Toshiba RAV-SM2242DT-E User manual

Indoor Unit
Model name:
Concealed Duct High Static Pressure Type
RAV-SM2242DT-E
RAV-SM2802DT-E
AIR CONDITIONER (SPLIT TYPE)
Installation Manual
Installation Manual
English
For commercial use

–1–
Original instruction
Contents
1 Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2 Accessory parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3 Selection of installation place. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
5 Fan characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
6 Drain piping work. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
7 Refrigerant piping and evacuating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
8 Electrical connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
9 Applicable controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
10 Test run. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
11 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
12 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
ADOPTION OF NEW REFRIGERANT
This Air Conditioner uses R410A an environmentally friendly refrigerant.
Thank you for purchasing this Toshiba air conditioner.
Please read carefully through these instructions that contain important information which complies with the
“Machinery” Directive (Directive 2006/42/EC), and ensure that you understand them.
After reading these instructions, be sure to keep them in a safe place together with the Owner’s Manual and
Installation Manual supplied with your product.
Generic Denomination: Air Conditioner
Definition of Qualified Installer or Qualified Service Person
The air conditioner mustbe installed, maintained, repaired and removed by a qualified installer or qualified service
person. When anyof these jobs is to be done, ask aqualified installer or qualified service person todo them for you.
A qualified installer or qualified service person is an agent who has the qualifications and knowledge described in
the table below.
Agent Qualifications and knowledge which the agent must have
Qualified installer
• The qualifiedinstalleris a person who installs, maintains, relocates and removes the air conditioners
made by Toshiba Carrier Corporation. He or she has been trained to install, maintain, relocate and
removethe air conditioners madeby Toshiba Carrier Corporationor, alternatively,he or she hasbeen
instructed in such operations by an individual or individuals who have been trained and is thus
thoroughly acquainted with the knowledge related to these operations.
• The qualified installer who is allowed to do the electrical work involved in installation, relocation and
removal has the qualifications pertaining to this electrical work as stipulated by the local laws and
regulations, and he or she is a person who has been trained in matters relating to electrical work on
the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been
instructed in such matters by an individual or individuals who have been trained and is thus thoroughly
acquainted with the knowledge related to this work.
• The qualified installer who is allowed to do the refrigerant handling and piping work involved in
installation, relocation and removal has the qualifications pertaining to this refrigerant handling and
piping work as stipulated by the local laws and regulations, and he or she is a person who has been
trained in matters relating to refrigerant handling and piping work on the air conditioners made by
Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such matters by an
individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge
related to this work.
• The qualified installerwho is allowed to work at heightshas been trained inmatters relating toworking
at heights with the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she
has been instructed in such matters by an individual or individuals who have been trained and is thus
thoroughly acquainted with the knowledge related to this work.
Qualified service
person
• The qualified service person is a person who installs, repairs, maintains, relocates and removes the
air conditioners made by Toshiba Carrier Corporation. He or she has been trained to install, repair,
maintain, relocate and remove the air conditioners made by Toshiba Carrier Corporation or,
alternatively,heorshehasbeeninstructedinsuchoperationsbyanindividualorindividualswhohave
been trained and is thus thoroughly acquainted with the knowledge related to these operations.
• The qualified service person who is allowed to do the electrical work involved in installation, repair,
relocationandremovalhasthequalificationspertainingtothiselectricalworkas stipulatedbythe local
laws and regulations, and he or she is a person who has been trainedin matters relating to electrical
work onthe airconditioners madeby Toshiba Carrier Corporation or, alternatively,heor she hasbeen
instructed in such matters by an individual or individuals who have been trained and is thus thoroughly
acquainted with the knowledge related to this work.
• The qualifiedservice personwho is allowed todo the refrigerant handling and piping workinvolvedin
installation, repair, relocation and removal has the qualifications pertaining to this refrigerant handling
and piping work as stipulated by the local laws and regulations, and he or she is a person who has
been trained in matters relating to refrigerant handling and piping work on the air conditioners made
by Toshiba Carrier Corporation or, alternatively, he or she has beeninstructed in such matters by an
individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge
related to this work.
• The qualified service person who is allowed to work at heights has been trained in matters relating to
working at heights with the air conditioners made by Toshiba Carrier Corporation or, alternatively, he
or she has been instructed in such matters by an individual or individuals who have been trained and
is thus thoroughly acquainted with the knowledge related to this work.
1-EN 2-EN

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EN
Definition of Protective Gear
When the air conditioner is to be transported, installed, maintained, repaired or removed, wear protective gloves
and ‘safety’ work clothing.
In addition to suchnormal protective gear, wearthe protective gear described below when undertaking the special
work detailed in the table below.
Failure to wear the proper protective gear is dangerous because you will be more susceptible to injury, burns,
electric shocks and other injuries.
Center of gravity (Unit: mm)
Work undertaken Protective gear worn
All types of work Protective gloves
‘Safety’ working clothing
Electrical-related
work Gloves to provide protection for electricians and from heat
Insulating shoes
Clothing to provide protection from electric shock
Work done at heights
(50 cm or more) Helmets for use in industry
Transportation of
heavy objects Shoes with additional protective toe cap
Repair of outdoor unit Gloves to provide protection for electricians and from heat
Use forklift to carry in the air conditioner units and use
winch or hoist at installation of them.
660 205
540
Centre of gravity
Warning indications on the air conditioner unit
Warning indication Description
WARNING
ELECTRICAL SHOCK HAZARD
Disconnect all remote electric power supplies before servicing.
WARNING
Moving parts.
Do not operate unit with grille removed.
Stop the unit before the servicing.
CAUTION
High temperature parts.
You might get burned when removing this panel.
CAUTION
Do not touch the aluminium fins of the unit.
Doing so may result in injury.
CAUTION
BURST HAZARD
Open the servicevalves before the operation, otherwisethere might be
the burst.
WARNING
ELECTRICAL SHOCK HAZARD
Disconnect all remote
electric power supplies
before servicing.
WARNING
Moving parts.
Do not operate unit with grille
removed.
Stop the unit before the servicing.
CAUTION
High temperature parts.
You might get burned
when removing this panel.
CAUTION
Do not touch the aluminum
fins of the unit.
Doing so may result in injury.
CAUTION
BURST HAZARD
Open the service valves before
the operation, otherwise there
might be the burst.
3-EN 4-EN

