Toshiba MMC-UP0151HP-E User manual

English
AIR CONDITIONER (MULTI TYPE)
Installation Manual
Indoor Unit
Model name:
For commercial use
Ceiling Type
MMC-UP0151HP-E
MMC-UP0181HP-E
MMC-UP0241HP-E
MMC-UP0271HP-E
MMC-UP0361HP-E
MMC-UP0481HP-E
MMC-UP0561HP-E
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Manual are available in AR/BG/CZ/DA/DE/EL/EN/ES/ET/FI/FR/
HR/HU/IT/LT/LV/NL/NO/PL/PT/RO/RU/SK/SL/SV/TR.

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1-EN 2-EN
Contents
1 Accessory parts..............................................................................................................2
2 Selection of installation place ....................................................................................... 2
3 Installation....................................................................................................................... 3
4 Drain piping..................................................................................................................... 6
5 Refrigerant piping...........................................................................................................8
6 Electrical connection...................................................................................................... 9
7 Applicable controls ...................................................................................................... 13
8 Test run.......................................................................................................................... 15
9 Maintenance ..................................................................................................................16
10 Troubleshooting............................................................................................................ 17
11 Specifications ............................................................................................................... 22
12 Notice code ................................................................................................................... 22
13 Appendix ....................................................................................................................... 22
Original instruction
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.

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3-EN 4-EN
2Selection of installation place
CAUTION
• Do not install in a location where flammable gas may leaks are possible.
If the gas leak and accumulate around the unit, it may ignite and cause a fire.
• When an outdoor unit using R32 refrigerant is combined with indoor unit, be attention to the floor area
in the room to be installed.
Indoor units cannot be installed in rooms with a floor area less than the minimum floor area. For details, follow
the Installation Manual to the outdoor unit.
Avoid installing in the following places.
Select a location for the indoor unit where the cool or warm air will circulate evenly.
Avoid installation in the following kinds of locations.
• Saline area (coastal area).
• Locations with acidic or alkaline atmospheres (such as areas with hot springs, factories where chemicals or
pharmaceuticals are made and places where the exhaust air from combustion appliances will be sucked into the
unit).
Doing so may cause the heat exchanger (its aluminum fins and copper pipes) and other parts to become
corroded.
• 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.
• Locations with atmospheres with mist of cutting oil or other types of machine oil.
Doing so may cause the heat exchanger to become corroded, mists caused by the blockage of the heat
exchanger to be generated, the plastic parts to be damaged, the heat insulators to peel off, and other such
problems to result.
• Locations where vapors from food oils are formed (such as kitchens where food oils are used).
Blocked filters may cause the air conditioner’s performance to deteriorate, condensation to form, the plastic
parts to be damaged, and other such problems to result.
• Locations near obstructions such as ventilation openings or lighting fixtures where the flow of the blown air will
be disrupted (a disruption of the air flow may cause the air conditioner’s performance to deteriorate or the unit to
shut down).
• Locations where an in-house power generator is used for the power supply.
The power line frequency and voltage may fluctuate, and the air conditioner may not work properly as a result.
• On truck cranes, ships or other moving conveyances.
• The air conditioner must not be used for special applications (such as for storing food, plants, precision
instruments or art works).
(The quality of the items stored may be degraded.)
• Locations where high frequencies are generated (by inverter equipment, in-house power generators, medical
equipment or communication equipment).
(Malfunctioning or control trouble in the air conditioner or noise may adversely affect the equipment’s operation.)
• Locations where there is anything under the unit installed that would be compromised by wetness.
(If the drain has become blocked or when the humidity is over 80%, condensation from the indoor unit will drip,
possibly causing damage to anything underneath.)
• In the case of the wireless type of system, rooms with the inverter type of fluorescent lighting or locations
exposed to direct sunlight.
(The signals from the wireless remote controller may not be sensed.)
• Locations where organic solvents are being used.
• The air conditioner cannot be used for liquefied carbonic acid cooling or in chemical plants.
• Location near doors or windows where the air conditioner may come into contact with high-temperature,
high-humidity outdoor air.
(Condensation may occur as a result.)
• Locations where special sprays are used frequently.
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.
1Accessory parts
Part name Q’ty Shape Usage
Installation Manual 1 This manual For hand over to customers
Heat insulating pipe 2 For heat insulation of pipe connecting section
Washer 4 M10 × Ø25 For holding down unit
Hose band 2 For connecting drain pipe
Drain hose 1 For connecting drain pipe
Bushing 1 For protection of edge at power taking-in port
Heat insulator 1 For heat insulation of drain hose (10t × 190 × 190)
Heat insulator of top plate 1 For upper pipe hole of indoor unit (6t × 120 × 160)
Banding band 6 For heat insulation of pipe connecting section (n=4) and
drain hose heat insulator (n=2).
Safety Manual 1 For hand over directly to the customer

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5-EN 6-EN
87
170320
176
205
98
158
244
218
690
102
132
192
235
D
C
E
125
87
33
191
40145
48
66109
33 85
A
250 or more 250 or more
Approx. 8 m
Left drain pipe connecting port
Refrigerant pipe (Gas side)
B (Hanging position)
Refrigerant pipe (Liquid side)
Power supply wire take-in port
(knockout hole Ø40)
Signal receiving unit mounting section
500 or more
■Installation space
Reserve sufficient space required for installation or service work.
■Ceiling height
■External dimensions
■In case of wireless type
If height of ceiling exceeds 3.5 m, hot air becomes difficult to reach the floor surface, and then the change of setup
of high ceiling is necessary.
For the change method of high ceiling, refer to the application control, “Installing indoor unit on high ceiling” in this
Manual.
▼Height list of ceiling possible to be installed
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.
For change the setup time, refer to the application control, “Filter sign setting” and “To secure better effect of
heating” in this Manual.
Decide the position which remote controller is operated and the installation place.
And then refer to the Installation Manual of the wireless remote controller kit sold separately.
(The signal of the wireless type remote controller can be received within approx. 8 m. This distance is a criterion
and varies a little according to capacity of the battery)
• To prevent malfunction, select a place where is not affected by a fluorescent lamp or direct sunlight.
• Two wireless-type indoor units can be set in a room.
3Installation
Model MMC- Possible installed ceiling height
UP015 to UP027 Up to 4.0 m
UP036 to UP056 Up to 4.3 m
Model MMC- UP015 to UP027 UP036 to UP056 SET DATA
Standard (Factory default) Up to 3.5 m Up to 3.5 m 0000
High ceiling (1) Up to 4.0 m Up to 4.3 m 0003
(Unit: mm)
Drain pipe connecting port
Remote controller wire take-in port
Remote controller wire take-in
port (Knockout hole)
(Hanging position)
Upper pipe draw-out port (knockout hole)
Power supply wire take-in port
(knockout hole Ø40)
Left drain pipe draw-out port
(knockout hole)
Model MMC- A B C D E
UP015, UP018 950 906 351 270 353
UP024, UP027 1270 1223
UP036 to UP056 1586 1540 376 303 378
(Unit: mm)
CAUTION
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 or let a person get on it. (Even units are packaged)
• Carry in the indoor unit as it is packaged if possible. If carrying in the indoor unit unpacked by necessity, use buffering
cloth or other material to not damage the unit.
• Carry the package by two or more persons, and do not bundle it with plastic band at positions other than specified.
• To install vibration isolation material to hanging bolts, confirm that it does not increase the unit vibration.

