AirStage ARXK18GALH, ARXK12GALH, ARXK14GALH, ARXK09GALH, ARXK24GALH Installation Manual

TM

INSTALLATION MANUAL

ARXK07GALH
ARXK09GALH
ARXK12GALH
ARXK14GALH
ARXK18GALH
ARXK24GALH
(Without drain pump)

INDOOR UNIT (Duct type)

For authorized service personnel only.

INSTALLATIONSANLEITUNG

INNENGERÄT (Kanaltyp)

Nur für autorisiertes Fachpersonal.

MANUEL D’INSTALLATION

UNITÉ INTÉRIEURE (type conduit)

Pour le personnel agréé uniquement.

MANUAL DE INSTALACIÓN

UNIDAD INTERIOR (Tipo conducto)

Únicamente para personal de servicio autorizado.

MANUALE DI INSTALLAZIONE

UNITÀ INTERNA (tipo a condotto)

A uso esclusivo del personale tecnico autorizzato.

English

Deutsch

FrançaisEspañol

Italiano

ARXK07GCLH
ARXK09GCLH
ARXK12GCLH
ARXK14GCLH
ARXK18GCLH
ARXK24GCLH
(With drain pump)

ΕΓΧΕΙΡΙΔΙΟ ΕΓΚΑΤΑΣΤΑΣΗΣ

ΕΣΩΤΕΡΙΚΗ ΜΟΝΑΔΑ (Τύπος αγωγού)

Μόνο για εξουσιοδοτημένο τεχνικό προσωπικό.

MANUAL DE INSTALAÇÃO

UNIDADE INTERIOR (Tipo de tubagem)

Apenas para técnicos autorizados.

РУКОВОДСТВО ПО УСТАНОВКЕ

ВНУТРЕННИЙ МОДУЛЬ (Короб)

Только для авторизованного обслуживающего персонала.

MONTAJ KILAVUZU

İÇ ÜNİTE (Kanal tipi)

Yalnızca yetkili servis personeli için.

Refer to the rating label with the serial number.

MADE IN P.R.C.

ΕλληνικάPortuguês

РусскийTürkçe

[Original instructions]

PART NO. 9381858019

INSTALLATION MANUAL

PART NO. 9381858019
VRF system indoor unit (Duct type)

Contents

1. SAFETY PRECAUTIONS .........................................................................................1

2. ABOUT THIS PRODUCT..........................................................................................1

2.1. Precautions for using the R410A refrigerant ......................................................1

2.2. Special tool for R410A ....................................................................................... 1

2.3. Accessories ....................................................................................................... 2

2.4. Optional parts ....................................................................................................2

3. INSTALLATION WORK ............................................................................................ 2

3.1. Selecting an installation location .......................................................................2

3.2. Installation dimensions .....................................................................................3

3.3. Installation the unit ............................................................................................ 3

PIPE INSTALLATION ...............................................................................................5

4.

4.1. Selecting the pipe material ................................................................................5

4.2. Pipe requirement ...............................................................................................5

4.3. Flare connection (Pipe connection) ................................................................... 6

4.4. Installing heat insulation ....................................................................................6

5. INSTALLING DRAIN PIPES .....................................................................................7

5.1A. ARXK**GCLH model .......................................................................................7

5.1B. ARXK**GALH model ....................................................................................... 7

5.2. Install the drain pipe ..........................................................................................7

6. ELECTRICAL WIRING .............................................................................................9

6.1. Electrical requirement ........................................................................................ 9

6.2. Wiring method .................................................................................................10

6.3. Unit wiring ........................................................................................................10

6.4. Connection of wiring ........................................................................................ 11

6.5. External input and external output (Optional parts) ......................................... 11

6.6. Remote sensor (Optional parts) ......................................................................13

6.7. IR receiver unit (Optional parts) ....................................................................... 14

6.8. Auto louver grille (Optional parts) .................................................................... 14

6.9. Optional parts cable binding ............................................................................ 14

7. FIELD SETTING ..................................................................................................... 15

7.1. Setting the address .......................................................................................... 15

7.2. Custom code setting ........................................................................................ 16

7.3. Static pressure mode ....................................................................................... 16

7.4. Switching of airfl ow direction louver function ...................................................16

7.5. Function setting ...............................................................................................17

8. TEST RUN ..............................................................................................................17

8.1. Test run using Outdoor unit (PCB) .................................................................. 17

8.2. Test run using Remote Controller ....................................................................17

9. CHECK LIST ...........................................................................................................17

10. ERROR CODES .....................................................................................................18

This mark indicates procedures which, if improperly performed,

CAUTION

Read carefully all security information before use or install the air conditioner.

Do not attempt to install the air conditioner or a part of the air conditioner by yourself.

This unit must be installed by qualified personnel with a capacity certificate for handling
refrigerant fluids. Refer to regulation and laws in use on installation place.

The installation must be carried out in compliance with regulations in force in the place of
installation and the installation instructions of the manufacturer.

This unit is part of a set constituting an air conditioner. It must not be installed alone or
with non-authorized by the manufacturer.

Always use a separate power supply line protected by a circuit breaker operating on all
wires with a distance between contact of 3mm for this unit.

The unit must be correctly grounded and the supply line must be equipped with a
differential breaker in order to protect the persons.

The units are not explosion proof and therefore should not be installed in explosive
atmosphere.

Never touch electrical components immediately after the power supply has been turned
off. Electric shock may occur. After turning off the power, always wait 5 minutes before
touching electrical components.

This unit contains no user-serviceable parts. Always consult authorized service
personnel to repairs.

When moving, consult authorized service personnel for disconnection and installation of
the unit.

might possibly result in personal harm to the user, or damage to
property.

2. ABOUT THIS PRODUCT

2.1. Precautions for using the R410A refrigerant

WARNING

Do not introduce any substance other than the prescribed refrigerant into the
refrigeration cycle.
If air enters the refrigeration cycle, the pressure in the refrigeration cycle will become
abnormally high and cause the piping to rupture.

If there is a refrigerant leakage, make sure that it does not exceed the concentration
limit.
If a refrigerant leakage exceeds the concentration limit, it can lead to accidents such as
oxygen starvation.

Do not touch refrigerant that has leaked from the refrigerant pipe connections or other
area. Touching the refrigerant directly can cause frostbite.

If a refrigerant leakage occurs during operation, immediately vacate the premises and
thoroughly ventilate the area.
If the refrigerant comes in contact with a fl ame, it produces a toxic gas.

1. SAFETY PRECAUTIONS

• Be sure to read this Manual thoroughly before installation.

• The warnings and precautions indicated in this Manual contain important information
pertaining to your safety. Be sure to observe them.

• Hand this Manual, together with the Operating Manual to the customer.

Request the customer to keep them on hand for future use, such as for relocating or

repairing the unit.

WARNING

Request your dealer or a professional installer to install the unit in accordance with this
Manual.
An improperly installed unit can cause serious accidents such as water leakage,
electric shock, or fi re.
If the unit is installed in disregard of the instructions in the Installation Manual, it will
void the manufacturer’s warranty.

Do not turn ON the power until all work has been completed.
Turning ON the power before the work is completed can cause serious accidents such
as electric shock or fi re.

If refrigerant leaks while work is being carried out, ventilate the area.
If the refrigerant comes in contact with a fl ame, it produces a toxic gas.

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

Except for EMERGENCY, never turn off main as well as sub breaker of the indoor units
during operation. It will cause compressor failure as well as water leakage.
First, stop the indoor unit by operating the control unit, converter or external input
device and then cut the breaker.
Make sure to operate through the control unit, converter or external input device.
When the breaker is designed, locate it at a place where the users cannot start and
stop in the daily work.

This mark indicates procedures which, if improperly performed,
might lead to the death or serious injury of the user.

