Toshiba RAV-SP180UT-UL User Manual

AIR CONDITIONER (SPLIT TYPE)

Installation Manual

Indoor Unit

Model name:

4-way Air Discharge Cassette Type

RAV-SP180UT-UL
RAV-SP240UT-UL
RAV-SP300UT-UL
RAV-SP360UT-UL
RAV-SP420UT-UL

Installation Manual
Air conditioner

Manuel du proprietaire
Climatiseur

(Split type) 1

(Type split) 37

English

Français

4-way Air Discharge Cassette Type

Please read this Installation manual carefully before installing the Air Conditioner.

• This Manual describes the installation method of the indoor unit.

• For installation of the outdoor unit, follow the Installation Manual attached to the outdoor unit.

Installation Manual

ADOPTION OF NEW REFRIGERANT

This Air Conditioner uses R410A an environmentally friendly refrigerant.

Contents

1 ACCESSORY PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2 PRECAUTIONS FOR SAFETY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3 SELECTION OF INSTALLATION PLACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5 DRAIN PIPING WORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

6 REFRIGERANT PIPING AND EVACUATING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

7 ELECTRICAL CONNECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

8 APPLICABLE CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

9 TEST RUN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

10 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

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4-way Air Discharge Cassette Type

1 ACCESSORY PARTS

 Accessory parts

Part name Q’ty Shape Usage

Installation Manual 2 These manual (Be sure to hand over to customers)

Heat insulating pipe 2 For heat insulation of pipe connecting section

Installation Manual

Installation pattern 1

Installation gauge – – For positioning of ceiling position

Washer 4 For hanging-down unit

Eccentric washer 4 For hanging-down unit

Hose band 1 For connecting drain pipe

Heat insulator 1 For heat insulation of drain connecting section

Flexible hose 1 For adjusting center of drain pipe

Owner’s Manual 1 (Be sure to hand over to customers)

—

For confirmation of ceiling opening and indoor unit
position

 Separate sold parts

• The Ceiling panel and remote control are sold separately. For the installation of these products, follow the
Installation Manuals supplied with them.

• The wireless type remote control is designed to be installed by attaching a wireless remote controller kit (sold
separately) to the standard panel. (The wireless remote controller kit consists of a wireless remote control and
adjust corner caps with a signal receiving unit.)

–2–

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4-way Air Discharge Cassette Type

Installation Manual

2 PRECAUTIONS FOR SAFETY

Installing, starting up, and servicing air--conditioning equipment can be hazardous due to system pressures,
electrical components, and equipment location (roofs, elevated structures, etc.).

Only trained, qualified installers and service mechanics should install, start--up, and service this equipment.
Untrained personnel can perform basic maintenance functions such as cleaning heat exchanger. All other
operations should be performed by trained service personnel.
When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached
to the equipment.
Follow all safety codes.Wear safety glasses and work gloves. Keep quenching cloth and fire extinguisher nearby
when brazing. Use care in handling, rigging, and setting bulky equipment.
Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the
unit. Consult local building codes and National Electrical Code (NEC) for special requirements. Recognize safety
information. This is the safety--alert symbol . When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.Understand these signal words: DANGER, WARNING, and
CAUTION. These words are used with the safety--alert symbol.
DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING
signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which
may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which
will result in enhanced installation, reliability, or operation.

WARNING

• Ask an authorized dealer or qualified installation professional to install (including moving)/maintain the air
conditioner.

Inappropriate installation may result in water leakage, electric shock or fire.

• Be sure to connect ground wire. (grounding work)
Incomplete grounding cause an electric shock.
Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone wires.

• Turn off the circuit breaker before attempting any electrical work.
Make sure all circuit breaker is off. Failure to do so may cause electric shock.

• Install the refrigerant pipe securely during the installation work before operating the air conditioner.
If the air conditioner is operated with the valve open and without the refrigerant pipe, the compressor sucks air and
the refrigeration cycle is overpressurized, which may cause a burst or injury.

• When moving the air conditioner for the installation into another place, be very careful not to enter any

gaseous matter other than the specified refrigerant into the refrigeration cycle.

If air or any other gas is mixed in the refrigerant, the gas pressure in the refrigeration cycle becomes abnormally high
and it resultingly causes pipe burst and injuries on persons.

• Perform installation work properly according to the Installation Manual.
Inappropriate installation may result in water leakage, electric shock or fire.

• When the air conditioner is installed in a small room, provide appropriate measures to ensure that the

concentration of refrigerant leakage occur in the room does not exceed the critical level.

• Install the air conditioner securely in a location where the base can sustain the weight adequately.

• Perform the specified installation work to guard against an earthquake.
If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.

• If refrigerant gas has leaked during the installation work, ventilate the room immediately.
If the leaked refrigerant gas comes in contact with fire, noxious gas may generate.

• After the installation work, confirm that refrigerant gas does not leak.
If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas might
generate.

• Electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Make

sure the air conditioner uses an exclusive power supply.

An insufficient power supply capacity or inappropriate installation may cause fire.

• Use the specified wires for wiring connect the terminals securely fix.

To prevent external forces applied to the terminals from affecting the terminals.

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4-way Air Discharge Cassette Type

• Conform to the regulations of the local electric company when wiring the power supply.
Inappropriate grounding may cause electric shock.

• For the refrigerant recovery work (collection of refrigerant from the pipe to the compressor), stop the

compressor before disconnecting the refrigerant pipe.

If the refrigerant pipe is disconnected while the compressor is working with the valve open, the compressor sucks air
and the refrigeration cycle is overpressurized, which may cause a burst or injury.

Installation Manual

CAUTION

• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY
OZONE LAYER.

• The characteristics of R410A refrigerant are ; easy to absorb water, oxidizing membrane or oil, and its pressure is
approx. 1.6 times higher than that of refrigerant R22. Accompanied with the new refrigerant, refrigerating oil has also
been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigerating oil does
not enter the refrigerating cycle.

• To prevent charging an incorrect refrigerant and refrigerating oil, the sizes of connecting sections of charging port of
the main unit and installation tools are changed from those for the conventional refrigerant.

• Accordingly the exclusive tools are required for the new refrigerant (R410A).

• For connecting pipes, use new and clean piping designed for R410A, and please care so that water or dust does not
enter.

• Tighten the flare nut with a torque wrench in the specified manner.
Excessive tightening of the flare nut may cause a crack in the flare nut after a long period, which may result in
refrigerant leakage.

• Wear heavy gloves during the installation work to avoid injury.

• The installation fuse must be used for the power supply line of this conditioner.

–4–

EN

4-EN

4-way Air Discharge Cassette Type

Installation Manual

3 SELECTION OF INSTALLATION PLACE

WARNING

• Install the air conditioner at enough strong place to withstand the weight of the unit.
If the strength is not enough, the unit may fall down resulting in injury.

• Install the air conditioner at a height 8’ (2.4 m) or more from the floor.
If you insert your hands or others directly into the unit while the air conditioner operates, it is dangerous because you
may contact with revolving fan or active electricity.

CAUTION

• Do not install the air conditioner in a location subject to a risk of exposure to a combustible gas.
If a combustible gas leaks and stays around the unit, a fire may occur.

Upon approval of the customer, install the air conditioner in a place that satisfies the following
conditions.

• Place where the unit can be installed horizontally.

• Place where a sufficient servicing space can be ensured for safety maintenance and check.

• Place where drained water will not cause any problem.

Avoid installing in the following places.

• Place exposed to air with high salt content (seaside area), or place exposed to large quantities of sulfide gas (hot
spring).
(Should the unit be used in these places, special protective measures are needed.)

• A restaurant kitchen where a lot of oil is used or place near machines in a factory (Oil adhering to the heat
exchanger and resin part (turbo fan) in the indoor unit may reduce the performance, generate mist or dew drop,
or deform or damage resin parts.)

• Place where organic solvent is used nearby.

• Place close to a machine generating high frequency.

• Place where the discharged air blows directly into the window of the neighbor house. (Outdoor unit)

• Place where noise of the outdoor unit is easily transmitted.
(When install the outdoor unit on the boundary with the neighbor, pay due attention to the level of noise.)

• Place with poor ventilation. (Before air ducting work, check whether value of fan speed, static pressure and duct
resistance are correct.)

• Do not use the air conditioner for special purposes such as preserving food, precision instruments, or art objects,
or where breeding animals or growing plants are kept. (This may degrade the quality of preserved materials.)

• Place where any of high-frequency appliances (including inverter devices, private power generators, medical
equipment, and communication equipment) and inverter-type fluorescent light is installed.
(A malfunction of the air conditioner, abnormal control, or problems due to noise to such appliances/equipment
may occur.)

• When the wireless remote control is used in a room equipped with an inverter-type fluorescent light or at a place
exposed to direct sunlight, signals from the remote control may not be received correctly.

• Place near a door or window exposed to humid outside air (Dew droping may form.).

• Place where special spray is used frequently.

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4-way Air Discharge Cassette Type

 Installation space

Secure the specified space in the figure for installation and servicing.

