Fujitsu 9379123037-02 Installation Insrtuctions

INSTALLATION MANUAL

For authorized service personnel only.

INSTALLATIONSANLEITUNG

Nur für autorisiertes Personal.

MANUEL D'INSTALLATION

Pour le personnel agréé uniquement.

MANUAL DE INSTALACIÓN

Solo para personal autorizado.

MANUALE D'INSTALLAZIONE

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MANUAL DE INSTALAÇÃO

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AIR CONDITIONER

PART NO. 9379123037-02

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CAUTION!

This mark indicates procedures which, if improperly performed,
might possibly result in personal harm to the user, or damage to
property.

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.

Th

e 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.

This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning use of the appliance by a
person responsible for their safety. Children should be supervised to ensure that they do
not play with the appliance.

2. ABOUT THE UNIT

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.

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

Gauge manifold

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

Charging hose

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

Vacuum pump

• A conventional vacuum pump can be used by installing a
vacuum pump adapter.

Gas leakage

detector

• Special gas leakage detector for HFC refrigerant R410A.

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!

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

• 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.

Contents

1. SAFETY PRECAUTIONS .......................................................................................... 2

2. ABOUT THE UNIT ..................................................................................................... 2

2.1. Precautions for using the R410A refrigerant .......................................................2

2.2. Special tool for R410A ........................................................................................ 2

2.3. Accessories ........................................................................................................3

2.4. Optional parts .....................................................................................................3

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

3.1. Selecting an installation location ........................................................................3

3.2. Installation dimension .........................................................................................3

3.3. Installation the unit ..............................................................................................4

4.

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

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

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

4.3. Flare connection (Pipe connection) ....................................................................5

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

5. INSTALLING DRAIN PIPES ...................................................................................... 6

5.1. Installing drain pipes (Ceiling concealed type) ...................................................6

6. ELECTRICAL WIRING .............................................................................................. 7

6.1. Wiring system diagram .......................................................................................8

6.2. Connection cable preparation .............................................................................8

6.3. Connection of wiring ...........................................................................................8

7. REMOTE CONTROLLER SETTING .........................................................................9

7.1. Installing the remote controller ...........................................................................9

7.2. Setting the dip switches ...................................................................................... 9

8. FUNCTION SETTING.............................................................................................. 10

8.1. Turning on the power ........................................................................................10

8.2. Function setting ................................................................................................10

8.3. Group control system .......................................................................................12

8.4. Dual remote controllers ....................................................................................12

9. TEST RUN ............................................................................................................... 13

10. CHECK LIST ............................................................................................................ 13

11. OPTIONAL KIT INSTALLATION (OPTION) ............................................................. 13

12. CUSTOMER GUIDANCE ........................................................................................13

13. ERROR CODES ......................................................................................................14

INSTALLATION MANUAL

PART NO. 9379123037-02
INDOOR UNIT (Duct Type)

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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.

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

1

(This book)

Special nut A
(Large flange)

4

For suspending the indoor unit from
ceiling

Special nut B
(Small flange)

4

Coupler heat insulation (Large)

1

For indoor side pipe joint
(Gas pipe)

Coupler heat insulation (Small)

1

For indoor side pipe joint
(Liquid pipe)

Cable tie (Small)

1

For fixing the remote controller
cable

Remote controller

1

Screw

(M4 × 16)

2

For installing indoor unit remote
controller

Remote controller cable

1

For connecting the remote controller

2.4. Optional parts

Parts name Model No. Application

Simple remote controller UTY-RSN*M For air conditioner operation

Wired remote controller UTY-RNN*M For air conditioner operation

Remote sensor unit UTY-XSZX Room temperature sensor

External connect kit UTD-ECS5A For control input/output port

Long life fi lter UTD-LF60KA

3. INSTALLATION WORK

3.1. Selecting an installation location

Especially, the installation place is very important for the split type air conditioner be­cause it is very diffi cult to move from place to place after the fi rst installation.

