LG ARUN100LN3 INSTALLATION MANUAL

INSTALLATION MANUAL

AIR CONDITIONER

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

• Installation work must be performed in accordance with the national
wiring standards by authorized personnel only.

• Please retain this installation manual for future reference after reading
it thoroughly.your set and retain it for future reference.

P/NO : MFL67221402

www.lg.com

MODELS : ARUN Series
ARUV Series

ARUN/ARUV Series Outdoor unit Installation Manual

TABLE OF CONTENTS

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

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

Outdoor units Information....................................................................................................8

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

Select the Best Location ....................................................................................................14

Installation Space................................................................................................................15

Lifting method .....................................................................................................................17

Installation ...........................................................................................................................18

Refrigerant piping installation ...........................................................................................23

Pipe connections between indoor and outdoor unit.......................................................27

Electrical Wiring ..................................................................................................................53

Test Run ...............................................................................................................................85

New Function ....................................................................................................................111

Caution For Refrigerant Leak...........................................................................................120

Installation guide at the seaside......................................................................................122

2 Outdoor Unit2 Outdoor Unit

Safety Precautions

Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions
must be followed.
n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is

classified by the following indications.

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

This symbol indicates the possibility of death or serious injury.

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

Be sure not to do.

Be sure to follow the instruction.

n Installation

Have all electric work done by a licensed
electrician according to "Electric Facility
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.

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.

Installation Manual 3

Safety Precautions

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.

Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen
and Do not use Flammable gases. Otherwise, it may cause fire or explosion.

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

■ Operation
Do not damage or use an unspecified power cord.

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

Use a dedicated outlet for this appliance.

• There is risk of fire or electrical shock.

Be cautious that water could not enter the product.

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

Do not touch the power switch with wet hands.

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

When installing and moving the air 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.

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

• This could result in personal injury and product damage.

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

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

■ 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.

4 Outdoor Unit4 Outdoor Unit

Safety Precautions

Keep level even when installing the product.

• To avoid vibration or water leakage.

Do not install the unit where combustible
gas may leak.

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

Use power cables of sufficient current
carrying capacity and rating.

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

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

• There is risk of damage or loss of property.

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

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

When installting the unit in a hospital,
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.

n Operation

Do not use the air conditioner in special
environments.

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

Do not block the inlet or outlet.

• It may cause failure of appliance or accident.

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

• Inadequate connection and fastening may
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.

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

• A bad connection may cause water leakage.

Installation Manual 5

6 Outdoor Unit6 Outdoor Unit

Safety Precautions

Safely dispose of the packing materials.

•

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

•

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

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

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

Be very careful about product transportation.

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

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 Process

Installation Process

• 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.)

Installation Manual 7

Determination of division work

Indicate clearly who will be responsible for switch setting.

Preparation of contract drawings

Sleeve and insert work

Installation of indoor unit

Refrigerant piping work

Drain pipe work

Duct work

Heat insulation work

Electrical work

(connection circuits and drive circuits)

Airtight test

Vacuum drying

Additional charge of refrigerant

Fit facing panels

Automatic addressing of indoor unit

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

Take account of gradient
of drain piping

Check model name to make
sure the fitting is made correctly

Special attention to dryness,
cleanness and tightness

Adjust to downward gradient

Make sure airflow is sufficient

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

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

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

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

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

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

Refer to automatic addressing flowchart
Preheat the crank case with the electrical heater for more than 6 hours.

Outdoor unit foundation work

Installation of outdoor unit

2

) there must be no drop in pressure.

The foundation must be level even

Avoid short circuits and ensure
sufficient space is allowed for service

Test run adjustment

Transfer to customer with explanation

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

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

Outdoor units Information

Outdoor units Information

n Heat pump

n Combination Ration(50~200%)

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

If you want to connect more than 130% combination, please contact us and discuss the
requirement like below.

1) If the operation of indoor unit is more than 130%, the airflow is operated as low in the all
indoor units.

2) The number of () means the number of Max. connectable indoor units, when the connected
capacity of indoor units is in the table above.

Outdoor Number Connection Capacity
Single outdoor units 200%
Double outdoor units 160%

Triple outdoor units 130%

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

8 Outdoor Unit

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

1 Outdoor unit

8 10 12

ARUN80LN3 ARUN100LN3 ARUN120LN3
ARUN80LN3 ARUN100LN3 ARUN120LN3

5.0 6.4 6.4
13(20) 16(25) 20(30)

190 x 1 240 x 1 240 x 1

418 x 1 529 x 1 529 x 1
(920 x 1,680 x 760) x 1 (920 x 1,680 x 760) x 1 (920 x 1,680 x 760) x 1
(36.2 x 66.1 x 29.9) x 1 (36.2 x 66.1 x 29.9) x 1 (36.2 x 66.1 x 29.9) x 1

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

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

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

1 Outdoor Unit

14 16 18 20

ARUN140LN3 ARUN160LN3 ARUN180LN3 ARUN200LN3
ARUN140LN3 ARUN160LN3 ARUN180LN3 ARUN200LN3

7.0 7.0 7.5 9.0
23(35) 26(40) 29(45) 32(44)

260 x 1 260 x 1 315 x 1 325 x 1
573 x 1 573 x 1 694 x 1 716 x 1

(1,240 x 1,680 x 760) x 1 (1,240 x 1,680 x 760) x 1 (1,240 x 1,680 x 760) x 1 (1,240 x 1,680 x 760) x 1
(48.8 x 66.1 x 29.9) x 1 (48.8 x 66.1 x 29.9) x 1 (48.8 x 66.1 x 29.9) x 1 (36.2 x 66.1 x 29.9) x 1

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

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

Outdoor Units Information

Installation Manual 9

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD)

mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

2 Outdoor Unit

22 24 26 28

ARUN220LN3 ARUN240LN3 ARUN260LN3 ARUN280LN3
ARUN120LN3 ARUN120LN3 ARUN140LN3 ARUN160LN3
ARUN100LN3 ARUN120LN3 ARUN120LN3 ARUN120LN3

12.8 12.8 13.4 13.4
35(44) 39(48) 42(52) 45(56)

240 x 2 240 x 2 240 × 1 + 260 × 1 240 × 1 + 260 × 1

529 x 2 529 x 2 529 × 1 + 573 × 1 529 × 1 + 573 × 1

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

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

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

(36.2 x 66.1 x 29.9) x 2 (36.2 x 66.1 x 29.9) x 2

(36.2 x 66.1 x 29.9) x 1 (36.2 × 66.1 × 29.9) × 1

(48.8 x 66.1 x 29.9) x 1 (48.8 × 66.1 × 29.9) × 1

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

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

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

2 Outdoor Unit

30 32 34 36

ARUN300LN3 ARUN320LN3 ARUN340LN3 ARUN360LN3
ARUN160LN3 ARUN160LN3 ARUN180LN3 ARUN200LN3
ARUN140LN3 ARUN160LN3 ARUN160LN3 ARUN160LN3

14.0 14.0 14.5 16.0
49(60) 52(64) 55(64) 58(64)
260 × 2 260 × 2 260 × 1 + 315 × 1 260 × 1 + 325 × 1
573 × 2 573 × 2 573 × 1 + 694 × 1 573 × 1 + 716 × 1

(1,240 x 1,680 x 760) x 2 (1,240 x 1,680 x 760) x 2 (1,240 x 1,680 x 760) x 2 (1,240 x 1,680 x 760) x 2
(48.8 x 66.1 x 29.9) x 2 (48.8 x 66.1 x 29.9) x 2 (48.8 x 66.1 x 29.9) x 2 (48.8 x 66.1 x 29.9) x 2

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

34.9(1 3/8) 34.9(1 3/8) 34.9(1 3/8) 41.3(1 5/8)

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD)

mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

2 Outdoor Unit 3 Outdoor Unit

38 40 42 44

ARUN380LN3 ARUN400LN3 ARUN420LN3 ARUN440LN3
ARUN200LN3 ARUN200LN3 ARUN160LN3 ARUN160LN3
ARUN180LN3 ARUN200LN3 ARUN140LN3 ARUN160LN3

ARUN120LN3 ARUN120LN3

16.5 18.0 20.4 20.4
61(64) 64 64 64
315 × 1 + 325 × 1 325 × 2 240 × 1 + 260 × 2 240 × 1 + 260 × 2
694 × 1 + 716 × 1 716 × 2 529 × 1 + 573 × 2 529 × 1 + 573 × 2

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

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

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

(48.8 x 66.1 x 29.9) x 2 (48.8 x 66.1 x 29.9) x 2

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

(48.8 × 66.1 × 29.9) × 2 (48.8 × 66.1 × 29.9) × 2

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

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

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

3 Outdoor Unit

46 48 50 52

ARUN460LN3 ARUN480LN3 ARUN500LN3 ARUN520LN3
ARUN160LN3 ARUN160LN3 ARUN180LN3 ARUN200LN3
ARUN160LN3 ARUN160LN3 ARUN160LN3 ARUN160LN3
ARUN140LN3 ARUN160LN3 ARUN160LN3 ARUN160LN3

21.0 21.0 21.5 23.0
64 64 64 64

260 × 3 260 × 3 260 × 2 + 315 × 1 260 × 2 + 325 × 1

573 × 3 573 × 3 573 × 2 + 694 × 1 573 × 2 + 716 × 1
(1,240 x 1,680 x 760) x 3 (1,240 x 1,680 x 760) x 3 (1,240 x 1,680 x 760) x 3 (1,240 x 1,680 x 760) x 3
(48.8 x 66.1 x 29.9) x 3 (48.8 x 66.1 x 29.9) x 3 (48.8 x 66.1 x 29.9) x 3 (48.8 x 66.1 x 29.9) x 3

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

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

Outdoor Units Information

10 Outdoor Unit

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

3 Outdoor Unit

54 56 58 60

ARUN540LN3 ARUN560LN3 ARUN580LN3 ARUN600LN3
ARUN200LN3 ARUN200LN3 ARUN200LN3 ARUN200LN3
ARUN200LN3 ARUN200LN3 ARUN200LN3 ARUN200LN3
ARUN140LN3 ARUN160LN3 ARUN180LN3 ARUN200LN3

25.0 25.0 25.5 27.0
64 64 64 64

260 × 1 + 325 × 2 260 × 1 + 325 × 2 315 × 1 + 325 × 2 325× 3

573 × 1 + 716 × 2 573 × 1 + 716 × 2 694 × 1 + 716 × 2 716× 3
(1,240 x 1,680 x 760) x 3 (1,240 x 1,680 x 760) x 3 (1,240 x 1,680 x 760) x 3 (1,240 x 1,680 x 760) x 3
(48.8 x 66.1 x 29.9) x 3 (48.8 x 66.1 x 29.9) x 3 (48.8 x 66.1 x 29.9) x 3 (48.8 x 66.1 x 29.9) x 3

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

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

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

4 Outdoor Unit

62 64 66 68

ARUN620LN3 ARUN640LN3 ARUN660LN3 ARUN680LN3
ARUN160LN3 ARUN160LN3 ARUN180LN3 ARUN180LN3
ARUN160LN3 ARUN160LN3 ARUN160LN3 ARUN180LN3
ARUN160LN3 ARUN160LN3 ARUN160LN3 ARUN160LN3
ARUN140LN3 ARUN160LN3 ARUN160LN3 ARUN160LN3

28.0 28.0 28.5 29.0
64 64 64 64

260 × 4 260 × 4 260 × 3 + 315 × 1 260×2 + 315×2

573 × 4 573 × 4 573 × 3 + 694 × 1 573×2 + 694×2
(1,240 x 1,680 x 760) x 4 (1,240 x 1,680 x 760) x 4 (1,240 x 1,680 x 760) x 4 (1,240 x 1,680 x 760) x 4
(48.8 x 66.1 x 29.9) x 4 (48.8 x 66.1 x 29.9) x 4 (48.8 x 66.1 x 29.9) x 4 (48.8 x 66.1 x 29.9) x 4

22.2(7/8) 22.2(7/8) 22.2(7/8) 22.2(7/8)

44.5(1 3/4) 44.5(1 3/4) 53.98(2) 53.98(2)

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

4 Outdoor Unit

70 72 74 76

ARUN700LN3 ARUN720LN3 ARUN740LN3 ARUN760LN3
ARUN200LN3 ARUN200LN3 ARUN200LN3 ARUN200LN3
ARUN180LN3 ARUN200LN3 ARUN200LN3 ARUN200LN3
ARUN160LN3 ARUN160LN3 ARUN180LN3 ARUN200LN3
ARUN160LN3 ARUN160LN3 ARUN160LN3 ARUN160LN3

30.5 32.0 32.5 34.0
64 64 64 64

260 × 2 + 315 × 1 + 325 × 1 260 × 2 + 325 × 2 260×1 + 315×1 + 325×2 260 × 1 + 325 × 3
573 × 2 + 694 × 1 + 716 × 1 573 × 2 + 716 × 2 573×1 + 694×1 + 716×2 573 × 1 + 716 × 3

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

(48.8 x 66.1 x 29.9) x 4 (48.8 x 66.1 x 29.9) x 4 (48.8 x 66.1 x 29.9) x 4 (48.8 x 66.1 x 29.9) x 4

22.2(7/8) 22.2(7/8) 22.2(7/8) 22.2(7/8)

53.98(2) 53.98(2) 53.98(2) 53.98(2)

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

4 Outdoor Unit

78 80

ARUN780LN3 ARUN800LN3
ARUN200LN3 ARUN200LN3
ARUN200LN3 ARUN200LN3
ARUN200LN3 ARUN200LN3
ARUN180LN3 ARUN200LN3

34.5 36.0

64 64

315 × 1 + 325 × 3 325 × 4
694 × 1 + 716 × 3 716 × 4

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

(48.8 x 66.1 x 29.9) x 4 (48.8 x 66.1 x 29.9) x 4

22.2(7/8) 22.2(7/8)

53.98(2) 53.98(2)

Outdoor Units Information

Installation Manual 11

n Cooling Only

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

2 Outdoor Unit

22 24 26 28

ARUV220LT3 ARUV240LT3 ARUV260LT3 ARUV280LT3
ARUV120LT3 ARUV140LT3 ARUV140LT3 ARUV140LT3
ARUV100LT3 ARUV100LT3 ARUV120LT3 ARUV140LT3

12.8 12.8 12.8 12.8
35(44) 39(48) 42(52) 45(56)
185 x 1 + 235 x 1 185 x 1 + 235 x 1 235 x 2 235 x 2
408 x 1 + 518 x 1 408 x 1 + 518 x 1 518 x 2 518 x 2