Model RAV- A in (mm)

SP180, SP240 Type 10.7” (271) or more
SP300, SP360, SP420 Type 13.1” (334) or more

7.9” (200)

200 (7.9)

39.4” (1000) or more

1000 (39.4) or more

0.6” (15)

or more

15 (0.6) or more

A

Check port

Check port

450×450

17.7” x 17.7”

(17.7×17.7)

(450 x 450)

1000 (39.4)

Obstacle

Obstacle

or more

39.4” (1000) or more

Check port

Check port

17.7” x 17.7”

450×450

(450 x 450)

(17.7×17.7)

Installation Manual

unit : in (mm)

200 (7.9)

7.9” (200)

Check port must be located on the

Check port must be located on

Fresh air inlet box side, if it is installed.

the Fresh air inlet box side,

 Selection of installation place

In case of continued operation of the indoor unit under high-humidity conditions as described below, dew may
condense and water may drop.

Especially, high-humidity atmosphere (dew point temperature : 73.4°F (23°C) or more) may generate dew inside
the ceiling.

1. Unit is installed inside the ceiling with slated roof.

2. Unit is installed at a location using inside of the ceiling as fresh air take-in path.

3. Kitchen

Advice

• Set a service check opening panel at right side of the unit (size: 17.7" × 17.7" (450 × 450mm) or more) for piping,
maintenance, and servicing.

• If installing a unit at such place, put insulating material (glass wool, etc.) additionally on all the positions of the
indoor unit which come to contact with high-humidity atmosphere.

REQUIREMENT

When the humidity inside the ceiling seems to be higher than 80%, attach a heat insulator to the side (top)
surface of the indoor unit. (Use a heat insulator that is 0.4" (10 mm) or more thick.)

–6–

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4-way Air Discharge Cassette Type

Installation Manual

 Ceiling height

Model RAV- Possible installed ceiling height

SP180, SP240 Type Up to 12’6” (3.8 m)
SP300, SP360, SP420 Type Up to 15’1” (4.6 m)

When the height of the ceiling exceeds the distance of the item Standard/4-way in Table on the next page, the hot
air is difficult to reach the floor.

Therefore, it is necessary to change the setup value of the high ceiling switch or discharge direction.

▼ Height list of ceiling possible to be installed

Unit : ft (m)

Model RAV- SP180 Type SP240 Type SP300, SP360, SP420 Type High ceiling setup

No. of discharge direction 4-way 3-way 2-way 4-way 3-way 2-way 4-way 3-way 2-way Set data

Standard (Factory default)

High ceiling (1)

High ceiling (2)

9’2”

(2.8)
10’6”

(3.2)
11’6”

(3.5)

10’6”
(3.2)

11’6”
(3.5)

12’6”
(3.8)

11’6”

(3.5)

12’6”

(3.8)

—

9’10”

(3.0)

10’10”

(3.3)

11’10”

(3.6)

10’10”

(3.3)
11’6”

(3.5)
12’6”

(3.8)

11’10”

(3.6)
12’6”

(3.8)

—

12’10”

(3.9)
13’9”

(4.2)
14’9”

(4.5)

13’9”
(4.2)

14’5”
(4.4)

15’1”
(4.6)

14’9”

(4.5)

15’1”

(4.6)

— 0003

0000

0001

REQUIREMENT

• When using the air conditioner with 2-way/3-way discharge system, a strong wind blows directly if the ceiling
height is lower than the standard.
Therefore, change the setting switch according to height of the ceiling.

• When using the high ceiling (1) or (2) with 4-way discharge system, the draft is apt to be felt due to drop of the
discharge temperature.

The lighting time of the filter sign (notification of filter cleaning) on the remote control can be changed according to
installation conditions.

When it is difficult to obtain satisfactory heating due to location place of the indoor unit or the structure of the room,
the detection temperature of heating can be raised.
Refer to "8 Applicable Controls"in this manual for the setting procedure.

7-EN

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4-way Air Discharge Cassette Type

Installation Manual

 Discharge direction

As shown in the figure below, air discharge directions can be selected according to the shape of the room and the
location of the indoor unit installation.

3 directions 2 directions

• Use a Air discharge direction kit (sold separately) to change discharge directions.
Discharge directions are limited. Follow the Installation Manual supplied with the Air discharge direction kit.

Air discharge direction kit
(sold separately)

–8–

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4-way Air Discharge Cassette Type

Installation Manual

4 INSTALLATION

REQUIREMENT

Strictly comply with the following rules to prevent damage of the indoor units and human injury.

• Do not put a heavy article on the indoor unit. (Even units are packaged)

• Carry in the indoor unit as it is packaged if possible. If carrying in the indoor unit unpacked by necessity, be sure
to use buffering cloth, etc. to not damage the unit.

• To move the indoor unit, hold the hooking metals (4 positions) only.
Do not apply force to the other parts (refrigerant pipe, drain pan, foamed parts, or resin parts, etc.).

• Carry the package by two or more persons, and do not bundle it with plastic band at positions other than
specified.

 External view Unit : in (mm)

Ceiling bottom surface

Ceiling bottom
surface

2.4" (61)

1.1" (28.5)

Ceiling
bottom
surface

Knockout for
Auxiliary fresh air
flange
For Ø3.9" (100)

7.4" (187)

Z view

Ceiling bottom surface

Ceiling panel (sold separately)

33.1" (840) Unit external dimension

Electric parts box

33.1" (840)

10.6" (269)

2.2" (57)

33.9" - 35.8" (860 - 910) Ceiling opening dimension

2.5" (64)

1.2" (30)

16.1" (408)

16.4" (416.5)

27.2" ± 0.8" (690 ± 20) Hanging bolt pitch

37.4" (950) Panel external dimension

Ceiling
opening
dimension

33.9" - 35.8" (860 - 910)

12.7" (323)

5.2"

(132)

Refrigerant
pipe
connecting
port (Liquid) B

Refrigerant
pipe
connecting
port (Gas) C

2.8" (72)

1.6" (40)

10.4" (263)

4.1" (105)

30.7" (780) Hanging bolt pitch

9.5" (241.5)

Drain pipe
connecting

37.4" (950) Panel external dimension

port

Hanging bolt 3/8" (M10)
(To be procured locally)

6.8" (172)

7.4" (189)

4.4" (112)

2.3" (58)

1.7" (42)

Hole for power
supply cable

Conduit hole
(knockout)

Hole for remote
control wires

11.1" (281)

9.9" (251)

Ceiling bottom
surface

12.1" (306)

9-EN

Unit : in (mm)

Model RAV A B C Model RAV A B C

SP180 Type 10.1” (256) Ø1/4” (6.4) Ø1/2” (12.7) SP360 Type 12.6” (319) Ø3/8” (9.5) Ø5/8” (15.9)

SP240 Type 10.1” (256) Ø3/8” (9.5) Ø5/8” (15.9) SP420 Type 12.6” (319) Ø3/8” (9.5) Ø5/8” (15.9)

SP300 Type 12.6” (319) Ø3/8” (9.5) Ø5/8” (15.9)

–9–

4-way Air Discharge Cassette Type

Installation Manual

 Opening a ceiling and

installation of hanging bolts

• Consider the piping/wiring after the unit is hung when
determining the location of the indoor unit installation
and orientation.

• After the location of the indoor unit installation has
been determined, open the ceiling and install
hanging bolts.

• The dimensions of the ceiling opening and hanging
bolt pitches are given in the outline drawing and the
attached installation pattern.

• When a ceiling already exists, lay the drain pipe,
refrigerant pipe, system interconnection wires, and
remote control wires to their connection locations
before hanging the indoor unit.

Procure hanging bolts and nuts for installing the indoor
unit (these are not supplied).

Hanging bolt 3/8" (M10) 4 pieces

Nut 3/8" (M10) 12 pieces

Using the installation pattern (accessory)

The installation pattern is provided inside the
packaging cap.

<For existing ceiling>

Use the installation pattern positioning a ceiling
opening and hanging bolts.

<For new ceiling>

Use the installation pattern to position the ceiling
opening when hanging a ceiling.

• After the hanging bolts have been installed, install
the indoor unit.

• Hook the four holes in the installation pattern to the
panel fixing screws of the indoor unit.

• When hanging a ceiling, open the ceiling along the
outside dimensions of the installation pattern.

Treatment of ceiling

The ceiling differs according to structure of building.
For details, consult your constructor or interior finish
contractor.

In the process after the ceiling board has been
removed, it is important to reinforce ceiling foundation
(frame) and to keep horizontal level of installed ceiling
correctly in order to prevent vibration of ceiling board.

(1) Cut and remove the ceiling foundation.
(2) Reinforce the cut surface of ceiling foundation, and

add ceiling foundation for fixing the end of ceiling
board.

Installation of hanging bolt

Use 3/8” (M10) hanging bolts (4 pcs, to be local
procure). Matching to the existing structure, set pitch
according to size in the unit external view as shown
below.

New concrete slab

Install the bolts with insert brackets or anchor bolts.

Rubber

(Blade type

bracket)

Use existing angles or install new support angles.

Use a hole-in anchors, hole-in plugs, or a hole-in bolts.