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1Precautions for safety
The manufacturer shall not assume any liability for the damage caused by not observing the description of this
manual.
WARNING
General
• Before starting to install the air conditioner, read carefully through the Installation Manual, and follow its instructions
to install the air conditioner.
• Only a qualified installer(*1) or qualified service person(*1) is allowed to install the air conditioner. If the air conditioner
is installed by an unqualified individual, a fire, electric shocks, injury, water leakage, noise and/or vibration may result.
• Do not use any refrigerant different from the one specified for complement or replacement. Otherwise, abnormally
high pressure may be generated in the refrigeration cycle, which may result in a failure or explosion of the product or
an injury to your body.
• Before opening the intake grille of the indoor unit or service panel of the outdoor unit, set the circuit breaker to the
OFF position. Failure to set the circuit breaker to the OFF position may result in electric shocks through contact with
the interior parts. Only a qualified installer(*1) or qualified service person(*1) is allowed to remove the intake grille of
the indoor unit or service panel of the outdoor unit and do the work required.
• Before carrying out the installation, maintenance, repair or removal work, be sure to set the circuit breaker to the OFF
position. Otherwise, electric shocks may result.
• Place a “Work in progress” sign near the circuit breaker while the installation, maintenance, repair or removal work
is being carried out. There is a danger of electric shocks if the circuit breaker is set to ON by mistake.
• Only a qualified installer(*1) or qualified service person(*1) is allowed to undertake work at heights using a stand of
50 cm or more or to remove the intake grille of the indoor unit to undertake work.
• Wear protective gloves and safety work clothing during installation, servicing and removal.
• Do not touch the aluminium fin of the outdoor unit. You may injure yourself if you do so. If the fin must be touched for
some reason, first put on protective gloves and safety work clothing, and then proceed.
• Do not climb onto or place objects on top of the outdoor unit. You may fall or the objects may fall off of the outdoor
unit and result in injury.
• When working at heights, use a ladder which complies with the ISO 14122 standard, and follow the procedure in the
ladder’s instructions. Also wear a helmet for use in industry as protective gear to undertake the work.
• When cleaning the filter or other parts of the outdoor unit, set the circuit breaker to OFF without fail, and place a “Work
in progress” sign near the circuit breaker before proceeding with the work.
• When working at heights, put a sign in place so that no-one will approach the work location, before proceeding with
the work. Parts and other objects may fall from above, possibly injuring a person below.
• The refrigerant used by this air conditioner is the R410A.
• You shall ensure that the air conditioner is transported in stable condition.
• Do not move or repair any unit by yourself. There is high voltage inside the unit. You may get electric shock when
removing the cover and main unit.
Selection of installation location
• If you install the unit in a small room, take appropriate measures to prevent the refrigerant from exceeding the limit
concentration even if it leaks. Consult the dealer from whom you purchased the air conditioner when you implement
the measures. Accumulation of highly concentrated refrigerant may cause an oxygen deficiency accident.
• Do not install the air conditioner in a location that may be subject to a risk of exposure to a combustible gas. If a
combustible gas leaks and becomes concentrated around the unit, a fire may occur.
• When transporting the air conditioner, wear shoes with additional protective toe caps.
• When transporting the air conditioner, do not take hold of the bands around the packing carton. You may injure
yourself if the bands should break.
• Install the indoor unit at least 2.5 m above the floor level since otherwise the users may injure themselves or receive
electric shocks if they poke their fingers or other objects into the indoor unit while the air conditioner is running.
• Do not place any combustion appliance in a place where it is directly exposed to the wind of air conditioner, otherwise
it may cause imperfect combustion.
Installation
• When the indoor unit is to be suspended, the designated hanging bolts (M10 or W3/8) and nuts (M10 or W3/8) must
be used.
• Install the air conditioner at enough strong places to withstand the weight of the unit. If the strength is not enough,
the unit may fall down resulting in injury.
• Follow the instructions in the Installation Manual to install the air conditioner. Failure to follow these instructions may
cause the product to fall down or topple over or give rise to noise, vibration, water leakage, etc.
• The designated bolts (M10, M12) and nuts (M10, M12) for securing the outdoor unit must be used when installing the
unit.
• Install the outdoor unit property in a location that is durable enough to support the weight of the outdoor unit.
Insufficient durability may cause the outdoor unit to fall, which may result in injury.
• Suction duct length must be longer than 850 mm.
• Helmet must be worn to protect your head from falling objects.
Especially, when you work under an inspection opening, helmet must be worn to protect your head from falling
objects from the opening.
Refrigerant piping
• Install the refrigerant pipe securely during the installation work before operating the air conditioner. If the compressor
is operated with the valve open and without refrigerant pipe, the compressor sucks air and the refrigeration cycles is
over pressurized, which may cause a injury.
• Tighten the flare nut with a torque wrench in the specified manner. Excessive tighten of the flare nut may cause a
crack in the flare nut after a long period, which may result in refrigerant leakage.
• 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 may be generated.
• When the air conditioner has been installed or relocated, follow the instructions in the Installation Manual and purge
the air completely so that no gases other than the refrigerant will be mixed in the refrigerating cycle. Failure to purge
the air completely may cause the air conditioner to malfunction.
• Nitrogen gas must be used for the airtight test.
• The charge hose must be connected in such a way that it is not slack.
• 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 be generated.
Electrical wiring
• Only a qualified installer(*1) or qualified service person(*1) is allowed to carry out the electrical work of the air
conditioner. Under no circumstances must this work be done by an unqualified individual since failure to carry out the
work properly may result in electric shocks and/or electrical leaks.
• When connecting the electrical wires, repairing the electrical parts or undertaking other electrical jobs, wear gloves
to provide protection for electricians and from heat, insulating shoes and clothing to provide protection from electric
shocks. Failure to wear this protective gear may result in electric shocks.
• Use wiring that meets the specifications in the Installation Manual and the stipulations in the local regulations and
laws. Use of wiring which does not meet the specifications may give rise to electric shocks, electrical leakage,
smoking and/or a fire.
• Be sure to connect earth wire. (Grounding work)
Incomplete grounding causes an electric shock.
• Do not connect ground wires to gas pipes, water pipes, and lightning rods or ground wires for telephone wires.
• After completing the repair or relocation work, check that the ground wires are connected properly.
• Install a circuit breaker that meets the specifications in the installation manual and the stipulations in the local
regulations and laws.
• Install the circuit breaker where it can be easily accessed by the agent.
• When installing the circuit breaker outdoors, install one which is designed to be used outdoors.
• Under no circumstances must the power cable be extended. Connection trouble in the places where the cable is
extended may give rise to smoking and/or a fire.
• Electrical wiring work shall be conducted according to law and regulation in the community and installation manual.
Failure to do so may result in electrocution or short circuit.
5-EN 6-EN

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EN
Test run
• Before operating the air conditioner after having completed the work, check that the electrical control box cover of the
indoor unit and service panel of the outdoor unit are closed, and set the circuit breaker to the ON position. You may
receive an electric shock if the power is turned on without first conducting these checks.
• When you have noticed that some kind of trouble (such as when an error display has appeared, there is a smell of
burning, abnormal sounds are heard, the air conditioner fails to cool or heat or water is leaking) has occurred in the
air conditioner, do not touch the air conditioner yourself but set the circuit breaker to the OFF position, and contact a
qualified service person. Take steps to ensure that the power will not be turned on (by marking “out of service” near
the circuit breaker, for instance) until qualified service person arrives. Continuing to use the air conditioner in the
trouble status may cause mechanical problems to escalate or result in electric shocks, etc.
• After the work has finished, be sure to use an insulation tester set (500V Megger) to check the resistance is 2 MΩor
more between the charge section and the non-charge metal section (Earth section). If the resistance value is low, a
disaster such as a leak or electric shock is caused at user’s side.
• Upon completion of the installation work, check for refrigerant leaks and check the insulation resistance and water
drainage. Then conduct a test run to check that the air conditioner is operating properly.
Explanations given to user
• Upon completion of the installation work, tell the user where the circuit breaker is located. If the user does not know
where the circuit breaker is, he or she will not be able to turn it off in the event that trouble has occurred in the air
conditioner.
• If you have discovered that the fan grille is damaged, do not approach the outdoor unit but set the circuit breaker to
the OFF position, and contact a qualified service person(*1) to have the repairs done. Do not set the circuit breaker
to the ON position until the repairs are completed.
• After the installation work, follow the Owner’s Manual to explain to the customer how to use and maintain the unit.
Relocation
• Only a qualified installer(*1) or qualified service person(*1) is allowed to relocate the air conditioner. It is dangerous
for the air conditioner to be relocated by an unqualified individual since a fire, electric shocks, injury, water leakage,
noise and/or vibration may result.
• When carrying out the pump-down work shut down the compressor before disconnecting the refrigerant pipe.
Disconnecting the refrigerant pipe with the service valve left open and the compressor still operating will cause air,
etc. to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level, and possibly
resulting in rupture, injury or other trouble.
(*1) Refer to the “Definition of Qualified Installer or Qualified Service Person.”
CAUTION
New refrigerant air conditioner installation
•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.
To disconnect the appliance from main power supply.
• This appliance must be connected to the main power supply by means of a switch with a contact separation of at
least 3 mm.
The installation fuse must be used for the power supply line of this conditioner.
2Accessory parts
Part name Q’ty Shape Usage
Installation Manual 1 This manual (Be sure to hand over to customers)
(For other languages that do not appear in this Installation Manual,
please refer to the enclosed CD-R.)
Owner’s Manual 1 (Be sure to hand over to customers)
CD-ROM 1 — Owner’s Manual and Installation Manual
Heat insulator 1 For heat insulation of Gas pipe connecting section
1 For heat insulation of Liquid pipe connecting section
Joint (Ø22.2 – Ø28.6 mm) 1 For connecting the gas side pipe
7-EN 8-EN

