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Mitsubishi Electric MSC-A07YV Operating Instructions Manual

MSC-A12YV MSC-A09YV

Made by: Mitsubishi Electric
Type: Operating Instructions
Category: Air Conditioner
Pages: 13
Size: 0.72 MB

 

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SPLIT-TYPE AIR CONDITIONERS

OPERATING INSTRUCTIONS

OPERATING INSTRUCTIONS

For customers

To use this unit correctly and safely, be sure to read this operating instructions
before use.

Bedienungsanleitung

Für Kunden

Um diese Einheit richtig und sicher zu verwenden, unbedingt diese Bedienungs-
anleitung vor der Inbetriebnahme durchlesen.

NOTICE D’UTILISATION

A l’attention des clients

Pour avoir la certitude d’utiliser cet appareil correctement et en toute sécurité, veuillez
lire attentivement cette notice d’instructions avant de mettre l’appareil en fonction.

GEBRUIKSAANWIJZING

Voor de klant

Om dit apparaat op de juiste manier en veilig te gebruiken, dient u eerst deze
gebruiksaanwijzing aandachtig door te lezen.

MANUAL DE INSTRUCCIONES

Para los clientes

Para emplear correctamente este aparato y por razones de seguridad debe leer
este manual de instrucciones de manejo antes de su utilización.

LIBRETTO D’ISTRUZIONI

Per gli utenti

Per utilizzare correttamente quest’unità, leggere questo libretto d’istruzioni atten-
tamente e per intero.

√¢∏°π∂™ §∂π∆√Àƒ°π∞™

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fiÙÈ ¤¯ÂÙ ‰È·‚¿ÛÂÈ ·˘Ùfi ÙÔ ÂÁ¯ÂÈÚ›‰ÈÔ Ô‰ËÁÈÒÓ ÚÈÓ ·fi ÙËÓ ¯Ú‹ÛË.

INSTRUÇÕES DE OPERAÇÃO

Para os clientes

Para utilizar esta unidade correctamente, certifique-se de que lê estas instruções
de operação antes da utilização.

BRUGSANVISNING

Til kunden

Læs denne brugsanvisning før brugen så korrekt og forsvarlig anvendelse af klima-
anlægget sikres.

BRUKSANVISNING

För kunder

För att använda enheten på rätt och säkert sätt ska denna bruksanvisning läsas
innan enheten tas i bruk.

‹fiLETME TAL‹MATLARI

Sat›n al›c›lar için

Bu birimi do¤ru ve güvenli olarak çal›flt›rmak için, kullanmadan önce bu iflletme
talimatlar›n› mutlaka okuyun.

РУКОВОДСТВО ПО ЭКСПЛУАТАЦИИ

Для пользователей

Для обеспечения правильного и безопасного использования прибора следует
до начала его эксплуатации внимательно прочитать данное руководство.

English

Deutsch

Français

Nederlands

Español

Italiano

∂ÏÏËÓÈο

Português

Dansk

Svenska

Türkçe

INDOOR UNIT

MSC-A07YV
MSC-A09YV
MSC-A12YV

Русский

 


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2

ENCLOSURE

AIR OUTLET

This air conditioner is NOT intended for use by children or infirm persons without supervisions.

Do not use intermediate connection of the power supply cord or the extension cord and do not
connect many devices to one AC outlet.

A fire or an electric shock may result from poor contact, poor insulation, exceeding the permissible
current, etc.

Do not scratch or process the power supply cord, etc.

Do not put heavy object on the power supply cord and do not scratch or process the cord. The cord may
be damaged and this may cause a fire or an electric shock.

Do not turn the breaker off/on or disconnect/connect the power supply plug during operation.

This may cause a fire due to spark, etc.

Be sure to turn off the breaker or disconnect the power supply plug absolutely after switching the indoor
unit off with the remote controller.

Do not expose your skin directly to cool air for a long time.

This could damage your health.

The customer should not install this unit.

If this is done incorrectly, it may cause a fire, an electric shock, or injury from the unit falling, water
leaking, etc. Consult your dealer.

Do not insert your finger or a stick, etc. into the air inlet/outlet.

Since the fan rotates at high speed, this may cause an injury.

