3 INSTALLING THE COUPLERHEAT INSULATION

Body

Be sure to overlap theinsulation

Coupler heat insulation

No gap

Coupler heat insulation

After checking for gas leaks, insulate by wrapping insulation around thetwo parts (gas and liquid) of the indoor unit coupling, using the couplerheat insulation.After installing the coupler heat insulation, wrap both ends with vinyl tapeso that there is no gap.

CAUTION

Must fit tightly against body without any gap.

This air conditioner uses new refrigerant HFC (R410A).The basic installation work procedures are the same as conventional refrigerant models.However, pay careful attention to the following points:

1 Since the working pressure is 1.6 times higher than that of conventional refrigerant models, some of the piping andinstallation and service tools are special. (See the table below.)Especially, when replacing a conventional refrigerant model with a new refrigerant R410A model, always replace theconventional piping and flare nuts with the R410A piping and flare nuts.

2 Models that use refrigerant R410A have a different charging port thread diameter to prevent erroneous charging withconventional refrigerant and for safety. Therefore, check beforehand. [The charging port thread diameter for R410A is1/2 UNF 20 threads per inch.]

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

4 When charging the refrigerant, take into account the slight change in the composition of the gas and liquid phases, andalways charge from the liquid phase side whose composition is stable.

Special tools for R410A

Copper pipes

SPLIT TYPE AIR CONDITIONER

INSTALLATIONINSTRUCTION SHEET(PART NO. 9374318414)For authorized service personnel only.

Cassette TypeCONNECTION PIPEREQUIREMENT

ELECTRICAL REQUIREMENT

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 248 °F. (Re-verse cycle model only)In addition, if the humidity level at the installation lo-cationof the refrigerant piping is expected to exceed 70%, installheat insulation around the refrigerant pip-ing. If the ex-pected humidity level is 70-80%, use heat insulation thatis 15 mm (19/32”) or thicker and if the expected humidityexceeds 80%, use heat insulation that is 20 mm (3/4”) orthicker.If heat insulation is used that is not as thick as speci-fied,condensation may form on the surface of the insulation.In addition, use heat insulation with heat conductivity of0.045 W/(m•K) or less (at 68 °F).

Always make the air conditioner power supply a special branch circuit andprovide a special switch and receptacle. Do not extend the power cord.

1 INDOOR UNIT INSTALLATION

WARNING

1 Install the air conditioner in a location which can with-stand a load do at least five times the weight of themain unit and which will not amplify sound or vibra-tion. If the installation location is not strong enough,the indoor unit may fall and cause injuries.

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

1. INSTALLING BODY

Cealing openings and hanging bolt installation diagram

WARNING

When fastening the hangers, make the bolt positions uni-form.

(1) Install the indoor unit on a place having a sufficient strength so that itwithstands against the weight of the indoor unit.

(2) The inlet and outlet ports should not be obstructed; the air should beable to blow all over the room.

(3) Leave the space required to service the air conditioner.(4) The ceiling rear height as shown in the figure.(5) A place from where the air can be distributed evenly throughout the

room by the unit.(6) A place from where drainage can be extracted outdoors easily.(7) Install the unit where noise and vibrations are not amplified.

(1) Install special nut A, then special nut B onto the hanging bolt.(2) Raise the body and mount its hooks onto the hanging bolt between

the special nuts.(3) Turn special nut B to adjust the height of the body.

WARNING

Perform final tightening by tightening the double nut firmly.

Vinyl hose

2. LEVELING

Using a level, or vinyl hose filled with water, fine adjust so that the body islevel.

3. INSTALLING DRAIN PIPE

Note: Install the drain pipe.••••• Install the drain pipe with downward gradient (1/50 to 1/100) and so

there are no rises or traps in the pipe.••••• Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32

mm (1-1/4”)] and connect it with adhesive (polyvinyl chloride) so thatthere is no leakage.

••••• When the pipe is long, install supporters.••••• Do not perform air bleeding.••••• Always heat insulate the indoor side of the drain pipe.••••• When desiring a high drain pipe height, raise it up to 700 mm (28") or

less from the ceiling within a range of 150 mm (6") from the body. Arise dimension over this range will cause leakage.

INSTALLATION PROCEDUREInstall the air conditioner as follows:

••••• Use pipe with water-resistant heat insulation.

(Continued to the next page)

530 mm (20.85") (Hanging bolt position)

540

mm

(21.

25")

(Han

gin g

bol

t pos

ition

)

570

mm

(22

.43"

) ( I

ndoo

r un

it)

58 0

– 6

6 0 m

m ( 2

2.82

- 25

.97"

) (Ce

alin

g op

e nin

gs)

700

mm

(27

.56"

) (D

ecor

atio

n P

anel

)

135 mm (5.31") 250 mm (9.84")

75 m

m (

2.95

")

Drain pipe (O.D. ø25.4)(1")

40 mm (1.57") 99 mm (3.90")102 mm (4.01")

114

mm

(4.4

9")

215

mm

(8.4

6")

30 m

m(1

1.80

" )

262

mm

( 10.

