric shocks, the earthing job of the

apparatus must be carried out by a qualified person.

Product type Wire type Diameter

ACP&AC Manager (2-shielding wire,2-core wire) 1.0~1.5mm

AC Smart (2-shielding wire,2-core wire) 1.0~1.5mm

Simple central controller (2-shielding wire,2-core wire) 1.0~1.5mm

58 Outdoor Unit

Wiring of main power supply and equipment capacity

Electrical Wiring

1. Use a separate power supply for the Outdoor Unit and Indoor Unit.

2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceed-

ing with the wiring and connections.

3. The wire size is the minimum value for metal conduit wiring. The power cord size should be 1 rank

thicker taking into account the line voltage drops. Make sure the power-supply voltage does not drop

more than 10%.

4. Specific wiring requirements should adhere to the wiring regulations of the region.

5. Power supply cords of parts of appliances for outdoor use should not be lighter than polychloroprene

sheathed flexible cord.

6. Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from

the power supply.

WARNING

• Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring reg-

ulations and guidance of each electric power company.

• Make sure to use specified wires for connections so that no external force is imparted to terminal connections. If con-

nections are not fixed firmly, it may cause heating or fire.

• Make sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include

some amount of direct current.

CAUTION

•

Some installation site may require attachment of an earth leakage breaker. If no earth leakage breaker is installed, it may

cause an electric shock.

• Do not use anything other than breaker and fuse with correct capacity. Using fuse and wire or copper wire with too large ca-

pacity may cause a malfunction of unit or fire.

ENGLISH

Installation Manual 59

1. 60Hz

u Example Connection of Transmission Cable

n 1 Outdoor Unit - 3Ø, 208/230V

Power supply

1 Phase 60Hz

220~240V

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Outdoor Unit]

[Indoor Units]

Power supply

3 Phase 3 Wires

60Hz 208/230V

Power supply

1 Phase 60Hz

220~240V

(Main Switch)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

R S T

Switch

ELCB

The GND terminal at the main PCB is a ‘-’ terminal for day contact, it is not the point to make

ground connection.

Between Indoor and Master Outdoor unit

[Heat Pump]

SODU IDU INTERNET DRY1 DRY2 GND 12V

Master

Outdoor Unit

34 34 34

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,

Communication disorder by noise effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the

equipment utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the prod-

uct is operating, attach a reversed phase protection circuit locally.

Running the product in reversed phase may break the compressor and other parts.

Electrical Wiring

Field Wiring(3Ø, 208/230V)

Note

1) Field Wiring diagram is to be used as a guidelineonly. Wiring should comply with applicable local and national codes

2) ELCB must have function to prevent electrical short and over current at the same time .

3) Use copper wires only.

4) Unit must be grounded in compliance with the applicable local and national codes.

5) ELCB and fuse/breaker must install to the power line

60 Outdoor Unit

■ Do not install the power source connected in series between the units.

■ Be sure that the power source is supplied to Each outdoor unit individually.

R S T

Switch

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

Power supply

3 Phase 3 Wires

60Hz 208/230V

Power Supply

1phase 60Hz

220~240V

(Main Switch)

[Slave]

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

Power supply

3 Phase 3 Wires

60Hz 208/230V

Power Supply

1phase 60Hz

220~240V

(Main Switch)

[Slave]

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

witch

Commu

(2 W

ommunication Line

Cable)

Pow

(2 W

aster

]

ption)

Pull Box

aller option)

R S T

Switch

R S T

Switch

ELCB

ELCB ELCB

ELCB

n 2 Outdoor Units - 3Ø, 208/230V

Electrical Wiring

Note

1) Field Wiring diagram is to be used as a guidelineonly. Wiring should comply with applicable local and national codes

2) ELCB must have function to prevent electrical short and over current at the same time .

3) Use copper wires only.

4) Unit must be grounded in compliance with the applicable local and national codes.

5) ELCB and fuse/breaker must install to the power line

ENGLISH

Installation Manual 61

The GND terminal at the main PCB is a ‘-’ terminal for dry contact.

It is not the point to make ground connection.

• Make sure that terminal number of master and slave outdoor units are matched.(A-A,B-B)

[Heat Pump]

Between Indoor and Master Outdoor unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

Master

Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

Master

Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

Slave

Outdoor Unit

34 34 34

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,

Communication disorder by noise effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the

equipment utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the prod-

uct is operating, attach a reversed phase protection circuit locally.

Running the product in reversed phase may break the compressor and other parts.

Electrical Wiring

62 Outdoor Unit

ELCB

ELCB ELCB ELCB

ELCB

■ Do not install the power source connected in series between the units.

■ Be sure that the power source is supplied to Each outdoor unit individually.

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

Power supply

3 Phase 3 Wires

60Hz 208/230V

Power supply

1 Phase 60Hz

220~240V

(Main Switch)

[Slave1] [Slave2]

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

Power supply

3 Phase 3 Wires

60Hz 208/230V

Power supply

1 Phase 60Hz

220~240V

(Main Switch)

[Slave1] [Slave2]

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

LCB

ation Line

Powe

(2 Wire

Powe

(2 Wires Ca

Power Line

(2 Wires Cable

[Master]

[Slave1]

Power L

res

R S T

Switch

R S T

Switch

R S T

Switch

R S T

Switch

n 3 Outdoor Units - 3Ø, 208/230V

Electrical Wiring

Note

1) Field Wiring diagram is to be used as a guidelineonly. Wiring should comply with applicable local and national codes

2) ELCB must have function to prevent electrical short and over current at the same time .

3) Use copper wires only.

4) Unit must be grounded in compliance with the applicable local and national codes.

5) ELCB and fuse/breaker must install to the power line

ENGLISH

Installation Manual 63

[Heat Pump]

Between Indoor and Master Outdoor unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

Master

Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

Master

Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

Slave1

Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

Slave2

Outdoor Unit

34 34 34

The GND terminal at the main PCB is a ‘-’

terminal for dry contact.

It is not the point to make ground

connection.

• Make sure that terminal number of master

and slave outdoor units are

matched.(A-A,B-B)

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,

Communication disorder by noise effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the

equipment utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the prod-

uct is operating, attach a reversed phase protection circuit locally.

Running the product in reversed phase may break the compressor and other parts.

Electrical Wiring

64 Outdoor Unit

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Outdoor Unit]

[Indoor Units]

Power supply

3 Phase 3 Wires

60Hz 460V

Power supply

1 Phase 60Hz

220~240V

(Main Switch)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

R S T

Switch

ELCB

The GND terminal at the main PCB is a ‘-’ terminal for day contact, it is not the point to make

ground connection.

Between Indoor and Master Outdoor unit

[Heat Pump]

SODU IDU INTERNET DRY1 DRY2 GND 12V

Master

Outdoor Unit

34 34 34

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,

Communication disorder by noise effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the

equipment utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the

product is operating, attach a reversed phase protection circuit locally.

Running the product in reversed phase may break the compressor and other parts.

Field Wiring(3Ø, 460V)

Note

1) Field Wiring diagram is to be used as a guideline only. Wiring should comply with applicable local and national codes

2) ELCB must have function to prevent electrical short and over current at the same time .

3) Use copper wires only.

4) Unit must be grounded in compliance with the applicable local and national codes.

5) ELCB and fuse/breaker must install to the power line

1. 60Hz

u Example Connection of Communication Cable

n 1 Outdoor Unit - 3Ø, 460V

Electrical Wiring

ENGLISH

Installation Manual 65

■ When the power source is connected in series between the units.

■ Be sure that the power source is supplied to Each outdoor unit individually.

R S T

Switch

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

Power Supply

3phase 3wires

60Hz 460V

Power Supply

1phase 60Hz

220~240V

(Main Switch)

[Slave]

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

Power Supply

3phase 3wires

60Hz 460V

Power Supply

1phase 60Hz

220~240V

(Main Switch)

[Slave]

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

R S T

Switch

R S T

Switch

ELCB

ELCB ELCB

ELCB

n 2 Outdoor Units - 3Ø, 460V

Note

1) Field Wiring diagram is to be used as a guideline only. Wiring should comply with applicable local and national codes

2) ELCB must have function to prevent electrical short and over current at the same time .

3) Use copper wires only.

4) Unit must be grounded in compliance with the applicable local and national codes.

5) ELCB and fuse/breaker must install to the power line

Electrical Wiring

66 Outdoor Unit

The GND terminal at the main PCB is a ‘-’ terminal for dry contact.

It is not the point to make ground connection.

• Make sure that terminal number of master and slave outdoor units are matched.(A-A,B-B)

[Heat Pump]

Between Indoor and Master Outdoor unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

Master

Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

Master

Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

Slave

Outdoor Unit

34 34 34

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,

Communication disorder by noise effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the

equipment utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the

product is operating, attach a reversed phase protection circuit locally.

Running the product in reversed phase may break the compressor and other parts.

Electrical Wiring

ENGLISH

Installation Manual 67

ELCB

ELCB ELCB ELCB

ELCB

■ When the power source is connected in series between the units.

