LG ARUN40GS2 INSTALLATION INSTRUCTIONS

Download

System

Outdoor Unit

INSTALLATION MANUAL

MODELS: ARUN Series ARUV Series

(1Ø, 220~240V, 50Hz / 1Ø, 220V, 60Hz)

website http://www.lgservice.com

IMPORTANT

• 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.

R410A

ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH

PORTUGUESE

2 Outdoor Unit

ARUN Series Outdoor Unit Installation Manual

TABLE OF CONTENTS

Safety Precautions.....................................................................................................3

Installation Process...................................................................................................7

Outdoor Units Information........................................................................................8

Before installation......................................................................................................9

Select the Best Location .........................................................................................10

Installation Space.....................................................................................................11

Installation................................................................................................................15

Refrigerant piping....................................................................................................18

Electrical Wiring.......................................................................................................37

Test Run....................................................................................................................52

Caution For Refrigerant Leak..................................................................................63

Installation guide at the seaside.............................................................................65

Safety Precautions

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

■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications.

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

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

Be sure not to do.

Be sure to follow the instruction.

■ 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.

• If the power source capacity is inadequate or

electric work is performed improperly, electric shock or fire may result.

Ask the dealer or an authorized technician to install the air conditioner.

• Improper installation by the user may result in water leakage, electric shock, or fire.

Always ground the product.

• There is risk of fire or electric shock.

Always intstall a dedicated circuit and breaker.

• Improper wiring or installation may cause fire or electric shock.

ENGLISH

Installation Manual 3

For re-installation of the installed product, always contact a dealer or an Authorized Service Center.

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

Do not install, remove, or re-install the unit by yourself (customer).

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

Do not store or use flammable gas or combustibles near the air conditioner.

• There is risk of fire or failure of product.

Use the correctly rated breaker or fuse.

• There is risk of fire or electric shock.

Prepare for strong wind or earthquake and install the unit at the specified place.

• Improper installation may cause the unit to topple and result in injury.

Do not install the product on a defective installation stand.

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

Ventilate before operating air conditioner when gas leaked out.

• It may cause explosion, fire, and burn.

Securely install the cover of control box and the panel.

• If the cover and panel are not installed securely, dust or water may enter the outdoor unit and fire or electric shock may result.

If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit when the refrigerant leaks.

• Consult the dealer regarding the appropriate measures to prevent the safety limit from being exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, harzards due to lack of oxygen in the room could result.

■ Operation

Do not damage or use an unspecified power cord.

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

Use a dedicated outlet for this appliance.

• There is risk of fire or electrical shock.

Be cautious that water could not enter the product.

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

Do not touch the power switch with wet hands.

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

4 Outdoor Unit

Safety Precautions

When installing and moving the air conditioner to another site, do not charge it with a different refrigerant from the refrigerant specified on the unit.

• If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.

Do not reconstruct to change the settings of the protection devices.

• If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or parts other than those specified by LGE are used, fire or explosion may result.

When the product is soaked (flooded or submerged), contact an Authorized Service Center.

• There is risk of fire or electric shock.

Be cautious not to touch the sharp edges when installing.

• It may cause injury.

T ake care to ensure that nobody could step on or fall onto the outdoor unit.

• This could result in personal injury and product damage.

Do not open the inlet grille of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.)

• There is risk of physical injury, electric shock, or product failure.

Installation Manual 5

ENGLISH

Safety Precautions

Use power cables of sufficient current carrying capacity and rating.

• Cables that are too small may leak, generate heat, and cause a fire.

Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigeration system.

• There is risk of damage or loss of property.

Keep the unit away from children. The heat exchanger is very sharp.

• It can cause the injury, such as cutting the finger. Also the damaged fin may result in degradation of capacity.

When installting the unit in a hospital, communication station, or similar place, provide sufficient protection against noise.

•

The inverter equipment, private power generator, high-frequency medical equipment, or radio communication equipment may cause the air conditioner to operate erroneously, 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.

■ Installation

Always check for gas (refrigerant) leakage after installation or repair of product.

• Low refrigerant levels may cause failure of product.

Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods.

• It may cause a problem for your neighbors.

Keep level even when installing the product.

• To avoid vibration or water leakage.

Do not install the unit where combustible gas may leak.

• If the gas leaks and accumulates around the unit, an explosion may result.

■ Operation

Do not use the air conditioner in special environments.

• Oil, steam, sulfuric smoke, etc. can significantly reduce the performance of the air conditioner or damage its parts.

Do not block the inlet or outlet.

• It may cause failure of appliance or accident.

Make the connections securely so that the outside force of the cable may not be applied to the terminals.

• Inadequate connection and fastening may generate heat and cause a fire.

Be sure the installation area does not deteriorate with age.

• If the base collapses, the air conditioner could fall with it, causing property damage, product failure, or personal injury.

6 Outdoor Unit

Safety Precautions

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.

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.

•

Packing materials, such as nails and other metal or wooden parts, may cause stabs or other injuries.

•

Tear apart and throw away plastic packaging bags so that children may not play with them. If children play with a plastic bag which was not torn apart, they face the risk of suffocation.

Turn on the power at least 6 hours before starting operation.

• Starting operation immediately after turning on the main power switch can result in severe damage to internal parts. Keep the power switch turned on during the operational season.

Do not touch any of the refrigerant piping during and after operation.

• It can cause a burn or frostbite.

Do not operate the air conditioner with the panels or guards removed.

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

• Be careful and avoid personal injury.

Do not insert hands or other objects through the air inlet or outlet while the air conditioner is plugged in.

• There are sharp and moving parts that could cause personal injury.

Installation

Installation Process

The foundation must be level even

Outdoor unit foundation work

Avoid short circuits and ensure sufficient space is allowed for service

Installation of outdoor unit

Automatic addressing of indoor unit

In the final check for 24hours at 3.8 MPa(38.7 kgf/cm

) there must be no drop in pressure.

Airtight test

Multiple core cable must not be used. (suitable cable should be selected)

Electrical work

(connection circuits and drive circuits)

Make sure no gaps are left where the insulating materials are joined

Heat insulation work

Make sure airflow is sufficient

Duct work

Adjust to downward gradient

Drain pipe work

Special attention to dryness, cleanness and tightness

Refrigerant piping work

Check model name to make sure the fitting is made correctly

Installation of indoor unit

Take account of gradient of drain piping

Sleeve and insert work

Make relationship between outdoor, indoor, remote controller, and option connections clear. (Prepare control circuit diagram)

Preparation of contract drawings

Indicate clearly who is to be responsible for switch settings

Determination of division work

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

Vacuum drying

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

Additional charge of refrigerant

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

Fit facing panels

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

Test run adjustment

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

Transfer to customer with explanation

Refer to automatic addressing flowchart Preheat the crank case with the electrical heater for more than 6 hours. (In case of outdoor temperature below 10℃)

• The above list indicates the order in which the individual work operations are normally carried out but this order may be varied where local conditions warrants such change.

• The wall thickness of the piping should comply with the relevant local and national regulations for the designed pressure 3.8MPa.

• 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.)

ENGLISH

Installation Manual 7

8 Outdoor Unit

Outdoor Units Information

CAUTION

Ratio of the connectable Indoor Units to the Outdoor: Within 50 ~ 130% Ratio of running Indoor Units to the Outdoor: Within 10 ~ 100% A combination operation over 100% cause to reduce each indoor unit capacity.

Power Supply: Outdoor Unit (1Ø, 220~240V, 50Hz/1Ø, 220V, 60Hz)

Connectable Indoor Unit

should be connected with 2 series indoor unit only.

Ex) ARNU07GSEA2

System(HP) Model

Refrigerant

Product charge kg

CF(Correction Factor) kg Max. Connectable No. of Indoor Units Net Weight kg Dimensions mm (WxHxD) inch

Connecting Pipes

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

456 ARUN40GS2 ARUN50GS2 ARUN60GS2 ARUV40GS2 ARUV50GS2 ARUV60GS2

3.7 3.7 3.7

-0.5 0 0 689

118 118 118

950x1,380x330 950x1,380x330 950x1,380x330

37.4x54.3x13 37.4x54.3x13 37.4x54.3x13

9.52(3/8) 9.52(3/8) 9.52(3/8)

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

ENGLISH

Installation Manual 9

Before Installation

• 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 characteristic 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 encouraged to use it widely to prevent environment pollution.