(Slide type

bracket)

Steel flame structure

Hanging bolt

Hanging bolt

Existing concrete slab

Anchor bolt

(Pipe hanging

anchor bolt)

Support angle

Panel fixing
screw

hole

Indoor unit

Installation pattern (Accessory)

Installation of ceiling opening and hanging
bolt

Hanging bolt

Level

Hanging bracket

–10–

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4-way Air Discharge Cassette Type

• Attach a nut (3/8" (M10): not supplied) and the Ø1.3"
(34 mm) washer (supplied) to each hanging bolt.

• Insert a washer on both sides of the T groove of the
hanging bracket of the indoor unit, and hang the
indoor unit.

• Check that the four sides of the indoor unit are level
using a level vial (levelness: 0.2" (5 mm) or less).

• Detach the installation gauge (accessory) from the
installation pattern.

• Using the installation gauge, check and adjust the
positional relation between the indoor unit and the
ceiling opening (1) (0.4” - 1.4” (10 - 35 mm): 4 sides)
and the hanging-up height (2) (0.5” - 0.7” (12 - 17
mm): 4 corners).
(How to use the installation gauge is printed on the
gauge.)

* Procure hanging bolts

and nuts locally.

Hanging bolt
3/8” (M10)

Nut
3/8” (M10)

Eccentric washer
(Accessory)

* Install with the marking

“UP” facing up.

Washer (Accessory)
To prevent the bolt

from falling off (for
safety), be sure to set
it just under the
hanging bracket as
shown in the figure.

Installation Manual

Indoor unit

(1) 0.4” - 1.4”
(10 - 35 mm)

Ceiling board

(2) 0.5” - 0.7”
(12 - 17 mm)

Installation gauge

REQUIREMENT

Before installation of the indoor unit, be sure to remove
the cushion for transportation between the fan and the
bell mouth. Running the unit without removing the
cushion may damage the fan motor.

Remove the 5 screws and detach the
wire guard. Remove the cushion
placed between fan and bell mouth.
Attach back the wire guard.

Screw

Wire guard

Nut
3/8” (M10)

Level vial (levelness: 0.2” (5 mm) or less)

Indoor unit

Installation gauge

Hanging bolt

Hanging
bracket

(1) 0.4” - 1.4”
(10 - 35 mm)

(2) 0.5” - 0.7”

(12 - 17mm)

Ceiling
board

Screw

Clamp
* Do not remove the

clamp fixing screw on
the indoor unit.

Screw

Cushion

11-EN

–11–

4-way Air Discharge Cassette Type

 Installation of ceiling panel

Installation Manual

(Sold separately)

Install the ceiling panel according to Installation
Manual attached with it after piping/wiring work has
completed.

Check that installation of indoor unit and ceiling
opening part is correct, and then install it.

REQUIREMENT

• Joint the connecting sections of ceiling panel,
ceiling surface, ceiling panel and indoor unit closely.
Any gap between them will cause air leakage and
the generate condensation or water leakage.

• Remove the adjust corner caps at the four corners
of the ceiling panel, and then install the ceiling panel
onto the indoor unit.

• Make sure that the claws of the four adjust corner
caps are securely fit.

* Improper fitting of the claws may cause water

leakage.

 Installation of remote control

W

it

h

in

2

3

’

(7

m

)

(Sold separately)

For installation of the wired remote control, follow the
Installation Manual attached with the remote control.

• Pull out the remote control cord together with the
refrigerant pipe or drain pipe.
Be sure to pass the remote control cord through
upper side of the refrigerant pipe and drain pipe.

• Do not leave the remote control at a place exposed
to the direct sunlight and near a stove.

 Wireless remote control

The sensor of indoor unit with wireless remote control
can receive a signal by distance within approx. 23’ (7
m). Based upon it, determine a place where the remote
control is operated and the installation place.

• Operate the remote control, confirm that the indoor
unit receives a signal surely, and then install it.

• Keep 3’3” (1 m) or more from the devices such as
television, stereo, etc.
(Disturbance of image or noise may generate.)

• To prevent a malfunction, select a place where is not
influenced by a fluorescent light or direct sunlight.

• Two or more (Up to 6 units) indoor units with wireless
type remote control can be installed in the same
room.

EN

–12–

12-EN

4-way Air Discharge Cassette Type

5 DRAIN PIPING WORK

Installation Manual

CAUTION

• Following the Installation Manual, perform the
drain piping work so that water is properly
drained, and apply a heat insulation so as not to
cause a dew droping.
Inappropriate piping work may result in water
leakage in the room and wet of furniture.



Piping/Heat insulating material

Require the following materials for piping and heat
insulating at site.

Piping

Heat insulator

Hard vinyl chloride pipe VP25
(Outer dia. : Ø1.3" (32 mm))

Foam polyethylene :
Thickness 0.4" (10 mm) or more

 Flexible hose

Use the attached flexible hose to adjust center
discrepancy of the hard vinyl chloride pipe or to adjust
the angle.

• Do not use the flexible hose as stretched, or do not
deform it more extent than that in the following figure.

• Be sure to fix the soft end of the flexible hose with the
attached hose band.

• Use the flexible hose on a horizontal level.

OK NO GOOD

• For length of the traversing drain pipe, restrict to
65’7” (20 m) or less.
In case of a long pipe, provide support brackets with
interval of 4’11” - 6’7” (1.5 - 2 m) in order to prevent
waving.

Arched
shape

NO

GOOD

Trap

• Set the collective piping as shown in the below
figure.

As long as possible (3.9” (100 mm))

VP25

VP30 or more

VP25 VP25

Downward slope
1/100 or more

• Be sure not to apply force to the connecting part of
the drain pipe.

• The hard vinyl-chloride pipe cannot be directly
connected to the drain pipe connecting port of the
indoor unit.
For connection with the drain pipe connecting port,
be sure to use/fix the attached flexible hose with the
hose band, otherwise a damage or water leak is
caused on the drain pipe connecting port.

Drain pipe
connecting port
(Hard socket)

Attached hose
band

Attached flexible hose

VP25 vinyl chloride pipe
(To be local procure)

13-EN

max

45°

max

45°

Riser (Trap)

90° Bend

REQUIREMENT

• Be sure to perform heat insulation of the drain pipes
of the indoor unit.

• Never forget to perform heat insulation of the connecting
part with the indoor unit.
An incomplete heat insulation causes dew droping.

• Set the drain pipe with downward slope (1/100 or
more), and do not make swelling or trap on the
piping. It may cause an abnormal sound.

4’11” - 6’7” (1.5 - 2 m)

Heat insulator

1/100 or more
downward

Support
bracket

–13–

Indoor unit

Soft socket

Hard socket

Adhesive inhibited :

Use the attached flexible hose and hose band for
connecting the drain hose to the clear drain socket.
If applying the adhesive, socket will be damaged and
cause water leakage.

Align the attached hose band to
the end of hose, set the

Drain pipe
connecting port
(Transparent)

Indoor unit

tightening position upward, and
then tighten it.

Flexible hose
(Accessory)

Socket for VP25 vinyl chloride pipe
(To be local procure)

Socket for VP25
(To be local procure)

VP25 vinyl chloride
pipe (To be local
procure)

4-way Air Discharge Cassette Type

Installation Manual

 Connecting drain pipe

• Connect a hard socket (procured locally) to the hard
socket of the attached supplied flexible hose.

• Connect a drain pipe (procured locally) to the
connected hard socket.

REQUIREMENT

• Connect hard vinyl chloride pipes securely using an
adhesive for vinyl chloride to avoid water leakage.

• It takes some time until the adhesive is dried and
hardened (refer to the manual of the adhesive). Do
not apply stress to the joint with the drain pipe
during this time period.

 Drain up

When a down-gradient cannot be secured for the
drainpipe, drain-up piping is possible.

• The height of the drain pipe must be 33.5" (850 mm)
or less from the bottom of the ceiling.

• Take the drain pipe out of the drain pipe joint with the
indoor unit in 11.8" (300 mm) or less, and bend up
the pipe vertically.

• Immediately after the pipe is bent up vertically, lay
the pipe making a down-gradient.

• Set downward grading immediately after raising up
vertically.

Pour water gradually so that water does not spread on
the motor of the drain pump.

CAUTION

Pour water gently so that it does not spread around
inside the indoor unit, which may cause a malfunction.

Heat
exchanger

Float switch
connector (3P)
(CN34: red)

Tool for
pouring
water

Drain pan

Insert the hose end between the
heat exchanger and the drain pan,
and then bend the hose downward.

Rising up 26.0”

(661 mm) or less

11.8” (300 mm)
or less

Rising up 33.5” (850 mm) or less

Indoor unit

Underside of ceiling

 Check the draining

In the test run, check that water drain is properly
performed and water does not leak from the connecting
part of the pipes.

Be sure to check draining also when installed in
heating period.
Using a pitcher or hose, pour water (0.4 - 0.5 gal (1500

- 2000 cc)) into the discharge port before installation of

the ceiling panel.

Bottle

Water (0.4 - 0.5 gal (1500 - 2000 cc))

• After the electric work has finished, pour water
during COOL mode operation.

• If the electric work has not yet finished, pull out the
float switch connector (CN34 : Red) from the electric
parts box, and check draining by plugging the single
phase 208/230 V power to the terminal blocks L
L

2.

