Toshiba MMU-AP0092H User manual

AIR CONDITIONER (SPLIT TYPE)
Installation Manual
Indoor Unit
Model name:
4-way Cassette Type
MMU-AP0092H
MMU-AP0122H
MMU-AP0152H
MMU-AP0182H
MMU-AP0242H
MMU-AP0272H
MMU-AP0302H
MMU-AP0362H
MMU-AP0482H
MMU-AP0562H
For commercial use
Ticari kullanım için
Kurulum kılavuzu 26
Türkçe
Installation Manual 1
English
+00EH99891001_01EN.book Page 1 Monday, May 14, 2012 11:31 AM

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Original instruction
Contents
1 Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2 Accessory parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Selection of installation place. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
5 Drain piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
6 Refrigerant piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
7 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8 Applicable controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
9 Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
10 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
11 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
12 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Please read this Installation Manual carefully before installing the Air Conditioner.
• This Manual describes the installation method of the indoor unit.
• For installation of the outdoor unit, follow the Installation Manual attached to the outdoor unit.
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, and ensure that you understand
them.
After completing the installation work, hand over this Installation Manual as well as the Owner’s Manual provided
with the outdoor unit to the user, and ask the user to keep them in a safe place for future reference.
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.
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
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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.
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 through the Installation Manual carefully, and follow its instructions
to install the air conditioner.
• Only a qualified installer or service person is allowed to do installation work. Inappropriate installation may result in
water leakage, electric shock or fire.
• 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 or qualified service person 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, 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 or qualified service person 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 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 work is performed 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.
• Before 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.
• Before 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. While carrying out the work,
wear a helmet for protection from falling objects.
• The refrigerant used by this air conditioner is the R410A.
• The air conditioner must be transported in stable condition. If any part of the product is broken, contact the dealer.
• When the air conditioner must be transported by hand, carry it by two or more people.
• 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
• When the air conditioner is installed in a small room, provide appropriate measures to ensure that the concentration
of refrigerant leakage occur in the room does not exceed the critical level.
• Do not install in a location where flammable gas leaks are possible. If the gas leak and accumulate around the unit,
it may ignite and cause a fire.
• To transport the air conditioner, wear shoes with additional protective toe caps.
• To transport 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.
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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 securely in a location where the base can sustain the weight adequately. 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 or other trouble.
• Carry out the specified installation work to guard against the possibility of high winds and earthquake. If the air
conditioner is not installed appropriately, a unit may topple over or fall down, causing an accident.
• If refrigerant gas has leaked during the installation work, ventilate the room immediately. If the leaked refrigerant gas
comes in contact with fire, noxious gas may generate.
• Use forklift to carry in the air conditioner units and use winch or hoist at installation of them.
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.
Electrical wiring
• Only a qualified installer or qualified service person 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.
• To connect the electrical wires, repair the electrical parts or undertake 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.
• Connect earth wire. (Grounding work)
Incomplete grounding causes an electric shock.
• Do not connect earth wires to gas pipes, water pipes, and lightning conductor or telephone earth wires.
• After completing the repair or relocation work, check that the earth 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 the power wire must not be extended. Connection trouble in the places where the wire 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 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.
• If there is any kind of trouble (such as an error display has appeared, smell of burning, abnormal sounds, 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 or other trouble.
• After the work has finished, use an insulation tester set (500 V Megger) to check the resistance is 1 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 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 to have the repairs done. Do not set the circuit breaker to the ON position until the
repairs are completed.
Relocation
• Only a qualified installer or qualified service person 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 or
other gas 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.
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, do not let water, dust, former refrigerant, or refrigerating oil enter the refrigerating cycle
during installation work.
• 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 (all types can be used) must be used for the power supply line of this conditioner.
(*1) Refer to the “Definition of Qualified Installer or Qualified Service Person.”
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EN
2Accessory parts
Accessory parts
Separate sold parts
• The Ceiling panel and remote controller are sold separately. For the installation of these products, follow the
Installation Manuals supplied with them.
• The wireless type remote controller is designed to be installed by attaching a wireless remote controller kit (sold
separately) to the standard panel. (The wireless remote controller kit consists of a wireless remote controller and
adjust corner caps with a receiver section.)
Part name Q’ty Shape Usage
Installation Manual 1 This manual (Hand over to customers)
Heat insulating pipe 2 For heat insulation of pipe connecting section
Installation pattern 1 —For confirmation of ceiling opening and indoor unit position
Installation gauge – – For positioning of ceiling position
Washer 4 For hanging-down unit
Eccentric washer 4 For hanging-down unit
Hose band 1 For connecting drain pipe
Flexible hose 1 For adjusting center of drain pipe
Heat insulator 1 For heat insulation of drain connecting section
Heat insulator 1 For sealing of wire connecting port
3Selection of installation place
WARNING
•Install the air conditioner at enough strong place to withstand the weight of the unit.
If the strength is not enough, the unit may fall down resulting in injury.
•Install the air conditioner at a height 2.5 m or more from the floor.
If you insert your hands or others directly into the unit while the air conditioner operates, it is dangerous because you
may contact with revolving fan or active electricity.
CAUTION
•Do not install the air conditioner in a location subject to a risk of exposure to a combustible gas.
If a combustible gas leaks and stays around the unit, a fire may occur.
Upon approval of the customer, install the air conditioner in a place that satisfies the
following conditions
• Place where the unit can be installed horizontally.
• Place where a sufficient servicing space can be ensured for safety maintenance and check.
• Place where drained water will not cause any problem.
Avoid installing in the following places
• Place exposed to air with high salt content (seaside area), or place exposed to large quantities of sulfide gas (hot
spring).
(Should the unit be used in these places, special protective measures are needed.)
• A restaurant kitchen where a lot of oil is used or place near machines in a factory (Oil adhering to the heat
exchanger and resin part (turbo fan) in the indoor unit may reduce the performance, generate mist or dew drop,
or deform or damage resin parts.)
• 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 neighbor house. (Outdoor unit)
• Place where noise of the outdoor unit is easily transmitted.
(When install the outdoor unit on the boundary with the neighbor, pay due attention to the level of noise.)