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3Selection of installation place
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 (fan) in the indoor unit may reduce the performance, generate mist or dew drop, or
deform or damage resin parts.)
• Places where iron or other metal dust is present. If iron or other metal dust adheres to or collects on the interior
of the air conditioner, it may spontaneously combust and start a fire.
• 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 neighbour house. (Outdoor unit)
• Place where noise of the outdoor unit is easily transmitted.
(When install the outdoor unit on the boundary with the neighbour, pay due attention to the level of noise.)
• Place with poor ventilation. (Before air duct installation, check whether value of air volume, static pressure and
duct resistance are correct.)
• Do not use the air conditioner for special purposessuch as preservingfood, precision instruments, or artobjects,
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 controller is used in a room equipped with an inverter-type fluorescent light or at a
place exposed to direct sunlight, signals from the remote controller may not be received correctly.
• Place where organic solvent is used.
• Place where special spray is used frequently.
Installation under high-humidity atmosphere
In some cases including the rainy season, especially inside of the ceiling may become high-humidity atmosphere
(dew-point temperature: 23 °C or higher).
1. Installation to inside of the ceiling with tiles on the roof
2. Installation to inside of the ceiling with slated roof
3. Installation to a place where inside of the ceiling is used for pathway to intake the fresh air
• In the above cases, additionally attach the heat insulator to all positions of the air conditioner, which come to
contact with the high-humidity atmosphere. In this case, arrange the side plate (Check port) so that it is easily
removed.
• Apply also a sufficient heat insulation to the duct and connecting part of the duct.
[Reference] Condensation test conditions
Indoor side: 27 °C dry bulb temperature
24 °C wet bulb temperature
Air volume: Low air volume, operation time 4 hours
Installation space (Unit: mm)
Reserve space required for maintenance the indoor unit and service work.
REQUIREMENT
1. Attach the optional accessories (drain-up kit etc.) on the unit before installing the unit. Also, set the check port
with carrying in port to the side surface of the unit except air intake panel.
2. Prepare the check port with carrying in port hole with the size of 600 x 600 mm.
Filter cleaning sign term setting
The lighting term setup of the filter sign (Notification of filter cleaning) of the remote controller can be changed
according to the condition of installation.
For setup method, refer to “Filter sign setting” and“To secure better effect of heating” in the Applicable controls of
this Manual.
200 or more Servicing space
Air flow direction
1000 or more
Concealed duct
high static pressure
Check port with carrying
in port 600x600
Air flow direction
Concealed
duct high static
pressure
Air discharge chamber
Filter chamber
Air intake chamber
Duct hose Duct hose
Duct hose
<Installation example>
9-EN 10-EN

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EN
4Installation
WARNING
• Install the air conditioner certainly to sufficiently withstand the weight.
• If the strength is insufficient, the unit may fall down resulting in human injury.
• Perform a specified installation work to guard against strong wind or earthquake.
• An incomplete installation can cause accidents by the units falling and dropping.
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.).
• Hanging bolt pitch of air intake chamber side is different (centre position), make sure not to make mistake to install
the setting direction.
• Carry the package by two or more persons, and do not bundle it with plastic band at positions other than specified.
External dimensions (Unit: mm)
1328
1380
100
200 150
31
45 470
624
1250
698
22 46
65
1288 (Hanging bolt pitch)
4-M10 hanging bolt
(Locally procured)
Electrical control box
1260 (Hanging bolt pitch)
Refrigerant pipe connecting port
(Liquid side Ø12.7 Flared)
Drain pipe
connecting port
Refrigerant pipe connecting port
(Gas side Ø22.2 Brazed)
Installation of hanging bolt
• 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, install hanging bolts.
• For the dimensions of the hanging bolt pitches, refer
to the external view.
• When a ceiling already exists, lay the drain pipe,
refrigerant pipe, system interconnection wires, and
remote controller wires to their connection locations
before hanging the indoor unit.
Procure hanging bolts washer and nuts for installing
the indoor unit (these are not supplied).
Installation of hanging bolt
Use M10 hanging bolts (4 pcs, locally procured).
Matching to the existing structure, set pitch according
to size in the unit external view as shown below.
Installation of indoor unit
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.
• Attach the nuts and the M10 flat washers to the
hanging bolt.
• Put washers at up and down of the hanging bracket
of the indoor unit to hang down the indoor unit.
• Using a level vial, check that four sides are
horizontal. (Horizontal degree: Within 5 mm)
• Check that four sides are horizontal using a level
vial. (Horizontal degree: Within 5 mm)
REQUIREMENT
• Hang the unit in a horizontal position.
When unit is hanged to slant, it may cause overflow of
drainage.
• Install the unit within the dimension according to the
figure below.
• Using level vial or vinyl hose to confirm whether the
unit is hang horizontally.
Hanging bolt M10 or W3/8 4 pieces
Nut M10 or W3/8 12 pieces
Washer M10 8 pieces
New concrete slab
Install the bolts with insert brackets or anchor bolts.
Steel flame structure
Use existing angles or install new support angles.
Existing concrete slab
Use a hole-in anchors, hole-in plugs, or a hole-in bolts.
Rubber
Anchor bolt
(Bladetype
bracket) (Slide type
bracket) (Pipe hanging
anchor bolt)
Hanging bolt
Hanging bolt Support angle
Nut
(W3/8 or M10)
M10 flat washer
M10 flat washer
Hanging bolt
(W3/8 or M10)
Nut
(W3/8 or M10)
0 to 5mm
±5mm
Set the air intake and
air discharge sides are
within 5 mm with each
other.
Water pouring
Set the drain pipe
connecting port side
within 5 mm lower than
opposite side.
Front view Side view
Vinyl hose
11-EN 12-EN