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7-EN 8-EN
108
162
90
110
120
150
CAUTION
Cushions are inserted between the side panel and
hanging hook for transportation.
(In the two places shown above)
Remove them before installation.
Installation pattern
Ceiling surface
Wall face
Cushion
Additional hole required when
Drain-Up Kit is used (Ø100)
Pipe hole on top face (Ø100)
Back side of chassis
Backside cover Top face of chassis
Pipe hole on back side (Ø100)
Lateral side of
chassis
Slide
Air intake grille
fixing knob
Hinge
Air intake grille
Side panel
Side panel fixing screw
Slide forward.
Louver
■Installation of hanging bolt
• Consider the piping / wiring after the unit is hung to
determine 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 and installation pattern.
Procure hanging bolts washer and nuts for installing
the indoor unit (these are not supplied).
Hanging bolt M10 or W3/8 4 pieces
Nut M10 or W3/8 8 pieces
• To fasten the hanging bracket from above and below,
twelve pieces of nuts are required.
How to use attached installation pattern
Using the pattern, positioning of the hanging bolt and
pipe hole can be performed.
The installation pattern is printed on the packing
carton. Cut it off the carton.
* As an error to some degree may generate on the
pattern size due to temperature and humidity, be
sure to confirm the size.
Hole for drawing out pipe from top face
(Bottom View)
Lateral side
of chassis
Hole for drawing out pipe from back side
(Front View)
Installation of hanging bolt
Use M10 hanging bolts (4 pcs, locally procured).
Matching to the existing structure, set pitch according
to size in the “External dimensions”.
■Installation of remote
controller (Sold separately)
For installation of the 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.
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.
• Operate the remote controller, confirm that the
indoor unit receives a signal surely, and then install it.
(Wireless type)
• Keep 1 m or more from the devices such as
television, stereo.
(Disturbance of image or noise may generate.)
(Wireless type)
■Before installation
Indoor
unit
50 mm or less
Ceiling
surface
Hanging bracket
New concrete slab
Install the bolts with insert brackets or anchor bolts.
(Blade type
bracket)
(Slide type
bracket)
Rubber
(Pipe hanging
anchor bolt)
Anchor bolt
Steel frame structure
Use existing angles or install new support angles.
Hanging bolt
Hanging bolt Support angle
Existing concrete slab
Use a hole-in anchors, hole-in plugs, or a hole-in
bolts.
1Removal of air intake grille
1) Remove the screws of air intake grille fixing
knob on a side of each filter.
2) Slide the air intake grille fixing knobs
(two positions) toward the arrow direction
(OPEN), and then open the air intake grille.
3) With the air intake grille open, hold the hinge
from above and below with one hand and take
out the air intake grille with the other hand
while gently pushing it. (There are two air
intake grilles.)
2Removal of side panel
After removing the side panel fixing screws
(1 each at right and left), slide the side panel
forward and then remove it.

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>PP< FRO
Ø100
Grooves
Rear cover
Opened when refrigerant pipe is
taken out from the rear side
Opened when only drain pipe is
taken out from the rear side
Groove
Side panel (Right)
Side panel (Left side)Groove
Indoor
unit
Hanging bolt
(locally procured)
Ceiling surface
Hanging metal
Washer (Accessory)
Double nut
(locally procured)
Nut
(locally procured)
Indoor
unit
Hanging bolt
(locally procured)
Ceiling surface
Hanging metal
Washer (Accessory)
Double nut
(locally procured)
Indoor
unit
Hanging bolt
(locally procured)
Washer
(locally procured)
Washer (Accessory)
Double nut
(locally procured)
Ceiling surface
20 to 30
Washer
(Accessory)
Double nut
(locally procured)
Hanging bolt
■Draw-out direction of pipe /
wire
Decide installation place of the unit and draw-out
direction of pipe and wire.
■Pipe knockout hole
In case of taking pipe from the rear side
* Cut off the groove section with a plastic cutter.
<In case of taking pipe from right side>
* Cut off the groove section with a metal saw or plastic
cutter.
<In case of taking pipe from left side>
Taking pipe from left side is applied only to the
drain pipe.
The refrigerant pipe cannot be taken out from the
left side.
* Cut off the groove section with a metal saw or plastic
<In case of taking pipe from upper side>
Taking pipe from upper side is applied only to the
refrigerant pipe.
When taking out the drain pipe from the upper side,
use a drain up kit sold separately.
Open the upper pipe draw-out port (Knockout hole)
shown in the external dimensions.
Make the diagonally shaded hole when
you do not use the Elbow Piping Kit.
Make only this knockout hole when
you use the separately sold Elbow
Piping Kit.
After piping, cut off the attached heat insulator of the
top plate to pipe shape, and then seal the knockout
hole.
■Knockout hole of power wire
take-in port
Open the power wire take-in port (Knockout hole)
shown in the “External dimensions” and then mount the
attached bushing.
■Installation of indoor unit
◆Preparation before holding down
main unit
* Confirm the presence of the ceiling material
beforehand because the fixing method of hanging
metal when the ceiling material is set differs from that
when the ceiling material is not set.
<There is ceiling material>
• Fix the hanging bracket as shown below if the ceiling
is bent upwards when you fasten lower nuts to the
hanging bracket.
<There is no ceiling material>
◆Holding down of main unit
<Hanging the indoor unit directly from the
ceiling>
9-EN 10-EN
1Attach washer and nuts to the hanging bolt.
2Hang the unit to the hanging bolt as shown the
figure below.
3As shown in the figure below, fix the ceiling
material securely with the double nuts.