• Place with poor ventilation. (Before air ducting work, check whether value of 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 near a door or window exposed to humid outside air (Dew droping may form.).
• Place where special spray is used frequently.
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Installation space
Secure the specified space in the figure for installation and servicing.
Selection of installation place
In case of continued operation of the indoor unit under high-humidity conditions as described below, dew may
condense and water may drop.
Especially, high-humidity atmosphere (dew point temperature : 23 °C or more) may generate dew inside the ceiling.
1. Unit is installed inside the ceiling with slated roof.
2. Unit is installed at a location using inside of the ceiling as fresh air take-in path.
3. Kitchen
◆Advice
• Set a service check opening panel at right side of the unit (size: 450 × 450 mm or more) for piping, maintenance,
and servicing.
• If installing a unit at such place, put insulating material (glass wool, etc.) additionally on all the positions of the
indoor unit which come to contact with high-humidity atmosphere.
REQUIREMENT
When the humidity inside the ceiling seems to be higher than 80 %, attach a heat insulator to the side (top)
surface of the indoor unit. (Use a heat insulator that is 10 mm or more thick.)
Ceiling height
When the height of the ceiling exceeds the distance of the item Standard / 4-way in Table on the next page, the
hot air is difficult to reach the floor.
Therefore, it is necessary to change the setup value of the high ceiling switch or discharge direction.
The high-ceiling setting is also necessary when installing separately sold filters.
Model MMU- A mm
AP009 Type to AP030 Type 271 or more
AP036 Type to AP056 Type 334 or more
238
200
(450
x
450)
(450
x
450)
1000 or more
Obstacle
15 or more
1000
or more
A
unit: mm
When incorporating
flesh-air intake box
▼When incorporating flesh-air intake box
(sold separately)
Provide an inspection opening at the
outside-air intake box side.
Check port
Check port
REQUIREMENT
• When using the air conditioner with 2-way / 3-way discharge system, a strong wind blows directly if the ceiling height
is lower than the standard.
Therefore, change the setting switch according to height of the ceiling.
• When using the high ceiling (1) or (3) with 4-way discharge system, the draft is apt to be felt due to drop of the
discharge temperature.
• AP009 Type and AP012 Type air conditioners cannot be installed on a high ceiling.
▼Height list of ceiling possible to be installed
(Unit: m)
The lighting time of the filter sign (notification of filter cleaning) on the remote controller can be changed according
to installation conditions.
When it is difficult to obtain satisfactory heating due to location place of the indoor unit or the structure of the room,
the detection temperature of heating can be raised.
Discharge direction
As shown in the figure below, air discharge directions can be selected according to the shape of the room and the
location of the indoor unit installation.
Use a shielding plate kit (sold separately) to change discharge directions.
Discharge directions are limited. Follow the Installation Manual supplied with the shielding plate kit.
Model MMU- AP009 to AP012 AP015 to AP018 AP024 to AP030 AP036 to AP056 Setup of high
ceiling
Discharge direction 4-way 3-way 2-way 4-way 3-way 2-way 4-way 3-way 2-way 4-way 3-way 2-way SET DATA
Standard (At shipment) 2.7 2.8 3.0 2.8 3.2 3.5 3.0 3.3 3.6 3.9 4.2 4.5 0000
High ceiling (1) — — — 3.2 3.5 3.8 3.3 3.5 3.8 4.2 4.4 4.6 0001
High ceiling (3) — — — 3.5 3.8 — 3.6 3.8 — 4.5 4.6 — 0003
3 directions 2 directions
Shielding plate
(Sold separately)
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EN
4Installation
REQUIREMENT
Strictly comply with the following rules to prevent damage of the indoor units and human injury.
• Do not put a heavy article on the indoor unit. (Even units are packaged)
• Carry in the indoor unit as it is packaged if possible. If carrying in the indoor unit unpacked by necessity, be sure to
use buffering cloth, etc. to not damage the unit.
• To move the indoor unit, hold the hooking metals (4 positions) only.
Do not apply force to the other parts (refrigerant pipe, drain pan, foamed parts, or resin parts, etc.).
• Carry the package by two or more persons, and do not bundle it with plastic band at positions other than specified.
External view (Unit:mm)
(mm)
Model MMU- A B C D Model MMU- A B C D
AP009 to AP012 256 Ø6.4 Ø9.5 120 AP024 to AP030 256 Ø9.5 Ø15.9 120
AP015 to AP018 256 Ø6.4 Ø12.7 120 AP036 to AP056 319 Ø9.5 Ø15.9 183
Ceiling bottom
surface Knockout square hole
for divide duct
For Ø150
Knockout square
hole for divide duct
For Ø150
840 Unit external dimension
Ceiling bottom surface
Electrical
control box
Refrigerant pipe
connecting port
(Liquid) B
Refrigerant pipe
connecting port
(Gas) C
Take-in port
of wires
Ceiling
bottom
surface
Drain pipe
connecting
port
Knockout square hole
for divide duct
For Ø150
Hanging bolt M10 or Ø3/8
(Locally procured)
Knockout square hole for divide duct
For Ø150
690 ± 20 Hanging bolt pitch
860 to 910 Ceiling opening dimension
950 Panel external dimension
Knockout square hole for humidifier
Ceiling panel (sold separately)
Ceiling bottom surface
Z view
Knockout for
simple OA
For Ø100
Ceilingbottom
surface
860 to 910 Ceiling opening dimension
780 Hanging bolt pitch
950 Panel external dimension
Opening a ceiling and
installation of hanging bolts
• Consider the piping / wiring after the unit is hung
when determining the location of the indoor unit
installation and orientation.
• After the location of the indoor unit installation has
been determined, open the ceiling and install
hanging bolts.
• The dimensions of the ceiling opening and hanging
bolt pitches are given in the outline drawing and the
attached installation pattern.
• When a ceiling already exists, lay the drain pipe,
refrigerant pipe, indoor unit / outdoor unit connection
wires, and remote controller wires to their connection
locations before hanging the indoor unit.
Procure hanging bolts and nuts for installing the indoor
unit (these are not supplied).
◆Using the installation pattern
(accessory)
The installation pattern is provided inside the
packaging cap.