• When carrying the suspended, unit pass the ropes between legs of base panel under the unit.

• 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.

• Use only accessories and parts which are of the designated specification when installing.

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.

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.

Environment-friendly Alternative Refrigerant R410A

Transporting the Unit

Air outlet grille Intake hole

Corner

Sub line

Handle

Always hold the unit by the corners, as holding it by the side intake holes on the casing may cause them to deform.

40° or less

WARNING

10 Outdoor Unit

Select the Best Location

1. 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.

2. Select installation location considering following conditions to avoid bad condition when additionally performing defrost operation.

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

at a place with a high humidity in winter (near beach, coast, lake, etc). (Ex) Rooftop where sunshine always shines.

• 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:

- Shade position with a narrow space

- Location with much moisture in neighboring floor.

- Location with much humidity around.

- Location where ventilation is good. It is recommended to install the outdoor unit at a place with a lot of sunshine as possible as.

- Location where water gathers since the floor is not even.

3. When installing the outdoor unit in a place that is constantly exposed to a strong wind like a coast or on a high story of a building, secure a normal fan operation by using a duct or a wind shield.

• Install the unit so that its discharge port faces to the wall of the building.

Keep a distance 500mm or more between the unit and the wall surface.

• Supposing the wind direction during the operation season of the air conditioner, install the unit so that the

discharge port is set at right angle to the wind direction.

Turn the air outlet side toward the building's wall,

fence or windbreak screen.

Set the outlet side at a right angle

to the direction of the wind.

Air inlet grille

500

Strong wind

Blown air

ENGLISH

Installation Manual 11

Installation Space

• The following values are the least space for installation.

If any service area is needed for service according to field circumstance, obtain enough service space.

• The unit of values is mm.

■ In case of obstacles on the suction side

1. Stand alone installation

2. Collective installation

100 or

500 or less

100 or

1000 or

150 or

100 or

150 or

500 or less

100 or

150 or

1000 or

[Unit:mm]

1000 or

100 or

200 or

300 or

1000 or more

100 or

500 or less

200 or

1000 or

300 or

[Unit:mm]

12 Outdoor Unit

Installation Space

■ In case of obstacles on the discharge side

1. Stand alone installation

■ In case of obstacles on the suction and the discharge side ➲ Obstacle height of discharge side is higher than the unit

1. Stand alone installation

2. Collective installation

500 or less

1000 or

ore

500 or m

100 or

ore

1000 or m

100 or

ore

1000 or m

L > HL > H

100 or

500 or

ore

500 or less

1000 or

ore

250 or

ore

[Unit:mm]

1000 or

[Unit:mm]

1000 or more

ENGLISH

Installation Manual 13

Installation Space

2. Collective installation

➲ Obstacle height of discharge side is lower than the unit

1. Stand alone installation

100 or more

L > H L > H

100 or more

1000 or

300 or

1000 or

500 or less

L ≤ HL ≤ H

100 or

500 or

500 or less

L ≤ HL ≤ H

100 or more

1250 or more

300 or

1000 or

300 or

[Unit:mm]

1000 or

1500 or

300 or

[Unit:mm]

1500 or

14 Outdoor Unit

Installation Space

Collective / Continuous Installation for roof top use

Space required for collective installation and continuous installation: When installing several units, leave space between each block as shown below considering passage for air and people.

1. One row of stand alone installation

2. Rows of collective installation (2 or more)

• L should be smaller than H

100 or

2000 or

200 or

1000 or

300 or

3000 or

600 or

1500 or

100 or

L ≤ H

[Unit:mm]

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.

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.

ENGLISH

Installation Manual 15

Installation

Foundation for Installation

• Check the strength and level of the installation ground so that the unit will not cause any operating vibration or noise after installation.

• Fix the unit securely by means of the foundation bolts. (Prepare 4sets of M12 foundation bolts, nuts and washers each which are available on the market.)

• It is best to screw in the foundation bolts until their length are 20mm from the foundation surface.

If it is necessary to prevent the unit from falling over, install as shown in the figure.

• Prepare all 4 wires as indicated in the drawing

• Unscrew the top plate at the 4 location indicated A and B

• Put the screws through the nooses and screw them back tight

A : Location of the 2 fixation holes on the front side of the unit B : Location of the 2 fixation holes on the rear side of the unit

C : wires

[Unit:mm]

Foundation bolt executing method

200

Nut

200

Spring washer

Frame

Anti-vibration

materials

Four bolt are required 3 thread ridges

H-Beam

Concrete

base

100

16 Outdoor Unit

Installation

Preparation of Piping

1) Cut the pipes and the cable.

■ Use the accessory piping kit or the pipes purchased locally.

■ Measure the distance between the indoor and the outdoor unit.

■ Cut the pipes a little longer than measured distance.

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

2) Burrs removal

■ Completely remove all burrs from the cut cross section of pipe/tube.

■ Put the end of the copper tube/pipe to downward direction as you remove burrs in order to avoid to let burrs drop in the tubing.

3) Flaring work

■ Carry out flaring work using flaring tool as shown right.

Firmly hold copper tube in a bar(or die) as indicated dimension in the table above.

4) Check

■ Compare the flared work with figure right.

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

and do flaring work again.

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

Pipe "A "

Gas Liquid Gas Liquid

<5.6(19,100) 12.7(1/2) 6.35(1/4)

1.6~1.8 1.1~1.3

(0.63~0.71) (0.43~0.51)

<16.0(54,600) 15.88(5/8) 9.52(3/8)

1.6~1.8 1.5~1.7

(0.63~0.71) (0.59~0.67)

<22.4(76,400) 9.52(3/4) 9.52(3/8)

1.9~2.1 1.5~1.7

(0.75~0.83) (0.59~0.67)

Indoor unit [kW(Btu/h]

Copper

tube

90°

Slanted Uneven Rough

Pipe

Reamer

Point down

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

Inclined

Inside is shining without scratches.

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

Unit : mm(inch)

ENGLISH

Installation Manual 17

Installation

1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120°C).

2. Precautions in high humidity circumstance: This air conditioner has been tested according to the "ISO Conditions with Mist" and confirmed that there is not any default. However, if it is operated for a long time in high humid atmosphere (dew point temperature: more than 23°C), water drops are liable to fall. In this case, add heat insulation material according to the following procedure:

• 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.

Indoor unit

Thermal insulator (accessory)

Fastening band (accessory)

Refrigerant piping

HEAT INSULATION

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.

CAUTION

Always use a charge hose for service port connection. After tightening the cap, check that no refrigerant leaks are

present. When loosening a flare nut, always use two wrenches in

combination, When connecting the piping, always use a spanner and torque wrench in combination to tighten the flare nut.

When connecting a flare nut, coat the flare(inner and outer faces) with oil for R410A(PVE) and hand tighten the nut 3 to 4 turns as the initial tightening.

FLARE SHAPE and FLARE NUT TIGHTENING TORQUE

90°

±2

5°

±2

R=0.4~0.8

Pipe size Tightening Torque(kgf·cm) A(mm) flare shape

9.52 340~420 12.6~13.0

12.7 550~660 15.8~16.2

15.88 630~820 19.0~19.4

Union

18 Outdoor Unit

Refrigerant Piping

■ Connecting the pipes to the outdoor unit

1. Liquid pipe

• Align the center of the pipings and sufficiently tighten

the flare nut with fingers.

• Finally, tighten the flare nut with torque wrench until

the wrench clicks.

- When tightening the flare nut with torque wrench, ensure the direction for tightening follows the arrow on the wrench.

■

Possible direction for field piping

• For the units with capacity more than 42 kBtu/h, the installation piping is connectable in four directions.(refer to figure 1)

• When connecting in a downward direction, knock out the knockout hole of the base pan. (refer to figure 2)

■ Preventing foreign objects from

entering (Figure3)

• Plug the pipe through-holes with putty or insulation material(procured locally)to stop up all gaps,as shown in the figure 3.

• Insects or small animals entering the outdoor unit may cause a short circuit in the electrical box.

2. Gas pipe

• Braze suitable field piping with service valve of gas pipe.

Torque wrench

Wet towel

Gas side piping (Bigger Dia.)