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Diagrams for making connecting flanges (Unit: mm)
The connecting flange (Incl. the fixing screw) is not supplied to the indoor unit. When the connecting flange is
necessary, produce them in locally.
Drawing figure is as follows. (Material: Galvanized steel plate, thickness of 1.6 mm)
1130
1080
394 370 344
12 12
25
2525
25
65 250 250 65250250
10-Ø8 hole
<Air discharge port flange>
1130
1080
430 406 380
12 12
25
2525
25
65 250 250 65250250
<Air intake port connecting flange>
10-Ø8 hole
Duct design
1. In order to prevent short circuits, design the duct installation, so that the intake and discharge openings are not
adjacent to each other.
2. The indoor unit does not have a built-in air filter. Make sure to set up the filter chamber etc. and install the air
filter (Locally procured). If no air filter is installed, the heat exchanger will be blocked by dust, which may cause
the malfunction of air conditioner or the water leakage.
NOTE
All duct connection between units except outdoor unit must be procured and enforced locally.
Duct hose (with heat insulation)
Flexible duct hanging band
Air discharge chamber
(with heat insulation)
Air discharge port
connecting flange
Indoor unit
High efficiency filter
inserting port
Pre filter
inserting port
Air intake port
connecting flange
Air intake
chamber
Filter
chamber
Electrical control
box
from ground floor
Duct hose
Check port or carrying
in port (600 x 600)
Check port cap
Ceiling
Air discharge port
Air discharge port
to ground floor
<Duct installation example (First floor)>
13-EN 14-EN

–8–
EN
5Fan characteristics
Current value as a criterion, adjust the air volume value to become within the range of the chart below.
<RAV-SM2242 Type>
4
4.5
5
5.5
6
6.5
7
7.5
8
30002800 3400 3800 4200 4400
2880 3200 3600 4000 4320
5
50
100
150
200
250
300
Air volume (m³/h)
Lower limit of air volume Upper limit of air volume
Standard air volume: 3600 m³/h
High static pressure tap (50 Hz)
Medium static pressure tap (50 Hz)
Low static pressure tap (50 Hz)
Current of fan motor (A)
External static pressure (Pa)
Medium static pressure tap (50 Hz)
High static pressure tap (50 Hz)
Low static pressure tap (50 Hz)
REQUIREMENT
Add a air volume damper to the air supply duct, and adjust the air volume in the range from 80 % to 120 % of the
standard air volume.
<RAV-SM2802 Type>
4
4.5
5
5.5
6
6.5
7
7.5
8
8.5
34003200 3800 4200 4600 5000 5200
3360 3600 4000 4400 4800 5040
5
50
100
150
200
250
300
350
Air volume (m³/h)Lower limit of air volume Upper limit of air volume
Standard air volume: 4200 m³/h
High static pressure tap (50 Hz)
Low static pressure tap (50 Hz)
Current of fan motor (A)
External static pressure (Pa)
High static pressure tap (50 Hz)
Medium static pressure tap (50 Hz)
Low static pressure tap (50 Hz)
Medium static pressure tap (50 Hz)
15-EN 16-EN

–9–
Wire connection change of fan motor
This duct is composed of 3 fan motors.
To change external static pressure by duct resistance, connect the 3 connectors of the orange lead wiresthat are
connected to the underside of the fan tap changing terminal block to the same number (F1, F2 or F3) terminal.
The wires of the fan motor has been connected to (F2) [External static pressure 137 Pa (14 mmAq)] as factory
default.
* Do not use F4.
NOTE
When the external static pressure is changed, write down the static pressure once change in the wiring diagram of the
indoor unit is made.
Terminal block No. Fan motor wiring External static pressure
Pa (mmAq) Remarks
F1 Yellow
Low static pressure 69 (7)
F2 Blue
Middle static pressure 137 (14) Factory default
F3 Orange
High static pressure 196 (20)
F 1 F 2 F 3 F 4
FM
F 1 F 2 F 3 F 4
FM
F 1 F 2 F 3 F 4
FM
Low static pressure (F1)
BLU ORG YEL
ORG
YEL: Yellow
BLU: Blue
ORG: Orange
ORG
ORG
BLU ORG YEL BLU ORG YEL
Fan motor Fan motor Fan motor
FAN3 FAN2 FAN1
F 1 F 2 F 3 F 4
FM
F 1 F 2 F 3 F 4
FM
F 1 F 2 F 3 F 4
FM
Standard (Middle) static pressure (F2)
BLU ORG YEL
ORG
ORG
ORG
BLU ORG YEL
BLU ORG YEL
Electrical control box
Fan tap changing
terminal block
Fan motor Fan motor Fan motor
2P terminal
block
3P terminal
block
4P terminal
block
Control
P.C. board
FAN3 FAN2 FAN1
F 1 F 2 F 3 F 4
FM
F 1 F 2 F 3 F 4
FM
F 1 F 2 F 3 F 4
FM
High static pressure (F3)
BLU ORG YEL
ORG
ORG
ORG
BLU
ORG YEL
BLU
ORG
YEL
Fan motor Fan motor Fan motor
FAN3 FAN2 FAN1
6Drain piping work
CAUTION
Following the Installation Manual, perform the drain piping work that water is properly drained, and apply a heat
insulation not to cause a dew condensation.
Inappropriate piping work may cause the water leakage in the room and wet of furniture.
REQUIREMENT
• The drain piping flows the natural drainage. Make sure to set the drain piping from the unit with descending slope of
1/50 to 1/100 and do not make up-down or trap in the midway.
• Set the horizontal pulling of the drain pipe to 20 m or less. When drain piping is too long, attach the support bracket
at intervals of 1.5 m to 2 m to avoid the pipe becomes undulant as shown in figure below.
• Be sure to connect the drain pipe to the air conditioner with adhesive to avoid water leakage from the joint portion.
• Condensation may occur on the drain pipes including collective pipes. All drain pipes must be wrapped with heat
insulator to prevent dew condensation. Especially a part where drain pipe is connected to the indoor unit must be
firmly insulated with the provided heat insulator.
Pipe material, size and insulator
The following materials for piping work and insulating process are procured locally.
Connecting drain pipe
REQUIREMENT
• Using adhesive agent for vinyl chloride, connect the hard vinyl chloride pipes certainly so that water does not leak.
• It takes some time to dry and indurate the adhesive agent. (Refer to the manual of adhesive agent.) Do not apply any
extra force on the connecting section until the adhesive agent dried.
Drain up
When install the drain up kit of optional accessory, read the Installation Manual supplied to a drain up kit.
Pipe material Hard vinyl chloride pipe socket for VP25
Hard vinyl chloride pipe VP25 (Nominal outer diameter Ø32 mm)
Insulator Foamed polyethylene foam, thickness: 10 mm or more
<Example for installation of the main piping (Incl. piping support)>
Descending slop of
1/50 to 1/100
Descending slop of
1/50 to 1/100
1.5 to 2 m As long as possible
VP-30 Trap
Up-down bend
17-EN 18-EN