2.2. Special tool for R410A

WARNING

To install a unit that uses the R410A refrigerant, use dedicated tools and piping
materials that have been manufactured specifi cally for R410A use.
Because the pressure of the R410A refrigerant is approximately 1.6 times higher than
the R22, failure to use dedicated piping material or improper installation can cause
rupture or injury.
Furthermore, it can cause serious accidents such as water leakage, electric shock, or
fi re.

Tool name Contents of change

Pressure is huge and cannot be measured with a
conventional (R22) gauge. To prevent erroneous mixing

Gauge manifold

Charging hose

Vacuum pump

Gas leakage detector Special gas leakage detector for HFC refrigerant R410A.

of other refrigerants, the diameter of each port has been
changed.
It is recommended to use a gauge manifold with a high
pressure display range –0.1 to 5.3 MPa and a low pressure
display range –0.1 to 3.8 MPa.

To increase pressure resistance, the hose material and base
size were changed.

A conventional (R22) vacuum pump can be used by installing
a vacuum pump adapter.
Be sure that the pump oil does not backflow into the system.
Use one capable for vacuum suction of –100.7 kPa (5 Torr,
–755 mmHg).

En-1

2.3. Accessories

WARNING

For installation purposes, be sure to use the parts supplied by the manufacturer or
other prescribed parts.
The use of non-prescribed parts can cause serious accidents such as the unit to fall,
water leakage, electric shock, or fi re.

The following installation parts are furnished. Use them as required.

Keep the Installation Manual in a safe place and do not discard any other accessories
until the installation work has been completed.

Name and Shape Q’ty Application

Hose band

Drain hose insulation B

For installing drain hose

1

Insulates the drain hose

1

Do not discard any accessories needed for installation until the installation work has
been completed.

Name and Shape Q’ty Application

Operating manual

1

Installation manual

Template (Carton top)

Washer

Coupler heat insulation (Large)

(This book)

1

For ceiling openings cutting Also used as
packing

1

For installing indoor unit

8

For indoor side pipe joint (Large pipe)

1

2.4. Optional parts

Description Model Application

IR receiver unit UTB-*WC For the wireless remote controller.

Remote sensor UTY-XSZX Room temperature sensor

UTY-XWZXZC

UTY-XWZXZB

External connect kit

Auto louver grille UTD-GXT*-W For Auto louver grille

UTY-XWZXZD

UTY-XWZXZ7

UTY-XWZXZE

For output function
(Output terminal / CNB01)

For control input function
(Apply voltage terminal / CNA01)

For control input function
(Dry contact terminal / CNA02)

For forced thermostat off function
(Apply voltage terminal / CNA03)

For forced thermostat off function
(Dry contact terminal / CNA04)

3. INSTALLATION WORK

3.1. Selecting an installation location

Correct initial installation location is important because it is diffi cult to move unit after it is
installed.

WARNING

Select installation locations that can properly support the weight of the indoor. Install
the units securely so that they do not topple or fall.

Coupler heat insulation (Small)

Cable tie (Medium)

Cable tie (Large)

Filter (Small)

Filter (Big)

Drain hose

1

2

4

2

(AR07/09/

12/14/24)

2 (AR18)

1 (AR24)

1

For indoor side pipe joint (Small pipe)

For transmission and remote controller
cable binding

For fixing the coupler heat insulation.

For installing drain pipe VP25
(O.D.32, I.D.25)

CAUTION

Do not install the unit in the following areas:

• Area with high salt content, such as at the seaside.
It will deteriorate metal parts, causing the parts to fail or the unit to leak water.

• Area fi lled with mineral oil or containing a large amount of splashed oil or steam,
such as a kitchen.

It will deteriorate plastic parts, causing the parts to fail or the unit to leak water.

• Area that generates substances that adversely affect the equipment, such as sulfuric
gas, chlorine gas, acid, or alkali.

It will cause the copper pipes and brazed joints to corrode, which can cause

refrigerant leakage.

• Area that can cause combustible gas to leak, contains suspended carbon fi bers or
fl ammable dust, or volatile infl ammables such as paint thinner or gasoline.

If gas leaks and settles around the unit, it can cause a fi re.

• Area where animals may urinate on the unit or ammonia may be generated.

Do not use the unit for special purposes, such as storing food, raising animals, growing
plants, or preserving precision devices or art objects.
It can degrade the quality of the preserved or stored objects.

Do not install where there is the danger of combustible gas leakage.
Do not install the unit near a source of heat, steam, or fl ammable gas.
Install the unit where drainage does not cause any trouble.
Install the indoor unit, power supply cable, transmission cable, and remote controller

cable at least 1 m away from a television or radio receivers. The purpose of this is to
prevent TV reception interference or radio noise.
(Even if they are installed more than 1 m apart, you could still receive noise under
some signal conditions.)

If children under 10 years old may approach the unit, take preventive measures so that
they cannot reach the unit.

En-2

• Decide the mounting position with the customer as follows:

(1) Install the indoor unit on a place having a suffi cient strength so that it withstands

against the weight of the indoor unit.

(2) The inlet and outlet ports should not be obstructed; the air should be able to blow all

over the room.

(3) Leave the space required to service the air conditioner.

(4) A place from where the air can be distributed evenly throughout the room by the unit.

(5) Install the unit where connection to the outdoor unit is easy.

(6) Install the unit where the connection pipe can be easily installed.

(7) Install the unit where the drain pipe can be easily installed.

(8) Install the unit where noise and vibrations are not amplifi ed.

(9) Take servicing, etc., into consideration and leave the spaces. Also install the unit

where the fi lter can be removed.

3.2. Installation dimensions

Provide a service access for inspection purposes.
Do not place any wiring or illumination in the service space, as they will impede service.

Installation Dimensions

Strong and durable ceiling

Left
side

150 mm or
more 1



1 400mm or more when drain from drain pipe

• When intaking air from back

5 mm or more

20 mm or more

225 mm or more

Service access Ceiling

Indoor unit

400 mm
or more

300 mm or more

Air

2500 mm or more

Floor

Right
side

(When no ceiling)

3.3. Installation the unit

WARNING

Install the air conditioner in a location which can withstand a load of at least 5 times the
weight of the main unit and which will not amplify sound or vibration. If the installation
location is not strong enough, the indoor unit may fall and cause injuries.

If the job is done with the panel frame only, there is a risk that the unit will come loose.
Please take care.

3.3.1. Unit installation example

Connect the locally purchased duct.

(1) Inlet side

• Connect the duct to the locally purchased inlet fl ange.

• Connect the fl ange to the body with the locally purchased tapping screws.

• Wind the inlet fl ange connecting to the duct with the aluminum tape etc. to avoid the
air leakage.

CAUTION

When the duct is connected to inlet side, remove contained fi lter and surely attach
locally purchased fi lter at inlet opening.

(2) Outlet side

• Connect the duct with adjusting inside of outlet fl ange.

• Wind the outlet fl ange connecting to the duct with the aluminum tape etc. to avoid the
air leakage.

• Insulate the duct to avoid the dew condensation.

CAUTION

To prevent people from touching the parts inside the unit, be sure to install grilles on
the inlet and outlet ports. The grilles must be designed in such a way that cannot be
removed without tools.

Check that duct work does not exceed the range of external static pressure of
equipment.

Make sure to insulate ducts to avoid the dew condensation.

Make sure to insulate between ducts and walls if metal ducts are used.

Please explain handling and washing methods of locally purchased materials to the
customer.

To prevent people from touching the parts inside the unit, be sure to install grilles on
the inlet and outlet ports. The grilles must be designed in such a way that cannot be
removed without tools.

When connecting the duct to the outlet port of the indoor unit, be sure to insulate the
outlet port and the installation screws to prevent water from leaking around the port.