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.

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, outdoor 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.)

• Decide the mounting position with the customer as follows:

(1) Install the indoor unit in a location having suffi cient strength to support 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) Locate 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 vibration is not amplifi ed.

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

where the fi lter can be removed.

(10) Providing as much space as possible between the indoor unit and the ceiling will

make work much easier.

3.2. Installation dimension

Install at least 20mm from the ceiling.

2500 or more
(When no
ceiling)

Floor

(Service space)

Unit : mm

450

20

or more

(For maintenance)

(1) Maintenance work of the control box is possible with the maintenance hole of the

measurement shown in the fi gure.

(2) If maintenance work is to be done from the bottom side, the maintenance hole needs

to be larger than the outside dimension of the indoor unit.

(3) If maintenance work is to be done from the top, keep the space of the more than

500 mm between the indoor unit and ceiling.

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450

500

500

Control box

Maintenannce hole

Unit : mm

3.3. Installation the unit

WARNING

• Install the air conditioner in a location which can withstand a load do 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.

CAUTION

• For installation, refer to the technical data.

RECOMMENDED RANGE OF

EXTERNAL STATIC PRESSURE [Pa]

100 - 250

3.3.1. Installing the hangers

Hanging bolt installation diagram

460

155

585

500

85

Unit : mm

AIR AIR

AIR

1,080

1,000

1,050

Hanging bolt M10
(Obtained locally)

Washer
(Obtained
locally)

Special nut A

Hanger

Special nut B

CAUTION

• Fasten the unit securely with special nuts A and B.

3.3.2. Leveling

Use the procedure in the following fi gure to adjust the levelness.

B

A

Level meter

The side A of the unit with the drain port should be slightly lower than the opposite side
B of the unit. The height difference between sides A and B should be from 0 to 20mm.

3.3.3. Mounting the duct

Follow the procedure in the following fi gure to install the ducts.

865

850

26

295

14

325

14

27

Intake port fl ange

Outlet port fl ange

Unit : mm

Spacing between fl ange and drain pan.

CAUTION

• If an intake duct is installed, take care not to damage the temperature sensor (the
temperature sensor is attached to the intake port fl ange).

• Be sure to install the air inlet grille and the air outlet grille for air circulation. The
correct temperature cannot be detected. Grills must be installed so that man cannot
touch unit fan, and cannot be removed by only hand operation with tool.

Air Inlet Grille

Air Outlet Grille

(Room)

Unit

• Be sure to install the air fi lter in the air inlet. If the air fi lter is not installed, the heat
exchanger may be clogged and its performance may decrease.

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4. PIPE INSTALLATION

CAUTION

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

• While brazing the pipes, be sure to purge with dry nitrogen gas.

4.1. Selecting the pipe material

CAUTION

• Do not use existing pipes.

• 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 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

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.

Diameter [mm (in.)]

Liquid

9.52 (3/8)

Gas

15.88 (5/8)

• 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 70-80 %, 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).

4.3. Flare connection (Pipe connection)

WARNING

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

4.3.1. Flaring

• Use special pipe cutter and fl are tool exclusive for R410A.
(1) Cut the connection pipe to the necessary length with a pipe cutter.
(2) Hold the pipe downward so that cuttings will not enter the pipe and remove any

burrs.

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

units respectively) onto the pipe and perform the fl are processing with a fl are tool.
Use the special R410A fl are tool, or the conventional fl are tool. Leakage of refriger-
ant may result if other fl are nuts are used.

(4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from

entering the pipes.

L

Die

Pipe

A

B

Check if [L] is fl ared uniformly
and is not cracked or scratched.

Pipe outside diameter

[mm (in.)]

Dimension A [mm]

Dimension B

-00.4

[mm]

Flare tool for R410A,

clutch type

6.35 (1/4)

0 to 0.5

9.1

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 fl are tools to fl are R410A pipes, the dimension A should be ap-
proximately 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.