(920 x 1,680 x 760) x 2 (920 x 1,680 x 760) x 2 (920 x 1,680 x 760) x 2 (920 x 1,680 x 760) x 2
(36.2 x 66.1 x 29.9) x 2 (36.2 x 66.1 x 29.9) x 2 (36.2 x 66.1 x 29.9) x 2 (36.2 x 66.1 x 29.9) x 2

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

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

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

1 Outdoor unit

6 8 10 12

ARUV60LT3 ARUV80LT3 ARUV100LT3 ARUV120LT3
ARUV60LT3 ARUV80LT3 ARUV100LT3 ARUV120LT3

4.0

4.0 6.4 6.4

10(12) 13(20) 16(25) 20(30)
155 x 1 155 x 1 185 x 1 235 x 1
341 x 1 341 x 1 408 x 1 518 x 1

(620 x 1,680 x 760) x 1 (620 x 1,680 x 760) x 1 (920 x 1,680 x 760) x 1 (920 x 1,680 x 760) x 1
(24.4 x 66.1 x 29.9) x 1 (24.4 x 66.1 x 29.9) x 1 (36.2 x 66.1 x 29.9) x 1 (36.2 x 66.1 x 29.9) x 1

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

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

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

1 Outdoor Unit

14 16 18 20

ARUV140LT3 ARUV160LT3 ARUV180LT3 ARUV200LT3
ARUV140LT3 ARUV160LT3 ARUV180LT3 ARUV200LT3

6.4 7.0 7.5 9.0
23(35) 26(40) 29(45) 32(44)
235 x 1 255 × 1 310 × 1 310 × 1
518 x 1 562 × 1 683 × 1 683 × 1

(920 x 1,680 x 760) x 1 (1,240 x 1,680 x 760) x 1 (1,240 x 1,680 x 760) x 1 (1,240 x 1,680 x 760) x 1
(36.2 x 66.1 x 29.9) x 1 (48.8 x 66.1 x 29.9) x 1 (48.8 x 66.1 x 29.9) x 1 (48.8 x 66.1 x 29.9) x 1

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

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

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg
lbs
Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

2 Outdoor Unit

30 32 34 36

ARUV300LT3 ARUV320LT3 ARUV340LT3 ARUV360LT3
ARUV160LT3 ARUV180LT3 ARUV200LT3 ARUV200LT3
ARUV140LT3 ARUV140LT3 ARUV140LT3 ARUV160LT3

13.4 13.9 15.4 16.0
49(60) 52(64) 55(64) 58(64)
235 × 1 + 255 × 1 235 × 1 + 310 × 1 235 × 1 + 310 × 1 255 × 1 + 310 × 1
518 × 1 + 562 × 1 518 × 1 + 683 × 1 518 × 1 + 683 × 1 562 × 1 + 683 × 1

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

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

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

(36.2 x 66.1 x 29.9) x 1 (36.2 x 66.1 x 29.9) x 1 (36.2 x 66.1 x 29.9) x 1

(48.8 x 66.1 x 29.9) x 2

(48.8 x 66.1 x 29.9) x 1 (48.8 x 66.1 x 29.9) x 1 (48.8 x 66.1 x 29.9) x 1

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

34.9(1 3/8) 34.9(1 3/8) 34.9(1 3/8) 41.3(1 5/8)

Outdoor Units Information

12 Outdoor Unit

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

2 Outdoor Unit 3 Outdoor Unit

38 40 42 44

ARUV380LT3 ARUV400LT3 ARUV420LT3 ARUV440LT3
ARUV200LT3 ARUV200LT3 ARUV140LT3 ARUV160LT3
ARUV180LT3 ARUV200LT3 ARUV140LT3 ARUV140LT3

ARUV140LT3 ARUV140LT3

16.5 18.0 19.2 19.8
61(64) 64 64 64
310 × 2 310 × 2 235 × 3 235 × 2 + 255 × 1
683 × 2 683 × 2 518 × 3 518 × 2 + 562 × 1

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

(920 × 1,680 × 760) × 2

(1,240 × 1,680 × 760) × 1

(48.8 × 66.1 × 29.9) × 2 (48.8 × 66.1 × 29.9) × 2 (48.8 × 66.1 × 29.9) × 3

(36.2 × 66.1 × 29.9) × 2

(48.8 × 66.1 × 29.9) × 1

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

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

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

3 Outdoor Unit

46 48 50 52

ARUV460LT3 ARUV480LT3 ARUV500LT3 ARUV520LT3
ARUV180LT3 ARUV200LT3 ARUV200LT3 ARUV200LT3
ARUV140LT3 ARUV140LT3 ARUV160LT3 ARUV180LT3
ARUV140LT3 ARUV140LT3 ARUV140LT3 ARUV140LT3

20.3 21.8 22.4 22.9

64 64 64 64
235 × 2 + 310 × 1 235 × 2 + 310 × 1 235 × 1 + 255 × 1 + 310 × 1 235 × 1 + 310 × 2

518 × 2 + 683 × 1 518 × 2 + 683 × 1 518 × 1 + 562 × 1 + 683 × 1 518 × 1 + 683 × 2
(920 x 1,680 x 760) x 2 (920 x 1,680 x 760) x 2 (920 x 1,680 x 760) x 1 (920 x 1,680 x 760) x 1
(1,240 x 1,680 x 760) x 1 (1,240 x 1,680 x 760) x 1 (1,240 x 1,680 x 760) x 2 (1,240 x 1,680 x 760) x 2

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

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

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

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

3 Outdoor Unit

54 56 58 60

ARUV540LT3 ARUV560LT3 ARUV580LT3 ARUV600LT3
ARUV200LT3 ARUV200LT3 ARUV200LT3 ARUV200LT3
ARUV200LT3 ARUV200LT3 ARUV200LT3 ARUV200LT3
ARUV140LT3 ARUV160LT3 ARUV180LT3 ARUV200LT3

24.4 25.0 25.5 27.0
64 64 64 64
235 × 1 + 310 × 2 255 × 1 + 310 × 2 310 × 3 310 × 3
518 × 1 + 683 × 2 562 × 1 + 683 × 2 683 × 3 683 × 3

(920 x 1,680 x 760) x 1

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

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

(36.2 x 66.1 x 29.9) x 1

(48.8 x 66.1 x 29.9) x 3 (48.8 x 66.1 x 29.9) x 3 (48.8 x 66.1 x 29.9)

x 3

(48.8 x 66.1 x 29.9) x 2

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

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

Outdoor Units Information

Installation Manual 13

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

4 Outdoor Unit

62 64 66 68

ARUV620LT3 ARUV640LT3 ARUV660LT3 ARUV680LT3
ARUV200LT3 ARUV200LT3 ARUV200LT3 ARUV200LT3
ARUV140LT3 ARUV160LT3 ARUV180LT3 ARUV200LT3
ARUV140LT3 ARUV140LT3 ARUV140LT3 ARUV140LT3
ARUV140LT3 ARUV140LT3 ARUV140LT3 ARUV140LT3

28.2 28.8 29.3 30.8
64 64 64 64

235 × 3 + 310 × 1

235 × 2 + 255 × 1 + 310 × 1

235 × 2 + 310 × 2 235 × 2 + 310 × 2

518 × 3 + 683 × 1

518 × 2 + 562 × 1 + 683 × 1

518 × 2 + 683 × 2 518 × 2 + 683 × 2

(920 x 1,680 x 760) x 3 (920 x 1,680 x 760) x 2 (920 x 1,680 x 760) x 2 (920 x 1,680 x 760) x 2

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

(36.2 x 66.1 x 29.9) x 3 (36.2 x 66.1 x 29.9) x 2 (36.2 x 66.1 x 29.9) x 2 (36.2 x 66.1 x 29.9) x 2

(48.8 x 66.1 x 29.9) x 1 (48.8 x 66.1 x 29.9) x 2 (48.8 x 66.1 x 29.9) x 2 (48.8 x 66.1 x 29.9) x 2

22.2(7/8) 22.2(7/8) 22.2(7/8) 22.2(7/8)

44.5(1 3/4) 44.5(1 3/4) 53.98(2) 53.98(2)

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

4 Outdoor Unit

70 72 74 76

ARUV700LT3 ARUV720LT3 ARUV740LT3 ARUV760LT3
ARUV200LT3 ARUV200LT3 ARUV200LT3 ARUV200LT3
ARUV200LT3 ARUV200LT3 ARUV200LT3 ARUV200LT3
ARUV160LT3 ARUV180LT3 ARUV200LT3 ARUV200LT3
ARUV140LT3 ARUV140LT3 ARUV140LT3 ARUV160LT3

31.4 31.9 33.4 34.0
64 64 64 64

235 × 1 + 255 × 1 + 310 × 2

235 × 1 + 310 × 3 235 × 1 + 310 × 3 255 × 1 + 310 × 3

518 × 1 + 562 × 1 + 683 × 2

518 × 1 + 683 × 3 518 × 1 + 683 × 3 562 × 1 + 683 × 3

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

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

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

(36.2 x 66.1 x 29.9) x 1 (36.2 x 66.1 x 29.9) x 1 (36.2 x 66.1 x 29.9) x 1

(48.8 x 66.1 x 29.9) x 4

(48.8 x 66.1 x 29.9) x 3 (48.8 x 66.1 x 29.9) x 3 (48.8 x 66.1 x 29.9) x 3

22.2(7/8) 22.2(7/8) 22.2(7/8) 22.2(7/8)

53.98(2) 53.98(2) 53.98(2) 53.98(2)

Unit
System(HP)
Model

Product Charge kg
Max. Connectable No. of Indoor Units
Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]

4 Outdoor Unit

78 80

ARUV780LT3 ARUV800LT3
ARUV200LT3 ARUV200LT3
ARUV200LT3 ARUV200LT3
ARUV200LT3 ARUV200LT3
ARUV180LT3 ARUV200LT3

34.5 36.0

64 64
310 × 4 310 × 4
683 × 4 683 × 4

(1,240 x 1,680 x 760) x 4 (1,240 x 1,680 x 760) x 4
(48.8 x 66.1 x 29.9) x 4 (48.8 x 66.1 x 29.9) x 4

22.2(7/8) 22.2(7/8)

53.98(2) 53.98(2)

14 Outdoor Unit

Environment-friendly Alternative Refrigerant R410A

Select the Best Location

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

• No direct thermal radiation from other heat sources

• No possibility of annoying neighbors by noise from unit

• No exposition to strong wind

• With strength which bears weight of unit

• Note that drain flows out of unit when heating

• With space for air passage and service work shown next

• Because of the possibility of fire, do not install unit to the space where generation, inflow, stagnation, and
leakage of combustible gas is expected.

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

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

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

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

- Make the foundation as high as possible.

- Fit a snow protection hood.

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

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

product at a place With a high humidity in winter (near beach, coast, lake, etc. )
(Ex : Rooftop where there is always sunshine.)

• 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.

Environment-friendly Alternative Refrigerant R410A

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.

Installation Manual 15

Installation Space

Installation Space

Individual Installation

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

as shown in the figures below.

) -

*

,

)

+

*

,

-

+

) -

*

.

+

,

) -

*

.

+

,

)

-

*

)

*

-

Category

Case 1

(10mm≤Side Space≤49mm)

Case 2

(Side Space

≥

49mm)

Installation Space

4 sides are

walls

Only 2 sides

are walls

Limitations on

the height of

the wall

(Refer to 4

side walls)

Front

Front

Front

Front

Front

Front

Front

Front

Front

No limit to the height of the wall

No limit to the
height of the wall

Front

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

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

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

• If the height of the walls on the front and the side are higher than the limit,
there must be additional space on the front and the side.

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

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

- h2= A(Actual height) - 1500

- h1= B(Actual height) - 500

A≥10 A≥50
B≥300 B≥100
C≥10 C≥50
D≥500 D≥500

A≥10 A≥50
B≥300 B≥100
C≥10 C≥50
D≥500 D≥500
E≥20 E≥100

A≥10 A≥50
B≥300 B≥100
C≥10 C≥50
D≥500 D≥500
E≥20 E≥100
F≥600 E≥500

A≥10 A≥50
B≥300 B≥100
C≥10 C≥50
D≥300 D≥100
E≥20 E≥100
F

≥500 E≥500

A≥10
B≥300

A≥200
B≥300
E≥400

P



)



P



*



16 Outdoor Unit

Installation Space

Seasonal wind and cautions in winter

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

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

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

• Install the outdoor unit not to come in contact with snow directly. If snow piles up and freezes on the air suction
hole, the system may malfunction. If it is installed at snowy area, attach the hood to the system.

• Install the outdoor unit at the higher installation console by 50cm than the average snowfall (annual average
snowfall) if it is installed at the area with much snowfall.

• Where snow accumulated on the upper part of the Outdoor Unit by more than 10cm, always remove snow for
operation.

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

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

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

Installation Manual 17

Lifting Method

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

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

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

Lifting method

CAUTION

Be very careful while carrying the product.

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

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

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

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

• When carrying in Outdoor Unit, be sure to support it at four points. Carrying in and lifting with 3-point
support may make Outdoor Unit unstable, resulting in a fall.

• Use 2 belts of at least 8 m long.

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

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

Weight per Capacity

Locking points for

transportation ropes

Chassis

Capacity(HP) Weight(kg)

Heat Pump Cooling Only Heat Pump Cooling Only

UX1

- 6 - 155

- 8 - 155

UX2

8 - 190 ­10 10 240 185
12 12 240 235

- 14 - 235

UX3

14 - 260 ­16 16 260 255
18 18 315 310
20 20 325 310

Forklift Carrying Hole

Forklift Carrying Guide

18 Outdoor Unit

Installation

Installation

The location of the Anchor bolts

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

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

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

• Anchor bolts must be inserted at least 75mm.

At least 100mm

At least 100mm

At least 100mm

At least 100mm

At least 100mm

At least 100mm

Needed for outdoor units of 23kW or above

Center of the Unit

For outdoor units of 23kW or
above should not be supported
only by the corner supports.
Outdoor units of 14.5, 16kW
can be supported only by the
corner supports.

Needed for outdoor units of 23kW or above

Center of the Unit

730

760

6565

Unit : mm

At least 65At least 65

Chassis

Outdoor Unit Capacity

A(mm) B(mm)

H/P C/O
UX1 6~8HP 620 497
UX2 8~12HP 10~14HP 920 792
UX3 14~20HP 16~20HP 1240 1102

Installation Manual 19

Installation

Foundation for Installation

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

• Use the H-beam support as a base support

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

WARNING

• Install where it can sufficiently support the weight of the outdoor unit.
If the support strength is not enough, the outdoor unit may drop and hurt people.

