LG MULTI V ARUV60LT3 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.

MODELS : ARUV Series

www.lg.com

P/NO : MFL46912316

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.

This symbol indicates the possibility of death or serious injury.

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

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

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

Engineering Standard" and "Interior Wire

Regulations" and the instructions given in

this manual and always use a special circuit.

Ask the dealer or an authorized technician to

install the air conditioner.

• If the power source capacity is inadequate or

electric work is performed improperly, electric

shock or fire may result.

• Improper installation by the user may result in

water leakage, electric shock, or fire.

Always ground the product.

Always intstall a dedicated circuit and breaker.

• There is risk of fire or electric shock.

• Improper wiring or installation may cause fire or

electric shock.

For re-installation of the installed product,

always contact a dealer or an Authorized

Service Center.

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.

Use the correctly rated breaker or fuse.

• There is risk of fire or failure of product.

• There is risk of fire or electric shock.

Prepare for strong wind or earthquake and

install the unit at the specified place.

Do not install the product on a defective

installation stand.

• Improper installation may cause the unit to top-

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

ple and result in injury.

product.

Installation Manual 3

Safety Precautions

When installing and moving the air condition-

er to another site, do not charge it with a

different refrigerant from the refrigerant

specified on the unit.

Do not reconstruct to change the settings of

the protection devices.

• If a different refrigerant or air is mixed with the

original refrigerant, the refrigerant cycle may

malfunction and the unit may be damaged.

• 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.

Ventilate before operating air conditioner

when gas leaked out.

Securely install the cover of control box and

the panel.

• It may cause explosion, fire, and burn.

• 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 exceed-

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

gen in the room could result.

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

Use a dedicated outlet for this appliance.

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

• There is risk of fire or electrical shock.

injury.

Be cautious that water could not enter the

product.

Do not touch the power switch with wet

hands.

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

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

damage.

injury.

When the product is soaked (flooded or

submerged), contact an Authorized Service

Center.

Be cautious not to touch the sharp edges

when installing.

• There is risk of fire or electric shock.

• It may cause injury.

Take care to ensure that nobody could step

on or fall onto the outdoor unit.

Do not open the inlet grille of the product

during operation. (Do not touch the electro-

static filter, if the unit is so equipped.)

• This could result in personal injury and product

damage.

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

product failure.

Outdoor Unit

Safety Precautions

n Installation

Always check for gas (refrigerant) leakage

Do not install the product where the noise or

hot air from the outdoor unit could damage

the neighborhoods.

after installation or repair of product.

•

Low refrigerant levels may cause failure of product.

• It may cause a problem for your neighbors.

Keep level even when installing the product.

Do not install the unit where combustible gas

may leak.

• To avoid vibration or water leakage.

• If the gas leaks and accumulates around the

unit, an explosion may result.

Use power cables of sufficient current

carrying capacity and rating.

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.

• Cables that are too small may leak, generate

heat, and cause a fire.

• There is risk of damage or loss of property.

Keep the unit away from children. The heat

exchanger is very sharp.

When installting the unit in a hospital, com-

munication station, or similar place, provide

sufficient protection against noise.

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

Also the damaged fin may result in degradation

of capacity.

•

The inverter equipment, private power generator, high-fre-

quency medical equipment, or radio communication equip-

ment may cause the air conditioner to operate erroneous-

ly, 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

Do not block the inlet or outlet.

environments.

•

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

the performance of the air conditioner or damage its parts.

• 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.

Be sure the installation area does not deteri-

orate with age.

• Inadequate connection and fastening may gen-

•

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

ing property damage, product failure, or personal injury.

erate heat and cause a fire.

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.

Installation Manual 5

Safety Precautions

Be very careful about product transportation.

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

• 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.

Safely dispose of the packing materials.

Turn on the power at least 6 hours before

starting operation.

•

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.

• 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.

Do not touch any of the refrigerant piping

during and after operation.

Do not operate the air conditioner with the

panels or guards removed.

• It can cause a burn or frostbite.

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

injuries.

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.

Do not insert hands or other objects through

the air inlet or outlet while the air conditioner

is plugged in.

• Be careful and avoid personal injury.

• There are sharp and moving parts that could

cause personal injury.

Outdoor Unit

Installation Process

Indicate clearly who is to be responsible for switch settings

Determination of division work

Make relationship between outdoor, indoor, remote controller, and option connections clear.

(Prepare control circuit diagram)

Preparation of contract drawings

Take account of gradient

of drain piping

The foundation must be level even

Sleeve and insert work

Outdoor unit foundation work

Installation of outdoor unit

Check model name to make

sure the fitting is made correctly

Avoid short circuits and ensure

sufficient space is allowed for service

Installation of indoor unit

Special attention to dryness,

cleanness and tightness

Refrigerant piping work

Drain pipe work

Duct work

Adjust to downward gradient

Make sure airflow is sufficient

Make sure no gaps are left where

the insulating materials are joined

Heat insulation work

Electrical work

(connection circuits and drive circuits)

Multiple core cable must not be used.

(suitable cable should be selected)

Airtight test

Vacuum drying

In the final check for 24hours at 3.8 MPa(38.7 kgf/cm ) there must be no drop in pressure.

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

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

Additional charge of refrigerant

Fit facing panels

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

Refer to automatic addressing flowchart

Automatic addressing of indoor unit

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

Test run adjustment

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

Transfer to customer with explanation

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

documentation is in order

• 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 pres-

sure 3.8MPa.

• 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.)

Installation Manual 7

Outdoor units Information

n Combination Ration(50~200%)

Outdoor Number

Single outdoor units

Double outdoor units

Triple outdoor units

Connection Capacity

200%

160%

130%

Notes:

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

If you want to connect more than 130% combination, please contact us and discuss the require-

ment like below.

1) If the operation of indoor unit is more than 130%, low airflow operation is recommended in all

the indoor units.

2) If the operation of indoor unit is more than 130%, additional refrigerant is needed according to

the headquarter guidance.

3)Over 130%, capacity is same as capacity of 130%, Same remark is valid for power input.

Caution : ARUV60LT3, ARUV80LT3 Models should be installed only a single unit.

Power Supply: Outdoor Unit (3Ø, 380 - 415V, 50Hz/3Ø, 380V, 60Hz)

n Cooling Only

Unit

1 Outdoor unit

System(HP)

Model

ARUV60LT3

ARUV80LT3

ARUV100LT3

ARUV₁1₆00LT3

ARUV120LT3

ARUV₂1₀20LT3

Max. Connectable No. of Indoor Units

Net Weight

155 x 1

185 x 1

408 x 1

235 x 1

518 x 1

lbs

341 x 1

Dimensions (WxHxD)

Connecting Pipes

(620 x 1,680 x 760) x 1

(24.4 x 66.1 x 29.9) x 1

9.52(3/8)

(620 x 1,680 x 760) x 1

(24.4 x 66.1 x 29.9) x 1

9.52(3/8)

(920 x 1,680 x 760) x 1

(36.2 x 66.1 x 29.9) x 1

9.52(3/8)

(920 x 1,680 x 760) x 1

(36.2 x 66.1 x 29.9) x 1

12.7(1/2)

inch

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

19.05(3/4)

22.2(7/8)

28.58(1 1/8)

Unit

1 Outdoor Unit

System(HP)

Model

ARUV140LT3

ARUV₂1₃40LT3

ARUV160LT3

ARUV₂1₆60LT3

ARUV180LT3

ARUV₂1₉80LT3

ARUV200LT3

ARUV₃2₂00LT3

Max. Connectable No. of Indoor Units

Net Weight

235 x 1

518 x 1

265 x 1

584 x 1

315 x 1

694 x 1

315 x 1

694 x 1

lbs

Dimensions (WxHxD)

Connecting Pipes

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

inch

(36.2 x 66.1 x 29.9) x 1

12.7(1/2)

(48.8 x 66.1 x 29.9) x 1

12.7(1/2)

(48.8 x 66.1 x 29.9) x 1

15.88(5/8)

(48.8 x 66.1 x 29.9) x 1

15.88(5/8)

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

28.58(1 1/8)

Outdoor Unit

Outdoor Units Information

Unit

2 Outdoor Unit

System(HP)

Model

ARUV220LT3

ARUV120LT3

ARUV₃1₅00LT3

ARUV240LT3

ARUV140LT3

ARUV₃1₉00LT3

ARUV260LT3

ARUV140LT3

ARUV₄1₂20LT3

ARUV280LT3

ARUV140LT3

ARUV₄1₅40LT3

Max. Connectable No. of Indoor Units

Net Weight

185 x 1 + 235 x 1

408 x 1 + 518 x 1

(920 x 1,680 x 760) x 2

(36.2 x 66.1 x 29.9) x 2

15.88(5/8)

185 x 1 + 235 x 1

408 x 1 + 518 x 1

(920 x 1,680 x 760) x 2

(36.2 x 66.1 x 29.9) x 2

15.88(5/8)

235 x 2

518 x 2

235 x 2

518 x 2

lbs

Dimensions (WxHxD)

Connecting Pipes

(920 x 1,680 x 760) x 2

(36.2 x 66.1 x 29.9) x 2

19.05(3/4)

(920 x 1,680 x 760) x 2

(36.2 x 66.1 x 29.9) x 2

19.05(3/4)

inch

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

28.58(1 1/8)

34.9(1 3/8)

Unit

2 Outdoor Unit

System(HP)

Model

ARUV300LT3

ARUV160LT3

ARUV₄1₉40LT3

ARUV320LT3

ARUV180LT3

ARUV₅1₂40LT3

ARUV340LT3

ARUV200LT3

ARUV₅1₅40LT3

ARUV360LT3

ARUV200LT3

ARUV₅1₈60LT3

Max. Connectable No. of Indoor Units

Net Weight

lbs

235 x 1 + 265 x 1

518 x 1 + 584 x 1

235 x 1 + 315 x 1

518 x 1 + 694 x 1

235 x 1 + 315 x 1

518 x 1 + 694 x 1

265 x 1 + 315 x 1

584 x 1 + 694 x 1

Dimensions (WxHxD)

(920 x 1,680 x 760) x 1

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

(1,240 x 1,680 x 760) x 1 (1,240 x 1,680 x 760) x 1 (1,240 x 1,680 x 760) x 1

inch

(36.2 x 66.1 x 29.9) x 1

(48.8 x 66.1 x 29.9) x 1

19.05(3/4)

(36.2 x 66.1 x 29.9) x 1

(48.8 x 66.1 x 29.9) x 1

19.05(3/4)

(36.2 x 66.1 x 29.9) x 1

(48.8 x 66.1 x 29.9) x 1

19.05(3/4)

(48.8 x 66.1 x 29.9) x 2

Connecting Pipes

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

19.05(3/4)

41.3(1 5/8)

34.9(1 3/8)

Unit

2 Outdoor Unit

3 Outdoor Unit

System(HP)

Model

ARUV380LT3

ARUV200LT3

ARUV180LT3

ARUV400LT3

ARUV200LT3

ARUV420LT3

ARUV140LT3

ARUV₆1₄40LT3

ARUV440LT3

ARUV160LT3

ARUV140LT3

ARUV₆1₄40LT3

Max. Connectable No. of Indoor Units

Net Weight

lbs

340 × 1 + 350 × 1

749 × 1 + 771 × 1

350 × 2

270 × 3

270 × 2 + 340 × 1

771 × 2

595 × 3

595 × 2 + 749 × 1

Dimensions (WxHxD)

(1,240 × 1,680 × 760) × 2 (1,240 × 1,680 × 760) × 2 (1,240 × 1,680 × 760) × 3 (1,240 × 1,680 × 760) × 3

inch

(48.8 × 66.1 × 29.9) × 2

19.05(3/4)

(48.8 × 66.1 × 29.9) × 2

19.05(3/4)

(48.8 × 66.1 × 29.9) × 3 (48.8 × 66.1 × 29.9) × 3

Connecting Pipes

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

19.05(3/4)

41.3(1 5/8)

19.05(3/4)

41.3(1 5/8)

Unit

3 Outdoor Unit

System(HP)

Model

ARUV460LT3

ARUV180LT3

ARUV140LT3

ARUV₆1₄40LT3

ARUV480LT3

ARUV200LT3

ARUV140LT3

ARUV₆1₄40LT3

ARUV500LT3

ARUV200LT3

ARUV160LT3

ARUV₆1₄40LT3

ARUV520LT3

ARUV200LT3

ARUV180LT3

ARUV₆1₄40LT3

Max. Connectable No. of Indoor Units

Net Weight

lbs

235 x 2 + 315 x 1

518 x 2 + 694 x 1

235 x 2 + 315 x 1

518 x 2 + 694 x 1

235 x 1 + 265 x 1 + 315 x 1

518 x 1 + 584 x 1 + 694 x 1

(920 x 1,680 x 760) x 1

235 x 1 + 315 x 2

518 x 1 + 694 x 2

Dimensions (WxHxD)

(920 x 1,680 x 760) x 2

(920 x 1,680 x 760) x 1

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

inch

(36.2 x 66.1 x 29.9) x 2

(48.8 x 66.1 x 29.9) x 1

19.05(3/4)

(36.2 x 66.1 x 29.9) x 2

(48.8 x 66.1 x 29.9) x 1

19.05(3/4)

(36.2 x 66.1 x 29.9) x 1

(48.8 x 66.1 x 29.9) x 2

19.05(3/4)

(36.2 x 66.1 x 29.9) x 1

(48.8 x 66.1 x 29.9) x 2

19.05(3/4)

Connecting Pipes

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

41.3(1 5/8)

Installation Manual 9

Outdoor Units Information

Unit

3 Outdoor Unit

System(HP)

Model

ARUV540LT3

ARUV200LT3

ARUV140LT3

ARUV560LT3

ARUV200LT3

ARUV160LT3

ARUV580LT3

ARUV200LT3

ARUV180LT3

ARUV600LT3

ARUV200LT3

Max. Connectable No. of Indoor Units

Net Weight

lbs

235 x 1 + 315 x 2

518 x 1 + 694 x 2

265 x 1 + 315 x 2

584 x 1 + 694 x 2

315 x 3

694 x 3

Dimensions (WxHxD)