Set the static pressure of AR07/09/12 model to 0 to 30 Pa.
Set the static pressure of AR14/18/24 model to 0 to 50 Pa.

Replace the cover as follows.

• Remove the screws, and then remove cover.

• Install the cover with the screws as shown in the illustration below.

Model Screw

AR07/09/12/14 6
AR18 7
AR24 8

• When intaking air from bottom

5 mm or more

20 mm or more

225 mm or more

Service access

Adjust the wind direction in the room depending on the shape of blow out opening.

[ Top view ]

300 mm

or more*

Service space

Air

100 mm

Air

*: Above 100mm When intaking air from bottom

100 mm or more

Air

Ceiling

400 mm or more

or more

Service access

En-3

Control
box

screw

Cover

Side Inlet - Side Outlet

Insulation material (Locally purchased)

Aluminum tape

Flange (Locally purchased)

3.3.2. Install the fi lters

• Install the fi lters to the unit.

Air

Duct (Locally
purchased)

Side Inlet - Side Outlet (Duct)

Insulation material (Locally purchased)

Bottom Inlet - Side Outlet

Outlet side

Aluminum tape

Flange (Locally purchased)

Air

Duct (Locally
purchased)

Duct (Locally purchased)

Air

Intake grille
(Locally pur­chased)

Intake grille
(Locally
purchased)

Intake grille
(Locally
purchased)

Air

Filter (Locally purchased)

Air

Flange (Locally purchased)

Aluminum tape

Tapping screw for fl ange
connection (M4 x 10mm/
Locally purchased)

Filter
(Locally purchased)

Air

Filter

A

25 mm

19 mm

AR07/09/12/14/18: 2 fi lters
AR24: 3 fi lters

Unit

3.3.3.

Drilling holes for bolts and installing the bolts

• Using the installation template, drill holes for bolts (4 holes).

Installation template

Filter

Filter (Accessories)

Drilling position
for bolts

Inlet side

109 mm

B

70 mm

AR07/09/12/14 AR18 AR24

A 650 mm 850 mm 1050 mm
B P200×2=400 mm P200×3=600 mm P200×4=800 mm

P200

130 mm

15 mm

38 mm

198 mm

25 mm

11 mm

11 mm

Air

295 mm

A

AR07/09/12/14 AR18 AR24

A 752 mm 952 mm 1152 mm

En-4

3.3.4. Fix the unit

(1) Hang the unit

Hanger

Hanger bolt

Nut A
(Locally purchased)

Washer
(Accessories)

Nut B
(Locally
purchased)

Hanger bolt

Nut A
(Locally purchased)

Washer
(Accessories)

Nut B
(Locally purchased)

20 mm
or less

If the length of hanger bolt is over 20 mm, it will be not convenient for following works:

• The opening and closing of control box cover

• Replacement of drain pump
(2) Leveling

Base horizontal direction leveling on top of the unit.

Ceiling

Level

Hanger

Unit

20 mm
or less

4. PIPE INSTALLATION

CAUTION

Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with
refrigerant R410A models. Also, when storing the piping, securely seal the openings by
pinching, taping, etc.

While welding the pipes, be sure to blow dry nitrogen gas through them.

4.1. Selecting the pipe material

CAUTION

Do not use existing pipes from another refrigeration system or refrigerant.

Use pipes that have clean external and internal sides without any contamination which
may cause trouble during use, such as sulfur, oxide, dust, cutting waste, oil, or water.

It is necessary to use seamless copper pipes.
Material : Phosphor deoxidized seamless copper pipes
It is desirable that the amount of residual oil is less than 40 mg/10 m.

Do not use copper pipes that have a collapsed, deformed, or discolored portion
(especially on the interior surface). Otherwise, the expansion valve or capillary tube
may become blocked with contaminants.

Improper pipe selection will degrade performance. As an air conditioner using R410A
incurs pressure higher than when using conventional (R22) refrigerant, it is necessary
to choose adequate materials.

Thicknesses of copper pipes used with R410A are as shown in the table.

•

Never use copper pipes thinner than those indicated in the table even if they are

•

available on the market.

Thicknesses of Annealed Copper Pipes (R410A)

Pipe outside diameter [mm (in)] Thickness [mm]

6.35 (1/4) 0.80

9.52 (3/8) 0.80

12.70 (1/2) 0.80

15.88 (5/8) 1.00

19.05 (3/4) 1.20

GOOD PROHIBITED

Drain hose

Give a slight tilt to the side to which the drain hose is connected. The tilt should be in the
range of 0 mm to 10 mm.

Air

GOOD PROHIBITED

5 mm or less

10 mm or less

Level

CAUTION

Leave a space of 100 mm or more between the inlet port and the ceiling.

Fasten the unit securely with nuts A and B.

4.2. Pipe requirement

CAUTION

Refer to the Installation Manual of the outdoor unit for description of the length of
connecting pipe or for difference of its elevation.

• Use pipe with water-resistant heat insulation.

CAUTION

Install heat insulation around both the gas and liquid pipes. Failure to do so may cause
water leaks.
Use heat insulation with heat resistance above 120 °C. (Reverse cycle model only)
In addition, if the humidity level at the installation location of the refrigerant piping is
expected to exceed 70 %, install heat insulation around the refrigerant piping. If the
expected humidity level is 70 to 80 %, use heat insulation that is 15 mm or thicker and
if the expected humidity exceeds 80 %, use heat insulation that is 20 mm or thicker.
If heat insulation is used that is not as thick as specifi ed, condensation may form on
the surface of the insulation. In addition, use heat insulation with heat conductivity of

0.045 W/(m·K) or less (at 20 °C).

En-5

4.3. Flare connection (Pipe connection)

WARNING

Tighten the flare nuts with a torque wrench using the specified tightening method.
Otherwise, the fl are nuts could break after a prolonged period, causing refrigerant to
leak and generate hazardous gas if the refrigerant comes into contact with a fl ame.

4.3.1. Flaring

Use special fl are tool exclusive for R410A.

Cut the connection pipe to the necessary length with a pipe cutter.

(1)

Hold the pipe downward so that cuttings will not enter the pipe and remove any

(2)

burrs.

Insert the fl are nut (always use the fl are nut attached to the indoor and outdoor units

(3)

respectively) onto the pipe and perform the fl are processing with a fl are tool. Use
the special R410A fl are tool, Leakage of refrigerant may result if other fl are nuts are
used.
Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from

(4)

entering the pipes.

Check if [L] is fl ared uniformly

B

and is not cracked or scratched.

When the fl are nut is tightened properly by your hand, hold the body side coupling with
a separate spanner, then tighten with a torque wrench. (See the table below for the fl are
nut tightening torques.)

Tighten with 2 wrenches.

Holding wrench

Torque wrench

Indoor unit pipe
(Body side)

Flare nut [mm (in)] Tightening torque [N·m (kgf·cm)]

6.35 (1/4) dia. 16 to 18 (160 to 180)

9.52 (3/8) dia. 32 to 42 (320 to 420)

12.70 (1/2) dia. 49 to 61 (490 to 610)

15.88 (5/8) dia. 63 to 75 (630 to 750)

19.05 (3/4) dia. 90 to 110 (900 to 1,100)

Flare nut

Connection pipe

Die

A
Pipe

Pipe outside diameter

[mm (in)]

6.35 (1/4)

9.52 (3/8) 13.2

12.70 (1/2) 16.6

15.88 (5/8) 19.7

19.05 (3/4) 24.0

When using conventional (R22) fl are tools to fl are R410A pipes, the dimension A should
be approximately 0.5 mm more than indicated in the table (for fl aring with R410A fl are
tools) to achieve the specifi ed fl aring. Use a thickness gauge to measure the dimension A.
It is recommended that a R410A fl aring tool is used.