Liquid side piping (Smaller Dia.)

mm inch kgf.m

Ø9.52 3/8 3.4~4.2

Outside diameter Torque

CAUTION

Take care so that there is no thermal damage on the service valves of the outdoor unit. (Especially packing part of service port.) Wrap the service valve with a wet towel when brazing it as shown figure above.

CAUTION

• Make sure that pipe doesn't contact with the compressor terminal cover and comp bolt.

• Always insulate the liquid and gas-side field piping and branch.

Backward

Downward

Forward

Sideways

Knock-out Base pan

Putty or insulating material (produced locally)

Connecting wire

Drain hose

Connection pipe

ENGLISH

Installation Manual 19

Refrigerant Piping

Cautions for Handling Service Valve

How to Use the Shut-Off Valve

CAUTION

Make sure to keep the valve open during operation

• The service valves are closed at shipment from the factory

The names of parts of the service valve are shown in the figure.

• since the side boards may be deformed if only a torque wrench is used when loosening or tightening flare nuts, always lock the shut-off valve with a wrench and then use a torque wrench. Do not place wrenches on the valve cover.

Do not apply force on the valve cover, this may result in a refrigerant leak.

Use hexagonal wrenches 4mm or 6mm

• Opening the valve

1. Place the hexagon wrench on the valve bar and turn counter-clockwise.

2. Stop when the valve bar no longer turns. It is now open.

• Closing the valve

1. Place the hexagon wrench on the valve bar and turn clockwise.

2. Stop when the valve bar no longer turns. It is now closed.

1. Service point

2. Shut-off Valve

3. Filed piping connection

4. Valve cover

1. Spanner

2. Torque wrench

Direction to open

Direction to open

20 Outdoor Unit

Refrigerant Piping

To Outdoor Unit Sealed Piping

A B

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.

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

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

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

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

6. If the diameters of the branch piping of the designated refrigerant piping differs, use a pipe cutter to cut the connecting section and then use an adapter for connecting different diameters to connect the piping.

7. Always observe the restrictions on the refrigerant piping (such as rated length, difference in height, and piping diameter). Failure to do so can result in equipment failure or a decline in heating/cooling performance.

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

9. The Multi V will stop due to an abnormality like excessive or insufficient refrigerant. At such a time, always properly charge the unit. When servicing, always check the notes concerning both the piping length and the amount of additional refrigerant.

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

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

performance, drip of condensate and other such problems.

12. 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.

13. Always blow nitrogen into pipe which is brazed. 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.

Caution

ARBLN01621 ARBLN03321 ARBL054 ARBL057 ARBL1010 ARBLN07121 ARBLN14521 ARBL104 ARBL107 ARBL2010

Y branch

Header

4 branch 7 branch 10 branch

0.99

22.2

1.1

31.8

1.21

34.9

1.35

38.1

1.43

41.3

0.99

28.58

0.99

25.4

0.99

19.05

0.99

15.88

0.8

12.7

0.8

9.52

0.8

6.35

Minimum

thickness [mm]

Outer diameter

[mm]

ENGLISH

Installation Manual 21

Refrigerant Piping

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.

WARNING

Do not use anti-oxidants when brazing the pipe joints. Residue can clog pipes and break equipment.

1 Refrigerant piping 4 Taping 2 Pipe to be brazed 5 Valve 3 Nitrogen 6 Pressure-reducing valve

22 Outdoor Unit

Refrigerant Piping

Selection of Refrigerant Piping

Selection of pipe sizeName

Size of main pipe

Pipe size of between branching sections

Connecting pipe size of indoor unit

Piping partsNo.

Outdoor unit

1st branching section

Branching section

Indoor unit

Main pipe

Branching pipe

Indoor unit

connecting pipe

Outdoor unit capacity type

Liquid pipe Gas pipe

[mm(inch)] [mm(inch)]

4 HP Ø9.52(3/8) Ø15.88(5/8) 5 HP Ø9.52(3/8) Ø15.88(5/8) 6 HP Ø9.52(3/8) Ø19.05(3/4)

Indoor unit capacity[kW(Btu/h)]

Liquid pipe Gas pipe

[mm(inch)] [mm(inch)]

≤ 5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)

< 16.0(54,000) Ø9.52(3/8) Ø15.88(5/8)

Indoor unit capacity[kW(Btu/h)]

Liquid pipe Gas pipe

[mm(inch)] [mm(inch)]

≤ 5.6(19,100) Ø6.35(1/4) Ø12.7(1/2) < 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8) < 22.4(76,400) Ø9.52(3/8) Ø19.05(3/4)

Outdoor unit

Gas pipe

Main pipe

Liquid pipe

Branching

pipe

Indoor unit

ENGLISH

Installation Manual 23

Refrigerant Piping

Allowable Length/Height Difference of Refrigerant Piping

■ Y Branch Method

Example : 5 Indoor Units connected

: Outdoor Unit : 1st branch (Y branch) : Indoor Units

L150m

H 50m

l 40m

➲ Total pipe length = A+B+C+D+a+b+c+d+e ≤ 300m

Longest pipe length Equivalent pipe length A+B+C+D+e ≤ 150m * A+B+C+D+e ≤ 175m Longest pipe length after 1st branch B+C+D+e ≤ 40m Difference in height(Outdoor Unit ↔ Indoor Unit) H ≤ 50m ( 40m : Outdoor Unit is lower than Indoor Units) Difference in height (Indoor Unit ↔ Indoor Unit) h ≤ 15m

• * :

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

24 Outdoor Unit

Refrigerant Piping

■ Header Method

Example : 6 Indoor Units connected

: Outdoor Unit : 1st branch : Indoor Units : Sealed piping

L 150m

H 50m

40m

WARNING

Pipe length after header branching (a~f) It is recommended that difference in length of the pipes connected to the Indoor Units is minimized. Performance difference between Indoor Units may occur.

• * :

Assume equivalent 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

Longest pipe length * Equivalent pipe length A+f ≤ 150m A+f ≤ 175m Longest pipe length after 1st branch f ≤ 40m Difference in height(Outdoor Unit ↔ Indoor Unit) H ≤ 50m (40m : Outdoor Unit is lower)** Difference in height (Indoor Unit ↔ Indoor Unit) h ≤ 15m

➲ Total pipe length = A+a+b+c+d+e+f ≤ 300m

ENGLISH

Installation Manual 25

Refrigerant Piping

■ Combination of Y branch/header method

Example : 5 Indoor Units connected

: Outdoor Unit : 1st branch (Y branch) : Y branch : Indoor Unit : Header : Sealed piping

L 150m

40m

H 50m

Branch pipe can not be used after header

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

➲ Total pipe length = A+B+C+a+b+c+d+e ≤ 300m

Longest pipe length * Equivalent pipe length A+B+b ≤ 150m A+B+b ≤ 175m Longest pipe length after 1st branch B+b ≤ 40m Difference in height(Outdoor Unit ↔ Indoor Unit) H ≤ 50m (40m : Outdoor Unit is lower than Indoor Units)** Difference in height (Indoor Unit ↔ Indoor Unit) h ≤ 15m

Downward Indoor Unit total capacity

[kW(Btu/h)]

≤5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)

<16(54,600) Ø9.52(3/8) Ø15.88(5/8)

<22.4(76,400) Ø9.52(3/8) Ø19.05(3/4)

Liquid pipe [mm(inch)]

Gas pipe

[mm(inch)]

• * :

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.

26 Outdoor Unit

Refrigerant Piping

1. Normal condition

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

Example : 5 HP

Additional charge amount R (kg)

= (Lx x 0.022kg/m) + (Ly x 0.061kg/m) + Correction factor = (12 x 0.022kg/m) + (28 x 0.061kg/m) + 0 = 1.972

Lx : Real total length of liquid pipe Ø6.35(m) Ly : Real total length of liquid pipe Ø9.52(m)

L2 L3 abcd

Ø6.35:5m

Ø6.35:4m

Ø6.35:3m

Ø9.52:3m

Ø9.52:5m

Ø9.52:10m

The Amount of Refrigerant

2. Special condition

In case of the No. of CST TQ/RAC SE/ARTCOOL SF models are over than 50% of the connected indoor units when the total No. of connected indoor units are over than 50% of the max. connectable indoor units.