Young children should be supervised to ensure that they do not play with the air conditioner.

When an abnormality (burning smell, etc.) occurs, stop the air conditioner and disconnect the power
supply plug or turn off the breaker.

If the unit continues to be operated in an abnormal condition, it may cause a fire, trouble, etc. In this case,
consult your dealer.

Repairs or relocation should not be done by the customer.

If this is done incorrectly, it may cause a fire, an electric shock, or injury from the unit falling, water
leaking, etc. Consult your dealer.

If the power supply cord is damaged, it must be replaced by the manufacturer or its service agent in order
to avoid a hazard.

When the air filter is to be removed, do not touch the metal parts of the indoor unit.

This may cause an injury.

Do not use an insecticide or flammable spray.

This may cause a fire or deformation of the cabinet.

Do not put a pet or houseplant where it will be exposed to direct airflow.

This could injure the pet or plant.

Do not leave the unit on an installation stand which is damaged.

The unit may fall and this may cause an injury.

Do not step onto an unstable bench when maintaining the unit, etc.

This may cause an injury, etc. if you fall down.

Do not pull the power supply cord.

The core wire of the power supply cord may be disconnected and this may cause a fire.

Do not charge or disassemble the batteries and do not throw them into a fire.

This may result in leakage, fire or an explosion.

Do not operate the unit for a long time in high humidity, e.g. leaving a door or window open.

In the cooling mode, if the unit is operated in a room with high humidity (80% RH or more) for a long time,
water condensed in the air conditioner may drop and wet or damage furniture, etc.

Do not use the unit for special purposes.

Do not use this air conditioner to preserve precision devices, food, animals, plants and art objects.
This may cause deterioration of quality, etc.

Do not put a stove, etc. where they are exposed to direct airflow.

This may cause imperfect combustion.

 

WARNING

 

CAUTION

CONTENTS

SAFETY PRECAUTIONS ........................................................................................................................................................ 2
NAME OF EACH PART ............................................................................................................................................................ 3
PREPARATION BEFORE OPERATION .................................................................................................................................. 4
I FEEL... AUTO OPERATION ................................................................................................................................................... 6
MANUAL OPERATION (COOL, DRY, HEAT/FAN) ................................................................................................................... 7
AIR FLOW VELOCITY AND DIRECTION ADJUSTMENT ...................................................................................................... 7
ECONO COOL OPERATION ................................................................................................................................................... 8
TIMER OPERATION (ON/OFF TIMER) ................................................................................................................................... 8
WHEN THE AIR CONDITIONER IS NOT GOING TO BE USED FOR A LONG TIME ............................................................ 8
MAINTENANCE ....................................................................................................................................................................... 8
CLEANING THE CATECHIN AIR FILTER ................................................................................................................................ 9
REPLACEMENT OF THE AIR CLEANING FILTER ................................................................................................................. 9
BEFORE CONTACTING THE SERVICE REPRESENTATIVE, CHECK THE FOLLOWING AGAIN ...................................... 10
WHEN YOU THINK THAT TROUBLE HAS OCCURRED ...................................................................................................... 10
INSTALLATION, RELOCATION AND INSPECTION .............................................................................................................. 11
SPECIFICATIONS ................................................................................................................................................................. 11

SAFETY PRECAUTIONS

Since rotating parts and parts which could cause an electric shock are used in this product, be sure to read
these “Safety Precautions” before use.

Since the cautionary items shown here are important for safety, be sure to observe them.

Marks and their meanings

 WARNING:

Incorrect handling could cause a serious hazard, such as death, serious injury, etc. with a high prob-
ability.

 CAUTION:

Incorrect handling could cause a serious hazard depending on the conditions.

Meanings of symbols used in this manual

The colour of the sticker affixed to the unit is written in the parentheses.

:

Be sure not to do.

:

Be sure to follow the instruction.

(Black)

:

Never insert your finger or stick, etc.

(Black)

:

Never step onto the indoor/outdoor unit and do not put anything on them.

(Yellow)

:

Danger of electric shock. Be careful.

(Blue)

:

Be sure to disconnect the power supply plug from the power outlet.