– 6 –
Screw Hanging bracket
Bolts for fastening the hanging
bracket (Loosen these bolts.)
Use bolts to fasten the
hanging bracket.
Arched shape
Incorrect
Trap
Indoor Unit
7 to 12 mm
Adjust the length of the bolts for
fastening the hanging bracket.
Front (Unit : mm)
N
(inside dimension) Ceiling surface
1.5 m to 2 m Support
bracket
Heat
insulator Downward slope
1/100 or more
As long as possible
(Approx. 10 cm)
(Collective
piping) Downward slope
1/100 or more VP30
Drain pan
Adhesive
agent
prohibited
Soft
socket
Attached drain hose
Attached hose band
Soft
socket
VP 20 Polyvinyl
chloride pipe
(locally procured)
◆Attaching the hanging bracket
first
Hanging bolt
(locally procured) Hanging bracket fixing board
Bolts for fastening the hanging bracket
(Fasten the bolts tight.)
4Drain piping
CAUTION
Following the Installation Manual, perform the drain piping work so that water is properly drained. Apply a
heat insulation so as not to cause a dew condensation.
Inappropriate piping work may result in water leakage in the room and wet furniture.
• Provide the indoor drain piping with proper heat insulation.
• Provide the area where the pipe connects to the indoor unit with proper heat insulation. Improper heat insulation
will cause condensation to form.
• The drain pipe must be sloping downward (at an angle of 1/100 or more), and do not run the pipe up and down
(arched shape) or allow it to form traps. Doing so may cause abnormal sounds.
• Restrict the length of the traversing drain pipe to 20 meters or less. For a long pipe, provide support brackets at
intervals of 1.5 to 2 meters to prevent flapping.
• Install the collective piping as shown in the following figure.
• Do not provide any air vents. Otherwise, the drain water will spout, causing water to leak.
• Do not allow any force to be applied to the connection area with the drain pipe.
• A hard PVC pipe cannot be connected to the drain pipe connecting port of the indoor unit. Be absolutely sure to
use the flexible hose provided for the connections with the drain pipe connecting port.
• Adhesive agents cannot be used for the drain pipe connecting port (hard socket) of the indoor unit. Be absolutely
sure to secure the pipe using the hose bands provided. Use of an adhesive agent may damage the drain pipe
connecting port or cause water to leak.
Drain pipe
connecting port
(hard socket)
■Pipe material, size and insulator
The following materials for piping work and insulating process are procured locally.
Pipe material Hard vinyl chloride pipe VP20 (Nominal outer diameter 26 mm)
Insulator Foamed polyethylene foam, thickness: 10 mm or more
Model MMC- N
UP015, UP018 867 to 872
UP024, UP027 1184 to 1189
UP036 to UP056 1501 to 1506
11-EN 12-EN
1Remove the screws fastening hanging bracket
onto the indoor unit.
2Loosen the bolts fastening hanging bracket
onto the indoor unit and remove the hanging
bracket.
3Adjust the length of the two bolts for fastening
the hanging bracket, as shown below.
4Fasten the hanging bracket with the hanging
bolts and ensure that the bracket is level from
front to back and from side to side.
5Attach the indoor unit onto the hanging
bracket and fasten it tight with the bolts and
screws.
Double nut
(locally procured)
Washer
(Accessory)
Attached
hose band
CAUTION
• The ceiling is not always level. Use the level gauge
to measure the level of the ceiling in the width and
depth directions. Adjust the bolts for the hanging
brackets so that the level error will be within 5 mm.
• Do not lower the air discharge side and the side
opposite to the selected drain pipe withdraw.

– 7 –
Drain pipe
REQUIREMENT
• Fix the drain hose with the attached hose band, and set the
tightening position upward.
• As the draining is the natural water draining, arrange the pipe
outside of the unit on the down slope.
• If piping is performed as shown in the figure, drain cannot be
discharged.
Drain pan
Plug
Drain pipe
Refrigerant pipe
Fit the attached hose band to the end of the
hose, lay down the knob, and then tighten hose
band.
Drain pan
10 to 15 mm 10 to 15 mm
Attached drain hose
Confirm that soft hose is pushed in up to the end of the drain pan.
Fit the attached hose band to the end
of the hose, with both of the two knobs
oriented sideways.
■Connection of drain hose
• Insert the attached drain hose into the drain pipe connecting port on the drain pan up to the end.
• Fit the attached hose band to the end of the pipe connecting port, and then tighten it securely.
■Connecting drain pipe
NO GOOD
Drain pipe
Connect the hard vinyl chloride pipe (locally procured) to the mounted drain hose which
was attached. When Plug is detached, the drain pipe is not damaged. It causes the water
leak.
In case of taking pipe from the left side
In case of taking pipe from the left side, exchange the plug from left to right. Push in the
plug of which end is not sharp up to the end.
■Drain up
When a down-gradient cannot be secured for the drain pipe, drain-up piping is possible.
• The height of the drain pipe must be 600 mm or less from the underside of the indoor unit.
• When Drain Pump Kit (sold separately) is installed, drain pipe and refrigerant pipe can only be connected from
upper direction.
■Heat insulating process
• Using the attached drain hose heat insulator, lap the connecting section and the drain hose without clearance,
and then tighten with two handing band so that heat insulator does not open.
• Covering the attached drain hose heat insulator, lap the heat insulator (locally procured) to the drain pipe without
clearance.
* Fasten the binding bands in such a manner as to not
squeeze the attached insulating material excessively.
Lap the attached
heat insulation so
that the one end is
put on the other end
at the upper side.
* Tighten the banding band so that attached
heat insulator is not pushed excessively.
13-EN 14-EN
Lap covering connecting section
between drain pan and drain hose.
Drain
pan
Drain hose
Hose band Banding band
Heat insulator
(locally procured)
Hose band
Attached heat insulator