■ Additional refrigerant charging amount (kg) : = (A x + B x ß) - (AVG x ß)

• A = Total No. of TQ,SE and SF Indoor units, = 0.5

• B = Total No. of except TQ,SE and SF Indoor units, ß = 0.3

• AVG = 50% of Max. No. of connectable Indoor units.

Example)

1) Installation Information

- Outdoor unit : 6HP

- Total indoor units : 6 units (TQ 3 units, SE 2 units, BH 1 unit)

2) Information from PDB

- Max. No. of connectable indoor units : 10 units

- Calculated additional refrigerant amount = 2 kg :

3) Indoor refrigerant charging amount

= (5 units x 0.5+1 unit x 0.3) - (5 units x 0.3) = 1.3 kg :

Revised the total additional charging amount = = 2 kg +1.3 kg

= 3.3 kg

Product Charge(kg)

Additional charge (kg)

Total liquid pipe (m)

Additional refrigerant charge

amount per liquid pipe 1m

(Table 1)

Correction Factor (kg)

(Table 2)

Total amount(kg)

A B

Table 1

Pipe diameter at liquid side (mm)

Additiona

refrigerantl

amount (kg/m)

Ø22.2Ø19.05Ø15.88Ø12.7Ø9.52Ø6.35

0.3540.2660.1730.1180.0610.022

Table 2

PRODUCT CHARGE

-0.5

3.7

Total amount(kg)

AB+C

3.7

ENGLISH

Installation Manual 27

Refrigerant Piping

WARNING

Regulation for refrigerant leakage

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

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

WARNING

Refer to model information since the CF Value of correction factor differs depending on model.

CAUTION

If a negative result is obtained from the calculation, no refrigerant needs to be added.

Total amount of refrigerant in the system

0.44 ( kg / m3)

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

28 Outdoor Unit

Refrigerant Piping

1. Line Distribution

2. Vertical Distribution

Ensure that the branch pipes are attached vertically.

3. The others

Header

1st

Main pipe

Distribution

2nd

3rd

2nd

Main pipe

Distribution

1st

3rd

3rd main pipe distribution

2nd

Distribution Method

ENGLISH

Installation Manual 29

Refrigerant Piping

Branch Pipe Fitting

Y branch

To Outdoor Unit To Branch Piping or Indoor Unit

A B

Facing

upwards

Facing

downwards

Within ± 3° Within ± 3°

Viewed from point A in direction of arrow

Horizontal plane

Within +/- 10°

Header

To outdoor unit To indoor unit

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

• When the number of pipes to be connected is smaller than the number of header branches, install a cap to the unconnected branches.

• The indoor unit having larger capacity must be installed closer to

than smaller one.

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

the connecting section

should be cut with a pipe cutter.

Pipe cutter

30 Outdoor Unit

Refrigerant Piping

• When the number of indoor units to be connected to the branch pipes is less than the number of branch pipes available for connection then cap pipes should be fitted to the surplus branches.

• Fit branch pipe lie in a horizontal plane.

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

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

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

Pinched pipe

Horizontal plane

View from point B in the direction of the arrow

Insulate the header using the insulation material attached to the branch pipe kit as shown in the figure.

Insulator

Insulator of field pipe

Tape

Cap pipe

Insulator for cap pipe

ENGLISH

Installation Manual 31

Refrigerant Piping

1. Y Branch

Selection of Y Branch and Header

Models Gas pipe Liquid pipe

ARBLN01621

ARBLN03321

ARBLN07121

I.D. 15.88

O.D19.05

I.D31.8

I.D. 12.7

I.D22.2

I.D25.4

I.D22.2

I.D19.05

I.D28.58

O.D22.2

I.D28.58

I.D25.4

I.D22.2

O.D19.05

I.D12.7

I.D15.88

O.D19.05

I.D19.05

I.D. 15.88

I.D22.2

I.D15.88

I.D22.2

I.D. 15.88

I.D19.05

I.D12.7

I.D19.05

I.D15.88

I.D12.7

I.D28.58

I.D12.7

I.D6.35

I.D12.7

I.D19.05

O.D12.7

I.D9.52

I.D15.88

I.D9.52

I.D6.35

[unit:mm]

I.D6.35

I.D9.52

I.D6.35

I.D9.52

I.D6.35

I.D9.52

I.D12.7

I.D15.88

O.D12.7

I.D12.7

I.D19.05

I.D6.35

I.D12.7

I.D9.52

I.D34.9

O.D38.1

O.D28.58

I.D38.1

I.D34.9

I.D22.2

I.D28.58

I.D22.2

I.D19.05

ARBLN14521

O.D22.2

I.D19.05

I.D34.9

I.D15.88

I.D12.7

I.D41.3

I.D38.1

2 X

I.D41.3

O.D15.88

For example. Indicated Ø9.52 is the outer diameter(O.D..) of field jointed piping

I.D15.88

I.D22.2

O.D15.88

O.D19.05

I.D9.52

I.D22.2

I.D19.05

O.D12.7

I.D19.05

I.D22.2

I.D12.7

I.D19.05

I.D15.88

I.D12.7

I.D15.88

I.D6.35

I.D9.52

32 Outdoor Unit

Refrigerant Piping

2. Header

I.D Ø15.88

I.D Ø12.7

I.D Ø15.88

I.D Ø12.7

I.D Ø19.05

O.D Ø19.05

I.D Ø15.88

I.D Ø12.7

I.D Ø9.52

I.D Ø6.35

I.D Ø12.7

O.D Ø12.7 I.D Ø9.52

I.D Ø15.88

I.D Ø12.7

I.D Ø15.88

I.D Ø12.7

I.D Ø19.05

O.D Ø19.05

I.D Ø15.88

I.D Ø12.7

I.D Ø9.52

I.D Ø6.35

I.D Ø9.52

I.D Ø6.35

I.D Ø12.7

O.D Ø12.7 I.D Ø9.52

I.D Ø15.88

I.D Ø12.7

I.D Ø28.58

I.D Ø19.05

I.D Ø15.88

O.D Ø28.58

I.D Ø22.2

I.D Ø25.4

I.D Ø9.52

I.D Ø6.35

I.D Ø9.52

I.D Ø12.7

I.D Ø6.35

O.D Ø12.7

I.D Ø9.52

I.D Ø15.88

I.D Ø12.7

I.D Ø28.58

I.D Ø19.05

I.D Ø15.88

O.D Ø28.58

I.D Ø22.2

I.D Ø25.4

I.D Ø9.52

I.D Ø6.35

I.D Ø9.52

I.D Ø12.7

I.D Ø6.35

O.D Ø12.7

I.D Ø9.52

I.D Ø15.88

I.D Ø12.7

I.D Ø28.58

I.D Ø19.05

I.D Ø15.88

O.D Ø28.58

I.D Ø22.2

I.D Ø25.4

I.D Ø9.52I.D Ø6.35

I.D Ø9.52

I.D Ø12.7

I.D Ø6.35

O.D Ø12.7 I.D Ø9.52

I.D Ø15.88

I.D Ø19.05

I.D Ø31.8

I.D Ø38.1

I.D Ø12.7

O.D Ø38.1

I.D Ø34.9

I.D Ø28.58

I.D Ø6.35

I.D Ø9.52

I.D Ø9.52 I.D Ø6.35

I.D Ø15.88

I.D Ø19.05

O.D Ø19.05 I.D Ø15.88

[unit:mm]

4 branch

ARBL054

7 branch

ARBL057

4 branch

ARBL104

7 branch

ARBL107

10 branch ARBL1010

10 branch ARBL2010

Models Gas pipe Liquid pipe

ENGLISH

Installation Manual 33

Refrigerant Piping

Thermal Insulation of Refrigerant Piping

Heat

insulation

material

Outer

covering

Adhesive + Heat - resistant polyethylene foam + Adhesive tape

Indoor Vinyl tape Floor exposed

Water-proof hemp cloth + Bronze asphalt

Outdoor

Water-proof hemp cloth + Zinc plate + Oily paint

Note: When using polyethylene cover as covering material, asphalt roofing shall not be required.

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

• Be sure to fully insulate connecting portion.

Liquid pipe Gas pipe Power lines Finishing tape Insulating material

Bad example

Good example

These parts are not insulated.