(Blue)

:

Be sure to shut off the power.

After reading this manual, keep it together with the installation manual in a handy place for easy reference.

Warning mark positions and safety devices

FRONT PANEL

ENCLOSURE

 


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3

When the unit is to be cleaned, switch it off and disconnect the power supply plug or turn off the
breaker.

Since the fan rotates at high speed during operation, this may cause an injury.

When the unit is not going to be used for a long time, disconnect the power supply plug or turn off
the breaker.

Otherwise, dirt may collect and this may cause a fire.

Replace the 2 batteries with new ones of same type.

Using an old battery together with a new one may result in heat generation, leakage or an explosion.

If liquid from the batteries gets onto your skin or clothes, wash it well with clean water.

If liquid from the batteries gets into your eyes, wash them well with clean water and consult a doctor at
once.

Ventilate well in using the unit with a stove, etc.

An oxygen shortage may occur.

Do not operate switches with wet hands.

This may cause an electric shock.

Do not clean the air conditioner with water.

Water may enter the unit and degrade the insulation. This may cause an electric shock.

Do not step or put anything on the indoor/outdoor unit.

This may cause an injury, etc. if you or something falls down.

 

WARNING

Consult your dealer for installation of the air conditioner.

 

CAUTION

Do not install the unit where flammable gas could leak.

If gas leaks and collects around the unit, it may cause an explosion.

Earth the unit.

Do not connect the earth to a gas pipe, water pipe, lightning rod or the earth of a telephone. If the
earthing is incorrect, it may cause an electric shock.

Install an earth leakage breaker depending on the place where the air conditioner is to be installed
(humid places, etc.).

If the earth leakage breaker is not installed, it may cause an electric shock.

Drain should be fully drained.

If the drainage route is incomplete, water may drop from the unit. This may wet and damage the furniture.

 

CAUTION

For installation

SAFETY PRECAUTIONS

NAME OF EACH PART

Indoor unit

Outdoor unit

Emergency operation switch

Operation Indicator lamp

Remote control
receiving section

Air inlet     (back and side)

Piping

Drainage hose

Air outlet

Drain outlet

Air cleaning filter
(White bellows type)

Vertical vane

Operation section

(When the front panel is opened)

Front panel

Air inlet

to Breaker

Power supply cord

Remote control
receiving section

Display section

Air outlet

Horizontal vane

Remote controller

Catechin air filter
(With deodorizer)

 


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4

ON/OFF

FAN

TOO

WARM

TOO

COOL

VANE

MODE

ECONO COOL

    STOP

     START

HR.

MIN.

I FEEL COOL

DRY

AMPM

AMPM

RESET CLOCK

HEAT
/FAN

Signal transmitting section

Operation display section

Operation select button

Fan speed control button

ECONO COOL button

On-timer button

CLOCK set button

HR.button
MIN.button
(Time set buttons)

Temperature buttons

Vane control button

Off-timer button

RESET button

(This diagram shows an overall view.)

Open the front lid.

NAME OF EACH PART

Remote controller

ON/OFF

TOO

COOL

AMPM

CLOCK

˚C

AMPM

TOO

WARM

PREPARATION BEFORE OPERATION

Auto restart function

These models are equipped with an auto restart function. If you do not want to use this function,
please consult the service representative because the setting of the unit needs to be changed.

Auto restart function is ...

When the indoor unit is controlled with the remote controller, the operation mode, the set temperature and the fan speed are
stored in the memory. If a power failure occurs or the main power is turned off during operation, “Auto restart function” sets
automatically to start operating in the same mode as the one set with the remote controller just before the shutoff of the main
power. (Refer to page 6 for details.)

Indoor unit

Insert the power supply plug into the power outlet and/or turn the breaker on.

WARNING:

Remove dirt from the power supply plug and insert the plug securely.
If dirt adheres to the plug or insertion is incomplete, it may cause a fire or an electric shock.

Remote controller

How to set the type

This remote controller setting needs to be switched according to the type of air conditioner (COOL
& HEAT or COOL ONLY).
If the setting is incorrect, the air conditioner does not operate normally. Therefore, check if the
setting corresponds to the type of your air conditioner. If it does not, correct the setting as shown
below.

