Toshiba MMD-AP0361H, MMY-MAP0801FT8, MMY-MAP1201FT8, MMY-MAP1001FT8 User Manual

SERVICE MANUAL

<OWNER'S MANUAL/INSTALLATION MANUAL>

FILE NO. A04-005

Indoor Unit

<4-way Air Discharge Cassette Type>

MMU-AP0091H, AP0121H, AP0151H,
MMU-AP0181H, AP0241H, AP0271H,
MMU-AP0301H, AP0361H, AP0481H,
MMU-AP0561H

<2-way Air Discharge Cassette Type>

MMU-AP0071WH, AP0091WH, AP0121WH,
MMU-AP0151WH, AP0181WH, AP0241WH,
MMU-AP0271WH, AP0301WH

MMU-AP0481WH (CHINA market only)
<1-way Air Discharge Cassette Type>

MMU-AP0071YH, AP0091YH, AP0121YH,
MMU-AP0151SH, AP0181SH, AP0241SH

<Concealed Duct Standard Type>

MMD-AP0071BH, AP0091BH, AP0121BH,
MMD-AP0151BH, AP0181BH, AP0241BH,
MMD-AP0271BH, AP0301BH, AP0361BH,
MMD-AP0481BH, AP0561BH

<Concealed Duct High Static Pressure Type>

MMD-AP0181H, AP0241H, AP0271H,
MMD-AP0361H, AP0481H

<Under Ceiling Type>

MMC-AP0151H, AP0181H, AP0241H,
MMC-AP0271H, AP0361H, AP0481H

<High Wall Type>

MMK-AP0071H, AP0091H, AP0121H,
MMK-AP0151H, AP0181H, AP0241H

<Floor Standing Cabinet Type>

MML-AP0071H, AP0091H, AP0121H,
MML-AP0151H, AP0181H, AP0241H

<Floor Standing Concealed Type>

MML-AP0071BH, AP0091BH, AP0121BH,
MML-AP0151BH, AP0181BH, AP0241BH

<Floor Standing Type>

MMF-AP0151H, AP0181H, AP0241H,
MMF-AP0271H, AP0361H, AP0481H,
MMF-AP0561H

R410A

PRINTED IN JAPAN, OCT.2004 (TDOC)

Outdoor Unit

Heat Recovery Model

<Inverter Unit>

MMY-MAP0801FT8, MAP1001FT8
MMY-MAP1201FT8

Super Heat Recovery Multi System Air Conditioner

Flow Selector Unit (FS unit)

RBM-Y1121FE
RBM-Y1801FE

The indoor unit in Super Heat Recovery Multi System is common to one in Super Modular Multi System air conditioner.
Therefore refer to the service manuals for A03-011 separately issued.

This Air Conditioner is a new type which adopts a new
refrigerant HFC(R410A) instead of the conventional
refrigerant R22 in order to prevent destruction of the
ozone layer.

ADOPTION OF NEW REFRIGERANT

Thank you very much for purchasing TOSHIBA Air Conditioner.
Please read this manual carefully before using your Air Conditioner.

•Be sure to obtain the "Owner’s manual" and "Installation manual"

constructor (or dealer).
Request to constructor or dealer
Please clearly explain the contents of the Owner’s manual
and hand over it.

PRECAUTIONS FOR SAFETY

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1

NAME OF EACH PART

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PARTS NAME OF REMOTE CONTROLLER

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CORRECT USAGE

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ADJUSTMENT OF WIND DIRECTION

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TIMER OPERATION

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INSTALLATION

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MAINTENANCE

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AIR CONDITIONER OPERATIONS AND PERFORMANCE

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RE-INSTALLATION

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WHEN THE FOLLOWING SYMPTOMS ARE FOUND

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Outdoor Unit

OWNER’S MANUAL

INSTALLATION MANUAL [ VOLUME-1

]

ACCESSORY PARTS

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SAFETY CAUTION

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1 INSTALLATION OF NEW REFRIGERANT AIR CONDITIONER

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2 SELECTION OF INSTALLATION PLACE

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3 OUTDOOR UNIT CARRYING IN

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4 INSTALLATION OF OUTDOOR UNIT

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5 REFRIGERANT PIPING

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INSTALLATION MANUAL [ VOLUME-2

]

6 ELECTRIC WIRING

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7 ADDRESS SETUP

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8 TEST OPERATION

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9 TROUBLESHOOTING

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60

Flow Selector Unit

INSTALLATION MANUAL

CONTENTS

Accessory parts and Parts to be procured locally

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1 PRECAUTIONS FOR SAFETY

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2 INSTALLATION OF NEW REFRIGERANT AIR CONDITIONER

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3 SELECTION OF INSTALLATION PLACE

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4 INSTALLATION OF FLOW SELECTOR UNIT

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5 REFRIGERANT PIPING

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6 ELECTRIC WORK

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PRECAUTIONS FOR SAFETY

Outdoor Unit / OWNER'S MANUAL

WARNING

Warning on installation

Be sure to leave the installation work to the dealer or a store
specializing.

The exclusive knowledge and technology are required for installation work.
Do not perform installation by yourself. If an incomplete installation is performed,

a fire, electric shock, injury, or water leakage may be caused.

Be sure to use the products sold separately which are specified by us.

For the products sold separately, be sure to use those specified by us. Otherwise,
a fire, electric shock, or water leakage ma y be caused. For installation work, leav e
it to special engineer.

When installing the units in a small room, take measures so that the
refrigerant will not exceed the critical concentration if it leaks.

CAUTION

Related to countermeasures against the critical concentration, perform the installation work upon consul­tation with the dealer. If the refrigerant leaks and exceeds the critical concentration, oxygen deficiency
may be caused.

Check whether earthing work is performed correctly.

A grounding is necessary. If the earthing work is incompletely, an electric shock ma y be caused.
(For details, conform to the local regulation in each area.)

Warning on use

Do not expose your body directly in cool air for a long time, or do
not cool you excessively.

It causes the worse of physical condition or trouble on health.

Never insert a finger or bar into the air inlet port or air outlet port of air.

Since the fan rotates in high speed inside of the unit, an injury may be caused.

When a trouble (burnt smell, etc.) is felt, stop the operation, turn off
the power switch, and contact the dealer who you have purchased
the air conditioner.

If keeping operation as the air conditioner is defective, a fire, electric shock, or
trouble may be caused.

Do not use “Super HRM” for other than personal usage where the
ambient temperature may go down below –5°C.

For e xample , O A equipment/Electric device/Food/Animals and plants/Art object.

Warning on moving/repair

Never modify the air conditioner.

A fire or electric shock may be caused.

For repair, leave it to the dealer which you have purchased the air
conditioner.

If an incomplete repair is performed, a fire or electric shock may be caused.

When moving or re-installing the air conditioner, contact the dealer
which you have purchased the air conditioner or the special engi­neer.

If an incomplete installation is performed, a fire, electric shock, injury, or water
leakage may be caused.

1

CAUTION

Outdoor Unit / OWNER'S MANUAL

Caution on installation

Check the drain pipes are installed so that they can drain water
securely.

If the piping is incomplete, water leakage occurs resulted in moisture on
furniture.

Check the earth leakage breaker is attached.

It is necessary to attach an earth leakage breaker. Otherwise, it causes an
electric shock.

Check the air conditioner is installed at a place where flammable
gas will not leak.

If gas leaks and accumulates in the unit surroundings, an outbreak of fire may
be caused.

Check the outdoor unit is fixed on the base.

If it is not fixed securely on the base, an accident such as falling may be
caused.

Check fixing method

Do not clean the air conditioner with water.

An electric shock may be caused.

ENGLISH

Do not put the combustible devices at a place where air from the
air conditioner flows directly.

Imperfect comb ustion of the combustible devices may be caused.

Diligently ventilate the room when operating the air conditioner
with the combustible devices.

If ventilation is incomplete, shortage of oxygen ma y be caused.

Check the installation plate, etc. is not damaged by use for a long
time.

If leaving them damaged, the unit ma y fall resulted in injury, etc.

Do not put plants and animals at a place where air from the air
conditioner flows directly.

Cause to affect on plants and animals ma y gener ate.

Do not put flammable spray, etc. near the air conditioner, or do not
spray directly on the air conditioner.

A fire may be caused.

Do not put vessels including water such as a vase on the unit.

Moisture floods in the unit, the electric isolation deteriorates, and an electric
shock may be caused.

Do not handle the switches with wet hands.

An electric shock may be caused.

2

NAME OF EACH PART

Outdoor Unit / OWNER'S MANUAL

Sold Separately Parts

Outdoor unit

Air inlet

They are provided at front,
rear, left, and right sides.

Fixing leg

Indoor unit

[4-way Air Discharge Cassette Type]

Air outlet/Air outlet flap

Select air blow direction in cooling or
heating operation each.

Earth screw

It is included in the electric
parts box.

Clip

The clip is to open/close the
air inlet grille.

2-way discharge/3-way discharge

2-way discharge or 3-way discharge can be
selected according to the shape or
arrangement of the room.
For details, consult with the dealer which you
have purchased the air conditioner.

Air outlet (Discharge)

Hot air is discharged when
cooling operation is performed.
Cold air is discharged when
heating operation is performed.

Power source hole

Refrigerant pipe connecting hole

Connecting valve is included
inside here.

Air filter

Removes dust and trash.
(Air filter is provided in the air grille.)

Air inlet grille

Air in the room is sucked from here.

RBC-AMT21E

Wired remote controller

TEST

SETTING

SET DATA

SETTING

CODE No.

UNIT No.

R.C. No.

TEST

UNIT

CL

SET

˚C

[2-way Air Discharge Cassette Type]

Earth screw

It is included in the electric parts box.
Center panel

Air inlet

Air in the room is
sucked from here.

Air outlet/Air outlet flap

Select air blow direction in cooling or
heating operation each.

Air filter

Removes dust and trash.
(Air filter is provided in the center panel.)

[1-way Air Discharge Cassette Type]
MMD-AP0071YH to AP0121YH MMD-AP0151SH to AP0241SH

Air outlet/

Select air blow direction in
cooling or heating operation each.

Earth screw

It is included in the electric
parts box.

Air outlet flap

Earth screw

It is included in the electric parts box.

Air outlet/

Air outlet flap

Select air blow direction in cooling
or heating operation each.

RBC-AS21E

Simple wired remote controller

Air inlet grille

Air in the room is sucked from here.

Air filter

Removes dust and trash.
(Air filter is provided in the air inlet grille.)

Air inlet grille

Air in the room is sucked
from here.

Air filter

Removes dust and trash.
(Air filter is provided in the air inlet grille.)

3

Wireless remote controller kit

TCB-AX21E RBC-AX21CE RBC-AX22U(W)-E

[Concealed Duct Type]

Outdoor Unit / OWNER'S MANUAL

Air outlet flange

Discharge duct is connected.

Air filter

Removes dust and trash.
(Air filter is provided in the air inlet grille.)

Air inlet

Air in the room is sucked from here.

[Concealed Duct, High Static Pressure Type]

Air outlet

Discharge duct is connected.

Earth screw

Earth screws are provided in the electric parts box.

[Under Ceiling Type]

Earth screw

Earth screws are provided in
the electric parts box.

Air inlet

Suction duct is connected.

Drain pan

PROGRAM1

PROGRAM2

PROGRAM3

WEEKLY TIMER

Weekly timer

RBC-EXW21E

ALL
ZONE
GROUP

1234

SET DATA

SETTING

SELECT ZONE

TCB-SC642TLE

Central remote controller

SuMoTuWeTh Fr Sa

ERROR

ZONE

TEST

UNIT No.

No.

R.C.

CL

SET

GROUP

CODE

No.

Button

Button to open/close the
suction port

Air filter

Removes dust or trash.
(Provided on the suction port.)

[High Wall Type]

Air inlet grille

Air in the room is sucked from here.

Air filter

Removes dust and trash.
(Air filter is provided in
the air inlet grille.)

Air inlet port

The air in the room is sucked in
from this port.

Earth screw

Earth screws are provided in the
electric parts box.

Air outlet/Air outlet flap

Change the direction of the air to
be discharged according to
cool/heat mode.

Earth screw

Earth screws are provided
in the electric parts box.

Air outlet/Air outlet flap

Change the direction of the air to
be discharged according to
cool/heat mode.

4

[Floor Standing Cabinet Type]

Outdoor Unit / OWNER'S MANUAL

Air filter

Removes dirt or dust.
(It is included in the suction port.)

[Floor Standing Concealed Type]

Air outlet/Air outlet flap

Exchanges the air direction according to
cooling or heating time.

Earth screw

It is prepared in the electric parts box.

Air inlet port

Sucks air inside of the room from here.

Air outlet port

Earth screw

It is prepared in the electric parts box.

Air inlet port

Sucks air inside of the room from here.

Front panel (Lower side)

[Floor Standing Type]

Horizontal flap/Air outlet port

Exchanges the air direction according
to cooling or heating time.

Air inlet port

Sucks air inside of the room from here.

Air filter

Removes dirt or dust.

Drain pan (With drain filter)

This accessory is installed at the local site.

Air filter

Removes dirt or dust.
(It is included in the suction port.)

Fixing metal holder

Vertical flap

The air can be automatically discharged
rightward/leftward at stated periods.

Drain pan

Water accumulated in the drain pan is
drained from here through the drain pipe.

Earth screw

It is prepared in the electric parts box.

Fixing metal holder (Right and left)

5

PARTS NAME OF REMOTE CONTROLLER

Outdoor Unit / OWNER'S MANUAL

Display section

In the display example, all indicators are displayed for the explanation.
In reality only, the selected contents are indicated.

• When turning on the leak breaker at the first time, [SET DATA] flashes on

the display part of the remote controller. While this display is flashing, the
model is being automatically confirmed. Accordingly, wait for a while after
[SET DATA] display has disappeared, and then use the remote controller.

1

8

2

CODE No.

4

3
5

SET DATA

SETTING

TEST

UNIT No.

R.C. No.

6

7

1

SET DATA display

Displayed during setup of the timer.

2

Operation mode select display

The selected operation mode is displayed.

3

CHECK display

Displayed while the protective device works or
a trouble occurs.

4

Timer time display

Time of the timer is displayed.
(When a trouble occurs, the check code is
displayed.)

5

Timer SETIN setup display

When pushing the Timer SETIN button, the
display of the timer is selected in order of
[OFF]
[ON]

6

Filter display

If “FILTER ” is displayed, clean the air
filter.

7

TEST run display

Displayed during a test run.

8

Flap position display
(for 4-Way Air Discharge Cassette Type
and Under Ceiling Type model only)

Displays flap position.

9

SWING display

Displayed during up/down movement of the
flap.

10

Set up temperature display

The selected set up temp. is displayed.

11

Remote controller sensor display

Displayed while the sensor of the remote
controller is used.

→ [OFF] repeat OFF timer →

→ No display.

12

PRE-HEAT display

Displayed when the heating operation starts or
defrost operation is carried out.

While this indication is displayed, the indoor fan
stops or the mode enters in LOW.

13

Operation ready display

Displayed when cooling or heating operation is
impossible because the outdoor temperature goes
out of the operable range.

14

No function display

Displayed if there is no function even if the button is
pushed.

15

Air volume select display

The selected air volume mode is displayed.
(AUTO)

(MED.) (LOW)
In the Concealed Duct High Static Pressure type

models, [HIGH] only is
displayed for the air speed.

16

Mode select control display

Displayed when pushing “Operation mode select”
button while the operation mode is fixed to heating
or cooling by the system manager of the air condi­tioner.

17

Central control display

Displayed when using the remote controller together
with the central control remote controller, etc.
If Remote controller is prohibited at the
centralcontrol side,

, ,

the change is not accepted.
(The contents available to be set up on the remote
controller differ according to the central control
mode. For details, refer to Owner’s Manual of the
central control remote controller.)

SET DATA

SETTING

TEST

CL

SET

CODE No.

UNIT No.

R.C. No.

UNIT

16

17

9

10

11

12

13

14

15

(HIGH)

flashes when operating

/

buttons and

Display
section

Operation
section

6

Operation section

Outdoor Unit / OWNER'S MANUAL

Push each button to select a desired operation.
This remote controller can operate the maximum 8 indoor units.

• The details of the operation needs to be set up once, afterward, the air conditioner can be used by pushing

button only.

1

7

8

2
4

3

5

SET

UNIT

CL

9

10

6

1

Air volume select button

Selects the desired air volume mode.
The Concealed Duct High Static Pressure type

models cannot be operated.

2

Timer set button

TIMER SET button is used when the timer is
set up.

3

Check button

The CHECK button is used for the check
operation. During normal operation, do not
use this button.

4

Fan button

FAN button is used when a fan which is sold on
the market or etc. is connected.

• If is displayed on the remote controller

when pushing the FAN button, a fan is not
connected.

5

Filter reset button

Resets (Erases) “FILTER ” display.

7

Operation lamp

Lamp is lit during the operation. Lamp is off
when stopped.

Although it flashes when operating the protec­tion device or abnormal time.

8

When the button is pushed, the operation
starts, and it stops by pushing the button
again.

When the operation has stopped, the operation
lamp and all the displays disappear.

9

Operation select button

Selects desired operation mode.

10

Set up temperature button

Adjusts the room temperature.
Set the desired set temperature by pushing

button

or .

6

Wind direction and Swing

:

UNIT

If the multiple indoor units are operated by only
one remote controller, select the units when
the air direction is adjusted.

:

Set up the auto swing and angle of the flap.

• This function is not provided to Concealed

Duct Standard Type, High Static Pressure
Type, Floor standing Cabinet Type, or Floor
Standing Concealed Type.

Remote controller sensor

Usually the TEMP. sensor of the indoor unit senses
the temperature. The temperature on the surround­ing of the remote controller can also be sensed.
For details, contact the dealer from which you have
purchased the air conditioner.

• In case that one remote controller controls the

multiple indoor units, the setup operation is
unavailable in group control.

7

CORRECT USAGE

Outdoor Unit / OWNER'S MANUAL

When you use the air conditioner for the first time or when you change the SET DATA value, follow the proce­dure below. From the next time, the operation displayed on the remote controller will start by pushing the

button only.

Preparation

Turn on the main power switch and/or the leakage breaker.

• When the power supply is turned on, a partition line is displayed on the display part of the remote controller.

After the power supply is turned on, the remote controller does not accept an operation for approx. 1 minute,

*

but it is not a failure.

REQUIREMENT

• While using the air conditioner, operate it only with button without turning off the main

power switch and the leak breaker.

• Do not turn off the leak breaker while the air conditioner is used.

• Turn on the leak breaker 12 hours or more before start of operation after the air conditioner has stopped

for a long time.

1

3

2

UNIT

CL

SET

1

Push button.

The operation lamp goes on, and the operation starts.

2

Select an operation mode with the button.

One push of the button, and the display
changes in the order shown on the right.