Width across

fl ats

L

Dimension A [mm]

Flare tool for R410A,

clutch type

0 to 0.5

Pipe outside diameter

[mm (in)]

6.35 (1/4) 17

9.52 (3/8) 22

12.70 (1/2) 26

15.88 (5/8) 29

19.05 (3/4) 36

Dimension B

Width across flats of

Flare nut [mm]

9.1

-00.4

[mm]

4.3.2. Bending pipes

If pipes are shaped by hand, be careful not to collapse them.

•

Do not bend the pipes in an angle more than 90°.

•

When pipes are repeatedly bend or stretched, the material will harden, making it

•

diffi cult to bend or stretch them any more.
Do not bend or stretch the pipes more than 3 times.

•

4.4. Installing heat insulation

Install the heat insulation material after performing a refrigerant leak check (see the In­stallation Manual for the outdoor unit for details).

4.4.1. Coupler heat insulation

• Insulate by the coupler heat insulation (Accessories) around the gas pipe and liquid
pipe of indoor side.

• After installing the coupler heat insulation, wrap both end with vinyl tape so that there
is no gap.

• After affi xing the coupler heat insulation, secure it with 2 cable ties (large), one on
each end of the insulation.

• Make sure that the cable ties overlap the heat insulation pipe.

Coupler heat
insulation
(Accessories)

Cable tie (Large)
(Accessories)

After checking for gas leaks (refer to the Installation Manual of the outdoor unit),
perform this section.

Install heat insulation around both the large (gas) and small (liquid) pipes. Failure to do
so may cause water leaks.

Cover this portion with
heat insulation.

Heat insulation

CAUTION

CAUTION

To prevent breaking of the pipe, avoid sharp bends.

If the pipe is bent repeatedly at the same place, it will break.

4.3.3. Pipe connection

CAUTION

Be sure to install the pipe against the port on the indoor unit correctly. If the centering
is improper, the fl are nut cannot tighten smoothly. If the fl are nut is forced to turn, the
threads will be damaged.

Do not remove the flare nut from the indoor unit pipe until immediately before
connecting the connection pipe.

Hold the torque wrench at its grip, keeping it at a right angle with the pipe, in order to
tighten the fl are nut correctly.

Connect the piping so that the control box cover can easily be removed for servicing
when necessary.

In order to prevent water from leaking into the control box, make sure that the piping is
well insulated.

En-6

5. INSTALLING DRAIN PIPES

WARNING

Do not insert the drain piping into the sewer where sulfurous gas occurs. (Heat
exchange erosion may occur)

Insulate the parts properly so that water will not drip from the connection parts.

Check for proper drainage after the construction by using the visible portion of
transparent drain port and the drain piping fi nal outlet on the body.

CAUTION

Do not apply adhesive agent on the drain port of the body.
(Use the attached drain hose and connect the drain piping)

5.1A. ARXK**GCLH model

• Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32 mm].

• Do not perform a rise, trap and air bleeding.

• Provide a downward gradient (1/100 or more).

• Provide supporters when long pipes are installed.

• Use an insulation material as needed, to prevent the pipes from freezing.

• Install the pipes in a way that allows for the removal of the control box.

GOOD

Locally arranged pipe

Gap of 1.5 to 2 m

Supporter

5.1B. ARXK**GALH model

•

When using the drain port on the left side of the unit, remove the drain cap and install it to
the right side drain port.

Drain cap

Unit

• Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32 mm].

• Do not perform a rise, trap and air bleeding.

• Provide a downward gradient (1/100 or more).

• Provide supporters when long pipes are installed.

• Use an insulation material as needed, to prevent the pipes from freezing.

• Install the pipes in a way that allows for the removal of the control box.

GOOD

100 mm or more

ownward gradient

D

2.5 to 5.0 mm

Gap of 1.5 to 2 m

Supporter

Max. 300 mm

Horizontal or
upward gradient

VP25 [O.D
32 mm or more]

700 mm or less

PROHIBITED

Air bleeding

Observe the following procedures to construct centralized drain pipe fi ttings.

VP30 or more [O.D 38 mm or more]

Downward gradient 1/100 or more

700 mm or less

Rise

Trap

Locally arranged pipe

VP25 [O.D 32 mm
or more]

PROHIBITED

Trap

Rise

Air bleeding

Observe the following procedures to construct centralized drain pipe fi ttings.

VP30 or more
[O.D 38 mm or more]

Downward gradient
1/100 or more

5.2. Install the drain pipe

(1) Be sure to use supplied Drain hose 1 and Hose band 2

Drain
hole

Hose band (Accessories)

2

Drain hose (Accessories)

1

Hard PVC side

En-7

Hose band

4 mm or less

20 mm

1

Drain hose

Fasten the Hose band 2 at the position where
horizontal against earth (ground).
The Hose band 2 must be positioned at the right
side of the Drain hose 1 as in the fi gure.

2

Hose band

Press fi rmly

Roll the in­sulation over
the joint.

Slit

Press fi rmly

STEP 3

(2) Be sure to connect Drain pipe with adhesive (polyvinyl chloride) so that there is no

leakage.

Applying
area of
adhesive

4 mm or less

Joint pipe (Lo­cally purchased)

Drain pipe (VP25)
(Locally purchased)

CAUTION

Do not connect to the Drain hole with adhesive. Using adhesive may cause damage
and water leaks.

(3) After installing the Drain hose 1, check if the drainage is smooth.

CAUTION

To prevent excessive force on Drain hose 1, avoid bends or twists. (To bend or twist
may cause water leaks.)

(4) After checking for drainage, attach the Drain hose insulation B 3 to insulate, following

the instructions as in the fi gures.
To avoid space with Drain hose 1 and Hose band 2, press fi rmly the Drain hose
insulation B 3.

• FINISH

Check that there is no gap between the unit and the drain hose insulation.

• When drain pump is used.

Do not cover the
panel window.

• When drain pump is not used. (Natural drainage)

Do not cover the
control box cover.

Check for drainage (When drain pump is used)

Note:

Pour about 1 liter of water from the position shown in the diagram or from
the airfl ow outlet to the dew tray. Check for any abnormalities such as
strange noises and whether the drain pump functions normally.

Ensure there is
no space.

• STEP1 - STEP3
Butt the insulation

against the unit.

Press fi rmly

STEP 1

STEP 2

3

Drain hose insulation B

(Accessories)

Press fi rmly

Slit

Press fi rmly

Unit

Slit

Check for drainage (When drain pump is not used)

Note:

Pour about 1 liter of water from the airfl ow outlet to the dew tray. Check for
any abnormalities such as strange noises.

CAUTION

Make sure the drain water is properly drained.

En-8

6. ELECTRICAL WIRING

WARNING

Electrical work must be performed in accordance with this Manual by a person certifi ed
under the national or regional regulations. Be sure to use a dedicated circuit for the
unit.
An insuffi cient power supply circuit or improperly performed electrical work can cause
serious accidents such as electric shock or fi re.

Before starting work, check that power is not being supplied to the all units.

For wiring, use the prescribed type of cables, connect them securely, making sure that
there are no external forces of the cables applied to the terminal connections.
Improperly connected or secured cables can cause serious accidents such as
overheating the terminals, electric shock, or fi re.

Securely install the electrical box cover on the unit.
An improperly installed electrical box cover can cause serious accidents such as
electric shock or fi re through exposure to dust or water.

Install sleeves into any holes made in the walls for wiring. Otherwise, a short circuit
could result.

Use the included connection cables and power cables or ones specified by the
manufacturer. Improper connections, insuffi cient insulation, or exceeding the allowable
current can cause electric shock or fi re.

Do not modify the power cables, use extension cables, or use any branches in the
wiring. Improper connections, insuffi cient insulation, or exceeding the allowable current
can cause electric shock or fi re.