31")

3 0 m

m ( 1

.18"

)

58 m

m (2

.28 "

)

123

mm

(4.8

4")

CeilingControl box

Liquid pipe Gas pipe

Contents of changePressure is high and cannot be measured with a conventional gauge. To prevent erroneous mixing of otherrefrigerants, the diameter of each port has been changed.It is recommended the gauge with seals –0.1 to 5.3 MPa (–76 cmHg to 53 kgf/cm2) for high pressure. –0.1 to3.8 MPa (–76 cmHg to 38 kgf/cm2) for low pressure.To increase pressure resistance, the hose material and base size were changed.A conventional vacuum pump can be used by installing a vacuum pump adapter.Special gas leakage detector for HFC refrigerant R410A.

Tool name

Gauge manifold

Charge hoseVacuum pump

Gas leakage detector

It is necessary to use seamless copper pipes and it is desirable that theamount of residual oil is less than 40 mg/10 m. Do not use copper pipeshaving a collapsed, deformed or discolored portion (especially on the interiorsurface). Otherwise, the expansion valve or capillary tube may becomeblocked with contaminants.As an air conditioner using R410A incurs pressure higher than whenusing 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 that in the table even when it isavailable on the market.

6.35 mm (1/4 in.)

9.52 mm (3/8 in.)

12.70 mm (1/2 in.)

15.88 mm (5/8 in.)

19.05 mm (3/4 in.)

0.80 mm (0.0315 in.)

0.80 mm (0.0315 in.)

0.80 mm (0.0315 in.)

1.00 mm (0.0394 in.)

1.20 mm (0.0472 in.)

Pipe outside diameter Thickness

Thicknesses of Annealed Copper Pipes (R410A)

For authorized service personnel only.

WARNING

1 For the air conditioner to operate satisfactorily, install it as outlined in this installation instruction sheet.

2 Connect the indoor unit and outdoor unit with the air conditioner piping and cords available from our standards parts. Thisinstallation instruction sheet describes the correct connections using the installation set available from our standard parts.

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

4 Do not turn on the power until all installation work is complete.

CAUTION

This installation instruction sheet describes how to the indoor unit only.To install the outdoor unit, refer to the installation instruction sheet included with the outdoor unit.

••••• Be careful not to scratch the air conditioner when handling it.••••• After installation, explain correct operation to the customer, using the operating manual.••••• Let the customer keep this installation instruction sheet because it is used when the air conditioner is serviced or moved.

IMPORTANT!Please Read Before StartingThis air conditioning system meets strict safety and operating standards.As the installer or service person, it is an important part of your job toinstall or service the system so it operates safely and efficiently.

For safe installation and trouble-free operation, you must:

• Carefully read this instruction booklet before beginning.• Follow each installation or repair step exactly as shown.• Observe all local, state, and national electrical codes.• Pay close attention to all danger, warning, and caution notices given in

this manual.

This symbol refers to a hazard or unsafe practice whichcan result in severe personal injury or death.

This symbol refers to a hazard or unsafe practice whichcan result in personal injury and the potential forproduct or property damage.

• Hazel alerting symbols

Electrical

Safety/alert

If Necessary, Get HelpThese instructions are all you need for most installation sites and mainte-nance conditions. If you require help for a special problem, contact oursales/service outlet or your certified dealer for additional instructions.

In Case of Improper InstallationThe manufacturer shall in no way be responsible for improper installationor maintenance service, including failure to follow the instructions in thisdocument.

SPECIAL PRECAUTIONS

When WiringELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY ORDEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULDATTEMPT TO WIRE THIS SYSTEM.

• Do not supply power to the unit until all wiring and tubing are completedor reconnected and checked.

• Highly dangerous electrical voltages are used in this system. Carefully referto the wiring diagram and these instructions when wiring. Improperconnections and inadequate grounding can cause accidental injury or death.

• Ground the unit following local electrical codes.• Connect all wiring tightly. Loose wiring may cause overheating at con-

nection points and a possible fire hazard.

WARNING:

CAUTION:

When TransportingBe careful when picking up and moving the indoor and outdoor units. Geta partner to help, and bend your knees when lifting to reduce strain onyour back. Sharp edges or thin aluminum fins on the air conditioner cancut your fingers.

When Installing......In a Ceiling or WallMake sure the ceiling/wall is strong enough to hold the unit’s weight. Itmay be necessary to construct a strong wood or metal frame to provideadded support.

...In a RoomProperly insulate any tubing run inside a room to prevent “sweating” thatcan cause dripping and water damage to walls and floors.

...In Moist or Uneven LocationsUse a raised concrete pad or concrete blocks to provide a solid, levelfoundation for the outdoor unit. This prevents water damage and abnor-mal vibration.

...In an Area with High WindsSecurely anchor the outdoor unit down with bolts and a metal frame.Provide a suitable air baffle.

...In a Snowy Area (for Heat Pump-type Systems)Install the outdoor unit on a raised platform that is higher than driftingsnow. Provide snow vents.

When Connecting Refrigerant Tubing

• Keep all tubing runs as short as possible.• Use the flare method for connecting tubing.• Apply refrigerant lubricant to the matching surfaces of the flare and

union tubes before connecting them, then tighten the nut with a torquewrench for a leak-free connection.