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

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

inch

(36.2 x 66.1 x 29.9) x 1

(48.8 x 66.1 x 29.9) x 2

19.05(3/4)

(48.8 x 66.1 x 29.9) x 3

Connecting Pipes

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

19.05(3/4)

41.3(1 5/8)

19.05(3/4)

41.3(1 5/8)

19.05(3/4)

41.3(1 5/8)

Unit

4 Outdoor Unit

System(HP)

Model

ARUV620LT3

ARUV200LT3

ARUV140LT3

ARUV₆1₄40LT3

ARUV640LT3

ARUV200LT3

ARUV160LT3

ARUV140LT3

ARUV₆1₄40LT3

ARUV660LT3

ARUV200LT3

ARUV180LT3

ARUV140LT3

ARUV₆1₄40LT3

ARUV680LT3

ARUV200LT3

ARUV140LT3

ARUV₆1₄40LT3

Max. Connectable No. of Indoor Units

Net Weight

lbs

235 x 3 + 315 x 1

518 x 3 + 694 x 1

235 x 2 + 265 x 1 + 315 x 1

518 x 2 + 584 x 1 + 694 x 1

(920 x 1,680 x 760) x 2

235 x 2 + 315 x 2

518 x 2 + 694 x 2

235 x 2 + 315 x 2

518 x 2 + 694 x 2

Dimensions (WxHxD)

(920 x 1,680 x 760) x 3

(920 x 1,680 x 760) x 2

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

inch

(36.2 x 66.1 x 29.9) x 3

(48.8 x 66.1 x 29.9) x 1

22.2(7/8)

(36.2 x 66.1 x 29.9) x 2

(48.8 x 66.1 x 29.9) x 2

22.2(7/8)

(36.2 x 66.1 x 29.9) x 2

(48.8 x 66.1 x 29.9) x 2

22.2(7/8)

(36.2 x 66.1 x 29.9) x 2

(48.8 x 66.1 x 29.9) x 2

22.2(7/8)

Connecting Pipes

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

44.5(1 3/4)

53.98(2)

Unit

4 Outdoor Unit

System(HP)

Model

ARUV700LT3

ARUV200LT3

ARUV160LT3

ARUV₆1₄40LT3

ARUV720LT3

ARUV200LT3

ARUV180LT3

ARUV₆1₄40LT3

ARUV740LT3

ARUV200LT3

ARUV₆1₄40LT3

ARUV760LT3

ARUV200LT3

ARUV₆1₄60LT3

Max. Connectable No. of Indoor Units

Net Weight

lbs

235 x 1 + 265 x 1 + 315 x 2

518 x 1 + 584 x 1 + 694 x 2

(920 x 1,680 x 760) x 1

235 x 1 + 315 x 3

518 x 1 + 694 x 3

235 x 1 + 315 x 3

518 x 1 + 694 x 3

265 x 1 + 315 x 3

584 x 1 + 694 x 3

Dimensions (WxHxD)

(920 x 1,680 x 760) x 1

(920 x 1,680 x 760) x 1 (1,240 x 1,680 x 760) x 4

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

inch

(36.2 x 66.1 x 29.9) x 1

(48.8 x 66.1 x 29.9) x 3

22.2(7/8)

(36.2 x 66.1 x 29.9) x 1

(48.8 x 66.1 x 29.9) x 3

22.2(7/8)

(36.2 x 66.1 x 29.9) x 1

(48.8 x 66.1 x 29.9) x 3

22.2(7/8)

(48.8 x 66.1 x 29.9) x 4

Connecting Pipes

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

22.2(7/8)

53.98(2)

Unit

4 Outdoor Unit

System(HP)

Model

ARUV780LT3

ARUV200LT3

ARUV₆1₄80LT3

ARUV800LT3

ARUV200LT3

ARUV₆2₄00LT3

Max. Connectable No. of Indoor Units

Net Weight

315 x 4

694 x 4

315 x 4

694 x 4

lbs

Dimensions (WxHxD)

Connecting Pipes

(1,240 x 1,680 x 760) x 4

(48.8 x 66.1 x 29.9) x 4

22.2(7/8)

(1,240 x 1,680 x 760) x 4

(48.8 x 66.1 x 29.9) x 4

22.2(7/8)

inch

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

53.98(2)

Outdoor Unit

Environment-friendly Alternative Refrigerant R410A

• 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

• 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.

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 (neare beach, coast, lake, etc).

(Ex) Rooftop where sunshine always shines.

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

installing the outdoor unit in winter at following location:

(1) Shade position with a narrow space

(2) Location with much moisture in neighboring floor.

(3) Location with much humidity around.

(4) Location where water gathers since the floor is not even.

Installation Manual 11

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.

Case 1

Case ₄2_9mm)

Category

Installation Space

(10mm≤Side Space≤49mm)

(Side Space

≥

A≥10

A≥50

B≥300

C≥10

D≥500

B≥100

C≥50

D≥500

Front

A≥10

B≥300

C≥10

D≥500

E≥20

A≥50

B≥100

C≥50

D≥500

E≥100

Front

A≥10

A≥50

4 sides are

walls

B≥300

C≥10

D≥500

E≥20

B≥100

C≥50

Front

D≥500

E≥100

E≥500

F≥600

Front

A≥10

A≥50

B≥300

C≥10

D≥300

E≥20

B≥100

C≥50

Front

D≥100

E≥100

E≥500

F≥500

A≥10

B≥300

No limit to the height of the wall

Front

Only 2 sides

are walls

A≥200

B≥300

E≥400

No limit to the

height of the wall

Front

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

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

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

h₂

Limitations on

the height of

the wall

• If the height of the walls on the front and the side are higher than the limit,

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

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

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

- h1 = A(Actual height) - 1500

h₁

(Refer to 4 side

walls)

- h2 = B(Actual height) - 500

Outdoor Unit

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 50cm 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 10cm, 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.

Installation Manual 13

Lifting Method

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.

Locking points for

transportation ropes

Forklift Carrying Hole

Weight per Capacitance

Chassis

Capacity(HP)

Weight(kg)

155

UX1

155

185

UX2

UX3

235

265

Forklift Carrying Guide

315

CAUTION

Be very careful while carrying the product.

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

• 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 8 m 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.

Outdoor Unit

Installation

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

• The outdoor unit supports at the bottom shall have width of at least 100mm under the unit°Øs legs before being fixed.

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

• Anchor bolts must be inserted at least 75mm.

For outdoor units of 23kW or

above should not be supported

only by the corner supports.

Outdoor units of 14.5, 16kW

can be supported only by the

Needed for outdoor units of 23kW or above

corner supports.

Center of the Unit

Needed for outdoor units of 23kW or above

Center of the Unit

The location of the Anchor bolts

Unit : mm

Chassis

UX1

Capacity(HP)

6~8

A(mm)

620

B(mm)

497

UX2

10~14

920

792

UX3

16~20

1240

1102

Installation Manual 15

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).

At least 200mm

Unit : mm

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

support for the installation may be bent.

- Get and use M10 Anchor bolt.

- Put Cushion Pad between the outdoor unit and ground

support for the vibration protection in wide area.

- Space for pipes and wiring (Pipes and wirings for bot-

tom 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, water outlet treatment(treat-

ment of the water 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 water outlet in the Base pan. Use drainage instead for water outlet. The

tube or pipe may freeze and the water may not be drained.

WARNING

• Be sure to remove the Pallet(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 Pallet(Wood Support) of the bottom

side of the outdoor unit before welding. Not removing

Pallet(Wood Support) causes hazard of fire during welding.

Pallet(Wood Support)

- Remove before Installation

Outdoor Unit

Installation

Preparation of Piping

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

1) Cut the pipes and the cable.

n Use the accessory piping kit or the pipes purchased

Copper

tube

Slanted Uneven Rough

locally.

90°

n Measure the distance between the indoor and the out-

door unit.

n Cut the pipes a little longer than measured distance.

n Cut the cable 1.5m longer than the pipe length.

Pipe

2) Burrs removal

Reamer

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.

Point down

3) Flaring work

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

Handle

Pipe

"ꢀA "

Indoor unit

[kW(Btu/h]

Bar

"A"

Gas

1/2"

5/8"

3/4"

Liquid

Gas

Liquid

0~0.5

Yoke

Cone

<5.6(19,100)

<16.0(54,600)

<22.4(76,400)

1/4"

3/8"

0.5~0.8

0.8~1.0 0.5~0.8

1.0~1.3 0.5~0.8

Copper pipe

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

Clamp handle

dimension in the table above.

Red arrow mark

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.

Smooth all round

Inside is shining without scratches.

= Improper flaring =

Inclined Surface Cracked Uneven

damaged

thickness

Even length

all round

Installation Manual 17

Installation

FLARE SHAPE and FLARE NUT TIGHTENING TORQUE

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.

pipe size

tightening torque(Ncm)

A(mm)

flare shape

90°

Ø9.5

3270-3990

12.8-13.2

Ø12.7

Ø15.9

4950-6030

6180-7540

16.2-16.6

19.3-19.7

R=0.4~0.8

CAUTION

• Always use a charge hose for service port connection.

• After tightening the cap, check that no refrigerant leaks are

present.

Union

• 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.

Opening shutoff valve

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.

Closing shutoff valve

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

Shutoff

Tightening torque N-m(Turn clockwise to close)

valve size

Shaft(valve body)

Cap(Valve lid) Service port

13.5-16.5

Flare nut

14-17

Gas line piping attached to unit

Ø6.4

5.4-6.6

Hexagonal

33-39

50-60

Ø9.5

Ø12.7

wrench 4mm

8.1-9.9

18-22

11.5-13.9

Hexagonal

13.5-16.5

23-27

62-75

Ø15.9

wrench 6mm

Ø22.2

Ø25.4

Hexagonal

27-33

36-44

22-28

wrench 10mm

Outdoor Unit

Installation

HEAT INSULATION

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

120°C).

Fastening band

(accessory)

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

Refrigerant piping

time in high humid atmosphere (dew point tempera-

ture: more than 23°C), water drops are liable to fall. In

this case, add heat insulation material according to the

following procedure:

Indoor unit

Thermal insulator

(accessory)

• Heat insulation material to be prepared... EPDM

(Ethylene Propylene Diene Methylene)-over 120°C

the heat-resistance temperature.

• Add the insulation over 10mm thickness at high humidity environment.

Installation Manual 19

Refrigerant piping installation

Precautions on Pipe connection / Valve operation

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.

Gas pipe

Liquid pipe

Common pipe

• Use hexagonal wrench to open/close the valve.

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

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

connect between the outdoor units using pipes.

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

before connecting. Otherwise, the unit may not operate because

of the sludge inside the pipe.

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

Installing 2 units

Installing 3 units

area leakage test.

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

ing work for more than 1 hour.

5. Open the side pole with hexagonal wrench.

Installing 4 units

❈ When connecting to high low pressure com-

mon pipe, connect pipes using connecting

elbows.

Dig out

Knock Outs

according

the usages.

Dig out Knock Outs according

the usages.

Installing on the front side

Installing on the side(Limited to high

low pressure common pipe)

Outdoor Unit

Refrigerant piping installation

Connection of Outdoor units

2 outdoor units

[Unit : mm]

Outdoor units

Model

Gas pipe

Liquid pipe

416

408

331

314

I.D.15.88

I.D.28.58

I.D.22.2

I.D.12.7 I.D.9.52

I.D.19.05

111

ARCNN21

2 Unit

I.D.31.8 I.D.34.9

I.D.41.3 I.D.38.1 O.D.34.9

I.D.22.2 O.D.19.05

I.D.12.7

I.D.15.88

I.D.28.58

130

341

298

334

281

3 Unit

4 Unit

I.D.41.3

I.D.34.9

111

I.D.22.2 I.D.19.05

I.D.19.05

ARCNN31

ARCNN41

I.D.41.3

O.D.34.9

I.D.15.88 I.D.12.7

I.D.28.58

125

415

375

334

281

I.D.19.05

I.D.22.2 I.D.19.05

I.D.25.4 O.D.22.2

134

I.D.41.3

I.D.44.48 I.D.53.98

I.D.15.88 I.D.12.7

I.D.28.58

For more information, refer accessory installation manual.

Common pipes

I.D.19.05

O.D.19.05

I.D.19.05

O.D.19.05

Field Supply (Not provided by LG)

Facing

Y branch

downwards

upwards

Within +/- 10

Viewed from point A

in direction of arrow

To outdoor unit

To branch piping or indoor unit

Within 3°

Installation Manual 21

Refrigerant piping installation

Caution

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. We recommend the following table as the minimum wall thickness.

Outer diameter

6.35 9.52 12.7 15.88 19.05 22.2 25.4 28.58 31.8 34.9 38.1 41.3 44.45 53.98

[mm]

Minimum

thickness [mm]

0.8

0.99

0.99 0.99 0.99 0.99

1.1 1.21 1.35 1.43 1.55 2.1

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.

Header

Y branch

4 branch

ARBL054

ARBL104

7 branch

ARBL057

ARBL107

10 branch

ARBL1010

ARBL2010

ARBLN01621, ARBLN03321, ARBLN07121,

ARBLN14521, ARBLN23220

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 .)

To Outdoor Unit

Sealed Piping

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

performance.

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

Outdoor Unit

Refrigerant piping installation

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

mance, 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.

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

installation pipe drawing.

Installation Manual 23

Pipe connections between indoor and outdoor unit

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

• Be sure to let 0.2kgf/cm 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.

Regulator

Refrigerant Pipe

Right Side Pipe Draw Out

Nitrogen(

Direction

Taping

Valve

Left Side Pipe Draw Out

Nitrogen

Front Side Pipe Draw Out

Preparation Work

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

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.

Removal Area for common

pipe bottom side connections.

Removal Area for Liquid/Gas pipe

bottom side connections.

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.)

Nut

Washer

1. Open the front panel.

2. Remove Brackets

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

Brackets for Transportation

Outdoor Unit

Pipe connections between indoor and outdoor unit

Service Port

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 ser-

vice port.

Liquid pipe

Gas pipe

3. Remove the leakage prevention cap

Common pipe

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.