<For existing ceiling>
Use the installation pattern positioning a ceiling
opening and hanging bolts.
<For new ceiling>
Use the installation pattern to position the ceiling
opening when hanging a ceiling.
• After the hanging bolts have been installed, install
the indoor unit.
• Hook the four holes in the installation pattern to the
panel fixing screws of the indoor unit.
• When hanging a ceiling, open the ceiling along the
outside dimensions of the installation pattern.
◆Treatment of ceiling
The ceiling differs according to structure of building.
For details, consult your constructor or interior finish
contractor.
In the process after the ceiling board has been
removed, it is important to reinforce ceiling foundation
(frame) and to keep horizontal level of installed ceiling
correctly in order to prevent vibration of ceiling board.
1. Cut and remove the ceiling foundation.
2. Reinforce the cut surface of ceiling foundation, and
add ceiling foundation for fixing the end of ceiling
board.
◆Installation of hanging bolt
Use 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.
Hanging bolt M10 or W3/8 4 pieces
Nut M10 or W3/8 12 pieces
Indoor unit
Panel fixing
screw
Installation pattern (Accessory)
Hole
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
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◆Installation of ceiling opening and
hanging bolt
• Attach a nut (M10 or W3/8: not supplied) and the
Ø34 washer (supplied) to each hanging bolt.
• Insert a washer on both sides of the T groove of the
hanging bracket of the indoor unit, and hang the
indoor unit.
• Check that the four sides of the indoor unit are level
using a level vial (levelness: 5 mm or less).
• Detach the installation gauge (accessory) from the
installation pattern.
• Using the installation gauge, check and adjust the
positional relation between the indoor unit and the
ceiling opening (1) (10 to 35 mm: 4 sides) and the
hanging-up height (2) ( mm: 4 corners).
(How to use the installation gauge is printed on the
gauge.)
REQUIREMENT
Before installation of the indoor unit, be sure to remove
the cushion for transportation between the fan and the
bell mouth. Running the unit without removing the
cushion may damage the fan motor.
Hanging bolt
Level vial
Hanging bracket
12 +5
0
Washer (Accessory)
To prevent the bolt
from falling off (for
safety), be sure to set
it just under the
hanging bracket as
shown in the figure.
Eccentric washer
(Accessory)
Nut (M10 or W3/8)
Hanging bolt
(M10 or W3/8)
Nut (M10 or W3/8)
* Procure hanging bolts
and nuts locally.
* Install with the marking
“UP” facing up.
Indoor unit
Level vial (levelness: 5 mm or less)
Hanging bolt
Hanging
bracket
Installation gauge
(1) 10 to 35 mm
Ceiling
board
(2) mm
12
+5
0
Indoor unit
Installation
gauge (1) 10 to
35 mm
(2) mm
12
+5
0
Ceiling board
Be sure to remove the cushion for
transportation between the fan and the
bell mouth.
Installation of ceiling panel
(Sold separately)
Install the ceiling panel according to Installation
Manual attached with it after piping / wiring work has
completed.
Check that installation of indoor unit and ceiling
opening part is correct, and then install it.
REQUIREMENT
• Joint the connecting sections of ceiling panel, ceiling
surface, ceiling panel and indoor unit closely.
Any gap between them will cause air leakage and the
generate condensation or water leakage.
• Remove the adjust corner caps at the four corners of
the ceiling panel, and then install the ceiling panel
onto the indoor unit.
• Make sure that the claws of the four adjust corner caps
are securely fit.
* Improper fitting of the claws may cause water
leakage.
Installation of remote
controller (Sold separately)
For installation of the wired remote controller, follow the
Installation Manual attached with the remote controller.
• Pull out the remote controller cord together with the
refrigerant pipe or drain pipe.
Be sure to pass the remote controller cord through
upper side of the refrigerant pipe and drain pipe.
• Do not leave the remote controller at a place
exposed to the direct sunlight and near a stove.
Wireless type
The sensor of indoor unit with wireless remote
controller can receive a signal by distance within
approx. 8 m. Based upon it, determine a place where
the remote controller is operated and the installation
place.
• Operate the remote controller, confirm that the
indoor unit receives a signal surely, and then install
it.
• Keep 1 m or more from the devices such as
television, stereo, etc.
(Disturbance of image or noise may generate.)
• To prevent a malfunction, select a place where is not
influenced by a fluorescent light or direct sunlight.
• Two or more (Up to 6 units) indoor units with wireless
type remote controller can be installed in the same
room.
Within8m
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EN
5Drain piping
CAUTION
Following the Installation Manual, perform the drain
piping work so that water is properly drained, and
apply a heat insulation so as not to cause a dew
droping.
Inappropriate piping work may result in water
leakage in the room and wet of furniture.
Piping / Heat insulating
material
Require the following materials for piping and heat
insulating at site.
Flexible hose
Use the attached flexible hose to adjust center
discrepancy of the hard vinyl chloride pipe or to adjust
the angle.
• Do not use the flexible hose as stretched, or do not
deform it more extent than that in the following figure.
• Be sure to fix the soft end of the flexible hose with the
attached hose band.
• Use the flexible hose on a horizontal level.
REQUIREMENT
• Be sure to perform heat insulation of the drain pipes of
the indoor unit.
• Never forget to perform heat insulation of the
connecting part with the indoor unit.
An incomplete heat insulation causes dew droping.
• Set the drain pipe with downward slope (1/100 or
more), and do not make swelling or trap on the piping.
It may cause an abnormal sound.
• For length of the traversing drain pipe, restrict to 20 m
or less.
In case of a long pipe, provide support brackets with
interval of 1.5 to 2 m in order to prevent waving.
• Set the collective piping as shown in the below figure.
• Be sure not to apply force to the connecting part of the
drain pipe.
• The hard vinyl-chloride pipe cannot be directly
connected to the drain pipe connecting port of the
indoor unit.
For connection with the drain pipe connecting port, be
sure to use / fix the attached flexible hose with the
hose band, otherwise a damage or water leak is
caused on the drain pipe connecting port.