– 8 –
Work using double spanner
A
5 Refrigerant piping ■Connecting refrigerant piping
Flaring diameter size: A (Unit: mm)
* In case of flaring for R32 or 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.
• The sealed gas was sealed at the atmospheric
pressure so when the flare nut is removed, there
will no “whooshing” sound: This is normal and is not
indicative of trouble.
• Use two wrenches to connect the indoor unit pipe.
• Use the tightening torque levels as listed in the table
below.
Outer dia. of
connecting pipe (mm) Tightening torque (N•m)
6.4 14 to 18 (1.4 to 1.8 kgf•m)
9.5 34 to 42 (3.4 to 4.2 kgf•m)
12.7 49 to 61 (4.9 to 6.1 kgf•m)
15.9 63 to 77 (6.3 to 7.7 kgf•m)
• Tightening torque of flare pipe connections.
Pressure of R32 or 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.
15-EN 16-EN
Outer dia. of copper pipe A +0
–0.4
6.4 9.1
9.5 13.2
12.7 16.6
15.9 19.7
Right
Upper Back
■Take out direction of
refrigerant pipe
• The refrigerant pipe connecting sections are located
as shown below. (Pipes can be taken out from one of
the three directions.)
• Make a pipe knockout hole, referring to the section
“Pipe knockout hole”.
* When Drain Pump Kit (sold separately) is installed, a
refrigerant pipe can only be taken out from upper direction.
■Permissible piping length and
height difference
They vary depending on the outdoor unit. For details,
refer to the Installation Manual attached to the
outdoor unit.
■Pipe size
Model MMC- Pipe size (mm)
Gas side Liquid side
UP015 to UP018 Ø12.7 Ø6.4
UP024 to UP056 Ø15.9 Ø9.5
Flaring
1Cut the pipe with a pipe cutter.
Remove burrs completely. (Remaining burrs may
cause gas leakage.)
2Insert a flare nut into the pipe, and flare the
pipe.
Use the flare nut provided with the unit or the
one used for the R32 or R410A refrigerant.
The flaring dimensions for R32 or R410A are
different from the ones used for the conventional
R22 refrigerant. A new flare tool manufactured
for use with the R32 or R410A refrigerant is
recommended, but the conventional tool can still
be used if the projection margin of the copper pipe
is adjusted to be as shown in the following table.
Projection margin in flaring: B (Unit: mm)
Outer dia. of
copper pipe Tool used Conventional tool used
6.4, 9.5 0 to 0.5 1.0 to 1.5
12.7, 15.9
B
CAUTION
Tightening with an excessive torque may crack the nut
depending on installation conditions.
CAUTION
• Do not scratch the inner surface of the flared part
when removing burrs.
• Flare processing under the condition of scratches
on the inner surface of flare processing part will
cause refrigerant gas leak.
• Check that the flared part is not scratched,
deformed, stepped, or flattened, and that there
are no chips adhered or other problems, after flare
processing.
• Do not apply refrigerating machine oil to the flare
surface.
CAUTION
Use flare nuts that are included with the unit. Using
different flare nuts may cause refrigerant gas leakage.
■Refrigerant piping
Use the following item for the refrigerant piping.
Material: Seamless phosphorous de-oxidized
copper pipe.
6.35, 9.52 and 12.7 wall thickness 0.8 mm or more.
15.88 wall thickness 1.0 mm or more.
REQUIREMENT
When the refrigerant pipe is long, provide support
brackets at intervals of 2.5 - 3 m to clamp the
refrigerant pipe. Otherwise, abnormal sound may be
generated.
CAUTION
IMPORTANT 4 POINTS FOR PIPING WORK
1. Reusable mechanical connectors and flared
joints are not allowed indoors. When mechanical
connectors are reused indoors, sealing parts shall
be renewed.
When flared joints are reused indoors, the flare
part shall be re-fabricated.
2. Tight connection (between pipes and unit)
3. Evacuate the air in the connecting pipes by using
VACUUM PUMP.
4. Check the gas leakage. (Connected points)

– 9 –
6Electrical connection
Open the valve fully
Open the valve of the outdoor unit fully. A 4 mm-
hexagonal wrench is required for opening the valve.
For details, refer to the Installation Manual attached to
the outdoor unit.
Gas leak check
Check with a leak detector or soap water whether gas
leaks or not, from the pipe connecting section or cap
of the valve.
REQUIREMENT
Use a leak detector manufactured exclusively for HFC
refrigerant (R32, R134a, R410A, 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, use
the material with heat-resisting temperature 120°C
or higher.
• To use the attached heat insulation pipe, 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).
Attached
banding band
Fix it with vinyl tape
Face the incision upward.
Local piping side
At ached heat
insulation pipe
WARNING
yUse the specified wires for wiring connect the terminals. Securely fix them to prevent external forces
applied to the terminals from affecting the terminals.
Incomplete connection or fixation may cause a fire or other trouble.
yConnect earth wire. (grounding work)
Incomplete earthing cause an electric shock.
Do not connect earth wires to gas pipes, water pipes, lightning conductor or telephone earth wires.
yAppliance 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
• For communication line, use wires with the same type and size. lf each wire has a differenttype and size
from another one, it will cause a communication trouble.
• If incorrect / incomplete wiring is carried out, it will cause an electrical fire or smoke.
• Install an earth leakage breaker that is not tripped by shock waves. If an earth leakage breaker is notinstalled, an
electric shock may be caused.
• Use the cord clamps attached to the product.
• Do not damage or scratch the conductive core and inner insulator of power and system interconnection wires
when peeling them.
• Use the power supply wire and control wires of specified thickness, type, and protective devices required.
• Do not connect 208-240V power to the terminal blocks (Uv (U1)), (Uv (U2)), (A), (B) 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.
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.
• 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 burnout 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, circuit 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.
17-EN 18-EN
■Evacuation
Perform vacuuming from the charge port of valve of
the outdoor unit by using a vacuum pump.
For details, follow to the Installation Manual attached to
the outdoor unit.
• Do not use the refrigerant sealed in the outdoor unit
for evacuation.
REQUIREMENT
For the tools such as charge hose, use those
manufactured exclusively for R32 or R410A.
Refrigerant amount to be added
For addition of the refrigerant, add refrigerant “R32 or
R410A” referring to the attached Installation Manual of
outdoor unit.
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.
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 F-GAS label of the outdoor unit. It is
necessary to fix the compressor and refrigeration
cycle malfunction.
■Airtight test / Air purge, etc.
For air tightness test, vacuum drying and adding
refrigerant, refer to the Installation Manual attached to
the outdoor unit.
CAUTION
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.)