■ Be sure that the power source is supplied to Each outdoor unit individually.

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

Power supply

3 Phase 3 Wires

60Hz 460V

Power supply

1 Phase 60Hz

220~240V

(Main Switch)

[Slave1] [Slave2]

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

Power supply

3 Phase 3 Wires

60Hz 460V

Power supply

1 Phase 60Hz

220~240V

(Main Switch)

[Slave1] [Slave2]

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

R S T

Switch

R S T

Switch

R S T

Switch

R S T

Switch

n 3 Outdoor Units - 3Ø, 460V

Note

1) Field Wiring diagram is to be used as a guideline only. Wiring should comply with applicable local and national codes

2) ELCB must have function to prevent electrical short and over current at the same time .

3) Use copper wires only.

4) Unit must be grounded in compliance with the applicable local and national codes.

5) ELCB and fuse/breaker must install to the power line

Electrical Wiring

68 Outdoor Unit

[Heat Pump]

Between Indoor and Master Outdoor unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

Master

Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

Master

Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

Slave1

Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

Slave2

Outdoor Unit

34 34 34

The GND terminal at the main PCB is a ‘-’

terminal for dry contact.

It is not the point to make ground

connection.

• Make sure that terminal number of master

and slave outdoor units are

matched.(A-A,B-B)

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,

Communication disorder by noise effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the

equipment utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the

product is operating, attach a reversed phase protection circuit locally.

Running the product in reversed phase may break the compressor and other parts.

Electrical Wiring

ENGLISH

Installation Manual 69

u Example Connection of Transmission Cable

[BUS type] [STAR type]

• Connection of transmission cable must be in-

stalled like below figure between indoor unit to

outdoor unit.

• Abnormal operation can be caused by communi-

cation defect, when connection of transmission

cable is installed like below figure(STAR type).

Electrical Wiring

70 Outdoor Unit

u UX2 Chassis Wire Connection (3Ø, 208/230V)

Main Power

Terminal Block

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Main Power

Terminal Block

Left Side

Main Power

Terminal Block

Ground Cable

Communication line

Power/Ground lines

Over 50mm Gap

Main Power Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Right Side

Ground Cable

Communication line

Power/Ground lines

Over

50mm Gap

Main Power Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Front Side 1

Main Power

Terminal Block

Insulation sleeves attachments

Fix firmly not to be displaced

Ground Cable

Ground CableGround Cable

ODU-ODU

Communication line

ODU-IDU

Communication line

Ground Cable

ODU-ODU ODU-ODU

Communication lineCommunication line

ODU-ODU

Communication line

Power/Ground lines

Over 50mm Gap

Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Ground Cable

Front Side 2

Main PCB ConnectionMain Power Connection

Electrical Wiring

ENGLISH

Installation Manual 71

Electrical Wiring

Main Power Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Main Power

Terminal Block

Left Side

Main Power

Terminal Block

Main Power Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Right Side

Main Power Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Ground Cable

Power/Ground lines

Over

50mm Gap

Communication line

Main Power

Terminal Block

Front Side 1

Insulation sleeves attachmentsInsulation sleeves attachmentsInsulation sleeves attachments

Ground Cable

Ground CableGround Cable

Fix firmly not

to be displaced

Main Power Terminal Block

Main Power Terminal BlockMain Power Terminal Block

ODU-ODU

Communication line

Insulation sleeves attachments

Ground Cable

Main Power Terminal Block

ODU-ODUODU-ODU

Communication lineCommunication line

ODU-ODU

Communication line

ODU-IDU

Communication

line

Main Power

Terminal Block

Main Power Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Front Side 2

Main PCB ConnectionMain Power Connection

u UX3 Chassis Wire Connection (3Ø, 208/230V)

72 Outdoor Unit

u UX2 Chassis Wire Connection (3Ø, 460V)

Main Power Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Main Power

Terminal Block

Main Power

Terminal Block

Left Side

Ground Cable

Communication line

Power/Ground lines

Over 50mm Gap

Main Power

Terminal Block

Main Power Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Main Power

Terminal Block

Right Side

Ground Cable

Communication line

Power/Ground lines

Over

50mm Gap

Main Power

Terminal Block

Main Power

Terminal Block

Main Power Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Front Side 1

Main Power Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Insulation sleeves attachments

Fix firmly not to be displaced

ODU-ODU

Communication line

Ground CableGround CableGround Cable

Main Power

Terminal Block

ODU-IDU

Communication line

ODU-ODU

Communication lineCommunication line

ODU-ODU

Communication line

Ground Cable

Communication line

Power/Ground lines

Over 50mm Gap

Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Ground Cable

Front Side 2

Main PCB ConnectionMain Power Connection

Electrical Wiring

ENGLISH

Installation Manual 73

Electrical Wiring

u UX3 Chassis Wire Connection (3Ø, 460V)

Main Power Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Main Power

Terminal Block

Left Side

۾ڜ ɶۜʅ

Main Power

Terminal Block

Main Power Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Right Side

Main Power Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Ground Cable

Power/Ground lines

Over

50mm Gap

Communication line

Main Power

Terminal Block

Front Side 1

:;<

Insulation sleeves attachments

Ground Cable

Fix firmly not

to be displaced

Main Power Terminal Block

Main Power Terminal BlockMain Power Terminal Block

ODU-ODU

Communication line

Main Power Terminal Block

ODU-ODUODU-ODU

Communication lineCommunication line

ODU-ODU

Communication line

ODU-IDU

Communication

line

Main Power

Terminal Block

Main Power Main Power

Terminal BlockTerminal Block

Main Power

Terminal Block

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Front Side 2

Main PCB ConnectionMain Power Connection

74 Outdoor Unit

Electrical Wiring

Location of setting dip switch

7 - Segment

SW02V

(Auto Addressing)

SW01B SW02B

n Heat Pump (Main PCB)

ENGLISH

Installation Manual 75

Electrical Wiring

DIP switch setting

n Checking according to dip switch setting

1. You can check the setting values of the Master outdoor unit from 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

n 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 28HP)

Master model code ‘ Slave1 model code ‘ Slave2 model code ‘ total capacity ‘ 2 ‘ 25 ‘ 140 or 160

1 ~255 : Master model code

1 ~255 : Slave1 model code

1 ~255 : Slave2 model code

1 ~255 : Slave3 model code

8~42HP : HP number(sum of master capacity and slave capacity)

No display : cooling only 2 : heat pump

25 : normal

140 or 160 : Model Type (ARUN××BT3:140, ARUN××DT3:160)

Example) 28Hp, R410A

15 ’ 15 ’ 30 ’ 2 ’ 25 ’ 140 or 160

CAUTION

Product may not properly operate if the relevant DIP switch is not properly setup.

}

Refer to table code

Model Code

Model Code Unit (HP) Unit Ref.

12 8

13 10

14 12

15 14

Master &

Slave

R410A

76 Outdoor Unit

Electrical Wiring

CAUTION

1. ʻXʼ mark within the table means that the dip switch must be pulled down. 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.

n Setting the DIP switch

• Heat pump

• If you set the Dip switch 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.

Index 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Heating capacity up

●

IDU Fan RPM Control

●

Auto charging

● ● ● ⅹ ⅹ

Refrigerant Checking Function

● ● ● ⅹ ●

Integrated test operation function (Cooling)

● ● ⅹ ● ⅹ

Integrated test operation function (Heating)

● ● ⅹ ● ●

Inverter backup

●

Unit backup

●

Non-operation indoor unit EEV adjustment

ⅹ ⅹ ● ⅹ ⅹ

Indoor unit target subcooling/overheating adjustment

ⅹ ⅹ ⅹ ● ⅹ

Operation indoor unit EEV adjustment

ⅹ ● ● ⅹ ⅹ

Dry contact

● ● ⅹ

Snow removal fuction

● ⅹ

Forced defrost

ⅹ ●

Snow removal+Forced defrost

● ●

Forced overall defrost

● ●

Static pressure mode

ⅹ ⅹ ⅹ ● ⅹ

Nigh low noise operation (Cooling only)

● ⅹ ●

Night low noise operation (Cooling/Heating)

● ● ●

Pump down

● ⅹ

Pump out

● ●

Forced oil return operation

ⅹ ⅹ ● ⅹ

Vacuum mode

● ⅹ ⅹ ●

Selector Fan/ All OFF

ⅹ ⅹ ● ● ⅹ

ODU Address setting

● ⅹ ⅹ

Master unit

ⅹ ⅹ ⅹ

Slave 1 unit

● ⅹ ●

Slave 2 unit

ⅹ ● ●

Function

ODU

setting

ENGLISH

Installation Manual 77

Electrical Wiring

Automatic Addressing

• The address of indoor units would be set by auto addressing

1) Wait for 3 minutes after supplying power.

(Master and Slave outdoor units, indoor units)

2) Press RED button of the outdoor units for 5

seconds. (H/P : SW02B)

3) A “88” is indicated on 7-segment LED of the

outdoor unit PCB.