Width across

fl ats

Pipe outside

diameter [mm (in.)]

Width across flats

of Flare nut [mm]

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

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.

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.

• Do not use mineral oil on fl ared part. Prevent mineral oil from getting into the system
as this would reduce the lifetime of the units.

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CAUTION

• There should be no gaps between the insulation and the unit.

• 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.

5. INSTALLING DRAIN PIPES

5.1. Installing drain pipes (Ceiling concealed type)

CAUTION

• Install the drain pipe in accordance with the instructions in this Installation Manual
and keep the area warm enough to prevent condensation. Problems with the piping
may lead to water leaks.

Install the drain pipes according to the measurements given in the following fi gure.
Flange positions for connecting the drain pipes.

139

123

108 41208

356

371

Main drain pipe
ø25.4 (O.D.)

Safety drain pipe
ø25.4 (O.D.)

Unit : mm

CAUTION

• This UNIT has drain ports in two locations. Follow the procedure in the figure to
connect drain pipes to each of them.

• Be sure to properly insulate the drain pipes.

Use general hard polyvinyl chloride pipe (VP25) and connect it with adhesive (polyvinyl
chloride) so that there is no leakage.
Do not perform air bleeding.
(1) Main drain pipe
Provide one trap on the main drain pipe near the indoor unit.

H1H2

Trap

Unit

H

1

= 100 mm (approx.)

H

2

= 50-100 mm

Drain pipe (main)

(2) Safety drain
There is no need to provide a trap for the safety drain pipe. If the safety drain pipe is
connected to the main drain pipe, make the connection below the trap on the main drain
pipe.

Drain pipe (main)

Drain pipe (safety)

Unit

•

Once installation is complete, check the fl ow of the drain water.

(1) Detach the caps and plugs from the pipes.
(2) Centering the pipe against port on the indoor unit, turn the fl are nut with your hand.

Flare nut

Connection pipe
(small)

Connection pipe
(large)

Flare nut

(3) 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.)

CAUTION

• 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.

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

• 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.

Tighten with 2 wrenches.

Holding wrench

Flare nut

Connection pipe

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)

4.4. Installing heat insulation

After checking for gas leaks, insulate by wrapping insulation around the two parts (Gas
and Liquid) of the indoor unit coupling, using the coupler heat insulation.
After installing the coupler heat insulation, wrap both ends with vinyl tape so that there is
no gap.
Secure both ends of the heat insulation material using nylon fasteners.

Coupler heat insulation (Small)

Coupler heat insulation (Large)

Indoor unit side

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6. ELECTRICAL WIRING

Cable Cable size (mm2) Type Remarks

Connection cable 1.5 (MIN.) Type 60245 IEC57 3Cable+earth (ground),

1φ230V

Max. Cable Length: Limit voltage drop to less than 2%. Increase cable gauge if voltage drop is
2% or more.

•

Install all electrical works in accordance to standard.

•

Install the disconnect device with a contact gap of at least 3mm in all poles nearby
the units. (Both indoor unit and outdoor unit)

•

Wiring size must comply with the applicable country or region's regulations.

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 indoor unit and
outdoor unit.

• 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, insufficient 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, insufficient 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 leakage may occur.)

• Install a 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.

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 a ground for the indoor and outdoor units and peripheral devices.

• Cut power (breaker) off.

• Touch metal part of the indoor and outdoor units for more than 10 seconds to

discharge static electricity charged in the body.

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

(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

Sleeve

Screw with
special washer

Screw with
special washer

Ring terminal

Cable

Cable

Terminal block

Ring terminal

Ring
terminal

WARNING

• 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.

Tightening torque [N·m (kgf·cm)]

M4 screw

1.2 to 1.8
(12 to 18)

M5 screw

2.0 to 3.0
(20 to 30)

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6.1. Wiring system diagram

•

Connection cable (to outdoor unit)

Control line

Power line

Earth (Ground) line

•

Wired remote controller cable

* Earth (Ground) the remote controller

(Please connect it when necessary.)