Type

COOL & HEAT

COOL ONLY

Slide switch

Position of the
slide switch

ON/OFF (operate/

stop) button

 


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5

Remote controller

How to set the batteries and the current
time

1

Remove the front lid and insert batteries.
Then reattach the front lid.

Insert the minus pole of the batteries first.
Check if the polarity of the batteries is correct.

2

Press the RESET button.

If the RESET button is not pressed, the remote con-
troller may not operate correctly.

3

Press the CLOCK set button.

4

Press the 

HR.

 and 

MIN.

 buttons (TIME SET

buttons) to set the current time.

Each time the 

HR.

 button is pressed, the set time

increases by 1 hour, and each time the 

MIN.

 button

is pressed, the set time increases by 1 minute.

5

Press the CLOCK set button again and close
the front lid.

FAN

VANE

MODE

ECONO COOL

    STOP

     START

HR.

MIN.

I FEEL COOL

DRY

RESET CLOCK

HEAT
/FAN

Press using a
thin stick.

Press using a
thin stick.

Insert the minus pole
of the batteries first.

Remote control-
ler holder

COOL & HEAT type

1

Press the EMERGENCY OPERATION switch.

Each time the EMERGENCY OPERATION switch is
pressed, the unit will operate in order of EMER-
GENCY COOL MODE, EMERGENCY HEAT MODE
and STOP MODE.
However, when the EMERGENCY OPERATION
switch is once pressed, the unit will operate in test
run for 30 minutes and then the operation mode
shifts to EMERGENCY MODE.

Details of EMERGENCY MODE are as shown be-
low. However, the temperature control does not
work for 30 minutes in test run and the unit is set
to continuous operation. The fan speed is set to
High in test run and shifts to Medium after 30 min-
utes.

Operation mode

COOL

HEAT

Set temperature

24°C

24°C

Fan speed

Medium

Medium

Horizontal vane

Auto

Auto

The operation mode is indicated by the Operation
Indicator lamp on the indoor unit as following fig-
ure.

Operation Indicator lamp

To stop the emergency operation, press the
EMERGENCY OPERATION switch once (in
case of EMERGENCY HEAT MODE) or twice
(in case of EMERGENCY COOL MODE).

When the remote controller cannot be used (emergency operation)

When the batteries of the remote controller run out or the remote controller malfunctions, the emergency operation
can be done using the EMERGENCY OPERATION switch.

COOL ONLY type

1

Press the EMERGENCY OPERATION switch.

When the EMERGENCY OPERATION switch is
pressed, the unit will operate in test run for 30 min-
utes at first and then the operation mode shifts to
EMERGENCY COOL MODE.

Details of EMERGENCY COOL MODE are as shown
below. However, the temperature control does not
work for 30 minutes in test run and the unit is set to
continuous operation. The fan speed is set to High
in test run and shifts to Medium after 30 minutes.

Operation mode

COOL

Set temperature

24°C

Fan speed

Medium

Horizontal vane

Auto

The operation mode is indicated by the Operation
Indicator lamp on the indoor unit as following fig-
ure.

Operation Indicator lamp

To stop the EMERGENCY COOL MODE, press
the EMERGENCY OPERATION switch again.

Each time the switch is pressed, the operation mode
alternates between the EMERGENCY COOL MODE
and STOP MODE.

Operation Indicator

Operation Indicator

Operation Indicator

EMERGENCY HEAT

EMERGENCY COOL

STOP

Operation Indicator

Operation Indicator

EMERGENCY COOL

STOP

Handling of the remote controller

The range that the signal can reach is about 6 m when
the remote controller is pointed at the front of the in-
door unit.

When a button is pressed, one or two beeps will be
heard from the indoor unit. If no sound is heard, op-
erate again.

Use the remote controller carefully.
If it is dropped, thrown or it gets wet, the remote con-
troller may not operate.

When installing on a wall, etc.

Install the remote controller holder in a position where
the signal reception sound (beep) can be heard from
the indoor unit when the 

ON/OFF

 button is pressed.

How to install/remove the remote controller

Installing :Insert the remote controller downward.
Removing :Pull it up.