Match the terminal block numbers and connection cable colors with those of the
outdoor unit . Erroneous wiring may cause burning of the electric parts.

Securely connect the connection cables to the terminal board. In addition, secure the
cables with wiring holders. Improper connections, either in the wiring or at the ends of
the wiring, can cause a malfunction, electric shock, or fi re.

Always fasten the outside covering of the connection cable with the cable clamp. (If the
insulator is chafed, electric discharge may occur.)

Install an earth leakage breaker. In addition, install the earth leakage breaker so that
the entire AC main power supply is cut off at the same time. Otherwise, electric shock
or fi re could result.

Always connect the earth (ground) cable.
Improper earthing (grounding) work can cause electric shocks.

Install the remote controller cables so as not to be direct touched with your hand.

Perform wiring work in accordance with standards so that the air conditioner can be
operated safely and positively.

Connect the connection cable fi rmly to the terminal board. Imperfect installation may
cause a fi re.

If the supply cable is damaged, it must be replaced by the manufacturer, its service
agent or similarly qualifi ed persons in order to avoid a hazard.

CAUTION

Earth (Ground) the unit.
Do not connect the earth (ground) cable to a gas pipe, water pipe, lightning rod, or a
telephone earth (ground) cable.
Improper earthing (grounding) may cause electric shock.

Do not connect power supply cables to the transmission or remote controller terminals,
as this will damage the product.

Never bundle the power supply cable and transmission cable, remote controller cable
together.
Separate these cable by 50 mm or more.
Bundling these cables together will cause miss operation or breakdown.

When handling PCB, static electricity charged in the body may cause malfunction of
the PCB. Follow the cautions below:

• Establish an earth (ground) for the indoor and outdoor units and peripheral devices.

• Cut power (breaker) off.

• Touch metal part of the indoor unit for more than 10 seconds to discharge static
electricity charged in the body.

• Do not touch terminals of parts and patterns implemented on PCB.

6.1. Electrical requirement

Voltage rating 230 V

Operating range 198 to 264 V (50 Hz)

• Select the power cable type and size in accordance with relevant local and national
regulations.

• Specifi cations for local wiring power cord and branch wiring are in compliance with local
code.

• Max. wire length: Set a length so that the voltage drop is less than 2%. Increase the
wire diameter when the wire length is long.

Breaker should be installed at every refrigerant system. Do not use a breaker in a different
refrigerant system.

Refer to the table for the breaker specifi cations of each installation condition. Perform
the power crossover wiring within the range of the same refrigerant system. When the
crossover wiring is done, make a connection for indoor units to satisfy conditions A and B
below.

A. Current breaker requirements

ARXK07GALH 0.33 A

ARXK09GALH 0.33 A
ARXK12GALH 0.43 A
ARXK14GALH 0.80 A
ARXK18GALH 0.93 A

ARXK24GALH 1.03 A
ARXK07GCLH 0.34 A
ARXK09GCLH 0.34 A
ARXK12GCLH 0.44 A
ARXK14GCLH 0.81 A
ARXK18GCLH 0.94 A
ARXK24GCLH 1.04 A

MCA: Minimum Circuit Ampacity
MFA: Main Fuse Ampacity

When the power crossover wiring is done, make it so that the total of the MCA of the
connected RB units and indoor units does not exceed the 15 A. For RB unit MCA, refer to
the RB unit installation manual.
If the capacity of connected RB units and indoor units exceeds the upper limit, either add
breakers or use a breaker with a greater capacity.

B. Earth leakage breaker requirements

Breaker capacity

30 mA, 0.1 sec or less 44 or less **

100 mA, 0.1 sec or less 45 to 148

Heat pump type: indoor units, Heat recovery type: indoor units and RB units.

*
** If the total number of units connected to the breaker exceeds 44, either add a 30mA

breaker, or use breakers with a greater capacity.

6.1.1. Cable specifi cations

Follow the specifi cations below for the power supply, transmission and remote controller
cable.

Power supply
cable

Transmission
cable

Remote
controller cable
(2-wire type)

Remote
controller cable
(3-wire type)

*: Use shielded cable in accordance with local rules for remote controller cable.

198 to 253 V (60 Hz)

Model MCA MFA

20 A

* Maximum connectable “indoor units” or

“indoor units + RB units”

Recommended

cable size (mm2)

2.5

0.33

0.33 to 1.25

0.33

Cable type Remark

Type60245 IEC57
or equivalent

LONWORKS
compatible cable

Sheathed PVC
cable*

Sheathed PVC
cable*

2 Cable + earth (ground)

22 AWG LEVEL 4 (NEMA)
non-polar 2 core, twisted pair
solid core diameter 0.65 mm

Non-polar 2 core, twisted pair

Polar 3 core

En-9

6.2. Wiring method

Example

Outdoor unit or RB unit *1

Transmission

Indoor unit

Transmission
Power supply

Breaker

Power supply Remote controller

*1: When connecting to the Heat Recovery System, refer to the installation manual of the

RB unit.
*2: Earth (Ground) the remote controller if it has a earth (ground) cable.
*3: When connecting the 2-wire type remote controller, Y3 is not used.

* Earth (Ground) the remote controller if it has an earth (ground) wire.
Connect the earth (ground) wire of the remote controller to the earth (ground) terminal of
transmission.

*2

(Crossover wiring of power supply)

Power supply

Pull box

Breaker

Remote
control

(Master)

Indoor unit

Power supply

*3

Breaker Breaker

Power supply Power supply

Pull box

Indoor unit Indoor unit

*2

Indoor unit Indoor unit

*3

Remote controller

(Slave)

*2

Remote controller

*3

6.3. Unit wiring

Before attaching the cable to terminal block.

6.3.1 Power supply cable

Adjust the length of power supply cable to avoid excessive tension with referring fi gure
below.

Earth (Ground)
cable

20 mm

30 mm

WARNING

When using solid core cables, do not use the ring terminal. If you use the solid core
cables with the ring terminal, the ring terminal's pressure bonding may malfunction and
cause the cables to abnormally heat up.

B. For strand wiring

(1) Use ring terminals with insulating sleeves as shown in the fi gure below to connect to

the terminal block.

(2) Securely clamp the ring terminals to the cables using an appropriate tool so that the

cables do not come loose.

(3) Use the specifi ed cables, connect them securely, and fasten them so that there is no

stress placed on the terminals.

(4) Use an appropriate screwdriver to tighten the terminal screws.

Do not use a screwdriver that is too small, otherwise, the screw heads may be

damaged and prevent the screws from being properly tightened.

(5) Do not tighten the terminal screws too much, otherwise, the screws may break.

(6) See the table for the terminal screw tightening torques.

(7) Please do not fi x 2 power supply cables with 1 screw.

Strip 10 mm

Screw with spe-

Cable

Use ring terminals and tighten the terminal screws to the specifi ed torques, otherwise,
abnormal overheating may be produced and possibly cause heavy damage inside the
unit.

M4 screw (Power supply/L, N, GND) 1.2 to 1.8 N·m (12 to 18 kgf·cm)

cial washer

Ring terminal

Terminal block

Tightening torque

WARNING

Ring terminal

Sleeve

Screw with
special washer

Ring
terminal

Cable

6.3.2 Transmission and Remote controller cable

Transmission cable

25 mm

A. For solid core wiring

(1) To connect the electrical terminal, follow the below diagram and connect after looping

it around the end of the cable.

(2) Use the specifi ed cables, connect them securely, and fasten them so that there is no

stress placed on the terminals.

(3) Use an appropriate screwdriver to tighten the terminal screws.

Do not use a screwdriver that is too small, otherwise, the screw heads may be

damaged and prevent the screws from being properly tightened.

(4) Do not tighten the terminal screws too much, otherwise, the screws may break.

(5) See the table for the terminal screw tightening torques.