• Install where the outdoor unit may not fall in strong wind or earthquake.
If there is a fault in the supporting conditions, the outdoor unit may fall and hurt people.

• Please take extra cautions on the supporting strength of the ground, water outlet
treatment(treatment of the water flowing out of the outdoor unit in operation), and the passages of
the pipe and wiring, when making the ground support.

• Do not use tube or pipe for water outlet in the Base pan. Use drainage instead for water outlet.
The tube or pipe may freeze and the water may not be drained.

WARNING

• Be sure to remove the Pallet(Wood Support) of the bottom
side of the outdoor unit Base Pan before fixing the bolt. It
may cause the unstable state of the outdoor settlement,
and may cause freezing of the heat exchanger resulting in
abnormal operations.

• Be sure to remove the Pallet(Wood Support) of the bottom
side of the outdoor unit before welding. Not removing
Pallet(Wood Support) causes hazard of fire during
welding.

At least 200mm

Unit : mm

200

75

75

200

100

- The corner part must be fixed firmly. Otherwise, the
support for the installation may be bent.

- Get and use M10 Anchor bolt.

- Put Cushion Pad between the outdoor unit and ground
support for the vibration protection in wide area.

- Space for pipes and wiring (Pipes and wirings for bottom
side)

- H-beam support

- Concrete support

Pallet(Wood Support)

- Remove before Installation

20 Outdoor Unit

Installation

Preparation of Piping

1) Cut the pipes and the cable.

n Use the accessory piping kit or the pipes purchased

locally.

n Measure the distance between the indoor and the

outdoor unit.

n Cut the pipes a little longer than measured distance.
n Cut the cable 1.5m longer than the pipe length.

2) Burrs removal

n Completely remove all burrs from the cut cross section

of pipe/tube.

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

direction as you remove burrs in order to avoid to let
burrs drop in the tubing.

3) Flaring work

n Carry out flaring work using flaring tool as shown

below.

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

4) Check

n Compare the flared work with figure below.
n If flare is noted to be defective, cut off the flared section

and do flaring work again.

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

Pipe

" A "

Gas Liquid Gas

Liquid
<5.6(19,100) 1/2" 1/4" 0.5~0.8 0~0.5
<16.0(54,600) 5/8" 3/8" 0.8~1.0 0.5~0.8
<22.4(76,400) 3/4" 3/8" 1.0~1.3 0.5~0.8

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 =

Installation Manual 21

Installation

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

2. Turn it until the shaft stops.
Do not apply excessive force to the shutoff valve. Doing so may break the valve body, as the valve is not a
backseat type. Always use the special tool.

3. Make sure to tighten the cap securely.

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

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

3. Make sure to tighten the cap securely.
* For the tightening torque, refer to the table on the below.

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.

Tightening torque

Union

CAUTION

• Always use a charge hose for service port connection.

•

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

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

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

Opening shutoff valve

Closing shutoff valve

FLARE SHAPE and FLARE NUT TIGHTENING TORQUE

Shutoff

valve size

Ø6.4
Ø9.5

Ø12.7

Ø15.9

Ø22.2
Ø25.4

13.5-16.5

18-22

14-17
33-39
50-60

62-75

23-27

13.5-16.5

5.4-6.6

Hexagonal

wrench 4mm

Hexagonal

wrench 6mm

Hexagonal

wrench 10mm

8.1-9.9

27-33 36-44

-

11.5-13.9

22-28-

Tightening torque N-m(Turn clockwise to close)

Shaft(valve body)

Gas line piping attached to unit

Cap(Valve lid) Service port Flare nut

90°

±2

45

°

±

2

A

R=0.4~0.8

pipe size tightening torque(Ncm) A(mm) flare shape

Ø9.5 3270-3990 12.8-13.2

Ø12.7 4950-6030 16.2-16.6

Ø15.9 6180-7540 19.3-19.7

22 Outdoor Unit

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

Installation Manual 23

Precautions on Pipe connection / Valve operation

Refrigerant piping installation

Refrigerant piping installation

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

connect between the outdoor units using pipes.

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

before connecting. Otherwise, the unit may not operate because
of the sludge inside the pipe.

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

2

) for

work area leakage test.

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

vacuuming work for more than 1 hour.

5. Open the side pole with hexagonal wrench.

Installing 2 units

Installing 3 units

Installing 4 units

Gas pipe

Liquid pipe

Common pipe

Pipe connection is done by connecting from the end of the pipe to the
branching pipes, and the refrigerant pipe coming out of the outdoor
unit is divided at the end to connect to each indoor unit. Flare
connection for the indoor unit, and welding connection for the outdoor
pipe and the branching parts.

• Use hexagonal wrench to open/close the valve.

h When connecting to high low pressure

common pipe, connect pipes using
connecting elbows.

Detach knock outs according
the usages.

Detach
knock outs
according
the usages.

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

low pressure common pipe)

WARNING

• Always careful not to leak the refrigerant during welding.

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

• Do not perform welding in a closed space.

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

CAUTION

Please block the pipe knock outs of the front and side panels after installing the pipes.
(Animals or foreign objects may be brought in to damage the cables.)

High Low Pressure Common Pipe Connections

24 Outdoor Unit

Refrigerant piping installation

2 outdoor units

Connection of Outdoor units

2 Unit

3 Unit

4 Unit

ARCNN21

ARCNN31

ARCNN41

C

C

C

C

C

A

130

408

416

111

I.D.28.58

I.D.34.9I.D.31.8

I.D.28.58

I.D.28.58

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

I.D.22.2

125

341
298

111

I.D.41.3

O.D.34.9

I.D.34.9I.D.41.3

I.D.28.58

415
375

I.D.41.3

I.D.28.58

I.D.44.48 I.D.53.98

134

7

0

83

314

331

I.D.22.2 O.D.19.05

I.D.15.88

I.D.19.05

I.D.15.88I.D.12.7

I.D.12.7

I.D.15.88

I.D.9.52

334
281

83

I.D.19.05

I.D.12.7 I.D.15.88

I.D.19.05I.D.22.2

334
281

83

80

I.D.25.4

O.D.22.2

I.D.19.05

I.D.12.7 I.D.15.88

I.D.19.05I.D.22.2

Outdoor units Model Gas pipe Liquid pipe

For more information, refer accessory installation manual.

[Unit : mm]

Y branch

A

B

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

Within +/- 10

Installation Manual 25

Refrigerant piping installation

To Outdoor Unit

Sealed Piping

A

A

B

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 perform a pump down. This will not only damage the compressor but also deteriorate the

performance.

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

Caution

ARBL054 ARBL057 ARBL1010

ARBL104 ARBL107 ARBL2010

Y branch

ARBLN01621, ARBLN03321, ARBLN07121,

ARBLN14521, ARBLN23220

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 1.55 2.1

41.3

44.45 53.98

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]

26 Outdoor Unit

Refrigerant piping installation

WARNING

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

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

- After selecting diameter of the refrigerant pipe to suit total capacity of the indoor unit connected after
branching, use an appropriate branch pipe set according to the pipe diameter of the indoor unit and the
installation pipe drawing.

12. Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling
performance, drip of condensate and other such problems.

13. When connecting the refrigerant piping, make sure the service valves of the Outdoor Unit is completely
closed (the factory setting) and do not operate it until the refrigerant piping for the Outdoor and Indoor
Units has been connected, a refrigerant leakage test has been performed and the evacuation process
has been completed.

14. Always use a non-oxidizing brazing material for brazing the parts and do not use flux. If not, oxidized
film can cause clogging or damage to the compressor unit and flux can harm the copper piping or
refrigerant oil.

Installation Manual 27

Left Side Pipe Draw Out

Front Side Pipe Draw Out

Right Side Pipe Draw Out

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

• Be sure to let 0.2kgf/cm

2

Nitrogen flow in the pipe when welding.

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

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

Refrigerant Pipe

Regulator

Nitrogen

Nitrogen
Direction

Taping

Valve

1. Open the front panel.

2. Remove Brackets

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

Brackets for Transportation

Washer

Nut

Pipe connections between indoor and outdoor unit

Preparation Work

CAUTION

•

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

•

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

• Perform sleeve work to prevent damage to the wire when
connecting wires using knock Outs.

CAUTION

• Remove the brackets on the inverter condenser legs that were fixed to protect the unit during the transportation.
(If bracket is not removed, abnormal noise or vibration may occur.)

Pipe connections between indoor and outdoor unit

Removal Area for common
pipe bottom side connections.

Removal Area for Liquid/Gas pipe
bottom side connections.

28 Outdoor Unit

n Remove leakage prevention cap

• Remove the leakage prevention cap attached to the
outdoor unit service valve before pipe work.

• Proceed the leakage prevention cap removal as follows:

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

locked.

2. Extract remaining refrigerant or air inside using the

service port.

3. Remove the leakage prevention cap

n Method of pipe cap work during the

installation of single outdoor unit

1. Remove rubber cap inserted in the common pipe.

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

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

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

that the pipe cap does not move.

5. Weld the pipe cap.

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

inside the valve.

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

abnormality in the cycle caused by refrigerant leakage.

n Method of drawing out pipes on the front side

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

Pipe Cap
Flare Nut

Pipe Drawing Out during Single / Series connection

Common pipe Liquid pipe Gas pipe

Pipe Knock Out for

Liquid/Gas pipes

Pipe Knock Out for

common pipes

Pipe connections between indoor and outdoor unit

Common pipe

Liquid pipe

Gas pipe

Service Port

Leakage Prevention Cap

Installation Manual 29

Common pipe Liquid pipe Gas pipe

Remove only liquid/gas pipe Knock Out Remove Base Pan

Common pipe

Remove Base Pan

Liquid pipe Gas pipe

n Method of drawing out pipes on the bottom side

①

Drawing out common pipe through side panel

n Figure of Sides when drawing out through bottom pipe

②

Drawing out common pipe through bottom pipe

Pipe connections between indoor and outdoor unit

i) Single outdoor unit

ii) Series outdoor units

(Draw out common pipes
through bottom)

iii) Series outdoor units

(Draw out common pipes
through side panel)

Remove Pipe
Knock Out Hole

30 Outdoor Unit

Pipe connections between indoor and outdoor unit

u Y branch method

Refrigerant piping system

1 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Indoor Units

l

40m (90 m : Conditional application)

H 110m

L150m (200 m : Conditional application)

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

Additional Application

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

1) Diameter of pipes between first branch and the last branch should be increased by one step,
except pipe diameter B,C,D is same as Diameter A
Ø6.35 ’ Ø 9.52 ’ Ø 12.7 ’ Ø 15.88 ’ Ø 19.05 ’ Ø 22.2 ’ Ø 25.4*, Ø 28.58 ’ Ø 31.8*, Ø 34.9 ’ Ø

38.1*
* : It is not necessary to size up.

2) While calculating whole refrigerant pipe length, pipe B,C,D length should be calculated twice.
A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 1,000 m

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

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

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

2 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Indoor Units
Ⓓ : Downward Indoor Unit
Ⓔ : Connection branch pipe

between Outdoor units:
ARCNN21

10m or

less

Slave

Slave

Master

H 110m

Slave

Master

L150m (200 m : Conditional application)

l 40m (90 m : Conditional application)

Master

ODU Capacity
Master Slave

Installation Manual 31

Pipe connections between indoor and outdoor unit

3 Outdoor Units

Example : 5 Indoor Units

connected

Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Indoor Units
Ⓓ : Downward Indoor Unit
Ⓔ : Connection branch pipe

between Outdoor units:
ARCNN31

Ⓕ : Connection branch pipe

between Outdoor units:
ARCNN21

4 Outdoor Units

Example : 5 Indoor Units

connected

Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Indoor Units
Ⓓ : Downward Indoor Unit
Ⓔ : Connection branch pipe

between Outdoor units:
ARCNN41

Ⓕ : Connection branch pipe

between Outdoor units:
ARCNN31

Ⓖ : Connection branch pipe

between Outdoor units :
ARCNN21

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

Additional Application

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

1) Diameter of pipes between first branch and the last branch should be increased by one step,
except pipe diameter B,C,D is same as Diameter A
Ø6.35 ’ Ø 9.52 ’ Ø 12.7 ’ Ø 15.88 ’ Ø 19.05 ’ Ø 22.2 ’ Ø 25.4*, Ø 28.58 ’ Ø 31.8*, Ø 34.9 ’ Ø

38.1*
* : It is not necessary to size up.

2) While calculating whole refrigerant pipe length, pipe B,C,D length should be calculated twice.
A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 1,000 m

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

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

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

10m or

less

10m or

less

H 110m

G

H 110m

Slave2

Slave3

Slave1

Master

L150m (200 m : Conditional application)

l

40m (90 m : Conditional application)

Slave2

Slave1

Master

Master ≥ Slave1 ≥ Slave 2 ≥ Slave 3

L150m (200 m : Conditional application)

l

40m (90 m : Conditional application)

ODU Capacity

Master ≥ Slave1 ≥ Slave 2

ODU Capacity

32 Outdoor Unit

Pipe connections between indoor and outdoor unit

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

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

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

• ** : To apply Conditional Application

Downward Indoor Unit total capacity

[kW(Btu/h)]

≤ 5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)
< 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8)
≤ 22.4(76,400) Ø9.52(3/8) Ø19.05(3/4)
< 33.6(114,700) Ø9.52(3/8) Ø22.2(7/8)
< 50.4(172,000) Ø12.7(1/2) Ø28.58(11/8 )
< 67.2(229,400) Ø15.88(5/8) Ø28.58(11/8 )
< 72.8(248.500) Ø15.88(5/8) Ø34.9(13/8)
< 100.8(344,000) Ø19.05(3/4) Ø34.9(13/8)
< 173.6(592,500) Ø19.05(3/4) Ø41.3(15/8)
< 184.8(630,700) Ø22.2(7/8) Ø44.5(13/4)
< 224.0(764,400) Ø22.2(7/8) Ø53.98(2)

Liquid pipe
[mm(inch)]

Gas pipe

[mm(inch)]

Longest pipe length Equivalent pipe length

A+B+C+D+e ≤ 150m(200 m**) *A+B+C+D+e ≤ 175m(225 m**)

Longest pipe length after 1st branch

B+C+D+e ≤ 40m(90 m**)

Difference in height(Outdoor Unit ÷ Indoor Unit)

H ≤ 110m

Difference in height (Indoor Unit ÷ Indoor Unit)

h ≤15m

Difference in height (Outdoor Unit ÷ Outdoor Unit)

h1 ≤ 5m

L

l

H

h

h1

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

WARNING

If overall equivalent pipe length is more than 90m from ODU to the longest IDU,
The diameter of the main pipe (Gas and Liquid pipes) must be increased as follow.