Dry-cell batteries

 Reference for replacing batteries

Replace the batteries with new AAA alkaline batteries
in the following cases:

·

When the indoor unit does not respond to the remote
control signal.

·

When the display on the remote controller becomes
dim.

·

When a button of the remote controller is pressed, all
displays appear on the screen, and then disappear
immediately.

Do not use manganese batteries. The remote controller
could malfunction.

The service life of an alkaline battery is about 1 year.
However, a battery whose time limit is approaching
may be exhausted soon. The recommended usable
time limit is indicated (month/year) on the bottom of
the battery.

To prevent liquid leakage, take out all batteries when
the remote controller is not going to be used for a
long time.

 CAUTION:

If liquid from the batteries gets onto your skin or
clothes, wash it well with clean water.
If liquid from the batteries gets into your eyes, wash
them well with clean water and consult a doctor at
once.

Do not use rechargeable batteries.

Replace the 2 batteries with new ones of the same
type.

Dispose of exhausted batteries in the correct man-
ner.

PREPARATION BEFORE OPERATION

 


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6

With the “

 (I FEEL...)” auto operation mode, the optimum room condition can be set automatically

with a one-touch operation.

To start operation:

Press the 

ON/OFF

 button.

When the “

 (I FEEL...)” mode is selected, the air conditioner is automatically

controlled at the optimum temperature.

To stop operation:

Press the 

ON/OFF

 button.

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

If you feel slightly warm:

Press the 

TOO

WARM

 button to lower the temperature.

One press lowers the temperature by about 1°C.

If you feel slightly cool:

Press the 

TOO

COOL

 button to raise the temperature.

One press raises the temperature by about 1°C.

FAN

VANE

MODE

ECONO COOL

    STOP

     START

HR.

MIN

I FEEL COOL

DRY

HEAT
/FAN

I FEEL... AUTO OPERATION

Details of operation

According to the room temperature when the operation starts, the operation mode is automatically set to COOL, DRY or
HEAT. However, when operation is started again within 2 hours after it  is stopped, the same operation mode before the
operation is stopped is selected. The operation mode selected first is not changed even if the room temperature changes.
If the operation mode does not match the room condition, select the appropriate operation mode by pressing the 

MODE

button.

Details of auto operation

Operation state

This shows that the air conditioner is operating to reach the
target temperature. Please wait until the target temperature
is obtained.

This shows that the room temperature is approaching the
target temperature.

(In case of outdoor unit MXZ series only)
Please refer to Information for multi system air conditioner.
(Page 7)

Indication

Difference between target

temperature and room temperature

About 2°C or more

About 2°C or less

Lighted

Blinking

 

Not lighted

Operation Indicator

Description of “I FEEL...” mode

When  “

 (I FEEL...)” is not selected, press the 

MODE

button until it is set.

Each time the button is pressed, the operation mode is changed
in sequence: 

 (I FEEL...) 

 

 (COOL) 

   (DRY) 

 

(HEAT/FAN)

COOL & HEAT type

COOL ONLY type

Room temperature

Operation mode

Target temperature

Operation mode

Target temperature

when started

 (initial state)

 (initial state)

About 25°C or higher

COOL

About 24°C

COOL

About 24°C

About 25°C - 23°C

DRY

DRY

About 23°C or lower

HEAT

About 26°C

DRY

NOTE:
COOL: When the room temperature is 2°C higher than the set temperature, the set temperature may not be

changed since the air conditioner is operating to reach the target (set) temperature. In this case, please
wait until the room temperature drops to within 2°C of the set temperature and then change the set
temperature.

HEAT:

When the room temperature is 2°C lower than the set temperature, the set temperature may not be
changed since the air conditioner is operating to reach the target (set) temperature. In this case, please
wait until the room temperature rises to within 2°C of the set temperature and then change the set
temperature.

Details of display on the indoor unit

The operation indicator at the right side of the indoor unit indicates the operation state.

Operation indicator lamp

ON/OFF

FAN

TOO

WARM

TOO

COOL

VANE

MODE

ECONO COOL

    STOP

     START

HR.

MIN.