• Check carefully for leaks before starting the test run.

NOTE:Depending on the system type, liquid and gas lines may be either narrowor wide. Therefore, to avoid confusion the refrigerant tubing for yourparticular model is specified as either “small” or “large” rather than as“liquid” or “gas”.

When Servicing

• Turn the power OFF at the main circuit breaker panel before openingthe unit to check or repair electrical parts and wiring.

• Keep your fingers and clothing away from any moving parts.• Clean up the site after you finish, remembering to check that no metal

scraps or bits of wiring have been left inside the unit being serviced.• After installation, explain correct operation to the customer, using the

operating manual.

DANGER

Never touch electrical components immediately after the power supply has been turned off. Electrical shock may occur. Afterturning off the power, always wait 5 minutes or more before touching electrical components.

WARNING

Select installation locations that can properly support theweight of the indoor. Install the units securely so that theydo not topple or fall.

CAUTION

1 Do not install where there is the danger of combustiblegas leakage.

2 Do not install the unit near heat source of heat, steam,or flammable gas.

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

SELECTING THE MOUNTINGPOSITIONDecide the mounting position with the customer as follows:

Discharge Direction Setting

• The discharge direction can be selected as shown below.

* For a 3-way outlet, make sure to perform the Function Setting on theremote control. Also, make sure to use the optional shutter panel toblock the outlet.

* The ceiling height cannot be set in the 3-way outlet mode. Therefore,do not change the setting in the “Setting the Ceiling Height” at 7 FUNC-TION SETTING.

* When the outlet is shut, be sure to install the optional Air outletshutter plate kit.For the details of installation, please refer to Installation Manual of kit.

Obstruction

2,40

0 m

m -

2,7

00 m

m(9

4.4

- 10

6.2"

)

1,000 mm (39")or more

1,00

0 m

m (

39")

or m

ore

Floor

Strong and durable ceiling

262 mm (10.3")or more

(4 directions) (3 directions)

100 mm (4") or more

Piping position

MODELDiameter

Liquid Gas9,000/12,000BTU/h model

6.35 mm (1/4 in.) 9.52 mm (3/8 in.)

18,000BTU/h model

6.35 mm (1/4 in.) 12.70 mm (1/2 in.)

CAUTION

Refer to the installation instruction sheet of the outdoorunit for description of the length of connecting pipe or fordifference of its elevation.

Q’ty

2

4

4

1

1

1

1

1

1

Name and Shape

Coupler heatinsulation

Special nut A(large flange)

Special nut B(small flange)

Template(Carton top)

Drain Hose Assy

Hose Band Assy

Wired RemoteController

Remote ControllerCord(*1)

Tapping screw(ø4 × 16)

Application

For indoor side pipe joint

For installing indoor unit

For installing indoor unit

For cealing openingscuttingAlso used as packing

For installing drain pipe

For installing drain pipe

For connecting theremote controller

For installing the remotecontroller

STANDARD PARTSThe following installation parts are furnished.Use them as required.

INDOOR UNIT ACCESSORIES

DECORATION PANEL ACCESSORIES

Q’ty

4

4

1

Name and Shape

Connector cover

Screw

Screw

Application

For covering connector

For mounting decorationpanel

For mounting connectorcover

OPTIONAL PARTS

Model No.

UTY - LNHFV1

UTR - YDZB

Exterior Summary

For air conditioner operation

Install the plate at outletwhen carrying out 3-waydirection operation.

Parts name

Remotecontrol unit

Air outletshutter plate

The pipes are shaped by your hands. 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 difficult to bend or stretch them any more. Do not bend or

stretch the pipes more than three times.

CAUTION

1 To prevent breaking of the pipe, avoid sharp bends.Bend the pipe with a radius of curvature of 150 mm (6") or over.

2 If the pipe is bent repeatedly at the same place, it willbreak.

2. BENDING PIPES

(3) When the flare nut is tightened properly by your hand, use a torquewrench to finally tighten it.

Torque wrench

Holding spanner

Body side

CAUTION

Hold the torque wrench at its grip, keeping it in the rightangle with the pipe, in order to tighten the flare nutcorrectly.

Indoor unit

Connection pipe(Liquid)

Connection pipe(Gas)

(2) Centering the pipe against port on the indoor unit, turn the flare nutwith your hand.

Flare nut Tightening torque

6.35 mm (1/4 in.) dia.

9.52 mm (3/8 in.) dia.

12.70 mm (1/2 in.) dia.

15.88 mm (5/8 in.) dia.

19.05 mm (3/4 in.) dia.

3. CONNECTION PIPESIndoor unit(1) Detach the caps and plugs from the pipes.

CAUTION

1 Be sure to apply the pipe against the port on the in-door unit correctly. If the centering is improper, the flarenut cannot be tightened smoothly. If the flare nut isforced to turn, the threads will be damaged.

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

16 to 18 N·m (160 to 180 kgf·cm)

30 to 42 N·m (300 to 420 kgf·cm)

49 to 61 N·m (490 to 610 kgf·cm)

63 to 75 N·m (630 to 750 kgf·cm)

90 to 110 N·m (900 to 1100 kgf·cm)

CONNECTING THE PIPE

CAUTION

1 Do not use mineral oil on flared part. Prevent mineraloil from getting into the system as this would reducethe lifetime of the units.