Leakage Prevention Cap

5. Weld the pipe cap.

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

inside the valve.

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

abnormality in the cycle caused by refrigerant leakage.

Pipe Cap

Flare Nut

Pipe Drawing Out during Single / Series connection

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.

Common pipe Liquid pipe Gas pipe

Pipe Knock Out for

Liquid/Gas pipes

Pipe Knock Out for

common pipes

Installation Manual 25

Pipe connections between indoor and outdoor unit

n Method of drawing out pipes on the bottom side

①

Drawing out common pipe through side panel

Common pipe

Liquid pipe Gas pipe

Remove only liquid/gas pipe Knock Out

Remove Base Pan

②

Drawing out common pipe through bottom pipe

Common pipe

Liquid pipe Gas pipe

Remove Base Pan

n Figure of Sides when drawing out 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)

Outdoor Unit

Pipe connections between indoor and outdoor unit

Refrigerant piping system

u Y branch method

1 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit

Ⓑ : 1st branch (Y branch)

L150m (200 m : Conditional application)

40m (90 m : Conditional application)

Slave

2 Outdoor Units

Slave

Master

Slave

Master

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit

10m or

less

Ⓑ : 1st branch (Y branch)

ODU Capacity

Master ≥ Slave

Ⓓ : Downward Indoor Unit

Ⓔ : Connection branch pipe

between Outdoor units:

ARCNN21

L150m (200 m : Conditional application)

40m (90 m : Conditional application)

Piping length from outdoor branch to outdoor unit ≤10m, equivalent length:max 13m

(for 22HP or more)

Additional Application

To satisfy below condition to make 40 m ~ 90 m 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

Ø6.35 ’ Ø 9.52 ’ Ø 12.7 ’ Ø 15.88 ’ Ø 19.05 ’ Ø 22.2 ’ Ø 25.4*, Ø 28.58 ’ Ø 31.8*, Ø 34.9 ’ Ø

38.1*

* : It is not necessary to size up.

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

A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 1,000 m

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

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

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

Installation Manual 27

Pipe connections between indoor and outdoor unit

3 Outdoor Units

Slave2

Slave1

Example : 5 Indoor Units

connected

Master

10m or

less

Ⓐ : Outdoor Unit

ODU Capacity

Ⓑ : 1st branch (Y branch)

Master ≥ Slave1 ≥ Slave 2

Ⓓ : Downward Indoor Unit

Ⓔ : Connection branch pipe

between Outdoor units:

ARCNN31

L150m (200 m : Conditional application)

40m (90 m : Conditional application)

Ⓕ : Connection branch pipe

between Outdoor units:

ARCNN21

4 Outdoor Units

Slave3

Slave2

Slave1

Master

Example : 5 Indoor Units

connected

Ⓐ : Outdoor Unit

10m or

less

Ⓑ : 1st branch (Y branch)

ODU Capacity

Master ≥ Slave1 ≥ Slave 2 ≥ Slave 3

Ⓓ : Downward Indoor Unit

L150m (200 m : Conditional application)

Ⓔ : Connection branch pipe

between Outdoor units:

ARCNN41

40m (90 m : Conditional application)

Ⓕ : Connection branch pipe

between Outdoor units:

ARCNN31

Ⓖ : Connection branch pipe

between Outdoor units :

ARCNN21

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

Additional Application

To satisfy below condition to make 40 m ~ 90 m 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

Ø6.35 ’ Ø 9.52 ’ Ø 12.7 ’ Ø 15.88 ’ Ø 19.05 ’ Ø 22.2 ’ Ø 25.4*, Ø 28.58 ’ Ø 31.8*, Ø 34.9 ’ Ø

38.1*

* : It is not necessary to size up.

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

A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 1,000 m

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

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

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

Outdoor Unit

Pipe connections between indoor and outdoor unit

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

Liquid pipe

Gas pipe

Downward Indoor Unit total capacity

[kW(Btu/h)]

[mm(inch)]

≤ 5.6(19,100)

< 16.0(54,600)

Ø6.35(1/4)

Ø9.52(3/8)

Ø12.7(1/2)

Ø15.88(5/8)

Ø19.05(3/4)

Ø22.2(7/8)

Ø12.7(1/2)

Ø15.88(5/8)

Ø19.05(3/4)

Ø22.2(7/8)

≤ 22.4(76,400)

< 33.6(114,700)

< 50.4(172,000)

< 67.2(229,400)

< 72.8(248.500)

< 100.8(344,000)

< 173.6(592,500)

< 184.8(630,700)

< 224.0(764,400)

Ø28.58(1¹/8 )

Ø34.9(1 /8)

Ø41.3(1 /8)

Ø44.5(1 /4)

Ø53.98(2)

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

Longest pipe length

Equivalent pipe length

A+B+C+D+e ≤ 175m(225 m**)

A+B+C+D+e ≤ 150m(200 m**)

Longest pipe length after 1st branch

B+C+D+e ≤ 40m(90 m**)

Difference in height(Outdoor Unit ÷ Indoor Unit)

H ≤ 110m

Difference in height (Indoor Unit ÷ Indoor Unit)

h ≤15m

Difference in height (Outdoor Unit ÷ Outdoor Unit)

h1 ≤ 5m

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

• ** : To apply Conditional Application

Ú Refrigerant pipe diameter from branch to branch(A,E,F,G)

Upward Outdoor Unit

Liquid pipe

Gas pipe

total capacity [kW(Btu/h)]

[mm(inch)]

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

28.0(95,900)

33.6(114,700)~44.8(152,900)

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

67.2(229,400)

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

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

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

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

Ø19.05(3/4)

Ø22.2(7/8)

Ø9.52(3/8)

Ø12.7(1/2)

Ø15.88(5/8)

Ø28.58(1 1/8 )

Ø34.9(1 3/8)

Ø19.05(3/4)

Ø22.2(7/8)

Ø41.3(1 5/8)

Ø44.5(1 3/4)

Ø53.98(2)

Installation Manual 29

Pipe connections between indoor and outdoor unit

u Header Method

1 Outdoor Unit

Example : 6 Indoor Units connected

Ⓐ : Outdoor Unit

Ⓑ : 1st branch

Ⓓ : Sealed piping

L 200m

40m

2 Outdoor Units

Slave

Master

Example : 6 Indoor Units connected

Ⓐ : Outdoor Unit

10m or

less

Ⓑ : Header branch

ODU Capacity

Master ≥ Slave

Ⓓ : Sealing

Ⓔ : Connection branch pipe

between Outdoor units:

ARCNN21

L 200m

40m

Outdoor Unit

Pipe connections between indoor and outdoor unit

3 Outdoor Units

Slave2

Slave1

Master

Example : 6 Indoor Units connected

Ⓐ : Outdoor Unit

Ⓑ : Header branch

Ⓓ : Sealing

Ⓔ : Connection branch pipe

between Outdoor units:

ARCNN31

ODU Capacity

Master ≥ Slave1 ≥ Slave2

10m or

less

L 200m

40m

Ⓕ : Connection branch pipe

between Outdoor units:

ARCNN21

Branch pipe can not be used after header

Slave3

Slave2

Slave1

Master

4 Outdoor Units

Example : 6 Indoor Units connected

ODU Capacity

Ⓐ : Outdoor Unit

Ⓑ : Header branch

Ⓓ : Sealing

Master ≥ Slave1 ≥ Slave2 ≥ Slave3

10m or

less

L 200m

Ⓔ : Connection branch pipe

between Outdoor units:

ARCNN41

40m

Ⓕ : Connection branch pipe

between Outdoor units:

ARCNN31

Ⓖ : Connection branch pipe

between Outdoor units :

ARCNN21

Branch pipe can not be used after header

Ú Total pipe length = A+a+b+c+d+e+f ≤ 1,000m

Longest pipe length

A+f ≤ 200m

* Equivalent pipe length

A+f ≤ 225m

WARNING

Longest pipe length after 1st branch

Pipe length after header branching

(a~f)

f ≤ 40m

Difference in height(Outdoor Unit ÷ Indoor Unit)

It is recommended that difference in

length of the pipes connected to the

Indoor Units is minimized.

Performance difference between

Indoor Units may occur.

H ≤ 110m

Difference in height (Indoor Unit ÷ Indoor Unit)

h ≤15m

Difference in height (Outdoor Unit

h1 ≤ 5m

Outdoor Unit)

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

• Indoor Unit should be installed at lower position than the header.

• Piping length from outdoor branch to outdoor unit ≤ 10m, equivalent length : max 13m

(for 22HP or more)

Installation Manual 31

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 150m(200m : Conditional application)

40m(90m : Conditional application)

Branch pipe can not be used after header

2 Outdoor Units

Slave

Example : 5 Indoor Units connected

Master

Ⓐ : Outdoor Unit

Ⓑ : 1st branch

ODU Capacity

Master ≥ Slave

10m or

less

Ⓓ : Indoor Unit

Ⓔ : Connection branch pipe

between Outdoor units:

ARCNN21

Ⓕ : Header

L 150m(200m : Conditional application)

40m(90m : Conditional application)

Ⓖ : Sealed piping

Branch pipe can not be used after header

Outdoor Unit

Pipe connections between indoor and outdoor unit

3 Outdoor Units

Slave2

Slave1

Master

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit

Ⓑ : 1st branch(Y branch)

ODU Capacity

Master ≥ Slave1 ≥ Slave2

10m or

less

Ⓓ : Indoor Unit

Ⓔ : Connection branch pipe

between Outdoor units:

ARCNN31

Ⓕ : Connection branch pipe

between Outdoor units:

ARCNN21

L 150m(200m : Conditional application)

40m(90m : Conditional application)

Ⓖ : Header

Ⓗ : Sealing

Branch pipe can not be used after header

4 Outdoor Units

Slave3

Slave2

Slave1

Example : 5 Indoor Units connected

Master

ODU Capacity

Ⓐ : Outdoor Unit

Master ≥ Slave1 ≥ Slave2 ≥ Slave3

Ⓑ : 1st branch(Y branch)

10m or

less

Ⓓ : Indoor Unit

Ⓔ : Connection branch pipe

between Outdoor units:

ARCNN41

Ⓕ : Connection branch pipe

between Outdoor units:

ARCNN31

L 150m(200m : Conditional application)

40m(90m : Conditional application)

Ⓖ : Connection branch pipe

between Outdoor units:

ARCNN21

Ⓗ : Header

Ⓘ : Sealing

Branch pipe can not be used after header

Installation Manual 33

Pipe connections between indoor and outdoor unit

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

Liquid pipe

[mm(inch)]

Ø6.35(1/4)

Gas pipe

[mm(inch)]

Ø12.7(1/2)

Downward Indoor Unit total capacity

[kW(Btu/h)]

≤ 5.6(19,100)

< 16.0(54,600)

≤ 22.4(76,400)

Ø9.52(3/8)

Ø12.7(1/2)

Ø15.88(5/8)

Ø19.05(3/4)

Ø22.2(7/8)

Ø15.88(5/8)

Ø19.05(3/4)

Ø22.2(7/8)

Ø28.58(11/8 )

Ø34.9(13/8)

Ø41.3(15/8)

Ø44.5(13/4)

Ø53.98(2)

< 33.6(114,700)

< 50.4(172,000)

< 67.2(229,400)

< 72.8(248,500)

< 100.8(344,000)

< 173.6(592,500)

< 184.8(630,700)

< 224.0(764,400)

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

Longest pipe length

* Equivalent pipe length

A+B+b ≤ 175m(225m**)

A+B+b ≤ 150m(200m**)

Longest pipe length after 1st branch

B+b ≤ 40m(90m**)

Difference in height(Outdoor Unit ÷ Indoor Unit)

H ≤ 110m

Difference in height (Indoor Unit ÷ Indoor Unit)

h ≤ 15m

Difference in height (Outdoor Unit ÷ Outdoor Unit)

h1 ≤ 5m

• *

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

• Indoor Unit should be installed at lower position than the header.

WARNING

It is recommended that difference of piping length for pipes connected to the Indoor Unit is

minimized. Performance difference between Indoor Units may occur.

Ú Refrigerant pipe diameter from branch to branch(A,E,F,G)

Upward Outdoor Unit

Liquid pipe

Gas pipe

total capacity [kW(Btu/h)]

[mm(inch)]

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

28.0(95,900)

33.6(114,700)~44.8(152,900)

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

67.2(229,400)

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

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

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

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

Ø19.05(3/4)

Ø22.2(7/8)

Ø9.52(3/8)

Ø12.7(1/2)

Ø15.88(5/8)

Ø28.58(1 1/8 )

Ø34.9(1 3/8)

Ø19.05(3/4)

Ø22.2(7/8)

Ø41.3(1 5/8)

Ø44.5(1 3/4)

Ø53.98(2)

Outdoor Unit

Pipe connections between indoor and outdoor unit

u Outdoor unit Connection

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(gas pipe), Ø15.88(liquid pipe)

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

Ø19.05(liquid pipe)

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

which is same with main pipe diameter.

[Example]

Do not choose the main pipe diameter by downward indoor unit total capacity but its outdoor unit model name.

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 (61.5 kW) outdoor unit to 120% of its system capacity (73.8

kW) and branching 7k (2.1kW) indoor unit at the 1st branch

Main pipe diameter(22 HP outdoor unit): Ø28.58(Gas pipe) Ø15.88(Liquid pipe)

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

Ø34.9(Gas pipe) Ø19.05(Liquid pipe) in conformity with downward indoor units.

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

pipe) and Ø15.88 (Liquid pipe) is used as the main pipe and the connection pipe between 1st and 2nd branch.

* High/Low Pressure Common Pipe: Ø19.05(22HP or more)

u Indoor Unit Connection

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

Liquid pipe

[mm(inch)]

Ø6.35(1/4)

Ø9.52(3/8)

Gas pipe

Indoor Unit capacity [kW(Btu/h)]

[mm(inch)]

≤ 5.6(19,100)

< 16.0(54,600)

< 22.4(76,400)

Ø12.7(1/2)

Ø15.88(5/8)

Ø19.05(3/4)

Installation Manual 35

Pipe connections between indoor and outdoor unit

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.

n Pipe connection between outdoor units

(General Case)

The maximum pipe length

after the first branching

between the outdoor units is

10m or less

n Pipes between outdoor units are

2m or less

n Pipes between outdoor units are

2m or longer

Oil Trap

0.2m or more

2m or less

2m or longer

Oil Trap

2m or less

2m or longer

2m or less

2m or longer

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

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

n Examples of Wrong Pipe Connections

If the main pipe is higher

than the outdoor units, oil

is accumulated in the

Oil Trap

outdoor unit.