1 and

If doing so, the drain pump motor operates.

• Test water drain while checking the operation sound
of the drain pump motor.
(If the operation sound changes from continuous
sound to intermittent sound, water is normally
drained.)
After the check, the drain pump motor runs,
connecting the float switch connector.
(In case of check by pulling out the float switch
connector, be sure to return the connector to the
original position.)

EN

–14–

14-EN

4-way Air Discharge Cassette Type

Single phase
208/230 V

White

Red

CN34
(RED)

Power
terminals

Black

Pull out connector CN34 (Red)
from P.C. board.

Black

L1 L2

 Perform heat insulating

• As shown in the figure, cover the flexible hose and
hose band with the attached heat insulator up to the
bottom of the indoor unit without gap.

• Cover the drain pipe seamlessly with a heat insulator
to be procured locally so that it overlaps with the
attached heat insulator of the drain connecting
section.

Installation Manual

Wrap the attached heat insulator seamlessly from
the surface of the indoor unit.

Indoor unit

Heat insulator of the
drain connecting
section (Accessory)

Heat insulator
(procured locally)

* Direct the slits and seams of the heat insulator

upward to avoid water leakage.

15-EN

–15–

4-way Air Discharge Cassette Type

Installation Manual

6 REFRIGERANT PIPING AND EVACUATING

 Refrigerant Piping

1. If the outdoor units are to be mounted on a wall,

make sure that the supporting platform is sufficiently
strong. The platform should be designed and
manufactured to maintain its strength over a long
period of time, and sufficient consideration should
be given to ensuring that the outdoor unit will not fall.

2.

Use copper pipe with 0.03" (0.8 mm) or more
thickness.

0.04" (1.0 mm) or more.)

3. Flare nut and flare works are also different from

those of the conventional refrigerant.
Take out the flare nut attached to the main unit of the
air conditioner, and use it.

REQUIREMENT

When the refrigerant pipe is long, provide support
brackets at intervals of 8’2” - 9’10” (2.5 - 3 m) to clamp
the refrigerant pipe. Otherwise, abnormal sound may
be generated.

(In case pipe size is Ø5/8" (15.9 mm), with

CAUTION

Flaring

• Cut the pipe with a pipe cutter.
Remove burrs completely.
Remaining burrs may cause gas leakage.

• Insert a flare nut into the pipe, and flare the pipe.
As the flaring sizes of R410A differ from those of
refrigerant R22, the flare tools newly manufactured
for R410A are recommended.

However, the conventional
tools can be used by adjusting
projection margin of the
copper pipe.

▼ Projection margin in

flaring : B (Unit : in (mm))

Rigid (Clutch type)

Outer dia. of copper

pipe

1/4” (6.4), 3/8” (9.5)

1/2” (12.7), 5/8” (15.9)

R410A tool

used

R410A R410A

0 - 0.02”

(0 - 0.5)

Conventional

tool used

0.06” - 0.08”
(1.5 - 2.0)

0.08” - 0.1”
(2.0 - 2.5)

B

IMPORTANT 4 POINTS FOR PIPING WORK

1. Remove dust and moisture from the inside of the
connecting pipes.

2. Tight connection (between pipes and unit)

3. Evacuate the air in the connecting pipes using
VACUUM PUMP.

4. Check the gas leakage. (Connected points)

 Pipe size

Model
name

Pipe size

RAV-

Gas side

Liquid side

SP180

type

1/2"

(12.7 mm)

1/4"

(6.4 mm)

SP240, SP300,
SP360, SP420
type

5/8"

(15.9 mm)

3/8"

(9.5 mm)

 Permissible Piping Length

and Height Difference

They vary according to the outdoor unit.
For details, refer to the Installation Manual attached to

the outdoor unit.

▼ Flaring dia. meter size : A (Unit : in (mm))

+0

A

Outer dia. of copper

pipe

1/4” (6.4) 0.36” (9.1)

3/8” (9.5) 0.52” (13.2)
1/2” (12.7) 0.65” (16.6)
5/8” (15.9) 0.78” (19.7)

* In case of flaring for R410A with the

conventional flare tool, pull it out approx.

0.02" (0.5 mm) more than that for R22 to
adjust to the specified flare size.
The copper pipe gauge is useful for
adjusting projection margin size.

-0,02"(–0,4)

R410A

Tightening connection

CAUTION

• Do not apply excessive torque. Otherwise, the nut
may crack depending on the conditions.

A

EN

–16–

16-EN

4-way Air Discharge Cassette Type

Installation Manual

Unit : ft•lbs (N•m)

Outer dia. of copper pipe Tightening torque

1/4" (6.4 mm) 10 - 13 (14 - 18)

3/8" (9.5 mm) 24 - 31 (33 - 42)
1/2" (12.7 mm) 37 - 46 (50 - 62)
5/8" (15.9 mm) 46 - 57 (63 - 77)

▼

Tightening torque of flare pipe connections

Pressure of R410A is higher than that of R22.
(Approx. 1.6 times)

Therefore, using a torque
wrench, tighten the flare pipe

Flare at
indoor
unit side

connecting sections which
connect the indoor and
outdoor units of the specified
tightening torque.

Incorrect connections may
cause not only a gas leak, but
also a trouble of the

Flare at
outdoor
unit side

refrigeration cycle.
Align the centers of the connecting pipes and tighten
the flare nut as far as possible with your fingers. Then
tighten the nut with a spanner and torque wrench as
shown in the figure.

REQUIREMENT

For the tools such as charge hose, etc., use those
manufactured exclusively for R410A.

Refrigerant amount to be added

For addition of the refrigerant, add refrigerant “R410A”
referring to the attached Installation Manual of outdoor
unit.

Be sure to use a scale to charge the refrigerant of
specified amount.

REQUIREMENT

• Charging an excessive or too little amount of
refrigerant causes a trouble of the compressor.
Be sure to charge the refrigerant of specified
amount.

• A personnel who charged the refrigerant should
write down the pipe length and the added
refrigerant amount in the nameplate attached to the
service panel of the outdoor unit. It is necessary to
troubleshoot the compressor and refrigeration cycle
malfunction.

Half union Flare nut

Externally
threaded side

Use a wrench to secure. Use a torque wrench to tighten.

Internally
threaded side

REQUIREMENT

Tightening with an excessive torque may crack the nut
depending on installation conditions.
Tighten the nut within the specified tightening torque.

Piping with outdoor unit

• Shape of valve differs according to the outdoor unit.
For details of installation, refer to the Installation
Manual of the outdoor unit.

 Evacuation

Using a vacuum pump, perform vacuuming from the
charge port of valve of the outdoor unit.

For details, follow to the Installation Manual attached to
the outdoor unit.

• Never use the refrigerant sealed in the outdoor unit
for air purge.

Open the valve fully

Open the valve of the outdoor unit fully. A 4 mm
hexagonal wrench is required for opening the valve.
For details, refer to the Installation Manual attached to
the outdoor unit.

Gas leak check

Check with a leak detector or soap water whether gas
leaks or not, from the pipe connecting section or cap of
the valve.

REQUIREMENT

Use a leak detector manufactured exclusively for HFC
refrigerant (R410A, R134a, etc.).

Thermal insulation process

Apply thermal insulation for the pipes separately at
liquid side and gas side.

For the thermal insulation to the pipes at gas side, be
sure to use the material with heat-resisting
temperature 248 °F (120 °C) or higher.

Using the attached thermal insulation material, apply
the thermal insulation to the pipe connecting section of
the indoor unit securely without gap.

17-EN

REQUIREMENT

• Apply the thermal insulation to the pipe connecting
section of the indoor unit securely up to the root

–17–

4-way Air Discharge Cassette Type

without exposure of the pipe. (The pipe exposed to
the outside causes water leak.)

• Wrap heat insulator with its slits facing up (ceiling
side).

Wrap the pipe with the attached heat insulator
without any gap between the indoor unit.

Indoor unit

The seam must be faced upward
(ceiling side).

Installation Manual

Heat insulation
pipe
(Accessory)

Union

Flare nut

Heat insulator
of the pipe

–18–

EN

18-EN

4-way Air Discharge Cassette Type

7 ELECTRICAL CONNECTION

Installation Manual

WARNING

1. Using the specified wires, ensure to connect the
wires, and fix wires securely so that the external
tension to the wires do not affect the connecting
part of the terminals.

Incomplete connection or fixation may cause a fire,
etc.

2. Be sure to connect ground wire. (grounding work)

Incomplete grounding cause an electric shock.
Do not connect ground wires to gas pipes, water
pipes, lightning rods or ground wires for telephone
wires.

3. Appliance shall be installed in accordance with
national wiring regulations.

Capacity shortage of circuit breaker or incomplete
installation may cause an electric shock or a fire.

CAUTION

• Consult local building codes, NEC (National Electrical

Code) or CEC (Canadian Electrical Code) for special
requirements.

• This indoor unit has no power cord.

• If incorrect/incomplete wiring is carried out, it will

cause an electrical fire or smoke.

• Be sure to install circuit breaker is not tripped by shock

waves.
If circuit breaker is not installed, an electric shock may
be caused.