2 While welding the pipes, be sure to blow dry nitrogengas through them.

1. FLARING(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 the burrs.(3) Insert the flare nut (always use the flare nut attached to the indoor

and outdoor units respectively) onto the pipe and perform the flareprocessing with a flare tool.Use the special R410A flare tool, or the conventional flare tool.

Width acrossflats

6.35 mm (1/4 in.)

9.52 mm (3/8 in.)

12.70 mm (1/2 in.)

15.88 mm (5/8 in.)

19.05 mm (3/4 in.)

0 to 0.5

Pipe outside diameterDimension A (mm)

Flare tool for R410A, clutch type

6.35 mm (1/4 in.)

9.52 mm (3/8 in.)

12.70 mm (1/2 in.)

15.88 mm (5/8 in.)

19.05 mm (3/4 in.)

9.1 (0.3583 in.)

13.2 (0.5197 in.)

16.6 (0.6536 in.)

19.7 (0.7756 in.)

24.0 (0.9443 in.)

Pipe outside diameter Dimension B

When using conventional flare tools to flare R410A pipes, the dimensionA should be approximately 0.5 mm more than indicated in the table (forflaring with R410A flare tools) to achieve the specified flaring. Use a thick-ness gauge to measure the dimension A.

Pipe outsidediameter

Width across flatsof Flare nut

2

17 mm (0.6693 in.)

22 mm (0.8661 in.)

26 mm (1.0236 in.)

29 mm (1.1417 in.)

36 mm (1.4164 in.)

6.35 mm (1/4 in.)

9.52 mm (3/8 in.)

12.70 mm (1/2 in.)

15.88 mm (5/8 in.)

19.05 mm (3/4 in.)

••••• Set up the entire piping lines at the position 100 mm lower than themain body drain port, and use the piping lines VP30 or more with thedescending inclination to 1/100 or more.

Max. 700 mm (28")

Rise

Trap

Supporter

1.5 to 2.0 m(5 to 6.5 ft)Air bleeding 150 mm (6") or less

Special nut A

Special nut BHook

Hanging bolt30 mm (1.18")or more

After installing thebody, tighten the nuts.

19 mmCeiling

Prohibitions X air bleeding

X over mountain

X trap

VP251/100~1/50

1.5m~2m(5ft - 6ft) Hanging fitting

Downward gradient

VP25(Localarrangement)

850

(33”

) mm

or l

ess

300mm (12”) or lessDownward gradient1/100 and above

Attached drain hoseAttached band

Horizontal or

upward gradient

850

mm

(33”

)or

less

VP30 or moreDownward gradient 1/100 or more

Note)Check for drainagePour about 1 liter of water from the position shown in the diagram or fromthe airflow outlet to the dew tray. Check for any abnormalities such asstrange noises and whether the drain pump functions normally.

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 andthe drain piping final outlet on the body.

Working procedure1) Install the attached drain hose to the drain port of the body. Install the

hose band from the top of the hose within the graphic display area.Tighten until the A dimension is mm and below.

2) Use vinyl adhesive agent to glue the drain piping (PVC pipe VP25)which is prepared on site or elbow socket.(Apply color adhesive agent evenly until the gauge line and seal)

3) Check the drainage. (See separate diagram)4) Install the heat insulation.5) Use the attached heat insulation to insulate the drain port and band

parts of the body.

CAUTION• Do not apply adhesive agent on the drain port of the

body. (Use the attached drain hose and connect thedrain piping)

1. WIRING SYSTEM DIAGRAM

Power supply cordor connection cord

20 mm

30 mm or more

Earth wire

• Use a 4-core wire cord.

Keep the earth wire longer than the other wires.

2. CONNECTION CORD PREPARATION

3. CONNECTION OF WIRING(1) Remove the control box cover and install each connection wire

Screw Control box cover

Check if [L] is flared uniformlyand is not cracked or scratched. B

Die

A

Pipe

ELECTRICAL WIRING

WARNING

1 Before starting work, check that power is not beingsupplied to the indoor unit and outdoor unit.

2 Match the terminal board numbers and connectioncord colors with those of the outdoor unit.Erroneous wiring may cause burning of the electric parts.

3 Connect the connection cords firmly to the terminalboard. Imperfect installation may cause a fire.

4 Always fasten the outside covering of the connectioncord with the cord clamp. (If the insulator is chafed,electric leakage may occur.)

5 Always connect the ground wire.

6 Install the remote controller wires so as not to be di-rect touched with your hand.

HOW TO CONNECT WIRING TO THE TERMINALSFor stand wiring(1) Use crimp-type terminals with insulating sleeves as shown in

thefigure below to connect to the terminal block.(2) Securely crimp the crimp-type terminals to the wires using an ap-

propriate tool so that the wires do not come loose.(3) Use the specified wires, connect them securely, and fasten themso

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 screwheadsmay be damaged and prevent the screws from being prop-erly tightened.