If there are differences in the height

between the outdoor units, oil is

accumulated in the lower outdoor unit.

Outdoor Unit

Pipe connections between indoor and outdoor unit

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

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

(Example 1)

Toward indoor unit

(Example 2)

Toward indoor unit

Pipe inclination (2° or more)

Toward indoor unit

(Example 3)

Toward indoor unit

• Apply Oil Trap as shown below when the length of the pipe between the outdoor units is more than 2m.

Otherwise, the unit may not operate properly.

(Example 1)

≤ 2m

Toward indoor unit

(Example 2)

Oil Trap

≤ 2m

Toward indoor unit

≥ 2m

Installation Manual 37

Pipe connections between indoor and outdoor unit

• 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.

(Example 1)

Toward indoor unit

(Example 2)

Toward indoor unit

(Example 3)

Oil Trap

Toward indoor unit

• h : Height of between outdoor units

Outdoor Unit

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.

Amount refrigerant of Indoor units

Total liquid pipe

:Ø25.4 mm

Additional charge(kg)

Example) 4Way Ceiling Cassette 14.5kW -1ea

Ceiling concealed Duct 7.3kW-2ea

Wall Mounted 2.3kW-4ea

Total liquid pipe

:Ø22.2 mm

CF = 0.64 × 1 + 0.26 × 2 + 0.24 × 4 = 2.12 kg

Total liquid pipe

:Ø19.05 mm

Total liquid pipe

:Ø15.88 mm

Total liquid pipe

:Ø12.7 mm

Total liquid pipe

:Ø9.52 mm

Total liquid pipe

:Ø6.35 mm

CF value of indoor unit

(unit : kg)

Capacity(Btu/h(kW)) 5k

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

Type

(1.6) (2.2) (2.8) (3.6) (4.5) (5.6) (7.1) (8.2) (10.6) (12.3) (14.1) (22.4) (28.0)

Ceiling Concealed Duct (Low Static)

Ceiling Concealed Duct (High Static)

Wall Mounted

0.17 0.17 0.17 0.17 0.37 0.37

0.26 0.26 0.26 0.26 0.26 0.26 0.44 0.44 0.44 0.62 1.00 1.00

0.24 0.24 0.24 0.24 0.28 0.28

1Way Ceiling Cassette

2Way Ceiling Cassette

4Way Ceiling Cassette

ARTCOOL Gallery

Floor Standing

0.20 0.20 0.20

0.29 0.29

0.16 0.16

0.18 0.18 0.25 0.25 0.32 0.32 0.48 0.48 0.64 0.64 0.64

0.10 0.10 0.10

0.17 0.17 0.17 0.17 0.37 0.37

Ceiling & Floor

0.10 0.10

0.75

Ceiling Suspended

Console

0.35 0.35

0.54

0.17 0.17 0.17 0.17

Fresh Air Intake Unit

Heat recovery ventilator(DX)

0.62 1.00 1.00

0.20

0.20 0.20

CAUTION

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

Installation Manual 39

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.

Total amount of refrigerant in the system

≤ 0.44 ( kg / m )

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

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 2m 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

Refrigerant Bottling

Liquid pipe

Gas pipe

Ⓐ Manifold Gauge

Ⓑ Low pressure side Handle

Common pipe

- 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.

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.

Outdoor Unit

Pipe connections between indoor and outdoor unit

Distribution Method

1. Line Distribution

Slave

Master

2nd

Slave

3rd main pipe distribution

Master

1st

Slave

Master

2nd

1st

3rd

1st

3rd

1st

Main pipe

Distribution

2nd

Main pipe

Distribution

2. Vertical Distribution

Ensure that the branch pipes are attached vertically.

Slave

Master

Slave

Master

3. The others

Slave

Master

Slave

Master

Header

Installation Manual 41

Pipe connections between indoor and outdoor unit

Branch pipe Fitting

Y branch

To Outdoor Unit

To Branch Piping or Indoor Unit

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

Horizontal

plane

Facing

downwards

Facing

upwards

Within +/- 10°

Viewed from point A

in direction of arrow

Within 3°

• 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.

Tape

(field supply)

Liquid and gas

pipe joints

Insulator for

field piping

Insulator

(included with kit)

A To outdoor unit

Header

To indoor unit

• 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.

• When the number of pipes to be connected is

smaller than the number of header branches,

install a cap to the unconnected branches.

Outdoor Unit

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.

Pinched pipe

• Fit branch pipe lie in a horizontal plane.

Horizontal plane

View from point B in the direction of the arrow

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

Insulate the header using

the insulation

material attached to the

branch pipe kit

as shown in the figure.

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

Tape

Insulator

Insulator of field pipe

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

above.

Insulator for cap pipe

Cap pipe

Tape

Installation Manual 43

Pipe connections between indoor and outdoor unit

u Y branch pipe

[unit:mm]

Models

Gas pipe

Liquid pipe

I.D.6.35 I.D9.52

I.D12.7

I.D15.88

I.D12.7

I.D6.35

I.D15.88

I.D9.52

I.D.6.35

I.D15.88

I.D12.7

I.D.9.52

ARBLN01621

281

292

281

292

O.D9.52

I.D19.05

O.D15.88

I.D12.7

I.D22.2

I.D19.05

I.D15.88

I.D19.05 I.D12.7

I.D12.7

I.D9.52

I.D6.35

I.D19.05

I.D12.7

I.D25.4

I.D15.88

I.D12.7

I.D6.35

390

413

I.D12.7

I.D9.52

ARBLN03321

ARBLN07121

I.D22.2

I.D28.58

I.D22.2

O.D19.05

321

332

O.D19.05

O.D25.4

I.D25.4

110

I.D19.05

I.D12.7

I.D15.88

I.D12.7

I.D28.58

I.D31.8

I.D22.2

I.D15.88

I.D12.7

I.D15.88

I.D15.88 I.D19.05

I.D19.05

I.D12.7

376

404

371

394

I.D28.58 I.D31.8

120

I.D34.9

O.D31.8

I.D22.2

O.D19.05

O.D12.7

I.D9.52 I.D6.35

O.D12.7 I.D9.52

I.D28.58

O.D22.2

120

110

I.D34.9

I.D38.1

I.D28.58

I.D19.05

I.D41.3

I.D38.1

I.D15.88 I.D19.05

I.D22.2

I.D15.88

I.D34.9

I.D28.58

I.D15.88

I.D19.05

125

I.D22.2

I.D12.7

I.D34.9

I.D22.2

471

517

416

444

ARBLN14521

ARBLN23220

I.D15.88

I.D41.3

I.D38.1

I.D19.05

O.D38.1

O.D34.9

I.D41.3

I.D12.7

O.D19.05

I.D9.52

110

O.D22.2

O.D15.88

I.D9.52

I.D22.2

O.D12.7

I.D6.35

120

130

I.D22.2

I.D12.7

O.D28.58

I.D19.05

O.D15.88

110

I.D.44.48

I.D41.3

I.D.25.4

I.D.53.98

I.D38.1

I.D25.4

I.D22.2

I.D.22.2

I.D.19.05

I.D.44.48

I.D38.1

I.D.44.48

134

I.D41.3

I.D.25.4

I.D.22.2

I.D.19.05

420

490

346

379

I.D.34.9 I.D31.8

I.D.28.58

I.D.53.98

I.D.25.4

O.D.44.48

I.D.22.2

O.D.38.1

O.D.28.58

I.D.15.88

110

I.D9.52

110

O.D.19.05

I.D.12.7

O.D12.7

I.D6.35

175

115

I.D.15.88

100

I.D12.7

I.D.19.05

O.D15.88

O.D.22.2

120

Outdoor Unit

Pipe connections between indoor and outdoor unit

u Header

[unit:mm]

Models

Gas pipe

Liquid pipe

360

120

ID12.7

ID6.35

ID12.7

4 branch

ARBL054

ID9.52

150

ID15.88

150

ID9.52

120

ID15.88

ID12.7

ID9.52

ID15.88

ID19.05

540

120

ID12.7

ID6.35

ID12.7

7 branch

ARBL057

ID9.52

ID15.88

150

120

ID15.88

120

ID9.52

ID15.88

ID12.7

ID19.05

400

360

ID6.35

160

120

ID15.88

ID6.35

ID9.52

ID12.7

4 branch

ARBL104

ID9.52

ID19.05

150

120

ID15.88

ID22.2

ID9.52

ID12.7

ID28.58 ID25.4

700

580

160

120

ID15.88

ID6.35

ID9.52

ID12.7

7 branch

ARBL107

150

ID9.52

ID19.05

120

ID15.88

ID12.7

ID9.52

ID28.58 ID25.4

ID22.2

760

720

160

120

ID15.88

ID6.35

10 branch

ARBL1010

ID12.7

ID6.35

ID9.52

150

ID19.05

120

ID15.88

120

ID9.52

ID12.7

107

ID9.52

ID28.58

ID25.4

ID22.2

700

60*9=540

775

182

ID15.88

ID6.35

ID12.7

ID15.88

10 branch

ARBL2010

ID6.35

ID9.52

150

ID19.05

150

120

ID15.88

ID19.05

ID9.52

ID31.8 ID34.9

ID28.58

Installation Manual 45

Pipe connections between indoor and outdoor unit

Leak Test and Vacuum drying

(1) Leak test

Leak test should be made by pressurizing nitrogen gas to 3.8 MPa(38.7kgf/cm ). 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 com-

pletion of nitrogen gas pressurization.

Slave 1 outdoor unit

Master outdoor unit

Nitrogen gas

cylinder

Liquid side

Gas side

Nitrogen gas

cylinder

Indoor unit

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 0.1 kg/cm (0.01 MPa) 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 (3.8 MPa) is 27 °C

24 hour later: 3.73 MPa, 20°C

In this case the pressure drop of 0.07 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.

Outdoor Unit

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 (5 Torr, -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.

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(vacuum break) with nitro-

gen gas and then evacuate it again with the vacuum pump for 1hr to -100.7kPa(vacuum drying). If the

system cannot be evacuated to -100.7kPa 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.

Slave 1 outdoor unit

Master outdoor unit

Vacuum

pump

Vacuum

pump

Liquid side

Gas side

Indoor unit

Scale

Use a graviometer. (One that can measure

down to 0.1kg). If you are unable to prepare

such a high-precision gravimeter you may

use a charge cylinder.

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.)

WARNING

When installing and 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.

Installation Manual 47

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.

Vacuum mode setting method

ODU power reset

Vacuum mode cancellation method

Main PCB

SW01S

Master main PCB DIP switch OFF( No.11,14)

Main PCB

SW02B

Power reset

Master main PCB DIP switch ON ( No.11,14)

Press the black button Main PCB (5 sec.)

Vacuum mode cancellation

Main PCB

SW01V

Vacuum mode setting

ODU V/V OPEN

Main EEV, SC EEV OPEN

IDU EEV OPEN

Caution

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

Outdoor Unit

Pipe connections between indoor and outdoor unit

Thermal insulation of refrigerant piping

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

Heat

Adhesive + Heat - resistant polyethylene foam +

Adhesive tape

insulation

material

Indoor

Floor exposed Water-proof hemp cloth + Bronze asphalt

Outdoor Water-proof hemp cloth + Zinc plate + Oily paint

Vinyl tape

Outer

covering

Heat insulation material

Pipe

Note:

When using polyethylene cover as covering material, asphalt roof-

ing shall not be required.

Outer covering

(Wind the connection part and cutting part of

heat insulation material with a finishing tape.)

• 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

Bad example

Power lines

Finishing tape

Insulating material

Transmission lines

These parts are not insulated.

Power lines

Transmission lines

Good example

Liquid pipe

Gas pipe

Separation

Power lines

Insulating material

Transmission lines

Penetrations

Sleeve

Heat insulating material

Lagging

Outer wall

Outer wall (exposed)

Inner wall (concealed)

Caulking material

Band

Waterproofing layer

Sleeve with edge

Penetrating portion on fire

limit and boundary wall

Lagging material

Mortar or other incombustible caulking

Incombustible heat insulation material

Floor (fireproofing)

Roof pipe shaft

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.)

Outdoor Unit

Installation Manual 49

Electrical Wiring

Caution

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

wiring regulations and guidance of each electric power company.

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.

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

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

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

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

times 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.

Outdoor Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Remote

control

Remote

control

Remote

control

Remote

control

Outdoor Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Remote

control

Remote

control

Remote

control

Remote

control

2-Core Shield Cable

Multi-Core Cable

Outdoor Unit

Electrical Wiring

Outdoor Unit

Master Slave1

Slave2

Master Slave1 Slave2

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Remote

controller

Remote

controller

Remote

controller

Outdoor Unit

Master Slave1

Slave2

Master Slave1

Slave2

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Remote

controller

Remote

controller

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.

u Precautions when laying power wiring

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

Power wire

Round pressure terminal

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.)

• When connecting wiring which is the same thickness, do as shown in the figure below.

• 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.

CAUTION

When the 400 volt power supply is applied to “N” phase by mistake, replace inverter PCB and transformer in

control box.

Installation Manual 51

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 dedicat-

ed 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.

Front Panel

WARNING

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

- Provide an appropriate cover to intercept direct sunlight.