• Be sure to use the cord clamps attached to the

product.

• Do not damage or scratch the conductive core and

inner insulator of power and system interconnection
wires when peeling them.

• Use the power cord and system interconnection wire

of specified thickness, type, and protective devices
required.

REQUIREMENT

• For power supply wiring, strictly conform to the
Local Regulation in each country.

• For wiring of power supply of the outdoor units,
follow the Installation Manual of each outdoor unit.

• Never connect 208/230 V power to the terminal
blocks (A, B etc.) for control wiring.
(Otherwise, the system will fail.)

• Perform the electric wiring so that it does not come
to contact with the high-temperature part of the
pipe.
The coating may melt resulting in an accident.

• Run the refrigerant piping line and control wiring line
in the same line.

• Do not turn on the circuit breaker of the indoor unit
until vacuuming of the refrigerant pipes completes.

Remote control wiring

• For single system, use 2 x AWG20 non polarity wire
is used for the remote control wiring.

Wiring

1. Connect the connecting wire to the terminal as

identified with their respective numbers on the
terminal block of indoor and outdoor unit.
(4

x AWG12)

2. Insulate the unsheathed redundant cords

(conductors) with electrical insulation tape.
Process them so that they do not touch any electrical
or metal parts.

3. For inter-unit wiring, do not use a wire jointed to

another on the way.

Wire Quantity x size

1

Indoor unit - Outdoor unit *
Ground 1 x AWG12 or thicker
Remote control 2 x AWG20 (non-polar)

*1 :Length of the system interconnection wires.

RAV- SP180AT2 SP240AT2

Wire

length

164’1” (50

m) or less

3 x AWG12 (polar)

SP300AT2 -

SP420AT2

229’8” (70

m) or less

246’1” (75 m) or

less

CAUTION

Use the same size wire for the field power supply wire
and system interconnection wires when the outdoor unit
is RAV-SP180AT2.

NOTE

• Use copper supply wires.

• Use UL wires rated 600 V for the system
interconnection wires.

• Use UL wires rated 300 V for the remote control
wires.

19-EN

–19–

4-way Air Discharge Cassette Type

Installation Manual

 Wire connection

REQUIREMENT

• Be sure to connect the wires matching the terminal numbers. Incorrect connection causes a trouble.

• The low-voltage circuit is provided for the remote control. (Do not connect the high-voltage circuit)

• Remove the cover of the electric parts box by taking off the mounting screws (2 positions) and pushing the
hooking section. (The cover of the electric parts box remains hanged to the hinge.)

• Remove the 2 screws from the wire cover.

• Attach the conduit pipe to the conduit plate with a lock nut.

• Connect the system interconnection wires and remote control wire to the terminal block of the electric parts box.
Secure the ground wire with the ground screw.

• Tighten the screws of the terminal block, and fix the wires with cord clamp attached to the electric parts box.
(Do not apply tension to the connecting section of the terminal block.)

• Mount the wire cover without catching the wires. (The wire cover should be mounted before the ceiling panel.)

• Mount the cover of the electric parts box without catching the wires.
(Mount the cover after wiring on the ceiling panel.)

▼ Thermal insulation to wiring connecting port

Hole for remote
control wires

Conduit pipe

Conduit plate

Side D
(Space: 0.33” (8.5 mm))

Piping
Knockout

Lock nut

Conduit
connection hole

Insert the wire to Side C.

Hinge

Electric parts
box cover

Side C
(Space: 0.16” (4 mm))

Screws at 2 positions

Wire cover

Ground screw

Power supply
terminal block

L1 L2 S

Cord clamp

Louver connector
(CN510: White)

Remote
control
terminal block

A

B

EN

–20–

20-EN

4-way Air Discharge Cassette Type

Installation Manual

 System interconnection wires

and ground wire

1. Strip the wire ends.

System interconnection wire : 0.4” (10 mm)
Ground wire : 0.8” (20 mm)

2. Match the wire colors with the terminal numbers on

the indoor and outdoor units’ terminal blocks and
firmly screw the wires to the corresponding
terminals.

3. Secure the ground wire with the ground screw.

4. Fix the wires with a cord clamp.

Unit: in (mm)

0.8” (20)

L

1SL2

1.2” (30)

0.4” (10)

 Wiring on the ceiling panel

According to the Installation Manual of the ceiling
panel, connect the connector (20P: White) of the
ceiling panel to the connector (CN510: White) on P.C.
board of the electric parts box.

 Remote Control Wiring

• Strip off the wire approx. 0.4” (9 mm) to connect.

• For a single system, use non polarity, 2 core wire for
the remote control wiring. (2 x AWG 20)

Terminal block for
remote control wiring
of indoor unit

A
B

Remote control wire
(Field procurement)

• For the details of wiring/installation of the remote
control, refer to the Installation Manual enclosed with
the remote control.

Terminal block

Remote

A

control

B

unit

Ground wire

CAUTION

• Firmly tighten the screws of the terminal block.

Keep the wire length as shown in figure below when it
is connected to the terminal block.

0.08” (2 mm) or less

System
interconnection wire

 Wiring diagram

▼ Single system

Indoor unit

Low voltage

A B

Remote
control

Outdoor
unit

208/230-1-60

L

1

L

2

S

High voltage

L

1

L

2

S

21-EN

–21–

4-way Air Discharge Cassette Type

8 APPLICABLE CONTROLS

Installation Manual

REQUIREMENT

• When you use this air conditioner for the first time,
it takes approx. 5 minutes until the remote control
becomes available after power-on. This is normal.

<When power is turned on for the first time after
installation>

It takes approx. 5 minutes until the remote control
becomes available.

Approx. 5 minutes

Power
on

<When power is turned on for the second (or
later) time>

It takes approx. 1 minute until the remote control
becomes available.

Power
on

• Normal settings were made as factory default.
Change the indoor unit settings as required.

• Use the wired remote control to change the
settings.

* The settings cannot be changed using the

“SETTING”
flashes

“SETTING”
flashes

wireless remote control, sub remote control,
or remote-controlless system (for central
remote control only). Therefore, install the
wired remote control to change the settings.

“SETTING”
goes out

Approx. 1 minutes

“SETTING”
goes out

Remote
control is
available

Remote
control is
available

 Changing applicable control

setting

Basic procedure for changing settings

Change the settings while the air conditioner is not
working.
(Be sure to stop the air conditioner before making
settings.)

1
3

4

6

5

1

Procedure 1

Push button and temp. setup button
simultaneously for at least 4 seconds.

After a while, the display flashes as shown in the figure.
Confirm that the CODE No. is [01].

• If the CODE No. is not [01], push button to erase
the display content, and repeat the procedure from
the beginning.
(No operation of the remote control is accepted for a
while after button is pushed.)

2

(* Display content varies with

the indoor unit model.)

Procedure 2

Each time you push button, indoor unit
numbers in the control group change cyclically. Select
the indoor unit you want to change settings for.
The fan of the selected unit runs and the louvers start
swinging. You can confirm the indoor unit for which you
want to change settings.

–22–

EN

22-EN

4-way Air Discharge Cassette Type

Installation Manual

Procedure 3

Using temp. setup / buttons, specify CODE
No. [ ].

Procedure 4

Using timer time / buttons, select SET DATA
[ ].

Procedure 5

Push button. When the display changes from
flashing to lit, the setup is completed.

• To change settings of another indoor unit, repeat
from Procedure

• To change other settings of the selected indoor unit,
repeat from Procedure
Use button to clear the settings.
To make settings after button was pushed, repeat
from Procedure

2.

3.

2.

Procedure 6

When settings have been completed, push button
to determine the settings.
When button is pushed, “SETTING” flashes and
then the display content disappears and the air
conditioner enters the normal stop mode.

(While “SETTING” is flashing, no operation of the
remote control is accepted.)

 Using wireless remote control

Change the high-ceiling settings with the DIP switch on
the receiver section P.C. board.
For details, refer to the manual of the wireless remote
controller kit. The settings can also be changed with
the switch on the indoor microcomputer P.C. board.
* However, once the setting is changed, setting to

0001 or 0003 is possible but setting to 0000 requires
a setting data change to 0000 using the wired remote
control (sold separately) with the normal switch
setting (factory default).

SW501-1

SW501-2

MCU(IC501)

Setup data SW501-1 SW501-2

0000

(Factory default)

0001 ON OFF
0003 OFF ON

OFF OFF

 Installing indoor unit on high

ceiling

When an indoor unit is installed on a ceiling higher than
the standard height, make the high-ceiling setting for
fan speed adjustment.
Follow to the basic operation procedure

(

1 → 2 → 3 → 4 → 5 → 6 ).

• For the CODE No. in Procedure

• Select the setting data for Procedure
“Height list of ceiling possible to be installed” table on
page 7 in this manual.

3, specify [5d].

4 from the

Restore the factory default

To return the DIP switch settings to the factory default,
set SW501-1 and SW501-2 to OFF, connect a
separately sold wired remote control, and then set the
data of CODE No. [5d] to “0000”.

23-EN

–23–

4-way Air Discharge Cassette Type

Installation Manual

 Filter sign setting

According to the installation condition, the lighting time
of the filter sign (Notification of filter cleaning) can be
changed.