– 10 –
19-EN 20-EN
▼Power supply
Power supply 220-240V ~, 50 Hz
208-230V ~, 60 Hz
Power supply switch / circuit 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
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.
▼Communication line
TU2C-Link models (U series) can be combined with TCC-Link models (other than U series).
For details of communication type, refer to the following table.
Communication type and model names
Communication
type
TU2C-Link
(U series and future models)
TCC-Link
(Other than U series)
Outdoor unit
MMY-MUP½½½
This letter indicates U series model.
Other than U series
MMY-MHP½½½
MCY-MHP½½½
MMY-MAP½½½
Indoor unit
MM½-UP½½½
This letter indicates U series model.
Other than U series
MM½-AP½½½
Wired remote
controller
RBC-ASCU½½½
This letter indicates U series model.
Other than U series
Wireless remote
controller kit &
receiver unit
RBC-AXU½½½
This letter indicates U series model.
Other than U series
U series outdoor unit : SMMS-u (MMY-MUP½½½)
Other than U series outdoor unit : SMMS-i, SMMS-e etc. (MMY-MHP½½½)
<In the case of combining with outdoor units of Super Modular Multi System u series (SMMS-u)>
Uv line and Uc line (L2, L3, L4)
(2-core shield wire, non-polarity) Wire size : 0.5 mm² 0.75 to 1.25 mm²
(Up to 500 m)
(Up to 1000 m)
Uh line (L1)
(2-core shield wire, non-polarity) Wire size : 0.75 to 1.25 mm² 2.0 mm²
(Up to 1000 m)
(Up to 2000 m)
yU (v, h, c) line means of control wiring.
Uv line : Between indoor and outdoor units.
Uh line : Central control line.
Uc line : Between outdoor and outdoor units.
yUv line and Uc line are independent from another refrigerant line. Total length of Uv and Uc lines (L3+L4) in each
refrigerant line is up to 1000 m.
[Uh line]
L1 = Up to 2000 m
[Uv and Uc line]
L2 = Up to 1000 m
(L3+L4) = Up to 1000 m
Central control device
Outdoor unit
Indoor unit
Remote controller
<U series>
<U series>*
<U series>*
(SMMS-u)
* Even if the indoor unit and the remote controller are “other than U series”, the wiring
specification are the same.

– 11 –
21-EN 22-EN
Remote controller wiring
• 2-core with non-polarity wire is used for wiring of the remote controller wiring and group remote controllers wiring.
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
CAUTION
yThe remote controller wire (Communication line) and AC 208-240V 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 or other factor.
yIf U series models (TU2C-Link) are combined with models other than U series (TCC-Link), the wiring
specifications and maximum number of connectable indoor units will be changed. Pay attentions to their
communication specifications when carrying out the installation, maintenance, or repair. For its details, refer to the
“Communication line” in 6 Electrical connection.
Indoor unit
Remote
controller
Indoor unit Indoor unit Indoor unit
Remote
controller
wiring
Remote controller inter-unit wiring For number of max. connectable
units, refer to the following table.
LnL2L1
L
Max. number of connectable indoor units, and communication type
Unit type
Outdoor unit U series U series U series U series ½½½½
Indoor unit U series U series ½½
U series U series ½½
Remote controller U series ½U series ½U series ½U series ½
Communication type TU2C-Link TCC-Link
Max. number of connectable
unit 16 8
½: Other than U series
<In the case of combining with outdoor units other than Super Modular Multi System u series (SMMS-u)>
Control wiring between indoor units, and outdoor unit (L2, L3)
(2-core shield wire, non-polarity)
Wire size : 1.25 mm²
2.0 mm²
(Up to 1000 m)
(Up to 2000 m)
Central control line wiring (L1)
(2-core shield wire, non-polarity)
Control wiring between outdoor units (L4)
(2-core shield wire, non-polarity) Wire size : 1.25 to 2.0 mm² (Up to 100 m)
yThe length of the communication line (L1+L2+L3) means the total length of the inter-unit wire length between
indoor and outdoor units added with the central control system wire length.
[Communication line]
(L1+L2+L3) = Up to 2000 m
Central control device
Outdoor unit
Indoor unit
Remote controller
<Other than U series>
<U series>*
<U series>*
(SMMS-i)
(SMMS-e)
(MiNi SMMS)
etc.
* Even if the indoor unit and the remote controller are “other than U series”, the wiring
specification are the same.

Uv(U1) Uv(U2) A B
A
B
A
B
– 12 –
23-EN 24-EN
Terminal block for
remote controller
wiring of indoor unit
Remote controller wire (Locally procured)
Remote
controller
unit
Remote controller wire
Run the remote
controller wire through
the cord clamp.
■Remote controller wiring
Strip off approx. 9 mm the wire to be connected.
Wiring diagram
Terminal block
Remote controller
wire
Electrical control
box cover
P.C. Board
Terminal block
Power supply wire
Power supply wire
Run the power supply
wire here through the
clamp base and fix it
with a cord clamp.
▼Connecting power supply wire and the system interconnection wire
Power supply
terminal block
Interconnection wire / Remote
controller terminal block
System interconnection
wires
Run the system
interconnection wire here
through the clamp base and
fix it with a cord clamp.
◆Wire connection
REQUIREMENT
• Connect the wires matching the terminal numbers. Incorrect connection causes a trouble.
• Pass the wires through the bushing of wire connection holes of the indoor unit.
• Keep a margin (Approx. 100 mm) on a wire to hang down the electrical control box at servicing.
• The low-voltage circuit is provided for the remote controller. (Do not connect the high-voltage circuit)
1Loosen the cover mounting screws (2 positions) of the electrical control box, and then remove the
cover.
2Connect the indoor power supply wire, system interconnection wires and the remote controller wire to
the terminal block of the electrical control box.
3Tighten screws of the terminal block securely, and fix the wires with code clamp attached to the
electrical control box. (Do not apply tension to the connecting section of the terminal block.)
4Mount the cover of the electrical control box so that it does not pinch the wires.
Two screws
2 mm or less
Power supply wire
See the figure on the left
for connecting wires to the
terminal block.
Earth wire
50 mm
30 mm
10 mm
(L)
RS
(N)
10 mm
Power supply wire