Piping Hard vinyl chloride pipe VP25
(Outer dia. : Ø32 mm)
Heat insulator Foam polyethylene :
Thickness 10 mm or more
OK NO GOOD
max
45°
max
45°
Riser (Trap)
90° Bend
Support
bracket
1/100 or more
downward
Heat insulator
1.5 m to 2 m
Arched
shape
Trap
NO
GOOD
VP25
As long as possible (10 cm)
Downward slope
1/100 or more
VP30 or more
VP25 VP25
Drain pipe
connectingport
(Transparent)
Adhesive inhibited :
Use the attached flexible hose and hose band for
connecting the drain hose to the clear drain socket.
If applying the adhesive, socket will be damaged and
cause water leakage.
Align the attached hose band to
the end of hose, set the
tightening position upward, and
then tighten it.
Flexible hose
(Accessory)
Socket for VP25 vinyl chloride pipe
(Locally procured)
Drain pipe
connecting port
(Hard socket)
VP25 vinyl chloride pipe
(Locally procured)
Attached hose
band
Attached flexible hose
Soft socket
Hard socket
Socket for VP25
(Locally procured)
VP25 vinyl chloride
pipe (Locally
procured)
Indoor unit
Indoor unit
Connecting drain pipe
• Connect a hard socket (locally procured) to the hard
socket of the attached supplied flexible hose.
• Connect a drain pipe (locally procured) to the
connected hard socket.
REQUIREMENT
• Connect hard vinyl chloride pipes securely using an
adhesive for vinyl chloride to avoid water leakage.
• It takes some time until the adhesive is dried and
hardened (refer to the manual of the adhesive). Do not
apply stress to the joint with the drain pipe during this
time period.
Drain up
When a down-gradient cannot be secured for the
drainpipe, drain-up piping is possible.
• The height of the drain pipe must be 850 mm or less
from the bottom of the ceiling.
• Take the drain pipe out of the drain pipe joint with the
indoor unit in 300 mm or less, and bend up the pipe
vertically.
• Immediately after the pipe is bent up vertically, lay
the pipe making a down-gradient.
• Set downward grading immediately after raising up
vertically.
Check the draining
In the test run, check that water drain is properly
performed and water does not leak from the connecting
part of the pipes.
Be sure to check draining also when installed in
heating period.
Using a pitcher or hose, pour water (1500 to 2000 cc)
into the discharge port before installation of the ceiling
panel.
Pour water gradually so that water does not spread on
the motor of the drain pump.
CAUTION
Pour water gently so that it does not spread around
inside the indoor unit, which may cause a malfunction.
• After the electric work has finished, pour water
during Cool mode operation.
• If the electric work has not yet finished, pull out the
float switch connector (CN34 : Red) from the
electrical control box, and check draining by plugging
the single phase 220-240 V power to the terminal
blocks R(L) and S(N).
If doing so, the drain pump motor operates.
(Never apply 220-240 V to , , or ,
otherwise a trouble of P.C. board occurs.)
Rising up 661 mm or less
Underside of ceiling
Indoor unit
300 mm
or less
Rising up 850 mm or less
S
R
Heat
exchanger
Drain pan
Float switch
connector (3P)
(CN34: red)
Power
supply
wiring
Insert the hose end between the
heat exchanger and the drain pan,
and then bend the hose downward.
Tool for
pouring
water
Bottle
Water (1500 cc to 2000 cc)
A
B
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–9–
• Test water drain while checking the operation sound
of the drain pump motor.
(If the operation sound changes from continuous
sound to intermittent sound, water is normally
drained.)
After the check, the drain pump motor runs,
connecting the float switch connector.
(In case of check by pulling out the float switch
connector, be sure to return the connector to the
original position.)
Heat insulating
• As shown in the figure, cover the flexible hose and
hose band with the attached heat insulator up to the
bottom of the indoor unit without gap.
• Cover the drain pipe seamlessly with a heat insulator
locally procured so that it overlaps with the attached
heat insulator of the drain connecting section.
* Direct the slits and seams of the heat insulator
upward to avoid water leakage.
S(N)
R(L)
Pull out connector CN34 (Red)
from P.C. board.
CN34
(RED)
Black
Black
Red
White
Single phase
220-240 V
Power
terminals
Wrap the attached heat insulator seamlessly from
the surface of the indoor unit.
Heat insulator of the
drain connecting
section (Accessory)
Indoor unit
Heat insulator
(Locally procured)
6Refrigerant piping
Refrigerant piping
1. Use copper pipe with 0.8 mm or more thickness.
(In case pipe size is Ø15.9, with 1.0 mm or more.)
2. 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 3 m 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
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.
Model MMU- AP009 to
AP012
AP015
to
AP018
AP024
to
AP056
Pipe size
(Dia. : mm)
Gas
side 9.5 12.7 15.9
Liquid
side 6.4 6.4 9.5
Outer dia. of
copper pipe
R410A tool used Conventional tool
used
R410A R410A
6.4, 9.5 0 to 0.5 1.0 to 1.5
12.7, 15.9
Outer dia. of copper pipe R410A
6.4 9.1
9.5 13.2
12.7 16.6
15.9 19.7
B
A0
-0.4
+
A
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EN
◆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 centers of the connecting pipes and tighten
the flare nut as far as possible with your fingers. Then
tighten the nut with a spanner and torque wrench as
shown in the figure.
REQUIREMENT
Tightening with an excessive torque may crack the nut
depending on installation conditions.
Tighten the nut within the specified tightening torque.
◆Piping with outdoor unit
Shape of valve differs according to the outdoor unit.
For details of installation, refer to the Installation
Manual of the outdoor unit.
Airtight test / Air purge, etc.
For airtight test, air purge, addition of refrigerant, and
gas leak check, refer to the Installation Manual
attached to the outdoor unit.
REQUIREMENT
Do not supply power to the indoor unit until the airtight
test and vacuuming are completed. (If the indoor unit is
powered on, the pulse motor valve is fully closed, which
extends the time for vacuuming.)
◆Open the valve fully
Open the valve of the outdoor unit fully.
For details, refer to the Installation Manual attached to
the outdoor unit.
◆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).