UX3

Main PCB

Inverter fan PCB

Noise filter

Reactor

Bridge diode

Magnet switch

Inverter PCB

Take care of the phase

sequence of 3-phase 4-wire

power system

UX2

UX1

Main PCB

Inverter fan PCB

Noise filter

Reactor

Noise filter

Reactor

Bridge diode

Magnet switch

Inverter PCB

Take care of the phase

sequence of 3-phase 4-wire

power system

Take care of the phase

sequence of 3-phase 4-wire

power system

Outdoor Unit

Electrical Wiring

Transmission and Power Lines

1) Transmission cable

• Types : shielding wire

• Diameter : 10.~1.5mm

• Maximum allowable temperature: 60°C

• Maximum allowable line length: under 300m

2) Remote control cable

• Types : 3-core cable

3) Central control cable

Product type

Wire type

Diameter

ACP&AC Manager(256 IDU) 4-core cable(Shielding wire)

AC Smart II

Simple central controller

10.~1.5mm

4-core cable(Shielding wire)

4) Separation of transmission and power lines

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

faults developing due to interference in the signal wiring caused by electrostatic and electromagnetic cou-

pling.

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

where these are to be run side by side

Current capacity of power line

Spacing

300mm

500mm

1000mm

1500mm

10A

50A

100A

100V or more

Exceed 100A

Note:

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

the figures will have to be recalculated in direct proportion to the additional length of line involved.

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.

CAUTION

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

apparatus must be carried out by a qualified person.

Installation Manual 53

Electrical Wiring

u Wiring of Main Power Supply and Equipment Capacity

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

capacity may cause a malfunction of unit or fire.

Outdoor Unit

Electrical Wiring

Field Wiring

1. 50Hz

u Example Connection of Communication Cable

n 1 Outdoor Unit-3Ø, 380-415V

3 Phase 4 Wires

Power supply

50Hz 380-415V

[Outdoor Unit]

(Main Switch)

Switch

Fuse

Power supply

1 Phase 50Hz

220-240V

Power Line

(4 Wires Cable)

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

Pull Box

(Installer option)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

[Indoor Units]

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.

Between Indoor and Master Outdoor unit

SODU

IDU INTERNET DRY1 DRY2 GND 12V

Master

Outdoor Unit

The GND terminal is a '–' terminal for Dry Contact not Ground Line

Installation Manual 55

Electrical Wiring

n 2 Outdoor Units-3Ø, 380-415V

■ When the power source is connected

In series between the units.

3 Phase 4 Wires

Power supply

50Hz 380-415V

(Main Switch)

[Master]

[Slave]

Switch

Fuse

Power supply

1 Phase 50Hz

220-240V

Power Line

(4 Wires Cable)

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

Pull Box

(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

[Indoor Units]

■ When the power source is supplied to

Each outdoor unit individually.

3 Phase 4 Wires

Power supply

50Hz 380-415V

(Main Switch)

[Master]

[Slave]

Switch

Fuse

Power supply

1 Phase 50Hz

220-240V

Power Line

(4 Wires Cable)

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

Pull Box

(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

[Indoor Units]

Outdoor Unit

Electrical Wiring

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.

Between Indoor and Master Outdoor unit

SODU

IDU INTERNET DRY1 DRY2 GND 12V

SODU

IDU INTERNET DRY1 DRY2 GND 12V

Master

Outdoor unit

SODU

IDU INTERNET DRY1 DRY2 GND 12V

Slave

Outdoor Unit

The GND terminal is a '–' terminal for the central controller, not Ground Line

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

Installation Manual 57

Electrical Wiring

n 3 Outdoor Units-3Ø, 380-415V

■ When the power source is connected

In series between the units.

3 Phase 4 Wires

Power supply

50Hz 380-415V

(Main Switch)

[Master]

[Slave1]

[Slave2]

Switch

Fuse

Power supply

1 Phase 50Hz

220-240V

Power Line

(4 Wires Cable)

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

Pull Box

(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

[Indoor Units]

■ When the power source is supplied to

Each outdoor unit individually.

3 Phase 4 Wires

Power supply

50Hz 380-415V

(Main Switch)

[Master]

[Slave1]

[Slave2]

Switch

Fuse

Power supply

1 Phase 50Hz

220-240V

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

Power Line

(4 Wires Cable)

Pull Box

(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

[Indoor Units]

Outdoor Unit

Electrical Wiring

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.

Between Indoor and Master Outdoor unit

SODU

IDU INTERNET DRY1 DRY2 GND 12V

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

The GND terminal is a '–' terminal for the central controller, not Ground Line

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

Outdoor Unit

Installation Manual 59

Electrical Wiring

n 4 Outdoor Units - 3Ø, 380-415V

n When the power source is connected

In series between the units.

3 Phase 4 Wires

Power supply

50Hz 380-415V

(Main Switch)

[Master]

[Slave1]

[Slave2]

[Slave3]

Switch

Fuse

Power supply

1 Phase 50Hz

220-240V

Power Line

(4 Wires Cable)

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

Pull Box

(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

[Indoor Units]

n When the power source is supplied to

Each outdoor unit individually.

3 Phase 4 Wires

Power supply

50Hz 380-415V

(Main Switch)

[Master]

[Slave1]

[Slave2]

[Slave3]

Switch

Fuse

Power supply

1 Phase 50Hz

220-240V

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

Power Line

(4 Wires Cable)

Pull Box

(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

[Indoor Units]

Outdoor Unit

Electrical Wiring

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.

Between Indoor and Master Outdoor unit

SODU

IDU INTERNET DRY1 DRY2 GND 12V

Master

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

The GND terminal is a '–' terminal for the

central controller, not Ground Line

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

Installation Manual 61

Electrical Wiring

2. 60Hz

u Example Connection of Communication Cable

n 1 Outdoor Unit - 3Ø, 380V

3 Phase 4 Wires

Power supply

60Hz 380V

[Outdoor Unit]

(Main Switch)

Switch

Fuse

Power supply

1 Phase 60Hz

220V

Power Line

(4 Wires Cable)

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

Pull Box

(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

[Indoor Units]

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.

Between Indoor and Master Outdoor unit

SODU

IDU INTERNET DRY1 DRY2 GND 12V

Master

Outdoor Unit

The GND terminal is a '–' terminal for Dry Contact not Ground Line

Outdoor Unit

Electrical Wiring

n 2 Outdoor Units - 3Ø, 380V

n When the power source is connected

In series between the units.

3 Phase 4 Wires

Power supply

60Hz 380V

(Main Switch)

[Master]

[Slave]

Switch

Fuse

Power supply

1 Phase 60Hz

220V

Power Line

(4 Wires Cable)

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

Pull Box

(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

[Indoor Units]

n When the power source is supplied to

Each outdoor unit individually.

3 Phase 4 Wires

Power supply

60Hz 380V

(Main Switch)

[Master]

[Slave]

Switch

Fuse

Power supply

1 Phase 60Hz

220V

Power Line

(4 Wires Cable)

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

Pull Box

(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

[Indoor Units]

Installation Manual 63

Electrical Wiring

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.

Between Indoor and Master Outdoor unit

SODU

IDU INTERNET DRY1 DRY2 GND 12V

Master

SODU

IDU INTERNET DRY1 DRY2 GND 12V

Master

Outdoor Unit

SODU

IDU INTERNET DRY1 DRY2 GND 12V

Slave

Outdoor Unit

The GND terminal is a '–' terminal for the central controller, not Ground Line

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

Outdoor Unit

Electrical Wiring

n 3 Outdoor Units - 3Ø, 380V

n When the power source is connected

In series between the units.

3 Phase 4 Wires

Power supply

60Hz 380V

(Main Switch)

[Master]

[Slave1]

[Slave2]

Switch

Fuse

Power supply

1 Phase 60Hz

220V

Power Line

(4 Wires Cable)

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

Pull Box

(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

[Indoor Units]

n When the power source is supplied to

Each outdoor unit individually.

3 Phase 4 Wires

Power supply

60Hz 380V

(Main Switch)

[Master]

[Slave1]

[Slave2]

Switch

Fuse

Power supply

1 Phase 60Hz

220V

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

Power Line

(4 Wires Cable)

Pull Box

(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

[Indoor Units]

Installation Manual 65

Electrical Wiring

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.

Between Indoor and Master Outdoor unit

SODU

IDU INTERNET DRY1 DRY2 GND 12V

Master

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

The GND terminal is a '–' terminal for the central controller, not Ground Line

• Make sure that terminal number of master and slave outdoor units are matched.

(A-A,B-B)

Slave2

Outdoor Unit

Electrical Wiring

n 4 Outdoor Units - 3Ø, 380V

n When the power source is connected

In series between the units.

3 Phase 4 Wires

Power supply

60Hz 380V

(Main Switch)

[Master]

[Slave1]

[Slave2]

[Slave3]

Switch

Fuse

Power supply

1 Phase 60Hz

220V

Power Line

(4 Wires Cable)

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

Pull Box

(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

[Indoor Units]

n When the power source is supplied to

Each outdoor unit individually.

3 Phase 4 Wires

Power supply

60Hz 380V

(Main Switch)

[Master]

[Slave1]

[Slave2]

[Slave3]

Switch

Fuse

Power supply

1 Phase 60Hz

220V

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

Power Line

(4 Wires Cable)

Pull Box

(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

[Indoor Units]

Installation Manual 67

Electrical Wiring

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 equip-

ment 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.

Between Indoor and Master Outdoor unit

SODU

IDU INTERNET DRY1 DRY2 GND 12V

Master

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

The GND terminal is a '–' terminal for the

central controller, not Ground Line

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

u Example Connection of Communication Cable

[BUS type]

[STAR type]

• Connection of communication cable must be

installed like below figure between indoor unit to

outdoor unit.

• Abnormal operation can be caused by communi-

cation defect, when connection of communication

cable is installed like below figure(STAR type).

Outdoor Unit

Electrical Wiring

u UX1 Chassis Wire Connection

Left Side

Right Side

Main Powerr Terminal Block

Power/Ground lines

Ground Cable

Over 50mm Gap

Communication line

Front Side 2

Front Side 1

Main Powerr Terminal Block

Ground Cable

Power/Ground lines

Over

50mm Gap

Power/Ground lines

Communication line

Over 50mm Gap

Main Power Connection

Main PCB Connection

Main Powerr Terminal Block

Insulation sleeves attachments

Ground Cable

ODU-ODU

Communication line

ODU-IDU

Communication

line

Fix firmly not

to be displaced

Installation Manual 69

Electrical Wiring

u UX2 Chassis Wire Connection

Left Side

Right Side

Main Power

Terminal Block

Power/Ground lines

Ground Cable

Over 50mm Gap

Communication line

Front Side 1

Front Side 2

Main Power

Terminal Block

Ground Cable

Power/Ground lines

Over

50mm Gap

Power/Ground lines

Communication line

Over 50mm Gap

Main Power Connection

Main PCB Connection

ininPo

Terminal Block

Insulation sleeves attachments

Ground Cable

ODU-IDU

Communication line

ODU-ODU

Communicattion line

Fix firmly not to be displaced

Outdoor Unit

Electrical Wiring

u UX3 Chassis Wire Connection

Right Side

Left Side

Main Power

႖^Maဴⁱⁿꢀ^Pఎ^owၴ^erఝ

Terminal Block

Power/Ground lines

Ground Cable

Over 50mm Gap

Communication line

Front Side 1

Front Side 2

Main Power

Terminal Block

Ground Cable

Power/Ground lines

Over

50mm Gap

Power/Ground lines

Communication line

Over 50mm Gap

Main Power Connection

Main PCB Connection

;

Main Power Terminal Block

Insulation sleeves attachments

Ground Cable

ODU-IDU

ODU-ODU

Communication

line

Communicaationn line

Fix firmly not

to be displaced

Installation Manual 71

Electrical Wiring

Location of setting Switch

Main PCB

SW01B

SW02B

7 - Segment

SW02V

(Auto Addressing)

Outdoor Unit

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 30HP)

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

1 ~255 : Master model code

1 ~255 : Slave1 model code

Refer to table code

1 ~255 : Slave2 model code

}

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

No display : cooling only

25 : normal

2 : heat pump

150 : Model Type

Example) 30Hp, R410A

16 ’ 15 ’ 30 ’ 2 ’ 25 ’ 150

CAUTION

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

Model Code

Unit (HP)

Unit

Ref.

Master &

Slave

R410A

Installation Manual 73

Electrical Wiring

n Setting the DIP switch

• 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

10 11 12 13 14

●

ⅹ

●

ⅹ

●

ⅹ

●

ⅹ

Auto charging

Refrigerant Checking Function

Indoor EEV malfunction (Cooling)

Indoor EEV malfunction (Heating)

Integrated test operation function (Cooling)

Inverter backup

●

Unit backup

ⅹ

●

ⅹ

●

ⅹ

●

ⅹ

Non-operation indoor unit EEV adjustment

Indoor unit target subcooling/overheating adjustment

Dry contact

Snow removal function

Static pressure mode

Night low noise operation (Cooling only)

Night low noise operation (Cooling/Heating)

Pump down

●

ⅹ

●

ⅹ

●

ⅹ

●

ⅹ

●

ⅹ

●

Pump out

●

Forced oil return operation

Vacuum mode

●

ⅹ

●

ⅹ

●

ⅹ

●

ⅹ

●

Master unit

Slave 1 unit

Slave 2 unit

Slave 3 unit

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.

Outdoor Unit

Electrical Wiring

Automatic Addressing

• The address of indoor units would be set by auto

addressing

SW01B

SW02B

7 - Segment

1) Wait for 3 minutes after applying power supply

(master and sub outdoor unit, indoor unit).

2) Press the switch of the outdoor unit (SW02V) for 5

seconds.

SW02V

(Auto Addressing)

3) A "88" is indicated on 7-segment LED of the out-

door unit PCB.

4) For completing addressing, 2~7 minutes are

required depending on numbers of indoor unit con-

nection set.

5) Numbers of indoor unit connection set whose

addressing is completed are indicated for 30sec-

onds 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. (CH01, CH02, CH03, .............

CH06: Indicated as numbers of indoor unit connec-

tion set.)

CAUTION

- In replacement of the indoor unit PCB, always perform auto address setting again.

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

Auto addressing is only possible on the main PCB

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

u The Procedure of Automatic Addressing

Power On

Waiting 3 minutes

Press SW02V for 5 sec.

Auto addressing start

7-segment LED

= 88

Don't Press SW02V

• 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

Waiting about 2~7 minutes

Check the connections

of transmission line

7-segment LED

= 88

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.

YES

Installation Manual 75

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.