Red
White
Black

Indoor

unit side

CAUTION

Tighten the indoor unit connection cable and power supply indoor and outdoor unit,

terminal board connections fi rmly with the terminal board screws. Faulty connection
may cause a fi re.

If the indoor unit connection cable and power supply are wired incorrectly, the air

conditioner may be damaged.

Connect the indoor unit connection cable by matching the numbers of the outdoor and

indoor units terminal board numbers as shown in terminal label.

Earth (Ground) both the indoor and outdoor units by attaching an earth (ground) cable.

Unit shall be grounded in compliance with the country or region's regulations.

CAUTION

Be sure to refer to the above diagram for do correct fi eld wiring. Wrong wiring causes

malfunction of the unit.

Check local electrical rules and also any specifi c wiring instructions or limitation.

6.2. Connection cable preparation

Keep the earth (ground) wire longer than the other wires.

Power supply cable
or connection cable

30 mm

40 mm or more

Earth (Ground) wire

• Use a 4-core wire cable.

6.3. Connection of wiring

CAUTION

• Use care not to mistake the power supply cable and connection wires when installing.

• Install so that the wires for the remote controller will not come in contact with other
connection wires.

(1) Remove the control box cover and install each connection wire.

Control box cover

Loosen the screws
(2 locations)

(2) After wiring is complete, secure the remote controller cable, connection cable, and

power supply cable with the cable clamps.

(3) Install the control box cover.

Cable clamp

Remote controller
cable

Connection cable
(to outdoor unit)

CAUTION

• Do not bundle the remote controller cable, or wire the remote controller cable in
parallel, with the indoor unit connection wire (to the outdoor unit) and the power
supply cable. It may cause erroneous operation.

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.

7. REMOTE CONTROLLER SETTING

CAUTION

When detecting the room temperature using the remote con­troller, please set up the remote controller according to the
following conditions. If the remote controller is not located prop­erly, the correct room temperature will not be detected, and
thus abnormal conditions like “not cooled” or “not heated” will
occur even if the air-conditioner is running normally.

• Locate where an average temperature for the room being
air conditioned will be sensed.

• Do not locate directly exposed to the outlet air from the
air-conditioner.

• Locate out of direct sunlight.

• Locate away from the infl uence of other heat sources.

Do not touch the remote controller PC board and PC board parts directly with your hands

.

Do not wire the remote controller cable together with or parallel to the connection
cables, and power supply cable of the INDOOR UNIT and OUTDOOR UNIT. It may
cause erroneous operation.

When installing the bus wire near a source of electromagnetic waves, use shielded wire

.

Do not set the DIP switches, either on the air conditioner or the remote controller, in any
way other than indicated in this manual that is supplied with the air conditioner. Doing
so may result in improper operation.

7.1. Installing the remote controller

Open the operation panel on the front of the remote controller, remove the 2 screws indi­cated in the following fi gure, and then remove the front case of the remote controller.

When installing the remote controller, remove the connector from the front case. The
wires may break if the connector is not removed and the front case hangs down.

When installing the front case, connect the connector to the front case.

Screws

SET BACK

Front case
(back side)

Rear case

Connector

When remote controller cable is concealed
(1) Conceal the remote controller cable.
(2) Pass the remote controller cable through the hole in the rear case and connect the

remote controller cable to the remote controller terminal board specifi ed in fi gure.

(3) Clamp the remote controller cable sheath with the cable tie as shown in fi gure.
(4) Cut off the excess cable tie.
(5) Install the rear case to the wall, box, etc., with 2 screws fi gure.

Cable tie
(Small)

1. Red

2. White

3. Black

CAUTION

When connecting the remote controller

wires, do not overtighten the screws.

Hole

[Example]

Remote
controller cable

Box

Screws

Connector

Rear case

Ground the remote controller if it has a ground wire.