•“DRY” function is not provided to

Concealed Duct High Static Pressure Type.

3

Select air volume with button.

One push of the button, and the display changes in the order shown on the right.

• When air volume is “AUTO ”, air volume differs according to the temperature difference between

set temperature and room temperature.

• In DRY mode, “AUTO ” is displayed and the air volume is LOW.

• In heating operation, if the room temperature is not heated sufficiently with volume “LOW ” operation,
select “MED. ” or “HIGH ” operation.

• The temperature which the temperature sensor detects is one near the air inlet of the indoor unit.

Therefore it slightly differs from the room temperature according to the installation status. The setup
value is a criterion of the room temperature. (Automatic air speed cannot be selected in FAN mode.)

• Air volume of function is not provided to “Concealed Duct High Static Pressure Type” but air speed
“HIGH ” only is displayed.

AUTO

HEAT DRYAUTO COOL FAN

4

(Dehumidity)

LOW MED. HIGH

4

Determine the set up temperature by pushing the “TEMP. ” or “TEMP. ” button.

Stop

Push button.

The operation lamp goes off, and the operation stops.

8

REQUIREMENT

Outdoor Unit / OWNER'S MANUAL

[In Cooling operation]

• The operation starts after approx. 1 minute.

[In Heating operation]

• In heating operation, the fan operation may continue for approx. 30 seconds after the air conditioner has

stopped.

• The indoor fan continues preheat operation for 3 to 5 minutes under stop condition, and then blows out

the hot air.
( display on the remote controller display part goes on.)

• When temperature of the room has reached the setup temperature and the outdoor unit stops, the air

speed becomes super low and the air volume extremely is lessened.

• In the defrost mode, the fan stops so that cool air is not discharged and PRE-DEF is displayed.

[In Automatic operation]

• Using the difference between the setup temperature and the room temperature, the heating or cooling

operation is automatically performed.

ADJUSTMENT OF WIND DIRECTION

To increase the cooling or heating effect, be sure to use the discharge flap in the different
directions in cooling or heating operation.

As the characteristics of the air, the cold air accumulates at lower side and hot air at upper side, respectively.

CAUTION

Set the discharge flap horizontally in cooling operation.

If cooling operation is performed with downward discharge, the surface of the discharge port or louver will
be wet with dew, and dewdrop may fall down.

REQUIREMENT

• If heating operation is performed with horizontal discharge, unevenness of temperature may increase in

the room.

4-way Air Discharge Cassette Type

• While the air conditioner stops, the discharge flap automatically directs downward.

• While the air conditioner is in ready status for heating,
the discharge flap directs upward.
The swinging operation starts after heating ready status
has been cleared, but “SWING
remote controller even if the status is ready to heating.

” is displayed on the

[In Cooling operation]

Use the discharge flap with horizontal set point.

[In Heating operation]

Use the discharge flap with downward set point.

9

How to set up the air direction

Outdoor Unit / OWNER'S MANUAL

Push button.

1

Every pushing the button, the air direction changes.

In Heating operation

Set the air outlet flap downward.
If directing it upward, the hot air may not come to the foot.

In Cooling / Dry operation

Set the air outlet flap upward.
If directing it downward, the dew may fall on near the air discharge port or it drips.

How to start swinging

2

Push button.
Set direction of the air outlet flap to the
lowest position and then push button
again.

• [SWING ] is displayed and the air direction

automatically changes upward/downward.
In case when one remote controller controls

the multiple indoor units, each indoor unit can
be selected and its air direction can be set up.

SET

Initial setup

Initial setup

UNIT

CL

How to stop swinging

3

Push button again during swinging
of the air outlet flap.

• The air outlet flap can be stopped at the

desired position. After then the air direction
can be again set up from the uppermost
position by pushing button.

* While the air outlet flap is set downward in

cooling/drying operation, it does not stop.
If stopping the air outlet flap which directs
downward during swinging, it stops after
moving to the 3rd position from the top
position.

4

UNIT

• To set up the air direction individually, push

button to display each indoor unit No.

UNIT

in a group control. Then set up the air direction
to a displayed indoor unit.

• If there is no display, all the indoor units can be

operated collectively.

• Every pushing

exchanges as shown in the figure.

UNIT

button, the display

1, 2, 3 4

In FAN operation

Initial setup

Display when stopping the swing

Fan/Heat
operation

Unit No. 1-1No display Unit No. 1-2

Unit No. 1-4 Unit No. 1-3

In all modes

Series of
operation

Cool/Dry
operation

10

According to the shape or arrangement of the room, the cold air and hot air can be discharged for two direc-

Outdoor Unit / OWNER'S MANUAL

tions or three directions. For details, contact the dealer.

INFORMATION

• If cooling operation is performed with downward discharge, dew may fall on surface of the cabinet or the

horizontal flap resulted in dripping.

• If heating operation is performed with horizontal discharge, unevenness of temperature may increase in

the room.

• Do not move the horizontal flap directly with hands; otherwise a trouble is caused. Select direction of the

horizontal flap using flap operation switch on the remote controller. The horizontal flap does not stop
immediately even if the switch is pushed. Adjusting the stop position, push the switch.

2-way Air Discharge Cassette Type

[In Cooling operation]

Use the air outlet flap with horizontal set point.

[In Heating operation]

Use the air outlet flap with downward set point.

Setup of air direction and swinging

1

Push button during operation.

• [SWING ] is displayed and the air direction automatically changes upward/downward.

In case when one remote controller controls the multiple indoor units, each indoor unit can be selected
and its air direction can be set up.

2

Push button again during swinging of the air
outlet flapp.

• The air outlet flap can be stopped at the desired

position.

3

UNIT

• To set up the air direction individually, push

button to display each indoor unit No. in a group
control. Then set up the air direction to a displayed
indoor unit.

• If there is no display, all the indoor units can be oper-

ated collectively.

• Every pushing

as shown in the figure.

button, the display exchanges

UNIT

UNIT

1-way Air Discharge Cassette Type

Adjustment of air direction upward/downward

[In Cooling operation]

In cooling operation, use the air outlet flap with horizontal set point so that the
cold air diffuses in whole room.

[In Heating operation]

In heating operation, use the air outlet flap with downward set point so that
the hot air blows at the foot.

UNIT

CL

SET

1, 2 3

Unit No. 1-1No display Unit No. 1-2

Unit No. 1-4 Unit No. 1-3

Adjustment of air direction rightward/leftward

To change the discharge direction to right or left side, set the vertical grille
inside of the air outlet flap to the desired direction.

Setup of air direction and swinging

Refer to description of “2-way Air Discharge Cassette Type”.

11

Under Ceiling Type

Outdoor Unit / OWNER'S MANUAL

• While the air conditioner stops, the horizontal flap (Up/Down air direction adjustment plate)
automatically directs upward.

• While the air conditioner is in ready status for heating, the horizontal flap (Up/Down air direc­tion adjustment plate) directs upward. The swinging operation starts after heating ready status
has been cleared, but “SWING

” is displayed on the remote controller even if the status is

ready to heating.

How to set up the air direction

Push button during operation.

1

Every pushing the button, the air direction changes.

In Heating operation

Set the horizontal flap (Up/Down
air direction adjustment plate)
downward. If directing it upward,
the hot air may not come to the
foot come to the foot.

Initial setup

How to start swinging

2

Push button.
Set direction of the horizontal flap (Up/Down air
direction adjustment plate) to the lowest posi­tion and then push button again.

• [SWING ] is displayed and the air direction

automatically changes upward/downward.
In case when one remote controller controls the

multiple indoor units, each indoor unit can be
selected and its air direction can be set up.

How to stop swinging

3

Push button again during swinging of
the horizontal flap.

• The horizontal flap can be stopped at the desired

position. After then the air direction can be again
set up from the uppermost position by pushing

button.

* While the horizontal flap is set downward in

cooling/drying operation, it does not stop.
If stopping the horizontal flap which directs
downward during swinging, it stops after moving
to the 3rd position from the top position.

In Cooling / Dry operation

Set the horizontal flap (Up/Down
air direction adjustment plate)
upward. If directing it downward,
the dew may fall on near the air
air outlet port or it drips.

UNIT

CL

SET

1, 2, 3 4

In FAN operation

Initial setup

Display when stopping the swing

Initial setup

In all modes

Series of
operation

4

UNIT

• To set up the air direction individually, push

UNIT

a group control. Then set up the air direction to a
displayed indoor unit.

• If there is no display, all the indoor units can be

operated collectively.

• Every pushing

exchanges as shown in the figure.

button to display each indoor unit No. in

button, the display

UNIT

Unit No. 1-1No display Unit No. 1-2

Unit No. 1-4 Unit No. 1-3

12

Fan/Heat
operation

Cool/Dry
operation

Right/Left air direction adjustment

Outdoor Unit / OWNER'S MANUAL

To change the air outlet direction to right or left side, set the vertical flap inside of the horizontal flap to the
desired direction.

INFORMATION

• If cooling operation is performed with downward discharge,

dew may fall on surface of the cabinet or the horizontal flap
resulted in dripping.

• If heating operation is performed with horizontal discharge,

unevenness of temperature may increase in the room.

High Wall Type

Adjustment of air direction upward/downward

[In Cooling operation]

In cooling operation, use the horizontal flap with horizontal
set point so that the cold air diffuses in whole room.

[In Heating operation]

In heating operation, use the horizontal flap with downward
set point so that the hot air blows at the foot.

REQUIREMENT

• If cooling operation is performed with downward air outlet, dew may fall on surface of the cabinet or the

horizontal flap resulted in dripping.

• If heating operation is performed with horizontal air outlet, unevenness of temperature may increase in

the room.

• Do not move the horizontal flap directly with hands; otherwise a trouble is caused. Select direction of the

horizontal flap using switch on the remote controller. The horizontal flap does not stop immedi­ately even if the switch is pushed. Adjusting the stop position, push the switch.

Adjustment of air direction rightward/leftward

To change the air outlet direction to right or left side, set the vertical
flap inside of the horizontal flap to the desired direction.

Setup of air direction and swinging

Refer to description of “2-way Air Discharge Cassette Type”.

13

Floor Standing Cabinet Type

Outdoor Unit / OWNER'S MANUAL

[In Cooling operation]

In cooling operation, use the air outlet flap with horizontal set
point so that the cold air diffuses in whole room.

[In Heating operation]

In heating operation, use the air outlet flap with downward set
point so that the hot air blows at the foot.

How to change the air outlet port

Change the air outlet port in the following procedure.

1

Take off two fixing screws of the air outlet port.
(The fixing screws are reused.)

2

Insert the hand into the air outlet port and push up it
a little, and then remove the air outlet port from the
claw hook at rear side.

3

Lift up the air outlet port upward and remove it.

4

Reverse the air outlet port and attach it to the main
unit.

Pay attention so that four claw hooks (two at rear and
lower sides each) are hooked at mounting position.

5

Be sure to tighten the air outlet port with the re­moved fixing screws so that the air outlet port does
not come off.

14

Floor Standing Type

Outdoor Unit / OWNER'S MANUAL

Adjustment of air direction upward/downward

[In Cooling operation]

In cooling operation, move the flap with hands and use it with horizontal air outlet
point so that the cold air diffuses in whole room.

[In Heating operation]

In heating operation, move the flap with hands and use the horizontal flap with
downward set point so that the hot air blows at the foot.

Adjustment of air direction rightward/leftward

[In case of using unsymmetrical air directions]

Lift up the vertical flap lightly, direct it toward the desired
direction, and lower it.

In this case, do not use the Swing function.

2

1

[In case of automatic swing]

1

Push button during operation.

• [SWING ] is displayed and the air direc-

tion automatically changes rightward/
leftward.

In case when one remote controller controls
the multiple indoor units, each indoor unit
can be selected and its air direction can be
set up.

2

Push button again during swinging
of the vertical flap.

• The vertical flap can be stopped at the

desired position.

3

Swing button

• To set up the air direction individually, push

UNIT

No. in a group control. Then set up the air
direction to a displayed indoor unit.

• If there is no display, all the indoor units can

be operated collectively.

• Every pushing

exchanges as shown in the figure.

UNIT

button to display each indoor unit

UNIT

button, the display

In this case, do not use the
swing function.

UNIT

CL

SET

1, 2 3

Unit No. 1-1No display Unit No. 1-2

Unit No. 1-4 Unit No. 1-3

• If cooling operation is performed with downward air outlet, dew may fall on surface of the cabinet or the

horizontal flap resulted in dripping.

• If heating operation is performed with horizontal air outlet, unevenness of temperature may increase in

the room.

• Do not move the flap directly with hands during swing operation; otherwise a trouble is caused.

The vertical flap does not stop immediately even if the button is pushed. Adjusting the stop
position, push the button.

INFORMATION

15

TIMER OPERATION

Outdoor Unit / OWNER'S MANUAL

A type of timer operation can be selected from the following three types.
OFF timer : The operation stops when the time of timer has reached the set time.
Repeat OFF timer : Every time, the operation stops after the set time has passed.
ON timer : The operation starts when the time of timer has reached the set time.

Timer operation

1

UNIT

2

1

Push TIMER SET button.

• The timer display (type) changes for every

push of the button.

• SET DATA and display flashes.

2

Push to select “SET TIME”.

For every push of button, the set time increases in the unit of 0.5 hr (30 minutes).
The maximum set time is 72.0 hr.
For every push of button, the set time decreases in the unit of 0.5 hr (30 minutes).
The minimum set time is 0.5 hr.

3

Push SET button.

• SET DATA display disappears and display goes on.

SET

3

CL

4

OFF

(OFF timer) (Repeat OFF timer)

OFF ON

(ON timer)

No display

(When ON timer is activated, time is displayed, and after time of the timer has been up, displays other
than ON disappear.)

Cancel of timer operation

4

Push CL button.

• TIMER display disappears.

• When the operation stops after the timer reached the preset time, the Repeat OFF timer resumes the

operation by pushing button and stops the operation after the time of the timer has reached
the set time.

NOTICE

16

INSTALLATION

Outdoor Unit / OWNER'S MANUAL

Installation location

WARNING

• Select a location for installation that will be able to safely bear the weight of the unit.

If the installation location is not strong enough to support the unit and the unit falls, injury could result.

CAUTION

• Do not install the unit in a location where combustible gases could conceivably leak.

Leaking gases that accumulate in the vicinity of the unit could be ignited by the unit.

REQUIREMENT

• A location that permits level installation of the unit

• A location that provides enough space to service the unit safely

• A location where water draining from the unit will not pose a problem

Avoid the following types of locations :

• Locations where salt is present in large amounts (seaside areas), or where sulfuric gases are present in

large amounts (hot springs areas)
(If the unit is to be used in such areas, special maintenance is necessary.)

• Locations that generate oils (including machine oils), steam, oily smoke, or corrosive gases

• Locations where organic solvents are used

• Locations in the vicinity of equipment that generates high frequency signals

• Locations where the outdoor unit will blow in the direction of a neighbor's window

• Locations where the noise of the outdoor unit will pose a problem

• Locations with poor air circulation

Electric wiring

WARNING

Check that earthing practice is correctly performed.

Grounding is necessary. If earthing practice is incomplete, an electric shock may be caused.

CAUTION

Check the circuit breaker is fitted.

Attaching the earth leakage breaker is necessary. Otherwise, an electric shock may be caused.

Make sure that correct capacity Fuses are used.

Using wire or copper wire may cause a fire or trouble.
For the power supply, use a circuit with rated voltage exclusive for air conditioner.

To disconnect the appliance from the main power supply.

This appliance must be connected to the main power supply by means of circuit breaker or a switch with a
contact separation of at least 3mm.

17

MAINTENANCE

Outdoor Unit / OWNER'S MANUAL

Cleaning of air filter

• When [FILTER] is displayed on the remote controller, maintain the air filter.

• Clogging of air filter decreases cooling/heating effect.

CODE No.

FILTER display

Notifies the time to clean the air filter.

FILTER reset

Push the FILTER switch after cleaning.
“FILTER” display disappears.

SET DATA

SETTING

SET

TEST

UNIT No.

R.C. No.

UNIT

CL

WARNING

Be sure to turn off the main power switch prior to the maintenance.

• Please do not intend to do the daily maintenance and/or Air Filter cleaning by yourself.

Cleaning of the air filter and other parts of the air filter involves dangerous work in high places, so be
sure to have a service person do it. Do not attempt it yourself.

<Daily maintenance>

• For daily maintenance including Air Filter cleaning, make sure to ask the qualified service person particu­larly following models;

4-way Air Discharge Cassette Type Concealed Duct Type
2-way Air Discharge Cassette Type Concealed Duct, High Static Pressure Type
1-way Air Discharge Cassette Type Under Ceiling Type

2-way Air Discharge

Cassette Type

Concealed Duct Type

4-way Air Discharge

Cassette Type

Under Ceiling Type

18

1-way Air Discharge

Cassette Type

Concealed Duct,

High Static Pressure Type

High Wall Type

Outdoor Unit / OWNER'S MANUAL

• Push the projection at the center of air filter. Clip is out.

• Undo the clip of air filter, pull the air filter downward while

pushing it toward the main unit side.

Floor Standing Cabinet Type

• Push down the upper part of the suction port a little,

and then pull toward you to remove it.

• Take out the air filter inside of the suction port.

Floor Standing Concealed Type

• Push down hook of the air filter on the front panel

(Lower side).

• Pull the air filter toward you to remove it.

Floor Standing Type

Removal / Attachment of air filter

• Pull the air filter toward you.

• To attach the air filter, insert it into the main body and push in it.

Push the air filter,
and pull it downward.

Front panel
(Lower)

Air filter knob

NOTE

• For cleaning of air filter, use a cleaner or brush clean. If stain is heavy,

it is effective to wash the air filter in tepid water mixed with neutral detergent.

• After washing, rinse it well, and dry it in the shade.

• Install again the air filter which has been cleaned.

Cleaning of main unit / remote controller

CAUTION

• Wipe them with soft and dry cloth.

• A cloth dampened with cold water may be used on the indoor

unit if it is very dirty.

• Never use a damp cloth on the main unit and remote controller.

• Do not use a chemically-treated duster for wiping or leave such

materials on the unit for long. It may damage or fade the sur­face of the unit.

• Do not use benzine, thinner, polishing powder, or similar sol-

vents for cleaning. These may cause the plastic surface to
crack or deform.

Polishing

powder

Benzene

Thinner

Chemical
floor-cloth

Do not use.

19

If you do not plan to use the unit for more than 1 month

Outdoor Unit / OWNER'S MANUAL

(1) Operate the fan for 3 to 4 hours to dry inside the unit

• Operate “FAN” mode.

(2) Stop the air conditioner and turn off the main power switch

or the circuit breaker.

I will wipe soft
and dry cloth!

Checks before operation

(1) Check that the air filters are installed.
(2) Check that the air outlet or inlet is not blocked.
(3) Turn on the main power switch or the circuit breaker for the

main power supply to the air conditioner.