(6) Please do not fi x 2 power supply cables with 1 screw.

Strip 25 mm

Loop

Cable

Screw with
special washer

Cable end (Loop)

Terminal block

Screw with
special washer

Cable end
(Loop)

Cable

Shielded cable (no fi lm)

40 mm

Remote controller cable

For 3-wire type

20 mm

• Connect remote controller and transmission cables as shown in Fig. A.

Fig. A

For 2-wire type

20 mm

GOOD PROHIBITED

Different diameter

Connect to 1 side

WARNING

Tighten the terminal screws to the specifi ed torques, otherwise, abnormal overheating
may be produced and possibly cause heavy damage inside the unit.

M3 screw (Transmission/X1, X2)
(Remote controller/ Y1, Y2)

Terminal number Tightening torque

0.5 to 0.6 N·m
(5 to 6 kgf·cm)

En-10

CAUTION

To peel the fi lm from the lead cable, use a dedicated tool that will not damage the
conductor cable.

When installing a screw on the terminal block, do not cut the cable by overtightening
the screw. On the other hand, an undertightened screw can cause faulty contact, which
will lead to a communication failure.

6.4. Connection of wiring

(1) Remove the cover.
(2) Connect the connection cable.

Cover

6.5. External input and external output (Optional
parts)

Controller PCB

OFF ON

SW1

SW2

SW3

SW4

DIP switch
(SET 2)

Screw

CAUTION

When switching the DIP switch (SW1), be sure to turn off the power supply to the
indoor unit. Otherwise, the PC board of the indoor unit may be damaged.

Y1,Y2,Y3: Remote
controller cable

X1, X2: Transmission cable

GND

L, N: Power supply cable

Cable clamp

For 2-wire type For 3-wire type

Y1:Red
Y2:White
Y3:Black

3WIRE

Cable tie (Medium)
(Accessories)

DIP switch

(SW1)

Connect the remote
controller cable

Set the DIP switch
(SW1)

*1: If you connect the remote controller cable to the terminal

Y3, 2-wire type remote controller does not work.

Y1:Non-polar
Y2:Non-polar
Y3:Do not connect *1

2WIRE
(Factory setting)

Dry contact terminal

(CNA04)

(CNA02)

Output terminal
(CNB01)

(CNA03)

(1) External input

• Indoor unit can be Operation/Stop, Emergency stop or Forced stop by using indoor unit
PCB CNA01 or CNA02.

• “Operation/Stop” mode, “Emergency stop” mode or “Forced stop” mode can be selected
with function setting of indoor unit.

• Indoor unit can be Forced thermostat off by using indoor unit PCB CNA03 or CNA04.

• A twisted pair cable (22 AWG) should be used. Maximum length of cable is 150 m.

• Use an external input and output cable with appropriate external dimension, depending
on the number of cables to be installed.

• The wire connection should be separate from the power cable line.

Input select

Use either one of these types of terminal according to the application. (Both types of
terminals cannot be used simultaneously.)

● Apply voltage terminal ([CNA01], [CNA03])

When a power supply must be provided at the input device you want to connect, use the
Apply voltage terminal ([CNA01], [CNA03]).

Load

Input

resistance

*a

device 1

(CNA01)

Apply voltage terminal

DC power supply
12 to 24V

*1

P.C . B

CNA01

*b

Load

Input

Input

*1

Make the power supply DC12 to 24V. Select a power supply capacity with an ample

surplus for the connected load.
Do not impress a voltage exceeding 24V across pins 1-2, and 1-3.
*a The allowable current is DC 5mA to 10mA. (Recommended: DC5mA)
Provide a load resistance such that the current becomes DC10mA or less.
Select very low current use contacts (usable at DC12V, DC1mA or less).
*b The polarity is [+] for pin 1 and [-] for pin 2 and 3. Connect correctly.

resistance

*a

device 2

Load
resistance

*a

device 3

connected unit

CNA03

Power supply
cable

Avoid touching the ceiling with the wiring

Ceiling

Do not bind the power supply cable and other cables together.

En-11

Avoid covering the air
inlet with the wiring.

When connected to Apply voltage terminals of multiple indoor units with a connected unit,
be sure to make a branch outside the indoor unit using a pull box, etc. as shown on below
example.

DC power supply

Load

Input

Input

● Dry contact terminal ([CNA02], [CNA04])

When a power supply is unnecessary at the input device you want to connect, use the Dry
contact terminal ([CNA02], [CNA04]).

resistance

device 1

Load
resistance

device 2

connected unit

12 to 24V

P.C . B

CNA01

Indoor unit

P.C . B

CNA01

Indoor unit

P.C . B

CNA01

Indoor unit

P.C . B

● When function setting is “Operation/Stop” mode.

[In the case of “Edge” input]

Connector Input signal Command

Ch1 of CNA01 or CNA02

[In the case of “Pulse” input]

Connector Input signal Command

CNA01 or CNA02

* The last command has priority.
* The indoor units within the same remote controller group operates in the same mode.

● When function setting is “Emergency stop” mode.

[In the case of “Edge” input]

Connector Input signal Command

Ch1 of CNA01 or CNA02

OFF → ON Operation

ON → OFF Stop

Ch1 OFF → ON Operation

Ch2 OFF → ON Stop

OFF → ON Emergency stop

ON → OFF Normal

*c

*c

Ch 1

Ch 2

*c
Ch 3

connected unit

*c Select very low current use contacts (usable at DC12V, DC1mA or less).
*d The wiring is different from Apply voltage terminals. Be suffi ciently careful when wiring.

When connected to Dry contact terminals of multiple indoor units with a connected unit,
insulate each indoor unit with relay, etc. as shown on below example.

K1

K2

Power supply for relay

Input device 1

Input device 2

K3

GND

K4

K5

K6

K1 - K6: Relay

(Device for DC Current)

CNA02

*d

CNA04

P.C . B

CNA02

Indoor unit

P.C . B

CNA02

Indoor unit

P.C . B

CNA02

Indoor unit

NOTE :

When connected to multiple indoor units directly, it will cause breakdown.

[In the case of “Pulse” input]

Connector Input signal Command

CNA01 or CNA02

* All indoor units of same refrigerant system stops when Emergency stop operates.

Ch1 OFF → ON Emergency stop

Ch2 OFF → ON Normal

● When function setting is “Forced stop” mode.

[In the case of “Edge” input]

Connector Input signal Command

Ch1 of CNA01 or CNA02

[In the case of “Pulse” input]

Connector Input signal Command

CNA01 or CNA02

* When the forced stop is triggered, indoor unit stops and Operation/Stop operation by a

remote controller is restricted.

* When forced stop function is used with forming a remote controller group, connect the

same equipment to each indoor unit within the group.

• Selection method of functions

“Operation/Stop” mode or “Emergency stop” mode, “Forced stop” mode can be selected
with function setting of indoor unit.

OFF → ON Forced stop

ON → OFF Normal

Ch1 OFF → ON Forced stop

Ch2 OFF → ON Normal

● Forced thermostat off function

[“Edge” input only]

Connector Input signal Command

Ch3 of CNA03 or CNA04

OFF → ON Thermostat off

ON → OFF Normal

Operation behavior

● Input signal type

The input signal type can be selected.
It is switched by DIP switch on the indoor unit PCB.

DIP switch [Set 2 SW2] Input signal type

OFF (Factor y setting) Edge

ON Pulse

Edge

Pulse

The width of pulse
must be longer than
200msec.

En-12

(2) External output

• A twisted pair cable (22AWG) should be used. Maximum length of cable is 25m.

• Use an external input and output cable with appropriate external dimension, depending
on the number of cables to be installed.

• Output voltage: Hi DC12V±2V, Lo 0V.

• Permissible current: 50mA

CAUTION



To protect the cable insulation after opening a knockout hole, remove any burrs from
the edge of the hole.