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

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

4Connection cord (to outdoor unit)

Wired remote controller cord

Power line

Control line

321

Indoorunit side

* Ground the remote controller ip it has a ground wire

BlackWhiteRed

321

*

Indoorunit side

123

123

GG

123

L2L1

Pow

er s

uppl

y lin

eS

ingl

e-ph

ase,

230

/208

V

INDOOR

INDOOR UNIT

OUTDOOR UNIT

TERMINAL

DISCON-NECTSWITCH(FIELDSUPPLY)

Groundingline

14AWG(Inter-unit)Power lines

230/208 V

230/208 V

230/208 VTERMINAL

CIRCUITBREAKEROR FUSE(FIELDSUPPLY)

Rem

ote

cont

rol le

r lin

e

CAUTION

Use 14AWG for connection cord.

Strip 10 mm

Sleeve

Crimp-typeterminal

Wire

Screw withspecial washer

Crimp-type terminal

Terminalboard Wire

Screw withspecial washer

Crimp-typeterminal

Terminal block

WARNING

Use crimp-type terminals and tighten the terminalscrewsto the specified torques, otherwise, abnor-mal overheat-ing may be produced and possiblycause heavy dam-age inside the unit.

Tighting torque

M4 screw 1.2 to 1.8 N·m (12 to 18 kgf·cm)

Attached heatinsulation

Attachedhose band

Install the bolt faces upward

Attached drain hose heat insulation

Locally arranged vinyl pipe

Attached drain hose

(a )

(c )

(d )(b )

10 - 15 mm(0.39-0.59”)

5-10

VP25

35 mm(1.38”)

4 mm(0.16”) or less Transparentvisible portion margin

Insertion

Applying area of adhesive

Gauge line

Wind the attached heat insulation around the hose band

Make sure the alignment is on topMake sure there

are no gaps

Make sure there are no gaps

(a)Top view

(c)Top view

(b)Side view

(d)Hose opening view

35 mm (1.38”)

Tighte

n 25m

m an

d abo

ve

(0.20

- 0.39

”)

••••• Be sure to leave maintenance space for future service at the desig-nated position.

150

mm

~ 2

00 m

m (5

.91"

~ 7

.87"

)M

in. 4

50 m

m (

17.7

2")

Min. 450 mm (17.72")

Maintenance space

08M154_9374318414_1.p65 2009.02.03, 11:241

DECORATION PANELINSTALLATION

1. REMOVE THE INTAKE GRILLE

(1) Slide the 2 grille hook

Grille hook

(2) Open the intake grille and remove. (2) Connect the connector.

• Arrange the wires as illustrated below.

(3) Attach the connector cover.

3. ATTACH THE INTAKE GRILLE

The installation is the reverse of “REMOVING THE INTAKE GRILLE”.The intake grille can be rotated and installed 4 ways to suit the user’spreference.

CAUTION

Use only the supplied screws to install the decorationpanel.

Indoor unit

Cealing

No gap between cealing anddecoration panel around entireperiphery

5 ~

7 m

m(0

.2 -

0.2

8")

Decoration panel

Sealant

2. INSTALL PANEL TO INDOOR UNIT

(1) Install the decoration panel on the indoor unit.

* Align the stamped marks on the decoration panel against the pipe and the drainof the indoor unit.

“DRAIN” mark “PIPE” mark

Screw

CAUTION

1 The louver angle cannot be changed if the power is noton, (If moved by hand, it may be damaged.)

2 The grille assembly is directional relative to the air con-ditioner body.

3 Install so that there is no gap between the grille as-sembly and the air conditioner body.

4 The decoration panel equips with an accessory to pre-vent the grill completely open. Be sure to read the IN-STALLATION SHEET included with the decoration panelbefore installation.

Wire (louver): WHITEWire (display): WHITE

Wire (louver): RED

Indoor unit side

ScrewConnector cover

CAUTION

Do not bundle the remote controller cord, or wire the re-mote controller cord in parallel, with the indoor unit con-nection wire (to the outdoor unit) and the power supplycord. It may cause erroneous operation.

(2) After wiring is complete, secure the remote controller cord, connec-tion cord, and power cord with the cord clamps.

(3) Install control box cover.

Connection cord(to outdoor unit)

Wired remote controller cord

TEST RUN

CHECK ITEMS

(1) Is operation of each button on the remote control unit normal?(2) Does each lamp light normally?(3) Do not air flow direction louvers operate normally?(4) Is the drain normal?(5) Is there any abnormal noise and vibration during operation?

• Do not operate the air conditioner in the running state for a long time.

CHECKING DRAINAGE

To check the drain, remove the water cover and fill with 1rof water asshown in the figure.The drain pump operates when operating in the cooling mode.

Wire coverDrain pipe

Watering pot

• Test running

When the air conditioner is run by pressing the remote control unit testrun button, the OPERATION and TIMER lamps flash slowly at the sametime.