Wrap the connector and remote
controller wires with vinyl tape
or some other type of insulation
as shown in the fi gure.

Remote controller

Temperature
sensor

30

120

17

120

45.3

33.5

Hole

15.3

23

8

4.5

4.5

4.5 12.5

Hole × 3

Hole × 2

83.5

63.5

6

Unit: mm

CAUTION

Install the remote controller wires so as not to be direct touched with your hands.

Do not touch the remote controller PC board and PC board parts directly with your

hands.

7.2. Setting the dip switches

Set the remote controller DIP switches.

[Example]

ON

ON

OFF

1
2
3
4
5
6

DIP switch 1

Front case (back side)

NO.

SW state

Detail

OFF ON

DIP­switch 1

1

★

Cannot be used.
(Do not change)

2

★

Dual remote controller setting
* Refer to 8.4. Dual remote controllers

3

★

Cannot be used.
(Do not change)

4

★

Cannot be used.
(Do not change)

5

★

Cannot be used.
(Do not change)

6★ Invalidity Validity

Memory backup setting
* Set to ON to use batteries for the memory

backup. If batteries are not used, all of the
settings stored in memory will be deleted if
there is a power failure.

(★ Factory setting)

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8. FUNCTION SETTING

CAUTION

• Confi rm whether the wiring work for outdoor unit has been fi nished.

• Confi rm whether the cover for electric control box on the outdoor unit is close.

8.1. Turning on the power

(1) Check the remote controller wiring and DIP switch settings.

(2) Install the front case.

When installing the front case, connect the connector to the front case.

(3) Check the indoor and outdoor unit wiring and circuit board switch settings, and then

turn on the indoor and outdoor units. After “9C” has fl ashed on the set temperature
display for several seconds, the clock display will appear in the center of the remote
controller display.
The clock display will appear in the center of the remote controller display.

SUMOTUWETH FR

SA

8.2. Function setting

This procedure changes the function settings used to control the indoor unit according to
the installation conditions. Incorrect settings can cause the indoor unit to malfunction. This
procedure should be performed by authorized installation or service personnel only.

Perform the “FUNCTION SETTING” according to the installation conditions using the remote
controller. (Refer to the indoor unit installation manual for details on the function numbers
and setting values.)

(1) Press the SET TEMP. buttons (

) ( ) and FAN button simultaneously for more than

5 seconds to enter the function setting mode.

SUMOTUWETH FR

SA

(2) Press the SET BACK button to select the indoor unit number.

SUMOTUWETH FR

SA

Unit number of INDOOR UNIT

SET BACK

(3) Press the SET TIME ( ) buttons to select the function number.

Function number

SUMOTUWETH FR

SA

(4) Press the SET TEMP. buttons ( ) ( ) to select the setting value.

The display fl ashes as shown to the right during setting value selection.

Setting value

SUMOTUWETH FR

SA

(5) Press the TIMER SET button to confi rm the setting.

Press the TIMER SET button for a few seconds until the setting value stops fl ashing.
If the setting value display changes or if “- -” is displayed when the fl ashing stops, the
setting value has not been set correctly.
(An invalid setting value may have been selected for the indoor unit.)

(6) Repeat steps 2 to 5 to perform additional settings.

Press the SET TEMP. buttons (

) ( ) and FAN button simultaneously again for
more than 5 seconds to cancel the function setting mode. In addition, the func­tion setting mode will be automatically canceled after 1 minute if no operation is
performed.

(7) After completing the FUNCTION SETTING, be sure to turn off the power and turn it on

again.

CAUTION

• After turning off the power, wait 30 seconds or more before turning on it again. The
FUNCTION SETTING doesn’t become effective if it doesn’t do so.

• Function Details

(1) Filter Sign

The indoor unit has a sign to inform the user that it is time to clean the fi lter. Select the
time setting for the fi lter sign display interval in the table below according to the amount of
dust or debris in the room. If you do not wish the fi lter sign to be displayed, select the set-
ting value for “No indication”.