Outdoor Units

Terminal block on the main PCB

SODU

IDU

INTERNET

DRY1

DRY2

GND

12V

B(D)

A(C)

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 Unit

Electrical Wiring

Outdoor unit Dry Contact installation and connection

• Connect wires as below figure at the hole of backside of Outdoor Unit Dry Contact.

• Insert the wire in the connection hole pushing the "Push" button.

• Setting Main PCB Dip SW of Master Outdoor Unit.

Mode Change

Fan

Outdoor Unit

Heating

Cooling

Push Button

Installation Manual 77

Test Run

Checks Before 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.

Functions of each Test run steps

Step 0. Verify the command signals

Select function to be executed during the test run

Step 1. Examine Sensor

Examine the normal operations of the sensors attached to the outdoor/indoor units

Step 2. Examine Indoor unit EEV and wrong wirings

Examine the normal operation of EEV attached to the indoor unit, and examine the wirings of the indoor unit.

Step 3. Refrigerant Automatic Recharge

If additional bottling of the refrigerant is needed, operate to perform this automatically.

Step 4. Automatic Refrigerant Decisions

Inspect if the bottled refrigerant in the system has adequate quantity.

Step 5. Integrated Test Run

Process to verify the normal operations of the parts attached to the system, and verify normal operation of the sys-

tem.

Step 6. Real-time sensor checking

Check the sensors while operating in real-time.

h Gas pipes and Liquid pipes connections inspection

: Inspect whether the gas pipes and Liquid pipes are connected to each other.

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)

Outdoor Unit

Test Run

How to Cope with Test Run Abnormality

The phenomena from main component failure

Component

Phenomenon

Not operating

Cause

Check method and Trouble shooting

Motor insulation broken Check resistance between terminals and

chassis

Strainer clogged

Oil leakage

Change strainer

Check oil amount after opening oil port

Compressor

Stop during running Motor insulation failure Check resistance between terminals and

chassis

Abnormal noise

during running

R-S-T misconnection

Check compressor R-S-T connection

High pressure error Motor failure,

Check the outdoor fan operation after being

Outdoor

fan

at cooling

bad ventilation around turned the outdoor units off for some time.

outdoor heat exchanger Remove obstacles around the outdoor units

Heating failure, fre- Bad connector contact Check connector

quent defrosting

No operating sound Coil failure

Check resistance between terminals

at applying power

Outdoor

EEV

Heating failure,

frozen outdoor heat

exchanger part

Low pressure error

or discharge temper-

ature error

EEV clogged

Service necessary

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

Installation Manual 79

Test Run

Sensor Checking Function

Sensor checking function judges whether the current temperature of indoor and outdoor unit sensors i^Ns^otr^eig¹⁾ht

or not. -3 indoor temperature sensors, 9 outdoor temperature sensors, 2 outdoor pressure sensors.

It is used for judging sensor abnormality. Note 2)

DIP Switch Settings

Start

- Setting1

(Refrigerant Auto Recharge)

3 minutes

past after power

reset

- Setting2

(Refrigerant Quantity Auto

Decide)

YES

DIP switch set

- Setting3

(Indoor EEV malfunction

check - cooling)

- Setting4

Setting 1

Setting 2

Setting 3

Setting 4

Setting 5

(Indoor EEV malfunction

check - heating)

Note 3)

- Setting5

(Integrated Test Run -

cooling)

Warning : Please reset Main PCB before starting this function

Press black button

for 2 seconds

Press black button for

5 seconds

Sensor Normal

YES

Setting 1

Setting 2

Setting 3

Setting 4

Setting 5

Display Error

Press black button for 2 seconds

End

Indoor EEV

All DIP switches OFF and press black

button for 2 seconds

Refrigerant

Auto decide

Inspection

C: Cooing

E: Cooling

Auto Recharge

Data Reset and Wait

Start Inspection of each Function

Note 1. Sensor Check Function is used along with refrigerant quantity auto check function and refrigerant auto recharge

function.

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.

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 normal according to the installed location and the temperature

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

Outdoor Unit

Test Run

Sensor Check Error Code Display

In case error occurs during sensor checking process, error display is as shown below.

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

Indoor sensor error :

319

Outdoor sensor error :

309

* 5 number of errors is displayed

Displaying error content

continuously and repeatedly.

Displaying error content

■ Indoor unit error display

1.1st and 2nd number represents indoor unit number.

2. Last number represents sensor.

ex) Indoor unit No. 2 Pipe inlet temperature sensor

error

1: Pipe inlet temperature sensor

2: Pipe outlet temperature sensor

3: Air temperature sensor

■ Displaying outdoor unit error

1.1st and 2nd number represents error content(code).

2.Last number represents outdoor unit number.

ex) Outdoor Master Unit Liquid pipe temperature

sensor error

1 : Master

2 : Slave 1

3 : Slave 2

4 : Slave 3

* Indoor unit number follows auto addressing number.

(To check the LGMV Data)

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

ODU suction temperature sensor, Slave 3 high pressure

sensor error

No.

Sensor type

Outdoor Air Temperature

Heat Exchanger Temperature

Partition Heat Exchanger Temperature(Upper)

Partition Heat Exchanger Temperature(Low)

Liquid Pipe Temperature

SC pipe out

Suction Temperature

.......

Inverter Comp. Discharge Temperature

Constant Comp.1 Discharge Temperature

Constant Comp.2 Discharge Temperature

High Pressure

Caution

Low Pressure

IPM temperature

1. Up to 5 number of errors is displayed continuously and

repeatedly. In case 5 error occurs, again perform sensor

checking after solving errors.

2. IDU in which error occurred operates air circulation mode.

Installation Manual 81

Test Run

Refrigerant Auto Charging (Setting 1)

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.

Note

Start

1. After installing the refrigerant charging

device

as shown below in figure,

Main PCB

SW01S

open the valve.

Wait for 3 min. after power reset

2. In case air temperature is out of guaranteed

temperature, it may end without performing

auto charging.

Main PCB

SW01B

SW02B

Set the Dip S/W.

3. Refrigerant Charging Time may change

according to the charging amount.

(Refrigerant Charging Time : about 1.5 min/lb)

Refrigerant Auto Changing : 1,2,7 ON

Main PCB

SW01V

Press the black button on main PCB.

( Press until ‘508’ is displayed )

Main PCB

SW01V

Press the black button on main PCB.

IDU runs with cooling mode In designated order.

Is it necessary to

charge refrigerant?

Yes

*1)

Press the black button

Refrigerant Auto

Charging Process

IDU and ODU are turned off when Auto Charging

is completed. Close the valve.

*2)

Main PCB

SW01V

Press the black button

Press the black button for 2 sec. after turning off

all of dip S/W.

Completed.

Outdoor Unit

Test Run

Liquid Pipe

Gas Pipe

manifold

Capillary Assembly

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

n Error contents about auto refrigerant charging function

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

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

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

ed Capillary Assembly)

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

after the starting operation)

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 (77°F)

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

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

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

Installation Manual 83

Test Run

Refrigerant Checking Function (Setting 2)

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

2. This function judges refrigerant leakage and overcharging.

3. It can be used with refrigerant auto charging function.

DIP Switch Settings

Inspection Start

Warning : Please reset Main PCB before start-

ing this function

Press black button for 2 seconds

Display Error

YES

Proper Temperature

Thermo off indoor unit

YES

Decide Refrigerant Quantity

Display Error

Based on Refrigerant Quantity

Press black button for 2 seconds

End

Refrigerant

Gas/Liquid

Too much

Not enough

Refrigerant

Cannot tell

Quantity

pipe direct

connection

Refrigerant

Quantity

Normal

Press black button for 2 seconds

Data Reset and Wait

Indoor Unit OFF

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.

Outdoor Unit

Test Run

CAUTION

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

IDU : 20 ~ 35 °C

ODU : 0 ~ 43 °C

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.

[ Error contents about auto refrigerant charging function ]

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

: 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.

Installation Manual 85

Test Run

IDU EEV Abnormal Checking Function (Setting 3,4)

1. Operate system.

2. Check refrigerant amount of incoming to IDU throughout the IDU EEV.

3. Judge IDU temperature sensor.

4. Judge IDU EEV and IDU to ODU wiring.

Dip Switch Setting

Cooling

Heating

C : Cooling Mode

D : Heating Mode

Start

Caution

Please start these functions after

main PCB reset.

Press the black button for 2 sec

Temp. Condition

Yes

Error Display

Check IDU EEV Operation

Normal

Note 1

Error Display

Yes

End

Press the black button for 2 sec

Press the black button for 2 sec.

after turning off all of Dip switch.

Completed

Note 1

No. of IDU

IDU Fan Operation

CAUTION

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

1) Cooling mode : Indoor : 18~32°C, Outdoor : 10~43°C

2) Heating mode : Indoor : 18~33°C, Outdoor : -5~24°C

Outdoor Unit

Test Run

Integrated Test Running Function_Cooling Mode (Setting 5)

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 cooling mode.

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

• Saved data can check using LGMV.

Dip Switch Setting

Start

Press the black button for 2 sec

Caution

Please start these functions after

main PCB reset.

All IDU operation on

Cooling mode

Temp. Condition

Yes

Error Display

Thermo off

IDU judge

Yes

Error Display

Refrigerant amount judge

during all IDU operation

data on Test Runing(15min)

Press the black button for 2 sec

1 IDU operation

Note 1

End

1 IDU operation data

(10min)

Press the black button for 2 sec.

after turning off all of Dip switch.

Completed

Note

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

Installation Manual 87

Test Run

Night Low Noise Function

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

night which has low cooling load.

Max. RPM setting method

Master ODU

Dip S/W No.12+14 ON

SW01B

Master ODU

Main PCB Power Reset

SW01S

Note 1)

SW01V

Setting the Fan Max. RPM

SW02V

Setting Complete

Example of Max. RPM Setting

Fan Max. RPM : Step 1

- Night silent operation start

ﬁ 8 hours after max. ODU temp. sensing, the fan max. RPM is operated setting RPM.

- Night silent operation end

ﬁ 9 hours after Night silent operation is started, the function should be stopped automatically.

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.

[Note]

1. Select appropriate RPM referencing noise table.

RPM / Time Settings

Noise

Capacity

29~41kW

Noise(dB)

Capacity

Judgment Operation

46~58kW

16~23kW

Cooling Only

Step

Cooling Only 16~23kW 29~41kW

46~58kW Time(Hr) Time(Hr)

Fan Maximum RPM

Step

Standard

6.5

10.5

730

620

510

790

680

620

900

800

780

6.5

10.5

6.5

10.5

Outdoor Unit

Test Run

Vacuum Mode

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

ment or IDU addition/replacement.

Vacuum mode setting method

ODU power reset

Vacuum mode cancellation method

Main PCB

SW01S

Master main PCB DIP switch OFF( No.11,14)

Main PCB

SW02B

Power reset

Master main PCB DIP switch ON ( No.11,14)

Press the black button Main PCB (5 sec.)

Vacuum mode cancellation

Main PCB

SW01V

Vacuum mode setting

ODU V/V OPEN

Main EEV, SC EEV OPEN

IDU EEV OPEN

Caution

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

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 : Master ODU Main PCB SW02B NO.13 Dip S/W

Static pressure compensation mode setting

method

Static pressure compensation mode cancellation

method

DIP switch setting

DIP switch OFF

Power Reset

High static pressure:No. 13

Power Reset

Static pressure compensation mode is cancelled

Static pressure compensation mode is set

Installation Manual 89

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 LEDꢀof

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

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

Display

Title

Cause of Error

Air temperature sensor of indoor unit

Air temperature sensor of indoor unit is open or short

Inlet pipe temperature sensor of indoor unit Inlet pipe temperature sensor of indoor unit is open or short

Communication error : wired remote con-

Failing to receive wired remote controller signal in indoor

unit PCB

troller ÷ indoor unit

Drain pump

Malfunction of drain pump

Communication error : outdoor unit ÷

Failing to receive outdoor unit signal in indoor unit PCB

indoor unit

Outlet pipe temperature sensor of indoor

unit

Outlet pipe temperature sensor of indoor unit is open or

short

In case when the serial number marked on EEPROM of

Indoor unit is 0 or FFFFFF

Indoor EEPROM Error

Disconnecting the fan motor connector/Failure of indoor

fan motor lock

Poor fan motor operation

Inlet Air temperature sensor of FAU

Air temperature sensor of indoor unit is open or short

Master Outdoor Unit Inverter Compressor Drive IPM Fault

Slave1 Outdoor Unit Inverter Compressor Drive IPM Fault

Slave2 Outdoor Unit Inverter Compressor Drive IPM Fault

Slave3 Outdoor Unit Inverter Compressor Drive IPM Fault

Master Outdoor Unit Inverter Compressor

IPM Fault

Slave1 Outdoor Unit Inverter Compressor

IPM Fault

Slave2 Outdoor Unit Inverter Compressor

IPM Fault

Slave3 Outdoor Unit Inverter Compressor

IPM Fault

Inverter Board Input Over Current(RMS) of Master Outdoor Unit Inverter Board Input Current excess

Master Outdoor Unit

Inverter Board Input Over Current(RMS) of Slave1 Outdoor Unit Inverter Board Input Current excess

Slave1 Outdoor Unit (RMS)

Inverter Board Input Over Current(RMS) of Slave2 Outdoor Unit Inverter Board Input Current excess

Slave2 Outdoor Unit (RMS)

Inverter Board Input Over Current(RMS) of Slave3 Outdoor Unit Inverter Board Input Current excess

Slave3 Outdoor Unit (RMS)

(RMS)

Outdoor Unit

Test Run

Display

Title

Cause of Error

DC charging is not performed at Master Outdoor Unit

Master Outdoor Unit Inverter

after starting relay turn on.

Compressor DC link Low Voltage

DC charging is not performed at Slave1 Outdoor Unit

after starting relay turn on.

Slave1 Outdoor Unit Inverter

Compressor DC link Low Voltage

DC charging is not performed at Slave2 Outdoor Unit

Slave2 Outdoor Unit Inverter

after starting relay turn on.

Compressor DC link Low Voltage

DC charging is not performed at Slave3 Outdoor Unit

after starting relay turn on.