Screw

PART NO. 9374318414

9 SPECIAL INSTALLATIONMETHODS

CAUTION

1 When setting DIP switches, do not touch any other partson the circuit board directly with your bare hands.

2 Be sure to turn off the main power.

1. GROUP CONTROL SYSTEM

A number of indoor units can be operated at the same time using asingle remote controller.(1) Wiring method (indoor unit to remote controller)

Remote controller

Bus wire

Remotecontroller cord

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

When ground wire is necessary

1 2 3

1 2 3

1 2 3 1 2 3 1 2 3

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

1

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

2

OFF

OFF

ON

ON

OFF

OFF

ON

ON

OFF

OFF

ON

ON

OFF

OFF

ON

ON

3

OFF

OFF

OFF

OFF

ON

ON

ON

ON

OFF

OFF

OFF

OFF

ON

ON

ON

ON

4

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

ON

ON

ON

ON

ON

ON

ON

ON

Unit number DIP SWITCH No.

Indoor unit

3 4

ON

1 2

Example : No. 3

(2) DIP switch setting (indoor unit)Set the unit number of each indoor unit using DIP switch on the indoorunit circuit board. (see following table and figure.)DIP switch is normally set to make unit number No. 0.

REMOTE CONTROLLERSETTING

CAUTION

1 In order to detect the room tempera-ture correctly when using the tempera-ture sensor of the remote controller, donot install the remote controller in aplace where it will be exposed to directsunlight or directly below the air outletof the indoor unit.

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

3 Do not wire the remote controller cord and the bus wiretogether with or parallel to the connection cables, trans-mission cords, and power supply cords of the indoorand outdoor units. It may cause erroneous operation.

4 When installing the bus wire near a source of electro-magnetic waves, use shielded wire.

5 Do not set the DIP switches, either on the air conditioneror the remote controller, in any way other than indicatedin this sheet or the manual that is supplied with the airconditioner. Doing so may result in an accident.

Screws

Front case(back side) Rear case

Connector

SET BACK

1. INSTALLING THE REMOTE CONTROLLER

Open the operation panel on the front of the remote controller, remove thetwo screws indicated in the following figure, and then remove the frontcase of the remote controller.

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

Binder(Small)

CAUTIONWhen connecting the remotecontroller wires, do notovertighten the screws.

1. Red2. White

3. BlackHole

t

Temperature sensor

When remote controller cord is embedded(1) Embed the remote controller cord and box.(2) Pass the remote controller cord through the hole in the rear case and

connect the remote controller cord to the remote controller terminalboard specified in figure.

(3) Clamp the remote controller cord sheath with the binder as shown infigure.

(4) Cut off the excess binder.(5) Install the rear case to the wall, box, etc., with two screws figure.

Remotecontroller cord

Box

Screws

Connector

Rear case

[Example]

Wrap the connector and remotecontroller wires with vinyl tape orsome other type of insulation asshown in the figure.

Ground the remote controller if it has aground wire.

Unit: mm

83.5

15.3

63.5

Hole

45.3

4.5 8

12.5

Hole × 2Hole × 3

4.5

4.5

6

30 33.5

23120

120

17

ON

ON

OFF

123456

2. SETTING THE DIP SWITCHES

Set the remote controller DIP switches.

[Example]

DIP switch 1

Front case (back side)

Do not use thisDIP switch 2

CAUTION

1 Install the remote controller wires so as not to bedirect touched with your hand.

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

Remote controller

DIPswitch 1

Cannot be used. (Do notchange)

Dual remote controllersetting* Refer to 2. DUAL REMOTE

CONTROLLERS in 9SPECIAL INSTALLATIONMETHODS.

Filter reset operation andfilter display

Cannot be used. (Do notchange)

Cannot be used. (Do notchange)

Memory backup setting* Set to ON to use batteries

for the memory backup. Ifbatteries are not used, all ofthe settings stored inmemory will be deleted ifthere is a power failure.

(� Factory setting)

1

2

3

4

5

6

�

�

Follow theselection inFUNCTIONSETTING

�

� Invalidity

Invalidity

�

Validity

SW stateNO.

OFF ONDetail

(4) Press the set temperaturebuttons ( ) ( ) to selectthe setting value.The display flashes as shownto the right during settingvalue selection.

(5) Press the TIMER SET buttonto confirm the setting.Press the TIMER SET buttonfor a few seconds until the set-ting value stops flashing.If the setting value displaychanges or if “- -” is displayed when the flashing stops, the settingvalue 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 temperature buttons ( ) ( ) and fan control buttonsimultaneously again for more than 5 seconds to cancel the functionsetting mode. In addition, the function setting mode will be automati-cally canceled after 1 minute if no operation is performed.

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

Setting value

SU MO TU WE TH FR SA

If “CO” appears in the unit number display, there is a remote controllererror. Refer to the installation instruction sheet included with the remotecontroller.

Error code

1d

1c

Content

Incompatible indoor unit isconnected

Indoor unit ↔ remote controllercommunication error

Unit number

C0

C0

Transmitter section

Test run button

[Using the wireless remote control] (Option)• For the operation method, refer to the operating manual.• The outdoor unit may not operate depending on the room temperature.

In this case, press the test run button on the remote control unit whilethe air conditioner is running. (Point the transmitter section of theremote control unit toward the air conditioner and press the test runbutton with the tip of a ball-point pen, etc.)

• To end test operation, press the remote control unit START/STOP button.(When the air conditioner is run by pressing the test run button, theOPERATION indicator lamp and TIMER indicator lamp will simulta-neously flash slowly.)

