Page 1
AIR CONDITIONER (SPLIT TYPE)
Indoor Unit
Model name:
Concealed Duct High Static Pressure Type
RAV-SM2242DT-E
RAV-SM2802DT-E
Installation Manual
Installation Manual
Air conditioner (Split type) 1
English
Manuel d’installation
Climatiseur (Type split) 41
Français
Installationsanleitung
Klimagerät (Split-typ) 81
Deutsch
Manuale di installazione
Condizionatore d’aria (Tipo split)121
Italiano
Manual de instalación
Aire acondicionado (Tipo split) 161
Español
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Installation Manual
Original instruction
Contents
1 PRECAUTIONS FOR SAFETY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 ACCESSORY PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 SELECTION OF INSTALLATION PLACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5 FAN CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6 DRAIN PIPING WORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7 REFRIGERANT PIPING AND EVACUATING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8 ELECTRICAL CONNECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
9 APPLICABLE CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10 TEST RUN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
11 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
12 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
ADOPTION OF NEW REFRIGERANT
This Air Conditioner uses R410A an environmentally friendly refrigerant.
1-EN
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Installation Manual
EN
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.
Some of the details provided in these instructions differ from the Installation Manual supplied with your product, and the
instructions provided here take precedence.
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 must be installed, maintained, repaired and removed by a qualified installer or qualified service person.
When any of these jobs is to be done, ask a qualified installer or qualified service person to do 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 qualified installer is 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 remove the air
conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been 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 installer 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.
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, he or she
has been 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 service person who is allowed to do the electrical work involved in installation, repair,
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 service person who is allowed to do the refrigerant handling and piping work involved in
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 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 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.
2-EN
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Installation Manual
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 such normal protective gear, wear the 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.
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
3-EN
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EN
! 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 service valves before the operation, otherwise there 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.
4-EN
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Installation Manual
1 PRECAUTIONS FOR SAFETY
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.
• 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.
5-EN
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EN
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.
Test run
• Before operating the air conditioner after having completed the work, check that the electrical parts 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 M! or 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.”
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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.
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Installation Manual
EN
2 ACCESSORY PARTS
Part name Q’ty Shape Usage
Installation Manual
2 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)
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
8-EN
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Installation Manual
3 SELECTION 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.)
• 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 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 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
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EN
! 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 inlet panel.
2. Prepare the check port with carrying in port hole with the size of 600x600mm.
! 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 outlet chamber
Filter chamber
Air inlet chamber
Duct hose
Duct hose
Duct hose
<Installation example>
10-EN
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Installation Manual
4 INSTALLATION
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 inlet 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
(Local procure)
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)
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EN
! 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, to be local procure).
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 5mm)
• Check that four sides are horizontal using a level vial.
(Horizontal degree: Within 5mm)
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
(Blade type
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 inlet and air
outlet sides are within
5mm with each other.
Water pouring
Set the drain pipe
connecting port side within
5mm lower than opposite
side.
Front view
Side view
Vinyl hose
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Installation Manual
! 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 outlet port flange>
1130
1080
430
406
380
12 12
25
2525
25
65 250 250 65250250
<Air inlet port connecting flange>
10-Ø8 hole
13-EN
Page 15
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Concealed Duct High Static Pressure
Installation Manual
EN
! 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 outlet chamber
(with heat insulation)
Air outlet port
connecting flange
Indoor unit
High efficiency filter
inserting port
Pre filter
inserting port
Air inlet port
connecting flange
Air inlet
chamber
Filter
chamber
Electrical control
box
from ground floor
Duct hose
Check port or carrying
in port (600x600)
Check port cap
Ceiling
Air outlet port
Air outlet port
to ground floor
<Duct installation example (First floor)>
14-EN
Page 16
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Concealed Duct High Static Pressure
Installation Manual
5 FAN 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: 3600m³/h
High static pressure tap (50Hz)
Medium static pressure tap (50Hz)
Low static pressure tap (50Hz)
Current of fan motor (A)
External static pressure (Pa)
Medium static pressure tap (50Hz)
High static pressure tap (50Hz)
Low static pressure tap (50Hz)
15-EN
Page 17
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Concealed Duct High Static Pressure
Installation Manual
EN
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: 4200m³/h
High static pressure tap (50Hz)
Low static pressure tap (50Hz)
Current of fan motor (A)
External static pressure (Pa)
High static pressure tap (50Hz)
Medium static pressure tap (50Hz)
Low static pressure tap (50Hz)
Medium static pressure tap (50Hz)
16-EN
Page 18
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Concealed Duct High Static Pressure
Installation Manual
! 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 wires that 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 137Pa (14mmAq)] 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)
F1F2F3F
4
FM
F1F2F3F
4
FM
F1F2F3F
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
F1F2F3F
4
FM
F1F2F3F
4
FM
F1F2F3F
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
F1F2F3F
4
FM
F1F2F3F
4
FM
F1F2F3F
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
17-EN
Page 19
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Concealed Duct High Static Pressure
Installation Manual
EN
6 DRAIN 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 20m or less. When drain piping is too long, attach the support bracket at
intervals of 1.5m to 2m 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.