Use after drying

when it has not been

used for a long time!

NOTE

For Air conditioning system which is operated regularly, cleaning and maintenance of the indoor/outdoor
units are strongly recommended.
As a general rule, if an indoor unit is operated for about 8 hours daily, the indoor/outdoor units will need to
be cleaned at least once every 3-MONTH. This cleaning and maintenance shall be carried out by a
qualified person.
Failure to clean the indoor/outdoor units regularly will result in poor performance, icing, water leaking and
even compressor failure.

HINTS FOR ECONOMICAL OPERATION

Maintain room temperature at comfortable level
Clean air filters

The clogged air filter impairs the performance of the air conditioner.

Never open doors and windows more often than necessary

To keep cool or warm air in the room, never open doors and
windows more often than necessary.

Window curtains

In cooling, close the curtains to avoid direct sunlight.
In heating, close the curtains to keep the heat in.

Get uniform circulation of room air

Adjust the air flow direction for the even
circulation of room air.

Please close

Clean, please.

Blows upward

Cool and
dry air

Gee, chilly

Control

Air flow adjustment

Warm
air

Blows downward

20

AIR CONDITIONER OPERATIONS AND PERFORMANCE

Outdoor Unit / OWNER'S MANUAL

Check before operation

• Check whether earth wire is disconnected or out of place.

• Check that air filter is installed to the indoor unit.

Heating capacity

• For heating, a heat pump system which sucks in outside heat air
and discharges it into the room is adopted.
If temperature of the outside air lowers, the heating capacity decreases.

• When temperature of the outside air is low, it is recommended to use other heating equipment together.

Turn on the power switch
12 hours or more before
starting before operation.

WARNING

Defrost operation during heating operation

• If the outdoor unit has some frost during heating operation, the operation mode changes automatically to
defrost mode to increase the heating effect (for approx. 2 to 10 minutes).

• During defrost operation, fans of the indoor and the outdoor units stop.

Protection for 3 minutes

• The outdoor unit does not operate for approx. 3 minutes after air conditioner has been immediately restarted
after stop, or power switch has been turned on. This is to protect the system.

Main power failure

• If a power failure occurred during the operation, all operations stop.

• When restarting the operation, push ON/OFF button again.

Fan rotation of stopped unit

• While other indoor units operate, the fan on indoor units on “stand-by” rotates to protect the machine once
per approx. 1 hour for several minutes.

Protective device (High pressure switch)

The high pressure switch stops the air conditioner automatically when excessive load is applied to the air
conditioner.

If the protective device works, the operation lamp keeps lit but the operation stops.
When the protective device works, check characters “ ” in the remote controller display part flash.

The protective device may work in the following cases.

• When suction or discharge port of the outdoor unit closed.

• When strong wind blows continuously against discharge port of the outdoor unit.

• When dust or dirt is excessively adhered to air filter of the indoor unit.

• When discharge port of the indoor unit is blocked.

Cooling/heating operation of Heat Recovery Multi air conditioner

• When the outdoor temperature goes out of the operable range, cooling or heating operation may not be
performed in order to protect the equipment. In this case, “ ” goes on.

Characteristics of heating operation

• Hot air is not out immediately after the operation has started. After 3 to 5 minutes (differs according to room
or outside temperature) has passed and the indoor heat exchanger has been warmed up, hot air blows out.

• During operation, the outdoor unit may stop if outside temperature becomes high.

• When other outdoor unit performs heating operation while the fan is operating, the fan operation may be

stopped temporarily to prevent blowing of hot air.

Characteristics of cooling/heating simultaneous operation

• If the outdoor temperature drops during operation, the fan of the outdoor unit may stop.

21

Air conditioner operating conditions

Outdoor Unit / OWNER'S MANUAL

For proper performance, operate the air conditioner under the following temperature conditions:

Cooling Outdoor temperature : –5°C to 43°C (Dry-bulb temp.)
operation

Heating Outdoor temperature : –15°C to 21°C (Dry-bulb temp.), –15°C to 15.5°C (Wet-bulb temp.)
operation

• If air conditioner is used outside of the above conditions, safety protection may work.

* Do not use “Super HRM” for other than personal usage where the ambient temperature may go down below

–5°C. (For example, OA equipment/Electric device/Food/Animals and plants/Art object)

Room temperature : 21°C to 32°C (Dry-bulb temp.), 15°C to 24°C (Wet-bulb temp.)

CAUTION

Room temperature : 15°C to 28°C (Dry-bulb temp.)

Room relative humidity – less than 80 %. If the air conditioner operates
in excess of this figure, the surface of the air conditioner may cause dewing.

CAUTION

When outdoor temperature goes out of specified range, “ or ” mark is indicated on the Wired remote
controller display and required operation will stop.

“ & ” : When heating operation. “ ” : When cooling operation.

Notice :

• This indication is not failure.

• When outdoor temperature goes back to specified range, “ or ” disappear and start normal operation.

• Operation stops because concurrent operation can not be kept in the condition of out of specification for

Super HRM.
(Outdoor temp. (DB) < –5°C : Cooling, > 21°C : Heating)

RE-INSTALLATION

DANGER

Ask the dealer or an installation professional to re-install the air conditioner to a new place or
move it to another place and to observe the following items.

If the air conditioner is inappropriate installed by yourself, it may cause electric shock or fire.

Do not install the air conditioner in the following places

• Do not install the air conditioner in any place within 1 m from a TV, stereo, or radio set. If the unit is installed in

such place, noise transmitted from the air conditioner affects the operation of these appliances.

• Do not install the air conditioner near a high frequency appliance (sewing machine or massager for business

use, etc.), otherwise the air conditioner may malfunction.

• Do not install the air conditioner in a humid or oily place, or in a place where steam, soot, or corrosive gas is

generated.

• Do not install the air conditioner in a salty place such as seaside area.

• Do not install the air conditioner in a place where a great deal of machine oil is used.

• Do not install the air conditioner in a place where it is usually exposed to strong wind such as in seaside area or

on the roof or upper floor of a building.

• Do not install the air conditioner in a place where sulfureous gas generated such as in a spa.

• Do not install the air conditioner in a vessel or mobile crane.

Be careful with noise or vibrations

• Do not install the air conditioner in a place where noise by outdoor

unit or hot air from its air outlet annoys your neighbors.

• Install the air conditioner on a solid and stable foundation so that it

prevents transmission of resonating, operation noise and vibration.

• If one indoor unit is operating, some sound may be audible from

other indoor units that are not operating.

22

WHEN THE FOLLOWING SYMPTOMS ARE FOUND

Outdoor Unit / OWNER'S MANUAL

Check the points described below before asking repair servicing.

Symptom

Outdoor unit • White misty cold air or

water is out.

• Sometimes, noise
“Pushu !” is heard.

Indoor unit •“Swish” sound is

heard sometimes.

• Slight “Pishi!” sound is
heard.

• Discharge air smells.

” indication is lit.

•“

It is not a failure.

• Sound or cool air is
output from the stand
by indoor unit.

• When power of the air
conditioner is turned
on, “Ticktock” sound is
heard.

Cause

• Fan of the outdoor unit stops automatically and performs defrost

operation.

• Solenoid valve works when defrost operation starts or finishes.

• When the operation has started, during the operation, or immedi-

ately after the operation has stopped, a sound such as water flows
may be heard, and the operation sound may become larger for 2 or
3 minutes immediately after the operation has started. They are
flowing sound of refrigerant or draining sound of dehumidifier.

• This is sound generated when heat exchanger, etc. expand and

contract slightly due to change of temperature.

• Various smell such as one of wall, carpet, clothes, cigarette, or

cosmetics adhere to the air conditioner.

• Do not the outdoor temperature go out of the specified range?

• When the manager of the air conditioner has fixed the operation to

COOL or HEAT, and an operation contrary to the setup operation is
performed.

• When fan operation stopped to prevent discharge of hot air.

• Since refrigerant is flowed temporarily to prevent stay of oil or

refrigerant in the stand by indoor unit, sound of flowing refrigerant,
“Kyururu” or “Shaa” may be heard or white steam when other indoor
unit operates in HEAT mode, and cold air in COOL mode may be
blow-out.

• Sound is generated when the expansion valve operates when

power has been turned on.

Operates or stops automatically.

Does not operate.

Silent

Air is not cooled or warmed sufficiently.

Check again.

It’s strange.

• Is the timer “ON” or “OFF”?

• Is it a power failure?

• Is the power switch turned off?

• Is the power fuse or breaker blown?

• Has the protective device operated? (The operation lamp goes on.)

• Is the timer “ON”? (The operation lamp goes on.)

• Do not the outdoor temperature go out of the specified range?

• Is the suction port or discharge port of the outdoor unit obstructed?

• Are any door or window open?

• Is the air filter clogged with dust?

• Is discharge louver of the indoor unit set at appropriate position?

• Is air selection set to “LOW” “MED”, and is the operation mode set
to “FAN”?

• Is the setup temp. the appropriate temperature?

• Do not the outdoor temperature go out of the specified range?

When the following symptoms are found, stop the operation immediately, turn off the power switch, and
contact the dealer which you have purchased the air conditioner.

• Activation of switch is unstable.

• The main power fuse often blows out, or circuit breaker is often activated.

• Foreign matters or water entered by mistake.

• When if activation cause of the protective device has been removed, the operation is not performed.

• Other unusual status occurred.

23

Confirmation and check

Outdoor Unit / OWNER'S MANUAL

When a trouble 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
history” for confirmation.

Confirmation of error history

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

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

3

Check code

UNIT No.

R.C. No.

Indoor unit No. in which
an error occurred

UNIT

CL

SET

CODE No.

2

Procedure

1

2

1

Description

When pushing
for 4 seconds or more, the following display appears.

If [Service check] is displayed, the mode enters in the
trouble history mode.

• [01 : Order of trouble history] is displayed in CODE No.

window.

• [Check code] is displayed in CHECK window.

• [Indoor unit address in which an error occurred] is

displayed in UNIT No.

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

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

CAUTION

Do not push

and buttons at the same time

SET

button because all the trouble history of the indoor unit will be deleted.

CL

CODE No.

UNIT No.

R.C. No.

3

1. Check the troubles according to the above procedure.

2. Ask an authorized dealer or qualified service (maintenance) professional to repair or maintain the air
conditioner.

3. More details of the service code are explained in Service Manual.

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

24

ACCESSORY PARTS

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

r Accessory parts

MMY-

Part name

Installation Manual 2 2 2
Owner’s Manual 1 1 1 — (Be sure to handover to customers.)

Attached pipe 1 1 —

Attached pipe —— 1

Attached pipe —— 1

Attached pipe 1 1 1

Attached pipe 1 1 1

Attached pipe 1 1 1

MAP0801FT8 MAP1001FT8 MAP1201FT8

Q’ty

Shape Use

Volume-1
Volume-2

(Be sure to handover to customers.)

Suction gas pipe Ø25 to Ø22 special-form connecting pipe
(For drawing out forward, downward)

Suction gas pipe Ø25 to Ø28.6 special-form connecting pipe
(For drawing out forward)

Suction gas pipe Ø25 to Ø28.6 special-form connecting pipe
(For drawing out downward)

Discharge gas pipe Ø15.9 to Ø19.1 special-form conn ec tin g
pipe (For drawing out forward)

Discharge gas pipe Ø15.9 to Ø19.1 special-form conn ec tin g
pipe (For drawing out downward)

Liquid pipe Ø12.7 connecting pipe
(For drawing out forward)

n This air conditioner requires the indoor unit, remote controller, Flow selector unit, and

Y-shape branching joint or branching header. Select one according to the capacity.

SAFETY CAUTION

• Please read this “Safety Cautions” thoroughly before installation to install the air conditioner
and flow selector correctly.

• The important contents concerned to the safety are described in the “Safety Cautions”.
Be sure to keep them. For Indications and their meanings, see the following description.

n Explanation of indications

WARNING

Indicates possibilities that a death or serious injury of personnel is caused by an incorrect handling.

CAUTION

Indicates contents that an injury (∗1) or property damage (∗2) only may be caused when an incorrect work has
been executed.

∗1 : “Injury” means a hurt, a burn, or an electric shock which does not require hospitalization or a long-term going to

the hospital.

∗2 : “Property damage means an enlarged damage concerned to property, or breakage of materials.

• After installation work has finished, check there is no trouble by a test operation, and explain
using method and maintenance method to the customers based on the Owner’s Manual.

Please ask the customers to keep this Installation Manual together with the Owner’s Manual.

25

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

WARNING

Ask a shop or a professional dealer to install the air conditioner.

If you will install by yourself, a fire, an electric shock, or water leak is caused.

Using the tool or piping materials exclusive to R410A, install the air conditioner surely
according to this Installation Manual.

The pressure of the used HFC system R410A refrigerant is higher approx. 1.6 times of that of the former refrigerant.
If the exclusive piping materials are not used, or there is imperfection in installation, a crack or an injury is
caused and also a water leak, an electric shock, or a fire may be caused.

Take measures so that the refrigerant does not exceed the limit concentration even if it leaks
when installing the air conditioner in a small room.

For the measures not to exceed the limit of concentration, contact the dealer. If the refrigerant leaks and it
exceeds the limit of concentration, an accident of oxygen shortage is caused.

Install the air conditioner at a place which is satisfactorily bearable to weight.

If strength is insufficient, the unit may fall down resulting in human injury.

Perform a specified installation work against a strong wind such as typhoon or earthquake.

If the air conditioner is imperfectly installed, an accident by falling or dropping may be caused.

If refrigerant gas leaks during installation work, ventilate the room.

If the leaked refrigerant gas approaches to fire, noxious gas may generate.

After installation work, confirm that refrigerant gas does not leak.

If refrigerant gas leaks in the room, and approaches to fire such as fan heater, stove or kitchen range,
generation of noxious gas may be caused.

ENGLISH

Never recover refrigerant in the outdoor unit.

Be sure to use a refrigerant recovery device to recover refrigerant in reinstallation or repair work.
Recovery of refrigerant in the outdoor unit is unavailable; otherwise a serious accident such as crack or human
injury is caused.

A person qualified for the electric work should deal with the electric construction conforming
to the regulations of the local electric company and the Installation Manual. Be sure to use the
exclusive circuit.

If there is capacity shortage of the power supply circuit or incomplete installation, a fire or an electric shock is
caused.

For cabling, use the specified cables and connect them securely so that external force of
cable does not transmit to the terminal connecting section.

If connection or fixing is incomplete, a fire, etc may be caused.

Be sure to connect earth wire.

Do not connect earth wire to gas pipe, water pipe, lightning rod, nor earth wire of telephone.
If grounding is incomplete, an electric shock is caused.

CAUTION

Do not install the air conditioner at a place where combustible gas may leak.

If gas leaks and is collected at surrounding the unit, the production of fire may be caused.

Be sure to attach an earth leakage breaker; otherwise an electric shock may be caused.
Using a torque wrench, tighten the flare nut in the specified method.

If the flare nut is exceedingly tightened, the flare nut is broken and a refrigerant leakage may be caused after a
long time has passed.

26

1

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

INSTALLATION OF NEW REFRIGERANT AIR CONDITIONER

This air conditioner adopts the new HFC refrigerant (R410A) which does not deplete the ozone layer.

• R410A refrigerant is apt to be affected by impurity such as water, oxidizing membrane, or oils because the
pressure of R410A refrigerant is higher than that of the former refrigerant by approx. 1.6 times. Accompanied with
adoption of the new refrigerant, refrigerating oil has been also changed. Therefore pay attention so that water,
dust, former refrigerant, or refrigerating oil does not enter into the refrigerating cycle of the new refrigerant air
conditioner during installation work.

• To prevent from mixing of refrigerant or refrigerating oil, the size of charge port of the main unit or connecting
section of installation tool differs from that of the air conditioner for the former refrigerant. Accordingly the
exclusive tools are required for the new refrigerant (R410A) as shown below.

• For connecting pipes, use the new and clean piping materials so that water or dust does not enter.

Required tools and cautions on handling

It is necessary to prepare the tools and parts as described below for the installation work.
The tools and parts which will be newly prepared in the following items should be restricted to the exclusive use.

Explanation of symbols

: Newly prepared (It is necessary to use it properly exclusive to R410A separated from those for R22 or R407C.)

l

¡ : Former tool is available.

Used tools

Gauge manifold
Charging hose
Charging cylinder
Gas leak detector
Vacuum pump
Vacuum pump with counter-

flow preventive adapter
Flare tool
Bender
Refrigerant recovery device
Torque wrench
Pipe cutter

Refrigerant cylinder

Welding machine/
Nitrogen gas cylinder

Usage

Vacuuming or charging of
refrigerant and operation check

Charges refrigerant
Checks gas leak
Vacuum drying

Vacuum drying

Flare processing of pipes
Bending processing of pipes
Recovers refrigerant
Tightens flare nut
Cuts pipes

Charges refrigerant

Welding of pipes

Proper use of tools/parts

Newly prepared, Exclusive to R410A

l

Newly prepared, Exclusive to R410A

l

Unusable (Use the Refrigerant charging balance.)

Newly prepared

l

Usable if a counter-flow preventive adapter is attached

: R22 (Existing article)

¡

: Usable by adjusting size

¡

: R22 (Existing article)

¡

Exclusive to R410A

l

Newly prepared, exclusive to Ø12.7mm and Ø15.9mm

l

: R22 (Existing article)

¡

Exclusive to R410A

l

ID : Refrigerant name entered

: R22 (Existing article)

¡

Refrigerant charging balance

Charges refrigerant

: R22 (Existing article)

¡

27

2

(Rear side)

(Front side)

(A case of 3 units are installed.)

500mm or more

500mm or more

10mm
or more

10mm
or more

20mm or more

20mm or more

Air outlet

Air inlet

Air inlet

Outdoor unit top view

Installation work/
servicing surface

Square hole for handling

Air inlet

Air inlet

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

SELECTION OF INSTALLATION PLACE

WARNING

Install the air conditioner certainly at a place bearable to weight.

If strength is insufficient, the unit may fall down resulting in human injury.

CAUTION

Do not install the air conditioner at a place where combustible gas may leak.

If gas leaks and is collected at surrounding the unit, the production of fire may be caused.

Upon customer’s approval, install the air conditioner at a place where satisfies the following
conditions.

• Place where it can be installed horizontally.

• Place which can reserve a sufficient service space for safe maintenance or check.

• Place where there is no problem even if the drained water flows.

Apply electric insulation between metal section of the building and metal section of the air
conditioner in conformance with the Local Regulation.

Avoid the following places.

• Salty place (seaside area) or place with much gas sulfide (hot spring area)

(If selecting such a place, a special maintenance is required.)

• Place where oil (including machine oil), steam, oil smoke or corrosive gas generates.

• Place where a device generating high frequency (inverter, non-utility generator, medical apparatus, or

communication equipment) is set. (A bad influence may generate by malfunction of the air conditioner, control
error, or noise for such equipment.)