4) For completing addressing, 2~7 minutes are

required depending on numbers of connected

indoor units

5) Numbers of connected indoor units whose ad-

dressing is completed are indicated for 30

seconds on 7-segment LED of the outdoor

unit PCB

6) After completing addressing, address of each

indoor unit is indicated on the wired remote

control display window. (CH00, CH01,

CH02, ……, CH06 : Indicated as number of

connected indoor units)

CAUTION

• In replacement of the indoor unit PCB, always perform Auto addressing setting

again (At that time, please check about using Independent power module to any

indoor unit.)

• If power supply is not applied to the indoor unit, operation error occur.

• Auto addressing is only possible on the master Unit.

• Auto addressing has to be performed after 3 minutes to improve communication.

7 - Segment

SW02V

(Auto Addressing)

SW01B SW02B

n Heat Pump (Main PCB)

78 Outdoor Unit

Electrical Wiring

u The Procedure of Automatic Addressing

• Auto addressing setting end

Numbers of indoor unit connection set whose

addressing is completed are indicated for 30seconds

on 7-segment LED after completing setting

Indoor address number is displayed on wired remote control or

indoor unit display window. It is not an error message, will

disappeared when on/off button is pressed on remote control

ex) Display of 01, 02, ..., 15 means connection of 15 indoor

units and auto addressing is completed normally.

Auto addressing start

Waiting 3 minutes

Power On

Press RED Button for 5 sec.

(H/P : SW02V)

7-segment LED = 88

Don’t press RED Button

(H/P : SW02V)

Waiting about 2~7 minutes

7-segment LED

YES

NO Check the connections

of transmission line

= 88

ENGLISH

Installation Manual 79

Electrical Wiring

Group Number setting

Group Number setting for Indoor Units

① Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off.

② The transmission lines connected to INTERNET terminal should be connected to central control of Outdoor

Unti with care for their polarity( A ’ A, B ’ B )

③ Turn the whole system on.

④ Set the group and Indoor Unit number with a wired remote control.

⑤ To control several sets of Indoor Units into a group, set the group ID from 0 to F for this purpose.

Example) Group number setting

number indicate the group number

number point out indoor unit number

[Heat Pump]

B(D) A(C) BA

SODU IDU INTERNET DRY1 DRY2 GND 12V

Group recognizing the simple central controller

No.0 group (00~0F)

No.1 group (10~1F)

No.2 group (20~2F)

No.3 group (30~3F)

No.4 group (40~4F)

No.5 group (50~5F)

No.6 group (60~6F)

No.7 group (70~7F)

No.8 group (80~8F)

No.9 group (90~9F)

No. A group (A0~AF)

No. B group (B0~BF)

No. C group (C0~CF)

No. D group (D0~DF)

No. E group (E0~EF)

No. F group (F0~FF)

Outdoor Units

1 F

Indoor unitGroup

80 Outdoor Unit

Electrical Wiring

Cool/Heat Selector Installation and Connection

Using Cool/Heat Selector Installation and Connection

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

- Insert the wire in terminal by pushing “push” button

- Set the Dip SW of main PCB in master outdoor unit

¨≠

GNDGND

¨≠

GND

< Outdoor Main PCB >

- Insert wire method -

shows field wiring

connected wiring

Push arrow direction.

Insert wire to connector.

Push Button

≠

GNDGNDGND

❈ Communication line length can be maximum 300m, use communication line as thick as 1.25mm

Without Cool/Heat Selector Installation and Connection

In case, try to set mode without Cool/Heat Selector and try to use other switch except from LG Outdoor

Cool/Heat Selector in field.

Connect signal terminal block as below figure and description.

- How to set mode without Cool/Heat Selector

• Cooling Mode Setting

¿‘GND Connection

¡‘Off (Open)

• Heating Mode Setting

¿‘ GND Connection

¡‘GND Connection

• Fan/ All OFF Mode Setting

¿‘ Off (Open)

¡‘GND Connection

GND

¨≠

GND

≠

GND

ENGLISH

Installation Manual 81

Test Run

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

Confirm that 500 V megger shows 2 MΩ or more between power supply terminal block and ground. Do

not operate in the case of 2 MΩ or less.

NOTE: Never carry out megaohm 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 MΩ as a result of refrigerant accumulating in the internal compressor.

If the insulation resistance is less than 2 MΩ, 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.

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

NOTE: Be sure to tighten caps.

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.

Checks Before Test Run

CAUTION

when 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 temperatue

below 10°C)

82 Outdoor Unit

Test Run

How to Cope with Test Run Abnormality

The phenomena from main component failure

Compressor

Outdoor

fan

Outdoor

EEV

Not operating

Stop during running

Abnormal noise

during running

High pressure error

at cooling

Heating failure, fre-

quent defrosting

No operating sound

at applying power

Heating failure,

frozen outdoor heat

exchanger part

Low pressure error

or discharge temper-

ature error

Motor insulation broken

Strainer clogged

Oil leakage

Motor insulation failure

R-S-T misconnection

Motor failure,

bad ventilation around

outdoor heat exchanger

Bad connector contact

Coil failure

EEV clogged

Check resistance between terminals and

chassis

Change strainer

Check oil amount after opening oil port

Check resistance between terminals and

chassis

Check compressor R-S-T connection

Check the outdoor fan operation after being

turned the outdoor units off for some time.

Remove obstacles around the outdoor units

Check connector

Check resistance between terminals

Service necessary

Component Phenomenon Cause Check method and Trouble shooting

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

Add Note : For detailed information, please refer Multi V Troubleshooting Guide Book

ENGLISH

Installation Manual 83

Test Run

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

not. 3 indoor temperature sensors, 10 outdoor temperature sensor Note 1), 2 outdoor pressure sensors.

Sensor Checking Function

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

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.

Start

YES

3 minutes

past after power

reset

DIP switch set

Press black button

for 2 seconds

Sensor Normal

Display Error

Press black button for 2 seconds

Press black button for

5 seconds

End

Data Reset and Wait

All DIP switches OFF and press black

button for 2 seconds

Setting 1 Setting 2 Setting 3 Setting 4

Refrigerant

Auto Recharge

Refrigerant

Auto decide

E: Cooling

F: Heating

Start Inspection of each Function

Setting 1 Setting 2 Setting 3 Setting 4

Note 3)

DIP Switch Settings

Warning : Please reset before starting this function

- Setting1

(Refrigerant Auto Recharge)

- Setting2

(Refrigerant Quantity Auto Decide)

- Setting3

(Integrated Test Run - cooling)

- Setting4

(Integrated Test Run - heating)

WARNING

1. Please confirm if auto addressing function was executed. (Check the number of installed indoor units)

2. Error may occur when the sensor is abnormal according to the installed location and the temperature

conditions. When error occurs, please check each sensor and decide faultiness.

UX2(1 Comp) UX3 (2 Comp)

Heat Pump 6 7

84 Outdoor Unit

Refrigerant Auto Charging

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

It can be used when refrigerant amount Isn't certain because of SVC and leakage.

Wait for 3 min. after power reset

Start

Set the Dip S/W.

(Refer to DIP S/W setting)

Press the black button.

(Press until ‘508’ is displayed)

Press the black button.

Is it necessary to

charge refrigerant?

Press the black button for 2 sec. after turning off

all of dip S/W.

Yes

IDU runs with cooling mode In designated order.

Press the black button

IDU and ODU are turned off when Auto Charging

is completed. Close the valve.

Press the black button

*1)

Refrigerant Auto

Charging Process

Completed.

*2)

DIP Switch Settings

Warning : Please reset Main PCB before starting this function

Note

1. 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/lbs)

Test Run

ENGLISH

Installation Manual 85

Test Run

Procedure

1. Arrange manifold,capillary assembly, refrigerant vessel and scale

2. Connect manifold to the gas pipe service valve of ODU as shown in the figure.

3. Connect manifold and Capillary tube.

Use designated capillary assembly only.

If designated capillary assembly isn't used, the system may get damaged.

4. Connect capillary and refrigerant vessel.

5. Purge hose and manifold.

6. After Is displayed, open the valve and charge the refrigerant

manifold

Capillary Assembly

Gas Pip

Gas Pipe

Liquid Pip

Liquid Pipe

Gas Pipe

Liquid Pipe

CAUTION

1. Guaranteed temperature range (Error will occur if temperature is out of range)

IDU : 20°C(68°F) ~ 32°C(90°F)

ODU : 0°C(32°F) ~ 43°C (109°F)

This temperature range is specifically for accurate refrigerant charging and is irrelative of opera-

tion temperature range

2. For refrigerant charging, use designated device only. (Capillary Assembly Set)

3. Set the IDU wired remote controller temperature sensing mode as IDU

4. Be careful that IDU should not be thermo off.

n Error contents about auto refrigerant charging function

1. : Temperature Range Error (In case that IDU or ODU is out of range)

2. : Low Pressure Descent Error (In case the system runs at low pressure limit for over 10 minutes)

3. : Judging rapid refrigerant inflow ( In case the liquid refrigerant flows in because of not using desig-

nated Capillary Assembly)

4. : Instability Error( In case the high/low pressure target doesn't get satisfied for some time

after the starting operation)

86 Outdoor Unit

Test Run

Refrigerant Checking Function

This function judges refrigerant leakage and overcharging

It can be used with refrigerant auto charging function.