–10–
EN
Check the draining
Check if the water can flow out properly during the test run. Also, check if no water leakage from the piping
connection port.
REQUIREMENT
• Do drain test even if installation of heating season.
• Pour water into the drain pan port of the air intake port gently using the kettle or hose when duct is not connected to
the drain pipe. When duct is connected to the drain pipe, remove the Access plate and perform it.
Heat insulating process
After drain check, covering the heat insulator for drain connecting section, wrap the drain pipe with heat insulator
(Locally procured) without clearance from the end of the drain pipe connecting port of the indoor unit.
Access plate
Pour into the drain pan with a hose or
other materials.
Heat insulation (Locally procured)
Thickness 10 mm or more
Indoor unit
Drain pipe connecting port
7Refrigerant piping and evacuating
Refrigerant piping
1. If the outdoor units are to be mounted on a wall,
make sure thatthe 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 general copper pipes with a wall thickness
of 0.8 mm for Ø12.7 mm, and with a wall
thickness of 1.0 mm for Ø28.6 mm (half hard).
Do not use any copper pipes with a wall
thickness less than these thicknesses.
3. Flare nut and flare works are also different from
those of the conventional refrigerant.
Takeout the flarenut attachedto the mainunit of the
air conditioner, and use it.
REQUIREMENT
When the refrigerant pipe is long, provide support
brackets at intervals of 2.5 to 3 m to clamp the refrigerant
pipe. Otherwise, abnormal sound may be generated.
CAUTION
Inportant 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
Liquid side refrigerant pipe
connection
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
• 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.
▼Projection margin in flaring: B (Unit: mm)
Rigid (Clutch type)
▼Flaring dia. meter size: A (Unit: mm)
Pipe size Gas side 28.6 mm
Liquid side 12.7 mm
However, theconventional tools
can be used by adjusting
projection margin of the copper
pipe.
Outer dia. of
copper pipe R410A tool used Conventional
tool used
R410A R410A
12.7 0 to 0.5 1.5 to 2.0
Outer dia. of copper pipe A+0
-0.02" (–0.4)
R410A
12.7 16.6
* In case of flaring for R410A with the
conventional flare tool, pull it out approx.
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.
B
A
19-EN 20-EN

–11–
Tightening connection
CAUTION
Do not apply excessive torque. Otherwise, the nut
may crack depending on the conditions.
▼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 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 refrigeration cycle.
Align the centres 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
Tightening with an excessive torque may crack the nut
depending on installation conditions.
Tighten the nut within the specified tightening torque.
Gas side refrigerant pipe
connection
• Turn up the pipe heat insulator to the unit side.
• Wrap the pipe with wet cloth.
• Remove the cup on the gas side piping by using a
brazing machine.
CAUTION
Do not burn the pipe heat insulator.
• Braze the attached joint part to the gas side piping
and braze the connection piping to the joint part.
• Turn back the pipe heat insulator and tie up with a
banding band.
Piping with 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.
Fordetails, followtothe InstallationManual attachedto
the outdoor unit.
• Never use the refrigerant sealed in the outdoor unit
for evacuation.
REQUIREMENT
For the tools such as charge hose, etc., use those
manufactured exclusively for R410A.
(Unit: N•m)
Outer dia. of copper pipe Tightening torque
12.7 mm (dia.) 50 to 62 (5.0 to 6.2 kgf•m)
Externally
threaded side
Half union Flare nut
Internally
threaded side
Usea wrenchtosecure. Use a torque wrench to tighten.
Turn up pipe heat
insulator
Remove the all
brazed part.
Wet cloth
Remove the cap.
Connection pipe
Locally procured
Ø28.6 mm
Attached joint part
Braze all around
brazing
brazing
Tie up with a banding
band.
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 fix the
compressor and refrigeration cycle malfunction.
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.).
Heat insulation process
Apply heat insulation for the pipes separately at liquid
side and gas side.
For the heat insulation to the pipes at gas side,be sure
to use the material with heat-resisting temperature
120°C or higher.
Using the attached heat insulation material, apply the
heat insulation to the pipe connecting section of the
indoor unit securely without gap.
REQUIREMENT
• Apply the heat insulation to the pipe connecting
section of the indoor unit securely up to the root
without exposure of the pipe. (The pipe exposed to the
outside causes water leak.)
• Wrap heat insulator with its slits facing up (ceiling
side).

–12–
EN
8Electrical connection
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 earth 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 power circuit or incomplete
installation may cause an electric shock or a fire.
CAUTION
• If incorrect / incomplete wiring is carried out, it will
cause an electrical fire or smoke.
• Be sure to install an earth leakage breaker that is not
tripped by shock waves.
If an earth leakage 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.
•Power supply for indoor unit must be exclusive
and separated from the one for outdoor unit.
• For wiring of power supply of the outdoor units, follow
the Installation Manual of each outdoor unit.
• Never connect 220–240 V power to the terminal
blocks ( , , 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.
• After connecting wires to the terminal blocks, provide
a trap and fix wires with the cord clamp.
• Run the refrigerant piping line and control wiring line in
the same line.
• Do not turn on the power of the indoor unit until
vacuuming of the refrigerant pipes completes.
Remote controller wiring
2-core non polarity wire is used for the remote
controller wiring.
Wiring
1. Figure below shows the wiring connections indoor
powerlineandbetweentheindoor andoutdoorunits
and between the indoor units and remote controller.
Thewiresindicatedby thedash linesareprovidedat
the installation place.
2. Insulate the unsheathed redundant cords
(conductors) with electrical insulation tape.
Processthemsothattheydonottouchany electrical
or metal parts.
Wiring diagram
Power and wiring
specification
*Number of wire x wire size
A B
Indoor fan power
supply 220-240 V~, 50 Hz
Maximum running
current 15 A
Fuse rating 25 A
Indoor fan power
supply wire* 3 x 2.5 mm2or more
(H07 RN-F or 60245 IEC 66)
System
interconnection wires* 4 x 1.5 mm2or more
(H07 RN-F or 60245 IEC 66)
L 2
L 3
L 1
N
L
N
1 2 3
A B
1 2 3
Outdoor
unit
Indoor
unit
Indoor Fan Input power
220-240 V~, 50 Hz
Outdoor Input power
380-415 V 3 N~, 50 Hz
Circuit breaker
(Leakage breaker)
Circuit breaker
(Leakage breaker)
Wired remote
controller
Wire connection
REQUIREMENT
• Be sure to connect the wires matching the terminal numbers. Incorrect connection causes a trouble.
• Be sure to pass the wires through the bushing of wire connection holes of the indoor unit.
• Keep a margin (Approx. 100 mm) on a wire to hang down the electrical control box at servicing, etc.
• The low-voltage circuit is provided for the remote controller. (Do not connect the high-voltage circuit)
1. Remove the cover of the electrical control box by taking off the mounting screws (2 positions)
2. Tighten the screws of the terminal block, and fix the wires with cord attached to the electrical control box.
(Do not apply tension to the connecting section of the terminal block.)
3. Mount the cover of the electrical control box without pinching wires.
System interconnection
wire
Cord clamp
Wired remote
controller wire
Electrical
control box
cover
Fixing screw
Bushing
System
interconnecting
terminal block
Indoor fan power
supply terminal
block
<Terminal block of electrical control box>
Wired remote controller
connecting Terminal
block
Indoor fan power supply
wire
23-EN 24-EN