• Place where discharged air of the outdoor unit blows against windows of neighbor.

• Place where operation sound of the outdoor unit transmits.

(Especially at the boundary line with neighbor, install the air conditioner considering the noise.)

• Place unbearable to weight of the unit.

• Place with ill ventilation.

Installation space

Considering functions, reserve space necessary for installation work and servicing.

NOTES)

∗1 : If there is an obstacle at the upper side of the outdoor unit, reserve

a space by 2000mm or more to the top end of the outdoor unit.

∗2 : Arrange the height of obstacle around two outdoor units up to

below 800mm from the bottom end of the outdoor unit.

28

Plaster

Rope

Plaster

Square hole for handling

Reinforcing plate

Forklift Forklift

2

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

SELECTION OF INSTALLATION PLACE

Equipments

Equivalent HP

Model name
Cooling capacity (kW) 22.4 28.0 33.5
Heating capacity (kW) 25.0 31.5 35.5

8 HP 10 HP 12 HP

MMY-MAP0801FT8 MMY-MAP1001FT8 MMY-MAP1201FT8

Appearance

Inverter unit

3

Handle the outdoor unit in care with the following items.

1. When using a forklift, etc for loading/unloading in transportation, insert pawl of the forklift into the

2. When lifting up the unit, insert a rope sufficiently bearable to unit mass into the square hole for handling,

OUTDOOR UNIT CARRYING IN

square hole for handling as shown below.

and cord the unit from four sides. (Apply a plaster to position where rope fits outdoor unit itself so that
flaw or deformation does not generate on the outer surface of the outdoor unit.)
(There provided the reinforcing plates on the side surfaces, so the rope cannot be passed.)

29

4

20

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

INSTALLATION OF OUTDOOR UNIT

WARNING

Perform a specified installation work against a strong wind such as typhoon or earthquake.

If the air conditioner is imperfectly installed, an accident by falling or dropping may be caused.

Install the air conditioner certainly at a place bearable to weight.

If strength is insufficient, the unit may fall down resulting in human injury.

Drain water is discharged from the outdoor unit. (Especially in heating time)

Install the outdoor unit at a place where has good drainage.

For installation, be careful to the strength and the level of the foundation so that an abnormal
sound (Vibration, noise) does not generate.

Snowfall-hood

In the snowfall area, apply the following measures against
snowfall for the outdoor unit. (See the figure on the right.)
(Incomplete snowfall-proof measures causes a trouble.)

Place a higher stool under the unit, and mount the
snowfall-hoods to air inlet and air outlet so that
snows do not have influence.
(For the above works, please arrange at the field.)

for air outlet

Snowfall-hood
for air inlet
(4 faces)

Stool

1. To install the multiple outdoor units, arrange them with
20mm or more intervals.

Fix each outdoor unit with M12 anchor bolts at 4 positions.
Length by 20mm is appropriate for an anchor bolt.

• Anchor bolt pitch is as shown below:

310 or more

700 700

*

Continuous hole
(15 x 20 long hole)

700

310 or more

M12 anchor bolt
4 positions/unit

755

Space for draining

20mm or more 20mm or more

2. When drawing out the refrigerant pipe from underside, set
height of the stool by 500mm or more.

30

500mm or more

4

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

INSTALLATION OF OUTDOOR UNIT

3. Do not use four stools to set the four corners.

4. Mount the vibration-proof rubber (vibration-proof block etc.) so that it catch whole the clamping leg.

Install the vibration-proof rubber so that

Anchor bolt

bent part of the fixing leg is grounded.

Vibration-proof rubber

Bent part of the fixing
leg is not grounded.

31

5

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

REFRIGERANT PIPING

WARNING

If the refrigerant gas leaks during installation work, ventilate the room.

If the leaked refrigerant gas comes to contact with a fire, the noxious gas may generate.

After installation work, check that the refrigerant gas does not leak.

If the refrigerant gas leaks in the room and comes to contact with a fire such as fan heater, stove, or kitchen
range, the noxious gas may generate.

Connection of refrigerant pipe

1. The refrigerant pipe connecting section is set in the outdoor unit. Remove the front panel and the piping/wiring
panel. (M5: 9 pcs.)

• As shown in the right figure, the hooking hooks are attached at right and left sides each on the front panel.

Lift up and remove the front panel.

2. Pipes can be drawn out forward and downward from the outdoor unit.

3. When drawing out the pipe forward, draw out the pipe to outside via piping/wiring panel, and keep space of
500mm or more from the main pipe connecting the outdoor unit with the indoor unit, considering service work,
etc. (For replacing the compressor, 500mm or more space is required.)

4. When drawing out the pipe downward, remove the knockout of the base plate of the outdoor unit, apply the pipe
to outside of the outdoor unit, and perform piping at right/left or rear side. Leading pipe of the balancing should
be within 4m.

Hook

Packed valve at
suction gas side

Packed valve
at liquid side

Packed valve at balance side
(It is not used in this model.)

Ball valve at discharge gas side

(Left piping)

500mm

or more

Drawing out
forward

(Left piping)

(Right
piping)

Drawing out
downward

Front panel

Piping/wiring panel

(Rear piping)

(Right piping)

REQUIREMENT

For brazing, be sure to use nitrogen gas to avoid oxidation of pipe inside.

1. In a welding work for the refrigerant pipes, be sure to use the nitrogen gas in order to prevent oxidation inside
of the pipes; otherwise clogging of the refrigerating cycle due to oxidized scale generates.

2. Use clean and new pipes for the refrigerant pipes and perform piping work so that water or dust is not mixed.

3. Be sure to use a double spanner to loosen or
tighten the flare nut. If a single spanner is used, a
required tightening cannot be obtained. Tighten
the flare not with the specified torque.

Outer dia. of copper pipe

12.7 mm

15.9 mm

Tightening torque (N•m)

50 to 62 (5.0 to 6.2 kgf-m)
68 to 82 (6.8 to 8.2 kgf-m)

32

5

L-shape pipe

L-shape pipe

Attached pipe

Attached pipe

Socket

Socket

Pipe

Pipe

Pipe

Pipe

Pipe

Attached
pipe

Cut

Suction gas pipe

Suction gas pipe

Discharge
gas pipe

Liquid pipe

Suction gas pipe

Discharge
gas pipe

Liquid pipe

Cut

Suction gas pipe

Socket

Pipe

Attached pipe

L-shape pipe

L-shape pipe

Attached pipe

Attached pipe

Socket

Socket

Socket

Socket

Pipe

Pipe

Pipe

Pipe

Pipe

Pipe

Attached
pipe

Attached pipe

Attached pipe

Cut

Suction gas pipe

Suction gas pipe

Discharge
gas pipe

Liquid pipe

Suction gas pipe

Discharge
gas pipe

Liquid pipe

Cut

Suction gas pipe

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

REFRIGERANT PIPING

Pipe connecting method of valve (Example)

Using the attached pipes as shown in the following figure, braze elbows, sockets, and pipes which are procured locally.

MMY- Drawing out forward Drawing out downward

Pipe connection at the local site
(Bend rightward slightly.)

Use the attached pipe (Straight pipe) and connect it
with socket.

Cut L-shape pipe and connect it with attached pipe
and socket.

MAP0801FT8
MAP1001FT8

Liquid pipe Use the attached pipe for connection.

Discharge gas pipe

Suction gas pipe

Use the attached pipe (L-shape) and connect it with
socket.

Cut L-shape pipe and connect it with elbow, attached
pipe and socket.

Liquid pipe Use the attached pipe for connection.

Discharge gas pipe Use the attached pipe and connect it with socket.

Suction gas pipe Cut L-shape pipe and connect it with attached pipe.

MAP1201FT8

Pipe connection at the local site
(Bend rightward slightly.)

Use the attached pipe (Straight pipe) and connect it
with socket.

Cut L-shape pipe and connect it with attached pipe
and socket.

• Extruding margin of copper pipe with flare machining : B (Unit: mm)

Copper pipe outer dia.

R410A tool used Conventional tool used

Rigid (Clutch type)

Imperial (Wing nut)

B

12.7

15.9

∗ When using the conventional flare tool, to

connect R410A pipes with flaring, make a
margin approx. 0.5mm longer than that of R22
pipe so that the flare size matches with the
specified one. It is convenient to use a copper
pipe gauge for size adjustment of the extruding
margin.

0 to 0.5 1.0 to 1.5

• Extruding margin of copper pipe with flare tools :
A (Unit: mm)

Copper pipe outer dia.

12.7

15.9

33

2.0 to 2.5

A

16.6

19.7

+0.0
–0.4

A

• Coupling size of brazed pipe

q

q

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

Connected section

External size Internal size

K

G

ØF

Standard outer dia. of

connected copper pipe

ØC

External size Internal size

Standard outer dia. (Allowable difference)

CFKG

6.35 6.35 (±0.03) 6.45 (

9.52 9.52 (±0.03) 9.62 (

12.70 12.70 (±0.03) 12.81 (

15.88 15.88 (±0.03) 16.00 (

19.05 19.05 (±0.03) 19.19 (

22.22 22.22 (±0.03) 22.36 (

28.58 28.58 (±0.04) 28.75 (

Selection of pipe materials and size

• Selection of pipe material

Material: Phosphorus deoxidation seam-less pipe

Connected section

+0.04

) 7 6 0.06 or less 0.50

–0.02
+0.04

) 8 7 0.08 or less 0.60

–0.02
+0.04

) 9 8 0.10 or less 0.70

–0.02
+0.04

) 9 8 0.13 or less 0.80

–0.02
+0.03

) 11 10 0.15 or less 0.80

–0.03
+0.03

) 11 10 0.16 or less 0.82

–0.03
+0.06

) 13 12 0.20 or less 1.00

–0.02

Min. depth

of insertion

Oval value

(Unit: mm)

Min. thickness

of coupling

• Capacity code of indoor and outdoor units

• For the indoor unit, the capacity code is decided at each capacity rank.

• The capacity codes of the outdoor units are decided at each capacity rank. The maximum No. of connectable

indoor unit and the total value of capacity codes of the indoor units are also decided.

Compared with the capacity code of the outdoor unit, the total value of capacity codes of the connectable indoor

 

units differs based on the height difference between the indoor units.

 
 

• When height difference between the indoor units is below 15m: Up to 135% of capacity code of the outdoor unit

 

(in case of MMY-MAP1201FT: 120% or less)

 
 

• When height difference between the indoor units is over 15m: Up to 105% of capacity code of the outdoor unit

Table 1

Indoor unit

capacity rank

007 type 0.8 2.2
009 type 1 2.8
012 type 1.25 3.6
015 type 1.7 4.5
018 type 2 5.6
024 type 2.5 7.1
027 type 3 8
030 type 3.2 9
036 type 4 11.2
048 type 5 14
056 type 6 16

Capacity code

uivalent toHPEquivalent to

E

capacity

Table 2

Outdoor unit

model name

MMY-MAP0801FT8 8 22.4 13 5.6 15.7 10.8 30.2

MMY-MAP1001FT8 10 28.0 16 7.0 19.6 13.5 37.8

MMY-MAP1201FT8 12 33.5 16 8.4 23.5 14.4 40.2

Capacity code

E

uivalent toHPEquivalent to

capacity

No. of

indoor units

Total capacity code of connectable indoor units

Min Max.

Equivalent

to HP

Equivalent

to capacity

Equivalent

to HP

Equivalent
to capacity

34

5

g

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

REFRIGERANT PIPING

No. Piping parts Name Selection of pipe size

Outdoor unit



↓

1st branching joint

Branching section



↓

Branching section

Outdoor unit
main pipe

Branching pipe

1) Connecting pipe outdoor unit

Model name Suction gas side Discharge gas side Liquid side

MMY-MAP0801FT8 Ø22.2 Ø19.1 Ø12.7
MMY-MAP1001 FT 8 Ø22.2 Ø19.1 Ø12.7
MMY-MAP1201 FT 8 Ø28.6 Ø19.1 Ø12.7

2) Pipe size between branching sect i ons

Tot al capacity codes of indoor units

at downstream side

Equivalent to

capacity

Below 18.0 B elo w 6.4 Ø15.9 Ø12.7 Ø9.5

18.0 to below 34.0 6.4 to belo w 12.2 Ø22.2 Ø19.1 Ø12.7

34.0 to below 45.5 12.2 to below 16.2 Ø28.6 Ø22.2 Ø15.9

∗

If exceeding the main pipe size, decide the size same to main pipe

Equivalent

to HP

Suction

gas side

size.

∗

When two pipes are used for the circuits exclusive to cooling, use
pipes at liquid and suction gas sides.

End branching



section

↓

Flow selector unit

Connecting pipe
of flow selector
unit

3) Pipe size between end branching section and flow select or unit

Total capacity codes of indoor units

at downstream side

Equivalent to capacity Equivalent to HP

Below 4.5 Below 1.7 Ø12.7 Ø9.5 Ø6.4

4.5 to below 18.0 1.7 to below 6.4 Ø15.9 Ø12.7 Ø9.5

Discharge

gas side

Suction
gas side

Liquid side

Remarks

Same to connecting
pipe size of outdoor unit

Pipe size differs based
on total capacity code
value of indoor units at
downstream side.

If the total value
exceeds the capacity
code of the outdoor unit,
apply capacity code of
the outdoor unit.
(See tables 1 and 2.)

Discharge

gas side

Liquid side

Branching section



or flow selector

Connecting pipe
of indoor unit

unit

↓

Indoor unit

Branching section



Branchin
of Y-shape
branching joint

Branching Flow selector unit



header

4) Connecting pipe si ze of indoor unit

Capacity rank Gas side Liquid side

007 to 012 type

∗

When pipe length between the end branching section and cooling-only indoor unit exceeds 15m,

Real length: Below 15m Ø9.5

Real length: Over 15m
015 to 018 type Ø12.7
024 to 056 type Ø15.9 Ø9.5

∗

Ø12.7

Ø6.4

decide pipe size at gas side to the bigger one with Ø12.7.

5) Selection of branc hi ng joint/header

Total capacity codes of indoor units Model name RBM-

Equivalent to

capacity

Y-shape branching joint

∗

1 For branc hi ng pi pe of the 1st branching section, select one by the outdoor unit capacity code.

∗

2 When total capacity codes of indoor units exceed capacity code of outdoor unit, select one by

1, 2

∗

Branching header

1, 2, 3

∗

Below 18.0 Below 6.4 BY53FE BY53E

18.0 to below 40.0 6.4 to below 14.2 BY103 FE BY103E
Below 40.0 Belo w 14.2 HY1043FE HY104 3E
Below 40.0 Belo w 14.2 HY1083FE HY108 3E

Equivalent to HP For 3

pipes piping

For 2

pipes piping

capacity code of outdoor unit.

∗

3 1 line after header branching is connectable up to total maximum capacity codes 6.0

(Equivalent to HP).

6) S el ection of flow selector unit

Model name Capacity rank of connectable indoor unit

RBM-Y1121FE 007 to 030 type

RBM-Y1801FE 036 to 056 type

∗

Confirm also Installation Manual of flow selector unit.

35

Minimum wall thickness for R410A application

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

Soft Half Hard or Hard OD (Inch) OD (mm) Minimum wall thickness (mm)

OK OK 1/4” 6.35
OK OK 3/8” 9.52
OK OK 1/2” 12.70
OK OK 5/8” 15.88
NG OK 3/4” 19.05
NG OK 7/8” 22.20
NG OK 1.1/8 ” 28.58

Outdoor unit

1st
branching
section

Liquid pipe

Suction gas pipe

Discharge gas pipe

1

5

For three pipes piping

2
3

6

4

Indoor unit

0.80

1.00

5

For two pipes piping

2

3

6

4

2

3

6

4

4

<Cooling

only>

4

<Cooling

only>

FS unit

5

For three pipes piping

2

3

6

4

3 3

6

4

4

Indoor unit Indoor unit

5

For two pipes piping

2

6

4

<Cooling only>

4

<Cooling only>

FS unit

[NOTE] :

Don’t connect two or more indoor units to one FS unit. Arrange one indoor unit and one FS unit set to 1 by 1.

36

5

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

REFRIGERANT PIPING

Allowable length of refrigerant pipe and height difference

Outdoor unit

Main
piping

L1

1st branching
section

Height difference
between outdoor unit
and indoor unit

50 m

H1
(Outdoor at upper side)

Branching pipe L2

Connecting piping of indoor unit L7

a

g

L3

Equivalent length corresponded to farthest piping L

Equivalent length corresponded to farthest piping after 1st branching Li

Y-joint

Indoor unit

L4

d

FS unit FS unit FS unit

l

Indoor unit

b

h

L5

e

m

Branching

header

c

ijk

L6

f

no

• Allowable length/height difference of the refrigerant pipe

FS unitFS unitFS unit

<Cooling only>

125 m

50 m

<Cooling only>

<Cooling only>

p

<Cooling only>

Height difference
between indoor units
H2 35 m
(Outdoor at upper side)

Allowable

value

Total extended pipe length
(Liquid pipe/real length)

250m

Farthest equivalent piping length L (*1) 125m L1 + L3 + L4 + L5 + L6 + p

Pipe
length

Max. equivalent length of main pipe 85m L1
Farthest equivalent piping length from 1st branch Li (*1) 50m L3 + L4 + L5 + L6 + p
Farthest equivalent piping length between indoor unit and end

branching section

30m a + g, b + h, c + i, d + l, e + m, f + n, j, k, o, p.

Max. real length between flow selector unit and indoor unit 15m g, h, i, l, m, n

Height difference between

indoor unit and outdoor unit
Height
difference

Height difference between

indoor units

Outdoor at upper side 50m ——

H1

Outdoor at lower side 30m ——
Outdoor at upper side 35m ——

H2

Outdoor at lower side 15m ——

∗1 : The farthest indoor unit from 1st branch is (p).

37

Pipe section

L1 + L2 + L3 + L4 + L5 + L6 + L7 + a + b + c

+ d + e + f + g + h + i + j + k + l + m + n + o + p

Airtight test

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

After the refrigerant piping has finished, execute an airtight test. For an airtight test, connect a nitrogen gas bomb as
shown in the figure below, and apply pressure.

• Be sure to apply pressure from the service ports of the packed valves (or ball valves) at liquid side, discharge gas
side, and suction gas side.

• An air tight test can be only performed to the service ports at liquid side, discharge gas side, and suction gas side
of the outdoor unit.

• Close fully valves at liquid side, discharge gas side, and suction gas side. As there is possibility that nitrogen gas
enters in the refrigerant cycle, re-tighten the valve rods before applying pressure.
(Re-tightening of the valve rods are unnecessary for valves at discharge gas side because they are ball valves.)

• For each refrigerant line, apply pressure gradually with steps at liquid side, discharge gas side, and suction gas
side.

Be sure to apply pressure to suction gas side, discharge gas side, and liquid side.