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

Outdoor unit

Total capacity

[kW (Btu/h)

Standard Pipe Diameter

Conditional application

(more than 90m from ODU to IDU)

Liquid pipe

[mm (inch)]

Gas pipe

[mm (inch)]

Liquid pipe
[mm (inch)]

Gas pipe

[mm (inch)]

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

Φ9.52(3/8)

Φ19.05(3/4)

Φ12.7(1/2)

Φ22.2(7/8)

28.0(95,900)

Φ22.2(7/8) Φ25.4(1)

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

Φ12.7(1/2)

Φ28.58(1 1/8)

Φ15.88(5/8) Φ28.58(1 1/8)

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

Φ15.88(5/8) Φ19.05(3/4)

Φ31.8(1 1/4)

67.2(229,400)

Φ34.9(1 3/8)

Φ34.9(1 3/8)

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

Φ19.05(3/4) Φ22.2(7/8)

Φ38.1(1 1/2)

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

Φ41.3(1 5/8) Φ41.3(1 5/8)

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

Φ22.2(7/8)

Φ44.5(1 3/4)

Φ25.4(1) Φ53.98(2)

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

Φ53.98(2)

Installation Manual 33

Pipe connections between indoor and outdoor unit

1 Outdoor Unit

Example : 6 Indoor Units connected

Ⓐ : Outdoor Unit
Ⓑ : 1st branch
Ⓒ : Indoor Units
Ⓓ : Sealed piping

L 200m

40m

H 110m

10m or
less

L 110m

L 200m

40m

Slave

Master

Slave

Master

Slave

Master

ODU Capacity
Master ≥ Slave

2 Outdoor Units

Example : 6 Indoor Units connected

Ⓐ : Outdoor Unit
Ⓑ : Header branch
Ⓒ : Indoor Units
Ⓓ : Sealing
Ⓔ : Connection branch pipe

between Outdoor units:
ARCNN21

u Header Method

34 Outdoor Unit

Pipe connections between indoor and outdoor unit

Longest pipe length * Equivalent pipe length
A+f ≤ 200m A+f ≤ 225m
Longest pipe length after 1st branch
f ≤ 40m
Difference in height(Outdoor Unit ÷ Indoor Unit)
H ≤ 110m
Difference in height (Indoor Unit ÷ Indoor Unit)
h ≤15m
Difference in height

(Outdoor Unit ÷ Outdoor Unit)

h1 ≤ 5m

L

l

H

h

h1

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

WARNING

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

• * :

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

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

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

Branch pipe can not be used after header

Branch pipe can not be used after header

3 Outdoor Units

Example : 6 Indoor Units connected

Ⓐ : Outdoor Unit
Ⓑ : Header branch
Ⓒ : Indoor Units
Ⓓ : Sealing
Ⓔ : Connection branch pipe

between Outdoor units:
ARCNN31

Ⓕ : Connection branch pipe

between Outdoor units:
ARCNN21

4 Outdoor Units

Example : 6 Indoor Units connected

Ⓐ : Outdoor Unit
Ⓑ : Header branch
Ⓒ : Indoor Units
Ⓓ : Sealing
Ⓔ : Connection branch pipe

between Outdoor units:
ARCNN41

Ⓕ : Connection branch pipe

between Outdoor units:
ARCNN31

Ⓖ : Connection branch pipe

between Outdoor units :
ARCNN21

G

F

E

10m or
less

H 110m

G

10m or
less

Slave2

Slave1

Slave3

F

H 110m

Slave2

E

Master

Slave1

Master

ODU Capacity

Master ≥ Slave1 ≥ Slave2

L 200m

40m

ODU Capacity

Master ≥ Slave1 ≥ Slave2 ≥ Slave3

L 200m

40m

Installation Manual 35

Pipe connections between indoor and outdoor unit

u Combination of Y branch/header method

1 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header
Ⓕ : Sealed piping

L 150m(200m : Conditional application)

40m(90m : Conditional application)

L 110m

Branch pipe can not be used after header

Branch pipe can not be used after header

2 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit
Ⓑ : 1st branch
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Connection branch pipe

between Outdoor units:
ARCNN21

Ⓕ : Header
Ⓖ : Sealed piping

10m or
less

H 110m

Master

Slave

Master

Slave

Master

Slave

L 150m(200m : Conditional application)

40m(90m : Conditional application)

ODU Capacity
Master ≥ Slave

36 Outdoor Unit

Pipe connections between indoor and outdoor unit

Branch pipe can not be used after header

3 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit
Ⓑ : 1st branch(Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Connection branch pipe

between Outdoor units:
ARCNN31

Ⓕ : Connection branch pipe

between Outdoor units:
ARCNN21

Ⓖ : Header
Ⓗ : Sealing

F

E

Branch pipe can not be used after header

4 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit
Ⓑ : 1st branch(Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Connection branch pipe

between Outdoor units:
ARCNN41

Ⓕ : Connection branch pipe

between Outdoor units:
ARCNN31

Ⓖ : Connection branch pipe

between Outdoor units:
ARCNN21

Ⓗ : Header
Ⓘ : Sealing

G

F

E

10m or
less

F

Slave2

H 110m

Slave1

E

Master

Master ≥ Slave1 ≥ Slave2

ODU Capacity

L 150m(200m : Conditional application)

40m(90m : Conditional application)

Slave3

Slave2

Slave1

10m or
less

Master

G

F

E

H 110m

ODU Capacity

Master ≥ Slave1 ≥ Slave2 ≥ Slave3

L 150m(200m : Conditional application)

40m(90m : Conditional application)

Installation Manual 37

Pipe connections between indoor and outdoor unit

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

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

Longest pipe length * Equivalent pipe length
A+B+b ≤ 150m(200m**) A+B+b ≤ 175m(225m**)
Longest pipe length after 1st branch
B+b ≤ 40m(90m**)
Difference in height(Outdoor Unit ÷ Indoor Unit)
H ≤ 110m
Difference in height (Indoor Unit ÷ Indoor Unit)
h ≤ 15m
Difference in height (Outdoor Unit ÷ Outdoor Unit)
h1 ≤ 5m

L

l

H

h

h1

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.

• * :

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.

Downward Indoor Unit total capacity

[kW(Btu/h)]

≤ 5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)
< 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8)
≤ 22.4(76,400) Ø9.52(3/8) Ø19.05(3/4)
< 33.6(114,700) Ø9.52(3/8) Ø22.2(7/8)
< 50.4(172,000) Ø12.7(1/2) Ø28.58(11/8 )
< 67.2(229,400) Ø15.88(5/8) Ø28.58(11/8 )
< 72.8(248,500) Ø15.88(5/8) Ø34.9(13/8)
< 100.8(344,000) Ø19.05(3/4) Ø34.9(13/8)
< 173.6(592,500) Ø19.05(3/4) Ø41.3(15/8)
< 184.8(630,700) Ø22.2(7/8) Ø44.5(13/4)
< 224.0(764,400) Ø22.2(7/8) Ø53.98(2)

Liquid pipe

[mm(inch)]

Gas pipe

[mm(inch)]

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

WARNING

If overall equivalent pipe length is more than 90m from ODU to the longest IDU,
The diameter of the main pipe (Gas and Liquid pipes) must be increased as follow.

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

Outdoor unit

Total capacity

[kW (Btu/h)

Standard Pipe Diameter

Conditional application

(more than 90m from ODU to IDU)

Liquid pipe

[mm (inch)]

Gas pipe

[mm (inch)]

Liquid pipe
[mm (inch)]

Gas pipe

[mm (inch)]

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

Φ9.52(3/8)

Φ19.05(3/4)

Φ12.7(1/2)

Φ22.2(7/8)

28.0(95,900)

Φ22.2(7/8) Φ25.4(1)

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

Φ12.7(1/2)

Φ28.58(1 1/8)

Φ15.88(5/8) Φ28.58(1 1/8)

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

Φ15.88(5/8) Φ19.05(3/4)

Φ31.8(1 1/4)

67.2(229,400)

Φ34.9(1 3/8)

Φ34.9(1 3/8)

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

Φ19.05(3/4) Φ22.2(7/8)

Φ38.1(1 1/2)

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

Φ41.3(1 5/8) Φ41.3(1 5/8)

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

Φ22.2(7/8)

Φ44.5(1 3/4)

Φ25.4(1) Φ53.98(2)

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

Φ53.98(2)

38 Outdoor Unit

Pipe connections between indoor and outdoor unit

u Outdoor unit Connection

WARNING

• In case of pipe diameter B connected after first branch is bigger than the main pipe diameter A, B should be of
the same size with A.
Ex) In case indoor unit combination ratio 120% is connected to 70kW outdoor unit.

1) Outdoor unit main pipe diameter A : Ø34.9(gas pipe), Ø15.88(liquid pipe)

2) Pipe diameter B after first branch according to 120% indoor unit combination(84kW) :Ø34.9(gas pipe),
Ø19.05(liquid pipe)
Therefore, pipe diameter B connected after first branch would be Ø34.9(gas pipe)/Ø15.88(liquid pipe)
which is same with main pipe diameter.

[Example]

Do not choose the main pipe diameter by downward indoor unit total capacity but its outdoor unit model name.
Do not let the connection pipe from branch to branch exceed the main pipe diameter chosen by outdoor unit model
name.
EX) Where connecting the indoor units to the 22 HP (61.5 kW) outdoor unit to 120% of its system capacity (73.8 kW)

and branching 7k (2.1kW) indoor unit at the 1st branch
Main pipe diameter(22 HP outdoor unit): Ø28.58(Gas pipe) Ø15.88(Liquid pipe)
Pipe diameter between 1st and 2nd branch (71.7kW indoor units):
Ø34.9(Gas pipe) Ø19.05(Liquid pipe) in conformity with downward indoor units.
Since the main pipe diameter of 22HP outdoor unit is Ø28.58(Gas pipe) and Ø15.88(Liquid pipe), Ø28.58 (Gas pipe) and
Ø15.88 (Liquid pipe) is used as the main pipe and the connection pipe between 1st and 2nd branch.

u Indoor Unit Connection

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

Indoor Unit capacity [kW(Btu/h)]

≤ 5.6(19,100)

< 16.0(54,600)

< 22.4(76,400)

Ø6.35(1/4)

Ø9.52(3/8)

Ø9.52(3/8)

Ø12.7(1/2)

Ø15.88(5/8)

Ø19.05(3/4)

Liquid pipe

[mm(inch)]

Gas pipe

[mm(inch)]

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

Installation Manual 39

Pipe connections between indoor and outdoor unit

n Pipe connection between outdoor units

(General Case)

n Pipes between outdoor units are

2m or less

n Pipes between outdoor units are

2m or longer

n Examples of Wrong Pipe Connections

The maximum pipe length
after the first branching
between the outdoor units is
10m or less

2m or less

Oil Trap

Oil Trap Oil Trap

2m or less

2m or less 2m or less

0.2m or more

2m or longer

2m or longer2m or longer

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

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

If the main pipe is higher
than the outdoor units, oil
is accumulated in the
outdoor unit.

If there are differences in the height
between the outdoor units, oil is
accumulated in the lower outdoor unit.

Oil Trap

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

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

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

40 Outdoor Unit

Pipe connections between indoor and outdoor unit

• The pipes between the outdoor units must maintain horizontal levelness or give an inclination to prevent a back flow
toward the slave outdoor unit. Otherwise, the unit may not operate properly.

• Apply Oil Trap as shown below when the length of the pipe between the outdoor units is more than 2m.
Otherwise, the unit may not operate properly.

Toward indoor unit

Toward indoor unit

Pipe inclination (2° or more)

Toward indoor unit

Toward indoor unit

Toward indoor unit

Toward indoor unit

(Example 1)

(Example 2)

(Example 3)

(Example 1)

(Example 2)

Toward indoor unit

Toward indoor unit

≤ 2m

≤ 2m

≥ 2m

≥ 0.2m

Oil Trap

Installation Manual 41

• When connecting the pipes between the outdoor units, the accumulation of oil in the slave outdoor unit should be avoided.
Otherwise, the unit may not operate properly.

Toward indoor unit

Toward indoor unit

(Example 1)

(Example 2)

(Example 3)

h

h

h

≥ 0.2m

Toward indoor unit

Toward indoor unit Toward indoor unit

Oil Trap

Pipe connections between indoor and outdoor unit

42 Outdoor Unit

Pipe connections between indoor and outdoor unit

u

The amount of Refrigerant

The calculation of the additional charge should take into account the length of pipe and CF(correction
Factor) value of indoor unit.

CAUTION

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

Amount refrigerant of Indoor units
Example) 4Way Ceiling Cassette 14.5kW -1ea

Ceiling concealed Duct 7.3kW-2ea
Wall Mounted 2.3kW-4ea

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

CF value of indoor unit (unit : kg)

Capacity(Btu/h(kW))

5k 7k 9k 12k 15k 18k 24k 28k 36k 42k 48k 76k 96k

Type

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

Ceiling Concealed Duct (Low Static)

- 0.17 0.17 0.17 0.17 0.37 0.37

------

Ceiling Concealed Duct (High Static)

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

Wall Mounted

- 0.24 0.24 0.24 0.24 0.28 0.28

------

1Way Ceiling Cassette

- 0.20 0.20 0.20 - 0.29 0.29

------

2Way Ceiling Cassette

-----

0.16 0.16 ------

4Way Ceiling Cassette

0.18 0.18 0.25 0.25 0.32 0.32 0.48 0.48 0.64 0.64 0.64 - -

ARTCOOL Gallery

- 0.10 0.10 0.10

---------

Floor Standing

- 0.17 0.17 0.17 0.17 0.37 0.37

------

Ceiling & Floor

- - 0.10 0.10

---------

Ceiling Suspended

-----

0.35 0.35 - 0.54 - 0.75 - -

Console

- 0.17 0.17 0.17 0.17

--------

Fresh Air Intake Unit

-

-

-

-

-

-

-

-

-

-

0.62

1.00

1.00

Heat recovery ventilator(DX)

-

-

-

0.20

-

0.20

0.20

-

-

-

-

-

-

Additional charge(kg)

=

+

+

Total liquid pipe

:Ø25.4 mm

Total liquid pipe

:Ø22.2 mm

Total liquid pipe

:Ø19.05 mm

+

+

+

+

+

Total liquid pipe

:Ø15.88 mm

Total liquid pipe

:Ø12.7 mm

Total liquid pipe

:Ø9.52 mm

Total liquid pipe

:Ø6.35 mm

CF value of indoor unit

Installation Manual 43

Pipe connections between indoor and outdoor unit

WARNING

▶ Regulation for refrigerant leakage

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

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

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

1. Installation of effective opening part

2. Reconfirmation of Outdoor Unit capacity and piping length

3. Reduction of the amount of refrigerant

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

- Change Indoor Unit type
: installation position should be over 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

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

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

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

-

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

Liquid pipe

Gas pipe

Common pipe

Ⓐ Manifold Gauge

Ⓑ Low pressure side Handle

Ⓒ High pressure side Handle

Refrigerant Bottling

WARNING

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

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

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

44 Outdoor Unit

Pipe connections between indoor and outdoor unit

1. Line Distribution

2. Vertical Distribution

Ensure that the branch pipes are attached vertically.