(♦... Factory setting)

Setting description

Function

number

Setting value

Standar d (2500 hours)

11

00

Long interval (5000 hours) 01

Short i nterval (1250 hours) 02

♦

No indication 03

(2) Cooling room temperature correction

Depending on the installed environment, the room temperature sensor may require a cor­rection.
The settings may be selected as shown in the table below.

(♦... Factory setting)

Setting description

Function

number

Setting value

♦

Standard

30

00

Warmer c ontrol 01

Slightl y lower control 02

Lower con trol 03

(3) Heating room temperature correction

Depending on the installed environment, the room temperature sensor may require a cor­rection.
The settings may be changed as shown in the table below.

(♦... Factory setting)

Setting description

Function

number

Setting value

♦

Standard

31

00

Warmer c ontrol 01

Slightl y warmer contr ol 02

Lower con trol 03

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(4) Auto restart

Enable or disable automatic system restart after a power outage.

(♦... Factory setting)

Setting description

Function

number

Setting value

♦

Yes

40

00

No 01

* Auto restart is an emergency function 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,
or external input device.

(5) Indoor room temperature sensor switching function

(Only for Wired remote controller)

The following settings are needed when using the Wired remote controller temperature
sensor.

(♦... Factory setting)

Setting description

Function

number

Setting value

♦

No

42

00

Yes 01

* If setting value is “00” :

Room temperature is controlled by the indoor unit temperature sensor.

* If setting value is “01” :

Room temperature is controlled by either indoor unit temperature sensor or remote con­troller unit sensor.

(6) External input control

“Operation/Stop” mode or “Forced stop” mode can be selected.

(♦... Factory setting)

Setting description

Function

number

Setting value

♦

Operation/Stop mode

46

00

(Setti ng forbid den) 01

Forced stop mode 02

(7) Room temperature control switching

• This setting is used to set the room temperature control method when the wired remote
controller is selected by the Indoor Room Temperature Sensor Switching Function.

(♦... Factory setting)

Setting description

Function

number

Setting value

♦

Control by the sensors of both the
indoor unit and the wired remote
controller.

48

00

Control only by the sensor of the
wired remote controller

01

Setting record

•

Record any changes to the settings in the following table.

Setting Setting Value

(1) Filter sign
(2) Cooling room temperature correction
(3) Heating room temperature correction
(4) Auto restart
(5) Indoor room temperature sensor switching

function
(6) External input control
(7) Room temperature control switching

After completing the FUNCTION SETTING, be sure to turn off the power and turn it on
again.

SETTING THE ROOM TEMPERATURE DETECTION
LOCATION

The detection location of the room temperature can be selected from the following 2 examples.
Choose the detection location that is best for the installation location.

A. Indoor unit setting (factory setting)

The room temperature is detected by the indoor unit temperature sensor

.

(1) When the THERMO SENSOR button is pressed, the lock display fl ashes because the

function is locked at the factory.

A

Indoor unit

B. Indoor unit/remote controller setting (room tempera-

ture sensor selection)

The temperature sensor of the indoor unit or the remote controller can be used to detect
the room temperature.

(1) Enable the room temperature sensor selection in FUNCTION SETTING, which will be

“(5) Indoor room temperature sensor switching function”.

(2) Press the THERMO SENSOR button for 5 seconds or more to select the temperature

sensor of the indoor unit or the remote controller.

B

Indoor unit

CAUTION



When select the “Remote controller setting”, if the detected
temperature value between the temperature sensor of the in­door unit and the temperature sensor of the remote controller
varies signifi cantly, it is likely to return to the control status of

temperature sensor of the indoor unit temporarily.



As the temperature sensor of remote controller detects the temperature near the
wall, when there is a certain difference between the room temperature and the
wall temperature, the sensor will not detect the room temperature correctly some­times.
Especially when the outer side of the wall on which the sensor is positioned is
exposed to the open air, it is recommended to use the temperature sensor of the
indoor unit to detect the room temperature when the indoor and outdoor tempera­ture difference is signifi cant.