REQUIREMENT

Never use “Oxygen”, “Flammable gas” and “Noxious gas” in an airtight test.

Detailed drawing of packed valve

To gauge manifold

Discharge gas side
service port

Discharge gas side
ball valve

Liquid side
service port

Liquid side
packed valve

Piping at site

Suction gas side
service port

To
outdoor
unit

Piping
at site

To outdoor unit

Connected to indoor unit

Main pipe

Suction gas side
packed valve

To outdoor
unit

Piping
at site

Packed valve fully closed
(Suction gas side)

Outdoor unit

Brazed

Service
port

Fully
closed

Service port

Ball valve fully closed

Fully
closed

(Discharge gas side)

Packed valve fully closed
(Liquid side)

Ø6.4

Copper pipe

Low­pressure
gauge

VL VH

Ø6.4
Copper
pipe

High­pressure
gauge

Gauge
manifold

Reducing
valve

Nitrogen

gas

STEP 1 : Apply pressure 0.3MPa (3.0kg/cm2G) for 3 minutes or more.
STEP 2 : Apply pressure 1.5MPa (15kg/cm2G) for 3 minutes or more.
STEP 3 : Apply pressure 3.73MPa (38kg/cm2G) for approx. 24 hours. Available to detect slow leakage

• Check pressure down.
No pressure down: Accepted Pressure down: Check the leaked position.

However, if there is difference of ambient temp. between when pressure has been applied and when

 
 

24 hours passed, pressure changes by approx. 0.01MPa (0.1kg/cm²G) per 1°C. Correct the pressure.

Leaked position check

When a pressure-down is detected in STEP 1, STEP 2, or STEP 3, check the leakage at the connecting points.
Check leakage with hearing sense, feeler, foaming agent, etc, and perform re-brazing or re-tightening of flare if
leakage is detected.

38



Available to detect a gross leakage



5

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

REFRIGERANT PIPING

Air purge

For the air purge at installation time (Discharge of air in connecting pipes), use “Vacuum pump method” from
viewpoint of protection of earth environment.

• For protection of earth environment, do not discharge the flon gas in the air.

• Using a vacuum pump, eliminate the remained air (nitrogen gas, etc.) in the unit. If gas remains, an absence

of faculties may be caused.

After the airtight test, discharge nitrogen gas. Then connect the gauge manifold to the service ports at suction gas
side, discharge gas side and liquid side, and connect the vacuum pump as shown in the following figure.
Be sure to perform vacuuming for suction gas side, discharge gas side and liquid side.

• Be sure to perform vacuuming from both suction gas side, discharge gas side and liquid side.

• Be sure to use a vacuum pump with counter-flow preventive function so that oil in the pump does not back up in

the pipe of the air conditioner while the pump stops. (If oil in the vacuum pump enters in the air conditioner with
R410A refrigerant, a trouble is caused in the refrigerating cycle.)

Detailed drawing of packed valve

To gauge manifold

Discharge gas side
service port

Discharge gas side
ball valve

Liquid side
service port

Liquid side
packed valve

Piping at site

Connected to indoor unit

Main pipe

Suction gas side service port

Suction gas side
packed valve or
ball valve

To outdoor
unit

To
outdoor
unit

Piping
at site

To outdoor unit

Piping
at site

Packed valve fully closed
(Suction gas side)

Outdoor unit

Brazed

Service

Fully
closed

Fully
closed

port

Service port

Ball valve fully closed
(Discharge gas side)

Packed valve fully closed
(Liquid side)

Low­pressure
gauge

VLV

High­pressure
gauge

Gauge

H

manifold

P

Vacuum pump

• Use a vacuum pump having a high vacuuming degree (below –755mmHg) and a large exhaust gas amount (over
40L/minute).

• Perform vacuuming for 2 or 3 hours though time differs due to pipe length. In this time, check all packed valves at
suction gas, discharge gas, and liquid sides are fully closed.

• If vacuuming valve amount is not decreased to below –755mmHg even after vacuuming for 2 hours or more,
continue vacuuming for 1 hour or more. If –755mmHg or less cannot be obtained by 3 hours or more vacuuming,
check the leaked position.

• When vacuuming valve reached to –755mmHg or less after vacuuming for 2 hours or more, close valves VL and
VH of the gauge manifold fully, stop the vacuum pump, leave it as it is for 1 hour, and then check the vacuuming
degree does not change. If it changed, there may be a leaked position. Check the leaked position.

• After the above procedure of vacuuming has finished, exchange the vacuum pump with a refrigerant cylinder and
advance to the additional charging of refrigerant.

39

Addition of refrigerant

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

After vacuuming work, exchange the vacuum pump with the refrigerant bomb and then start the additional charging
work of refrigerant.

Calculation of additional refrigerant charge amount

Refrigerant charge amount at shipment from the factory does not include the refrigerant for pipe at the local site.
For refrigerant to be charged in pipe at the local site, calculate the amount and charge it additionally.
NOTE) If the additional refrigerant amount indicates minus as the result of calculation, use the air conditioner

without addition of refrigerant.

Outdoor unit Model MMY-MAP0801FT8 MMY-MAP1001FT8 MMY-MAP1201FT8

Charging amount (kg) 14.0

Additional refrigerant
charge amount at local site

Example : Additional charge amount R (kg) = {(L1 × 0.025kg/m) + (L2 × 0.055kg/m) + (L3 × 0.105kg/m)} × 1.3

=

Real length of



liquid pipe

L1 : Real total length of liquid pipe Ø6.4 (m)
L2 : Real total length of liquid pipe Ø9.5 (m)
L3 : Real total length of liquid pipe Ø12.7 (m)
System : 10HP

Additional refrigerant charge

×

amount per 1m liquid pipe (Table 1)

× 1.3



Table-1

Liquid pipe dia. (mm) 6.4 9.5 12.7

Additional refrigerant amount/1m liquid pipe (kg/m) 0.025 0.055 0.105

Charging of refrigerant

• Keeping valve of the outdoor unit closed, be sure to charge the liquid refrigerant into service port at liquid side.

• If the specified amount of refrigerant cannot be charged, open fully valves of outdoor unit at liquid and discharge/

suction gas sides, operate the air conditioner in COOL mode under condition that valve at suction gas side is a
little returned to close side, and then charge refrigerant into service port at suction gas side. In this time, choke the
refrigerant slightly by operating valve of the bomb to charge liquid refrigerant. The liquid refrigerant may be
charged suddenly, therefore be sure to charge refrigerant gradually.

• When refrigerant leaks and refrigerant shortage occurs in the system, recover the refrigerant in the system and
recharge refrigerant newly up to the correct level.

REQUIREMENT

<Entry of refrigerant charge amount>

• Fill the additional refrigerant record column of the wiring diagram indication plate with the additional refrigerant

amount at installation work, total refrigerant amount and the name of the service man who charged refrigerant
at installation time.

• The total refrigerant amount means the total value of the refrigerant amount at shipment and the additional

refrigerant amount at installation time. The refrigerant amount at the shipment is one described on the “Unit
nameplate”.

40

5

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-1 ]

REFRIGERANT PIPING

Full opening of valve

• Open valve of the outdoor unit fully.

• Using 4mm-hexagonal wrench, open fully the valve rods at liquid sides.

• Using a spanner, etc, open fully the valve rod of packed valve at suction gas side.

• Using the pinchers, open fully the handle of the ball valve at gas side.

Be careful that handling of ball valve differs from that of packed valve.

How to open the ball valve at gas side

Charge port

Valve unit

Handle
Pull out the handle and
using cutting pliers, etc.
turn it counterclockwise
by 90˚. (Open fully)

Charge port

Flare nut

Valve unit

Push in handle.

Flare nut

Handle position

Closed completely

Handle

Opened fully

Heat insulation for pipe

• Apply heat insulation of pipe separately at liquid, suction gas, discharge gas sides.

• Be sure to use thermal insulator with heat-resisting temp. 120°C or more.

CAUTION

• After piping connection work has finished, cover the opening of the piping/wiring panel with the piping cover, or

fill silicon or putty in space of the pipes.

• In case of drawing-out the pipes downward or sideward direction, also close the openings of the base plate

and the side plate.

• Under the opened condition, a trouble may be caused due to entering of water or dust.

In case of using pipe cover In case of using no pipe cover

Piping/wiring panel

Drawing-out sideward

Drawing-out
frontward

Close the opening
with pipe cover.

Drawing-out downward

Drawing-out
frontward

41

Piping/wiring panel

Drawing-out sideward

Fill silicon or putty in
periphery of the pipes.

Drawing-out downward

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

6

ELECTRIC WIRING

WARNING

Using the exclusive circuit, a person qualified for electrician shall work for the electric work in
conformance with the regulations of the local electric company and the Installation Manual.

If there is capacity shortage of the power circuit or incomplete electric work, a fire or electric shock is caused.

For wiring, use the specified wires and connect them securely so that external force of wire does
not transmit to the terminal connecting section.

If connection or fixing is incomplete, a fire is caused.

Be sure to connect the earth wire.

Grounding work is necessary based upon a law. If the earth grounding is incomplete, an electric shock is caused.
Do not connect earth wire to gas pipe, lightning rod, or earth wire of telephone.

CAUTION

Be sure to attach an earth leakage breaker; otherwise an electric shock may be caused.

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.

REQUIREMENT

• Perform wiring of the power supply in conformance with the regulations of the local electric company.

• For wiring of power supply in the indoor unit, refer to the Installation Manual of each indoor unit.

• Never connect the 220–240V power to the terminal block (U1, U2, U3, U4, U5, U6) for control wires.
(Trouble is caused.)

• Arrange the wires so that the electric wires do not come to contact with high-temperature part of the pipe;
otherwise coating melts and an accident may be caused.

• After connecting wire to the terminal block, take off the trap and then fix the cable with wire clamp.

• Store wiring system for control and refrigerant piping system in the same line.

• Do not turn on power of the indoor unit until vacuuming of the refrigerant pipe will finish.

• For wiring of the power supply of the indoor unit and inter-unit cabling between indoor and outdoor units, refer to
the Installation Manual of indoor unit.

the

42

6

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

ELECTRIC WIRING

Power supply specifications

• Power supply specifications of outdoor unit

Select the power supply cabling and fuse of outdoor unit from the following specifications:
wire 5-core, in conformance with Design 60245 IEC 66

Electrical wiring design

3-phase
50Hz 380-415V
Earth leakage breaker

hand switch

Outdoor
power source

• Power supply specifications of indoor unit

Indoor power source

Earth

Pull box

Single phase
50Hz 220-240V
Earth leakage breaker

power switch

• Unit capacities and power supply wire sizes (Reference)

Model

MMY-MAP0801FT8

MMY-MAP1001FT8

MMY-MAP1201FT8

• Determine the wire size for indoor unit according to the number of connected indoor units downstream.

• Observe local regulation regarding wire size selection and installation.

3.5 mm² (AWG #12) Max. 20 m 30 A

5.5 mm² (AWG #10) Max. 28 m 30 A

5.5 mm² (AWG #10) Max. 27 m 30 A

FS unit FS unit FS unit FS unit

FS unit FS unit FS unit FS unit

Power supply wiring

Wire size Field fuse

43

Design of control wiring

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

n Outdoor unit

Model name

MMY-

MAP0801FT8 400-3-50 342 457 5.2 + 5.2 — 0.60 1.0 20.0 30 —
MAP1001FT8 400-3-50 342 457 6.5 + 6.5 — 0.60 1.1 22.5 30 —
MAP1201FT8 400-3-50 342 457 9.5 + 9.5

Nominal voltage

(V-Ph-Hz)

Voltage range Compressor Fan Motor Power Supply

Min. Max. RLA LRA kW FLA MCA MOCP ICF

—

0.60 1.1 24.5 30

Legend MCA : Minimum Circuit Amps

MOCP : Maximum Overcurrent Protection (Amps)
ICF : Maximum Instantaneous Current Flow Start
RLA : Rated Load Amps
LRA : Locked Rotor Amps

Power supply
single phase
220-240V 50Hz

[Central remote controller] (Option)
TCB-SC642TLE (For Line 64)

Transmission wire for control between
outdoor unit and indoor unit

(Open)

Earth

Connection of shield wire must be connected
(Connected to all connecting sections in each indoor unit)

FS unit

FLA : Full Load Amps
kW : Fan Motor Rated Output (kW)

NOTE : RLA is based on the following conditions.

Indoor temperature : 27°C DB/19°C WB
Outdoor temperature : 35°C DB

FS unit FS unit FS unit

—

FS unit FS unit FS unit FS unit

Wired
remote controller

• Wire specification, quantity, size of crossover wiring and remote controller wiring

Name Q’ty

Crossover wiring
(indoor-indoor / indoor-outdoor / outdoor­indoor control wiring, central control wiring)

Remote controller wiring 2 cores 0.5 to 2.0mm²— — —

Indoor unit - FS unit control wiring

2 cores 1.25mm² 2.0mm² Shield wire

Use the transmission wire (6m) attached to FS unit. If the indoor unit is placed 5m or more
apart from the FS unit, use the connecting wire (RBC-CBK15FE (16m)) sold separately.

Up to 500m Up to 1000m 1000 to 2000m

Size

Specification

(1) The crossover wiring and central control wiring use 2-core non-polarity transmission wires. Use 2-core shield

wires to prevent noise trouble. In this case, close (connect) the end of shield wires, and perform the functional
grounding for the end of the shield wires which are connected to both indoor and outdoor units.

For the shield wires which are connected between the central remote controller and the
outdoor unit, perform the functional grounding at only one end of central control wiring.

(2) Use 2-core and non-polarity wire for remote controller. (A, B terminals)

Use 2-core and non-polarity wire for wiring of group control. (A, B terminals)

• Specifications of wires for controlling

Shield

wire earth

U4U3U2U1 U5 U6

1. Connect each wire for controlling as shown below.

44

Earth screw

Control wiring between
indoor and outdoor units

6

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

ELECTRIC WIRING

• Group Control through a Remote Controller

Group control of multiple indoor units (8 units) through a single remote controller

Indoor unit No.1

AB AB AB AB AB AB

Remote
controller

(A.B)

No.8No.7No.4No.3No.2

For Indoor unit power supply (The outdoor unit has a separate power supply.)

Item

Model

All models of indoor units 2.0 mm² (AWG#14) Max. 20m 3.5 mm² (AWG#12) Max. 50m

Indoor unit - FS unit power supply wiring

Use the communication wire (6m) attached to FS unit.
If the indoor unit is placed 5m or more apart from the FS unit, use the connecting wire
(RBC-CBK15FE (16m)) sold separately

NOTE :

The connecting length indicated in the table represents the length from the pull box to the outdoor unit when the
indoor units are connected in parallel for power, as shown in the illustration below. A voltage drop of no more than
2% is also assumed. If the connecting length will exceed the length indicated in the table, select the wire thickness
in accordance with indoor wiring standards.

Power supply wiring

Wire size

Indoor power source
single phase 220–240V, 50Hz

Earth leakage breaker

Switch

Pull box

FS unit FS unit FS unit FS unit

4321

FS unit FS unit FS unit FS unit

8765

CAUTION

(1) Keep the refrigerant piping system and the indoor-indoor/indoor-outdoor control wiring systems together.
(2) When running power wires and control wires parallel to each other, either run them through separate

conduits, or maintain a suitable distance between them.
(Current capacity of power wires: 10A or less for 300mm, 50A or less for 500mm)

45

n System wiring diagram

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

Power supply
3 phase 380-415V 50Hz

Earth leakage breaker
Power swith

Outdoor unit

Earth

terminal

Power supply
Single phase
220-240V
50Hz

Outdoor side

Indoor side

Earth leakage

breaker

Power switch

Earth

terminal

U1

U2 U3 U4 U5 U6

Indoor unit

Earth

terminal

A
B

U1/U2

Earth terminal

LN

Pull
Box

Control

wiring

Powe r

line

Earth

terminal

Remote
controller

A
B

FS unit

CN02

CN01

Earth

terminal

Central remote

controller

U1/U3
U2/U4

U1/U2

Earth terminal

LN

Earth

terminal

Pull
Box

Single phase
220-240V 50Hz

Indoor unit

A
B

CN81

Control

wiring

Powe r

line

Remote
controller

A
B

FS unit

CN02

CN01

Earth

terminal

U1/U2

Earth terminal

LN

terminal

Earth

Indoor unit

A
B

Control

wiring

Powe r

line

Remote
controller

A
B

FS unit

CN02

CN01

Earth

terminal

NOTE :

Control wire and power wire between FS unit and indoor unit are the accessory parts of FS unit.
(Wire length : 6m)

If the length between indoor and FS unit exceeds 5m, connect by using the connection cable kit sold separately
(RBC-CBK15FE).

46

6

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

ELECTRIC WIRING

Connection of power supply wire with control wire

Insert power supply wire and control wire after removing knockout of the piping/wiring panel at front side of the
outdoor unit.

Knockout for power supply wire

Knockout for control wire

Piping/wiring panel

When insert power supply wire
and control wire, protect power supply wire
and control wire from edge after removing knockout.

n Power supply wire

1. Connect the power supply wires and earthing wire to the terminal block of the power supply through a notched
section at side of the electric parts box, and fix with a clamp.

2. Bundle the power supply wires using the hole so that they are not out of the notched section of the electric parts
box.

n Control wire

1. Connect the control wire between indoor and outdoor units and the control wire between outdoor units to
(U1 to U4) terminal section through a hole at side of the electric parts box, and fix with a clamp.

2. Use the control wire with 2-core shield wire (1.25mm² or more) in order to prevent noise trouble. (Non-polarity)

NOTE :

1) Be sure to separate the power supply wires and each control wire.

2) Arrange the power supply wires and each control wire so that they do not contact with the bottom surface of the
outdoor unit.

3) A terminal block (U3, U4 terminal blocks) for connecting an optional part “Central remote controller etc.” is
provided on the inverter unit, so be careful to miswiring.

U1-U6 Terminal

Power supply
terminal block

L1 L2 L3 N

Earth screw

U1 U2 U3 U4 U5 U6

U1-U2
U3-U4

( )

U5-U6

: For wiring for control wire between indoor/outdoor unit
: For “Central remote controller etc.”
: Not use this model.

L1 L2 L3 N

10mm
or more

Earth
screw

P.C. board

Earth line

47

Power supply wire

7

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

ADDRESS SETUP

In this air conditioner, it is necessary to set up the indoor address before starting the operation.
Set up the address in the following procedure.

CAUTION

1. Set up address after wiring work.

2. Be sure to turn on the power in order of indoor unit → outdoor unit. If turning on the power in the reverse

order, a check code [E19] is output. When a check code is output, turn on the power again.

3. It requires maximum 10 minutes (Usually, approx. 5 minutes) to set up automatically an address to 1 system.

4. To set up an address automatically, the setup at outdoor side is necessary.
(Address setup cannot be performed by power-ON only.)