B A C

A B C

A B C D E

Communication lines

Liquid pipe

Communication lines

Separation

Gas pipe Power lines Insulating material

A B C D E

Heat insulation material Pipe Outer covering

(Wind the connection part and cutting part of heat insulation material with a finishing tape.)

Power lines

Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with enough thickness heat-resistant polyethylene, so that no gap is observed in the joint between indoor unit and insulating material, and insulating materials themselves. When insulation work is insufficient, there is a possibility of condensation drip, etc. Pay special attention to insulation work to ceiling plenum.

1m1m

G B

Inner wall (concealed)

Floor (fireproofing)

Penetrating portion on fire

limit and boundary wall

Roof pipe shaft

Outer wall Outer wall (exposed)

Penetrations

Sleeve Heat insulating material Lagging Caulking material Band Waterproofing layer Sleeve with edge Lagging material Mortar or other incombustible caulking Incombustible heat insulation material

When filling a gap with mortar, cover the penetration part with steel plate so that the insulation material will not be caved in. For this part, use incombustible materials for both insulation and covering.(Vinyl covering should not be used.)

34 Outdoor Unit

Refrigerant Piping

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.

Leak Test and Vacuum Drying

1. Leak test

Leak test should be m

ade by pressurizing nitrogen gas to 3.8 MPa(38.7kgf/cm2). If the pressure does not drop for 24 hours, the system passes the test. If the pressure drops, check where the nitrogen leaks. For the test method, refer to the following figure. (Make a test with the service valves closed. Be also sure to pressurize liquid pipe, gas pipe and high/low pressure common pipe) The test result can be judged good if the pressure has not be reduced after leaving for about one day after completion of nitrogen gas pressurization. During this test, set DIP switch as Vacuum Mode.

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/cm2(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.

Nitrogen gas cylinder

Liquide pipe

Gas pipe

ENGLISH

Installation Manual 35

Refrigerant Piping

2. Vacuum

Vacuum drying should be made from the service port provided on the outdoor unit’s service valve to the vacuum pump commonly used for liquid pipe, gas pipe. Vaccum of the pipe and the indoor units should be made from the port of the outdoor unit's service valve 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 system 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 nitrogen 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.

WARNING

• If the primary charging is not performed after vacuum, wet air may go into the outdoor unit. If air is mixed with the refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.

• Charging of refrigerant while the compressor is working is prohibited. Otherwise, liquid may go into the compressor. It may cause faults of the compressor.

• Use a gravimeter accurate to 0.1kg.

• If other refrigerants are mixed in the original refrigerant, a refrigerant cycle may cause malfunction or damage.

• Add accurate refrigerant quantity via calculation. Too much or too little refrigerant may cause problems

• Repeated on and off of the indoor units without charging refrigerant may cause faults of EEV.

• 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.

Vacuum pump

Liquide pipe

Gas pipe

36 Outdoor Unit

Refrigerant Piping

CAUTION

Never charge the refrigerant with service valves closed and unit stopped. If charging is carried out with service valves closed and unit stopped, the compressor will be damaged when unit starts to run, and the unit will display ch26 error. If trying to keep running under this condition, compressor will be broken.

3. Refrigerant charging

Follow following procedure to charge the refrigerant.

1. Open all service valves

2. Run the unit with cooling mode

3. Charging the refrigerant to gas service valve during operation.

Charging during cooling operation

Refrigerant cylinder

Open Open

Liquide pipe

Gas pipe

ENGLISH

Installation Manual 37

Electrical Wiring

CAUTION

Be sure to connect the Outdoor Unit to earth. Do not connect earth line to any gas pipe, water pipe, lightening rod or telephone earth line. If earth is incomplete, it may cause an electric shock.

WARNING

Be sure to have authorized electrical engineers do the electric work using special circuits in accordance with regulations and this installation manual. If power supply circuit has a lack of capacity or electric work deficiency, it may cause an electric shock or fire.

1. Caution

1) Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company.

2) Install the Outdoor Unit communication line away from the power source wiring so that it is not affected by electric noise from the power source. (Do not run it through the same conduit.)

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

4) Give some allowance to wiring for electrical part box of Indoor and Outdoor Units, because the box is sometimes removed at the time of service work.

5) Never connect the main power source to terminal block of communication line. If connected, electrical parts will be burnt out.

6) Use 2-core shield cable for communication line.(O mark in the figure below) If communication lines of different systems are wired with the same multiplecore cable, the resultant poor transmitting and receiving will cause erroneous operations. ( mark in the figure below)

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

Electrical Wiring

38 Outdoor Unit

Electrical Wiring

Remote control

Indoor

Unit

Outdoor Unit

Indoor

Unit

Remote control

Indoor

Unit

Indoor

Unit

Remote control

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

2-Core Shield Cable Multi-Core Cable

CAUTION

• This product have reversed phase protection detector that only works when the power is turned on. If there exists black out or the power goes on and off which the product is operating, attach a reversed phase protection circuit locally. running the product in reversed phase may break the compressor and other parts.

• Use the 2-core shield cables for communication 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 unit’s lifespan will be reduced.

• Introducing with a missing N-phase or with a mistaken N-phase will break the equipment.

ENGLISH

Installation Manual 39

Electrical Wiring

2. Communication and Power Lines

1) Communication cable

• Types : shielding wire CVVS or CPEVS

• Cross section : over 1.25mm

• Insulation material : PVC

• Maximum allowable temperature: 60°C

• Maximum allowable line length: 300m

2) Remote control cable

• Types : 3-core cable

3) Simple central control cable

• Types : 4-core cable (Shielding wire)

• Cross section : over 0.75mm

• Insulation material : PVC

4) Separation of communication and power lines

• If communication and power lines are run alongside each other then there is a strong likelihood of operational faults developing due to interference in the signal wiring caused by electrostatic and electromagnetic coupling. The tables below indicates our recommendation as to appropriate spacing of communication and power lines where these are to be run side by side

Note:

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

Current capacity of power line Spacing

10A 300mm 50A 500mm

100A 1000mm

Exceed 100A 1500mm

100V or more

CAUTION

• 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.

• Use a power wire pipe for the power wiring.

40 Outdoor Unit

Electrical Wiring

Outdoor unit (1Ø, 220~240V, 50Hz / 1Ø, 220V, 60Hz), Indoor unit (1Ø, 220V, 50Hz/60Hz)

1. Separate power supply lines for the indoor units from outdoor unit.

2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding 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 regulations 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 connections 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.

Wiring of Main Power Supply and Equipment Capacity

ENGLISH

Installation Manual 41

Electrical Wiring

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.

◆ Precautions when laying power wiring

◆ How to connect wiring

1. Connect power supply wire to terminal block of control case using clamps on the supporter and control case as shown figure right.

2. Connect communication wire to main PCB terminal block using clamps on the supporter and main PCB case as shown figure right.

Round pressure terminal

Power wire

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

42 Outdoor Unit

Electrical Wiring

Example Connection of Communication Cable

1. 50Hz

■ 1 Outdoor Unit - 1Ø, 220~240V

3 4 34

: Single phase of power supply line(L, N) : Communication line (3 line): Wired remote control : Communication line (2 shield line):

Between Indoor Unit and Outdoor Unit

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

Between Indoor and Outdoor unit

IDUSODU DRY1 DRY2 GND

INTERNET

12V

BABA

1 Phase 2 Wires

Power supply

50Hz 220~240V

Power supply

1 Phase 50Hz

220~240V

Power supply switch (Switch fuse : ELCB)

Power supply switch (Switch fuse)

(Main Switch)

Pull Box(Installer Option)

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.

ENGLISH

Installation Manual 43

Electrical Wiring

2. 60Hz

■ 1 Outdoor Unit - 1Ø, 220V

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

Between Indoor and Outdoor unit

IDUSODU DRY1 DRY2 GND

INTERNET

12V

BABA

1 Phase 2 Wires

Power supply

60Hz 220~240V

Power supply 1 Phase 60Hz

220V

Power supply switch (Switch fuse : ELCB)

Power supply switch (Switch fuse)

(Main Switch)

34 34 34

Pull Box(Installer Option)

: Single phase of power supply line(L, N) : Communication line (3 line): Wired remote control : Communication line (2 shield line):

Between Indoor Unit and Outdoor Unit

WARNING

• 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.