Follow to the basic operation procedure
(

1 → 2 → 3 → 4 → 5 → 6 ).

• For the CODE No. in Procedure

• For the [Set data] in Procedure

3, specify [01].

4, select the setup

data of filter sign lighting time from the following
table.

Setup data Filter sign lighting time

0000 None
0001 150 H
0002 2500 H (Factory default)
0003 5000 H
0004 10000 H

 To secure better effect of

heating

When it is difficult to obtain satisfactory heating due to
installation place of the indoor unit or structure of the
room, the detection temperature of heating can be
raised. Also use a circulator, etc. to circulate heat air
near the ceiling.

Follow to the basic operation procedure
(

1 → 2 → 3 → 4 → 5 → 6 ).

• For the CODE No. in Procedure

• For the set data in Procedure
data of shift value of detection temperature to be set
up from the table below.

Setup

data
0000 No shift
0001 +1.8 °F (+1 °C)

0002

0003 +5.4 °F (+3 °C)
0004 +7.2 °F (+4 °C)
0005 +9.0 °F (+5 °C)
0006 +10.8 °F (+6 °C)

Detection temp shift value

+3.6 °F (+2 °C)

(Factory default)

3, specify [06].

4, select the setup

 Horizontal louver direction

1. Push and TEMP. buttons for at least four
seconds when the air conditioner is not working.

flashes.

Indicates CODE No. “01.”

2. Select an indoor unit to be set by pushing
button (left side of the button).
Indoor unit number changes each time you push the
button.

UNIT No.

1-1

The fan of the selected unit runs and the louvers
start swinging.

3. Change the CODE No. to “45” with TEMP.
buttons.

4. Select louver direction setting with TIME
buttons.

Louver

direction

setting code

0000

0002

5. Push button to check the setting.
The display state changes from flashing to lighting,
and the setting is fixed.

6. Push button to end the setting.

* When the cold draft position is selected, ceiling

contamination is less reduced.

UNIT No.

1-2

Not
display

Louver direction setting

Smudge reducing position

(Air direction to reduce ceiling

contamination) [Factory default]

(Air direction to control cold air fall)

UNIT No.

Cold draft position

1-4

UNIT No.

1-3

–24–

EN

24-EN

4-way Air Discharge Cassette Type

Installation Manual

 Swing mode

1. Push for at least four seconds when the air
conditioner is not working.

flashes.

Indicates CODE No. “F0.”

2. Select an indoor unit to be set by pushing
(left side of the button).
Each time you push the button, unit numbers
change as follows:

UNIT No.

1-1

Not
display

The fan of the selected unit runs and the louvers
start swinging.

3. Select a swing mode by pushing TIME
buttons.

UNIT No.

1-2

UNIT No.

1-4

UNIT No.

1-3

03

Refrigerant
pipe

04 02

Drain
pipe

01

4. Push button.

5. Push button to complete the setting.

Swing setup code Swing of louvers

Swing setup code

0001

0002 Dual swing
0003 Cycle swing

Standard swing

(Factory default)

CAUTION

Do not set the swing setup code to “0000”.
(This setting may cause a failure of the louvers.)

• About “Dual swing”

“Dual” means that louvers 01 and 03 are directed
and swing in one direction and louvers 02 and 04 are
directed and swing in the opposite direction.
(When louvers 01 and 03 are directed downward,
louvers 02 and 04 are directed upward.)

• About “Cycle swing”

The four louvers swing independently at respective
timings.

25-EN

–25–

4-way Air Discharge Cassette Type

Installation Manual

 Louver lock (No swing)

1. Push (right side of the button) for at least
four seconds when the air conditioner is not working.

flashes.

Indicates CODE No. “F1.”

2. Select an indoor unit to be set by pushing
(left side of the button).
Each time you push the button, unit numbers
change as follows:
The fan of the selected unit runs and the louvers
start swinging.

UNIT No.

1-1

3. Select a louver you want to lock by pushing TEMP.

buttons.

4. Select the louver direction you do not want to swing
by pushing TIME buttons.

Setting data

(1)

0001

UNIT No.

1-2

UNIT No.

1-4

0002

(2)

UNIT No.

1-3

(3)

0003

 Cancel louver lock

Set the louver direction to “0000” of the louver lock
setup procedure above.

Setting data

0000

• When the setting is canceled, goes out.

Other operations are the same as those in
“Louver lock (No swing)”.

 Power saving mode

1. Push button for at least four seconds when
the air conditioner is not working.

flashes.

Indicates CODE No. “C2.”

2. Select an indoor unit to be set by pushing
(left side of the button).
Each time you push the button, unit numbers
change as follows:

UNIT No.

1-1

UNIT No.

1-2

UNIT No.

1-3

(4)

0004

(5)

0005

* When (4) or (5) is selected, dew drop may occur

during cooling mode.

5. Determine the setting by pushing button.
When the setting has been determined, lights
up.

6. Push button to complete the setting.

0001-0005
(Louver lock position code)

UNIT No.

1-4

The fan of the selected unit runs and the louvers
start swinging.

3. Adjust the power save setting by pushing TIME
buttons.

Each push of the button changes the power level by
1% within the range from 100% to 50%.

* The factory default is 75%.

Setting of power level in
power saving mode

4. Determine the setting by pushing button.

5. Push button to complete the setting.

–26–

EN

26-EN

4-way Air Discharge Cassette Type

Installation Manual

 Remote control switch

monitoring function

This function is available to call the service monitor
mode from the remote control during a test run to
acquire temperatures of sensors of the remote control,
indoor unit, and outdoor unit.

1. Push and
4 seconds to call the service monitor mode.
The service monitor indicator lights up and the
header indoor unit number is displayed first. CODE
No. is also displayed.

2. Pushing TEMP. buttons, select the
number of sensor, etc. (CODE No.) to be monitored.
(See the following table.)

3. Pushing
indoor unit to be monitored. The sensor
temperatures of indoor units and their outdoor unit in
the control group are displayed.

4. Push

button to return to the normal display.

buttons simultaneously for at least

(left side of the button), select an

Outdoor unit data

CODE No. Data name

60

61 Outside air temperature (TO)

62

63

64 —
65 Heatsink temperature (THS)
6A Operating current (x1/10)

F1

Outdoor unit heat exchanger

temperature (TE)

Compressor discharge air temperature

(TD)

Compressor intake air temperature

(TS)

Compressor cumulative operating

hours (x100h)

2

4

13

Indoor unit data

CODE No. Data name

01 Room temperature (remote control)
02 Indoor unit intake air temperature (TA)

03

04

F3

F8 Indoor unit discharge air temperature

Indoor unit heat exchanger

temperature (TCJ)

Indoor unit heat exchanger

temperature (TC)

Indoor unit fan cumulative operating

hours (x1 h)

27-EN

–27–

4-way Air Discharge Cassette Type

Installation Manual

Group control for system of multiple units

One remote control can control maximum 8 indoor
units as a group.

▼ Group control in single system

Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit

Indoor unitIndoor unitIndoor unitIndoor unitIndoor unit

Remote
control

• For wiring procedure and wiring method of the

individual line (Identical refrigerant line) system,
follow to “Electric work”.

• Wiring between lines is performed in the following

procedure.
Connect the terminal block (A/B) of the indoor unit
connected with a remote control to the terminal
blocks (A/B) of the indoor units of other indoor units
by wiring the inter-unit wire of the remote control.

• When the circuit breaker is turned on, the automatic

address setup starts and which indicates that
address is being set up flashes on the display part.
During setup of automatic address, the remote
control operation is not accepted.

Finish of address setup by power-ON

(Max. 8 units)

Required time up to the finish of automatic
addressing is approx. 5 minutes.

NOTE

In some cases, it is necessary to change the address
manually after setup of the automatic address
according to the system configuration of the group
control.

• The above mentioned system configuration is a
case when complex systems in which systems of
the multiple twin unit is controlled as a group by a
remote control.

Procedure example 1

Manual address setup procedure

While the operation stops, change the setup.
(Be sure to stop the operation of the unit.)

7

3
4
5

-2,

-2,

-2

7

3

4
5

3
4
5

-1,

-1,

-1,

-3,

-3,

-3,

2,61

Procedure 1

Push simultaneously + + buttons for 4
seconds or more. After a while, the display part flashes
as shown below. Check the displayed CODE No. is
[10].

• When the CODE No. is other than [10], push

button to erase the display and repeat procedure
from the first step.
(After pushing
control is not accepted for approx. 1 minute.)
(For a group control, No. of the firstly displayed
indoor unit becomes the header unit.)

button, operation of the remote

(* Display changes according to

the model No. of indoor unit.)

Procedure 2

Every pushing button, the indoor UNIT No. in
the group control is displayed in order. Select the
indoor unit of which setup is changed.

In this time, the position of the indoor unit of which
setup is changed can be confirmed because fan and
louver of the selected indoor unit operate.

–28–

EN

28-EN

4-way Air Discharge Cassette Type

Installation Manual

Procedure 3

1. Using temp. setup / buttons, specify CODE

No. [12].
(CODE No. [12]: Line address)

2. Using timer time / buttons, change the line

address from [3] to [2].