Inspection Start

Press black button for 2 seconds

Proper Temperature

Thermo off indoor unit

Decide Refrigerant Quantity

Indoor Unit OFF

Too much

Refrigerant

Not enough

Refrigerant

Cannot tell

Quantity

Refrigerant

Quantity

Normal

Gas/Liquid

pipe direct

connection

Based on Refrigerant Quantity

YES

Display Error

Press black button for 2 seconds

Data Reset and Wait

End

Note

1. 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.

DIP Switch Settings

Warning : Please reset Main PCB before starting this function

ENGLISH

Installation Manual 87

Test Run

[ Error contents about auto refrigerant charging function ]

1. : Temperature Range Error (In case that IDU or ODU is out of range)

2. : System Unstable Error (In case, After 45 min operating the system, it does not be stable)

How to Cope with Result of Refrigerant checking

1. If the temperature is not in guaranteed Temperature range, the system will not execute Refrigerant check-

ing and the system will be OFF.

2. Excess of Refrigerant(619)

After remove the 20% of calculated total refrigerant, recharge the refrigerant by using Refrigerant Auto

Charging Function.

3. Scarcity of Refrigerant(629)

Charge the refrigerant by using Refrigerant Auto Charging Function.

4. Impossible to Judge(639)

IF the system is not in order, check the other problem except refrigerant.

CAUTION

1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range)

IDU : 20°C(68°F) ~ 32°C(90°F)

ODU : 0°C(32°F) ~ 43°C (109°F)

2. Set IDU wired remote controller temperature sensor setting as 'IDU'.

3. Make certain that IDU doesn't run with thermo off mode during operation.

88 Outdoor Unit

Test Run

Integrated Test Running Function_Cooling Mode (Setting 3)

This function is checking process for normal operation of parts and system On operating system.

• All processes carry out included refrigerant amount judge logic and check normal condition of parts on cool-

ing mode.

• This function check only normal condition of parts on heating mode.

• Saved data can check using LGMV.

Note

1. Judge the normal condition refer to report of Test Running.

Thermo off

IDU judge

Start

Temp. Condition

1 IDU operation

1 IDU operation data

(10min)

Refrigerant amount judge

during all IDU operation

data on Test Runing(15min)

Error Display

Press the black button for 2 sec

Yes

Note 1

End

Press the black button for 2 sec.

after turning off all of Dip switch.

Completed

Yes

All IDU operation on

Cooling mode

Press the black button for 2 sec

DIP Switch Settings

Warning : Please reset Main PCB before starting this function

ENGLISH

Installation Manual 89

Test Run

Integrated Test Running Function_Heating Mode (Setting 4)

This function is checking process for normal operation of parts and system On operating system.

• All processes carry out included refrigerant amount judge logic and check normal condition of parts on heating

mode.

• This function check only normal condition of parts on heating mode.

• Saved data can check using LGMV.

Start

Yes

Note 1

Error Display

End

Completed

Press the black button for 2 sec.

after turning off all of Dip switch.

Error Display

1 IDU operation

1 IDU operation data(10min)

All IDU operation data(10min)

Temp. Condition

Press the black button for 2 sec.

Note

1. Judge the normal condition refer to report of Test Running.

DIP Switch Settings

Warning : Please reset Main PCB before starting this function

90 Outdoor Unit

Test Run

Night Silent Operation

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.

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.

RPM / Time Settings

6.5 10.5

512

6.5 10.5

512

6.5 10.5

620 780

680 800

900

Step

Capacity

(Hp)

Capacity

Fan Maximum RPM

Judgment

Time(Hr)

Operation

Time(Hr)

10~14

790

Reset the power

Setting the Fan Max. RPM

Note 1)

Setting Complete

Set the DIP S/W

DIP Switch Settings

Warning : Please reset Main PCB before starting this function

Step Black Button Red Button

1 1 time 1 time

2 2 time 1 time

3 3 time 1 time

4 4 time 1 time

5 5 time 1 time

6 6 time 1 time

7 7 time 1 time

8 8 time 1 time

9 9 time 1 time

Max. RPM setting method

Note 1)

Setting Method for Fan Max. RPM

Noise

Capacity

Capacity(HP) 8 10~14

Step Max. RPM Noise(dB)

Standard 58 62

①

55 59

②

52 56

③

49 53

ENGLISH

Installation Manual 91

Test Run

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

ment or IDU addition/replacement.

Vacuum Mode

Set the DIP S/W ON

Vacuum mode setting

ODU V/V OPEN

Main EEV, SC EEV OPEN

IDU EEV OPEN

ODU power reset

Press the black button Main PCB (5 sec.)

Vacuum mode setting method Vacuum mode cancellation method

Set the DIP S/W OFF

Power reset

Vacuum mode cancellation

CAUTION

ODU operation stops during vacuum mode.

DIP Switch Settings

Warning : Please reset Main PCB before starting this function

92 Outdoor Unit

Test Run

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.

n Static pressure compensation dip S/W setting method

High static pressure mode : Set DIP S/W

Note

How to set the unit to high ESP :

1) Standard ESP (External Static Pressure) : 4mmH

O (39.2Pa)

2) High ESP (External Static Pressure) : 8mmH

O (78.4Pa)

‘

The setting of dip S/W is needed. (Refer to above operating method)

Power Reset

Set the DIP S/W ON

Static pressure compensation mode setting

method

Static pressure compensation mode cancellation

method

DIP switch OFF

Power Reset

Static pressure compensation mode is set

Static pressure compensation mode is cancelled

DIP Switch Settings

Warning : Please reset Main PCB before starting this function

ENGLISH

Installation Manual 93

Test Run

Self-Diagnosis Function

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 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

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 con-

troller ÷ 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 : outdoor unit ÷ in-

door unit

Failing to receive outdoor unit signal in indoor unit PCB

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 In-

door unit is 0 or FFFFFF

1 0 - Poor fan motor operation

Disconnecting the fan motor connector/Failure of indoor

fan motor lock

1 7 - Inlet Air temperature sensor of FAU Air temperature sensor of indoor unit is open or short

Outdoor unit related error

2 1

Master Outdoor Unit Inverter Compressor

IPM Fault

Master Outdoor Unit Inverter Compressor Drive IPM Fault

Slave1 Outdoor Unit Inverter Compressor

IPM Fault

Slave1 Outdoor Unit Inverter Compressor Drive IPM Fault

Slave2 Outdoor Unit Inverter Compressor

IPM Fault

Slave2 Outdoor Unit Inverter Compressor Drive IPM Fault

2 2

Inverter Board Input Over Current(RMS) of

Master Outdoor Unit

Master Outdoor Unit Inverter Board Input Current excess

(RMS)

Inverter Board Input Over Current(RMS) of

Slave1 Outdoor Unit

Slave1 Outdoor Unit Inverter Board Input Current excess

(RMS)

Inverter Board Input Over Current(RMS) of

Slave2 Outdoor Unit

Slave2 Outdoor Unit Inverter Board Input Current excess

(RMS)

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

94 Outdoor Unit

Test Run

DC charging is not performed at Master Outdoor Unit

after starting relay turn on.

DC charging is not performed at Slave1 Outdoor Unit

after starting relay turn on.

DC charging is not performed at Slave2 Outdoor Unit

after starting relay turn on.

System is turned off by Master Outdoor Unit high pres-

sure switch.

System is turned off by slave1 Outdoor Unit high pres-

sure switch.

System is turned off by slave2 Outdoor Unit high pres-

sure switch.