–13–
Remote controller wiring
• Strip off approx. 9 mm the wire to be connected.
• Non polarity, 2 core wire is used for wiring of the
remote controller. (0.5 mm² to 2.0 mm² wires)
Wiring diagram
Group control
R (L)
10
40
10
30
S (N)
Indoor fan power supply wire
(Unit: mm)
1030
1040
321
System interconnection wire
A
BA
B
Terminal block
Remote
controller
unit
Terminal block for
remote controller
wiring of indoor unit
Remote controller wire
(Locally procured)
A B A B
Outdoor unit
Wired remote
controller
Outdoor unit
Indoor unit Indoor unit
9Applicable controls
REQUIREMENT
• When you use this air conditioner for the first time, it
takes approx. 5 minutes until the remote controller
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 controller
becomes available.
<When power is turned on for the second (or later)
time>
It takes approx. 1 minute until the remote controller
becomes available.
• Normal settings were made when the indoor unit
factory default.
Change the indoor unit settings as required.
• Use the wired remote controller to change the
settings.
Changing of setting
applicable control
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.)
1Push button and TEMP. button
simultaneously for at least 4 seconds.
Afterawhile,thedisplayflashesasshownin
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 controller is
accepted for a while after button is pushed.)
2Each time you push button, indoor
unit numbers in the control group change
cyclically. Selectthe indoor unit you want to
change settings for.
The fan of the selected unit runs. You can confirm
the indoor unit for which you want to change
settings.
3Using TEMP. / buttons, specify
CODE No. [ ].
* The settings cannot be changed using the
wireless remote controller, sub remote
controller, or remote-controller-less system (for
centralremotecontrolleronly).Therefore,install
the wired remote controller to change the
settings.
Power on “SETTING”
flashes “SETTING”
goes out Remote
controller is
available
Approx. 5 minutes
Power on “SETTING”
flashes “SETTING”
goes out Remote
controller is
available
Approx. 1 minutes
1
6
1
3
2
5
4
(* Display content varies with
the indoor unit model.)
25-EN 26-EN

–14–
EN
4Using TIME / buttons, select SET
DATA
[].
5Push button. When the display changes
from flashing to lit, the setup is completed.
• To change settings of another indoor unit,
repeat from Procedure 2.
• To change other settings of the selected indoor
unit, repeat from Procedure 3.
Use button to clear the settings.
To make settings after button was pushed,
repeat from Procedure 2.
6When 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 controller is accepted.)
Filter sign setting
According to the installation condition, the filter sign
term (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 3, specify [01].
• For the [SET DATA] in Procedure 4, select the SET
DATA of filter sign term from the following table.
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 3, specify [06].
• For the set data in Procedure 4, select the SET
DATA of shift value of detection temperature to be
set up from the table below.
Power saving mode
1Push button for at least four seconds
when the air conditioner is not working.
flashes.
Indicates CODE No. “C2.”
2Select 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.
SET DATA Filter sign term
0000 None
0001 150 H
0002 2500 H
(Factory default)
0003 5000 H
0004 10000 H
SET DATA Detection temperature shift value
0000 No shift
0001 +1 °C
0002 +2 °C
(Factory default)
0003 +3 °C
0004 +4 °C
0005 +5 °C
0006 +6 °C
UNITNo.
1-1 UNITNo. 1-2 UNITNo. 1-3
UNITNo.
1-4
3Adjust 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 %.
4Determine the setting by pushing button.
5Push button to complete the setting.
Remote controller switch
monitoring function
This function is available to call the service monitor
mode from the remote controller during a test run to
acquire temperatures of sensors of the remote
controller, indoor unit, and outdoor unit.
1Push and buttons simultaneously for
at least 4 seconds tocall the service monitor
mode.
The service monitor indicator lights up and the
header indoor unit number is displayed first.
CODE No. is also displayed.
2Pushing TEMP. buttons, select the
number of sensor, etc. (CODE No.) to be
monitored. (See the following table.)
3Pushing (left side of the button),
select an indoor unit to be monitored. The
sensor temperatures of indoor units and
their outdoor unit in the control group are
displayed.
4Push button to return to the normal
display.
Setting of power level in
power saving mode
13
4
2
Indoor unit data
CODE No. Data name
01 Room temperature (remote controller)
02 Indoor unit intake air temperature (TA)
03 Indoor unit heat exchanger (coil)
temperature (TCJ)
04 Indoor unit heat exchanger (coil)
temperature (TC)
F3 Indoor unit fan cumulative operating hours
(x1 h)
Outdoor unit data
CODE No. Data name
60 Outdoor unit heat exchanger (coil)
temperature (TE)
61 Outside air temperature (TO)
62 Compressor discharge temperature (TD)
63 Compressor suction temperature (TS)
64 —
65 Heatsink temperature (THS)
6A Operating current (x1/10)
F1 Compressor cumulative operating hours
(x100 h)
27-EN 28-EN

–15–
Group control
Group control for system of multiple units
One remote controller can control up to 8 indoor units as a group.
▼Group control in single system
• Forwiring procedureand wiringmethodof the individual line (Identical refrigerantline) system, refer to “Electrical
connection”.
• Wiring between lines is performed in the following procedure.
Connect the terminal block (A/B) of the indoor unit connected with a remote controller to the terminal blocks (A/
B) of the indoor units of other indoor units by wiring the inter-unit wire of the remote controller.
• Whenthe powersupply has beenturnedon, theautomatic addresssetup startsand which indicates thataddress
is being set up flashes on the display part. During setup of automatic address, the remote controller operation is
not accepted.
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.
Outdoor unit
Indoor unit
Remote controller Finish of address setup by power-ON (Max. 8 units)
Indoor unitIndoor unit
Indoor unitIndoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Procedure example 1
Manual address setup procedure
While the operation stops, change the setup.
(Be sure to stop the operation of the unit.)
1Push 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 CODENo. is other than [10], push
button to erase the display and repeat
procedure from the first step.
(After pushing button, operation of the
remote controller is not accepted for
approx. 1 minute.)
(For a group control, No. of the firstly displayed
indoor unit becomes the header unit.)
2Every 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
setupis changed canbeconfirmedbecause fanof
the selected indoor unit operate.
3
1. Using TEMP. / buttons, specifyCODE No.
[12].
(CODE No. [12]: Line address)
2. Using 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.
4
1. Using TEMP. / buttons, specify CODE No.
[13].
(CODE No. [13]: Indoor address)
2. Using 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.
5
1. Using TEMP. / buttons, specify CODE No.
[14].
(CODE No. [14]: Group address)
2. Using TIME / buttons, change the SET
DATA from [0001] to [0002].
(SET DATA [Header unit: 0001] [Follower unit:
0002])
3. Push button.
In this time, the setup finishes when the display
changes from flashing to lighting.
2,61
7
3
-1,
4
5
6
-1,
-1,
7
3 -3,
4 -3,
3 -2,
4 -2,
5 -2
5 -3,
(* Display changes according to
the model No. of indoor unit.)
Indoor unit No. before setup change is displayed.
Indoor unit No. before setup change is displayed.
Indoor UNIT No. before setup change is displayed.
29-EN 30-EN