3. The others

Header

Slave

Master

Slave

Master

1st

1st

1st

Main pipe

Distribution

2nd

2nd

3rd

Slave

Master

Slave

Master

Slave

Master

Slave

Master

2nd

Main pipe

Distribution

Slave

Master

1st

3rd

3rd main pipe distribution

2nd

Distribution Method

Installation Manual 45

Pipe connections between indoor and outdoor unit

Branch pipe Fitting

Y branch

A

B

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°

A

Insulator

(included with kit)

Liquid and gas
pipe joints

Insulator for
field piping

Tape

(field supply)

A

B

Header

To outdoor unit

To indoor unit

A

B

C

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

• There is no limitation on the joint mounting configuration.

• If the diameter of the refrigerant piping selected by the procedures described is different from the size
of the joint, the connecting section should be cut with a pipe cutter.

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

• When the number of pipes to be connected is
smaller than the number of header branches,
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

46 Outdoor Unit

Pipe connections between indoor and outdoor unit

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

• 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.

B

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

Tape

Cap pipe

Insulator for cap pipe

Installation Manual 47

Pipe connections between indoor and outdoor unit

u Y branch pipe

Models Gas pipe Liquid pipe

ARBLN01621

ARBLN03321

ARBLN07121

ARBLN14521

ARBLN23220

I.D12.7

I.D15.88

I.D19.05

1

I.D25.4

3 1 2

1

2

O.D22.2

I.D34.9

3

O.D22.2

I.D.44.48

I.D.34.9

O.D.38.1

32

O.D15.88

O.D15.88

70

I.D28.58

I.D22.2

O.D19.05

70 80 110

I.D31.8

I.D28.58

I.D34.9

I.D31.8

120 90 120

I.D41.3

I.D38.1

I.D15.88

O.D38.1

I.D19.05

2

120 130

I.D12.7

3

O.D15.88

I.D.53.98

1

420
490

I.D31.8 I.D.53.98 I.D.25.4

I.D.28.58 O.D.44.48

X2

3 3

2

175

I.D12.7

3

O.D.22.2

70

I.D12.7

I.D12.7

281
292

I.D15.88

390
413

O.D25.4

O.D19.05

I.D19.05

2.22D.I85.82D.I

I.D19.05

376
404

O.D31.8

O.D19.05

1 3

I.D34.9

471
517

I.D41.3 I.D38.1

O.D34.9

3

90
O.D28.58

2

I.D.44.48

I.D38.1I.D41.3

2

I.D.44.48

O.D.28.58

X2

100

3

120

I.D19.05

I.D15.88

I.D34.9

I.D28.58

I.D38.1I.D41.3

I.D15.88

I.D22.2

I.D15.88

I.D22.2

I.D28.58I.D38.1

I.D22.2

3

115

I.D.15.88I.D.19.05

I.D15.88

I.D12.7

I.D22.2

I.D19.05

134

I.D12.7I.D19.05I.D15.88I.D19.05I.D22.2

2

I.D12.7

2

2

I.D.22.2

3

I.D25.4

3

I.D28.58

3

I.D41.3

I.D.6.35

I.D9.52

1

74

1

I.D12.7

70

83

I.D12.7

I.D15.88

96

125

I.D19.05

3 2

110 70

I.D15.88 I.D19.05

1

I.D22.2

I.D12.7

O.D15.88 I.D9.52

2 3 3

110 110

I.D25.4 I.D22.2

I.D.15.88

O.D.19.05 I.D.12.7

3 32

110 110

O.D9.52

346
379

X2

321
332

371
394

416
444

O.D19.05

80

I.D.9.52

281
292

I.D12.7

I.D9.52

I.D12.7

I.D9.52

I.D19.05

I.D15.88I.D12.7

I.D15.88 I.D19.05

O.D12.7I.D6.35

I.D19.05

I.D22.2

I.D15.88

I.D19.05

I.D22.2

O.D12.7 I.D6.35

I.D.25.4

I.D.19.05I.D.22.2

2

I.D.25.4

I.D.22.2

I.D.19.05

I.D9.52

O.D12.7 I.D6.35

I.D9.52

I.D.6.35

I.D6.35

I.D12.7

I.D12.7

25.9D.I25.9D.I7.21D.O

I.D15.88

I.D12.7

I.D9.52

96

3

[unit:mm]

I.D6.35

74

53.6D.I25.9D.I

74

2

83

3

2

96

3

48 Outdoor Unit

Pipe connections between indoor and outdoor unit

u Header

[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

120

150

360

540

540

120

ID15.88

ID12.7

ID12.7

ID15.88

ID15.88

ID19.05

120

120

150

360

ID9.52

ID9.52

ID6.35

ID6.35

ID9.52

ID12.7

120

150

400

160

ID15.88

ID12.7

ID19.05

ID15.88

ID22.2

ID28.58 ID25.4

120

120

150

360

ID9.52

ID9.52

ID6.35

ID6.35

ID9.52

ID12.7

120

150

120

ID15.88

ID12.7

ID15.88

ID12.7

ID15.88

ID19.05

120

150

120

ID6.35

ID9.52

ID9.52

ID12.7

120

150

160

580

ID19.05

ID15.88

ID15.88

ID12.7

ID22.2ID28.58 ID25.4

120

150

700

120

ID6.35

ID9.52

ID9.52

ID6.35

ID9.52ID12.7

120

150

160

760

ID19.05

ID15.88

ID15.88

ID12.7

ID22.2ID28.58 ID25.4

120

150

120

720

ID6.35

ID9.52

ID9.52

ID6.35

ID12.7

ID9.52

120

150

107

60*9=540

700

ID6.35

ID9.52

ID19.05ID15.88

ID9.52

ID6.35

120

150

182

775

ID19.05

ID15.88

ID15.88

ID12.7

ID28.58

ID31.8 ID34.9

Installation Manual 49

Pipe connections between indoor and outdoor unit

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.

Note:

If the ambient temperature differs between the time when pressure is applied and when the pressure drop is
checked, apply the following correction factor

There is a pressure change of approximately 0.1 kg/cm

2

(0.01 MPa) for each 1°C of temperature difference.

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

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

24 hour later: 3.73 MPa, 20°C
In this case the pressure drop of 0.07 is because of temperature drop
And hence there is no leakage in pipe occurred.

Caution:

To prevent the nitrogen from entering the refrigeration system in the liquid state, the top of the cylinder must
be at higher position than the bottom when you pressurize the system.

Usually the cylinder is used in a vertical standing position.

Nitrogen gas
cylinder

Slave 1 outdoor unit Master outdoor unit

Close

Close

Close

Close

Close

Close

Liquide pipe

Gas pipe

Liquid side

Gas side

Indoor unit

Nitrogen gas
cylinder

common pipe

Liquide pipe

High/low pressure

Gas pipe

common pipe

High/low pressure

50 Outdoor Unit

Pipe connections between indoor and outdoor unit

(2) Vacuum

Vacuum drying should be made from the service port provided on the outdoor unitʼs service valve to the
vacuum pump commonly used for liquid pipe, gas pipe and high/low pressure common pipe. (Make
Vacuum from liquid pipe, gas pipe and high/low pressure common pipe with the service valve closed.)
* Never perform air purging using refrigerant.

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

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

When installing and moving the air conditioner to another site, recharge after perfect evacuation.

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

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

Too much or too little refrigerant will cause trouble.
To use the Vacuum Mode
(If the Vacuum mode is set, all valves of Indoor units and Outdoor units will be opened.)

Slave 1 outdoor unit Master outdoor unit

Vacuum
pump

Close

Close

Close

Close

Close

Close

Vacuum
pump

Scale
Use a graviometer. (One that can measure
down to 0.1kg). If you are unable to prepare
such a high-precision gravimeter you may
use a charge cylinder.

common pipe

Liquide pipe

High/low pressure

Gas pipe

common pipe

High/low pressure

Liquide pipe

Gas pipe

Liquid side

Gas side

Indoor unit

Installation Manual 51

Pipe connections between indoor and outdoor unit

Vacuum Mode

This function is used for creating vacuum in the system after compressor replacement, ODU parts
replacement or IDU addition/replacement.

Master unit PCB DIP switch on

- Heat pump : switch on 11,14

- Cooling only : switch on 10,12,13

Vacuum mode setting

ODU V/V OPEN

Main EEV, SC EEV OPEN

IDU EEV OPEN

ODU power reset

Press the black button Main PCB (5 sec.)

Vacuum mode setting method Vacuum mode cancellation method

Master unit PCB DIP switch off

- Heat pump : switch off 11,14

- Cooling only : switch off 10,12,13

Power reset

Vacuum mode cancellation

CAUTION

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

52 Outdoor Unit

Pipe connections between indoor and outdoor unit

Thermal insulation of refrigerant piping

Heat

insulation

material

Outer

covering

Adhesive + Heat - resistant polyethylene foam +
Adhesive tape

Indoor Vinyl tape
Floor exposed

Water-proof hemp cloth + Bronze asphalt

Outdoor

Water-proof hemp cloth + Zinc plate + Oily paint

Note:
When using polyethylene cover as covering material, asphalt 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

C

D

E

A

B

C

D

E

Transmission lines

F

Liquid pipe

Transmission lines

Transmission lines

Separation

Gas pipe

Power lines
Insulating material

A

B

C

D

E

A

A

B

F

Heat insulation material

Pipe

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

Power lines

E

D

D

B

A

C

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

A

B

D

F

G

B

G

D

B

H

I

J

A

E

B

I

A

B

D

C

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.)

Installation Manual 53

Electrical Wiring

Electrical Wiring

Caution

Remote
control

Remote
control

Remote
control

Remote
control

Indoor

Unit

Outdoor Unit

Outdoor Unit

Outdoor Unit

Outdoor Unit

Indoor

Unit

Remote
control

Remote
control

Indoor

Unit

Indoor

Unit

Remote
control

Remote
control

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

CAUTION

Be sure to correct the outdoor unit to earth. Do not connect earth line to any gas pipe, liquid pipe,
lightening rod or telephone earth line. If earth is incomplete, it may cause an electric shock.

WARNING

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

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

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

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

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

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

6. Use 2-core shield cable for transmission line.(O mark in the figure below) If transmission lines of different
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 transmission line specified should be connected to the terminal block for Outdoor Unit transmission.

2-Core Shield Cable Multi-Core Cable

54 Outdoor Unit

Electrical Wiring

Master Slave1 Slave2

Master Slave1 Slave2

Master Slave1 Slave2

Master Slave1 Slave2

Remote
controller

Remote
controller

Indoor

Unit

Indoor

Unit

Remote
controller

Outdoor Unit

Outdoor Unit

Outdoor Unit

Outdoor Unit

Remote
controller

Indoor

Unit

Indoor

Unit

Remote
controller

Remote
controller

Indoor

Unit

Indoor

Unit

Remote
controller

Remote
controller

Indoor

Unit

Indoor

Unit

2-Core Shield Cable Multi-Core Cable

CAUTION

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

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

• Never use multi-core cable

• As this unit is equipped with an inverter, to install a phase leading capacitor not only will
deteriorate power factor improvement effect, but also may cause capacitor abnormal heating.
Therefore, never install a phase leading capacitor.

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

When none are available, follow the instructions below.

• Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power wiring
may cause abnormal heat.)

• 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.

u Precautions when laying power wiring

Round pressure terminal

Power wire

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

CAUTION

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

Installation Manual 55

Electrical Wiring

Control box and connecting position of wiring

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

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

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

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

- When connecting transmission line between outdoor unit and indoor units
with shielded wire, connect the shield ground to the earth screw.

WARNING

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

- Provide an appropriate cover to intercept direct sunlight.

Front Panel

UX3

Main PCB

Inverter fan PCB

Noise filter

Reactor
Bridge diode

Magnet switch

Inverter PCB

Take care of the phase
sequence of 3-phase 4-wire
power system

UX2

Main PCB

Inverter fan PCB

Noise filter

Reactor
Bridge diode

Magnet switch

Inverter PCB

Take care of the phase
sequence of 3-phase 4-wire
power system

UX1

Main PCB

Reactor
Inverter fan PCB

Noise filter

Bridge diode

Inverter PCB

Take care of the phase
sequence of 3-phase 4-wire
power system

56 Outdoor Unit

Electrical Wiring

Transmission and Power Lines

1) Transmission cable

• Types : shielding wire

• Cross section : 1.0~1.5mm

2

• Maximum allowable temperature: 60°C

• Maximum allowable line length: under 1000m

2) Remote control cable

• Types : 3-core cable

3) Central control cable

4) Separation of transmission and power lines

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

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

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

apparatus must be carried out by a qualified person.

Product type Wire type Diameter

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

2

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

2

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

2

Installation Manual 57

Wiring of main power supply and equipment capacity

Electrical Wiring

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

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

58 Outdoor Unit

Electrical Wiring

Field Wiring

1. 50Hz

u Example Connection of Communication Cable

n 1 Outdoor Unit-3Ø, 380-415V

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.