[Troubleshooting at the remote control LCD]This is possible only on the wired remote control.

[SELF-DIAGNOSIS]If an error occurs, the following display will be shown.(“EE” will appear in the set room temperature display.)

Unit number

Error code

Ex. Self-diagnosis

SU MO TU WE TH FR SA

Error code Error contents

Indoor signal error

Wired remote controller abnormal

Indoor room temperature sensor error

Indoor heat exchanger temperature sensor (middle)error

Indoor heat exchanger temperature sensor (inlet)error

Float switch operated

Outdoor discharge pipe temperature sensor error

Outdoor heat exchanger temperature sensor (outlet)error

Outdoor temperature sensor error

Compressor temperature sensor error

2-way valve temperature sensor error

3-way valve temperature sensor error

Outdoor heat exchanger temperature sensor (middle)error

Indoor manual auto switch abnormal

Power supply frequency detection error

IPM protection

CT error

Compressor location error

Outdoor fan error

Connected indoor unit abnormal

Outdoor unit computer communication error

Indoor fan abnormal

Discharge temperature error

Exessive high pressure protection on cooling

4-way valve abnormal

Pressure switch abnormal

Compressor temperature error

Active filter abnormal

PFC circuit error

011326270002

04

28

090C

06

0A151d1E

29

202A17181A1b1F1c120F242c162b1925

TROUBLESHOOTING (Option)

[Troubleshooting with the indoor display]

Troubleshooting at the display is possible either on the wired or wirelessremote control.

The OPERATION, TIMER and FILTER lamp operate as follows table ac-cording to the error contents.

FILTER LAMP(RED)

TIMER LAMP(ORANGE)

OPERATION LAMP(GREEN)

MANUAL AUTO

Indoor signal error

Wired remote controller abnormal

Indoor room temperature sensor error

Indoor heat exchanger temperaturesensor (middle) error

Indoor heat exchanger temperaturesensor (inlet) error

Float switch operated

Outdoor discharge pipe temperaturesensor error

Outdoor heat exchanger temperaturesensor (outlet) error

Outdoor temperature sensor error

Compressor temperature sensor error

2-way valve temperature sensor error

3-way valve temperature sensor error

Outdoor heat exchanger temperaturesensor (middle) error

Indoor manual auto switch abnormal

Power supply frequency detection er-ror

IPM protection

CT error

Compressor location error

Outdoor fan error

Connected indoor unit abnormal

Outdoor unit computer communicationerror

Indoor fan abnormal

Discharge temperature error

Exessive high pressure protection oncooling

4-way valve abnormal

Pressure switch abnormal

Compressor temperature error

Active filter abnormal

PFC circuit error

Error contentsOPERATION

lamp

(2 times)

(2 times)

(2 times)

(2 times)

(3 times)

(3 times)

(3 times)

(3 times)

(3 times)

(3 times)

(3 times)

(4 times)

(4 times)

(5 times)

(5 times)

(5 times)

(5 times)

(5 times)

(5 times)

(6 times)

(7 times)

(7 times)

(7 times)

(7 times)

(7 times)

(8 times)

(8 times)

TIMERlamp

(8 times)

(2 times)

(3 times)

(4 times)

(6 times)

(2 times)

(3 times)

(4 times)

(8 times)

(2 times)

(4 times)

(2 times)

(3 times)

(5 times)

(6 times)

(7 times)

(8 times)

(2 or 3 times)

(2 times)

(3 times)

(4 times)

(5 times)

(6 times)

(2 or 3 times)

(4 times)

FILTERlamp

(2 times)

(3 times)

(4 times)

: 0.5s ON/0.5s OFF (Flash) : OFF

B

FF

NOTES

If the function to change the temperature sensor is used as shown inexamples A (other than example B), be sure to lock the detection location.If the function is locked, the lock display will flash when theTHERMO SENSOR button is pressed.

Indoor unit

Jumper wire

JM2

Connect

Connect

Disconnect

Disconnect

Remote control unitsignal code

A (Primary setting)

B

C

D

JM1

Connect

Disconnect

Connect

Disconnect

[When using the wireless remote controller](Option)

SWITCHING REMOTE CONTROL UNIT SIGNALCODES

• Confirm the setting of the remote control unit signal code and the printedcircuit board setting.If these are not confirmed, the remote control unit cannot be used tooperate for the air conditioner.

Indoor unitPrinted circuit board

3. TEST RUNCHECK ITEMS

(1) Is operation of each button on the remote control unit normal?(2) Does each lamp light normally?(3) Do not air flow direction louvers operate normally?(4) Is the drain normal?(5) Is there any abnormal noise and vibration during operation?

• Do not operate the air conditioner in the running state for a long time.

[OPERATION METHOD]• For the operation method, refer to the operating manual.

(1) Stop the air conditioner operation.(2) Press the master control button and the fan control button simul-

taneously for 2 seconds or more to start the test run.

(3) Press the start/stop button to stop the test run.

Test run display

Setting Other Functions

• The following settings are also possible, depending on the operatingconditions. (The unit is factory-set to “00”.)