–16–
EN
6If there is other indoor unit to be changed,
repeat procedure 2to 5to 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
withTEMP. / buttons,andthencheckthe
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 2is repeated.)
7After check of the changed contents, push
button. (Setup is determined.) When
pushing button, the display disappears
and the status becomes the usual stop
status. (When pushing button the
operation from the remote controller is not
accepted for approx. 1 minute.)
* If the operation from the remote controller is not
accepted even 1 minute or more passed after
pushing button, it is considered that the
address setup is incorrect.
In this case, the automatic address must be
again set up.
Therefore repeat procedure of the setup
change from the Procedure 1.
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.)
1Push 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 of the indoor unit operate.
• For the group control, the indoor UNIT No. is
displayed as [ ] and fans of all the indoor
units in the group control operate.
Check the displayed CODE No. is [01].
• When the CODENo. is other than [01], push
button to erase the display and repeat
procedure from the first step.
(After pushing button, operation of the remote
controller is not accepted for approx. 1 minute.)
2In 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 of the selected indoor
unit operate.
(For a group control, No. of the firstly displayed
indoor unit becomes the header unit.)
Indoor UNIT No. before setup change is displayed.
2
1,3 1
(* Display changes according to
the model No. of indoor unit.)
3After confirmation, push button to return
the mode to the usual mode.
When pushing button, the display disappears
and the status becomes the usual stop status.
(When pushing button the operation from the
remote controller is not accepted for approx. 1
minute.)
8 °C operation
Pre-heatingoperationcanbesetfor coldregionswhereroom
temperature drops to below zero.
1Push simultaneously + + buttons
for 4 seconds or more when the air
conditioner is not working.
After a while, the display part flashes as shown
below. Check the Displayed CODE No. is [10].
• WhentheCODENo.is other than[10],push
button to erase the display and repeat
procedure from the first step.
(After pushing button, operation of the
remote controller is not accepted for approx. 1
minute.)
2Every 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 unitof whichsetup is changed can be
confirmed because fan of the selected
indoor unit operate.
3Using TEMP. / buttons, specify
CODE No. [d1].
4Using TIME / buttons, select SET
DATA [0001].
5Push button.
In this time, the setup finishes when the display
changes from flashing to lighting.
6Push button.(Setup is determined.)
When pushing button, the display disappears
and the status
Becomes the usual stop status. (When pushing
buttontheoperationfromtheremotecontroller
is not accepted for approx. 1 minute.)
SET DATA 8 °C Operation setting
0000 None
(Factory default)
0001 8 °C Operation setting
(* Display changes according to
the model No. of indoor unit.)
31-EN 32-EN

–17–
10Test run
Before test run
• Before turning on the power supply, carry out the
following procedure.
1) Using 500 V-megger, check that resistance of
1MΩor more exists between the terminal
block 1 to 3 and the earth (grounding).
If resistance of less than 1 MΩis 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 before operating.
Execute a test run
Using the wired remote controller, 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 thermostat-
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.
1Keep button pushed for 4 seconds or
more.[TEST] isdisplayedon thedisplaypart
and the selection of mode in the test mode is
permitted.
2Push button.
3Using 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.
4After the test run, push button to
stop a test run.
(Display part is same as procedure 1.)
5Push check button to cancel (release
from) the test run mode.
([TEST] disappears on the display and the status
returns to a normal.)
2, 4
3
1,5
11Maintenance
CAUTION
When connecting a return air duct to the unit, the cleaning method of the air filter differs according to the construction
of duct end. Ask a qualified installer or qualified service person.
<Daily maintenance>
CAUTION
• Do not start the air conditioner while leaving air filter removed.
• Push the filter reset button. ( indication will be turn off.)
▼Periodic maintenance
• For environmental conservation, it is strongly recommended that the indoor and outdoor units of the air
conditioner in use be cleaned and maintained regularly to ensure efficient operation of the air conditioner.
When the air conditioner is operated for a long time, periodic maintenance (once a year) is recommended.
Furthermore, regularly check the outdoor unit for rust and scratches, and remove them or apply rustproof
treatment, if necessary.
As a general rule, when an indoor unit is operated for 8 hours or more daily, clean the indoor unit and outdoor
unit at least once every 3 months. Ask a professional for this cleaning / maintenance work.
Such maintenance can extend the life of the product though it involves the owner’s expense.
Failure to clean the indoor and outdoor units regularly will result in poor performance, freezing, water leakage,
and even compressor failure.
• When a drain pump kit (sold separately) is installed.
If it is used in a place full of dust or oil mist, the pump will be clogged and proper drainage is disabled.
Clean the drain pump periodically. For how to clean the drain pump, contact the dealer.
▼Cleaning of air filter
1If is displayed on the remote controller, contact to
qualified installer or qualified service person.
2Take out the air filter.
• Push the extrusion of the air filter to inside and pull out it
to take out the air filter.
3Cleaning with water or vacuum cleaner
• If dirt is heavy, clean the air filter by tepid water with
neutral detergent or water.
• After cleaning with water, dry the air filter sufficiently in a
shade place.
4Mount the air filter.
5After cleaning, push .
display disappears.
3
1,2
33-EN 34-EN

–18–
EN
▼Inspection before maintenance
Following inspection must be carried out by a qualified installer or qualified service person.
▼Maintenance list
Part Inspection method
Heat exchanger Access from inspection opening and remove the access panel. Examine the heat exchanger if there
is any clogging or damages.
Fan motor Access from inspection opening and check if any abnormal noise can be heard.
Fan Access from inspection opening and remove the access panel. Examine the fan if there are any
waggles, damages or adhesive dust.
Filter Go to installed location and check if there are any stains or breaks on the filter.
Drain pan Accessfrom inspectionopening and remove theaccess panel. Check ifthereisany clogging or drain
water is polluted.
• The unit can be accessed from the access panel
shown in the figure.
Part Unit Check (visual / auditory) Maintenance
Heat exchanger Indoor / outdoor Dust / dirt clogging, scratches Wash the heat exchanger when it is
clogged.
Fan motor Indoor / outdoor Sound Take appropriate measures when
abnormal sound is generated.
Filter Indoor Dust / dirt, breakage • Wash the filter with water when it is
contaminated.
• Replace it when it is damaged.
Fan Indoor • Vibration, balance
• Dust / dirt, appearance • Replace the fan when vibration or
balance is terrible.
• Brush or wash the fan when it is
contaminated.
Air intake / discharge
grilles Indoor / outdoor Dust / dirt, scratches Fix or replace them when they are deformed or damaged.
Drain pan Indoor Dust / dirt clogging, drain
contamination Clean the drain pan and check the downward slope for smooth drainage.
Ornamental panel,
louvres Indoor Dust / dirt, scratches Wash them when they are contaminated or apply repair coating.
Exterior Outdoor Rust, peeling of insulator
Peeling / lift of coat Apply repair coating.
Electrical control box
Access panel
12Troubleshooting
Confirmation and check
When an error occurred in the air conditioner, an error
code and indoor UNIT No. appear on the display part
of the remote controller.
The error code is only displayed during the operation.
If the display disappears, operate the air conditioner
accordingtothefollowing“Confirmationoferrorlog”for
confirmation.
Confirmation of error log
Whenanerroroccurredon theair conditioner,theerror
log can be confirmed with the following procedure.
(The error history is stored in memory up to 4 errors.)
The log can be confirmed from both operating status
and stop status.
1When pushing and buttons at the
same time for 4 seconds or more, the
following display appears.
If is displayed, the mode enters in the error log
mode.
•[01: Order of error log] is displayed in CODE No.
• [Error code] is displayed in CHECK.
• [Indoor unit address in which an error occurred]
is displayed in Unit No.
2Every pushing of button used to set
temperature, the error log 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 error log of the
indoor unit will be deleted.
3After confirmation, push button to return
to the usual display.
Error code Indoor UNIT No. in
which an error occurred
3
2
1
35-EN 36-EN