R S T N

Switch

Fuse

L

N

Communication Line

(2 Wires Cable)

Power Line

(4 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Outdoor Unit]

[Indoor Units]

3 Phase 4 Wires

Power supply

50Hz 380-415V

Power supply
1 Phase 50Hz

220-240V

(Main Switch)

Pull Box
(Installer option)

Pull Box
(Installer option)

Pull Box
(Installer option)

Pull Box
(Installer option)

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

Between Indoor and Master Outdoor unit

B

SODU IDU INTERNET DRY1 DRY2 GND 12V

ABABA

Master
Outdoor Unit

34 34 34

Installation Manual 59

Electrical Wiring

n 2 Outdoor Units-3Ø, 380-415V

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

3 Phase 4 Wires

Power supply

50Hz 380-415V

(Main Switch)

Power supply
1 Phase 50Hz

220-240V

N

L

Pull Box
(Installer option)

Switch

Fuse

(4 Wires Cable)

Power Line

(2 Wires Cable)

R S T N

Power Line

Pull Box
(Installer option)

[Master]

Pull Box
(Installer option)

[Slave]

Pull Box
(Installer option)

Communication Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

■ When the power source is supplied to

Each outdoor unit individually.

3 Phase 4 Wires

Power supply

50Hz 380-415V

(Main Switch)

Power supply

1 Phase 50Hz

220-240V

N

L

(2 Wires Cable)

Switch

Fuse

Power Line

Power Line

(2 Wires Cable)

R S T N

(4 Wires Cable)

Pull Box
(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

Switch

Fuse

Power Line

(2 Wires Cable)

[Indoor Units]

R S T N

Pull Box
(Installer option)

(2 Wires Cable)

Power Line

[Master]

Power Line

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

[Slave]

Pull Box
(Installer option)

Power Line

(2 Wires Cable)

[Indoor Units]

Communication Line

Pull Box
(Installer option)

Power Line

(2 Wires Cable)

(2 Wires Cable)

60 Outdoor Unit

Electrical Wiring

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).

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

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

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the
product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.

Between Indoor and Master Outdoor unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

Master
Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

Master
Outdoor Unit

34 34 34

The GND terminal at the main PCB is a ‘-’ terminal for dry contact.
It is not the point to make ground connection.

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

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

Slave
Outdoor Unit

Installation Manual 61

Electrical Wiring

n 3 Outdoor Units-3Ø, 380-415V

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

3 Phase 4 Wires

Power supply

50Hz 380-415V

(Main Switch)

Power supply

1 Phase 50Hz

220-240V

N

L

Pull Box
(Installer option)

Switch

Fuse

(4 Wires Cable)

Power Line

(2 Wires Cable)

R S T N

Power Line

Pull Box
(Installer option)

[Master]

Pull Box
(Installer option)

[Slave1] [Slave2]

Pull Box
(Installer option)

Communication Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

■ When the power source is supplied to
Each outdoor unit individually.

3 Phase 4 Wires

Power supply

50Hz 380-415V

(Main Switch)

Power supply

1 Phase 50Hz

220-240V

N

L

(2 Wires Cable)

Switch

Power Line

(2 Wires Cable)

R S T N

Fuse

Power Line

(4 Wires Cable)

Pull Box
(Installer option)

Power Line

(2 Wires Cable)

Power Line

Communication Line

(3 Wires Cable)

Switch

Fuse

(2 Wires Cable)

[Indoor Units]

R S T N

Pull Box
(Installer option)

(2 Wires Cable)

Power Line

R S T N

Switch

Fuse

Power Line

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

Pull Box
(Installer option)

Power Line

(2 Wires Cable)

[Indoor Units]

[Slave1] [Slave2]

Pull Box
(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

62 Outdoor Unit

Electrical Wiring

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).

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

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

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the
product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.

Between Indoor and Master Outdoor unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

Master
Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

Master
Outdoor Unit

34 34 34

The GND terminal at the main PCB is a ‘-’
terminal for dry contact.
It is not the point to make ground
connection.

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

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

SODU IDU INTERNET DRY1 DRY2 GND 12V

ABABA

B

Slave1
Outdoor Unit

Slave2
Outdoor Unit

Installation Manual 63

Electrical Wiring

n 4 Outdoor Units - 3Ø, 380-415V

n When the power source is connected In series between the units.

n When the power source is supplied to Each outdoor unit individually.

R S T N

Switch

Fuse

L

N

Communication Line

(2 Wires Cable)

Power Line

(4 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

3 Phase 4 Wires

Power supply

50Hz 380-415V

Power supply
1 Phase 50Hz

220-240V

(Main Switch)

[Slave1] [Slave2] [Slave3]

Pull Box
(Installer option)

Pull Box
(Installer option)

Pull Box
(Installer option)

Pull Box
(Installer option)

R S T N

Switch

Fuse

L

N

Communication Line

(2 Wires Cable)

Power Line

(4 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

3 Phase 4 Wires

Power supply

50Hz 380-415V

Power supply

1 Phase 50Hz

220-240V

(Main Switch)

[Slave1] [Slave2] [Slave3]

R S T N

Switch

Fuse

R S T N

Switch

Fuse

R S T N

Switch

Fuse

Pull Box
(Installer option)

Pull Box
(Installer option)

Pull Box
(Installer option)

Pull Box
(Installer option)

WARNING

When the total capacity is over than as follow, the power source do not use in series between the units.
The First terminal block could be burnt out. (Heat Pump : 68 Hp, Cooling Only : 62 Hp)

64 Outdoor Unit

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).

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

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

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product
is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.

Electrical Wiring

Between Indoor and Master Outdoor unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

Master
Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

Master
Outdoor Unit

34 34 34

The GND terminal at the main PCB is a ‘-’
terminal for dry contact.
It is not the point to make ground
connection.

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

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

SODU IDU INTERNET DRY1 DRY2 GND 12V

ABABA

B

SODU IDU INTERNET DRY1 DRY2 GND 12V

ABABA

B

Slave1
Outdoor Unit

Slave2
Outdoor Unit

Slave3
Outdoor Unit

Installation Manual 65

2. 60Hz

u Example Connection of Communication Cable

n 1 Outdoor Unit - 3Ø, 380V

R S T N

Switch

Fuse

L

N

Communication Line

(2 Wires Cable)

Power Line

(4 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Outdoor Unit]

[Indoor Units]

3 Phase 4 Wires

Power supply

60Hz 380V

Power supply

1 Phase 60Hz

220V

(Main Switch)

Pull Box
(Installer option)

Pull Box
(Installer option)

Pull Box
(Installer option)

Pull Box
(Installer option)

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

Between Indoor and Master Outdoor unit

B

SODU IDU INTERNET DRY1 DRY2 GND 12V

ABABA

Master
Outdoor Unit

34 34 34

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).

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

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

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the
product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.

Electrical Wiring

66 Outdoor Unit

n 2 Outdoor Units - 3Ø, 380V

n When the power source is connected In series between the units.

n When the power source is supplied to Each outdoor unit individually.

Electrical Wiring

3 Phase 4 Wires

Power supply

60Hz 380V

(Main Switch)

Power supply
1 Phase 60Hz

220V

N

L

Pull Box
(Installer option)

Switch

Fuse

Power Line

(2 Wires Cable)

R S T N

Power Line

(4 Wires Cable)

Pull Box
(Installer option)

[Master]

Pull Box
(Installer option)

[Slave]

Pull Box
(Installer option)

Communication Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

(2 Wires Cable)

[Indoor Units]

3 Phase 4 Wires

Power supply

60Hz 380V

(Main Switch)

Power supply
1 Phase 60Hz

220V

N

L

Switch

Fuse

Power Line

(2 Wires Cable)

R S T N

Power Line

(4 Wires Cable)

Pull Box
(Installer option)

Power Line

(2 Wires Cable)

Switch

Fuse

R S T N

Pull Box
(Installer option)

Power Line

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

[Master]

Power Line

(2 Wires Cable)

[Slave]

Pull Box
(Installer option)

Power Line

(2 Wires Cable)

[Indoor Units]

Communication Line

(2 Wires Cable)

Pull Box
(Installer option)

Power Line

(2 Wires Cable)

Installation Manual 67

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).

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

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

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the
product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.

Electrical Wiring

Between Indoor and Master Outdoor unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

Master
Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

Master
Outdoor Unit

34 34 34

The GND terminal at the main PCB is a ‘-’ terminal for dry contact.
It is not the point to make ground connection.

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

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

Slave
Outdoor Unit

68 Outdoor Unit

n 3 Outdoor Units - 3Ø, 380V

n When the power source is connected In series between the units.

n When the power source is supplied to Each outdoor unit individually.

Electrical Wiring

3 Phase 4 Wires

Power supply

60Hz 380V

(Main Switch)

Power supply
1 Phase 60Hz

220V

N

L

Pull Box
(Installer option)

Switch

Fuse

(4 Wires Cable)

Power Line

(2 Wires Cable)

R S T N

Power Line

Pull Box
(Installer option)

[Master]

Pull Box
(Installer option)

[Slave1] [Slave2]

Pull Box
(Installer option)

Communication Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

[Indoor Units]

3 Phase 4 Wires

Power supply

60Hz 380V

(Main Switch)

Power supply
1 Phase 60Hz

220V

N

L

Switch

Fuse

Power Line

(2 Wires Cable)

(4 Wires Cable)

R S T N

Power Line

Pull Box
(Installer option)

Power Line

(2 Wires Cable)

Switch

Fuse

R S T N

Switch

Pull Box
(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(3 Wires Cable)

R S T N

Fuse

Power Line

(2 Wires Cable)

[Master]

Pull Box
(Installer option)

Power Line

(2 Wires Cable)

[Indoor Units]

[Slave1] [Slave2]

Pull Box
(Installer option)

Power Line

(2 Wires Cable)

Communication Line

(2 Wires Cable)

Installation Manual 69

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).

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

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

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the
product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.

Electrical Wiring

Between Indoor and Master Outdoor unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

Master
Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

Master
Outdoor Unit

34 34 34

The GND terminal at the main PCB is a ‘-’
terminal for dry contact.
It is not the point to make ground
connection.

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

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

SODU IDU INTERNET DRY1 DRY2 GND 12V

ABABA

B

Slave1
Outdoor Unit

Slave2
Outdoor Unit

70 Outdoor Unit

n 4 Outdoor Units - 3Ø, 380V

n When the power source is connected In series between the units.

n When the power source is supplied to Each outdoor unit individually.

R S T N

Switch

Fuse

L

N

Communication Line

(2 Wires Cable)

Power Line

(4 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

3 Phase 4 Wires

Power supply

60Hz 380V

Power supply

1 Phase 60Hz

220V

(Main Switch)

[Slave1] [Slave2] [Slave3]

Pull Box
(Installer option)

Pull Box
(Installer option)

Pull Box
(Installer option)

Pull Box
(Installer option)

R S T N

Switch

Fuse

L

N

Communication Line

(2 Wires Cable)

Power Line

(4 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

3 Phase 4 Wires

Power supply

60Hz 380V

Power supply

1 Phase 60Hz

220V

(Main Switch)

[Slave1] [Slave2] [Slave3]

R S T N

Switch

Fuse

R S T N

Switch

Fuse

R S T N

Switch

Fuse

Pull Box
(Installer option)

Pull Box
(Installer option)

Pull Box
(Installer option)

Pull Box
(Installer option)

Electrical Wiring

WARNING

When the total capacity is over than as follow, the power source do not use in series between the units.
The First terminal block could be burnt out. (Heat Pump : 68 Hp, Cooling Only : 62 Hp)

Installation Manual 71

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).

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

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

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product
is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.

Electrical Wiring

Between Indoor and Master Outdoor unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

Master
Outdoor Unit

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

Master
Outdoor Unit

34 34 34

The GND terminal at the main PCB is a ‘-’
terminal for dry contact.
It is not the point to make ground
connection.

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

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

SODU IDU INTERNET DRY1 DRY2 GND 12V

ABABA

B

SODU IDU INTERNET DRY1 DRY2 GND 12V

ABABA

B

Slave1
Outdoor Unit

Slave2
Outdoor Unit

Slave3
Outdoor Unit

72 Outdoor Unit

u Example Connection of Communication Cable

[BUS type] [STAR type]

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

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

Electrical Wiring

Installation Manual 73

u UX1 Chassis Wire Connection

Main Power Connection

Main Power Terminal Block

Main Power Terminal BlockMain Power Terminal BlockMain Power Terminal Block

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Left Side

Main Power Terminal BlockMain Power Terminal Block

Main Power Terminal Block

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Right Side

Over
50mm Gap

Communication line

Main Power Terminal BlockMain Power Terminal BlockMain Power Terminal Block

Ground Cable

Power/Ground lines

Main Power Terminal Block

Front Side 1

Insulation sleeves attachments

Ground Cable

Fix firmly not
to be displaced

Main Power Terminal BlockMain Power Terminal BlockMain Power Terminal Block

Main PCB Connection

ODU-ODU
Communication line

ODU-IDU
Communication
line

Ground Cable

Over 50mm Gap

Power/Ground lines

Communication line

Main Power Terminal BlockMain Power Terminal BlockMain Power Terminal Block

Front Side 2

Electrical Wiring

74 Outdoor Unit

u UX2 Chassis Wire Connection

Main Power Main Power
Terminal BlockTerminal Block

Main Power
Terminal Block

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Left Side

Ground Cable

Communication line

Power/Ground lines

Over 50mm Gap

Main Power
Terminal Block

Main Power Main Power
Terminal BlockTerminal Block

Main Power
Terminal Block

Right Side

Ground Cable

Communication line

Power/Ground lines

Over

50mm Gap

Main Power
Terminal Block

Main Power
Terminal Block

Main Power Main Power
Terminal BlockTerminal Block

Main Power
Terminal Block

Front Side 1

Main Power Main Power
Terminal BlockTerminal Block

Main Power
Terminal Block

Insulation sleeves attachments

Fix firmly not to be displaced

ODU-ODU
Communication line

Ground CableGround CableGround Cable

ODU-IDU
Communication line

ODU-ODU

ODU-ODU

Communication lineCommunication line

ODU-ODU
Communication line

Communication line

Power/Ground lines

Over 50mm Gap

Main Power

Main Power

Terminal BlockTerminal Block

Main Power
Terminal Block

Ground Cable

Front Side 2

Main PCB ConnectionMain Power Connection

Electrical Wiring

Installation Manual 75

Electrical Wiring

u UX3 Chassis Wire Connection

႖ဴఎၴఝ႖ဴఎၴఝ

Main Power Main Power
Terminal BlockTerminal Block

Main Power
Terminal Block

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Left Side

႖ဴఎၴఝ

Main Power
Terminal Block

Main Power Main Power
Terminal BlockTerminal Block

Main Power
Terminal Block

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Right Side

Main Power Main Power
Terminal BlockTerminal Block

Main Power
Terminal Block

Ground Cable

Power/Ground lines

Over

50mm Gap

Communication line

Front Side 1

:;<6

Insulation sleeves attachments

Ground Cable

Fix firmly not
to be displaced

Main Power Terminal Block

Main Power Terminal BlockMain Power Terminal Block

ODU-ODU
Communication line

ODU-ODUODU-ODU
Communication lineCommunication line

ODU-ODU
Communication line

ODU-IDU
Communication
line

Main Power
Terminal Block

Main Power Main Power
Terminal BlockTerminal Block

Main Power
Terminal Block

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Front Side 2

Main PCB ConnectionMain Power Connection

76 Outdoor Unit

Electrical Wiring

Location of setting dip switch

7 - Segment

SW02V
(Auto Addressing)

SW01B SW02B

Installation Manual 77

Electrical Wiring

DIP switch setting

n Checking according to dip switch setting

1. You can check the setting values of the Master outdoor unit from the 7 segment LED.
The dip switch setting should be changed when the power is OFF.