– 13 –
25-EN 26-EN
7Applicable controls
■Applicable controls setup
(settings at the site)
Remote controller model name:
RBC-ASCU11-E
Basic procedure
Be sure to stop the air conditioner before making
settings.
(Change the setup while the air conditioner is not
working.)
CAUTION
Set only the Code No. shown in the following table:
Do NOT set any other Code No.
If a Code No. not listed is set, it may not be possible
to operate the air conditioner or other trouble with
the product may result.
1Push and hold menu button and [ ]
setting button simultaneously for
10 seconds or more.
yAfter a while, the display flashes as shown in the
figure. “ALL” is displayed as indoor unit numbers
during initial communication immediately after
the power has been turned on.
Indoor unit No.
REQUIREMENT
When the air conditioner is used for the first time, it will
take some moments after the power has been turned
on before the remote controller becomes available
for operations: This is normal and is not indicative of
trouble.
• Concerning the automatic addresses (The automatic
addresses are set up by performing operations on
the outdoor interface circuit board.)
While the automatic addresses are being set up,
no remote controller operations can be performed.
Setup takes up to 10 minutes (usually about
5 minutes).
• When the power is turned on after automatic address
setup.
It takes up to 10 minutes (usually about 3 minutes)
for the outdoor unit to start operating after the power
has been turned on.
Before the air conditioner was shipped from the
factory, all units are set to [STANDARD] (factory
default). If necessary, change the indoor unit settings.
The settings are changed by operating the wired
remote controller.
* The settings cannot be changed using only a wireless
remote controller, simple remote controller or group
control remote controller by itself so install a wired
remote controller separately as well.
■Wiring between indoor and outdoor units
NOTE
yA wiring diagram below is an example for connection to SMMS-u series. For connecting to other outdoor unit
series, refer to the Installation Manual attached to the outdoor unit to be connected.
▼Wiring example
Outdoor Power supply
380-415V ~, 50 Hz
380V ~, 60 Hz
Outdoor Power supply
380-415V ~, 50 Hz
380V ~, 60 Hz
Circuit breaker Circuit breaker
Earth
terminal
S: The ground of a
shielded wire
S: The ground of a shielded wire
Earth
terminal
Outdoor unit
Header outdoor
Outdoor unit
Follower outdoor
Control wiring between outdoor units (Shield wire)
Control wiring between indoor and outdoor units (Shield wire)
Control wiring between indoor units (Shield wire)
Indoor unit Indoor unit Indoor unit Indoor unit
Earth Earth Earth Earth
Indoor power supply
220-240V ~, 50 Hz
208-230V ~, 60 Hz
Circuit breaker,
Power switch Pull box Pull box Pull box
Group control
Remote controller Remote controller Remote controller
■Address setup
Set up the addresses as per the Installation Manual supplied with the outdoor unit.

– 14 –
27-EN 28-EN
■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 4, specify [01].
• For the [SET DATA] in Procedure 5, select the
SET DATA of filter sign term from the following table.
SET DATA Filter sign term
0000 None
0001 150H
0002 2500H
(Factory default)
0003 5000H
0004 10000H
■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 or other device 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 4, specify [06].
• For the set data in Procedure 5, select the
SET DATA of shift value of detection temperature to
be set up from the following table.
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
■Group control
In a group control, a remote controller can control up to
maximum 8 or 16 units. (Depending on the outdoor unit.)
• For wiring procedure and wiring method of the
individual line (Identical refrigerant line) system, refer
to “Electrical connection” 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 4.
• Select the following data for the SET DATA in
Procedure 5.
SET DATA 0000 0001
Remote controller
sensor
Not used
(factory default) Used
When flashes, the remote controller sensor is
defective.
Select the SET DATA [0000] (not used) or replace the
remote controller.
■Installing indoor unit on high
ceiling
When the height of the ceiling to be installed exceeds
3.5 m, adjustment of air volume is necessary.
Set up the high ceiling.
• Set according to the basic operation procedure
(1→2→3→4→5→6).
• CODE No. in Procedure specifies [5d].
• Select [SET DATA] in Procedure from “List of
installable ceiling height” in this Manual.
• For the CODE No. in Procedure 4, specify [5d].
• For the CODE No. in Procedure 5, select the
SET DATA of ceiling height to be set up from the
table on the below.
Model MMC- UP015 to
UP027
UP036 to
UP056 SET DATA
Standard
(Factory default) Up to 3.5 m Up to 3.5 m 0000
High ceiling (1) Up to 4.0 m Up to 4.3 m 0003
◆Remote controller-less setting
Change the high-ceiling setting with the DIP switch on
the indoor unit P.C. Board.
* Once the setting is changed, setting to 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).
SET DATA SW501-1 SW501-2
0000
(Factory default) OFF OFF
0003 OFF ON
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”.
SW501-2
SW501-1
MCU(IC501)
2Each time [ ] [ ] setting button is
pushed, indoor unit numbers in the group
control change cyclically. Select the
indoor unit to change settings for.
yThe fan of the selected indoor unit runs.
The indoor unit can be confirmed for which to
change settings.
3Push OFF timer button to confirm the
selected indoor unit.
Set data
Code No.
4Push the menu button to make Code No.
[ ] flash. Change Code No. [ ] with
[ ] [ ] setting button.
5Push the menu button to make Set data
[] flash. Change Set data [ ]
with [ ] [ ] setting button.
6Push OFF timer button.
By doing so, the setup is completed.
yTo change other settings of the selected
indoor unit, repeat from Procedure 4.
7When all the settings have been completed,
push ON/OFF button to determine the
settings.
“ ” flashes and then the display content
disappears and the air conditioner enters the
normal stop mode. (The remote controller is
unavailable while “ ” is flashing.)
yTo change settings of another indoor unit, repeat
from Procedure 1.