Master Outdoor Unit(208/230V) input voltage is over 300V or below 140V

Master Outdoor Unit(460V) input voltage is over 487V or below 270V

Slave1 Outdoor Unit(208/230V) input voltage is over 300V or below 140V

Slave1 Outdoor Unit(460V) input voltage is over 487V or below 270V

Slave2 Outdoor Unit(208/230V) input voltage is over 300V or below 140V

Slave2 Outdoor Unit(460V) input voltage is over 487V or below 270V

The First Start Failure by Master Outdoor Unit Inverter

Compressor Abnormality

The First Start Failure by Slave1 Outdoor Unit Inverter

Compressor Abnormality

The First Start Failure by Slave2 Outdoor Unit Inverter

Compressor Abnormality

System is turned off by Master Outdoor Unit DC Volt-

age Over Charging

System is turned off by Slave1 Outdoor Unit DC Volt-

age Over Charging

System is turned off by Slave2 Outdoor Unit DC Volt-

age Over Charging

Master Outdoor Unit Inverter Compressor Fault OR

Drive Fault

Slave1 Outdoor Unit Inverter Compressor Fault OR

Drive Fault

Slave2 Outdoor Unit Inverter Compressor Fault OR

Drive Fault

Master Outdoor Unit Inverter Com-

pressor DC link Low Voltage

Slave1 Outdoor Unit Inverter Com-

pressor DC link Low Voltage

Slave2 Outdoor Unit Inverter Com-

pressor DC link Low Voltage

Master Outdoor Unit High Pres-

sure Switch

Slave1 Outdoor Unit High Pres-

sure Switch

Slave2 Outdoor Unit High Pres-

sure Switch

Master Outdoor Unit Input Voltage

High/ Low Voltage

Slave1 Outdoor Unit Input Voltage

High/ Low Voltage

Slave2 Outdoor Unit Input Voltage

High/ Low Voltage

Master Outdoor Unit Inverter Com-

pressor Start Failure

Slave1 Outdoor Unit Inverter Com-

pressor Start Failure

Slave2 Outdoor Unit Inverter Com-

pressor Start Failure

Master Outdoor Unit Inverter DC

link High Voltage

Slave1 Outdoor Unit Inverter DC

link High Voltage

Slave2 Outdoor Unit Inverter DC

link High Voltage

Master Outdoor Unit Inverter Com-

pressor Over Current

Slave1 Outdoor Unit Inverter Com-

pressor Over Current

Slave2 Outdoor Unit Inverter Com-

pressor Over Current

Display Title Cause of Error

2 3 2

2 4 2

2 5 2

2 6 2

2 8 2

2 9 2

Outdoor unit related error

System is turned off by Master Outdoor Uunit Constant Speed Com-

pressor2 High Discharge Temperature

System is turned off by Slave1 Outdoor Unit Constant Speed Com-

pressor2 High Discharge Temperature

System is turned off by Slave2 Outdoor Unit Constant Speed Com-

pressor2 High Discharge Temperature

System is turned off by Master Outdoor Unit Inverter Compressor

High Discharge Temperature

System is turned off by Slave1 Outdoor Unit Inverter Compressor

High Discharge Temperature

System is turned off by Slave2 Outdoor Unit Inverter Compressor

High Discharge Temperature

Master Outdoor Unit Constant Speed Com-

pressor2 High Discharge Temperature

Slave1 Outdoor Unit Constant Speed Com-

pressor2 High Discharge Temperature

Slave2 Outdoor Unit Constant Speed Com-

pressor2 High Discharge Temperature

Master Outdoor Unit Inverter Compressor

High Discharge Temperature

Slave1 Outdoor Unit Inverter Compressor

High Discharge Temperature

Slave2 Outdoor Unit Inverter Compressor

Discharge High Temperature

3 0 2

3 2 2

ENGLISH

Installation Manual 95

Test Run

System is turned off by excessive increase of high pressure of Mas-

ter Outdoor Unit

System is turned off by excessive increase of high pressure of

Slave1 Outdoor Unit

System is turned off by excessive increase of high pressure of

Slave2 Outdoor Unit

System is turned off by excessive decrease of low pressure of Mas-

ter Outdoor Unit

System is turned off by excessive decrease of low pressure of

Slave1 Outdoor Unit

System is turned off by excessive decrease of low pressure of

Slave2 Outdoor Unit

Master Outdoor Unit stayed under low condensing limit for 3 minutes

Slave1 Outdoor Unit stayed under low condensing limit for 3 minutes

Slave2 Outdoor Unit stayed under low condensing limit for 3 minutes

High Pressure of Master Outdoor Unit

High Pressure of Slave1 Outdoor Unit

High Pressure of Slave2 Outdoor Unit

Low Pressure of Master Outdoor Unit

Low Pressure of Slave1 Outdoor Unit

Low Pressure of Slave2 Outdoor Unit

Master Outdoor Unit Low Condensing

Ratio Limited

Slave1 Outdoor Unit Low Condensing

Ratio Limited

Slave2 Outdoor Unit Low Condensing

Ratio Limited

3 4 2

3 5 2

3 6 2

System is turned off by Master Outdoor Uunit Constant Speed Com-

pressor1 High Discharge Temperature

System is turned off by Slave1 Outdoor Unit Constant Speed Com-

pressor1 High Discharge Temperature

System is turned off by Slave2 Outdoor Unit Constant Speed Com-

pressor1 High Discharge Temperature

Master Outdoor Unit Constant Speed Com-

pressor1 High Discharge Temperature

Slave1 Outdoor Unit Constant Speed Com-

pressor1 High Discharge Temperature

Slave2 Outdoor Unit Constant Speed Com-

pressor1 High Discharge Temperature

Display Title Cause of Error

3 3 2

Outdoor unit related error

Master Outdoor Unit Inverter Compressor CT Sensor open or

short

Slave1 Outdoor Unit Inverter Compressor CT Sensor open or

short

Slave2 Outdoor Unit Inverter Compressor CT Sensor open or

short

Master Outdoor Unit Inverter Compressor

CT Sensor Fault

Slave1 Outdoor Unit Inverter Compressor

CT Sensor Fault

Slave2 Outdoor Unit Inverter Compressor

CT Sensor Fault

4 0 2

4 1 2

4 2 2

4 3 2

Master Outdoor Unit Inverter Compressor Discharge Tempera-

ture Sensor open or short

Slave1 Outdoor Unit Inverter Compressor Discharge Tempera-

ture Sensor open or short

Slave2 Outdoor Unit Inverter Compressor Discharge Tempera-

ture Sensor open or short

Master Outdoor Unit Low Pressure Sensor open or short

Slave1 Outdoor Unit Low Pressure Sensor open or short

Slave2 Outdoor Unit Low Pressure Sensor open or short

Master Outdoor Unit High Pressure Sensor open or short

Slave1 Outdoor Unit High Pressure Sensor open or short

Slave2 Outdoor Unit High Pressure Sensor open or short

Master Outdoor Unit Inverter Compressor

Discharge Temperature Sensor Fault

Slave1 Outdoor Unit Inverter Compressor

Discharge Temperature Sensor Fault

Slave2 Outdoor Unit Inverter Compressor

Discharge Temperature Sensor Fault

Master Outdoor Unit Low Pressure Sen-

sor Fault

Slave1 Outdoor Unit Low Pressure Sen-

sor Fault

Slave2 Outdoor Unit Low Pressure Sen-

sor Fault

Master Outdoor Unit High Pressure Sen-

sor Fault

Slave1 Outdoor Unit High Pressure Sen-

sor Fault

Slave2 Outdoor Unit High Pressure Sen-

sor Fault

96 Outdoor Unit

Test Run

Display Title Cause of Error

Outdoor unit related error

Master Outdoor Unit Air Temperature Sensor open or

short

Slave1 Outdoor Unit Air Temperature Sensor open or

short

Slave2 Outdoor Unit Air Temperature Sensor open or

short

Master Outdoor Unit Heat Exchanger Temperature

Sensor(Front side) open or short

Slave1 Outdoor Unit Heat Exchanger Temperature

Sensor (Front side) open or short

Slave2 Outdoor Unit Heat Exchanger Temperature

Sensor(Front side) open or short

Master Outdoor Unit Suction Temperature Sensor open

or short

Slave1 Outdoor Unit Suction Temperature Sensor open

or short

Slave2 Outdoor Unit Suction Temperature Sensor open

or short

Master Outdoor Unit Constant Speed Compressor1

Discharge Temperature Sensor open or short

Slave1 Outdoor Unit Constant Speed Compressor1

Discharge Temperature Sensor open or short

Slave2 Outdoor Unit Constant Speed Compressor1

Discharge Temperature Sensor open or short

Master Outdoor Unit Constant Speed Compressor 2

Discharge Temperature Sensor open or short

Slave1 Outdoor Unit Constant Speed Compressor 2

Discharge Temperature Sensor open or short

Slave2 Outdoor Unit Constant Speed Compressor 2