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

n Checking the setting of the Master unit

The number is sequentially appeared at the 7 segment in 5 seconds after applying the power. This
number represents the setting condition. (For example, represents R410A 30HP)
Master model code ‘ Slave1 model code ‘ Slave2 model code ‘ total capacity ‘ 2 ‘ 25 ‘ 153

1~255 : Master model code
1~255 : Slave 1 model code
1~255 : Slave 2 model code
1~255 : Slave 3 model code

6~80HP : HP number(sum of master capacity and slave capacity)
No display : cooling only 2 : heat pump
25 : normal
153 : Model Type(ARUNxxxN3)

Example) 30Hp, R410A

16 ’ 15 ’ 30 ’ 2 ’ 25 ’ 153

CAUTION

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

}

Refer to table code

Model Code

Model Code Unit (HP) Unit Ref.
11 6
12 8
13 10
14 12
15 14
16 16
17 18
18 20

Master &

Slave

R410A

78 Outdoor Unit

Electrical Wiring

n Setting the DIP switch

• Heat pump

• If you set the Dip switch when power is on, the changed setting will not be applied immediately.
The changed setting will be enabled only when Power is reset or by pressing Reset button.

CAUTION

1. ʻXʼ mark within the table means that the dip switch must be pulled down. If not, the function may not work properly.

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

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

when all indoor units are stopped.

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

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

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

Heating capacity up

●

IDU Fan RPM Control

●

Auto charging

● ● ● ⅹ ⅹ

Refrigerant Checking Function

● ● ● ⅹ ●

Integrated test operation function (Cooling)

● ● ⅹ ● ⅹ

Integrated test operation function (Heating)

● ● ⅹ ● ●

Inverter backup

●

Unit backup

●

Non-operation indoor unit EEV adjustment

ⅹ ⅹ ● ⅹ ⅹ

Indoor unit target subcooling/overheating adjustment

ⅹ ⅹ ⅹ ● ⅹ

Operation indoor unit EEV adjustment

ⅹ ● ● ⅹ ⅹ

Dry contact

● ● ⅹ

Snow removal fuction

● ⅹ

Forced defrost

ⅹ ●

Snow removal+Forced defrost

● ●

Forced overall defrost

● ●

Static pressure mode

ⅹ ⅹ ⅹ ● ⅹ

Nigh low noise operation (Cooling only)

● ⅹ ●

Night low noise operation (Cooling/Heating)

● ● ●

Pump down

● ⅹ

Pump out

● ●

Forced oil return operation

ⅹ ⅹ ● ⅹ

Vacuum mode

● ⅹ ⅹ ●

Only overall defrost

●

Selector Fan/ All OFF

ⅹ ⅹ ● ● ⅹ

ODU Address setting

● ⅹ ⅹ

Master unit

ⅹ ⅹ ⅹ

Slave 1 unit

● ⅹ ●

Slave 2 unit

ⅹ ● ●

Slave 3 unit

● ● ●

Function

ODU

setting

Electrical Wiring

Installation Manual 79

• Cooling only

• If you set the Dip switch when power is on, the changed setting will not be applied immediately.
The changed setting will be enabled only when Power is reset or by pressing Reset button.

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

Function

Auto charging

● ● ● ⅹ ⅹ

Refrigerant Checking Function

● ● ● ⅹ ●

Integrated test operation function (Cooling)

● ● ⅹ ● ⅹ

Inverter backup

●

Unit backup

●

Indoor unit target subcooling/overheating adjustment

ⅹ ⅹ ⅹ ● ⅹ

Dry contact

● ● ⅹ

Snow removal fuction

● ⅹ

Static pressure mode

ⅹ ⅹ ⅹ ● ⅹ

Nigh low noise operation (Cooling only)

● ⅹ ●

Pump down

● ⅹ

Forced oil return operation

ⅹ ⅹ ● ⅹ

Vacuum mode

● ⅹ ⅹ ●

ODU

setting

Master unit

ⅹ ⅹ ⅹ

Slave 1 unit

● ⅹ ●

Slave 2 unit

ⅹ ● ●

Slave 3 unit

● ● ●

CAUTION

1. ʻXʼ mark within the table means that the dip switch must be pulled down. If not, the function may not work properly.

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

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

when all indoor units are stopped.

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

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

80 Outdoor Unit

Electrical Wiring

Automatic Addressing

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

1) Wait for 3 minutes after supplying power.
(Master and Slave outdoor units, indoor units)

2) Press RED button of the outdoor units for 5
seconds. (H/P : SW0B, C/O : SW02V)

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

4) For completing addressing, 2~7 minutes are
required depending on numbers of connected
indoor units

5) Numbers of connected indoor units whose
addressing is completed are indicated for 30
seconds on 7-segment LED of the outdoor
unit PCB

6) After completing addressing, address of each
indoor unit is indicated on the wired remote
control display window. (CH01, CH02, CH03,
……, CH06 : Indicated as numbers of
connected indoor units)

CAUTION

• In replacement of the indoor unit PCB, always perform Auto addressing setting
again (At that time, please check about using Independent power module to any
indoor unit.)

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

• Auto addressing is only possible on the master Unit.

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

7 - Segment

SW02V
(Auto Addressing)

SW01B SW02B

Installation Manual 81

Electrical Wiring

u The Procedure of Automatic Addressing

Power On

Waiting 3 minutes

Press RED Button for 5 sec.
(H/P : SW0B, C/O : SW02V)

7-segment LED = 88

Don’t press RED Button

(H/P : SW0B, C/O : SW02V)

Waiting about 2~7 minutes

7-segment LED

= 88

YES

OK

NO Check the connections

Auto addressing start

• 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

of transmission line

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.

82 Outdoor Unit82 Outdoor Unit

Electrical Wiring

Group Number setting

Group Number setting for Indoor Units

① Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off.
② The transmission lines connected to INTERNET terminal should be connected to central control of Outdoor

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

③ Turn the whole system on.
④ Set the group and Indoor Unit number with a wired remote control.
⑤ To control several sets of Indoor Units into a group, set the group ID from 0 to F for this purpose.

Example) Group number setting

1

st

number indicate the group number

2

nd

number point out indoor unit number

Group recognizing the simple central controller
No.0 group (00~0F)
No.1 group (10~1F)
No.2 group (20~2F)
No.3 group (30~3F)
No.4 group (40~4F)
No.5 group (50~5F)
No.6 group (60~6F)
No.7 group (70~7F)
No.8 group (80~8F)
No.9 group (90~9F)
No. A group (A0~AF)
No. B group (B0~BF)
No. C group (C0~CF)
No. D group (D0~DF)
No. E group (E0~EF)
No. F group (F0~FF)

Outdoor Units

1 F

Indoor unitGroup

[Heat Pump] [Cooling Only]

SODU B SODU A IDU B IDU A INT B INT A

B(D) A(C) BA B(D) A(C) BA

SODU IDU INTERNET DRY1 DRY2 GND 12V

B

ABABA

Installation Manual 83

Electrical Wiring

Cool and Heater 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.

• Setting Main PCB Dip SW of Master Outdoor Unit.

GND

GND

GND

Without Cool/Heat Selector Installation and Connection

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

Connect signal terminal block as below figure and description.

- How to set mode without Cool/Heat Selector

• Cooling Mode Setting

¿‘GND Connection
¡‘Off (Open)

• Heating Mode Setting

¿‘ GND Connection
¡‘GND Connection

• Fan/ All OFF Mode Setting

¿‘ Off (Open)
¡‘GND Connection

¨≠

GND

¨

≠

GND

¨≠

GND

¨

≠

GND

❈ Communication line length can be maximum 300m, use communication line as thick as 1.25mm2.

Push Button

- Insert wire method -

GND

GND

¨≠

< Outdoor Main PCB >

shows field wiring

connected wiring

3

4

¨

≠

GND

GND

3

4

<Outdoor Dry Contact Back Side >

1

2

1

2

Push arrow direction.

Insert wire to connector.

84 Outdoor Unit

Functions of each Test run steps

(Use above LG MV 6.1 version if you want to issue integrated test run report)

Step 0. Verify the command signals

Select function to be executed during the test run

Step 1. Examine Sensor

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

Step 2. Refrigerant Automatic Recharge

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

Step 3. Automatic Refrigerant Decisions

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

Step 4. Integrated Test Run

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

Step 5. Real-time sensor checking

Check the sensors while operating in real-time.

h Gas pipes and Liquid pipes connections inspection

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

Test Run

Test Run

1

2

3

4

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

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

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

would be broken.
Immediately after mounting the unit or after leaving it turned off for an extended length of time,
the resistance of the insulation between the power supply terminal board and the ground may
decrease to approx. 2 MΩ as a result of refrigerant accumulating in the internal compressor.
If the insulation resistance is less than 2 MΩ, turning on the main power supply and energizing
the crankcase heater for more than 6 hours will cause the refrigerant to evaporate, increasing
the insulation resistance.

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

NOTE: Be sure to tighten caps.

Check if there are any problems in automatic addressing or not:
Check and confirm that there are no error messages in the display of indoor units or remote controls
and LED in outdoor units.

Checks Before Test Run

CAUTION
when cutting main power of the Multi V

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

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

Installation Manual 85

Test Run

How to Cope with Test Run Abnormality

The phenomena from main 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

R-S-T misconnection

Motor failure,
bad ventilation around
outdoor heat exchanger

Bad connector contact

Coil failure

EEV clogged

EEV clogged

Check resistance between terminals and
chassis

Change strainer

Check oil amount after opening oil port

Check resistance between terminals and
chassis

Check compressor R-S-T connection

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

Check connector

Check resistance between terminals

Service necessary

Service necessary

Component Phenomenon Cause Check method and Trouble shooting

86 Outdoor Unit

Test Run

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

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

WARNING

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

2. Error may occur when the sensor is normal according to the installed location and the temperature
conditions. When error occurs, please check each sensor and decide faultiness.

DIP Switch Settings

Warning : Please reset Main PCB before starting this function

- Setting1

(Refrigerant Auto Recharge)

- Setting2

(Refrigerant Quantity Auto Decide)

- Setting3

(Integrated Test Run - cooling)

- Setting4

(Integrated Test Run - heating)

Sensor Checking Function

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

Note 1)

, 2 outdoor pressure sensors.

UX1 UX2(1 Comp) UX2 UX3 (2 Comp) UX3

Cooling Only 66778

Heat Pump - 7 8 8 9

Start

3 minutes

past after power

reset

NO

YES

DIP switch set

Setting 1 Setting 2 Setting 3 Setting 4

Note 3)

YES

NO

Press black button for

5 seconds

Press black button

for 2 seconds

Sensor Normal

NO

Setting 1 Setting 2 Setting 3 Setting 4

Display Error

Press black button for 2 seconds

End

All DIP switches OFF and press black

button for 2 seconds

Data Reset and Wait

Refrigerant

Auto Recharge

Refrigerant

Auto decide

Start Inspection of each Function

E: Cooling
F: Heating

Installation Manual 87

Test Run

Sensor Check Error Code Display

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

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

Indoor sensor error :

319

Outdoor sensor error :

309

Displaying error content

* 5 number of errors is displayed
continuously and repeatedly.

Displaying error content

■ Indoor unit error display

1.1st and 2nd number represents indoor unit number.

2. Last number represents sensor.

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

■ Displaying outdoor unit error

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

2.Last number represents outdoor unit number.

1 : Master
2 : Slave 1
3 : Slave 2
4 : Slave 3
* Indoor unit number follows auto addressing number.
(To check the LGMV Data)

ex) Indoor unit No. 2 Pipe inlet temperature sensor

error

ex) Outdoor Master Unit Liquid pipe temperature

sensor error

No. Sensor type

1 Outdoor Air Temperature
2 Heat Exchanger Temperature
5 Liquid Pipe Temperature
6 SC pipe out
7 Suction Temperature
8 Inverter Comp. Discharge Temperature
9 Constant Comp.1 Discharge Temperature
10 Constant Comp.2 Discharge Temperature
11 High Pressure
12 Low Pressure
14 IPM temperature

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

ODU suction temperature sensor, Slave 3 high pressure
sensor error

Caution

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

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

.......

Table 1. ODU Sensor Error Code

No. Classification

1 Pipe In Temperature
2 Pipe Out Temperature
3 Indoor Air Temperature

Table 2. IDU Sensor Error Code

88 Outdoor Unit

Test Run

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.

Refrigerant Auto Charging (Setting 1)

DIP Switch Settings

Warning : Please reset Main PCB before starting this function

Note

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

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

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

Start

Wait for 3 min. after power reset

Set the Dip S/W.

(Refer to DIP S/W setting)

Press the black button.

(Press until ‘508’ is displayed)

Press the black button.

IDU runs with cooling mode In designated order.

Is it necessary to

charge refrigerant?

No

Yes

Press the black button

*1)

Refrigerant Auto
Charging Process

Main PCB
SW01V

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

Press the black button

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

Completed.

*2)

Installation Manual 89

Test Run

Gas Pipe

Liquid Pip

Liquid Pipe

CAUTION

1. Guaranteed temperature range (Error will occur if temperature is out of range)
IDU : 20°C(68°F) ~ 32°C(90°F)
ODU : 0°C(32°F) ~ 43°C (77°F)

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

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

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

n Error contents about auto refrigerant charging function

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

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

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

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

Liquid Pipe

Gas Pip

Gas Pipe

manifold

Capillary Assembly

Procedure

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

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

3. Connect manifold and Capillary tube.

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

4. Connect capillary and refrigerant vessel.

5. Purge hose and manifold.

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

90 Outdoor Unit

Test Run

Refrigerant Checking Function (Setting 2)

This function judges refrigerant leakage and overcharging

It can be used with refrigerant auto charging function.