3. Push button.
In this time, the setup finishes when the display
changes from flashing to lighting.

Indoor UNIT No. before setup change is displayed.

Procedure 4

1. Using temp. setup / buttons, specify CODE
No. [13].
(CODE No. [13]: Indoor address)

2. Using timer time / buttons, change the indoor
address from [3] to [2].

3. Push button.
In this time, the setup finishes when the display
changes from flashing to lighting.

Indoor UNIT No. before setup change is displayed.

Procedure 5

1. Using temp. setup / buttons, specify CODE

No. [14].
(CODE No. [14]: Group address)

2. Using timer time / buttons, change the setup

data from [0001] to [0002].
(Setup data [Header unit: 0001] [Follower unit:
0002])

3. Push button.
In this time, the setup finishes when the display
changes from flashing to lighting.

Indoor UNIT No. before setup change is displayed.

Procedure 6

If there is other indoor unit to be changed, repeat
procedure

2 to 5 to change the setup.

When the above setup has finished, push to
select the indoor UNIT No. before change of setup,
specify CODE No. [12], [13], [14] in order with temp.
setup / buttons, and then check the changed
contents.

Address change check Before change:
[3-3-1] → After change: [2-2-2]

Pushing button clears the contents of which setup
was changed.
(In this case, procedure from

Indoor UNIT No. before setup change is displayed.

2 is repeated.)

29-EN

–29–

4-way Air Discharge Cassette Type

Installation Manual

Procedure 7

After check of the changed contents, push button.
(Setup is determined.) When pushing
display disappears and the status becomes the usual
stop status. (When pushing
from the remote control is not accepted for approx.
1 minute.)

* If the operation from the remote control is not

accepted even 1 minute or more passed after
pushing
setup is incorrect.
In this case, the automatic address must be again
set up.
Therefore repeat procedure of the setup change
from the Procedure

button, it is considered that the address

button the operation

1.

button, the

To recognize the position of the
corresponding indoor unit though the
indoor UNIT No. is known

Check the position during operation stop.
(Be sure to stop operation of the set.)

Procedure 1

Push simultaneously + buttons for 4 seconds
or more.
After a while, the display part flashes and the display
appears as shown below.

In this time, the position can be checked because fan
and louver of the indoor unit operate.

• For the group control, the indoor UNIT No. is

displayed as [ ] and fans and louvers of all the
indoor units in the group control operate.

Check the displayed CODE No. is [01].

• When the CODE No. is other than [01], push

button to erase the display and repeat procedure
from the first step.
(After pushing
control is not accepted for approx. 1 minute.)

button, operation of the remote

(* Display changes according to

the model No. of indoor unit.)

Procedure 2

In the group control, every pushing button, the
indoor UNIT No. in the group control is displayed in
order.

In this time, the position of the indoor unit can be
confirmed because only fan and louver of the selected
indoor unit operate.
(For a group control, No. of the firstly displayed indoor
unit becomes the header unit.)

1,3

2

1

Procedure 3

After confirmation, push button to return the mode
to the usual mode.

When pushing
the status becomes the usual stop status.
(When pushing
remote control is not accepted for approx. 1 minute.)

button, the display disappears and

button the operation from the

EN

–30–

30-EN

4-way Air Discharge Cassette Type

9 TEST RUN

Installation Manual

 Before test run

• Before turning on the circuit breaker, carry out the
following procedure.

1) Using 500V-megger, check that resistance of

1MΩ or more exists between the terminal block L
to L

2 and the ground (grounding).

If resistance of less than 1MΩ is detected, do not
run the unit.

2) Check the valve of the outdoor unit being opened

fully.

• To protect the compressor at activation time, leave
power-ON for 12 hours or more be for operating.

 Execute a test run

Using the remote control, operate the unit as usual.
For the procedure of the operation, refer to the

attached Owner’s Manual.
A forced test run can be executed in the following
procedure even if the operation stops by thermo.-OFF.
In order to prevent a serial operation, the forced test
run is released after 60 minutes have passed and
returns to the usual operation.

CAUTION

• Do not use the forced test run for cases other than the
test run because it applies an excessive load to the
devices.

Wired remote control

1

1,5

Procedure 1

Keep button pushed for 4 seconds or more. [TEST]
is displayed on the display part and the selection of
mode in the test mode is permitted.

Procedure 2

Push button.

Procedure 3

Using button, select the operation mode,
[COOL] or [HEAT].

• Do not run the air conditioner in a mode other than
[COOL] or [HEAT].

• The temperature controlling function does not work
during test run.

• The detection of error is performed as usual.

2, 4
3

31-EN

Procedure 4

After the test run, push button to stop a test
run.

(Display part is same as procedure 1.)

Procedure 5

Push check button to cancel (release from) the test
run mode.

([TEST] disappears on the display and the status
returns to a normal.)

–31–

4-way Air Discharge Cassette Type

Installation Manual

Wireless remote control

Procedure 1

Turn on the power of the air conditioner.
When power is turned on for the first time after

installation, it takes approx. 5 minutes until the remote
control becomes available. In the case of subsequent
power-on, it takes approx. 1 minute until the remote
control becomes available. Execute a test run after the
predetermined time has passed.

Procedure 2

Push “ON/OFF” button on the remote control, select
[COOL] or [HEAT] with “MODE” button, and then select
[HIGH] with “FAN” button.

Procedure 3

Cooling test run Heating test run
Set the temperature to 64 °F

(18°C) with the temp. setup

buttons.

Procedure 4

Cooling test run Heating test run

After confirming a signal
receiving sound “beep”
immediately set the
temperature to 66 °F (19°C)
with the temp. setup buttons.

Set the temperature to 86 °F
(30°C) with the temp. setup
buttons.

After confirming a signal
receiving sound “beep”
immediately set the
temperature to 84 °F (29°C)
with the temp. setup buttons.

▼ Heating test run:

ON/OFF → 86 °F (30 °C) → 84 °F (29 °C) → 86 °F (30
°C) → 84 °F (29 °C) → 86 °F (30 °C) → 84 °F (29 °C)
→ 86 °F (30 °C) → (test run) → ON/OFF

Always select
[HIGH] fan
speed.

2

3, 4,

5, 6

2

2,7

Procedure 5

Cooling test run Heating test run

After confirming a signal
receiving sound “beep”
immediately set the
temperature to 64 °F (18°C)
with the temp. setup buttons.

After confirming a signal
receiving sound “beep”
immediately set the
temperature to 86 °F (30°C)
with the temp. setup buttons.

Procedure 6

Repeat procedures 4 → 5 → 4 → 5.
Indicators “Operation” (green), “Timer” (green), and
“Ready” (orange) in the wireless receiver section flash
in approx. 10 seconds, and the air conditioner starts
operation. If any of these indicators does not flash,
repeat procedures

2 to 5.

Procedure 7

Upon completion of the test run, push “ON/OFF” button
to stop operation.

<Overview of test run operations using the
wireless remote control>

▼ Cooling test run:

ON/OFF → 64 °F (18 °C) → 66 °F (19 °C) → 64 °F (18
°C) → 66 °F (19 °C) → 64 °F (18 °C) → 66 °F (19 °C)
→ 64 °F (18 °C) → (test run) → ON/OFF

EN

–32–

32-EN

4-way Air Discharge Cassette Type

10TROUBLESHOOTING

Installation Manual

 Confirmation and check

When a trouble occurred in the air conditioner, the
check code and the indoor UNIT No. appear on the
display part of the remote control.

The check code is only displayed during the operation.
If the display disappears, operate the air conditioner

according to the following “Confirmation of error
history” for confirmation.

Check code Indoor UNIT No. in

which an error occurred

 Confirmation of error history

When a trouble occurred on the air conditioner, the
trouble history can be confirmed with the following
procedure. (The trouble history is stored in memory up
to 4 troubles.)

The history can be confirmed from both operating
status and stop status.

Procedure 2

Every pushing of button used to set
temperature, the trouble history stored in memory is
displayed in order.

The numbers in CODE No. indicate CODE No. [01]
(latest) → [04] (oldest).

REQUIREMENT

Do not push button because all the trouble history
of the indoor unit will be deleted.

Procedure 3

After confirmation, push button to return to the
usual display.

1. Check the troubles according to the above

procedure.

2. Ask an authorized dealer or qualified service

(maintenance) professional to repair or maintain the
air conditioner.

2

3

Procedure 1

When pushing and buttons at the same time for
4 seconds or more, the following display appears.
If [Service check] is displayed, the mode enters in
the trouble history mode.

•[01 : Order of trouble history] is displayed in CODE

No. window.

• [Check code] is displayed in CHECK window.

• [Indoor unit address in which an error occurred] is
displayed in Unit No.