Discharge Temperature Sensor open or short

Master Outdoor Unit IPM Temperature Sensor

short/open

Slave1 Outdoor Unit IPM Temperature Sensor

short/open

Slave2 Outdoor Unit IPM Temperature Sensor

short/open

Master Outdoor Unit Air Tempera-

ture Sensor Fault

Slave1 Outdoor Unit Air Tempera-

ture Sensor Fault

Slave2 Outdoor Unit Air Tempera-

ture Sensor Fault

Master Outdoor Unit Heat Ex-

changer Temperature Sensor

(Front side) Fault

Slave1 Outdoor Unit Heat Ex-

changer Temperature Sensor

(Front side) Fault

Slave2 Outdoor Unit Heat Ex-

changer Temperature Sensor

(Front side) Fault

Master Outdoor Unit Suction Tem-

perature Sensor Fault

Slave1 Outdoor Unit Suction Tem-

perature Sensor Fault

Slave2 Outdoor Unit Suction Tem-

perature Sensor Fault

Master Outdoor Unit Constant

Speed Compressor1 Discharge

Temperature Sensor Fault

Slave1 Outdoor Unit Constant

Speed Compressor1 Discharge

Temperature Sensor Fault

Slave2 Outdoor Unit Constant

Speed Compressor1 Discharge

Temperature Sensor Fault

Master Outdoor Unit Constant

Speed Compressor2 Discharge

Temperature Sensor Fault

Slave1 Outdoor Unit Constant

Speed Compressor2 Discharge

Temperature Sensor Fault

Slave2 Outdoor Unit Constant

Speed Compressor2 Discharge

Temperature Sensor Fault

Master Outdoor Unit Faulty IPM

Temperature Sensor

Slave1 Outdoor Unit Faulty IPM

Temperature Sensor

Slave2 Outdoor Unit Faulty IPM

Temperature Sensor

4 4 2

4 5 2

4 6 2

4 7 2

4 8 2

4 9 2

ENGLISH

Installation Manual 97

Omitting connection of Master outdoor unit

Omitting connection of Slave1 Outdoor Unit

Omitting connection of Slave2 Outdoor Unit

Excessive connection of indoor units compared to ca-

pacity of Outdoor Unit

Failing to receive inverter signal at main PCB of Master

Outdoor Unit

Failing to receive inverter signal at main PCB of Slave1

Outdoor Unit

Failing to receive inverter signal at main PCB of Slave2

Outdoor Unit

Failing to receive indoor unit signal at main PCB of

Outdoor Unit .

Reverse connection or omitting connection of R, S, T

power of Master Outdoor Unit

Reverse connection or omitting connection of R, S, T

power of Slave1 Outdoor Unit

Reverse connection or omitting connection of R, S, T

power of Slave2 Outdoor Unit

Master Outdoor Unit Controller part cannot receive inverter

control signals (usually happens after on-boarding)

Slave1 Outdoor Unit Controller part cannot receive inverter

control signals (usually happens after on-boarding)

Slave2 Outdoor Unit Controller part cannot receive inverter

control signals (usually happens after on-boarding)

In the case of installing smaller outdoor unit as master

unit

Access Error of Inverter PCB of Master Outdoor Unit

Access Error of Inverter PCB of Slave1 Outdoor Unit

Access Error of Inverter PCB of Slave2 Outdoor Unit

Restriction of Master Outdoor Unit

Restriction of Slave1 Outdoor Unit

Restriction of Slave2 Outdoor Unit

Constant1 CT Sensor open or short of Master Outdoor

Unit

Constant1 CT Sensor open or short of Slave1 Outdoor

Unit

Constant1 CT Sensor open or short of Slave2 Outdoor

Unit

Omitting connection of R, S, T

power of Master Outdoor Unit

Omitting connection of R, S, T

power of Slave1 Outdoor Unit

Omitting connection of R, S, T

power of Slave2 Outdoor Unit

Excessive capacity of indoor

units

Transmission error : inverter

PCB ’ Main PCB

Transmission error : inverter

PCB ’ Main PCB

Transmission error : inverter

PCB ’ Main PCB

Transmission error : indoor unit ’

main PCB of Outdoor Unit

Reverse connection of R, S, T

power of Master Outdoor Unit

Reverse connection of R, S, T

power of Slave1 Outdoor Unit

Reverse connection of R, S, T

power of Slave2 Outdoor Unit

Master Outdoor Unit Communication

Error with Inverter Controller

Slave1 Outdoor Unit Communication

Error with Inverter Controller

Slave2 Outdoor Unit Communication

Error with Inverter Controller

Error of series installation

Inverter PCB EEPROM Error of

Master Outdoor Unit

Inverter PCB EEPROM Error of

Slave1 Unit

Inverter PCB EEPROM Error of

Slave2 Unit

Master Outdoor Unit Fan Lock

Slave1 Outdoor Unit Fan Lock

Slave2 Outdoor Unit Fan Lock

Constant1 CT Sensor Error of

Master Outdoor Unit

Constant1 CT Sensor Error of

Slave1 Outdoor Unit

Constant1 CT Sensor Error of

Slave2 Outdoor Unit

Display Title Cause of Error

5 0 2

5 1 1

5 2 2

5 3 1

5 4 2

5 7 2

6 0 2

6 7 2

6 9 2

5 9 1

Outdoor unit related error

Test Run

98 Outdoor Unit

Test Run

Constant2 CT Sensor open or short of Master Outdoor

Unit

Constant2 CT Sensor open or short of Slave1 Outdoor

Unit

Constant2 CT Sensor open or short of Slave2 Outdoor

Unit

Instant Over Current(Peak) of Master Outdoor Unit

PFC

Instant Over Current(Peak) of Slave1 Outdoor Unit

PFC

Instant Over Current(Peak) of Slave2 Outdoor Unit

PFC

Master Outdoor Unit Fan CT Sensor open or short

Slave1 Outdoor Unit Fan CT Sensor open or short

Slave2 Outdoor Unit Fan CT Sensor open or short

Constant2 CT Sensor Error of

Master Outdoor Unit

Constant2 CT Sensor Error of

Slave1 Outdoor Unit

Constant2 CT Sensor Error of

Slave2 Outdoor Unit

Instant Over Current(Peak) of

Master Outdoor Unit PFC

Instant Over Current(Peak) of

Slave1 Outdoor Unit PFC

Instant Over Current(Peak) of

Slave2 Outdoor Unit PFC

Master Outdoor Unit Fan CT Sen-

sor Error

Slave1 Outdoor Unit Fan CT Sen-

sor Error

Slave2 Outdoor Unit Fan CT Sen-

sor Error

Display Title Cause of Error

7 0 2

7 3 2

7 5 2

7 6 2

7 7 2

7 9 2

8 6 2

8 7 2

Outdoor unit related error

Master Outdoor Unit Fan DC Link High Voltage Error

Slave1 Outdoor Unit Fan DC Link High Voltage Error

Slave2 Outdoor Unit Fan DC Link High Voltage Error

Master Outdoor Unit Fan DC Link

High Voltage Error

Slave1 Outdoor Unit Fan DC Link

High Voltage Error

Slave2 Outdoor Unit Fan DC Link

High Voltage Error

Master Outdoor Unit Fan Current is over 10A

Slave1 Outdoor Unit Fan is over 10A

Slave2 Outdoor Unit Fan is over 10A

Master Outdoor Unit Fan Over

Current Error

Slave1 Outdoor Unit Fan Over

Current Error

Slave2 Outdoor Unit Fan Over

Current Error

Master Outdoor Unit Fan First Position Sensing Failure

Slave1 Outdoor Unit Fan First Position Sensing Failure

Slave2 Outdoor Unit Fan First Position Sensing Failure

Communication Fail Between Master Outdoor Unit

Main MICOM and EEPROM or omitting EEPROM

Communication Fail Between Slave1 Outdoor Unit

Main MICOM and EEPROM or omitting EEPROM

Communication Fail Between Slave2 Outdoor Unit

Main MICOM and EEPROM or omitting EEPROM

Communication Fail Between Master Outdoor Unit Fan

MICOM and EEPROM or omitting EEPROM

Communication Fail Between Slave1 Outdoor Unit Fan

MICOM and EEPROM or omitting EEPROM

Communication Fail Between Slave2 Outdoor Unit Fan

MICOM and EEPROM or omitting EEPROM

Master Outdoor Unit Fan Start

Failure Error

Slave1 Outdoor Unit Fan Start

Failure Error

Slave2 Outdoor Unit Fan Start

Failure Error

Master Outdoor Unit Main PCB

EEPROM Error

Slave1 Outdoor Unit Main PCB

EEPROM Error

Slave2 Outdoor Unit Main PCB

EEPROM Error

Master Outdoor Unit Fan PCB

EEPROM Error

Slave1 Outdoor Unit Fan PCB

EEPROM Error

Slave2 Outdoor Unit Fan PCB

EEPROM Error

ENGLISH

Installation Manual 99

Test Run

Failing to receive Slave Unit signal at main PCB of

Master Outdoor Unit

Failing to receive master and other Slave Unit signal at

main PCB of Slave1 Outdoor Unit

Failing to receive master and other Slave Unit signal at

main PCB of Slave2 Outdoor Unit

Failing to receive fan signal at main PCB of master

unit.

Failing to receive fan signal at main PCB of Slave1

unit.

Failing to receive fan signal at main PCB of Slave2

unit.