Output select

● When indicator etc. are connected directly

Operation

indicator

Error

indicator

Indoor unit Fan
status indicator

connected unit

● When connecting with unit equipped with a power supply

Connected

device 1

Connected

device 2

Connected

device 3

connected unit Relay (Locally purchased)

Operation behavior

Connector Output voltage Status

0V Stop

DC 12 V Operation

0V Normal

DC 12 V Error

0V Indoor unit fan stop

DC 12 V Indoor unit fan operation

CNB01

External output1

Pins 1-2

External output2

Pins 1-3

External output3

Pins 1-4

P.C . B

P.C . B

CNB

CNB

01

6.6. Remote sensor (Optional parts)

Connection method

• Connection terminals

Controller PCB

01

Remote sensor
terminal (CN8)

• Wiring arrangement

Controller PCB

(3) Connection methods

• Wire modifi cation

Remove insulation from wire attached to wire kit connector.
Remove insulation from fi eld supplied cable. Use crimp type insulated butt connector to
join fi eld cable and wire kit wire.
Connect the wire with connecting wire with solder.

IMPORTANT:

• Connection terminals and wiring arrangement

In following fi gure, all the possible connectors are connected for description.
In actual installation, you cannot connect all the connectors at once.

Be sure to insulate the connection between the wires.

Locally purchased

Solder and insulate the connected parts.

Controller PCB

Option parts
External input/output wire

• Remove the existing connector and replace it with the remote sensor connector (ensure
that the correct connector is used).

• The original connector should be insulated to ensure that it does not come into contact
with other electrical circuitry.

• Use conduit hole when external output cable is used.

CAUTION



To protect the cable insulation after opening a knockout hole, remove any burrs from
the edge of the hole.

Setting for room temperature correction

When a remote sensor is connected, set the function setting of indoor unit as indicated
below.

• Function Number “30”:

Set the Setting Number to “00”. (Default)

• Function Number “31”:

Set the Setting Number to “02”.

* Refer to “7.5. Function setting” for details about Function Number and Setting Number

En-13

6.7. IR receiver unit (Optional parts)

• For the installation method, please refer to the INSTALLATION MANUAL of IR receiver
unit.

Connection method

• Connection terminals

Controller PCB

IR receiver
unit terminal
(CN18)

• Wiring arrangement
Controller PCB

• Wiring arrangement
Controller PCB

• Use 7 pins for receiver unit cable.

At fi rst, connect the receiver unit cable to the controller PCB.

•

•

Attach the core that comes between controller PCB and the clamp.

• Use conduit hole when external output cable is used.

To protect the cable insulation after opening a knockout hole, remove any burrs from
the edge of the hole.





Core

CAUTION

CAUTION



To protect the cable insulation after opening a knockout hole, remove any burrs from
the edge of the hole.

6.9. Optional parts cable binding

Cable tie (Medium/Accessories)
Remote sensor, Receiver unit
and Auto Louver grille

Cable tie (Medium/Accessories)
External input and external
output

Avoid covering the air inlet

Power supply
cable

Avoid touching the ceiling with the wiring

Do not bind the power supply cable and other cables together.

Ceiling

CAUTION

To protect the cable insulation after opening a knockout hole, remove any burrs from
the edge of the hole.

with the wiring.

6.8. Auto louver grille (Optional parts)

Connection method

• Connection terminals

Controller PCB

Auto louver
grille terminal
(CN12)

En-14

7. FIELD SETTING

There are 3 methods for address setting by FIELD SETTING as follows.
Set by either of the methods.
Each setting method is described (1) to (3) below.

(1) IU AD, REF AD SW settings ...... This section (7.1. Setting the address)

(2) Remote controller settings ......... Refer to the wired or wireless remote controller

(3) Automatic address settings ....... Refer to the outdoor unit manual for detailed setting

Be sure to turn OFF the power before performing the fi eld setting.

7.1. Setting the address

Manual address setting method

• If the receiver unit is attached, the indoor unit address and the refrigerant circuit
address can also be set up through the wireless remote controller.

Use an insulated screwdriver to set the DIP switches.

Rotary switch
Example: “0”

manual for detailed setting information. (Set IU AD,
REF AD SW to 0)

information. (Set IU AD, REF AD SW to 0)

CAUTION

CAUTION

Rotary switch
Example: “0”

Table A

Rotary

Address

Refrigerant circuit

000000
101101
202202
303303
404404
505505
606606
707707
808808

909909
10 1 0 10 1 0
11 1 1 11 1 1
12 1 2 12 1 2

.
.
.

99 9 9 63 6 3

Do not set the indoor unit address (IU AD SW) at 64 to 99.
It may result in failure.

switch

setting

REF AD SW

× 10 × 1 × 10 × 1

.
.
.

Address

Indoor unit

.
.
.

.
.
.

Rotary

setting

IU AD SW

.
.
.

switch

(3) Remote controller address

i) 3-wire type

Rotary switch (RC AD SW)...Factory setting “0”
When connecting multiple indoor units to 1 standard wired remote controller, set the

address at RC AD SW in sequence from 0.

Setting Setting range Type of switch

.
.
.

Setting

Indoor unit address 0 to 63

Refrigerant
address

circuit

Setting

range

0 to 99

Setting
example
2

Setting
example
63

Type of switch

IU AD × 10 IU AD × 1

REF AD × 10

REF AD × 1

(1) Indoor unit address

Rotary switch (IU AD × 1)...Factory setting “0”
Rotary switch (IU AD × 10)...Factory setting “0”
When connecting multiple indoor units to 1 refrigerant system, set the address at IU

AD SW as shown in the Table A.

(2) Refrigerant circuit address

Rotary switch (REF AD × 1)...Factory setting “0”
Rotary switch (REF AD × 10)...Factory setting “0”
In the case of multiple refrigerant systems, set REF AD SW as shown in the Table A

for each refrigerant system.

Set to the same refrigerant circuit address as the outdoor unit.

• If working in an environment where the wireless remote controller can be used, the
addresses can also be set using the remote controller.

• If setting the addresses using the wireless remote controller, set the indoor unit
address and refrigerant circuit address to “00”.

(For information on setting using the wireless remote controller.)

Remote controller
address

Example

If 4 indoor units are connected.

Indoor unit

RC AD SW

0 to 15

Indoor unit Indoor unit Indoor unit

RC AD SW1RC AD SW

0

Remote
controller

RC AD SW 01234567

Address 01234567

RC AD SW 89ABCDEF

Address 8 9 10 11 12 13 14 15

ii) 2-wire type

Rotary switch (RC AD SW)...Factory setting “0”
Since the remote controller address settings are automatically confi gured, you do not

need to confi gure them.

If confi guring manually, it is necessary to confi gure both the indoor unit and the remote

controller.

For details, please refer to the remote controller manual.

Setting
example
0

RC AD

RC AD SW

2

3

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7.2. Custom code setting

Selecting the custom code prevents the indoor unit mix-up.
(Up to 4 codes can be set.)
Perform the setting for both the indoor unit and the remote controller.

Code change

A B C D

Indoor
unit

Confusion

7.4. Switching of airfl ow direction louver function

When auto louver grille (Optional parts) is attached, set the airfl ow direction louver func-
tion “Valid”.
The airfl ow direction louver of auto louver grille can be operated by the remote controller
while the airfl ow direction louver function is valid.

• Installation method

Set the DIP switch SET 4 SW2, SW2 referring to the Table D.

Remote
controller

A B C D

Custom code setting for indoor unit

Set the DIP switch SET 3 SW1, SW2 referring to the Table B.