Electrical Wiring

44 Outdoor Unit

■ Example Connection of Communication Cable

[BUS type]

• Connection of communication cable must be installed like below figure between indoor unit to outdoor unit.

[STAR type]

• Abnormal operation can be caused by communication defect, when connection of communication cable is installed like below figure(STAR type).

Electrical Wiring

ENGLISH

Installation Manual 45

■ Location of setting Switch

Main PCB

SW01B

(DIP S/W)

SW02B

(DIP S/W)

7 - Segment SW02V

Auto addressing

SW01V Data confirm

DIP Switch Setting

■ Checking according to dip switch setting

1. You can check the setting values of the 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

■ Checking the setting of the unit

The number is sequentially appeared at the 7 segment in 5 seconds after applying the power. This number represents the setting condition. & model code ➔ total capacity ➔ 2 ➔ 25 ➔ model type

1 ~255 : model code 4~6HP : HP numbers No display : cooling only 2 : heat pump 25 : normal 120 : Model type(Mini, 1Ø 220V) 121 : Model type(Mini, 3Ø 380V)

Example) 5HP, R410A

121 ➔ 5 ➔ 2 ➔ 25 ➔ 120

CAUTION

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

Model Code

Model Code Unit (HP) Ref.

120 4 121 5 R410A 122 6

Electrical Wiring

46 Outdoor Unit

■ Setting the DIP switch

• Set the dip switch with the power turned off. If y ou change the setting when the power is on, the changed

setting is not applied immediately. The changed setting is applied at the moment that the power is on.

• Instant indoor unit checking, data display mode, and forced oil collecting operation are used when theunits

are running. If you don't have to use those functions after using them, restore the dip switch setting.

1. Settings of outdoor unit

Standard

Short Pipe

Length

Long Pipe Length

Refrigerant Auto

Charging

Refrigerant

Checking

SW01B Setting

1234567ON1234567

1234567 891011121314

1234567ON1234567

1234567 891011121314

1234567ON1234567

1234567 891011121314

1234567ON1234567

1234567 891011121314

1234567ON1234567

1234567 891011121314

RemarksSW02B SettingFunction SW01B Setting RemarksSW02B SettingFunction

Power reset is

necessary

Factory Setting

Power reset is

necessary

-Cooling T arget Pressure : Standard+39

-Heating T arget Pressure

: Standard-131

Power reset is

necessary

-Cooling T arget Pressure : Standard-39

-Heating T arget Pressure

: Standard+131

Dip SW setting

+ Black button

(SW01V)

Dip SW setting

+ Black button

(SW01V)

Cool/Heat

Selector

1234567ON1234567

1234567 891011121314

* In long piping mode, power consumption will be increased.

Power reset is necessary

Optional device

Electrical Wiring

ENGLISH

Installation Manual 47

Snow

Note: Oil collecting operation is default function which operates after every six hours.

• To enable forced operation of this function change the dip switch setting. And after using, make sure to restore the dip switch setting.

Forced

Defrosting

Night Silent

Operation

Pump Down

Pump Out

Forced Oil Return

Vacuum Mode

SW01B Setting RemarksSW02B SettingFunction SW01B Setting RemarksSW02B SettingFunction

1234567ON1234567

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

1234567ON1234567

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

1234567ON1234567

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

1234567ON1234567

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

1234567ON1234567

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

1234567ON1234567

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

1234567ON1234567

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

Used when snow piles up

On the ODU Fan.

Fan operates periodically.

Accelerates defrost

operation

Power reset is necessary

Fan RPM down

on night time

Power reset is necessary

All the refrigerant flows

back into the ODU

Power reset is necessary

Refrigerant from the

broken ODU flows into

the remaining units

Refer Service manual

Dip switch +

Black button(SW01V)

During Vacuuming,

Valves & EEV should

be opened

Refer Service manual

Electrical Wiring

48 Outdoor Unit

Automatic Addressing

SW01B

(DIP S/W)

SW02B

(DIP S/W)

7 - Segment SW02V

Auto addressing

SW01V Data confirm

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

1) Wait for 3 minutes after applying power supply (outdoor unit, indoor unit).

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

3) A "88" is indicated on 7-segment LED of the outdoor unit PCB.

4) For completing addressing, 2~7 minutes are required depending on numbers of indoor unit connection set.

5) Numbers of indoor unit connection set whose addressing is completed are indicated for 30seconds 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 connection 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.

Electrical Wiring

ENGLISH

Installation Manual 49

◆ The Procedure of Automatic Addressing

• Auto addressing setting end Numbers of indoor unit connection set whose addressing is completed are indicated for 30seconds on 7-segment LED after completing setting

Indoor address number is displayed on wired remote control or indoor unit display window. It is not an error message, will disappeared when on/off button is pressed on remote control ex) Display of 01, 02, ..., 15 means connection of 15 indoor units and auto addressing is completed normally.

Auto addressing start

Waiting 3 minutes

Power On

Press SW02V for 5 sec.

7-segment LED = 88

Waiting about 2~7 minutes

7-segment LED

YES

NO Check the connections

of communication line

= 88

Electrical Wiring

50 Outdoor Unit

■ Group Number setting for Indoor Units

Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off. The communication lines connected to INTERNET terminal should be connected to central control of Outdoor

unti with care for their polarity( A → A, B → B ) Turn the whole system on. Set the group and Indoor Unit number with a wired remote control. To control several sets of Indoor Units into a group, set the group ID from 0 to F for this purpose.

Terminal block on the main PCB

SODU IDU INTERNET DRY1 DRY2

B(D) A(C)

GND 12V

Outdoor Units

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)

Group Number Setting

Electrical Wiring

ENGLISH

Installation Manual 51

■ Using Cool/Heat Selector 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.

• Maximum communication line length for dry contact : 200m.

Mode Change

Push Button

Heating

Outdoor Unit

Fan

Cooling

Cool/Heat Selector Installation and Connection(Heat pump only)

■ Without Cool/Heat Selector Installation and Connection

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

Connect signal terminal block as below figure and description.

- How to set mode without Cool/Heat Selector

• Cooling Mode Setting

➀➔GND Connection ➁➔Off (Open)

• Heating Mode Setting

➀➔ GND Connection ➁➔GND Connection

• Fan Mode Setting

➀➔ Off (Open) ➁➔GND Connection

GND

Test Run

52 Outdoor Unit

Test Run

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

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)

Checks before Test Run

Test Run

ENGLISH

Installation Manual 53

The phenomena from master component failure

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

Compressor

Outdoor

fan

Outdoor

EEV

Not operating

Stop during running

Abnormal noise during running

High pressure error at cooling

Heating failure, frequent defrosting

No operating sound at applying power

Heating failure, frozen outdoor heat exchanger part

Low pressure error or discharge temperature error

Motor insulation broken

Strainer clogged Oil leakage Motor insulation failure

U-V-W misconnection

Motor failure, bad ventilation around outdoor heat exchanger

Bad connector contact

Coil failure

EEV clogged

Check resistance between terminals and chassis

Change strainer Check oil amount after opening oil port Check resistance between terminals and

chassis Check compressor U-V-W connection

Check the outdoor fan operation after being turned the outdoor units off for some time. Remove obstacles around the outdoor units

Check connector

Check resistance between terminals

Service necessary

Component Phenomenon Cause Check method and Trouble shooting

How to cope with Test Run Abnormality

Caution for Assembling Outdoor Panels after Test Run

When assemble the outdoor panels after test run, make sure that screws of top panel are assembled as shown figure. If screws are not assembled, it allows rain come into control box causing defect of unit.

Test Run

54 Outdoor Unit

Sensor checking function judges whether the current temperature of indoor and outdoor unit sensors is right or not. It checks 3 indoor temperature sensors, 9 outdoor temperature sensors, 2 outdoor pressure sensors.

It is used for judging sensor abnormality.

Note 2)

Note 1)

Sensor Checking Function

Start

Main PCB SW01S

Main PCB SW01B SW02B

Wait for 3 min. after power

reset

Set the dip S/W according to the function Sensor Checking ➠ Refrigerant Auto Charging : 1,2,7 ON Sensor Checking ➠ Refrigerant Checking : 1,2,7,14 ON

Note

1. Sensor checking function is used with Refrigerant Checking and Refrigerant Auto Charging.

2. Check abnormal sensor

It is displayed at the LED on the main PCB at each step.