Slave3 Outdoor Unit Inverter

Compressor DC link Low Voltage

Master Outdoor Unit High

System is turned off by Master Outdoor Unit high pres-

Pressure Switch

sure switch.

Slave1 Outdoor Unit High

Pressure Switch

System is turned off by slave1 Outdoor Unit high pres-

sure switch.

Slave2 Outdoor Unit High

System is turned off by slave2 Outdoor Unit high pres-

Pressure Switch

sure switch.

Slave3 Outdoor Unit High

Pressure Switch

System is turned off by slave3 Outdoor Unit high pres-

sure switch.

Master Outdoor Unit Input Voltage

Master Outdoor Unit input voltage is over 487V or

High/ Low Voltage

below 270V

Slave1 Outdoor Unit Input Voltage

High/ Low Voltage

Slave1 Outdoor Unit input voltage is over 487V or

below 270V

Slave2 Outdoor Unit Input Voltage

Slave2 Outdoor Unit input voltage is over 487V or

High/ Low Voltage

below 270V

Slave3 Outdoor Unit Input Voltage

High/ Low Voltage

Slave3 Outdoor Unit input voltage is over 487V or

below 270V

Master Outdoor Unit Inverter

The First Start Failure by Master Outdoor Unit Inverter

Compressor Start Failure

Compressor Abnormality

Slave1 Outdoor Unit Inverter

Compressor Start Failure

The First Start Failure by Slave1 Outdoor Unit Inverter

Compressor Abnormality

Slave2 Outdoor Unit Inverter

The First Start Failure by Slave2 Outdoor Unit Inverter

Compressor Start Failure

Compressor Abnormality

Slave3 Outdoor Unit Inverter

Compressor Start Failure

The First Start Failure by Slave3 Outdoor Unit Inverter

Compressor Abnormality

Master Outdoor Unit Inverter DC

link High Voltage

System is turned off by Master Outdoor Unit DC

Voltage Over Charging

Slave1 Outdoor Unit Inverter DC

System is turned off by Slave1 Outdoor Unit DC

link High Voltage

Voltage Over Charging

Slave2 Outdoor Unit Inverter DC

link High Voltage

System is turned off by Slave2 Outdoor Unit DC

Voltage Over Charging

Slave3 Outdoor Unit Inverter DC

System is turned off by Slave3 Outdoor Unit DC

link High Voltage

Voltage Over Charging

Master Outdoor Unit Inverter Compressor Fault OR

Drive Fault

Master Outdoor Unit Inverter

Compressor Over Current

Slave1 Outdoor Unit Inverter Compressor Fault OR

Slave1 Outdoor Unit Inverter

Drive Fault

Compressor Over Current

Slave2 Outdoor Unit Inverter Compressor Fault OR

Drive Fault

Slave2 Outdoor Unit Inverter

Compressor Over Current

Slave3 Outdoor Unit Inverter Compressor Fault OR

Slave3 Outdoor Unit Inverter

Drive Fault

Compressor Over Current

Installation Manual 91

Test Run

Display

Title

Cause of Error

Master Outdoor Unit Constant Speed

System is turned off by Master Outdoor Uunit Constant Speed

Compressor2 High Discharge Temperature

Slave1 Outdoor Unit Constant Speed

System is turned off by Slave1 Outdoor Unit Constant Speed

Compressor2 High Discharge Temperature

Slave2 Outdoor Unit Constant Speed

System is turned off by Slave2 Outdoor Unit Constant Speed

Compressor2 High Discharge Temperature

Slave3 Outdoor Unit Constant Speed

System is turned off by Slave3 Outdoor Unit Constant Speed

Compressor2 High Discharge Temperature

Master Outdoor Unit Inverter Compressor

System is turned off by Master Outdoor Unit Inverter Compressor

High Discharge Temperature

Slave1 Outdoor Unit Inverter Compressor

High Discharge Temperature

System is turned off by Slave1 Outdoor Unit Inverter Compressor

High Discharge Temperature

Slave2 Outdoor Unit Inverter Compressor

System is turned off by Slave2 Outdoor Unit Inverter Compressor

Discharge High Temperature

High Discharge Temperature

Slave3 Outdoor Unit Inverter Compressor

High Discharge Temperature

System is turned off by Slave3 Outdoor Unit Inverter Compressor

High Discharge Temperature

Master Outdoor Unit Constant Speed

System is turned off by Master Outdoor Uunit Constant Speed

Compressor1 High Discharge Temperature

Slave1 Outdoor Unit Constant Speed

System is turned off by Slave1 Outdoor Unit Constant Speed

Compressor1 High Discharge Temperature

Slave2 Outdoor Unit Constant Speed

System is turned off by Slave2 Outdoor Unit Constant Speed

Compressor1 High Discharge Temperature

Slave3 Outdoor Unit Constant Speed

System is turned off by Slave3 Outdoor Unit Constant Speed

Compressor1 High Discharge Temperature

High Pressure of Master Outdoor Unit

High Pressure of Slave1 Outdoor Unit

High Pressure of Slave2 Outdoor Unit

High Pressure of Slave3 Outdoor Unit

Low Pressure of Master Outdoor Unit

Low Pressure of Slave1 Outdoor Unit

Low Pressure of Slave2 Outdoor Unit

Low Pressure of Slave3 Outdoor Unit

System is turned off by excessive increase of high pressure of

Master 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 increase of high pressure of

Slave3 Outdoor Unit

System is turned off by excessive decrease of low pressure of

Master 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

System is turned off by excessive decrease of low pressure of

Slave3 Outdoor Unit

Master Outdoor Unit Low Condensing

Ratio Limited

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

Slave3 Outdoor Unit stayed under low condensing limit for 3 minutes

Slave1 Outdoor Unit Low Condensing

Ratio Limited

Slave2 Outdoor Unit Low Condensing

Ratio Limited

Slave3 Outdoor Unit Low Condensing

Ratio Limited

Outdoor Unit

Test Run

Display

Title

Cause of Error

Master Outdoor Unit Inverter Compressor CT Sensor

Master Outdoor Unit Inverter

Compressor CT Sensor Fault

open or short

Slave1 Outdoor Unit Inverter

Compressor CT Sensor Fault

Slave1 Outdoor Unit Inverter Compressor CT Sensor

open or short

Slave2 Outdoor Unit Inverter

Slave2 Outdoor Unit Inverter Compressor CT Sensor

Compressor CT Sensor Fault

open or short

Slave3 Outdoor Unit Inverter

Compressor CT Sensor Fault

Slave3 Outdoor Unit Inverter Compressor CT Sensor

open or short

Master Outdoor Unit Inverter

Compressor Discharge

Master Outdoor Unit Inverter Compressor Discharge

Temperature Sensor open or short

Temperature Sensor Fault

Slave1 Outdoor Unit Inverter

Slave1 Outdoor Unit Inverter Compressor Discharge

Temperature Sensor open or short

Compressor Discharge

Temperature Sensor Fault

Slave2 Outdoor Unit Inverter

Slave2 Outdoor Unit Inverter Compressor Discharge

Temperature Sensor open or short

Compressor Discharge

Temperature Sensor Fault

Slave3 Outdoor Unit Inverter

Slave3 Outdoor Unit Inverter Compressor Discharge

Temperature Sensor open or short

Compressor Discharge

Temperature Sensor Fault

Master Outdoor Unit Low Pressure

Master Outdoor Unit Low Pressure Sensor open or

short

Sensor Fault

Slave1 Outdoor Unit Low Pressure

Sensor Fault

Slave1 Outdoor Unit Low Pressure Sensor open or

short

Slave2 Outdoor Unit Low Pressure

Slave2 Outdoor Unit Low Pressure Sensor open or

short

Sensor Fault

Slave3 Outdoor Unit Low Pressure

Sensor Fault

Slave3 Outdoor Unit Low Pressure Sensor open or

short

Master Outdoor Unit High

Master Outdoor Unit High Pressure Sensor open or

short

Pressure Sensor Fault

Slave1 Outdoor Unit High

Pressure Sensor Fault

Slave1 Outdoor Unit High Pressure Sensor open or

short

Slave2 Outdoor Unit High

Slave2 Outdoor Unit High Pressure Sensor open or

short

Pressure Sensor Fault

Slave3 Outdoor Unit High

Pressure Sensor Fault

Slave3 Outdoor Unit High Pressure Sensor open or

short

Master Outdoor Unit Air

Master Outdoor Unit Air Temperature Sensor open or

short

Temperature Sensor Fault

Slave1 Outdoor Unit Air

Slave1 Outdoor Unit Air Temperature Sensor open or

Temperature Sensor Fault

short

Slave2 Outdoor Unit Air

Slave2 Outdoor Unit Air Temperature Sensor open or

short

Temperature Sensor Fault

Slave3 Outdoor Unit Air

Slave3 Outdoor Unit Air Temperature Sensor open or

Temperature Sensor Fault

short

Installation Manual 93

Test Run

Display

Title

Cause of Error

Master Outdoor Unit Heat Exchanger Temperature

Master Outdoor Unit Heat

Exchanger Temperature Sensor

(Front side) Fault

Sensor(Front side) open or short

Slave1 Outdoor Unit Heat Exchanger Temperature

Sensor (Front side) open or short

Slave1 Outdoor Unit Heat

Exchanger Temperature Sensor

(Front side) Fault

Slave2 Outdoor Unit Heat

Exchanger Temperature Sensor

(Front side) Fault

Slave3 Outdoor Unit Heat

Exchanger Temperature Sensor

(Front side) Fault

Slave2 Outdoor Unit Heat Exchanger Temperature

Sensor(Front side) open or short

Slave3 Outdoor Unit Heat Exchanger Temperature

Sensor(Front side) open or short

Master Outdoor Unit Suction Temperature Sensor

open or short

Master Outdoor Unit Suction

Temperature Sensor Fault

Slave1 Outdoor Unit Suction Temperature Sensor

Slave1 Outdoor Unit Suction

Temperature Sensor Fault

open or short

Slave2 Outdoor Unit Suction Temperature Sensor

open or short

Slave2 Outdoor Unit Suction

Temperature Sensor Fault

Slave3 Outdoor Unit Suction Temperature Sensor

Slave3 Outdoor Unit Suction

Temperature Sensor Fault

open or short

Master Outdoor Unit Constant Speed Compressor1

Discharge Temperature Sensor open or short

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

Slave3 Outdoor Unit Constant

Speed Compressor1 Discharge

Temperature Sensor Fault

Slave1 Outdoor Unit Constant Speed Compressor1

Discharge Temperature Sensor open or short

Slave2 Outdoor Unit Constant Speed Compressor1

Discharge Temperature Sensor open or short

Slave3 Outdoor Unit Constant Speed Compressor1

Discharge Temperature Sensor open or short

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

Slave3 Outdoor Unit Constant

Speed Compressor2 Discharge

Temperature Sensor Fault

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

Slave3 Outdoor Unit Constant Speed Compressor 2

Discharge Temperature Sensor open or short

Outdoor Unit

Test Run

Display

Title

Cause of Error

Master Outdoor Unit IPM Temperature Sensor

Master Outdoor Unit Faulty IPM

short/open

Temperature Sensor

Slave1 Outdoor Unit IPM Temperature Sensor

short/open

Slave1 Outdoor Unit Faulty IPM

Temperature Sensor

Slave2 Outdoor Unit IPM Temperature Sensor

Slave2 Outdoor Unit Faulty IPM

short/open

Temperature Sensor

Slave3 Outdoor Unit IPM Temperature Sensor

short/open

Slave3 Outdoor Unit Faulty IPM

Temperature Sensor

Omitting connection of Master outdoor unit

Omitting connection of Slave1 Outdoor Unit

Omitting connection of Slave2 Outdoor Unit

Omitting connection of Slave3 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

Omitting connection of R, S, T

power of Slave3 Outdoor Unit

Excessive capacity of indoor units

Excessive connection of indoor units compared to

capacity of Outdoor Unit

Failing to receive inverter signal at main PCB of Master

Transmission error : inverter PCB

Outdoor Unit

’ Main PCB

Failing to receive inverter signal at main PCB of Slave1

Outdoor Unit

Transmission error : inverter PCB

’ Main PCB

Failing to receive inverter signal at main PCB of Slave2

Transmission error : inverter PCB

Outdoor Unit

’ Main PCB

Failing to receive inverter signal at main PCB of Slave3

Outdoor Unit

Transmission error : inverter PCB

’ Main PCB

Failing to receive indoor unit signal at main PCB of

Transmission error : indoor unit ’

Outdoor Unit .

main PCB of Outdoor Unit

Reverse connection or omitting connection of R, S, T

power of Master Outdoor Unit

Reverse connection of R, S, T

power of Master Outdoor Unit

Reverse connection or omitting connection of R, S, T

Reverse connection of R, S, T

power of Slave1 Outdoor Unit

Reverse connection or omitting connection of R, S, T

power of Slave2 Outdoor Unit

Reverse connection of R, S, T

power of Slave2 Outdoor Unit

Reverse connection or omitting connection of R, S, T

Reverse connection of R, S, T

power of Slave3 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)

Master Outdoor Unit

Communication Error with Inverter

Controller

Slave1 Outdoor Unit

Communication Error with Inverter

Controller

Slave2 Outdoor Unit

Communication Error with Inverter

Controller

Slave3 Outdoor Unit Controller part cannot receive

inverter control signals (usually happens after on-

boarding)