(Unit : N•m)
Outer dia. of copper pipe Tightening torque
6.4 mm (dia.) 14 to 18 (1.4 to 1.8 kgf•m)
9.5 mm (dia.) 33 to 42 (3.3 to 4.2 kgf•m)
12.7 mm (dia.) 50 to 62 (5.0 to 6.2 kgf•m)
15.9 mm (dia.) 63 to 77 (6.3 to 7.7 kgf•m)
Work using double spanner
Indoor unit
Union
Heat insulation
pipe
(Accessory)
Flare nut
Heat insulator
of the pipe
Wrap the pipe with the attached heat insulator
without any gap between the indoor unit.
The seam must be faced upward
(ceiling side).
Banding band
(Locally
procured)
7Electrical 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 inter connection
wires when peeling them.
• Use the power cord and system inter connection wire
of specified thickness, type, and protective devices
required.
• Never connect 220-240 V power to the terminal blocks
( , , , , etc.) for control wiring.
(Otherwise, the system will fail.)
REQUIREMENT
• For power supply wiring, strictly conform to the Local
Regulation in each country.
• For wiring of power supply of the outdoor units, follow
the Installation Manual of each outdoor unit.
• 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.
Power supply wire and
communication wires
specifications
Power supply wire and communication wires are locally
procured.
For the power supply specifications, follow to the table
below. If capacity is little, it is dangerous because
overheat or seizure may be caused.
For specifications of the power capacity of the outdoor
unit and the power supply wires, refer to the Installation
Manual attached to the outdoor unit.
◆Indoor unit power supply
• For the power supply of the indoor unit, prepare the
exclusive power supply separated from that of the
outdoor unit.
• Arrange the power supply, earth leakage breaker,
and main switch of the indoor unit connected to the
same outdoor unit so that they are commonly used.
• Power supply wire specification : Cable 3-core
2.5 mm², in conformity with Design 60245 IEC 57.
▼Power supply
◆Control wiring, Central controller
wiring
• 2-core with polarity wires are used for the Control
wiring between indoor unit and outdoor unit and
Central controller wiring.
• To prevent noise trouble, use 2-core shield wire.
• The length of the communication line means the total
length of the inter-unit wire length between indoor
and outdoor units added with the central control
system wire length.
A
B
Power supply 220-240 V ~, 50 Hz
220 V ~, 60 Hz
Power supply switch / Earth leakage breaker or power
supply wiring / fuse rating for indoor units should be
selected by the accumulated total current values of the
indoor units.
Power supply wiring Below 50 m 2.5 mm²
19-EN 20-EN
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–11–
▼Communication line
◆Remote controller wiring
2-core with non-polarity wire is used for wiring of the remote controller wiring and group remote controllers wiring.
CAUTION
The remote controller wire (Communication line) and AC220-240 V wires cannot be parallel to contact each other and
cannot be stored in the same conduits. If doing so, a trouble may be caused on the control system due to noise, etc.
Control wiring between indoor units, and outdoor unit
(2-core shield wire) Wire size (Up to 1000 m) 1.25 mm² (Up to 2000 m) 2.0 mm²
Central control line wiring (2-core shield wire) Wire size (Up to 1000 m) 1.25 mm²
(Up to 2000 m) 2.0 mm²
Remote controller wiring, remote controller inter-unit wiring Wire size: 0.5 mm² to 2.0 mm²
Total wire length of remote controller wiring and remote controller
inter-unit wiring = L + L1 + L2 + … Ln
In case of wired type only Up to 500 m
In case of wireless type included Up to 400 m
Total wire length of remote controller inter-unit wiring = L1 + L2 + … Ln Up to 200 m
L1
L
L2 Ln
Indoor unit
Remote controller inter-unit wiring
Indoor unit Indoor unit Indoor unit
Remote
controller
(Max. 8 units)
Remote
controller
wiring
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 wiring connection port 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)
• Make a loop on the wire for margin of the length so that the electrical control box can be taken out during servicing.
1. Remove the cover of the electrical control box by taking off the mounting screws (2 positions) and pushing the
hooking section. (The cover of the electrical control box remains hanged to the hinge.)
2. Connect the power supply wire and remote controller wire to the terminal block of the electrical control box.
3. Tighten the screws of the terminal block, and fix the wires with cord clamp attached to the electrical control box. (Do
not apply tension to the connecting section of the terminal block.)
4. Using the attached heat insulation material, seal the pipe connecting port. Otherwise, dewing may be caused.
5. Mount the cover of the electrical control box without pinching wires.
(Mount the cover after wiring on the ceiling panel.)
LN
U 1 U 2AB
R
(L)
10
10
50
70
S
(N)
Hinge
Screws in 2 positions
Louver connector
(CN510: White)
Side D (Space: 8.5 mm)
Side C (Space: 4 mm)
* Cable clamp can be attached on left side.
Wire
type Specification Cable clamping position
Cabtyre
cable 3-core stranded wire 2.5 mm² Side D
Cabtyre
cable 4-core stranded wire 1.5 mm² Side C
Adhered surface
Notched section
▼Heat insulation to wiring
connecting port
Power supply terminal block
Indoor / Outdoor
inter-unit wire /
Remote
controller
terminal block
Cord clamp Earth wire
Power supply wire
21-EN 22-EN
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–12–
EN
Remote controller wiring
As the remote controller wire has non-polarity, there is no problem if connections to indoor unit terminal blocks A
and B are reversed.
▼Wiring diagram
Wiring between indoor and outdoor units
NOTE
An outdoor unit connected with control wiring between indoor and outdoor units wire becomes automatically the header
unit.
▼Wiring example
A
BA
B
Terminal block for
remote controller
wiring of indoor unit
Remote controller wire
(Field supply)
Terminal block
Remote
controller unit
380-415 V ~, 50 Hz
380 V ~, 60 Hz
220-240 V ~, 50 Hz
220 V ~, 60 Hz
380-415 V ~, 50 Hz
380 V ~, 60 Hz
U1 U2
U1 U2 U3 U4L1 L2 L3 N U5 U6
L N A B
A B
U1 U2 U3 U4L1 L2 L3 N U5 U6
U1 U2L N A B
A B
U1 U2L N A B
A B
U1 U2L N A B
Outdoor Power supply
Earth
terminal Earth terminal
Outdoor Power supply
Earth leakage
breaker Earth leakage breaker
Header outdoor unit Follower outdoor unit
Control wiring between outdoor units
Control wiring between indoor and outdoor units
Control wiring between indoor units
Indoor unit Indoor unit Indoor unit Indoor unit
Earth Earth Earth Earth
Remote controller Remote controller Remote controller
Indoor power supply
Earth leakage breaker
power switch Pull box Pull box Pull box
Wiring for flow selector unit (sold separately)
Connect control wiring and power supply following figure when installing a separately sold Super Heat Recovery
Multi System.