5. To set up an address, it is unnecessary to operate the air conditioner.

6. Manual address setup is also available besides automatic setup.
Automatic address : Setup from SW15 on the interface P.C. board of the outdoor unit
Manual address : Setup from the wired remote controller

* It is temporarily necessary to set the indoor unit and wired to 1 : 1.

(In group operation and in time without remote controller)

Automatic Address Setup

Without central control : To the address setup procedure 1
With central control :To the address setup procedure 2

(However, go to the procedure 1 when the central control is performed in a single refrigerant line.)

(Example)

Address setup procedure

Wire systematic diagram

In case of central control in a single refrigerant line

To procedure 1

Outdoor

Indoor Indoor

Remote

controller

Central remote

controller

Remote

controller

Outdoor

Indoor Indoor

Remote

controller

Central remote

controller

Address setup procedure 1

Turn on power of indoor/outdoor units.



(In order of indoor
After approx. 1 minute, check that U. 1. L08 (U. 1. flash) is



displayed in 7-segment display section on the interface P.C.
board of the outdoor unit.

Push SW15 and start setup the automatic address.



(Max. 10 minutes for 1 line (Usually, approx. 5 minutes))
When the count Auto 1 → Auto 2 → Auto 3 is displayed in



7-segment display section, and it changes from
U. 1. - - - (U. 1. flash) to
U. 1. - - - (U. 1. light) , the setup finished.

When perform a central control, connect a relay connector



between [U1U2] of the outdoor unit and [U3U4] terminals.

→→

→ Outdoor)

→→

In case of central control over refrigerant lines

To procedure 2

Outdoor

Indoor Indoor

Remote

controller

Remote

controller

Outdoor

Indoor Indoor

Remote

controller

Central remote

controller

Interface P.C. board

SW04

SW05 SW15

D600 D601 D602 D603 D604

SW01

SW02 SW03

1

1 1

5

U1 U2

For internal
wiring between
indoor and
outdoor

U3 U4

For wiring of
central control
system

3

2 4

U5 U6

Not use this
model

48

2

U1 U2

For

internal

wiring

between
indoor and
outdoor

U3 U4

For

wiring

of
central control
system

U5 U6

Not use this
model

7

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

ADDRESS SETUP

REQUIREMENT

• When a group control is performed over the
multiple refrigerant systems, be sure to turn on the
power supplies of all the indoor units connected in
a group in the time of address setup.

•

If turning on the power for each refrigerant
to set up address, a header indoor unit is set for
each

system

. Therefore, an alarm code “L03”

system

(Example)

Wire
systematic
diagram

Group control over

multiple refrigerant lines

Outdoor

IndoorIndoor

Outdoor

Indoor Indoor

(Duplicated header indoor units) is output in
operation after address setup. In this case, change
the group address from the wired remote controller
so that only one header indoor unit is set up.

Address setup procedure 2

Using SW13 and 14 on the interface P.C. board of the outdoor



unit in each line, set up the line address for each line.
(At shipment from factory: Set to Address 1)

Remote

controller

ON

1

2 3 4

SW11

1ON2 3 4

Interface P.C. board

1ON2 3 4

SW12

ON ONON ON

1

2 3 4

1ON2 3 4

SW13

11 2 3 4

1ON2 3 4

SW14

1 2 3 4

Note) Be careful not to duplicate with other refrigerant system or

other line address.

SW06

SW07

SW09SW08

SW10

Line address switch on outdoor interface P.C. board (¡: Switch ON, × : Switch OFF)

Line

address

1
2
3
4
5
6
7
8

9
10
11
12
13
14

SW13 SW14

12341234

ЧЧЧЧЧ
Ч
ЧЧ
Ч
ЧЧЧ
Ч
ЧЧ
Ч
ЧЧЧЧ
Ч
ЧЧ
Ч
ЧЧЧ
Ч

×××

¡

××

¡

¡¡

¡

¡¡¡

¡

¡¡

¡

××

¡

×

¡

¡¡

××

×

¡

×

¡¡

×

¡¡

×
×
×
×

¡
¡
¡
¡

Line

address

15
16
17
18
19
20
21
22
23
24
25
26
27
28

SW13 SW14

12341234

××
×

¡
¡¡
¡
¡¡¡
¡
¡¡
¡
¡¡¡¡
¡
¡¡
¡
¡¡¡

¡¡¡

¡¡¡¡

××××

×××

×

¡

××
××

××

×

×

¡¡

¡
¡

×
×
×
×

×××

××

×

¡

¡
¡

×

¡

×

¡

: Is not used for setup of line address. (Do not change setup.)

Check that the relay connectors between [U1U2] and [U3U4] terminals are come out in all outdoor units to which



the central control is connected. (At shipment from factory: No connection of connector)
Turn on power of indoor/outdoor.



(In order of indoor

After approx. 1 minute, check that 7-segment display is



→→

→ outdoor)

→→

U.1.L08 (U.1. flash) on the interface P.C. board.

Push SW15 and start setup the automatic address.



(Max. 10 minutes for 1 line (Usually, approx. 5 minutes))
When the count Auto 1



→→

→ Auto 2

→→

→→

→ Auto 3 is displayed in

→→

7-segment display section, and it changes from
U. 1. - - - (U. 1. flash) to U. 1. - - - (U. 1. light) , the setup

finished.
Procedure  to  are repeated in other refrigerant systems.



49

When address setup has finished in all the systems, turn

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]



off SW30-2 on the interface P.C. boards of the lines
connected to the identical central control except a line
with least line address number.
(Terminator resistors of the wires in the central control
line of indoor/outdoor are unified.)

Connect the relay connector between [U1U2] and [U3U4]



terminals of the outdoor unit for each refrigerant line.
Then set up the central control address.



(For the central control address setup, refer to the Instal­lation manual of the central control devices.)

1ON2 3 4

SW11

1ON2 3 4

SW06

Interface P.C. board

SW30

1ON2 3 4

SW12

ON ONON ON

1

2 3 4

SW07

1ON2 3 4

SW13

11 2 3 4

SW09SW08

1ON2 3 4

SW14

1ON2

SW30

1 2 3 4

SW10

Switch setup

(Example in case of central control over refrigerant lines)

Outdoor side (Manual setup)

* Manual setup is necessary for column of which letter color is reversed.

Outdoor interface

P.C. board

SW13, 14

(Line address)

SW30-2
Terminator resistor of
indoor/outdoor communi

cation line/central control
communication line

Relay connector

Outdoor unit Outdoor unit

1

ON

Short after

address setup

Outdoor unit

U3 U4

Outdoor unit

OFF after

address setup

Short after

address setup

U3 U4

SW04

SW05 SW15

D600 D601 D602 D603 D604

SW01

SW02 SW03

1

1 1

Outdoor unit

3

OFF after

address setup

Short after

address setup

Outdoor unit

U3 U4

SW15

7-segment

display

Setup at shipment

from factory

12

ON

Open

Indoor side

(Automatic setup)

Line address

Indoor unit address

Group address

U1 U2

controller

U1 U2 U5 U6

Relay

connector

U1 U2

A B

Remote

Individual Group

1
1
0

A B

Remote

controller

1
2
0

Relay

connector

U1 U2

U1 U2 U5 U6

A B

Remote

controller

2
1
1

CAUTION

For relay connector
Never connect a relay connector until address setup for all the refrigerant systems finishes;

otherwise address cannot be correctly set up.

50

Relay

connector

U1 U2

A B

2
2
2

U1 U2 U5 U6

U1 U2

A B

Remote

controller

3
1
0

8

9

7

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

ADDRESS SETUP

Manual address setup from remote controller

In case to decide an address of the indoor unit prior to finish of indoor electric wiring work and unpracticed outdoor
electric wiring work (Manual setup from wired remote controller)

Arrange indoor unit in which address
is set up and the wired remote controller to 1 : 1.

(Wiring example in 2 lines)

Line 1

Outdoor

Indoor

Remote

controller

Line address 1
Indoor address
Group address

In the above example, under condition of
no inter-unit wire of the wired remote
controller, set the address after individual
connecting of the wired remote controller.

Header Follower

1

1

2

1

2

Line 2

(Line address)

1

2
3
2

2

1

2

2

2

(Indoor address)

→→

→

→→

→→

→

→→

Turn on the power.

1

Push simultaneously

for 4 seconds or more.

LCD changes to flashing.

2

Using the setup temp. / buttons,

12 to the item code.

set

3

Using the timer time

the line address.

(Match it with the line address on the interface P.C. board
of the outdoor unit in the identical refrigerant system.)

4

Push

(OK when display goes on.)

5

Using the setup temp. / buttons,

13 to the item code.

set

6

Using the timer time

the indoor address.

7

Push

(OK when display goes on.)

SET

SET

button.

button.

SET

/

/

+

+

CL

buttons, set up

buttons, set up

buttons

Group address

Individual : 0000
Header unit : 0001
Follower unit : 0002

Operation procedure

} In case of group control

(Group address)

→→

→

→→

8

9

10

1 2 3 4 5 6
7 8 9 10 11

SET DATA

Data Item code

UNIT No.

R.C. No.

11

1

SET

CL

UNIT

End

CODE No.

11

3, 6,
2, 5,

Using the setup temp.

set 14 to the item code.

Using the timer time

Individual =
Follower unit =

Push

(OK when display goes on.)

Push

Setup operation finished.
(Status returns to normal stop status.)

0000 , Header unit = 0001 ,

0002 .

button.

SET

button.

/ buttons,

/

buttons, set

4, 7, 10

51

Note 1)

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

When setting the line address from the wired remote controller, do not use address 29 and 30.
The address 29 and 30 cannot be set up in the outdoor unit. Therefore if they are incorrectly set up, a check code

[E04] (Indoor/outdoor communication circuit error) is output.

Note 2)

When manual address has been set up from the wired remote controller, set up the following items for outdoor unit
of each line if performing a central control over refrigerant systems.

• Using SW13 and 14 on the interface P.C. board of the outdoor unit in each line, set up the line address for
each line.

• Turn off SW30-2 on the interface P.C. boards of the outdoor units of the lines connected to the identical central
control except a line with least line address number.
(The terminal resistances of the wires in the central control line of indoor/outdoor are unified.)

• Connect the relay connector between [U1U2] and [U3U4] of the outdoor unit for each refrigerant line.

• Then set up the central control address.
(For the central control address setup, refer to the Installation manual of the central control devices.)

Confirmation of indoor address and the indoor unit position on the remote controller

[Confirmation of indoor unit No. and position]

1. When you want to know the indoor address though position of the indoor unit itself can be

recognized;

• In case of individual operation (Wired remote controller : Indoor unit = 1 : 1) or group control

<Procedure> (Operation while the air conditioner operates)

1

If it stops, push

2

Push

The unit NO 1-1 is displayed on the LCD. (Disappears after several seconds) The displayed unit No indicates
the line address and indoor address. (If there is other indoor unit connected to the same remote controller (Group
control unit), other unit No is displayed every pushing

UNIT

button.

button.

UNIT

UNIT No.

button.)

1

Operate

2

UNIT

CL

SET

Operation procedure

1 2

52

Operation procedure

1 2 3

End

End

UNIT

SET

CL

UNIT No.

CODE No.

SET DATA

R.C. No.

3
1

2

7

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

ADDRESS SETUP

2. When you want to know position of the indoor unit using the address

• To confirm the unit numbers in a group control;

<Procedure> (Operation while the air conditioner stops)

The indoor unit numbers in a group control are successively displayed, and the corresponding indoor fan is turned on.

1

Push

seconds or more.

• Unit No is displayed.

• The fans of all the indoor units in a group control are
turned on.

2

Every pushing

numbers in the group control are successively
displayed.

• The firstly displayed unit No. on number indicates the
address of the header unit.

• Only fan of the selected indoor unit is turned on.

3

Push button to finish the procedure.

All the indoor units in group control stop.

+ buttons simultaneously for 4

button, the indoor unit

UNIT

• To confirm all the unit No. from an arbitrary wired remote controller;

<Procedure> (Operation while the air conditioner stops)

The indoor unit No. and position in the same refrigerant line can be confirmed. An outdoor unit is selected, the
indoor unit No. in the same refrigerant system are successively displayed, and then its indoor unit fan is turned on.

1

Push the timer time

Firstly, the line 1, item code AC (Address Change) is displayed. (Select outdoor unit.)

2

Using

address.

3

Using

address.

• The indoor address, which is connected to the

4

Every pushing

numbers in the same refrigerant system are suc­cessively displayed.

• Only fan of the selected indoor unit operates.

[To select another line address]

5

Push

• The indoor address of another line can be successively

6

Push button to finish the procedure.

SET

refrigerant system of the selected outdoor unit is dis­played and the fan is turned on.

CL

confirmed.

+

UNIT

button, determine the selected line

UNIT

button to return to procedure 2 .

+ buttons simultaneously for 4 seconds or more.

buttons, select the line

SET DATA

button, the indoor unit

6
1

SET

3

Operation procedure

1 2 3
4

5 6

CODE No.

UNIT No.

R.C. No.

UNIT

CL

End

4
2

5

53

Change of indoor address from wired remote controller

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

• To change the indoor address in individual operation (Wired remote controller : Indoor unit = 1 : 1) or
group control (When the setup operation with automatic address has finished, this change is available.)

<Procedure> (Operation while air conditioner stops)

1

Push simultaneously

(The firstly displayed unit No. indicates the header indoor unit in group control.)

2

In group control, select an indoor unit No. to be changed by

(The fan of the selected indoor unit is turned on.)

3

Using the setup temp.

4

Using the timer time

want to change.

5

Push

6

Using the

Repeat the procedure

7

After the above change, push

8

If it is acceptable, push

SET

button.

UNIT

button, select the unit No. to be changed at the next time.

+

SET

/

4

to 6 and change the indoor address so that it is not duplicated.

+

CL

/

buttons, change the displayed setup data to a data which you

UNIT

button to finish confirmation.

buttons for 4 seconds or more.

button.

UNIT

buttons, set 13 to the item code.

button to confirm the changed contents.

SET DATA

UNIT No.

R.C. No.

CODE No.

4
8

UNIT

1

SET

CL

5

Operation procedure

1 2 3 4 5 6 7 8

2, 6, 7

3

End

54

7

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

ADDRESS SETUP

• To change all the indoor addresses from an arbitrary wired remote controller;

(When the setup operation with automatic address has finished, this change is available.)

Contents : Using an arbitrary wired remote controller, the indoor unit address can be changed for each same

refrigerant system.

∗∗

∗ Change the address in the address check/change mode.

∗∗

<Procedure> (Operation while air conditioner stops)

1

Push the timer time

Firstly, the line 1, item code AC (Address Change) is displayed.

2

Using

3

Push

• The indoor address, which is connected to the refrigerant line of the selected outdoor unit is displayed and the

4

The indoor address of the setup data moves up/down by the timer time

Change the setup data to a new address.

5

Push

6

Every pushing

sively displayed. Only fan of the selected indoor unit operates.

Repeat the procedure 4 to 6 and change all the indoor addresses so that they are not duplicated.

7

Push

(All the displays on LCD go on.)

8

Push button to finish the procedure.

SET

fan is turned on.
First the current indoor address is displayed on the setup data. (Line address is not displayed.)

SET

SET

+

UNIT

button.

button to determine the setup data.

UNIT

button.

+ buttons simultaneously for 4 seconds or more.

buttons, select the line address.

/

button, the indoor unit numbers in the same refrigerant line are succes-

buttons.

SET DATA

UNIT No.

R.C. No.

CODE No.

1

UNIT

CL

SET

3

Here, if the unit No. is not called up, the outdoor
unit in this system does not exist.

Push

according to procedure 2 .

button, and then select a line

CL

Cancel of line selection

2

SET DATA

UNIT No.

R.C. No.

CODE No.

4
8

UNIT

CL

SET

5, 7

To finish the setup

Operation procedure

1 2 3 4 5 6 7 8

6

End

55

Clearance of address (Return to status (Address undecided) at shipment from factory)

Center unit

Center unit

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

Method 1

An address is individually cleared from a wired remote controller.
“0099” is set up to line address, indoor address, and group address data from the wired remote controller.
(For the setup procedure, refer to the above-mentioned address setup from the wired remote controller.)

Method 2

Clear the indoor addresses in the same refrigerant line from the outdoor unit.

1. Turn off the power of the refrigerant system to be returned to the status at shipment from factory, and change the

outdoor unit to the following status.

1) Remove the relay connector between [U1U2] and [U3U4].

(If it has been already removed, leave it as it is.)

2) Turn on SW30-2 on the interface P.C. board of the outdoor unit if it is ON.
(If it has been already ON, leave it as it is.)

Central control

device

U1U3U2

U4

U3 U4

U1 U2 U5 U6

Outdoor unit

Center unit

U3 U4

Outdoor unit Outdoor unit

U1 U2 U5 U6

Center unit

U1 U2

U3 U4

U5 U6

U1 U2

controller

A B

Remote

U1 U2

controller

A B

Remote

U1 U2

A B

Remote

controller

Unit of which address is to be returned to the initial status

U1 U2

A B

U1 U2

controller

A B

Remote

2. Turn on the indoor/outdoor power of which address is to be cleared. After approx. 1 minute, check that
“U.1. - - -” is displayed, and then execute the following operation on the interface P.C. board of the outdoor unit of
which address is to be cleared in the refrigerant system.

SW01 SW02 SW03

212

222

After checking that “A.d.buS” is displayed on 7-degment
display, and then push SW04 for 5 seconds or more.

After checking that “A.d.nEt” is displayed on 7-degment
display, and then push SW04 for 5 seconds or more.

SW04

Address which can be cleared

Line + Indoor + Group address

Central address

3. After “A.d. c.L.” has been displayed on 7-degment display, return SW01/SW02/SW03 to 1/1/1.

4. When the address clearing has correctly finished, “U.1.L08” is displayed on 7-degment display after a while.
If “A.d. n.G.” is displayed on 7-degment display, there is a possibility which is connected with the other
refrigerant system. Check again the relay connector between [U1U2] and [U3U4] terminals.

NOTE) Be careful that the other refrigerant system address may be also cleared if clearing operation is not

correctly executed.

5. After clearing of the address, set up an address again.

56

8

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

When setting the specific indoor unit to Cooling Only unit without connecting to the flow selector unit, setup to the
indoor unit to become the Cooling Only unit is necessary.

Perform setup in the following procedure.

Setup to the indoor unit is performed by handling the wired remote controller.
Even if a wired remote controller is not used, attach a wired remote controller for setup.

When using the air conditioner with a wireless remote controller, select “Cooling Only” of the wireless remote
controller after the above setup.
For handling the wireless remote controller, refer to the manual attached to the wireless remote controller.

Change the setup during stop of the operation.
(Be sure to stop operation of the air conditioner.)

HOW TO SET UP THE COOLING ONLY INDOOR UNIT

SET DATA

CODE No.

UNIT No.

R.C. No.