4. Refer to the next page for sensor error code part

Main PCB SW01V

Main pcb LED

Main PCB SW01V

Would you perform

the Sensor

checking?

Yes

Don’t Perform Sensor Checking No

Note 3)

Press the black button for 2 sec. on main PCB.

Indoor/Outdoor units operate with air circulation mode

Judging sensor

Yes

normality

Note 4)

Error Display

Press the black button on the main PCB for 2 sec.

Press the black button for 2 sec. after turning off all of dip S/W.

Completed.

Refrigerant Auto Charging

Press the black button until '508' is displayed

Refrigerant

Auto Charging

Refrigerant Checking

Press the black button until '608' is displayed.

Refrigerant

Checking

Caution

1. Confirm auto addressing has been performed (Check installed number of IDU).

2. The error can be displayed even if the sensor is normal according to installation and temperature condition. If error occurs, check the sensor and judge abnormality.

Test Run

ENGLISH

Installation Manual 55

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 outdoor unit.

Indoor sensor error :

319

Outdoor sensor error :

309

Displaying error content

■ Indoor unit error display

1. 1

and 2nd number represents indoor unit number.

Indoor unit number follows auto addressing number.

2. Last number represents sensor.

❈ Indoor unit number follows Auto addressing number.

■ Displaying outdoor unit error

1. 1

and 2nd number represents error content(code).

2. Last number represents outdoor unit number.

ex) Indoor unit No. 2 pipe inlet temperature sensor

error

ex) Outdoor unit liquid pipe temperature

sensor error

1 Outdoor Air Temperature 2 Heat Exchanger 1 3 Inverter Compressor Discharge Temperature 4 Suction Temperature 5 Liquid Pipe Temperature 6 SC pipe in 7 SC pipe out 8 High Pressure Sensor 9 Low Pressure Sensor

ex) Indoor unit No.2 pipe inlet temperature sensor error and outdoor unitsuction temperature sensor error

Caution

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

2. IDU in which error occurred operates fan mode.

1 Pipe inlet temperature sensor 2 Pipe outlet temperature sensor 3 Air temperature sensor

Test Run

56 Outdoor Unit

Refrigerant Auto Charging Function

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.

Main PCB SW01S

Main PCB SW01B SW02B

Main PCB SW01V

Start

Wait for 3 min. after power reset

Set the DIP swtich. Refrigerant Auto Changing : 1,2,7 ON

Press the black button on main PCB. ( Press until ‘508’ is displayed )

Press the black button on main PCB.

IDU runs with cooling mode In designated order.

Is it necessary to

charge refrigerant?

IDU and ODU are turned off when Auto Charging is completed. Close the valve.

Press the black button

Yes

Note

After installing the refrigerant charging device

as shown below in figure, open the valve.

In case air temperature is out of guaranteed temperature,

it may end without performing auto charging.

3. Refrigerant auto charging may over without using capillary assembly by sudden inflow of liquid state refrigerant.

Refrigerant Charging Time may change according to the

charging amount. (Refrigerant Charging Time : about 3 min./kg)

Note 1)

Press the black button

Refrigerant Auto Charging Process

Note 2)

Note 3)

Press the black button for 2 sec. after turning off all of DIP swtich.

Completed.

Test Run

ENGLISH

Installation Manual 57

CAUTION

1. Guaranteed temperature range (Error will occur if temperature is out of range) IDU : 20~32°C ODU : 0~43°C

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.

■ Error contents about auto refrigerant charging function

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

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

3. : Judging rapid refrigerant inflow ( In case the liquid refrigerant flows in because of not using designated Capillary Assembly)

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

Charging port

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

Test Run

58 Outdoor Unit

This function charges appropriate amount of refrigerant automatically through cycle operation. This function judges refrigerant leakage and overcharging.

Refrigerant Checking Function

Main PCB SW01S

Main PCB SW01B SW02B

Main PCB SW01V

Start

Wait for 3 min. after power reset

Set the Dip S/W. Refrigerant Checking : 1,2,7,14 ON

Press the black button on main PCB. ( Press until ‘608’ is displayed )

Press the black button on main PCB

IDU runs with cooling mode in order.

Judging

Refrigerant

Amount

Excess of

Refrigerant

Scarcity of

Refrigerant

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.

Impossible

To Judge

IDU, ODU are turned off

Main

Press the black button on main PCB

PCB SW01V

Press the black button for 2 sec. after turning off all of dip S/W.

Completed

Note 2)

Note 1)

Test Run

ENGLISH

Installation Manual 59

[ Error contents about auto refrigerant charging function ]

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

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

How to cope with Result of Refrigerant Checking

1. If the temperature is not in guaranteed Temperature range, the system will not execute Refrigerant checking and the system will be OFF.

2. Excess of Refrigerant(619)

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

3. Scarcity of Refrigerant(629)

Charge the refrigerant by using Refrigerant Auto Charging Function.

4. Impossible to Judge(639)

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

CAUTION

1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range) IDU : 20~32°C ODU : 10~38°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.

Test Run

60 Outdoor Unit

Night Silent Operation

In cooling mode, this function makes the ODU fan operate at low RPM to reduce the fan noise of ODU at night which has low cooling load.

Max. RPM setting method

DIP switch No.12+14 ON

ODU SW01B

Main PCB power reset

Note 1)

Setting the Fan Max. RPM

ODU SW01S

SW01V SW02V

Setting complete

Caution

1. Request installer to set the function during installation.

2. In case the function is not used, set the DIP switch OFF and reset the power.

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

[Note]

1. Select appropriate RPM referencing noise table.

Step

1 2 3

1 time 2 times 3 times

Setting

Red buttonBlack button

1 time 1 time 1 time

Fan Max

RPM

420 370 320

Judgment

(hr)

8 8 8

Operation

(hr)

9 9 9

Test Run

ENGLISH

Installation Manual 61

Error Indicator

• This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.

• Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of outdoor unit control board as shown in the table.

• If more than two troubles occur simultaneously, lower number of error code is first displayed.

• After error occurrence, if error is released, error LED is also released simultaneously.

Error Display

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

Self-Diagnosis Function

Display Title Cause of Error

0102-

03-

04-

05-

06-

07-

09-

10-

11-

211

221

231

241

251

261

271

281

291

Air temperature sensor of indoor unit Inlet pipe temperature sensor of indoor unit Communication error : wired

remote controller ↔ indoor unit Drain pump Communication error : outdoor

unit ↔ indoor unit Outlet pipe temperature sensor of

indoor unit Different operation mode

Indoor EEPROM Error

Poor fan motor operation Communication error: indoor unit

→ main PCB of outdoor. Outdoor Unit Inverter Compressor

IPM Fault Inverter Board Input Over

Current(RMS) of Outdoor Unit Outdoor Unit Inverter Compressor

DC link Low Voltage Outdoor Unit High Pressure

Switch Outdoor Unit Input Voltage High/

Low Voltage Outdoor Unit Inverter Compressor

Start Failure PSC/PFC Fault error

Outdoor Unit Inverter DC link High Voltage

Outdoor Unit Inverter Compressor Over Current

Air temperature sensor of indoor unit is open or short Inlet pipe temperature sensor of indoor unit is open or short Failing to receive wired remote controller signal in

indoor unit PCB Malfunction of drain pump Failing to receive outdoor unit signal in indoor unit PCB

Outlet pipe temperature sensor of indoor unit is open or short

Operation mode between indoor unit and outdoor unit is different

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

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

PCB damage

Outdoor Unit Inverter Compressor Drive IPM Fault

Outdoor Unit Inverter Board Input Current excess (RMS)

DC charging is not performed at outdoor unit after starting relay turn on.

System is turned off by outdoor unit high pressure switch.

Outdoor Unit input voltage is out of range.