Address setup
Set up the addresses as per the Installation Manual supplied with the outdoor unit.
Wiring on the ceiling panel
According to the Installation Manual of the ceiling panel, connect the connector (20P: White) of the ceiling panel to
the connector (CN510: White) on P.C. board of the electrical control box.
R(L), S(N) terminal block
for power supply
Indoor P.C. board
Faston connection
Earth screw
Earth screw
Power supply Attached wire (Power supply)
Attached wire (Control wiring)
Clamp with remote controller lead wires
CN081
(Black)
23-EN 24-EN
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8Applicable 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 settings of for
applicable controls
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.)
The display content for setting differs from that on the
former types of remote controller (RBC-AMT31E). (The
number of CODE No. has increased.)
1Push button and “TEMP.” button
simultaneously for 4 seconds or more.
After a while, the display flashes as shown in the
figure.
Confirm that the CODE No. is [10].
• If the CODE No. is not [10], 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.)
(While air conditioners are operated under the
group control, “ALL” is displayed first. When
is pushed, the indoor unit number
displayed following “ALL” is the header unit.)
* The settings cannot be changed using the
wireless remote controller, sub remote controller,
or remote-controllerless system (for central
remote controller only). Therefore, install the
wired remote controller to change the settings.
Power
on
flashes
SETTING
goes out
SETTING
Remote
controller
is available
Approx. 5 minutes
Power
on
flashes
SETTING
goes out
SETTING
Remote
controller
is available
Approx. 1 minutes
1
6
1
3
2
5
4
(* Display content varies with
the indoor unit model.)
2Each time you push button, indoor
unit numbers in the control group change
cyclically. Select the indoor unit you want to
change settings for.
The fan of the selected unit runs and the louvers
start swinging. You can confirm the indoor unit for
which you want to change settings.
3Using “TEMP.” / buttons, specify
CODE No. [ ].
4Using timer “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, flashes and then
the display content disappears and the air
conditioner enters the normal stop mode.
(While is flashing, no operation of the remote
controller is accepted.)
Installing indoor unit on high
ceiling
When an indoor unit is installed on a ceiling higher than
the standard height, make the high-ceiling setting for
air volume adjustment.
• Follow the basic operation procedure
(1→2→3→4→5→6).
• For the CODE No. in Procedure 3, specify [5d].
• Select the SET DATA for Procedure 4from the
“Height list of ceiling possible to be installed” table on
page 5 in this manual.
When wireless remote
controller is used
Change the high-ceiling setting with the DIP switch on
the receiver section P.C. board.
For details, refer to the manual of the wireless remote
controller kit. The settings can also be changed with
the switch on the indoor microcomputer P.C. board.
* Once the setting is changed, setting to 0001 or 0003
is possible, however setting to 0000 requires a
setting data change to 0000 using the wired remote
controller (separately sold) with the normal switch
setting (factory default).
◆To restore the factory defaults
To return the DIP switch settings to the factory defaults,
set SW501-1 and SW501-2 to OFF, connect a
separately sold wired remote controller, and then set
the data of CODE No. [5d] to “0000”.
SETTING
SETTING
SET DATA SW501-1 SW501-2
0000
(Factory default) OFF OFF
0001 ON OFF
0003 OFF ON
SW501-1
MCU(IC501)
SW501-2
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EN
Change of lighting time of
filter sign
According to the installation condition, the lighting time
of the filter sign (Notification of filter cleaning) can be
changed.
Follow 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 lighting time 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 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.
Selecting horizontal wind
direction
1. Push and “TEMP.” buttons for 4 seconds or
more when the air conditioner is not working.
flashes.
Indicates CODE No. [01].
2. Select an indoor unit to be set by pushing
button (left side of the button).
Indoor unit number changes each time you push the
button.
The fan of the selected unit runs and the louvers
start swinging.
3. Change the CODE No. to [45] with “TEMP.”
buttons.
4. Select wind direction setting with “TIME”
buttons.
5. Push button to check the setting.
The display state changes from flashing to lighting,
and the setting is fixed.
6. Push button to end the setting.
* When the cold draft position is selected, ceiling
contamination is less reduced.
SET DATA Filter sign lighting time
0000 None
0001 150 H
0002 2500 H (Factory default)
0003 5000 H
0004 10000 H
SET DATA Detection temp 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
Wind
direction SET
DATA Wind direction setting
0000 Smudge reducing position
(Air direction to reduce ceiling
contamination) [Factory default]
0002 Cold draft position
(Air direction to control cold air fall)
No
display
UNIT No.
1-1 UNIT No. 1-2 UNIT No. 1-3
UNIT No.
1-4
Selecting swing type
1. Push for 4 seconds or more when the air
conditioner is not working.
flashes.
Indicates CODE No. [F0].
2. Select an indoor unit to be set by pushing
(left side of the button).
Each time you push the button, unit numbers
change as follows:
The fan of the selected unit runs and the louvers
start swinging.
3. Select a swing type by pushing “TIME”
buttons.
CAUTION
Do not set the swing SET DATA to “0000”.
(This setting may cause a failure of the louvers.)
•About “Dual swing”
“Dual” means that louvers 01 and 03 are directed
and swing in one direction and louvers 02 and 04 are
directed and swing in the opposite direction.
(When louvers 01 and 03 are directed downward,
louvers 02 and 04 are directed horizontally.)
•About “Cycle swing”
The four louvers swing independently at respective
timings.
4. Push button.
5. Push button to complete the setting.
Swing SET DATA Swing of louvers
0001 Standard swing
(Factory default)
0002 Dual swing
0003 Cycle swing
No
display
UNIT No.