The temperature sensor of the remote controller is not only used when there is a
problem in the detection of the temperature sensor of the indoor unit.

NOTES

If the function to change the temperature sensor is used as shown in examples A (other
than example B), be sure to lock the detection location. If the function is locked, the lock

display

will fl ash when the THERMO SENSOR button is pressed.

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8.3. Group control system

CAUTION

• When setting rotary switch, do not touch any other parts on the circuit board directly
with your bare hands.

• Be sure to turn off the main power.

A number of indoor units can be operated at the same time using a single remote control­ler.

(1) Wiring method (indoor unit to remote controller)

123

1

RWB

23

123 123 123

Indoor unit 0 Indoor unit 1 Indoor unit 2 Indoor unit 3

Bus wire

Remote
controller cable

Remote controller

When ground wire is necessary

(2) Rotary switch setting (indoor unit)
Set the unit number of each indoor unit using the rotary switch on the indoor unit circuit

board.

The rotary switch is normally set to 0.

Indoor unit

Rotary Switch

NOTE

Be sure to set the unit numbers sequentially.

(3) Remote controller setting

1. Turn on all of the indoor units.
* Turn on the indoor unit with the unit number 00 last. (Within 1 minute)

2. Set the refrigerant circuit address. (Assign the same number to all of the indoor units
connected to an outdoor unit.)

Refrigerant circuit

address

Function Number Setting Value

02 00~15

3. Set the “primary” and “secondary” settings. (Set the indoor unit that is connected to
the outdoor unit using a transmission cable as the “primary”.)

Function Number Setting Value

Primary

51

00

Secondary 01

4. After completing the function settings, turn off all of the indoor units, and then turn
them back on.

* If error code 21, 22, 24, or 27 is displayed, there may be an incorrect setting.

Perform the remote controller setting again.

NOTE

• When different indoor unit models are connected using the group control system, some

functions may no longer be available.

• If the group control system contains multiple units that are operated simultaneously, con-

nect and set the units as shown below.

• Auto-changeover operates under the same mode with model unit number 00.

• It should not be connected to any other Gr that is not of the same series (A**G only).

00 01 02 03 04 05

00 01 01 02 02 02

00 00 01 00 01 01

Outdoor

unit 1

Outdoor

unit 2

Outdoor

unit 3

Remote
controller

Refrigerant circuit
address

Primary/Secondary

Indoor
unit

Indoor
unit

Indoor
unit

Indoor
unit

Indoor
unit

Indoor
unit

Standard

pair

Simultaneous

twin

Simultaneous

triple

: Transmission cable, Power supply cable : Power supply cable

: Remote controller cable : Bus wire

Rotary switch setting
(unit number)

Remote controller
setting

* Make sure that the indoor unit with the unit number 00 is connected to the outdoor unit

using a transmission cable.

8.4. Dual remote controllers

• Two separate remote controllers can be used to operate the indoor units.

• The timer and self-diagnosis functions cannot be used on the secondary units.

(1) Wiring method (indoor unit to remote controller)

1 231 23

RWB RWB

1 2 3

Remote controller

Remote controller cable

Indoor unit

Primary unit

Secondary

unit

When ground wire
is necessary

(2) Remote controller DIP switch 1 setting
Set the remote controller DIP switch 1 No. 2 according to the following table.
(Refer to 7.2. Setting the dip switches)

Number of remote

controllers

Primary unit Secondary unit

DIP SW 1 No. 2 DIP SW 1 No. 2

1 (Normal) OFF –

2 (Dual) OFF ON

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9. TEST RUN

CHECK ITEMS

(1) Is operation of each button on the remote controller normal?
(2) Is the drain normal?
(3)

Is there any abnormal noise and vibration during operation?

• Do not operate the air conditioner in test run for a long time.

[OPERATION METHOD]

• For the operation method, refer to the operating manual.