Instant Over Current at Master Outdoor Unit Fan IPM

Instant Over Current at Slave1 Outdoor Unit Fan IPM

Instant Over Current at Slave2 Outdoor Unit Fan IPM

Master Outdoor Unit(208/230V) Fan DC Link Input Voltage is under 140V

Master Outdoor Unit(460V) Fan DC Link Input Voltage is under 380V

Slave1 Outdoor Unit(208/230V) Fan DC Link Input Voltage is under 140V

Slave1 Outdoor Unit(460V) Fan DC Link Input Voltage is under 380V

Slave2 Outdoor Unit(208/230V) Fan DC Link Input Voltage is under 140V

Slave2 Outdoor Unit(460V) Fan DC Link Input Voltage is under 380V

Liquid pipe temperature sensor of Master Outdoor

Unit is open or short

Liquid pipe temperature sensor of slave1 Outdoor Unit

is open or short

Liquid pipe temperature sensor of slave2 Outdoor Unit

is open or short

Master Outdoor Unit Subcooling Outlet Temperature

Sensor open or short

Slave1 Outdoor Unit Subcooling Outlet Temperature

Sensor open or short

Slave2 Outdoor Unit Subcooling Outlet Temperature

Sensor open or short

Pressure unbalance between Outdoor Units

Communication Error Between

Master Outdoor Unit and Other

Outdoor Unit

Communication Error Between

Slave1 Outdoor Unit and Other

Outdoor Unit

Communication Error Between

Slave2 Outdoor Unit and Other

Outdoor Unit

Master Outdoor Unit Fan PCB

Communication Error

Slave1 Outdoor Unit Fan PCB

Communication Error

Slave2 Outdoor Unit Fan PCB

Communication Error

Master Outdoor Unit FAN IPM

Fault Error

Slave1 Outdoor Unit FAN IPM

Fault Error

Slave2 Outdoor Unit FAN IPM

Fault Error

Master Outdoor Unit Fan DC Link

Low Voltage Error

Slave1 Outdoor Unit Fan DC Link

Low Voltage Error

Slave2 Outdoor Unit Fan DC Link

Low Voltage Error

Master Outdoor Unit Liquid pipe

Temperature Sensor Error

Slave1 Outdoor Unit Liquid pipe

Temperature Sensor Error

Slave2 Outdoor Unit Liquid pipe

Temperature Sensor Error

Master Outdoor Unit Subcooling

Outlet Temperature Sensor Error

Slave1 Outdoor Unit Subcooling

Outlet Temperature Sensor Error

Slave2 Outdoor Unit Subcooling

Outlet Temperature Sensor Error

Failure of operation mode conver-

sion at Master Outdoor Unit

Failure of operation mode conver-

sion at Slave1 Outdoor Unit

Failure of operation mode conver-

sion at Slave2 Outdoor Unit

Display Title Cause of Error

1 0 4 2

1 0 5 2

1 0 6 2

1 0 7 2

1 1 3 2

1 1 5 2

1 5 1 2

Outdoor unit related error

100 Outdoor Unit

Test Run

Display Title Cause of Error

1 7 3

Master Outdoor Unit Constant Speed

Compressor Fault

Comp locking, Check Valve leakage, comp dielectric break

down at Master Outdoor Unit

Slave1 Outdoor Unit Constant Speed

Compressor Fault

Comp locking, Check Valve leakage, comp dielectric at

Slave1 Outdoor Unit

Slave2 Outdoor Unit Constant Speed

Compressor Fault

Comp locking, Check Valve leakage, comp dielectric at

Slave2 Outdoor Unit

1 7 4

Master outdoor unit rated speed 2 con-

denser over-current

Master Outdoor Unit rated speed 2 condenser burned /

locked or fault by over-current

Slave1 outdoor unit rated speed 2 con-

denser over-current

Slave1 Outdoor Unit rated speed 2 condenser burned /

locked or fault by over-current

Slave2 outdoor unit rated speed 2 con-

denser over-current

Slave2 Outdoor Unit rated speed 2 condenser burned /

locked or fault by over-current

1 8 2

Master outdoor unit Main Board Main-

Sub Micom communication error

Master Outdoor Unit Main Board Main-Sub Micom commu-

nication failed

Slave1 outdoor unit Main Board Main-

Sub Micom communication error

Slave1 Outdoor Unit Main Board Main-Sub Micom commu-

nication failed

Slave2 outdoor unit Main Board Main-

Sub Micom communication error

Slave2 Outdoor Unit Main Board Main-Sub Micom commu-

nication failed

1 9 3

Excessive increase of Master Outdoor

Unit Fan PCB Heat Sink Temperature

Master Outdoor Unit Fan Inverter PCB Temperature is

Over 95°C

Excessive increase of Slave1 Outdoor

Unit Fan PCB Heat Sink Temperature

Slave1 Outdoor Unit Fan Inverter PCB Temperature is

Over 95°C

Excessive increase of Slave2 Outdoor

Unit Fan PCB Heat Sink Temperature

Slave2 Outdoor Unit Fan Inverter PCB Temperature is

Over 95°C

1 9 4

Master Outdoor Unit Fan PCB Heat Sink

Temperature Sensor Error

Master Outdoor Unit Fan PCB Heat Sink Temperature

Sensor open or short

Slave1 Outdoor Unit Fan PCB Heat Sink

Temperature Sensor Error

Slave1 Outdoor Unit Fan PCB Heat Sink Temperature

Sensor open or short

Slave2 Outdoor Unit Fan PCB Heat Sink

Temperature Sensor Error

Slave2 Outdoor Unit Fan PCB Heat Sink Temperature

Sensor open or short

Outdoor unit related error

ENGLISH

Installation Manual 101

New Function

n Multi V III provides as following new functions.

h If you want to get more details, refer to each installation Manuals.

n Out Feature

• Cool/ Heat Selector

• ODU Dry contact

New Function Applied item

Cool/Heat selector (PRDSBM)

Cooling/ Heating/ Fan

Cooling/ Heating/ All OFF

ODU

Solution Accessory

ODU Dry contact (PQDSBDCVM0)

Demand control

-. Low load operation

-. DDC control (DC0~10V Input)

ODU

Solution Accessory

ODU Fan Low speed control

(Night low noise operation)

Error alarm

102 Outdoor Unit

New Function

1. Cool/ Heat selector

Cool/ Heat Selector has provided two different functions.

- Cooling/ heating/ Fan lock mode

- Cooling/ heating/ All OFF mode

[Installation]

1. Check the contents of Cool/ Heat Selector

2. Connect Outdoor Main PCB and Cool/ Heat Selector.

-. Connect terminals on the back side of Cool/Heat Selector to terminal of Outdoor as show

¨≠

GNDGND

¨≠

GND

< Outdoor Main PCB >

- Insert wire method -

shows field wiring

connected wiring

Push arrow direction.

Insert wire to connector.

Push Button

≠

GNDGNDGND

❈ Communication line length can be maximum 300m, use communication line as thick as 1.25mm

[setting]

1. Set DIP S/W according to DIP S/W

setting table.(5,6,11,12)

2. Push Black button on SVC PCB

3. Select number as below at 7-segment

“0” : Cooling/ Heating / Fan lock mode

“1” : Cooling/ Heating/ All OFF Mode

4. After Selecting, DIP S/W OFF(11,12 )

SW01B

SW02B

Setting Button

7-Segment

ENGLISH

Installation Manual 103

New Function

2. ODU Dry contact

ODU Dry contact has provided Three different functions.

- Demand control

- Night Low Noise control

- Error Alarm Monitoring function

[ODU Dry contact]

- Feature and Parts Naming

- Installation

1. ODU Dry contact single installation : Connect with ODU both single Unit and Series.

1. SWDIP : Switch to select main function

2. SW_Address2 : Switch to set a upper

address of the outdoor unit

3. SW_Address1 : Switch to set a lower

address of the outdoor unit

4. SW_STEP : Switch to select a control mode.

5. CN_PWR : DC Input terminal

6. ERROR : Error display with relay contact

7. BUS-A : RS-485 (+) Terminal

8. BUS-B : RS-485 (-) Terminal

9. CN_CAPACITY : Signal input terminal to

control a capacity of outdoor unit

10. CN_SPEED/CAP : Signal input terminal for

Analog Input/Low noise operation

11. CN_OUT : Outdoor unit connector

12. LED1 : Display LED for RS-485 status

13. LED01G,02G,03G : Display LED for

communication status

14. CN_JIG : Connector for writing program

15. SW1 : Reset switch

12 34 5

91011

RS-485

BUS_B

BUS_A

104 Outdoor Unit

New Function

2. ODU Dry contact with Central controller

: With Single Outdoor unit

: With Series Outdoor units

CN_OUT

TTL

Multi-V

WIRE ASSY 1(1EA)

BUS_B

BUS_A

Central

Control

Devices

Multi-V

WIRE ASSY 1(1EA)

CN_OUT

TTL

ENGLISH

Installation Manual 105

New Function

2.1 Demand Control

ODU Dry contact has provided Two different methods for Demand control

- Using Contact signal

: High/ Low pressure value s are changed by setting value of Rotary S/W

- Using Analog signal with DDC Module

: High/ Low pressure value s are changed by setting value of DDC Module.(DC 0~10V)

[Rotary S/W setting ]

- Each connecting methods

1. Using Contact signal

[Setting ]

SW_STEP Input Signal

0, 1, 2, 3, 4, 5, 6 Contact signal

D, E Analog signal

SW_STEP

Using Contact signal

Using Analog signal with DDC Module

LG does not

supply this section

(Field supply)

Notes

Do not input the voltage signal in

"NON VOLT" setting mode otherwise

it will cause serious damage

SW_VOLT2 SW_VOLT1

Input_3

Input_2

Input_1

comm

Input_LNO

comm

LG does not

supply this section

(Field supply)

SW_VOLT2 SW_VOLT1

Input_3

Input_2

Input_1

comm

Input_LNO

comm

Connect separate

External voltage of

DC12V

106 Outdoor Unit

New Function

2. Using Analog signal with DDC Module

SW_VOLT2 SW_VOLT1

Direct Digital Controller

GND

DC 0~10V

input

100%

90%

80%

70%

60%

50%

45%

40%

0V 1V 2V 3V 4V 5V 6V 7V 8V 9V 10V

0 1 23 45 67 8 910

Comp.