1-1 UNIT No. 1-2 UNIT No. 1-3
UNIT No.
1-4
Swing SET DATA
04 02
03
01
Electrical control box
Drain
pipe
Refrigerant
pipe
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Locking the louvers
(No swing)
1. Push (right side of the button) for 4 seconds
or more when the air conditioner is not working.
flashes.
Indicates CODE No. [F1].
2. Select an indoor unit to be set by pushing
(left side of the button).
Each time you push the button, unit numbers
change as follows:
The fan of the selected unit runs and the louvers
start swinging.
3. Select a louver you want to lock by pushing “TEMP.”
buttons.
4. Select the wind direction of the louver you do not
want to swing by pushing “TIME” buttons.
* When (4) or (5) is selected, dew drop may occur
during cooling mode.
5. Determine the setting by pushing button.
When the setting has been determined, lights
up.
6. Push button to complete the setting.
Cancelling louver lock
Set the wind direction to “0000” of the louver lock setup
procedure above.
• When the setting is canceled, goes out.
Other operations are the same as those in
“Locking the louvers (No swing)”.
Group control
In a group control, a remote controller can control up to
maximum 8 units.
• For wiring procedure and wiring method of the
individual line (Identical refrigerant line) system,
refer to “Electric work” in this Manual.
• Wiring between indoor units in a group is performed
in the following procedure.
Connect the indoor units by connecting the remote
controller inter-unit wires from the remote controller
terminal blocks (A/B) of the indoor unit connected
with a remote controller to the remote controller
terminal blocks (A/B) of the other indoor unit.
(Non-polarity)
• For address setup, refer to the Installation Manual
attached to the outdoor unit.
Remote controller sensor
The temperature sensor of the indoor unit senses room
temperature usually. Set the remote controller sensor
to sense the temperature around the remote controller.
Select items following the basic operation procedure
(1→2→3→4→5→6).
• Specify [32] for the CODE No. in Procedure 3.
• Select the following data for the SET DATA in
Procedure 4.
When flashes, the remote controller sensor is
defective.
Select the SET DATA [0000] (not used) or replace the
remote controller.
UNIT No.
1-1 UNIT No. 1-2 UNIT No. 1-3
UNIT No.
1-4
(1)
0001
(2)
0002
(3)
0003
(5)
0005
(4)
0004
SET DATA
0001-0005
(Louver lock position code)
SET DATA 0000 0001
Remote controller
sensor Not used (factory default) Used
0000
Setting data
9Test 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 of
the power supply 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 be for operating.
• Never press the electromagnetic contactor to forcibly
perform a test run. (This is very dangerous because
the protective device does not work.)
• Before starting a test run, be sure to set addresses
following the installation manual supplied with the
outdoor unit.
Executing a test run
Using the 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 thermo.-OFF.
In order to prevent a serial operation, the forced test
run is released after 60 minutes have passed and
returns to the usual operation.
CAUTION
Do not use the forced test run for cases other than the
test run because it applies an excessive load to the
devices.
◆In case of wired remote controller
1Keep 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.
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
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EN
◆Wireless remote controller
(RBC-AX31U series)
1Turn on the power of the air conditioner.
When power is turned on for the first time after
installation, it takes approx. 5 minutes until the
remote controller becomes available. In the case
of subsequent power-on, it takes approx. 1 minute
until the remote controller becomes available.
Execute a test run after the predetermined time
has passed.
2Push “ON/OFF” button on the remote
controller, select [ Cool] or [ Heat] with
“MODE” button, and then select [ HIGH]
with “FAN” button.
3
4
5
6Repeat procedures 4→5→4→5.
Indicators “Operation” (green), “Timer” (green),
and “Ready” (orange) in the wireless receiver
section flash in approx. 10 seconds, and the air
conditioner starts operation. If any of these
indicators does not flash, repeat procedures 3to
5.
7Upon completion of the test run, push “ON/
OFF” button to stop operation.
<Overview of test run operations using the
wireless remote controller>
▼Cooling test run:
ON/OFF →18 °C →19 °C →18 °C →19 °C →18 °C
→19 °C →18 °C →(test run) →ON/OFF
▼Heating test run:
ON/OFF →30 °C →29 °C →30 °C →29 °C →30 °C
→29 °C →30 °C →(test run) →ON/OFF
◆New wireless remote controller
(RBC-AX32U series)
Test run (forced cooling operation)
REQUIREMENT
Finish the forced cooling operation in a short time
because it applies excessive strength to the air
conditioner.
▼How to perform forced cooling operation
1When TEMPORARY button is pushed for 10
seconds or more, “Pi!” sound is heard and
the operation changes to a forced cooling
operation. After approx. 3 minutes, a cooling
operation starts forcedly.
Check cool air starts blowing. If the operation does
not start, check wiring again.
2To stop a test operation, push TEMPORARY
button once again (approx. 1 second).
• Check wiring / piping of the indoor and outdoor units
in forced cooling operation.
Cooling test run Heating test run
Set the temperature to 18 °C
with the temp. setup buttons. Set the temperature to 30 °C with the temp. setup buttons.
Cooling test run Heating test run
After confirming a signal
receiving sound “beep”
immediately set the
temperature to 19 °C with
the temp. setup buttons.
After confirming a signal
receiving sound “beep”
immediately set the
temperature to 29 °C with
the temp. setup buttons.
Cooling test run Heating test run
After confirming a signal
receiving sound “beep”
immediately set the
temperature to 18 °C with
the temp. setup buttons.
After confirming a signal
receiving sound “beep”
immediately set the
temperature to 30 °C with
the temp. setup buttons.
3, 4,
5, 6
2,7
2
2
Always select
[ HIGH] air
volume.
TEMPORARY
button
10Maintenance
CAUTION
Before maintenance, be sure to turn off the leakage
breaker.
Cleaning of air filter
• If is displayed on the remote controller, maintain
the air filter.
• Clogging of the air filter reduce cooling / heating
performance.
Cleaning of panel and air filter
Preparation :
1. Turn off the air conditioner by the remote controller.
2. Open the air intake grille.
• Slide the button of the air intake grille inward, and
open the air intake grille slowly while holding it.