DIP Switch Settings

Warning : Please reset Main PCB before starting this function

Inspection Start

Press black button for 2 seconds

YES

Proper Temperature

NO

Display Error

Too much

Refrigerant

Thermo off indoor unit

Decide Refrigerant Quantity

Based on Refrigerant Quantity

Not enough
Refrigerant

Cannot tell

Quantity

Indoor Unit OFF

YES

Refrigerant

Quantity

Normal

NO

Gas/Liquid
pipe direct
connection

Display Error

Press black button for 2 seconds

End

Press black button for 2 seconds

Data Reset and Wait

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.

Installation Manual 91

Test Run

[ Error contents about auto refrigerant charging function ]

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

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

How to Cope with Result of Refrigerant checking

1. If the temperature is not in guaranteed Temperature range, the system will not execute Refrigerant
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 ~ 35 °C
ODU : 0 ~ 43 °C

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

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

92 Outdoor Unit

Integrated Test Running Function_Cooling Mode (Setting 3)

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

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

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

• Saved data can check using LGMV.

Note

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

Test Run

DIP Switch Settings

Warning : Please reset Main PCB before starting this function

Start

Press the black button for 2 sec

All IDU operation on

Cooling mode

Temp. Condition

Yes

Thermo off

IDU judge

No

Yes

Refrigerant amount judge
during all IDU operation
data on Test Runing(15min)

1 IDU operation

Note 1

1 IDU operation data

(10min)

Error Display

Error Display

Press the black button for 2 sec

End

Press the black button for 2 sec.
after turning off all of Dip switch.

Completed

Installation Manual 93

Test Run

Integrated Test Running Function_Heating Mode (Setting 4)

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

•

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

mode.

•

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

• Saved data can check using LGMV.

Note

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

DIP Switch Settings

Warning : Please reset Main PCB before starting this function

Start

Press the black button for 2 sec.

Temp. Condition

Yes

Error Display

Note 1

All IDU operation data(10min)

(All-1) IDU operation

1 IDU operation

Oil return operation

System off

No

Press the black button for 2 sec.
after turning off all of Dip switch.

Error Display

End

Completed

94 Outdoor Unit

[ 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 ~ 35 °C
ODU : 0 ~ 43 °C

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

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

Test Run

Installation Manual 95

Test Run

Night Low Noise Function

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

Max. RPM setting method

Example of Max. RPM Setting

Setting Method for Fan Max. RPM

CAUTION

1. Request installer to set the function during installation.

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

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

Reset the power

Setting the Fan Max. RPM

Setting Complete

Set the DIP S/W

Note 1)

DIP Switch Settings

[Heater Pump] [Cooling only]

Warning : Please reset Main PCB before starting this function

Step Black Button Red Button

1 1 time 1 time
2 2 time 1 time
3 3 time 1 time
4 4 time 1 time
5 5 time 1 time
6 6 time 1 time
7 7 time 1 time
8 8 time 1 time
9 9 time 1 time

RPM / Time Settings

Heat Pump
Cooling Only

Step

1

2

3

4

5

6

7

8

9

Noise

Heat Pump

Cooling Only

Step

Standard

Capacity

23~35kW

16kW

16~23kW

Fan Maximum RPM

730

620

510 620 780

16kW

16~23kW

41~58kW

29~41kW

46~58kW

900

790

680 800

Capacity

23~35kW
29~41kW

Noise(dB)

56 58 62

53 55 59

50 52 56

47 49 53

Judgment

Operation

Time(Hr)

Time(Hr)

8

9

6.5 10.5

512

8

9

6.5 10.5

512

8

9

6.5 10.5

5

12

41~58kW
46~58kW

96 Outdoor Unit

This function is used for creating vacuum in the system after compressor replacement, ODU parts
replacement or IDU addition/replacement.

Vacuum Mode

Test Run

Set the DIP S/W ON

Vacuum mode setting

ODU V/V OPEN

Main EEV, SC EEV OPEN

IDU EEV OPEN

ODU power reset

Press the black button Main PCB (5 sec.)

Vacuum mode setting method Vacuum mode cancellation method

Set the DIP S/W OFF

Power reset

Vacuum mode cancellation

CAUTION

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

DIP Switch Settings

Warning : Please reset Main PCB before starting this function

Installation Manual 97

Test Run

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

discharge of ODU.

n Static pressure compensation dip S/W setting method

High static pressure mode : Set DIP S/W

Static pressure compensation mode

Power Reset

Set the DIP S/W ON

Static pressure compensation mode setting

method

Static pressure compensation mode cancellation

method

DIP switch OFF

Power Reset

Static pressure compensation mode is set

Static pressure compensation mode is cancelled

DIP Switch Settings

Warning : Please reset SVC (Heat Pump)/ Main PCB (Cooling only)before starting this function

98 Outdoor Unit

Self-Diagnosis Function

Error Indicator

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

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

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

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

Error Display

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

Ex) 211 : No.21 error of master unit

213 : No.21 error of slave2
011 ’ 051 : No.105 error of master unit

Display Title Cause of Error

Indoor unit related error

0 1 - Air temperature sensor of indoor unit Air temperature sensor of indoor unit is open or short

0 2 -

Inlet pipe temperature sensor of indoor
unit

Inlet pipe temperature sensor of indoor unit is open or
short

0 3 -

Communication error : wired remote
controller ÷ indoor unit

Failing to receive wired remote controller signal in indoor
unit PCB

0 4 - Drain pump Malfunction of drain pump

0 5 -

Communication error : outdoor unit ÷
indoor unit

Failing to receive outdoor unit signal in indoor unit PCB

0 6 -

Outlet pipe temperature sensor of indoor
unit

Outlet pipe temperature sensor of indoor unit is open or
short

0 9 - Indoor EEPROM Error

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

1 0 - Poor fan motor operation

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

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

Outdoor unit related error

2 1

1

Master Outdoor Unit Inverter Compressor
IPM Fault

Master Outdoor Unit Inverter Compressor Drive IPM Fault

2

Slave1 Outdoor Unit Inverter Compressor
IPM Fault

Slave1 Outdoor Unit Inverter Compressor Drive IPM Fault

3

Slave2 Outdoor Unit Inverter Compressor
IPM Fault

Slave2 Outdoor Unit Inverter Compressor Drive IPM Fault

4

Slave3 Outdoor Unit Inverter Compressor
IPM Fault

Slave3 Outdoor Unit Inverter Compressor Drive IPM Fault

2 2

1

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

Master Outdoor Unit Inverter Board Input Current excess
(RMS)

2

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

Slave1 Outdoor Unit Inverter Board Input Current excess
(RMS)

3

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

Slave2 Outdoor Unit Inverter Board Input Current excess
(RMS)

4

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

Slave3 Outdoor Unit Inverter Board Input Current excess
(RMS)

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

Test Run

Installation Manual 99

Test Run

DC charging is not performed at Master Outdoor Unit
after starting relay turn on.

DC charging is not performed at Slave1 Outdoor Unit
after starting relay turn on.

DC charging is not performed at Slave2 Outdoor Unit
after starting relay turn on.

DC charging is not performed at Slave3 Outdoor Unit
after starting relay turn on.

System is turned off by Master Outdoor Unit high
pressure switch.

System is turned off by slave1 Outdoor Unit high
pressure switch.

System is turned off by slave2 Outdoor Unit high
pressure switch.

System is turned off by slave3 Outdoor Unit high
pressure switch.

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

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

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

Slave3 Outdoor Unit input voltage is over 487V or
below 270V

The First Start Failure by Master Outdoor Unit
Inverter Compressor Abnormality

The First Start Failure by Slave1 Outdoor Unit
Inverter Compressor Abnormality

The First Start Failure by Slave2 Outdoor Unit
Inverter Compressor Abnormality

The First Start Failure by Slave3 Outdoor Unit
Inverter Compressor Abnormality

System is turned off by Master Outdoor Unit DC
Voltage Over Charging

System is turned off by Slave1 Outdoor Unit DC
Voltage Over Charging

System is turned off by Slave2 Outdoor Unit DC
Voltage Over Charging

System is turned off by Slave3 Outdoor Unit DC
Voltage Over Charging

Master Outdoor Unit Inverter Compressor Fault OR
Drive Fault

Slave1 Outdoor Unit Inverter Compressor Fault OR
Drive Fault

Slave2 Outdoor Unit Inverter Compressor Fault OR
Drive Fault

Slave3 Outdoor Unit Inverter Compressor Fault OR
Drive Fault

Master Outdoor Unit Inverter
Compressor DC link Low Voltage

Slave1 Outdoor Unit Inverter
Compressor DC link Low Voltage

Slave2 Outdoor Unit Inverter
Compressor DC link Low Voltage

Slave3 Outdoor Unit Inverter
Compressor DC link Low Voltage

Master Outdoor Unit High
Pressure Switch

Slave1 Outdoor Unit High
Pressure Switch

Slave2 Outdoor Unit High
Pressure Switch

Slave3 Outdoor Unit High
Pressure Switch

Master Outdoor Unit Input Voltage
High/ Low Voltage

Slave1 Outdoor Unit Input Voltage
High/ Low Voltage

Slave2 Outdoor Unit Input Voltage
High/ Low Voltage

Slave3 Outdoor Unit Input Voltage
High/ Low Voltage

Master Outdoor Unit Inverter
Compressor Start Failure

Slave1 Outdoor Unit Inverter
Compressor Start Failure

Slave2 Outdoor Unit Inverter
Compressor Start Failure

Slave3 Outdoor Unit Inverter
Compressor Start Failure

Master Outdoor Unit Inverter DC
link High Voltage

Slave1 Outdoor Unit Inverter DC
link High Voltage

Slave2 Outdoor Unit Inverter DC
link High Voltage

Slave3 Outdoor Unit Inverter DC
link High Voltage

Master Outdoor Unit Inverter
Compressor Over Current

Slave1 Outdoor Unit Inverter
Compressor Over Current

Slave2 Outdoor Unit Inverter
Compressor Over Current

Slave3 Outdoor Unit Inverter
Compressor Over Current

Display Title Cause of Error

1

2

2 3

3

4

1

2

2 4

3

4

1

2

2 5

3

4

1

2

2 6

3

4

1

2

2 8

3

4

1

2

2 9

3

4

Outdoor unit related error

100 Outdoor Unit

System is turned off by excessive increase of high pressure of
Master Outdoor Unit

System is turned off by excessive increase of high pressure of
Slave1 Outdoor Unit

System is turned off by excessive increase of high pressure of
Slave2 Outdoor Unit

System is turned off by excessive increase of high pressure of
Slave3 Outdoor Unit

System is turned off by excessive decrease of low pressure of
Master Outdoor Unit

System is turned off by excessive decrease of low pressure of
Slave1 Outdoor Unit

System is turned off by excessive decrease of low pressure of
Slave2 Outdoor Unit

System is turned off by excessive decrease of low pressure of
Slave3 Outdoor Unit

Master Outdoor Unit stayed under low condensing limit for 3
minutes

Slave1 Outdoor Unit stayed under low condensing limit for 3
minutes

Slave2 Outdoor Unit stayed under low condensing limit for 3
minutes

Slave3 Outdoor Unit stayed under low condensing limit for 3
minutes

High Pressure of Master Outdoor Unit

High Pressure of Slave1 Outdoor Unit

High Pressure of Slave2 Outdoor Unit

High Pressure of Slave3 Outdoor Unit

Low Pressure of Master Outdoor Unit

Low Pressure of Slave1 Outdoor Unit

Low Pressure of Slave2 Outdoor Unit

Low Pressure of Slave3 Outdoor Unit

Master Outdoor Unit Low Condensing
Ratio Limited

Slave1 Outdoor Unit Low Condensing
Ratio Limited

Slave2 Outdoor Unit Low Condensing
Ratio Limited

Slave3 Outdoor Unit Low Condensing
Ratio Limited

1

2

3 4

3

4

1

2

3 5

3

4

1

2

3 6

3

4

System is turned off by Master Outdoor Uunit Constant Speed
Compressor2 High Discharge Temperature

System is turned off by Slave1 Outdoor Unit Constant Speed
Compressor2 High Discharge Temperature

System is turned off by Slave2 Outdoor Unit Constant Speed
Compressor2 High Discharge Temperature

System is turned off by Slave3 Outdoor Unit Constant Speed
Compressor2 High Discharge Temperature

System is turned off by Master Outdoor Unit Inverter Compressor
High Discharge Temperature

System is turned off by Slave1 Outdoor Unit Inverter Compressor
High Discharge Temperature

System is turned off by Slave2 Outdoor Unit Inverter Compressor
High Discharge Temperature

System is turned off by Slave3 Outdoor Unit Inverter Compressor
High Discharge Temperature

System is turned off by Master Outdoor Uunit Constant Speed
Compressor1 High Discharge Temperature

System is turned off by Slave1 Outdoor Unit Constant Speed
Compressor1 High Discharge Temperature

System is turned off by Slave2 Outdoor Unit Constant Speed
Compressor1 High Discharge Temperature

System is turned off by Slave3 Outdoor Unit Constant Speed
Compressor1 High Discharge Temperature

Master Outdoor Unit Constant Speed
Compressor2 High Discharge Temperature

Slave1 Outdoor Unit Constant Speed
Compressor2 High Discharge Temperature

Slave2 Outdoor Unit Constant Speed
Compressor2 High Discharge Temperature

Slave3 Outdoor Unit Constant Speed
Compressor2 High Discharge Temperature

Master Outdoor Unit Inverter Compressor
High Discharge Temperature

Slave1 Outdoor Unit Inverter Compressor
High Discharge Temperature

Slave2 Outdoor Unit Inverter Compressor
Discharge High Temperature

Slave3 Outdoor Unit Inverter Compressor
High Discharge Temperature

Master Outdoor Unit Constant Speed
Compressor1 High Discharge Temperature

Slave1 Outdoor Unit Constant Speed
Compressor1 High Discharge Temperature

Slave2 Outdoor Unit Constant Speed
Compressor1 High Discharge Temperature

Slave3 Outdoor Unit Constant Speed
Compressor1 High Discharge Temperature

Display Title Cause of Error

1

2

3 0

3

4

1

2

3 2

3

4

1

2

3 3

3

4

Outdoor unit related error

Test Run