– 15 –
29-EN 30-EN
Wireless remote controller
NOTE
• Be sure to operate the unit, following the instruction
manual
• Do not run the air conditioner in forced cooling mode
for a long time since it overloads the air conditioner.
• Forced heating is not available for trial runs.
To perform a test run, set the unit to heating mode
with the remote controller. The unit might not
operate in heating mode, however, depending on
temperature conditions.
1Hold down the TEMPORARY button for over
10 seconds. With a beep sound, the unit is set
to the forced cooling mode.
In approximately three minutes, it is forced to start
in cooling mode. Determine that cool air comes
out of the unit. If the unit won’t start, check the
wiring.
2Push the TEMPORARY button again (for about
one second) to stop a trial run.
The upper and lower wind direction changing
blades close, and the unit stops operation.
Checking remote transmission
1. Push the ON/OFF button on the remote controller to
determine that it works properly.
• Pushing the TEMPORARY button once (for about
one second) causes the unit to enter auto operation
mode. Hold down the TEMPORARY button for over
10 seconds to begin forced cooling.
• Even if you select cooling with a remote controller,
the unit does not always perform cooling operation,
depending on temperature conditions. Check the
wiring and piping of the indoor and outdoor units in
forced cooling mode.
TEMPORARY button
■Before test run
• Before turning on the circuit breaker, carry out the
following procedure.
1) By using insulation tester (500V-megger), check
that resistance of 1MΩor more exists between the
terminal block L to N and the earth (grounding).
If resistance of less than 1MΩis detected, do
notrun 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 for operating.
• Before starting a test run, be sure to set addresses
following the Installation Manual supplied with the
outdoor unit.
◆Requirements for turning thermostat OFF
Cooling operation
yWhen the outdoor/suction air temperature is lower than or equal to 19°C.
yWhen the outdoor/suction air temperature is lower than or equal to 3°C above the set temperature.
Heating operation
yWhen the outdoor/suction air temperature is lower than or equal to -10°C
yWhen the outdoor/suction air temperature is higher than or equal to 15°C.
yWhen the outdoor/suction air temperature is higher than or equal to 3°C above the set temperature.
■Execute a test run
yWhen a fan operation is to be performed for an
individual indoor unit, turn off the power, short circuit
CN72 on the circuit board, and then turn the power
back on. (Set the operation mode to “fan” to operate
the unit.) When the test run has been performed
using this method, be sure to release the short circuit
of CN72 after the test run is completed.
Operate the unit with the remote controller as usual.
For the procedure of the operation, refer to the
Owner’s Manual attached to the outdoor unit.
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.
Wired remote controller
Be sure to stop the air conditioner before making
settings.
(Change the setup while the air conditioner is not
working.)
1Push and hold OFF timer button and
[ ] setting button simultaneously for
10 seconds or more. [TEST] is displayed
on the display part and the test run is
permitted.
2Push ON/OFF button.
3Push menu button to select the operation
mode. Select [ Cool] or [ Heat] with
[ ] [ ] setting button, and then push
menu button (three times) again to
determine the operation mode.
yDo not run the air conditioner in a mode other
than [Cool] or [Heat].
yThe temperature setting function does notwork
during test run.
yThe check code is displayed as usual.
4After the test run, push OFF timer button to
stop a test run.
([TEST] disappears on the display and the
air conditioner enters the normal stop mode.)
8Test run

1,7
– 16 –
31-EN 32-EN
▼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.
Parts Inspection method
Heat exchanger Look through the air discharge port to check the part. Examine the heat exchanger if there
is any clogging or damages.
Fan motor Check if any abnormal noise can be heard.
Fan Check if any abnormal noise can be heard.
Filter Go to installed location and check if there are any stains or breaks on the filter.
Drain pan Look through the air discharge port to check the part. Check if there is any clogging or drain
water is polluted.
▼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 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.
Ceiling 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.
Slide
Air intake grille fixing knob
Air filter
Air intake grille
Air filter handle
Air filter
Air filter handle
Air intake grille hook
Air intake grille fixing hook
Air intake grille fixing knob
Air intake grille
Air filter
<Daily maintenance>
▼Cleaning of air filter
• If is displayed on the remote controller, maintain
the air filter.
1Push the button to stop the operation,
then turn off the circuit breaker.
3Take out air filter.
• Push the handle of the air filter, and remove the
hook of the air intake grille. Pull out the air filter
toward you.
4Cleaning with water or vacuum cleaner.
• If dust is heavy, wash it with tepid water
including neutral detergent or water.
• After cleaning with water, dry it completely in the
shade.
5Mount the air filter.
6Close the air intake grille.
• Close the air intake grille, and then fix it securely
while sliding knob closed side (CLOSE).
• Fix the screws of air intake grille fixing knob on a
side of each filter.
7Turn on the circuit breaker, then push the
button on the remote controller to start the
operation.
8After 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.)
2Open the air intake grille.
• Remove the screws of air intake grille fixing
knob on a side of each filter.
• Slide the air intake grille fixing knobs (two
positions) toward the arrow direction (OPEN),
and then open the air intake grille.
9Maintenance

– 17 –
33-EN 34-EN
10 Troubleshooting
Confirmation and check
If a problem occurs with the air conditioner,
the OFF timer indicator alternately shows
the check code and the indoor Unit No.
in which the problem occurred.
Check code The indoor Unit No. in which
the problem occurred.
Troubleshooting history and confirmation
You can check the troubleshooting history with the following procedure if a problem occurs with the air conditioner.
(The troubleshooting history records up to 4 incidents.)
You can check it during operation or when operation is stopped.
yIf you check the troubleshooting history during OFF timer operation, the OFF timer will be canceled.
Procedure Description of operation
1
Push the OFF timer button for over 10 seconds and
the indicators appear as an image indicating the
troubleshooting history mode has been entered.
If [ Service check] is displayed, the mode enters in
the troubleshooting history mode.
y[01: Order of troubleshooting history] appears in the
temperature indicator.
yThe OFF timer indicator alternately shows the
[check code] and the [indoor Unit No. ] in which the
problem occurred.
2
Each time the setting button is pushed, the recorded
troubleshooting history is displayed in sequence.
The troubleshooting history appears in order from [01]
(newest) to [04] (oldest).
CAUTION
In the troubleshooting history mode, DO NOT push
the Menu button for over 10 seconds, doing so
deletes the entire troubleshooting history of the
indoor unit.
3
After you have finished checking, push the ON/OFF
button to return to the regular mode.
yIf the air conditioner is operating, it remains operated
even after the ON/OFF button has been pushed.
To stop its operation, push the ON/OFF button again.