OFF

Non

Control

Comp.

OFF

System

OFF

Signal

Input

Step

Performance output of the ODU

100%

90%

80%

70%

60%

50%

45%

40%

0V 1V 2V 3V 4V 5V 6V 7V 8V 9V 10V

9 8 76 54 32 1 1 1

Signal

Input

Step

Performance output of the ODU

[Control Value]

- Using Contact signal

Rotary

S/W

Volt

Cooling Heating

Step Control Step Control

0 0 Not-Control 0

Not-Control

1 1 100% 0 100%

2 2 90% 0 90%

3 3 80% 0 80%

4 4 70% 0 0 70%

5 5 60% 0 60%

6 6 50% 0 50%

7 7 45% 0 45%

8 8 40% 0 40%

9 9 Comp OFF 0 Comp OFF

10 10 All OFF 0 All OFF

Rotary

S/W

Volt

Cooling Heating

Step Control Step Control

0 9 Comp OFF 0

Comp OFF

1 8 40% 0 40%

2 7 45% 0 45%

3 6 52% 0 50%

4 5 60% 0 0 60%

5 4 70% 0 70%

6 3 80% 0 80%

7 2 90% 0 90%

8 1 100% 0 100%

9 1 100% 0 100%

10 1 100% 0 100%

ENGLISH

Installation Manual 107

SW_

STEP

Input_1 Input_2 Input_3

Comp capacity

Of outdoor unit(%)

0 0 0 No control

1 0 0 70

0 1 0 40

0 0 1 COMP OFF

0 0 0 No control

1 0 0 70

0 1 0 50

0 0 1 COMP OFF

0 0 0 No control

1 0 0 80

0 1 0 50

0 0 1 COMP OFF

0 0 0 No control

100 70

10 40

1 ALL OFF

0 0 0 No control

100 70

10 50

1 ALL OFF

0 0 0 No control

100 80

10 50

1 ALL OFF

0 0 0 No control

100 50

1 0 COMP OFF

1 ALL OFF

- Using Analog signal with DDC Module

Non

Control

100%

90%

80%

70%

60%

50%

45%

40%

0V 1V 2V 3V 4V 5V 6V 7V 8V 9V 10V

0 1 23 45 67 8 910

Comp.

OFF

System

OFF

Signal

Input

Step

Performance output of the ODU

New Function

108 Outdoor Unit

2.2 Night Low Noise control

ODU Dry contact has provided Two methods for Night Low Noise Control

- Automatically operating

: Using previous method

- Manual operating

: Using simple switch and timer

[Setting]

- For ODU Dry contact

- For Outdoor unit

Refer to DIP S/W setting table

2.3 Error Alarm monitoring

ODU Dry contact has provided Error Alarm monitoring function

Notice for system fault information by buzzer or warning lamp.

Occurring fault is not only ODUs but also IDUs.

[Setting]

- Note

AC Power : 3A @250V

DC Power : 3A @30V

L1 2 3 4

Connect with S/W or Timer for

Night Low Noise Control

Notes

Default State is L1: ON, L2: ON

Position Function

L1 2 3 4

ON : Master Mode

OFF : Slave Mode

L1 2 3 4

ON : Enable Low Noise

Operation

OFF : Disable Low Noise

Operation

Error Display

Field Supply

(Depends on Operation

display power type)

Power

AC or DC

New Function

ENGLISH

Installation Manual 109

Caution For Refrigerant Leak

The installer and system specialist shall secure safety against leakage according to local regulations or standards.

The following standards may be applicable if local regulations are not available.

Though the R410A refrigerant is harmless and incombustible itself , the room to equip the air conditioner should be large to

such an extent that the refrigerant gas will not exceed the limiting concentration even if the refrigerant gas leaks in the room.

n Limiting concentration

Check limiting concentration along following steps and take appropriate measure depending on the situation.

n Calculate amount of all the replenished refrigerant (kg) per each refrigerant

system.

n Calculate minimum room capacity

Calculate room capacity by regarding a portion as one room or the smaller room.

(1) Without partition

(2) With partition and with opening which serve as

passage of air to adjoining room

Caution For Refrigerant Leak

Introduction

Checking procedure of limiting concentration

Limiting concentration is the limit of Freon gas concentration where immediate measures can be taken with-

out hurting human body when refrigerant leaks in the air. The limiting concentration shall be described in the

unit of kg/m

(Freon gas weight per unit air volume) for facilitating calculation.

Limiting concentration: 0.44kg/m

(R410A)

Outdoor unit

(No.1 system)

Flow of

refrigerant

Indoor unit

Room where refrigerant leaks

(Refrigerant of the whole No.1

system flows out.)

Amount of additional

replenished refrigerant

Total amount of replenished

refrigerant in refrigerant

facility (kg)

Note : In case one refrigerant facility is

divided into 2 or more refrigerant

systems and each system is

independent, amount of replenished

refrigerant of each system shall be

adopted.

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Opening

Partition

In the case of opening

without door , or 0.15

% or more openings

(to floor space) both

above and below door)

Amount of replenished

refrigerant per one outdoor

unit system

Amount of replenished

refrigerant at factory shipment

Amount of additionally

replenished refrigerant

depending on piping

length or piping

diameter at customer

110 Outdoor Unit

Caution For Refrigerant Leak

(3) With partition and without opening which serve as passage of air to adjoining room

n Calculate refrigerant concentration

n In case the concentration exceeds the limit

When the concentration exceeds the limit, change original plan or take one of the countermeasures

shown below:

• Countermeasure 1

Provide opening for ventilation.

Provide 0.15% or more opening to floor space both above and below door, or provide opening without

door.

• Countermeasure 2

Provide gas leak alarm linked with mechanical ventilator.

Reducing the outdoor refrigerant qty.

Pay a special attention to the place, such as a basement, etc. where refrigerant can stay, since refrigerant is

heavier than air.

Outdoor unit

Indoor unit

Smallest

room

(R410A)

≤

Refrigerant concentration

(kg/m

)

Total amount of replenished

refrigerant in refrigerant facility (kg)

Capacity of smallest room where

indoor unit is installed (m

)

In case the result of calculation exceeds

the limiting concentration, perform the

same calculations by shifting to the

second smallest, and the third smallest

rooms until at last the result is below the

limiting concentration.

Countermeasure 2

Gas leak alarm

Mechanical ventilator

Countermeasure 1

Opening effective to ventilation

Indoor unit

ENGLISH

Installation Manual 111

Installation guide at the seaside

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

2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion

on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunc-

tion or inefficient performance.

3. If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea wind. Otherwise it

needs additional anticorrosion treatment on the heat exchanger.

Selecting the location(Outdoor Unit)

1) If the outdoor unit is to be installed close to the seaside, direct exposure to the sea wind should be avoided.

Install the outdoor unit on the opposite side of the sea wind direction.

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

3) Select a well-drained place.

• It should be strong enough like concrete to prevent

the sea wind from the sea.

• The height and width should be more than 150% of

the outdoor unit.

• It should be kept more than 70 cm of space

between outdoor unit and the windbreak for easy

air flow.

Sea wind Sea wind

Sea wind

Windbreak

CAUTION

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

water.

112 Outdoor Unit

USA, press #2 for PTAC, TTW

USA, press #3 for DFS, Multi V

CANADA

888-865-3026

1-888-LG-Canada

www.lge.com

LG Customer Information Center

LGEUS

LG Electronics, Air conditioning Division

1000 Sylvan Ave., Englewood Cliffs, NJ 07632

LGECI

LG ELECTRONICS CANADA INC.

20 NORELCO DRIVE.

NORTH YORK, ONTARIO M9L 2X6.

LG Electronics ARUN072DT3

Product's Documents

User Manual

Specifications

LG Electronics ARUN072DT3 Questions and Answers

Related Products

LG Electronics RS501 Lg K20 Lra

LG Electronics LGP925G Lg Optimus 3d

LG Electronics PQDSBC1 LG Dry Contact with Economizer Interface

LG Electronics PESC0RV0 LG CO2 Sensor

LG Electronics PDRYCB400 LG Dry Contact Module 2 Contact Points 5V & 12V from Indoor PCB

LG Electronics PACS5A000 LG AC Smart 5 with Mobile Web Access and BACnet Gateway