(1) Stop the air conditioner operation.
(2)

Press the MODE button and the FAN button simultaneously for 2 seconds or more to
start the test run.

Test run display

(3) Press the START/STOP button to stop the test run.
If “C0” appears in the unit number display, there is a remote controller error. Refer to the

installation manual included with the remote controller.

Unit number Error code Content

Incompatible indoor unit is connected

Indoor unit ↔ remote controller communication
error

10. 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 CHECK BOX

Has the indoor unit been
installed correctly?

Vibration, noise, indoor unit
may drop

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

No cooling, No heating

Has heat insulation work been
completed?

Water leakage

Does water drain easily from
the indoor units?

Water leakage

Are the wires and pipes all
connected completely?

No operation, heat or burn
damage

Is the connection cable the
specifi ed thickness?

No operation, heat or burn
damage

Are the inlets and outlets free
of any obstacles?

No cooling, No heating

After installation is completed,
has the proper operation and
handling been explained to
the user?

11. OPTIONAL KIT INSTALLATION (OPTION)

WARNING

Regulation of cable differs from each locality, refer in accordance with local
rules.

This air conditioner can be connected with the following optional kits.

Option type Connector No.

UTY-XSZX (Remote sensor unit) CN8

UTD-ECS5A (External input) CN114

UTD-ECS5A (External output) CN115

UTD-ECS5A (Preparation) CN5, CN106

(CN8)

(CN115)(CN114)

Remote controller
cable

Connection cable
(to outdoor unit)

(CN106)

(CN5)

12. CUSTOMER GUIDANCE

Explain the following to the customer in accordance with the operating manual:

(1) Starting and stopping method, operation switching, temperature adjustment, timer, air

fl ow switching, and other remote controller operations.

(

2) Air fi lter removal and cleaning, and how to use the air louvers.

(3) Give the operating and installation manuals to the customer.

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13. ERROR CODES

[Troubleshooting at the remote controller LCD]

This is possible only on the wired remote controller.

[Self-diagnosis]

If an error occurs, the following display will be shown.(“Er” will appear in the set room

temperature display.)

Error codeUnit number of indoor unit

EX. Self-diagnosis

Wired remote

controller

Error code

Description

Serial communication error

Wired remote controller communication error

Check run unfi nished

Unit number or Refrigerant circuit address setting error
[Simultaneous Multi]

Indoor unit capacity error

Combination error

• Connection unit number error (indoor secondary unit)

[Simultaneous Multi]

• Connection unit number error (indoor unit or branch unit) [Flexible
Multi]

Primary unit, secondary unit set-up error [Simultaneous Multi]

Power supply interruption error

Indoor unit PCB model information error

Manual auto switch error

Room temp. sensor error

Indoor unit Heat Ex. Middle temp. sensor error

Indoor unit fan motor error

Drain pump error

Damper error

Indoor unit error

Outdoor unit main PCB model information error or communication
error

Inverter error

Active fi lter error, PFC circuit error

Trip terminal L error

Display PCB microcomputers communication error

Discharge temp. sensor error

Compressor temp. sensor error

Outdoor unit Heat Ex. liquid temp. sensor error

Outdoor temp. sensor error

Suction Gas temp. sensor error

• 2-way valve temp. sensor error

• 3-way valve temp. sensor error

Heat sink temp. sensor error

• Sub-cool Heat Ex. gas inlet temp. sensor error

• Sub-cool Heat Ex. gas outlet temp. sensor error

Liquid pipe temp. sensor error

Current sensor error

• Discharge pressure sensor error

• Suction pressure sensor error

• High pressure switch error

Trip detection

Compressor rotor position
detection error (permanent stop)

Outdoor unit fan motor 1 error

Outdoor unit fan motor 2 error

4-way valve error

Coil (expansion valve) error

Discharge temp. error

Compressor temp. error

High pressure error

Low pressure error

Branch boxes error
[Flexible Multi]

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