–19–
Error codes and parts to be checked
Wiredremote
controller
display Main defective parts Judging
device Parts to be checked / error description Air
conditioner
status
Indication
E01 No header remote controller Remote
controller
Incorrect remote controller setting --- The header remote
controller has not been set (including two remote controllers). *
Remote controller
communication error No signal can be received from the indoor unit.
E02 Remote controller
transmission error Remote controller System interconnection wires, indoor P.C. board, remote
controller
--- No signal can be sent to the indoor unit. *
E03 Indoor unit-remote controller
regular communication error Indoor Remote controller, network adapter, indoor P.C. board --- No
data is received from the remote controller or network
adapter. Auto-reset
E04
Indoor unit-outdoor unit
serial communication error Indoor System interconnection wires, indoor P.C. board, outdoor
P.C. board --- Serial communication errorbetween indoor unit
and outdoor unit Auto-reset
IPDU-CDB communication
error
E08 Duplicated indoor addresses Indoor Indoor address setting error --- The same address as the self-
address was detected. Auto-reset
E09 Duplicated header remote
controllers Remote controller
Remote controller address setting error --- Two remote
controllers are set as header in the double-remote controller
control. *
(* The header indoor unit stops raising alarm and follower
indoor units continue to operate.)
E10 CPU-CPU communication
error Indoor Indoor P.C. board --- Communication error between main
MCU and motor microcomputer MCU Auto-reset
E18 Header indoor unit-indoor follower unit regular
communication error Indoor Indoor P.C. board --- Regular communication is not possible
between header and follower indoor units or between twin
header (main) and follower (sub) units. Auto-reset
E31 IPDU communication error Outdoor Communication error between IPDU and CDB Entire stop
F01 Indoor unit heat exchanger
sensor (TCJ) error Indoor Heat exchanger sensor (TCJ), indoor P.C. board --- Open-
circuit or short-circuit of the heat exchanger sensor (TCJ) was
detected. Auto-reset
F02 Indoor unit heat exchanger
sensor (TC) error Indoor Heat exchanger sensor (TC), indoor P.C. board --- Open-
circuit or short-circuit of the heat exchanger sensor (TC) was
detected. Auto-reset
F04 Outdoorunitdischargetemp.
sensor (TD) error Outdoor Outdoor temp. sensor (TD), outdoor P.C. board --- Open-
circuit or short-circuit of the discharge temp. sensor was
detected. Entire stop
F06 Outdoor unit temp. sensor
(TE / TS) error Outdoor Outdoor temp. sensors (TE / TS), outdoor P.C. board ---
Open-circuit or short-circuit of the heat exchanger temp.
sensor was detected. Entire stop
F07 TL sensor error Outdoor TL sensor may be displaced, disconnected or short-circuited. Entire stop
F08 Outdoor unit outside air
temp. sensor error Outdoor Outdoor temp. sensor (TO), outdoor P.C. board --- Open-
circuit or short-circuit of the outdoor air temp. sensor was
detected. Operation
continued
F10 Indoor unit room temp.
sensor (TA) error Indoor Room temp. sensor (TA), indoor P.C. board --- Open-circuit or
short-circuit of the room temp. sensor (TA) was detected. Auto-reset
F12 TS (1) sensor error Outdoor TS (1) sensor may be displaced, disconnected or short-
circuited. Entire stop
F13 Heat sink sensor error Outdoor Abnormal temperature was detected by the temp. sensor of
the IGBT heat sink. Entire stop
F15 Temp. sensor connection
error Outdoor Temp. sensor (TE / TS) may be connected incorrectly. Entire stop
F29 Indoor unit, other P.C. board
error Indoor Indoor P.C. board --- EEPROM error Auto-reset
F31 Outdoor unit P.C. board Outdoor Outdoor P.C. board ---- In the case of EEPROM error. Entire stop
H01 Outdoor unit compressor
breakdown Outdoor Current detect circuit, power voltage --- Minimum frequency
was reached in the current releasing control or short-circuit
current (Idc) after direct excitation was detected Entire stop
H02 Outdoor unit compressor
lock Outdoor Compressor circuit --- Compressor lock was detected. Entire stop
H03 Outdoor unit current detect
circuit error Outdoor Current detect circuit, outdoor unit P.C. board --- Abnormal
current was detected in AC-CT or a phase loss was detected. Entire stop
H04 Case thermostat operation
(1) Outdoor Malfunction of the case thermostat Entire stop
H06 Outdoor unit low-pressure
system error Outdoor Current, high-pressure switch circuit, outdoor P.C. board ---
Ps pressure sensor error was detected or low-pressure
protective operation was activated. Entire stop
L03 Duplicated header indoor
units Indoor Indoor address setting error --- There are two or more header
units in the group. Entire stop
L07 Group line in individual
indoor unit Indoor Indoor address setting error --- There is at least one group-
connected indoor unit among individual indoor units. Entire stop
L08 Indoor group address not set Indoor Indoor address setting error --- Indoor address group has not
been set. Entire stop
L09 Indoor power level not set Indoor Indoor power level has not been set. Entire stop
L10 Outdoor unit P.C. board Outdoor In the case of outdoor P.C. board jumper wire (for service)
setting error Entire stop
L20 LAN communication error Network adapter
central control
Address setting, central control remote controller, network
adapter --- Duplication of address in central control
communication Auto-reset
L29 Other outdoor unit error Outdoor
Other outdoor unit error Entire stop
1) Communication error between IPDU MCU and CDB MCU Entire stop
2) Abnormal temperature was detected by the heat sink temp.
sensor in IGBT.
L30 Abnormal external input into
indoor unit (interlock) Indoor External devices, outdoor unit P.C. board --- Abnormal stop due to incorrect external input into CN80 Entire stop
L31 Phase sequence error, etc. Outdoor Power supply phase sequence, outdoor unit P.C. board ---
Abnormal phase sequence of the 3-phase power supply
Operation
continued
(thermostat
OFF)
P01 Indoor unit fan error Indoor Indoor fan motor, indoor P.C. board --- Indoor AC fan error
(fan motor thermal relay activated) was detected. Entire stop
P03 Outdoorunitdischargetemp.
error Outdoor An error was detected in the discharge temp. releasing
control. Entire stop
P04 Outdoor unit high-pressure
system error Outdoor High-pressure switch --- The IOL was activated or an error
was detected in the high-pressure releasing control using the
TE. Entire stop
P05 Open phase detected Outdoor The power supply wire may be connected incorrectly. Check
open phase and voltages of the power supply. Entire stop
P07 Heat sink overheat Outdoor Abnormal temperature was detected by the temp. sensor of
the IGBT heat sink. Entire stop
P10 Indoor unit water overflow
detected Indoor Drain pipe, clogging of drainage, float switch circuit, indoor
P.C. board --- Drainage is out of order or the float switch was
activated. Entire stop
P15 Gas leakage detected Outdoor There may be gas leakage from the pipe or connecting part.
Check for gas leakage. Entire stop
P19 4-way valve error Outdoor
(Indoor) 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. Auto-reset
(Auto-reset)
P20 High-pressure protective
operation Outdoor High-pressure protection Entire stop
P22 Outdoor unit fan error Outdoor Outdoor unit fan motor, outdoor unit P.C. board --- An error (overcurrent, locking, etc.) was detected in the outdoor unit
fan drive circuit. Entire stop
P26 Outdoor unit inverter Idc
activated Outdoor IGBT, outdoor unit P.C. board, inverter wiring, compressor---
Short-circuit protection for compressor drive circuit devices
(G-Tr / IGBT) was activated. Entire stop
P29 Outdoor unit position error Outdoor Outdoor unit P.C. board, high-pressure switch --- Compressor
motor position error was detected. Entire stop
Wiredremote
controller
display Main defective parts Judging
device Parts to be checked / error description Air
conditioner
status
Indication
37-EN 38-EN