Procedure

1

2

3

4

4

6
1

UNIT

CL

SET

2
3

5

Description

When pushing
flashes as shown in the figure.

Check that the displayed item code is [10].

• If the item code indicates one other than [10], push
erase the display, and then retry the operation from the first step.
(After pushing
controller cannot be accepted after a while.) (* The display changes according to the indoor unit model.)

In a group control, the firstly displayed indoor unit No. becomes the header unit.
Every pushing [UNIT] button, the indoor unit No. in the group control is displayed successively.

Select an indoor unit of which setup is to be changed.
In this time, the position of the indoor unit of which setup is to be changed

can be confirmed because the fan and flap of the selected indoor unit work.

Use and buttons of the set temperature to specify the item code [0F].

Use and buttons of the timer time to select the setup data [0001].

Cooling Only setup

SET

+ CL + buttons simultaneously for 4 seconds or more, after a while, the display part

SET DATA

*

SET DATA

SET DATA

button, the operation of remote

Setup data

0000

Heat pump

button to

0001

Cooling Only

UNIT No.

R.C. No.

UNIT No.

** **

R.C. No.

CODE No.

CODE No.

SET

5

6

Push

• To change the setup of an indoor unit other than the selected one, start operation from Procedure

• In a group control, setup change of all the indoor units in a group is necessary.

• Pushing

• In this case, retry from Procedure

When the setup finished, push button. (The setup is determined.)
Pushing

(For some time after
remote controller cannot be accepted.)

button. In this time, if the display changes from flashing to lighting, the setup completes.

To change the setup of the set other than the selected one, start again operation from Procedure

CAUTION Cooling Only and Heat pump cannot exist in the same group.

CL

button clears the set up contents which have been already set.

2

.

button deletes the display and returns to normal stop status.

button has been pushed, the operation of the

57

2

.

2

.

9

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

TEST OPERATION

Before test operation

Check valve of the refrigerant pipe of the outdoor unit is “OPEN”.

• Using 500V-megger, check there is 1MΩ or more between

the terminal block of the power supply and the earth.
If the value is below 1MΩ, do not operate the air conditioner.

How to perform a test operation

In case of test operation on the wired remote controller
Check the operation of the air conditioner in usual operation by the wired remote controller.

For the procedure of the operation, refer to the attached Owner’s Manual.
For a case of using a wireless remote controller, refer to the Installation Manual of the indoor unit.

A forced test operation is available in the following procedure under condition that the thermostat-OFF in the room.
In a forced test operation, the test operation is cleared after operation for 60 minutes and then returns to the usual

operation in order to prevent a serial operation.

NOTE) Do not use the forced test operation for cases

other than the test operation because it applies an
excessive load to the air conditioner.

• Turn on the power and then turn on
the case heater of the compressor.

To protect the compressor at start
time, keep power-ON before 12
hours or more.

WARNING

2,
4

1,
5

SET

In case of wired remote controller

UNIT

CL

3

Procedure

1

2

3

4

5

Operation

When pushing button for 4 seconds or more, [TEST] is displayed
on the display part and the mode changes to test operation mode.
([TEST] is displayed on the display part during test operation.)

Push

Using

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

• The temperature cannot be adjusted during test operation.

• An error is detected as usual.

After the test operation has finished, push

(Display is same to that in procedure

Push button to clear the test operation mode.
([TEST] in the display part disappears and the status changes to the
usual stop status.)

button.

button, change the operation mode to [COOL] or [HEAT].

button to stop the operation.

1

.)

TEST

58

9

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

TEST OPERATION

In case of test operation on the interface P.C. board of the outdoor unit

This air conditioner has a function which executes a test operation by operation of the switches on the interface P.C.
board of the outdoor unit.

This function is classified into “Individual test operation” which performs a test operation individually in each indoor
unit and “Collective test operation” which performs a test operation for all the connected indoor units.

<Individual test operation>

Procedure

Start
operation

Stop
operation

1

2

3

1

Set operation mode on wired remote controller of the indoor
unit which is operated with test mode to [COOL] or [HEAT].
(When it is not set up, operate the air conditioner with the
current operation mode.)

Set the rotary switch SW01 on the interface P.C. board of the
outdoor unit to [16], and match SW02 and SW03 to the
address of the indoor unit to be operated with test mode.

Push SW04 for 10 seconds or more.

• Operation mode changes to the operation mode of wired
remote controller of the corresponding indoor unit.

• Temperature cannot be adjusted during “Test operation”.

• Error is detected as usual.

• Test operation is not performed 3 minutes after power was
turned on or operation has stopped.

Return the rotary switches on the interface P.C. board of the
outdoor unit, SW01 = [1], SW02 = [1], SW03 = [1].

<Collective test operation>

Procedure

Start
operation

Stop
operation

1

2

1

Set the rotary switches of interface P.C. board of the outdoor unit;
All cooling operation: SW01 = [2], SW02 = [5], SW03 = [1]
All heating operation: SW01 = [2], SW02 = [6], SW03 = [1]

Push SW04 for 2 seconds or more.

• Temperature cannot be adjusted during “Test operation”.

• Error is detected as usual.

• Test operation is not performed 3 minutes after power was turned on
or operation has stopped.

Return the rotary switches on the interface P.C. board of the outdoor
unit, SW01 = [1], SW02 = [1], SW03 = [1].

Operation

Operation

7-segment display

[A]

[U1]

[A]

[ ]

↓↓

↓

Address display of the

corresponding indoor unit

Address display of the

corresponding indoor unit

↓↓

[A]

[ ]

↓↓

↓

↓↓

[A]

[U1]

7-segment display

[A]
[C ]
[H ]

[A]
[C ]
[H ]

[A]

[U1]

[B]

[ ]

[B]

[ ]

[B]

[ ]

↓↓

↓

↓↓

[FF] is displayed

for 5 seconds.

[B]

[ ]

[B]
[ ]
[ ]

[B]
[ –C ]
[ –H ]

[B]
[ ]

Interface P.C. board

SW04 SW05 SW15

D600D601 D602 D603 D604

SW031SW021SW01

1

1ON2 3 4

7-segment

display [A]

ON ONON ON

1

2 3 4

SW06

SW07

SW04 SW05 SW15

D600 D601 D602 D603 D604

SW01

1

Rotary switch

59

SW02

1

11 2 3 4

SW09SW08

SW03

1

1 2 3 4

SW10

Push switchPush switch

7-segment
display [B]

10

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

TROUBLESHOOTING

In addition to the check code on the remote controller of the indoor unit, a trouble of the outdoor unit can be
diagnosed by 7-segment display of the control P.C. board of the outdoor unit. Make good use of this function for
various checks. After check, return each bit of Dip switch to OFF position.

n Segment display and check code

Rotary switch

setup value

SW01 SW02 SW03

111

Displayed contents

Check code of outdoor unit

LED

A

B

D600

D601 D602 D603 D604

AB

Outdoor unit No.

(U1 only)

Check code display∗

∗ However, when there is an

auxiliary code, the check code
(for 3 seconds) and the
auxiliary code (for 1 second)
are alternately displayed.

Check Code (Outdoor 7-segment display [B])

Displayed when SW01: 1, SW02: 1, SW03: 1

Outdoor 7-segment display

Check code

E06

E07

E08

E12

E15

E16

E19

E20

E23

E25

E26

E28

E31

F04

Auxiliary code

Number of indoor unit which received normally

——

Duplicated indoor addresses

01: Communication between indoor and outdoor
02: Communication between outdoor units

——

00: Capacity over 01~: No. of connected units

00: Header is nothing
02: Two or more header units

01: Other line outdoor connected
02: Other line indoor connected

——

——

Number of outdoor unit which received normally

Detected outdoor unit No.

IPDU quantity information

——

Check code name

Decrease of number of indoor units

Indoor/Outdoor communication circuit error

Duplication of indoor addresses

Automatic address start error

Indoor is nothing during automatic addressing

Capacity over / Number of connected indoor units

Number of header outdoor units error

Other line connected during automatic addressing

Sending error between outdoor units communication

Duplicated follower outdoor address setup

Decrease of connected outdoor units

Follower outdoor unit error

IPDU communication error

TD1 sensor error

F05

F06

F07

F08

F12

F13

F15

F16

F23

F24

F31

01: TS1 sensor error 02: TS2 sensor error

01: Compressor 1 side 02: Compressor 2 side

——

——

——

——

——

——

——

——

——

60

TD2 sensor error

TE1 sensor error

TL sensor error

TO sensor error

TS1, TS2 sensor error

TH sensor error

Outdoor temp. sensor miswiring (TE, TL)

Outdoor pressure sensor miswiring (Pd, Ps)

Ps sensor error

Pd sensor error

Outdoor EEPROM error

10

Outdoor Unit / INSTALLATION MANUAL [ VOLUME-2 ]

TROUBLESHOOTING

Outdoor 7-segment display

Check code

H01

H02

H03

H04

H06

H07

H08

H14

H16

L04

L06

L08

Auxiliary code

01: Compressor 1 side 02: Compressor 2 side

01: Compressor 1 side 02: Compressor 2 side

01: Compressor 1 side 02: Compressor 2 side

——

——

——

01: TK1 sensor error 02: TK2 sensor error
03: TK3 sensor error 04: TK4 sensor error

——

01: TK1 oil circuit system error
02: TK2 oil circuit system error
03: TK3 oil circuit system error
04: TK4 oil circuit system error

——

Number of indoor units with priority

——

Check code name

Compressor breakdown

Magnet switch error
Overcurrent relay operation
Compressor trouble (Lock)

Current detective circuit system error

Compressor 1 case thermo operation

Low-pressure protective operation

Oil level down detection protection

Temp sensor error for oil level detection

Compressor 2 case thermo operation

Magnet switch error
Overcurrent relay operation
Oil level detective circuit system error

Outdoor line address duplicated

Duplication of indoor units with priority

Indoor group/Address unset

L10

L18

L28

L29

L30

L31

P03

P04

P05

P07

P10

P13

P15

P17

P19

P20

P22

P26

——

Detected indoor address

——

IPDU quantity information

Detected indoor address

——

——

01: Compressor 1 side 02: Compressor 2 side

01: Phase missing detection
02: Phase order error

01: Compressor 1 side 02: Compressor 2 side

Detected indoor address

——

01: TS condition 02: TD condition

——

Detected outdoor unit number

——

0 ∗: IGBT short

: Fan motor position detective circuit error

1

∗

: Fan motor lock trouble

3

∗

: TH sensor temp. error

C

∗

: TH sensor error

D

∗

01: Compressor 1 side 02: Compressor 2 side

Outdoor capacity unset

Flow selector unit error

Outdoor connected quantity over

IPDU quantity error

External interlock of indoor unit

Extended I/C error

Discharge temp TD1 error

High-pressure SW system operation

Phase missing detection / Phase order error

Heat sink overheat error

Indoor overflow error

Outdoor liquid back detection error

Gas leak detection

Discharge temp. TD2 error

4-way valve inverse error

High-pressure protective operation

Outdoor fan IPDU error

IGBT short protection error

P29

01: Compressor 1 side 02: Compressor 2 side

61

Compressor position detective circuit system error

Accessory parts and Parts to be procured locally

Flow Selector Unit / INSTALLATION MANUAL

Accessory parts

Part name

RBM-Y1121FE

Q'ty

RBM-Y1801FE

Shape

Usage

ENGLISH

Installation Manual

Attached wire

(For power supply)

Attached wire

(For control wiring)

Heat insulating pipe

Heat insulating pipe

Attached pipe

Attached pipe

Attached pipe

Attached pipe

Wire joint

1

PRECAUTIONS FOR SAFETY

1

1

1

3

2

2

2

1

1

2

1

1

1

3

2

–

–

–

–

2

–

(Be sure to hand over to customers.)

For power supply from indoor unit (3-core, 6m)

For communication with indoor unit (5-core, 6m)

For heat insulating of suction gas, discharge gas, and gas pipe
connecting sections

For heat insulating of liquid pipe connecting sections

Ø9.5 - Ø6.4
connection pipe

Ø15.9 - Ø12.7
connection pipe

Ø15.9 - Ø9.5
connection pipe

Ø12.7 - Ø9.5
connection pipe

For connection with certain indoor units

• Ensure that all Lacal, National and International regulations are satisfied.

• Read this “PRECAUTIONS FOR SAFETY” carefully before lnstallation.

•

The precautions described below include the important items regarding safety. Observe them without fail.

• After the installation work, perform a trial operation to check for any problem.
Follow the Owner’s Manual to explain how to use and maintain the unit to the customer.

• Turn off the main power supply switch (or breaker) before the unit maintenance.

• Ask the customer to keep the lnstallation Manual together with the Owner’s Manual.

CAUTION

New Refrigerant Air Conditioner Installation

• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES

NOT DESTROY OZONE LAYER.

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

To prevent charging an incorrect refrigerant and refrigerating oil, the sizes of connecting sections of
charging port of the main unit and installation tools are charged 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. Moreover, do not use the existing piping because there are problems with
pressure-resistance force and impurity in it.

62

WARNING

Flow Selector Unit / INSTALLATION MANUAL

•

Ask an authorized dealer or qualified installation professional to install/maintain the air
conditioner.

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

• Turn off the main power supply switch or breaker before attempting any electrical work.

Make sure all power switches are off. Failure to do so may cause electric shock.

• Connect the connecting wire correctly.

If the connecting wire is connected in a wrong way, electric parts may be damaged.

•

When moving the air conditioner for the installation into another place, be very careful not to
enter any gaseous matter other than the specified refrigerant into the refrigeration cycle.

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

• Do not modify this unit by removing any of the safety guards or by by-passing any of the

safety interlock switches.

• Exposure of unit to water or other moisture before installation may cause a short-circuit of

electrical parts.

Do not store it in a wet basement or expose to rain or water.

• After unpacking the unit, examine it carefully if there are possible damage.

• Do not install in a place that might increase the vibration of the unit.

• To avoid personal injury (with sharp edges), be careful when handling parts.

• Perform installation work properly according to the Installation Manual.

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

•

When the air conditioner is installed in a small room, provide appropriate measures to ensure
that the concentration of refrigerant leakage occur in the room does not exceed the critical level.

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

adequately.

• Perform the specified installation work to guard against an earthquake.

If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.

• If refrigerant gas has leaked during the installation work, ventilate the room immediately.

If the leaked refrigerant gas comes in contact with fire, noxious gas may generate.

• After the installation work, confirm that refrigerant gas does not leak.

If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious
gas might generate.

• Electrical work must be performed by a qualified electrician in accordance with the

Installation Manual. Make sure the air conditioner uses an exclusive power supply.

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

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

forces applied to the terminals from affecting the terminals.

• Conform to the regulations of the local electric company when wiring the power supply.

Inappropriate grounding may cause electric shock.

• 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.

CAUTION

• Tighten flare nuts using a torque wrench according to the specified method.

If the flare nuts are tightened too much, they may later break and cause a refrigerant leak.

63

2

Flow Selector Unit / INSTALLATION MANUAL

INSTALLATION OF NEW REFRIGERANT AIR CONDITIONER

This air conditioner adopts the new HFC refrigerant (R410A) which does not deplete
the ozone layer.

• R410A refrigerant is apt to be affected by impurity such as water, oxidizing membrane, or oils because

the pressure of R410A refrigerant is higher than that of the former refrigerant by approx. 1.6 times.
Accompanied with adoption of the new refrigerant, refrigerating oil has been also changed. Therefore
pay attention so that water, dust, former refrigerant, or refrigerating oil does not enter into the
refrigerating cycle of the new refrigerant air conditioner during installation work.

• To prevent from mixing of refrigerant or refrigerating oil, the size of charge port of the main unit or

connecting section of installation tool differs from that of the air conditioner for the former refrigerant.
Accordingly the exclusive tools are required for the new refrigerant (R410A) as shown below.

• For connecting pipes, use the new and clean piping materials so that water or dust does not enter.

Required tools and cautions on handling

It is necessary to prepare the tools and parts as described below for the installation work.
The tools and parts which will be newly prepared in the following items should be restricted to the

exclusive use.

Explanation of symbols

●:

Newly prepared (It is necessary to use it properly exclusive to R410A separated from those for R22 or
R407C.)

❍:Former tool is available.

ENGLISH

Used tools Usage

Gauge manifold
Charging hose
Charging cylinder
Gas leak detector
Vacuum pump
Vacuum pump with counter- flow

preventive adapter
Flare tool
Bender
Refrigerant recovery device
Torque wrench
Pipe cutter
Refrigerant cylinder

Welding machine/
Nitrogen gas cylinder

Refrigerant charging balance

Vacuuming or charging of
refrigerant and operation check

Charges refrigerant
Checks gas leak
Vacuum drying
Vacuum drying

Flare processing of pipes
Bending processing of pipes
Recovers refrigerant
Tightens flare nut
Cuts pipes
Charges refrigerant

Welding of pipes

Charges refrigerant

Proper use of tools/parts

● Newly prepared, Exclusive to R410A

● Newly prepared, Exclusive to R410A

Unusable (Use the Refrigerant charging balance.)

● Newly prepared
Usable if a counter-flow preventive adapter is attached

❍: R22 (Existing article)

❍ : Usable by adjusting size
❍ : R22 (Existing article)

● Exclusive to R410A

● Exclusive for Ø12.7 mm, Ø15.9 mm
❍ : R22 (Existing article)

● Exclusive to R410A

ID : Refrigerant name entered

❍ : R22 (Existing article)

❍ : R22 (Existing article)

Refrigerant piping

• Piping material used for the conventional refrigerant cannot be used.

• Use copper pipe with 0.8 mm or more thickness for Ø6.4, Ø9.5, Ø12.7mm.

Use copper pipe with 1.0 mm or more thickness for Ø15.9mm.

• Flare nut and flare works are also different from those of the conventional refrigerant.

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

64

3

Flow Selector Unit / INSTALLATION MANUAL

SELECTION OF INSTALLATION PLACE

CAUTION

Do not install the air conditioner at a place where combustible gas may leak.

If gas leaks and is collected at surrounding the unit, the production of fire may be caused.

Upon customer’s approval, install the air conditioner at a place where satisfies the following
conditions.

• Place where it can be installed horizontally.

• Place which can reserve a sufficient service space for safe maintenance or check.

• Place where there is no problem even if the drained water flows.

Apply electric insulation between metal section of the building and metal section of the air
conditioner in conformance with the Local Regulation.

Avoid the following places.

• Salty place (seaside area) or place with much gas sulfide (hot spring area)

(If selecting such a place, a special maintenance is required.)

• Place where oil (including machine oil), steam, oil smoke or corrosive gas generates.

• Place where a device generating high frequency (inverter, non-utility generator, medical apparatus,

or communication equipment) is set. (A bad influence may generate by malfunction of the air
conditioner, control error, or noise for such equipment.)

Installation space

• Make space for installation and service. (Make space to the electrical parts box cover side for service.)