– 18 –
35-EN 36-EN
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.
Check code list
The following list shows each check code. Find the check contents from the list according to part to be checked.
yIn case of check from indoor remote controller: See “Wired remote controller display” in the list.
yIn case of check from outdoor unit: See “Outdoor unit 7-segment display” in the list.
yIn 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
ALT: Flashing is alternately when there are two flashing LED.
SIM: Simultaneous flashing when there are two flashing LED.
Inverter: Compressor / Fan Inverer P.C. Board
I/F : Interface P.C. Board
Check code Wireless remote controller
Check code name Judging device
Wired remote
controller display
Outdoor unit 7-segment display Sensor block display of receiving unit
Auxiliary code Operation Timer Ready Flash
E01 ── Communication trouble between indoor unit and remote controller
(Detected at remote controller side) Remote controller
E02 ── Remote controller transmission trouble Remote controller
E03 ── Communication trouble between indoor unit and remote controller
(Detected at indoor unit side) Indoor unit
E04 ── Communication circuit trouble between indoor / outdoor unit
(Detected at indoor unit side) Indoor unit
E06 E06 No. of indoor units in which sensor has been normally received Decrease of No. of indoor units I/F
─E07 ─Communication circuit trouble between indoor / outdoor unit
(Detected at outdoor unit side) I/F
E08 E08 Duplicated indoor unit addresses Duplicated indoor unit addresses Indoor unit • I/F
E09 ── Duplicated master remote controllers Remote controller
E10 ── Communication trouble between indoor unit MCU Indoor unit
E11 ── Communication trouble between Application control kit and indoor unit Indoor unit
Application control kit
E12 E12 01: Indoor / Outdoor units communication
02: Outdoor / Outdoor units communication Automatic address start trouble I/F
E15 E15 ─No indoor unit during automatic addressing I/F
E16 E16 00: Capacity over
01: No. of connected units Capacity over / No. of connected indoor units I/F
E17 ── Communication trouble between indoor unit and Flow Selector unit Indoor unit
E18 ── Communication trouble between header and follower units Indoor unit Indoor unit
E19 E19 00: Header is not detected
02: Two or more header units Outdoor header units quantity trouble I/F
E20 E20 01: Outdoor unit of other line connected
02: Indoor unit of other line connected Other line connected during automatic address I/F
E23 E23 ─Sending trouble in communication between outdoor units
Trouble in number of heat storage units (trouble with reception) I/F
E25 E25 ─Duplicated follower outdoor addresses I/F
E26 E26 No. of outdoor units which received signal normally Decrease of No. of connected outdoor units I/F
E28 E28 Detected outdoor unit number Follower outdoor unit trouble I/F
E31 E31 *1 Inverter quantity information Inverter communication trouble I/F
F01 ── ALT Indoor unit TCJ sensor trouble Indoor unit
F02 ── ALT Indoor unit TC2 sensor trouble Indoor unit
F03 ── ALT Indoor unit TC1 sensor trouble Indoor unit
F04 F04 ─ALT TD1 sensor trouble I/F
F05 F05 ─ALT TD2 sensor trouble I/F

– 19 –
37-EN 38-EN
Check code Wireless remote controller
Check code name Judging device
Wired remote
controller display
Outdoor unit 7-segment display Sensor block display of receiving unit
Auxiliary code Operation Timer Ready Flash
F06 F06
01: TE1 sensor
02: TE2 sensor
03: TE3 sensor
ALT TE1,TE2 or TE3 sensor trouble I/F
F07 F07
01: TL1 sensor
02: TL2 sensor
03: TL3 sensor
ALT TL1,TL2 or TL3 sensor trouble I/F
F08 F08 ─ALT TO sensor trouble I/F
F09 F09
01: TG1 sensor
02: TG2 sensor
03: TG3 sensor
ALT TG1,TG2 or TG3 sensor trouble I/F
F10 ── ALT Indoor unit TA sensor trouble Indoor unit
F11 ── ALT TF sensor trouble Indoor unit
F12 F12
01: TS1 sensor
03: TS3 sensor
04: TS3 sensor disconnect
ALT TS1 or TS3 sensor trouble I/F
F13 F13 1 ᅷ: Comp. 1 side
2 ᅷ: Comp. 2 side ALT TH sensor trouble Inverter
F15 F15 ─ALT Outdoor unit temp. sensor miswiring (ТЕ, TL) I/F
F16 F16 ─ALT Outdoor unit pressure sensor miswiring (Pd, Ps) I/F
F22 F22 ─ALT TD3 sensor trouble I/F
F23 F23 ─ALT Ps sensor trouble I/F
F24 F24 ─ALT Pd sensor trouble I/F
F29 ── SIM Indoor unit other trouble Indoor unit
F30 F30 ─SIM Occupancy sensor trouble Indoor unit
F31 F31 ─SIM Indoor unit EEPROM trouble I/F
H01 H01 1 ᅷ: Comp. 1 side
2 ᅷ: Comp. 2 side Compressor break down Inverter
H02 H02 1 ᅷ: Comp. 1 side
2 ᅷ: Comp. 2 side Compressor trouble (lock) Inverter
H03 H03 1 ᅷ: Comp. 1 side
2 ᅷ: Comp. 2 side Current detect circuit system trouble Inverter
H04 H04 ─Comp. 1 case thermostat operation I/F
H05 H05 ─TD1 sensor miswiring I/F
H06 H06 ─Low pressure protective operation I/F
H07 H07 ─Oil level down detective protection I/F
H08 H08
01: TK1 sensor trouble
02: TK2 sensor trouble
03: TK3 sensor trouble
04: TK4 sensor trouble
05: TK5 sensor trouble
Oil level detective temp. sensor trouble I/F
H14 H14 ─Comp. 2 case thermostat operation I/F
H15 H15 ─TD2 sensor miswiring I/F
H16 H16
01: TK1 oil circuit system trouble
02: TK2 oil circuit system trouble
03: TK3 oil circuit system trouble
04: TK4 oil circuit system trouble
05: TK5 oil circuit system trouble
Oil level detective circuit trouble I/F
H17 H17 1 ᅷ: Comp. 1 side
2 ᅷ: Comp. 2 side Compressor trouble (Step out) I/F
H25 H25 ─TD3 sensor miswiring I/F
J02 ─Detected indoor unit address T─SIM Communication trouble between control boards in Flow Selector unit Indoor unit