The First Start Failure by Outdoor Unit Inverter Compressor Abnormality

When over current flows instantly at PSC/PFC

System is turned off by outdoor unit DC Voltage Over Charging

Outdoor Unit Inverter Compressor Fault OR Drive Fault

Indoor unit related error

Outdoor unit related error

Test Run

62 Outdoor Unit

System is turned off by outdoor unit Inverter Compressor High Discharge Temperature

System is turned off by excessive increase of high pressure of outdoor unit

System is turned off by excessive decrease of low pressure of outdoor unit

Pressure ratio is under limit Failing to communication between inverter Micom and

converter Micom Outdoor Unit Inverter Compressor CT Sensor open or

short Outdoor Unit Inverter Compressor Discharge

Temperature Sensor open or short Outdoor Unit Low Pressure Sensor open or short

Outdoor Unit High Pressure Sensor open or short

Outdoor Unit Air Temperature Sensor open or short

Outdoor Unit Heat Exchanger Temperature Sensor open or short

Outdoor Unit Suction Temperature Sensor open or short

Omitting connection of Outdoor unit

Excessive connection of indoor units compared to capacity of outdoor unit

Failing to receive inverter signal at main PCB of Outdoor Unit

Failing to receive indoor unit signal at main PCB of outdoor Unit.

Reverse connection or omitting connection of R, S, T power of Outdoor unit

Check EEPROM checksum error when resetting power When Heat sink temperature is above setting value When the temperature sensor value is too high

Fan operation fail at starting or during operation Instant Over Current(Peak) of Outdoor Unit PFC

Communication Fail Between Outdoor Unit Fan MICOM and EEPROM or omitting EEPROM

Outdoor Unit Inverter Compressor High Discharge Temperature

High Pressure of Outdoor Unit

Low Pressure of Outdoor Unit

Low pressure ratio PFC communication error :

Inv. Micom ↔ Convertor Micom Outdoor Unit Inverter Compressor

CT Sensor Fault Outdoor Unit Inverter Compressor

Discharge Temperature Sensor Fault Outdoor Unit Low Pressure

Sensor Fault Outdoor Unit High Pressure

Sensor Fault Outdoor Unit Air Temperature

Sensor Fault Outdoor unit Heat Exchanger

Temperature Sensor Fault Outdoor Unit Suction Temperature

Sensor Fault Omitting connection of R power of

Outdoor unit → CH 50 ❈ Note

Omitting connection of S power of Outdoor unit

→

CH 23

Omitting connection of T power of Outdoor units →Main PCB power OFF

Excessive capacity of indoor units

Communication error : inverter PCB → Main PCB

Communication error : indoor unit → main PCB of outdoor unit

Reverse connection of R, S, T power of Outdoor unit

Inverter PCB EEPROM error Heat sink temperature high error Heat sink temperature sensor

error Fan lock Instant Over Current(Peak) of

Outdoor Unit PFC Outdoor Unit Main PCB EEPROM

Error

Outdoor Unit Liquid pipe Temperature Sensor Error

Outdoor Unit Subcooling Inlet Temperature Sensor Error

Outdoor Unit Subcooling Outlet Temperature Sensor Error

Failure of operation mode conversion at Outdoor Unit

Liquid pipe temperature sensor of outdoor unit is open or short

Outdoor Unit Subcooling Inlet Temperature Sensor open or short

Outdoor Unit Subcooling Outlet Temperature Sensor open or short

Pressure unbalance between outdoor units

Display Title Cause of Error

321

341

351 361

401

391

411

421

431

441

451

461

511

501

521

531

541 601

621 651 671 731

861

11 3 1

11 4 1

11 5 1

15 1 1

Outdoor unit related error

Caution For Refrigerant Leak

ENGLISH

Installation Manual 63

The installer and system specialist shall secure safety against leakage according to local regulations or standards. The following standards may be applicable if local regulations are not available.

Though the R410A refrigerant is harmless and incombustible itself , the room to equip the air conditioner should be large enough to such an extent that the refrigerant gas will not exceed the limiting concentration even if the refrigerant gas leaks in the room

■ Limiting concentration

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

■ Calculate amount of all the replenished refrigerant (kg) per each refrigerant system.

■ Calculate minimum room capacity

Calculate room capacity by regarding a portion as one room or the smaller room. (1) Without partition

(2) With partition and with opening which serve as

passage of air to adjoining room

Caution for Refrigerant Leak

Introduction

Checking procedure of limiting concentration

Limiting concentration is the limit of Freon gas concentration where immediate measures can be taken without hurting human body when refrigerant leaks in the air. The limiting concentration shall be described in the unit of kg/m

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

Limiting concentration: 0.44kg/m

(R410A)

Outdoor unit

(No.1 system)

Indoor unit

Flow of refrigerant

Room where refrigerant leaks (Refrigerant of the whole No.1 system flows out.)

Amount of replenished refrigerant per one outdoor unit system

Amount of replenished refrigerant at factory shipment

Indoor unit

Amount of additional

replenished refrigerant

Amount of additionally replenished refrigerant depending on piping length or piping diameter at customer

Outdoor unit

Total amount of replenished

refrigerant in refrigerant facility (kg)

Note : In case one refrigerant facility is

divided into 2 or more refrigerant systems and each system is independent, amount of replenished refrigerant of each system shall be adopted.

Outdoor unit

Indoor unit

Opening

Partition

In the case of opening without door , or 0.15 % or more openings (to floor space) both above and below door)

Caution For Refrigerant Leak

64 Outdoor Unit

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

■ Calculate refrigerant concentration

■ 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.

Pay special attention to the place, such as a basement, etc. where refrigerant can be present, since refrigerant is heavier than air.

Outdoor unit

Indoor unit

Smallest room

Total amount of replenished refrigerant in refrigerant facility (kg)

Capacity of smallest room where indoor unit is installed (m

)

Refrigerant concentration

≤

(R410A)

(kg/m

In case the result of calculation exceeds the limiting concentration, perform the

)

same calculations by shifting to the second smallest, and the third smallest rooms until at last the result is below the limiting concentration.

Countermeasure 2

Gas leak alarm Mechanical ventilator

Indoor unit

Countermeasure 1

Opening effective to ventilation

Installation Guide at the Seaside

ENGLISH

Installation Manual 65

Installation Guide at the Seaside

Sea wind Sea wind

CAUTION

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 malfunction or inefficient performance.

3. If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea wind. Otherwise it needs additional anticorrosion treatment on the heat exchanger.

Selecting the location(Outdoor Unit)

1) If the outdoor unit is to be installed close to the seaside, direct exposure to the sea wind should be avoided. Install the outdoor unit on the opposite side of the sea wind direction.

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

Windbreak

Sea wind

• It should be strong enough like concrete to prevent the sea wind from the sea.

• The height and width should be more than 150% of the outdoor unit.

• It should be keep more than 70 cm of space between outdoor unit and the windbreak for easy air flow.

3) Select a well-drained place.

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

66 Outdoor Unit

The below Installation guide is limited applicable only for model

ARUN60GS2

Installation Guide for EN 61000-3-12:2005

This equipment complies with IEC 61000-3-12 provided that the short-circuit power Ssc is greater than or equal to 1032 kVA at the interface point between the user's supply and the public system. It is the responsibility of the installer or user of the equipment to ensure, by consultation with the distribution network operator if necessary, that the equipment is connected only to a supply with a short-circuit power Ssc greater than or equal to 1032 kVA."

The below Installation guide is limited applicable only for model

ARUN50GS2

Installation Guide for EN 61000-3-12:2005

This equipment complies with IEC 61000-3-12 provided that the short-circuit power Ssc is greater than or equal to 964 kVA at the interface point between the user's supply and the public system. It is the responsibility of the installer or user of the equipment to ensure, by consultation with the distribution network operator if necessary, that the equipment is connected only to a supply with a short-circuit power Ssc greater than or equal to 964 kVA."

The below Installation guide is limited applicable only for model

ARUN40GS2

Installation Guide for EN 61000-3-12:2005

This equipment complies with IEC 61000-3-12 provided that the short-circuit power Ssc is greater than or equal to 847 kVA at the interface point between the user's supply and the public system. It is the responsibility of the installer or user of the equipment to ensure, by consultation with the distribution network operator if necessary, that the equipment is connected only to a supply with a short-circuit power Ssc greater than or equal to 847 kVA."

P/No.: 3828A24002Y

Printed in Korea

After reading this manual, keep it in a place easily accessible to the user for future reference.

LG ARUN40GS2 INSTALLATION INSTRUCTIONS

Specifications and Main Features

Frequently Asked Questions

User Manual