Slave3 Outdoor Unit

Communication Error with Inverter

Controller

Mixing Installation of Old Sub Outdoor Unit and New

Mixing Installation of Sub Outdoor

Slave Outdoor Unit

Unit

Installation Manual 95

Test Run

Display

Title

Cause of Error

Access Error of Inverter PCB of Master Outdoor Unit

Inverter PCB EEPROM Error of

Master Outdoor Unit

Inverter PCB EEPROM Error of

Slave1 Unit

Access Error of Inverter PCB of Slave1 Outdoor Unit

Access Error of Inverter PCB of Slave2 Outdoor Unit

Access Error of Inverter PCB of Slave3 Outdoor Unit

Inverter PCB EEPROM Error of

Slave2 Unit

Inverter PCB EEPROM Error of

Slave3 Unit

Master Outdoor Unit Fan Lock

Slave1 Outdoor Unit Fan Lock

Slave2 Outdoor Unit Fan Lock

Slave3 Outdoor Unit Fan Lock

Restriction of Master Outdoor Unit

Restriction of Slave1 Outdoor Unit

Restriction of Slave2 Outdoor Unit

Restriction of Slave3 Outdoor Unit

Constant1 CT Sensor open or short of Master Outdoor

Constant1 CT Sensor Error of

Unit

Master Outdoor Unit

Constant1 CT Sensor open or short of Slave1 Outdoor

Unit

Constant1 CT Sensor Error of

Slave1 Outdoor Unit

Constant1 CT Sensor open or short of Slave2 Outdoor

Constant1 CT Sensor Error of

Unit

Slave2 Outdoor Unit

Constant1 CT Sensor open or short of Slave3 Outdoor

Unit

Constant1 CT Sensor Error of

Slave3 Outdoor Unit

Constant2 CT Sensor open or short of Master Outdoor

Constant2 CT Sensor Error of

Unit

Master Outdoor Unit

Constant2 CT Sensor open or short of Slave1 Outdoor

Unit

Constant2 CT Sensor Error of

Slave1 Outdoor Unit

Constant2 CT Sensor open or short of Slave2 Outdoor

Constant2 CT Sensor Error of

Unit

Slave2 Outdoor Unit

Constant2 CT Sensor open or short of Slave3 Outdoor

Unit

Constant2 CT Sensor Error of

Slave3 Outdoor Unit

Instant Over Current(Peak) of

Instant Over Current(Peak) of Master Outdoor Unit

Master Outdoor Unit PFC

PFC

Instant Over Current(Peak) of

Slave1 Outdoor Unit PFC

Instant Over Current(Peak) of Slave1 Outdoor Unit

PFC

Instant Over Current(Peak) of

Instant Over Current(Peak) of Slave2 Outdoor Unit

Slave2 Outdoor Unit PFC

PFC

Instant Over Current(Peak) of

Slave3 Outdoor Unit PFC

Instant Over Current(Peak) of Slave3 Outdoor Unit

PFC

Master Outdoor Unit Fan CT

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

Slave3 Outdoor Unit Fan CT Sensor open or short

Sensor Error

Slave1 Outdoor Unit Fan CT

Sensor Error

Slave2 Outdoor Unit Fan CT

Sensor Error

Slave3 Outdoor Unit Fan CT

Sensor Error

Outdoor Unit

Test Run

Display

Title

Cause of Error

Master Outdoor Unit Fan DC Link Master Outdoor Unit Fan DC Link High Voltage Error

High Voltage Error

Slave1 Outdoor Unit Fan DC Link Slave1 Outdoor Unit Fan DC Link High Voltage Error

High Voltage Error

Slave2 Outdoor Unit Fan DC Link Slave2 Outdoor Unit Fan DC Link High Voltage Error

High Voltage Error

Slave3 Outdoor Unit Fan DC Link Slave3 Outdoor Unit Fan DC Link High Voltage Error

High Voltage Error

Master Outdoor Unit Fan Current is over 5A

Slave1 Outdoor Unit Fan is over 5A

Slave2 Outdoor Unit Fan is over 5A

Slave3 Outdoor Unit Fan is over 5A

Master Outdoor Unit Fan Over

Current Error

Slave1 Outdoor Unit Fan Over

Current Error

Slave2 Outdoor Unit Fan Over

Current Error

Slave3 Outdoor Unit Fan Over

Current Error

Master Outdoor Unit Fan Start

Master Outdoor Unit Fan First Position Sensing Failure

Slave1 Outdoor Unit Fan First Position Sensing Failure

Slave2 Outdoor Unit Fan First Position Sensing Failure

Slave3 Outdoor Unit Fan First Position Sensing Failure

Failure Error

Slave1 Outdoor Unit Fan Start

Failure Error

Slave2 Outdoor Unit Fan Start

Failure Error

Slave3 Outdoor Unit Fan Start

Failure Error

Master Outdoor Unit Main PCB

Communication Fail Between Master Outdoor Unit

Main MICOM and EEPROM or omitting EEPROM

EEPROM Error

Slave1 Outdoor Unit Main PCB

EEPROM Error

Communication Fail Between Slave1 Outdoor Unit

Main MICOM and EEPROM or omitting EEPROM

Slave2 Outdoor Unit Main PCB

Communication Fail Between Slave2 Outdoor Unit

Main MICOM and EEPROM or omitting EEPROM

EEPROM Error

Slave3 Outdoor Unit Main PCB

EEPROM Error

Communication Fail Between Slave3 Outdoor Unit

Main MICOM and EEPROM or omitting EEPROM

Master Outdoor Unit Fan PCB

Communication Fail Between Master Outdoor Unit Fan

MICOM and EEPROM or omitting EEPROM

EEPROM Error

Slave1 Outdoor Unit Fan PCB

EEPROM Error

Communication Fail Between Slave1 Outdoor Unit Fan

MICOM and EEPROM or omitting EEPROM

Slave2 Outdoor Unit Fan PCB

Communication Fail Between Slave2 Outdoor Unit Fan

MICOM and EEPROM or omitting EEPROM

EEPROM Error

Slave3 Outdoor Unit Fan PCB

EEPROM Error

Communication Fail Between Slave3 Outdoor Unit Fan

MICOM and EEPROM or omitting EEPROM

Installation Manual 97

Test Run

Display

Title

Cause of Error

Failing to receive Slave Unit signal at main PCB of

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

Communication Error Between

Slave3 Outdoor Unit and Other

Outdoor Unit

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 master and other Slave Unit signal at

main PCB of Slave3 Outdoor Unit

Failing to receive fan signal at main PCB of master

unit.

Master Outdoor Unit Fan PCB

Communication Error

Failing to receive fan signal at main PCB of Slave1

Slave1 Outdoor Unit Fan PCB

Communication Error

unit.

Failing to receive fan signal at main PCB of Slave2

unit.

Slave2 Outdoor Unit Fan PCB

Communication Error

Failing to receive fan signal at main PCB of Slave3

Slave3 Outdoor Unit Fan PCB

Communication Error

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

Instant Over Current at Slave3 Outdoor Unit Fan IPM

Master Outdoor Unit FAN IPM

Fault Error

Slave1 Outdoor Unit FAN IPM

Fault Error

Slave2 Outdoor Unit FAN IPM

Fault Error

Slave3 Outdoor Unit FAN IPM

Fault Error

Master Outdoor Unit Fan DC Link Input Voltage is

under 380V

Master Outdoor Unit Fan DC Link

Low Voltage Error

Slave1 Outdoor Unit Fan DC Link Input Voltage is

Slave1 Outdoor Unit Fan DC Link

Low Voltage Error

under 380V

Slave2 Outdoor Unit Fan DC Link Input Voltage is

under 380V

Slave2 Outdoor Unit Fan DC Link

Low Voltage Error

Slave3 Outdoor Uni Fan DC Link Input Voltage is

Slave3 Outdoor Unit Fan DC Link

Low Voltage Error

under 380V

Liquid pipe temperature sensor of Master Outdoor Unit

is open or short

Master Outdoor Unit Liquid pipe

Temperature Sensor Error

Liquid pipe temperature sensor of slave1 Outdoor Unit

Slave1 Outdoor Unit Liquid pipe

Temperature Sensor Error

is open or short

Liquid pipe temperature sensor of slave2 Outdoor Unit

is open or short

Slave2 Outdoor Unit Liquid pipe

Temperature Sensor Error

Liquid pipe temperature sensor of slave3 Outdoor Unit

Slave3 Outdoor Unit Liquid pipe

Temperature Sensor Error

is open or short

Outdoor Unit

Test Run

Display

Title

Cause of Error

Master Outdoor Unit Subcooling Outlet Temperature

Master Outdoor Unit Subcooling

Outlet Temperature Sensor Error

Slave1 Outdoor Unit Subcooling

Outlet Temperature Sensor Error

Sensor open or short

Slave1 Outdoor Unit Subcooling Outlet Temperature

Sensor open or short

Slave2 Outdoor Unit Subcooling Outlet Temperature

Slave2 Outdoor Unit Subcooling

Outlet Temperature Sensor Error

Sensor open or short

Slave3 Outdoor Unit Subcooling

Outlet Temperature Sensor Error

Slave3 Outdoor Unit Subcooling Outlet Temperature

Sensor open or short

Master Outdoor Unit upper part temperature sensor

Master upper part heat exchanger

temperature sensor error

open/short

Slave1 upper part heat exchanger

temperature sensor error

Slave1 Outdoor Unit upper part temperature sensor

open/short

Slave2 Outdoor Unit upper part temperature sensor

Slave2 upper part heat exchanger

temperature sensor error

open/short

Slave3 upper part heat exchanger

temperature sensor error

Slave3 Outdoor Unit upper part temperature sensor

open/short

Master Outdoor Unit lower part temperature sensor

Master lower part heat exchanger

temperature sensor error

open/short

Slave1 lower part heat exchanger

temperature sensor error

Slave1 Outdoor Unit lower part temperature sensor

open/short

Slave2 Outdoor Unit lower part temperature sensor

Slave2 lower part heat exchanger

temperature sensor error

open/short

Slave3 lower part heat exchanger

temperature sensor error

Slave3 Outdoor Unit lower part temperature sensor

open/short

Master Outdoor Unit Constant

Speed Compressor Fault

Comp locking, Check Valve leakage, comp dielectric

break down at Master Outdoor Unit

Slave1 Outdoor Unit Constant

Comp locking, Check Valve leakage, comp dielectric at

Speed Compressor Fault

Slave1 Outdoor Unit

Slave2 Outdoor Unit Constant

Speed Compressor Fault

Comp locking, Check Valve leakage, comp dielectric at

Slave2 Outdoor Unit

Slave3 Outdoor Unit Constant

Comp locking, Check Valve leakage, comp dielectric at

Speed Compressor Fault

Slave3 Outdoor Unit

Master outdoor unit rated speed 2

condenser over-current

Master Outdoor Unit rated speed 2 condenser burned /

locked or fault by over-current

Slave1 outdoor unit rated speed 2

Slave1 Outdoor Unit rated speed 2 condenser burned /

condenser over-current

locked or fault by over-current

Slave2 outdoor unit rated speed 2

condenser over-current

Slave2 Outdoor Unit rated speed 2 condenser burned /

locked or fault by over-current

Slave3 outdoor unit rated speed 2

Slave3 Outdoor Unit rated speed 2 condenser burned /

condenser over-current

locked or fault by over-current

Master outdoor unit Main Board Main-

Sub Micom communication error

Master Outdoor Unit Main Board Main-Sub Micom

communication failed

Slave1 outdoor unit Main Board Main-

Slave1 Outdoor Unit Main Board Main-Sub Micom

Sub Micom communication error

communication failed

Slave2 outdoor unit Main Board Main-

Sub Micom communication error

Slave2 Outdoor Unit Main Board Main-Sub Micom

communication failed

Slave3 outdoor unit Main Board Main-

Slave3 Outdoor Unit Main Board Main-Sub Micom

Sub Micom communication error

communication failed

Installation Manual 99

Test Run

Display

Title

Cause of Error

Excessive increase of Master

Outdoor Unit Fan PCB Heat Sink

Temperature

Excessive increase of Slave1

Outdoor Unit Fan PCB Heat Sink

Temperature

Excessive increase of Slave2

Outdoor Unit Fan PCB Heat Sink

Temperature

Excessive increase of Slave3

Outdoor Unit Fan PCB Heat Sink

Temperature

Master Outdoor Unit Fan Inverter PCB Temperature is

Over 95°C

Slave1 Outdoor Unit Fan Inverter PCB Temperature is

Over 95°C

9 3

Slave2 Outdoor Unit Fan Inverter PCB Temperature is

Over 95°C

Slave3 Outdoor Unit Fan Inverter PCB Temperature is

Over 95°C

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

Slave2 Outdoor Unit Fan PCB

Heat Sink Temperature Sensor

Error

Slave3 Outdoor Unit Fan PCB

Heat Sink Temperature Sensor

Error

Slave1 Outdoor Unit Fan PCB Heat Sink Temperature

Sensor open or short

9 4

Slave2 Outdoor Unit Fan PCB Heat Sink Temperature

Sensor open or short

Slave3 Outdoor Unit Fan PCB Heat Sink Temperature

Sensor open or short

100

Outdoor Unit

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.

Introduction

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

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

Flow of

refrigerant

(No.1 system)

Indoor unit

Room where refrigerant leaks

(Refrigerant of the whole No.1

system flows out.)

Checking procedure of 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.

Amount of replenished

refrigerant per one outdoor

unit system

Amount of additional

replenished refrigerant

Total amount of replenished

refrigerant in refrigerant

facility (kg)

Note : In case one refrigerant facility is

Amount of replenished

refrigerant at factory shipment

Amount of additionally

replenished refrigerant

depending on piping

length or piping

divided into 2 or more refrigerant

systems and each system is

independent, amount of replenished

refrigerant of each system shall be

adopted.

diameter at customer

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

Outdoor unit

In the case of opening

without door , or 0.15

% or more openings

Indoor unit

Opening

(to floor space) both

above and below door)

Partition

Installation Manual 101

Caution For Refrigerant Leak

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

Outdoor unit

Indoor unit

Smallest

room

n Calculate refrigerant concentration

Total amount of replenished

refrigerant in refrigerant facility (kg)

In case the result of calculation exceeds

Refrigerant concentration

(kg/m³)

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.

Capacity of smallest room where

indoor unit is installed (m³)

(R410A)

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.

Gas leak alarm

Countermeasure 2

Mechanical ventilator

Indoor unit

Countermeasure 1

Opening effective to ventilation

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

heavier than air.

102

Outdoor Unit

Installation guide at the seaside

CAUTION

1. 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.

Sea wind

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

• It should be strong enough like concrete to prevent

Windbreak

the sea wind from the sea.

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

the outdoor unit.

Sea wind

• It should be keep more than 70 cm of space

between outdoor unit and the windbreak for easy

air flow.

3) Select a well-drained place.

1. If you can’t meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment.

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

Installation Manual 103

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