• When installing the unit inside the ceiling, be sure to create a check port.
The check port is required when the unit is installed and serviced. (Check port: 450 x 450 or more)

• Keep a clearance of 50 mm or more between the top panel of the unit and the ceiling.

• The length of a connection pipe to the indoor unit should be 15 m or less.

<Installation Space>

<RBM-Y1121FE, RBM-Y1801FE>

or

50

more

200 or more

<RBM-Y1121FE (When attached pipes are used)>

(156)

50

or

more

200 or more

or

50

more

Refrigerant pipe connecting port
(Discharge gas)

Refrigerant pipe connecting port
(Liquid)

Refrigerant pipe connecting port
(Suction gas)

(159)

Outdoor unit side

500 or more

50

or

more

Indoor unit side

Refrigerant pipe connecting
port (Liquid)

Refrigerant pipe connecting
port (Gas)

Hanging bracket

Electrical parts
box cover

Check port,
450 x 450

(118)

(159)

300 or more

50

or

more

(118)

300 or more

65

4

Flow Selector Unit / INSTALLATION MANUAL

INSTALLATION OF FLOW SELECTOR UNIT

WARNING

Install the unit securely in the place to sufficiently withstand the weight of the unit.

If the foundation is not sturdy enough, the unit may fall and cause personal injury.

Perform a specified installation work to guard against earth quake.

Improper installation may cause the unit to fall.

REQUIREMENT

To prevent damage on the Flow Selector unit or personal injury, follow the instructions below.

• Do not step, or put any heavy object on the packed Flow Selector unit.

• When carrying the Flow Selector unit, hold the two hanging brackets and be careful not to apply

excessive force to the refrigerant pipes.

External View

Outdoor unit side Indoor unit side

Refrigerant pipe connecting
port (Discharge gas)

Refrigerant pipe connecting
port (Liquid)

Refrigerant pipe connecting
port (Suction gas)

320 (Hanging bolt pitch)

250

Refrigerant pipe
connecting port (Liquid)

Refrigerant pipe
connecting port (Gas)

Hanging bracket

ENGLISH

154

21

160

57

39

44

87

190

(94)

(55)

(99)

This coils is on
Y1801FE only.

66

Earth
terminal

(55)

(99)

31

79

54

75

4

Flow Selector Unit / INSTALLATION MANUAL

INSTALLATION OF FLOW SELECTOR UNIT

(continued)

Installing hanging bolts

• Considering piping and wiring work after hanging the Flow Selector unit, determine the installation
position and direction.

• After determining the installation position of the Flow Selector unit, install the hanging bolts.

• For hanging bolt pitch, see the External View.

• When the ceiling is already installed, draw the pipes to the position where they are to be connected
before hanging the unit.

Procure hanging bolts and nuts locally for installing the unit.

Hanging bolt
Nut
Flat washer

M10 (mm) or 3/8
M10 (mm) or 3/8

M10 (mm)

2 pieces
6 pieces
4 pieces

Ceiling preparation

Because ceiling preparation depends on the building structure, consult with the architect or interior finisher.
After removing the ceiling panels, it is important to reinforce the ceiling frames to prevent ceiling panel

vibration and to keep the ceiling horizontal.

Installation of hanging bolts

Use M10(mm) or 3/8 hanging bolts (2 pcs, to be local procure).
Matching to the existing structure, set pitch according to size in the unit external view as shown below.

New concrete slab Steel flame structure

Install the bolts with insert brackets or anchor
bolts.

Reinforcing
steel

(Blade type

bracket)

(Side type

bracket)

Anchor bolt

(Pipe hanging

anchor bolt)

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.

Installing Flow Selector unit

• Attach the nuts (M10 (mm) or 3/8: to be local procure) and flat washers (M10: to be local procure) to the
hanging bolts.

• Put the washers over and under the T-groove of the hanging brackets of the Flow Selector unit to hang
down the unit.

• Using a level vial, check that the four sides are horizontal. (Horizontal degree: Within 5 mm).

Level vial (Horizontal

REQUIREMENT

Hanging bolt

degree: Within 5 mm)

Flow Selector unit

Hanging bolt
(M10 (mm) or 3/8)

Nut
(M10 (mm) or 3/8)

10 to 15 mm

Nut
(M10 (mm) or 3/8)

Procure the hanging bolts,
washers, and nuts locally.

M10 (mm) Flat washer

M10 (mm) Flat washer
To prevent the bolt from

coming off, attach the
washer just under the
hanging bracket as shown
in the figure.

Install the Flow Selector unit with the correct direction as shown in the figure.
If installed with incorrect direction, the Flow Selector unit will not operate properly.

67

5

Flow Selector Unit / INSTALLATION MANUAL

REFRIGERANT PIPING

WARNING

If refrigerant gas has leaked during the installation work, ventilate the room immediately.

If the leaked refrigerant gas comes in contact with fire, noxious gas may be generated.

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 fan heater, cooking stove
or heating unit, noxious gas may be generated.

Permissible pipe length and permissible height difference

The length of a connection pipe to the indoor unit should be 15 m or less.
For details, refer to the installation manual attached to the outdoor unit.

REQUIREMENT

When the refrigerant pipe is long, set the support brackets to fix the pipe at intervals of 2.5 to 3 m.
If the pipe is not fixed, noise may be generated.

Be sure to use the flare nuts attached to the Flow Selector unit or ones for R410A.

Piping material and dimensions

Material

FS unit RBM-Y1121FE

Indoor unit 007-012

Indoor unit side pipe size (mm)

Outdoor unit side pipe size (mm)

* Use pipes attached with the FS unit.

The accessary pipes are not flared. Flare them before using its.

MM

Suction gas pipe

Discharge gas pipe

Seamless phosphorus deoxidized copper pipe for air-conditioning

✽✽

✽✽✽✽✽✽

✽–AP

✽✽✽

✽✽

✽✽✽✽✽✽

Gas pipe

Liquid pipe

Liquid pipe

*Ø9.5
*Ø6.4

*Ø12.7

*Ø9.5
*Ø6.4

015-018

*Ø12.7

*Ø6.4

*Ø12.7

*Ø9.5
*Ø6.4

024-030

Ø15.9

Ø9.5
Ø15.9
Ø12.7

Ø9.5

RBM-Y1801FE

036-056

Ø15.9

Ø9.5
Ø15.9
Ø12.7

Ø9.5

ENGLISH

<RBM-Y1221FE (Attached pipes are used for indoor unit 007 to 018 model.)>

Attached pipe Flare

Pipe procured locally

Discharge gas pipe

Liquid pipe

Suction gas pipe

<RBM-Y1121FE, RBM-Y1801FE (For indoor unit 024 to 056 model.)>

Pipe procured locally

Discharge gas pipe

Liquid pipe

Suction gas pipe

Brazing

Flare

68

Flare

Attached pipe

Brazing

Pipe procured locally

Gas pipe
Liquid pipe

Flare

Pipe procured locally

Gas pipe

Liquid pipe

5

Flow Selector Unit / INSTALLATION MANUAL

REFRIGERANT PIPING (continued)

Pipe forming/End positioning

Flaring

1. Cut the pipe with a pipe cutter.

90°

Obliquity

Roughness

Warp

2. 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.

A

Flaring diam. meter size : A (Unit : mm)

Outer diam. of

copper pipe

9.5

12.7

15.9

R410A R22

13.2

16.6

19.7

+0

A

-0.4

13.0

16.2

19.2

Projection margin in flaring : B (Unit : mm)

B

Rigid (Clutch type)

Outer diam. of

copper pipe

9.5

12.7

15.9

R410A tool used

R410A R22

0 to 0.5
0 to 0.5
0 to 0.5

(Same as left)
(Same as left)
(Same as left)

Conventional tool used

R410A R22

1.0 to 1.5

1.0 to 1.5

1.0 to 1.5

0.5 to 1.0

0.5 to 1.0

0.5 to 1.0

* 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.

Connection of refrigerant pipe

Connect all the refrigerant pipes with flare
connecting work.

• Since the atmospheric pressure only is sealed

as the sealing gas, it is not abnormal that
“Pushu...” sound is not heard when the flare nut
is removed.

• Refer to the following table for tightening torque.

Connecting pipe

outer diam. (mm)

Ø9.5
Ø12.7
Ø15.9

Tightening torque

(N·m)

33 to 42 (3.3 to 4.2 kgf·m)
50 to 62 (5.0 to 6.2 kgf·m)
68 to 82 (6.8 to 8.2 kgf·m)

Re-tightening

torque (N·m)

42 (4.2 kgf·m)
50 (5.0 kgf·m)
68 (6.8 kgf·m)

Imperial (Wing nut type)

Outer diam. of copper pipe R410A R22

9.5

12.7

15.9

1.5 to 2.0

2.0 to 2.5

2.0 to 2.5

• Be sure use a double
spanner for pipe connecting
work of the indoor unit.

Work using double spanner

REQUIREMENT

If an excessive torque is applied, the nut may
crack depending on the installation conditions.

1.0 to 1.5

1.5 to 2.0

1.5 to 2.0

69

Airtight test/Air purge, etc.

Flow Selector Unit / INSTALLATION MANUAL

For airtight test, air purge, addition of refrigerant, and gas leak check, follow the Installation Manual
attached to the outdoor unit.

REQUIREMENT

Be sure to use the tool such as charge hose exclusive to R410A.
Do not turn on the power until the airtight test and the vacuuming have finished. (If turning on the

power, the incorporated PMV is closed fully and the period until the vacuuming finishes elongates.)

Open fully valves of the outdoor unit

Gas leak check

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

REQUIREMENT

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

Heat insulating process

Perform heat insulating for pipes at liquid side and gas
side separately.

In cooling time, temperature at both liquid and gas
sides becomes lower.

Therefore, perform heat insulating process sufficiently
to avoid dewing.

• For heat insulator of pipe at gas side, be sure to use
one with heat-resisting temp. 120°C or more.

• Using the attached heat insulating pipe, perform heat
insulating process securely for pipe connecting part
of the FS units without clearance.

FS unit

Heat insulating
pipe (Attached)

Union

Flare nut

Binding band
(Local supply)

Heat insulator

ENGLISH

REQUIREMENT

Apply the Heat insulation to the pipe connecting section of the FS unit securely up to the root without
exposure of the pipe. (The pipe exposed to the outside causes water leak.)

70

6

Flow Selector Unit / INSTALLATION MANUAL

ELECTRIC WORK

WARNING

1. Using the specified wires, ensure to connect the wires, and fix wires securely so that the

external strength of the wires do not transmit to the connecting part of the terminals.

Incomplete connection or fixation may cause a fire, etc.

2. Be sure to connect earth wire. (Grounding work)

Do not connect the earth wire to gas pipe, city water pipe, lightning rod, or the earth wire of
telephone.
Incomplete grounding causes an electric shock.

3. For electric work, strictly follow to the Local Regulation in each country and the Installation

Manual, and use an exclusive circuit.

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

CAUTION

Be sure to install an earth leakage breaker.

If an earth leakage breaker is not installed, an electric shock may be caused.

REQUIREMENT

• Perform the electric wiring so that it does not come to contact with the high-temperature part of the

pipe.
The coating may melt resulted in an accident.

• After connecting wires to the terminal blocks, provide a trap and fix wires with the wire clamp.

• Store 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.

71

Wire connections

Flow Selector Unit / INSTALLATION MANUAL

Use the supplied, dedicated wires.

REQUIREMENT

• Check that power is not supplied to the indoor unit before connecting wires.

• For safety, connect wires to the Flow Selector unit first.

• Be sure to put wires through the wire connecting ports on the Flow Selector unit and the indoor unit.

Connection diagram

• Power is supplied from the connected indoor unit.

• Connect the attached wires (power supply / control wiring) between the Flow Selector unit and the

indoor unit.

Connect wires as shown in the below figure.

• If the distance between indoor unit and FS unit exceeds 5m, connect by using the extension cable kit

(RBC-CBK15FE). (Sold separately)

Flow Selector Unit Indoor Unit

ENGLISH

RBM-Y1801FE Only

SVSSVS SVSS

SVDCOM SVS

BLU

ORN

WHI

SVDD

SVDD

YEL

SVD

SVSS

BRW

1

3

1

CN01

(RED)

Control P.C. Bord
MCC-1431

Earth screw

113

3

CN10
(WHI)

CN02
(GRN)

312
321

45

9977553

54

Attached wire (Power Supply)

Control P.C. Bord
for indoor unit

51234

CN81

45213

(BLK)

Attached wire (Control wiring)

11

33

CN67
(BLK)

Power Supply
Single Phase
220-240V 50Hz

S(N)R(L)

Indoor Unit
Earth screw

Flow Selector unit

• Remove the fixing screws (4 parts) from the cover of the Flow Selector unit.

• Connect the connector (red) of the attached wire (power supply) to CN01 on the control P.C. board.

• Connect the ring terminal of the attached wire (power supply) to the earth screw.

• Connect the connector (green) of the attached wire (control wiring) to CN02 on the control P.C. board.

• Secure the two attached wires with the attached cord clamp.

(Be careful not to apply tension to the wires and connectors.)

• Check that the wires are not pinched, and then attach the cover.

Earth screw

Fixing screw (4 parts)

72

Cord clamp
(Control wire)

CN01 (Red)

Control P.C. board

Cord clamp
(Power supply)

Attached wire
(Control wiring)

Attached wire
(Power supply)

CN02 (Green)

6

Flow Selector Unit / INSTALLATION MANUAL

ELECTRIC WORK

(continued)

Indoor unit

See also the Installation Manual supplied with the indoor unit.

• Remove the electrical parts box cover from the indoor unit.

• Connect the fastons (R(L) and S(N)) on the attached wire (power supply) to a free area on the R(L),

S(N) terminal block for power supply.
* When the indoor unit is the high wall type or concealed duct high static pressure type, connect as follows.

Connect the wire to the lead wires with wire joint on the R(L), S(N) terminal block for power supply,
using the following procedure:

Cut the wire joint on each lead wire, and cut the fastons (R(L) and S(N)) on the attached wire
(power supply). Then check the R(L) and S(N) phases, and connect the wire and the lead wires
with the attached wire joints.

• Connect the ring terminal of the attached wire (power supply) to the earth screw.

• Connect the connector (black) of the attached wire (control wiring) to CN081 on the Indoor P.C. board.

• Secure the two attached wires with the attached cord clamp.
(Be careful not to apply tension to the wires and connectors.)

• Check that the wires are not pinched, and then attach the cover.

■■

■ Connections

■■

4-way Air Discharge Cassette Type (MMU-AP✽✽1H Series)

CN081

Indoor P.C. board

R(L), S(N) terminal
block for power supply

Earth screw
for FS unit

Earth screw

Faston connection

R(L) S(N)

U1 U2 A B

Clamp with remote
controller lead wires

Cord clamp

Power supply

Attached wire (Control wiring)

Attached wire (Power supply)

73

2-way Air Discharge Cassette Type (MMU-AP✽✽1WH Series)

Flow Selector Unit / INSTALLATION MANUAL

Attached wire

(Power supply)

Attached wire
(Control wiring)

Indoor P.C. board

Cord clamp

Power supply

Earth screw

R(L) S(N)

ENGLISH

FOR INTER-UNIT FOR AI-NET

FOR REMOTE CONTROL

R(L), S(N) terminal

DONíT APPLY 220-240V

block for power supply

CN081 (Black)

Faston connection

Earth screw
for FS unit

1-way Air Discharge Cassette Type (MMU-AP✽✽1SH Series)
Floor Standing Type (MMF-AP✽✽1H Series)

Indoor P.C. board Faston connection

Earth screw for FS unit

Attached wire
(Control wiring)

CN081 (Black)

Cord clamp

Power supply

74

R(L) S(N)

R(L), S(N) terminal block
for power supply

DONíT APPLY 220-240V

FOR INTER-UNIT

FOR REMOTE CONTROL

Attached wire
(Power supply)

Cord clamp

6

Flow Selector Unit / INSTALLATION MANUAL

ELECTRIC WORK (continued)

1-way Air Discharge Cassette Type (MMU-AP✽✽1YH Series)

CN081

Indoor P.C. board

R(L), S(N) terminal
block for power supply

Cord clamp

Attached wire
(Control wiring)

Earth screw for FS unit

Attached wire
(Power supply)

Earth screw

Concealed Duct Standard Type (MMD-AP✽✽1BH Series)

Indoor P.C. board

CN081

Faston connection

Power supply

R(L), S(N) terminal block
for power supply

Earth screw
for FS unit

Earth
Screw

75

Cord clamp

Attached wire
(Power supply)

Power supply
Attached wire
(Control wiring)

Concealed Duct High Static Pressure Type (MMD-AP✽✽1H Series)

Flow Selector Unit / INSTALLATION MANUAL

Indoor P.C. board Wire joint (Attached)

CN081 (Black)

ENGLISH

R(L), S(N) terminal
block for power supply

Secure here

Attached wire (Control wiring)

Earth screw
for FS unit

Earth
screw

Attached wire
(Power supply)

Under Ceiling Type (MMC-AP✽✽1H Series)

R(L), S(N) terminal

Indoor P.C. board

Faston connection

block for power supply

Cord clamp

Power supply
Connect to the lead wires (red and white)
on R(L) and S(N).

Attached wire
(Control wiring)

Cord clamp

CN081 (Black)

Earth screw

Earth screw
for FS unit

76

R(L) S(N)

Cord
clamp

DON’T APPLY 220-240V

FOR INTER-UNIT

FOR REMOTE CONTROL

Attached wire
(Power supply)

Power supply

6

Flow Selector Unit / INSTALLATION MANUAL

ELECTRIC WORK (continued)

High Wall Type (MMK-AP✽✽1H Series)

CN081
(Black)

Indoor P.C. board

R(L), S(N)
terminal block for
power supply

Earth screw

Connect to the lead wires

Power supply

(red and white) on R(L) and S(N).

Wire joint (Attached)

Attached wire (Control wiring)

Earth screw for FS unit

Cord clamp

Attached wire (Power supply)

77

Floor Standing Cabinet Type (MML-AP✽✽1H Series)

Flow Selector Unit / INSTALLATION MANUAL

Earth screw

Attached wire
(Control wiring)

Cord clamp

Earth screw

Attached wire
(Power supply)

for FS unit

R(L), S(N) terminal block
for power supply

Indoor P.C. board CN081 (Black)

Faston connection

ENGLISH

Floor Standing Concealed Type (MML-AP✽✽1BH Series)

Indoor P.C. board

CN081

Cord clamp

Faston connection

R(L) S(N)

Power supply

Earth screw

Earth screw for FS unit

DONíT APPLY 220-240V

FOR INTER-UNIT

FOR REMOTE CONTROL

Attached wire
(Power supply)

R(L), S(N) terminal
block for power supply

Attached wire
(Control wiring)

78

2 CHOME 12-32, KONAN, MINATOKU, TOKYO, 108-0075, JAPAN