Cleaning of air filters
If the air filters are not cleaned, it not only reduce the
cooling a performance of air conditioner but causes a
failure in the air conditioner such as water falling in
drops.
Preparation :
1. Stop the operation by remote controller.
2. Dismount the air filter.
Use a vacuum cleaner to remove dust from
the filters or wash them with water.
• After rinsing the air filters with water, dry them in the
shade.
• Set the air filter into the air conditioner.
Clean the panel and air filter with water:
• Wipe down the panel and air filter with a sponge or
towel moistened with a kitchen detergent. (Do not
use any metallic brush for cleaning.)
•Carefully rinse the panel and air filter to wash out
the detergent.
•After rinsing the panel and air filter with water,
dry it in the shade.
1. Close the air intake grille.
• Close the air intake grille, slide the knob outward,
and fix the air intake grille securely.
2. Push button.
• “FILTER ” disappears.
CAUTION
• Do not start the air conditioner while leaving the panel
and air filter removed.
• Push the filter reset button. ( indication will be turn
off.)
Air intake
grille
Knob
Strap to
prevent falling
Air filter
Knob
Air intake
grille
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Cleaning of discharge louver
The discharge louver can be removed to clean.
1. Remove the discharge louver.
• Holding the both ends of the discharge louver,
remove the louver sagging the center downward.
2. Cleaning with water
• If the dirt is terrible, clean the louver by tepid water
with neutral detergent or water.
3. Mount the discharge louver.
• First push in one side of the louver, and then insert
the other side sagging the center downward.
REQUIREMENT
Be sure to clean the heat exchanger with
pressurized water.
If a commercially available detergent (strong alkaline or
acid) cleaning agent is used, the surface treatment of the
heat exchanger will be marred, which may degrade the
self cleaning performance.
For details, contact the dealer.
Be careful to the direction of the louver when
mounting.
Mount the louver so that the side with the mark faces
upward and the arrow direction of the mark directs.
(2) Insert in the louver sagging
down the center downward.(1) Insert
▼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.
Inspection before maintenance
Following inspection must be carried out by a qualified installer or qualified service person.
▼Maintenance List
Parts 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 Access from inspection opening and remove the access panel. Check if there is any clogging or drain
water is polluted.
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.
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EN
11Troubleshooting
Confirmation and check
When an error occurred in the air conditioner, the
check code and the indoor unit No. appear on the
display part of the remote controller.
The check 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 log is stored in memory up to 4 errors.)
The log can be confirmed from both operating status
and stop status.
1When pushing and buttons for 4
seconds or more, following display appears.
If [ Service check] is displayed, the mode enters
in the error log mode.
•[01 : Order of error log] is displayed in CODE
No. window.
• [Check code] is displayed in CHECK window.
• [Indoor unit address in which an error occurred]
is displayed in Unit No.
2Every pushing of “TEMP.” 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.
Check code Indoor unit No. in which
an error occurred
3
2
1
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Check method
On the wired remote controller, central control remote controller and the interface P.C. board of the outdoor unit (I/F), a check display LCD (Remote controller) or 7-segment display (on the outdoor interface P.C. board) to display the operation
is provided. Therefore the operation status can be known. Using this self-diagnosis function, a trouble or position with error of the air conditioner can be found as shown in the table below.
Check code list
The following list shows each check code. Find the check contents from the list according to part to be checked.
• In case of check from indoor remote controller: See “Wired remote controller display” in the list.
• In case of check from outdoor unit: See “Outdoor unit 7-segment display” in the list.
• In case of check from AI-NET central control remote controller: See “AI-NET central control display” in the list.
• In case of check from indoor unit with a wireless remote controller: See “Sensor block display of receiving unit” in the list.
: Lighting, : Flashing, : Goes off
AI-NET: Artificial Intelligence
IPDU: Intelligent Power Drive Unit
ALT: Flashing is alternately when there are two flashing LED.
SIM: Simultaneous flashing when there are two flashing LED.
Check code Wireless remote controller
Check code name Judging device
Wired remote
controller display
Outdoor unit 7-segment display AI-NET central
control display
Sensor block display of receiving unit
Auxiliary code Operation Timer Ready Flash
E01 — — — Communication error between indoor unit and remote controller (Detected at
remote controller side) Remote controller
E02 — — — Remote controller transmission error Remote controller
E03 — — 97 Communication error between indoor unit and remote controller (Detected at
indoor unit side) Indoor unit
E04 — — 04 Communication circuit error between indoor / outdoor unit (Detected at indoor
unit side) Indoor unit
E06 E06 No. of indoor units in which sensor has been
normally received 04 Decrease of No. of indoor units I/F
—E07 — — Communication circuit error between indoor / outdoor unit (Detected at
outdoor unit side) I/F
E08 E08 Duplicated indoor unit addresses 96 Duplicated indoor unit addresses Indoor unit • I/F
E09 — — 99 Duplicated master remote controllers Remote controller
E10 — — CF Communication error between indoor unit MC Indoor unit
E12 E12 01:Indoor / Outdoor units communication
02:Outdoor / Outdoor units communication 42 Automatic address start error I/F
E15 E15 — 42 No indoor unit during automatic addressing I/F
E16 E16 00:Capacity over
01 ~:No. of connected units 89 Capacity over / No. of connected indoor units I/F
E18 — — 97, 99 Communication error between header and follower units Indoor unit Indoor unit
E19 E19 00:No header
02:Two or more header units 96 Outdoor header units quantity error I/F
E20 E20 01:Outdoor unit of other line connected
02:Indoor unit of other line connected 42 Other line connected during automatic address I/F
E21 E21 02:No header unit
00:Multiple number of header units 42 Error in number of heat storage master units I/F
E22 E22 — 42 Reduction in number of heat storage units I/F
E23 E23 — 15 Sending error in communication between outdoor units
Error in number of heat storage units (trouble with reception) I/F
E25 E25 — 15 Duplicated follower outdoor addresses I/F
E26 E26 No. of outdoor units which received signal
normally 15 Decrease of No. of connected outdoor units I/F
E28 E28 Detected outdoor unit number d2 Follower outdoor unit error I/F
E31 E31 Number of IPDU (*1) CF IPDU communication error I/F
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