1.5 to 2 m
Descending slop of
1/50 to 1/100
Descending slop of
1/50 to 1/100
VP-30
As long as possible
Trap
Up-down bend
<Example for installation of the main piping (Incl. piping support)>
18-EN
Page 20
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Concealed Duct High Static Pressure
Installation Manual
! 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 Ø32mm)
Insulator
Foamed polyethylene foam, thickness: 10mm or more
19-EN
Page 21
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Concealed Duct High Static Pressure
Installation Manual
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 inlet 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.
Access plate
Pour into the drain pan with a hose or
other materials.
20-EN
Page 22
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Concealed Duct High Static Pressure
Installation Manual
! 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.
Heat insulation (Locally procured)
Thickness 10mm or more
Indoor unit
Drain pipe connecting port
21-EN
Page 23
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Concealed Duct High Static Pressure
Installation Manual
EN
7 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 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.
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 2.5 to 3m to clamp the refrigerant pipe. Otherwise,
abnormal sound may be generated.
CAUTION
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
!
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.
However, the conventional tools can
be used by adjusting projection
margin of the copper pipe.
▼ Projection margin in flaring: B (Unit: mm)
Rigid (Clutch type)
▼ Flaring dia. meter size: A (Unit: mm)
* 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.
Pipe size
Gas side 28.6 mm
Liquid side 12.7 mm
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
B
A
22-EN
Page 24
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Concealed Duct High Static Pressure
Installation Manual
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.
For details, follow to the Installation Manual attached to 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
Use a wrench to secure. 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.
23-EN
Page 25
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Concealed Duct High Static Pressure
Installation Manual
EN
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 4mm-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).
Indoor unit
Union
Heat insulation
(Accessory)
Flare nut
Heat insulator of
the pipe
24-EN
Page 26
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Concealed Duct High Static Pressure
Installation Manual
8 ELECTRICAL 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 inter-connecting wires when
peeling them.
• Use the power cord and Inter-connecting 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 220–240V 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
power line and between the indoor and outdoor units
and between the indoor units and remote controller.
The wires indicated by the dash lines are provided at
the installation place.
2. Insulate the unsheathed redundant cords (conductors)
with electrical insulation tape.
Process them so that they do not touch any electrical or
metal parts.
! Wiring diagram
! Power and Wiring
Specification
*Number of wire x wire size
A B
Indoor fan Power supply
220-240V~, 50 Hz
Maximum running
current
15A
Fuse rating
25A
Indoor fan power supply
wire*
3 x 2.5mm2 or more
(H07 RN-F or 60245 IEC 66)
System interconnecting
wires*
4 x 1.5mm2 or 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
220-240V~, 50 Hz
Outdoor Input power
380-415V 3N~, 50 Hz
Circuit breaker
(Leakage breaker)
Circuit breaker
(Leakage breaker)
Wired remote
controller
25-EN
Page 27
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Concealed Duct High Static Pressure
Installation Manual
EN
! 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. 100mm) 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 interconnecting
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
26-EN
Page 28
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Concealed Duct High Static Pressure
Installation Manual
! Remote Controller Wiring
• Strip off approx. 9mm the wire to be connected.
• Non polarity, 2 core wire is used for wiring of the remote
controller. (0.5mm² to 2.0mm² wires)
Wiring diagram
Group control
R (L)
10
40
10
30
S (N)
Indoor fan power supply wire
(Unit: mm)
1030
1040
321
System interconnecting wire
A
B
A
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
27-EN
Page 29
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Concealed Duct High Static Pressure
Installation Manual
EN
9 APPLICABLE 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 was
shipped from factory.
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.)
Procedure 1
Push button and TEMP. 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 controller is accepted for a
while after button is pushed.)
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. You can confirm the indoor
unit for which you want to change settings.
Procedure 3
Using TEMP. / buttons, specify CODE No. [ ].
Procedure 4
Using 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
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.