1

33-EN

–33–

4-way Air Discharge Cassette Type

 Check codes and parts to be checked

Installation Manual

Wired

remote

control

display

Indication

E01

E02

E03

E04

E08

E09

E10

E18

E31

F01 ALT

F02 ALT

F04 ALT

F06 ALT

F07

(F06)

F08 ALT

F10 ALT

F12

(F06)

F13

(L29)

F15

(F06)

F29 SIM

Wireless remote control

Sensor block display of

receiving unit

Operation Timer Ready
GR GR OR

Main defective parts

Flashing

No header remote
control

Remote control
communication error

Remote control
transmission error

Indoor unit-remote
control regular
communication error

Indoor unit-outdoor
unit serial
communication error

IPDU-CDB
communication error

Duplicated indoor
addresses

Duplicated header
remote controls

CPU-CPU
communication error

Header indoor unit­indoor follower unit
regular communication
error

IPDU communication
error

Indoor unit heat
exchanger sensor
(TCJ) error

Indoor unit heat
exchanger sensor (TC)
error

Outdoor unit discharge
temp. sensor (TD)
error

Outdoor unit temp.
sensor (TE/TS) error

ALT TL sensor error Outdoor

Outdoor unit outside
air temp. sensor error

Indoor unit room temp.
sensor (TA) error

ALT TS sensor error Outdoor

ALT Heat sink sensor error Outdoor

Temp. sensor

ALT

connection error

Indoor unit, other P.C.
board error

Judging

device

Remote
control

Remote
control

Indoor

Indoor

Indoor

Remote
control

Indoor

Indoor

Outdoor Communication error between IPDU and CDB Entire stop

Indoor

Indoor

Outdoor

Outdoor

Outdoor

Indoor

Outdoor Temp. sensor (TE/TS) may be connected incorrectly. Entire stop

Indoor Indoor P.C. board --- EEPROM error Auto-reset

Parts to be checked / error description

Incorrect remote control setting --- The header remote
control has not been set (including two remote controls).

No signal can be received from the indoor unit.

System interconnection wires, indoor P.C. board, remote
control

--- No signal can be sent to the indoor unit.

Remote control, network adapter, indoor P.C. board --­No data is received from the remote control or network
adapter.

System interconnection wires, indoor P.C. board,
outdoor P.C. board --- Serial communication error
between indoor unit and outdoor unit

Indoor address setting error --- The same address as the
self-address was detected.

Remote control address setting error --- Two remote
controls are set as header in the double-remote control
control.

(* The header indoor unit stops raising alarm and follower
indoor units continue to operate.)

Indoor P.C. board --- Communication error between main
MCU and motor microcomputer MCU

Indoor P.C. board --- Regular communication is not
possible between header and follower indoor units or
between twin header (main) and follower (sub) units.

Heat exchanger sensor (TCJ) , indoor P.C. board --­Open-circuit or short-circuit of the heat exchanger sensor
(TCJ) was detected.

Heat exchanger sensor (TC), indoor P.C. board --- Open­circuit or short-circuit of the heat exchanger sensor (TC)
was detected.

Outdoor temp. sensor (TD), outdoor P.C. board --- Open­circuit or short-circuit of the discharge temp. sensor was
detected.

Outdoor temp. sensors (TE/TS), outdoor P.C. board --­Open-circuit or short-circuit of the heat exchanger temp.
sensor was detected.

TL sensor may be displaced, disconnected or short­circuited.

Outdoor temp. sensor (TO), outdoor P.C. board --- Open­circuit or short-circuit of the outdoor air temp. sensor was
detected.

Room temp. sensor (TA), indoor P.C. board --- Open­circuit or short-circuit of the room temp. sensor (TA) was
detected.

TS sensor may be displaced, disconnected or short­circuited.

Abnormal temperature was detected by the temp. sensor
of the IGBT heat sink.

Air

conditioner

status

*

*

Auto-reset

Auto-reset

Auto-reset

*

Auto-reset

Auto-reset

Auto-reset

Auto-reset

Entire stop

Entire stop

Entire stop

Operation
continued

Auto-reset

Entire stop

Entire stop

EN

–34–

34-EN

4-way Air Discharge Cassette Type

Installation Manual

F31

(L29)

H01

H02

H03

H04

(P04)

H06

L03 SIM

L07 SIM

L08 SIM

L09 SIM

L10

(L29)

L20 SIM

L29 SIM

L30 SIM

L31 SIM

P01 ALT Indoor unit fan error Indoor

P03 ALT

P04 ALT

P05

(P04)

P07 ALT Heat sink overheat Outdoor

P10 ALT

P15

(L29)

P19

(L29)

P20

(P04)

Outdoor unit P.C.

SIM

board

Outdoor unit
compressor
breakdown

Outdoor unit
compressor lock

Outdoor unit current
detect circuit error

Case thermostat
operation

Outdoor unit low­pressure system error

Duplicated header
indoor units

Group line in individual
indoor unit

Indoor group address
not set

Indoor power level not
set

Outdoor unit P.C.

SIM

board

LAN communication
error

Other outdoor unit
error

Abnormal external
input into indoor unit
(interlock)

Phase sequence error,
etc.

Outdoor unit discharge
temp. error

Outdoor unit high­pressure system error

ALT Open phase detected Outdoor

Indoor unit water
overflow detected

ALT Gas leakage detected Outdoor

ALT 4-way valve error

High-pressure

ALT

protective operation

Outdoor Outdoor P.C. board ---- In the case of EEPROM error. Entire stop

Outdoor

Outdoor

Outdoor

Outdoor Malfunction of the case thermostat Entire stop

Outdoor

Indoor

Indoor

Indoor

Indoor Indoor power level has not been set. Entire stop

Outdoor

Network
adapter
central
control

Outdoor

Indoor

Outdoor

Outdoor

Outdoor

Indoor

Outdoor
(Indoor)

Outdoor High-pressure protection Entire stop

Current detect circuit, power voltage --- Minimum
frequency was reached in the current releasing control or
short-circuit current (Idc) after direct excitation was
detected
Wiring error of compressor (open phase)

Compressor circuit --- Compressor lock was detected.
Wiring error of compressor (open phase)

Current detect circuit, outdoor unit P.C. board --­Abnormal current was detected in AC-CT or a phase loss
was detected.

Current, high-pressure switch circuit, outdoor P.C. board

--- Ps pressure sensor error was detected or low-pressure
protective operation was activated.

Indoor address setting error --- There are two or more
header units in the group.

Indoor address setting error --- There is at least one
group-connected indoor unit among individual indoor
units.

Indoor address setting error --- Indoor address group has
not been set.

In the case of outdoor P.C. board jumper wire (for service)
setting error

Address setting, central control remote control, network
adapter --- Duplication of address in central control
communication

Other outdoor unit error Entire stop

1) Communication error between IPDU MCU and CDB
MCU

2) Abnormal temperature was detected by the heat sink
temp. sensor in IGBT.

External devices, outdoor unit P.C. board --- Abnormal
stop due to incorrect external input into CN80

Power supply phase sequence, outdoor unit P.C. board -

-- Abnormal phase sequence of the 3-phase power
supply

Indoor fan motor, indoor P.C. board --- Indoor AC fan
error (fan motor thermal relay activated) was detected.

An error was detected in the discharge temp. releasing
control.

High-pressure switch --- The IOL was activated or an
error was detected in the high-pressure releasing control
using the TE.

The power cable may be connected incorrectly. Check
open phase and voltages of the power supply.

Abnormal temperature was detected by the temp. sensor
of the IGBT heat sink.

Drain pipe, clogging of drainage, float switch circuit,
indoor P.C. board --- Drainage is out of order or the float
switch was activated.

There may be gas leakage from the pipe or connecting
part. Check for gas leakage.

4-way valve, indoor temp. sensors (TC/TCJ) --- An error
was detected due to temperature drop of the indoor unit
heat exchanger sensor when heating.

Entire stop

Entire stop

Entire stop

Entire stop

Entire stop

Entire stop

Entire stop

Entire stop

Auto-reset

Entire stop

Entire stop

Operation
continued

(thermostat

OFF)

Entire stop

Entire stop

Entire stop

Entire stop

Entire stop

Entire stop

Entire stop

Auto-reset

(Auto-reset)

35-EN

–35–

4-way Air Discharge Cassette Type

Installation Manual

P22 ALT Outdoor unit fan error Outdoor

P26 ALT

P29 ALT

P31 ALT Other indoor unit error Indoor

Check codes in parentheses ( ) are displayed when connected to an outdoor unit other than the new SDI series.

: Lighting : Flashing : OFF : The air conditioner automatically enters the auto-address setting mode.

ALT: When two LEDs are flashing, they flash alternately. SIM: When two LEDs are flashing, they flash in synchronization.
Receiving unit display OR: Orange GR: Green

Outdoor unit inverter
Idc activated

Outdoor unit position
error

Outdoor

Outdoor

Outdoor unit fan motor, outdoor unit P.C. board --- An
error (overcurrent, locking, etc.) was detected in the
outdoor unit fan drive circuit.

IGBT, outdoor unit P.C. board, inverter wiring,
compressor --- Short-circuit protection for compressor
drive circuit devices (G-Tr/IGBT) was activated.

Outdoor unit P.C. board, high-pressure switch --­Compressor motor position error was detected.

Another indoor unit in the group is raising an alarm. Entire stop

E03/L07/L03/L08 alarm check locations and error
description

Entire stop

Entire stop

Entire stop

Auto-reset

–36–

EN

36-EN

EH99864701