Auto Restart

Setting Value

00

01

Setting Description

Yes

No

Function Number

40

Indoor Room Temperature Sensor Switching Function (Wired remote con-troller only)

Setting Value

00

01

Setting Description

No

Yes

Function Number

42

• If setting value is “00”, room temperature is controlled by the indoor unittemperature sensor.

• If setting value is “01”, room temperature is controlled by either indoorunit temperature sensor or remote control unit sensor.

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

Setting record• Record any changes to the settings in the following table.

Setting

Outlet directions

Filter sign

Cooler room temperaturecorrectionHeater room temperaturecorrection

Auto restart

Indoor room temperaturesensor switching function

Setting Value

A

SETTING THE ROOM TEMPERATUREDETECTION LOCATION

The detection location of the room temperature can be selected from thefollowing two examples. Choose the detection location that is best for theinstallation 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 displayflashes because the function is locked at the factory.

Indoor unit

FF

B. Indoor unit/remote controller setting (room tem-perature sensor selection)

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

(1) Enable the room temperature sensor selection in FUNCTION SET-TING, which will be described later.

(2) Press the THERMO SENSOR button for 5 seconds or more to selectthe temperature sensor of the indoor unit or the remote controller.

10 CUSTOMER GUIDANCE

Explain the following to the customer in accordance with the operatingmanual:

(1) Starting and stopping method, operation switching, temperature ad-justment, timer, air flow switching, and other remote control unit op-erations.

(2) Air filter removal and cleaning, and how to use the air louvers.(3) Give the operating and installation manuals to the customer.(4) If the signal code is changed, explain to the customer how it changed

(the system returns to signal code A when the batteries in the remotecontrol unit are replaced).

*(4) is applicable to using wireless remote control.

8

G

Lock nutConnection cord(to outdoor unit)

Wired remote controller cordCord clamp

(to outdoor unit)

12

3

5 6

••••• Connect the connection cord to the terminal board.••••• Connect the remote controller cord to the terminal board.••••• Fix the remote controller cord to the control box cover with a nylon clamp.

Setting Value

00

01

02

03

Setting Description

Standard

(2,500 hours)

Long interval

(4,400 hours)

Short interval

(1,250 hours)

No indication

Function Number

11

Setting the Filter Sign• The indoor unit has a sign to inform the user that it is time to clean the

filter.• Select the time setting for the filter sign display interval in the table

below according to the amount of dust or debris in the room. (The unitis factory-set to “00”.)

• If you do not wish the filter sign to be displayed, select the setting valuefor “No indication”.

Setting Value

00

01

Setting Description

4-way

3-way

Function Number

22

Setting the Outlet Directions

• Select the setting values in the table below for using a 3-way or 2-wayoutlet. (The unit is factory-set to “00”.)

Setting the Cooler Room Temperature Correction• Depending on the installed environment, the room temperature sensor

may require a correction. The settings may be selected as shown in thetable below. (The unit is factory-set to “00”.)

Setting Value

00

01

Setting Description

Standard

Lower control

Function Number

30

Setting the Heater Room Temperature Correction• Depending on the installed environment, the room temperature sensor

may require a correction. The settings may be changed as shown in thetable below. (The unit is factory-set to “00”.)

Setting Value

00

01

02

03

Setting Description

Standard

Lower control

Slightly warmer control

Warmer control

Function Number

31

2. FUNCTION SETTING

• This procedure changes to the function settings used to control theindoor unit according to the installation conditions. Incorrect settingscan cause the indoor unit malfunction.

• After the power is turned on, perform the “FUNCTION SETTING”according to the installation conditions using the remote controller.

• The settings may be selected between the following two: FunctionNumber or Setting Value.

• Settings will not be changed if invalid numbers or setting values areselected.

CAUTION

1 Confirm whether the wiring work for outdoor unit hasbeen finished.

2 Confirm whether the cap for electric control box onthe outdoor unit is close.

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 set-

tings, and then turn on the indoor and outdoor units. After “ ” hasflashed on the set temperature display for several seconds, the clockdisplay will appear in the center of the remote controller display.The clock display will appear in the center of the remote controllerdisplay.

SU MO TU WE TH FR SA

7 FUNCTION SETTINGAND TEST RUN

Operation Method

(1) Press the set temperaturebuttons ( ) ( ) and fancontrol button simultaneouslyfor more than 5 seconds toenter the function settingmode.

(2) Press the SET BACK buttonto select the indoor unitnumber.

(3) Press the set time buttons toselect the function number.

Unit number of INDOOR UNIT

Function number

SU MO TU WE TH FR SA

SET BACK

SU MO TU WE TH FR SA

SU MO TU WE TH FR SA

2. 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 slave units.

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

Remote controller cord

Indoor unit

When ground wireis necessary

Remote controller

Slave unitMaster unit

Number of remotecontrollers

Master unit Slave unit

DIP SW 1 No. 2

OFF

OFF

DIP SW 1 No. 2

–

ON

1 (Normal)

2 (Dual)

(2) Remote controller DIP switch 1 settingSet the remote controller DIP switch 1 No. 2 according to the followingtable.

1 2 31 2 3

1 2 3