* The settings cannot be changed using the wireless
remote controller, sub remote controller, or remotecontroller-less system (for central remote controller
only). 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.)
28-EN
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Concealed Duct High Static Pressure
Installation Manual
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
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
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:
The fan of the selected unit runs.
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%.
4. Determine the setting by pushing button.
5. Push button to complete the setting.
SET DATA Filter sign term
0000
None
0001
150H
0002
2500H
(Factory default)
0003
5000H
0004
10000H
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
UNIT No.
1-1
UNIT No.
1-2
UNIT No.
1-3
UNIT No.
1-4
Setting of power level in
power saving mode
29-EN
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Concealed Duct High Static Pressure
Installation Manual
EN
! 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.
1. Push and buttons simultaneously for at least
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
(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.
4. Push
button to return to the normal display.
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)
1 3
4
2
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
(x100h)
30-EN
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Concealed Duct High Static Pressure
Installation Manual
! 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
• For wiring procedure and wiring method of the individual line (Identical refrigerant line) 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.
• When the power supply has been 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 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 unit
Indoor unit
Indoor unitIndoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
31-EN
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Concealed Duct High Static Pressure
Installation Manual
EN
Procedure example 1
Manual address setup procedure
While the operation stops, change the setup.
(Be sure to stop the operation of the unit.)
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 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.)
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 of the selected
indoor unit operate.
Procedure 3
1. Using TEMP. / buttons, specify CODE 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.
Procedure 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.
Procedure 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.
32-EN
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Concealed Duct High Static Pressure
Installation Manual
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. / 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
2 is repeated.)
Procedure 7
After 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.)
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 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 CODE No. 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.)
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 of the selected indoor unit operate.
(For a group control, No. of the firstly displayed indoor unit
becomes the header unit.)
Procedure 3
After 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.)
Indoor UNIT No. before setup change is displayed.
2
1,3
1
(* Display changes according to
the model No. of indoor unit.)
33-EN
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Concealed Duct High Static Pressure
Installation Manual
EN
! 8°C Operation
Pre-heating operation can be set for cold regions where room
temperature drops to below zero.
Procedure 1
Push 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].
• When the CODE No. 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.)
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
of the selected indoor unit operate.
Procedure 3
Using TEMP. / buttons, specify CODE No. [d1].
Procedure 4
Using TIME / buttons, select SET DATA [0001].
Procedure 5
Push button.
In this time, the setup finishes when the display changes from
flashing to lighting.
Procedure 6
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.)
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.)
34-EN
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Concealed Duct High Static Pressure
Installation Manual
10TEST RUN
! Before test run
• Before turning on the power supply, carry out the following
procedure.
1) Using 500V-megger, check that resistance of 1M!
or more exists between the terminal block 1 to 3 and
the earth (grounding).
If resistance of less than 1M! 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 powerON 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.
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.
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.)
2, 4
3
1,5
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Concealed Duct High Static Pressure
Installation Manual
EN
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>
Cleaning of air filter
1. If is displayed on the remote controller, contact to qualified
installer or qualified service person.
2. Take out the air filter.
• Push the extrusion of the air filter to inside and pull out it to take
out the air filter.
3. Cleaning 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.
4. Mount the air filter.
5. After cleaning, push .
display disappears.
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.
3
1,2
36-EN
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Concealed Duct High Static Pressure
Installation Manual
Maintenance List
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 inlet/outlet 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.
37-EN
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Concealed Duct High Static Pressure
Installation Manual
EN
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
according to the following “Confirmation of error log” for
confirmation.
! Confirmation of error log
When an error occurred on the air conditioner, the error 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.
Procedure 1
When 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..
Procedure 2
Every 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.
Procedure 3
After confirmation, push button to return to the usual
display.
Error code Indoor UNIT No. in
which an error occurred
3
2
1
38-EN
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Concealed Duct High Static Pressure
Installation Manual
! Error codes and parts to be checked
Wired remote
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 interconnecting 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 interconnecting wires, indoor P.C. board, outdoor P.C. board -
-- Serial communication error between 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
Outdoor unit discharge temp.
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 shortcircuit 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
39-EN
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Concealed Duct High Static Pressure
Installation Manual
EN
: The air conditioner automatically enters the auto-address setting mode.
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
Outdoor unit discharge temp.
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 --- Shortcircuit 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
P31 Other indoor unit error Indoor
Another indoor unit in the group is raising an alarm. Entire stop
E03/L07/L03/L08 alarm check locations and error description Auto-reset
Wired remote
controller
display
Main defective parts Judging device Parts to be checked / error description
Air conditioner
status
Indication
40-EN
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