ON

OFF

SW1SW2SW3SW

Table B

A (Factory setting) B C D

DIP switch SET3 SW1 OFF ON OFF ON
DIP switch SET3 SW2 OFF OFF ON ON

Dip switch “SET 3”

4

Custom code

Table D

DIP switch

SET 4 SW2

ON

OFF

SW SW SW SW
1 2 3 4

Airflow direction louver function “Invalid”

OFF

(Factory setting)

ON Airflow direction louver function “Valid”

DIP switch “SET 4”

7.3. Static pressure mode

CAUTION

If the applicable static pressure does not match the static pressure mode, the static
pressure mode may be changed to another mode manually.

Recommended range of external static pressure

AR07/09/12: 0 Pa to 30 Pa
AR14/18/24: 0 Pa to 50 Pa

It is necessary to set up a static pressure mode for each usage of static pressure.
Static pressure can be set at site.
Relation between set values and static pressure are as the following table.

• FUNCTION SETTING can be performed with the wired or wireless remote controller.
(The remote controller is optional equipment)

• Refer to the wired or wireless remote controller manual for detailed setting information.

Function Number Setting Number Setting Static Pressure

26

Setting static pressure becomes “30Pa” if AR07/09/12 is set to “04” through “05”.

00 0 Pa
01 10 Pa
02 20 Pa
03 30 Pa
04 40 Pa
05 50 Pa

31

AR07/09/12 : 10 Pa
AR14/18/24 : 15 Pa

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7.5. Function setting

• FUNCTION SETTING can be performed with the wired or wireless remote controller.
(The remote controller is optional equipment)

• Refer to the wired or wireless remote controller manual for detailed setting information.

• Refer to “7.1. Setting the address” for indoor unit address and refrigerant circuit ad­dress settings.

• Turn the power of the indoor unit ON before starting the setting.

* Turning on the power to the indoor units initializes EEV, so make sure the piping air

tight test and vacuuming have been conducted before turning on the power.

* Also check again to make sure no wiring mistakes were made before turning on the

power.

Function details

Function

Filter indicator
interval

Filter indicator
action

Cool air
temperature
trigger

Heat air
temperature
trigger

Function

number

11

13

30

31

Setting number

00 Standard

01 Longer

02 Shorter

00 Enable

01 Disable

Display
only on

02

central
remote
controller

00 Standard

01 Adjust (1)

02 Adjust (2)

00 Standard

01 Adjust (1)

02 Adjust (2)

03 Adjust (3)

Default

Adjust the fi lter cleaning interval

○

notifi cation. If the notifi cation is too
early, change to setting 01. If the
notifi cation is too late, change to
setting 02.

Details

○

Enable or disable the fi lter indicator.
Setting 02 is for use with a central
remote controller.

○

Adjust the cool air trigger tempera­ture. To lower the trigger tempera­ture, use setting 01. To raise the
trigger temperature, use setting 02.

Adjust the heat air trigger tempera-

○

ture. To lower the trigger temperature
by 6 degrees C, use setting 01. To
lower the trigger temperature by 4
degrees C, use setting 02. To raise
the trigger temperature, use setting

03.

8. TEST RUN

8.1. Test run using Outdoor unit (PCB)

• Refer to the Installation Manual for the outdoor unit if the PCB for the outdoor unit is to
be used for the test run.

8.2. Test run using Remote Controller

• Refer to the Installation Manual for the remote controller to perform the test run using
the wireless remote controller.

• When the air conditioner is being test run, the OPERATION and TIMER indicators
fl ash slowly at the same time.

9. CHECK LIST

Pay special attention to the check items below when installing the indoor unit(s). After
installation is complete, be sure to check the following check items again.

CHECK ITEMS If not performed correctly

Has the indoor unit been installed correctly?

Has there been a check for gas leaks
(refrigerant pipes)?

Has heat insulation work been completed? Water leakage
Does water drain easily from the indoor units? Water leakage
Is the voltage of the power source the same as

that indicated on the label on the indoor unit?
Are the wires and pipes all connected

completely?
Is the indoor unit earthed (grounded)? Short circuit
Is the connection cable the specified

thickness?
Are the inlets and outlets free of any

obstacles?
Does start and stop air conditioner operation

by remote controller or external device?
After installation is completed, has the proper

operation and handling been explained to the
user?

Vibration, noise, indoor unit
may drop

No cooling, No heating

No operation, heat or burn
damage

No operation, heat or burn
damage

No operation, heat or burn
damage

No cooling, No heating

No operation

CHECK

BOX

Auto restart 40

Cool Air
Prevention

External
control

Error report
target

Fan setting
when cooling
thermostat
OFF

(Forbidden) 60 00

(Forbidden) 61 00

(Forbidden) 62 00

43

46

47

49

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00 Enable

01 Disable

00 Super low

Follow the
setting on

01

the remote
controller

00 Start/Stop

Emergency

01

stop

Forced

02

stop

00 All

Display only
on central

01

remote
controller

Follow the
setting on

00

the remote
controller

01 Stop

Enable or disable automatic system
restart after a power outage.
* Auto restart is an emergency func-

tion such as for power failure etc.
Do not start and stop the indoor unit
by this function in normal operation.
Be sure to operate by the control
unit, converter or external input

○

device.

○

Restrain the cold airfl ow with making
the airfl ow lower when starting heat-
ing operation. To correspond to the
ventilation, set to 01.

Allow an external controller to start

○

or stop the system, or to perform an
emergency stop.
* If an emergency stop is performed

from an external controller, all
refrigerant systems will be disabled.

* If forced stop is set, indoor unit

stops by the input to the external
input terminals, and Start/Stop by a
remote controller is restricted.

○

Change the target for reporting
errors. Errors can either be reported
in all locations, or only on the central
remote controller.

When set to 01, the fan stops when
the thermostat is OFF in cooling

○

operation. Connection of the wired
remote controller (2-wire type
or 3-wire type) and switching its
thermistor are necessary.

○
○
○

10. ERROR CODES

If you use a wired type remote controller, error codes will appear on the remote control­ler display. If you use a wireless remote controller, the lamp on the photodetector unit
will output error codes by way of blinking patterns. See the lamp blinking patterns and
error codes in the table below.

OPERATION
lamp (green)

(1) (2)

(1) (4)

Error indications

TIMER lamp

(orange)

FILTER lamp

(red)

Wired Remote

Controller Error

code

Error contents

Remote controller
communication error

Network communication
error

Wired remote controller display

UTY-RNKY / UTY-RNKG / UTY-RNKYT (3-wire type)

Error code

UTY-RNRY / UTY-RNRG (2-wire type)

Error icon

Touch the [Next Page] (or [previous page])
to switch to other indoor unit information.

(1) (6)

(2) (6)

(2) (9)

(3) (1)

(3) (2)

(3) (10)

(4) (1)

(4) (2)

(5) (1)

(5) (2)

(5) (3)

(9) (15)

Peripheral unit
communication error

Indoor unit address
setting error

Connection unit number
error in wired remote
controller system

Indoor unit power supply
abnormal

Indoor unit main PCB
error

Indoor unit
communication circuit
(wired remote controller)
error

Indoor unit room temp.
thermistor error

Indoor unit heat ex.
temp. thermistor error

Indoor unit fan motor 1
error

Indoor unit coil
(expansion valve) error

Indoor unit water drain
abnormal

Outdoor unit
miscellaneous error

Touch the [Status].

2-digit numbers are corresponding to
the error code in the preceding table.

For more information, refer to the installation manual of the remote controller.

Touch the [Error Information].

UTY-RLRY / UTY-RLRG (2-wire type)

Error icon

Error code

For more information, refer to the installation manual of the remote controller.

For details on marking the ERROR CODES, please refer to the Manual of “IR Receiver
Unit” or “Wired Remote Controller”.

(13) (1) RB unit error

Display mode

( ) : Number of fl ashing

: 0.5s ON / 0.5s OFF

: 0.1s ON / 0.1s OFF

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