I FEEL COOL

DRY

AM

PM

CLOCK

˚C

AMPM

HEAT
/FAN

RESET CLOCK

Description of “AUTO RESTART FUNCTION”

These units are equipped with an auto restart function. When the main power is turned on, the air conditioner will start
operation automatically in the same mode as the one set with the remote controller before the shutoff of the main
power.

If the unit was set to off with the remote controller before the shutoff of the main power, it will remain stopped even after
the main power is turned on.

If the unit was in the emergency operation before the shutoff of the main power, it will start operation, when main power
comes on, in the same mode as the one set with the remote controller before the emergency operation.

If the unit is operated in “I FEEL...”  mode before power failure, the operation mode (COOL, DRY or HEAT) is not stored
in the memory. When the main power is turned on, the unit decides the operation mode by the initial room temperature
at restart and starts operation again.

 


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7

1

2

3

4

5

To select the COOL, DRY or HEAT/FAN mode:

1

Press the 

ON/OFF

 button.

2

Select the operation mode by pressing the 

MODE

 button.

Each time this button is pressed, the operation mode is changed in sequence:

 (I FEEL...) 

 

 (COOL) 

   (DRY) 

 

 (HEAT/FAN)

HEAT/FAN mode

Check the type of the air conditioner.

Type

Operation mode

COOL & HEAT

HEAT

COOL ONLY

FAN

To stop operation:

Press the 

ON/OFF

 button.

After the operation mode is set once, the operation starts in the same mode as
the one set previously from the next time by simply pressing the 

ON/OFF

 button.

MANUAL OPERATION (COOL, DRY, HEAT/FAN)

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

When the set temperature is to be changed:

Press the 

TOO

WARM

 button to lower the temperature. One press lowers the temperature by about 1°C.

Press the 

TOO

COOL

 button to raise the temperature. One press raises the temperature by about 1°C.

In HEAT operation

If the air conditioner absorbs too much heat from the air, it may be overloaded. Following a judgement made by the
microprocessor, the fan in the outdoor unit is automatically stopped to protect the air conditioner.
When the outdoor unit’s fan is stopped, frost may form on the outdoor unit, but this is not a problem.

In DRY operation

The temperature control (temperature setting) cannot be done.

The room temperature is slightly lowered in this operation mode.

The details of the display on the indoor unit are explained on page 6.

NOTE:
When the ambient temperature is too high, the room temperature may not reach the set temperature since the unit
operates to cool the room under a high load.

Information for multi system air conditioner (Outdoor unit: MXZ series)

Multi system air conditioner (Outdoor unit: MXZ series) can connect two or more indoor units with one outdoor
unit. According to the capacity, two or more units can operate simultaneously.

When you try to operate two or more indoor units with one outdoor unit simultaneously, one for the cooling and the other
for heating, the operation mode of the indoor unit that operates earlier is selected. The other indoor units that will start the
operation later cannot operate, indicating an operation state. (Refer to the table of Operation Indicator lamp on page 6.)
In this case, please set all the indoor units to the same operation mode.

When indoor unit starts the operation while the defrosting of outdoor unit is being done, it takes a few minutes (max. 10
minutes) to blow out the warm air.

In the heating operation, the indoor unit that does not operate may get warm or the sound of refrigerant flowing may be
heard. This is not a malfunction since the refrigerant continuously flows into the indoor unit that does not operate.

Description of “AUTO RESTART FUNCTION”

Refer to page 6.

AIR FLOW VELOCITY AND DIRECTION ADJUSTMENT

AIR FLOW velocity and direction can be selected as required.

To change the AIR FLOW velocity, press the 

FAN

 button.

Each time the button is pressed, the fan speed is changed in sequence:
   (Low) 

 

 (Med.) 

 

 (High) 

 

 (AUTO)

Use the 

 (High) notch to cool/heat the room more.

If the operating sound of the air conditioner disturbs your sleep, use the

 (Low) notch.

To change the AIR FLOW blowing direction vertically, press the

VANE

 button.

Each time the button is pressed, the angle of the horizontal vane is changed in
sequence: 

(1) 

 

(2) 

 

(3) 

 

(4) 

 (5) 

   (SWING) 

 (AUTO)

SWING OPERATION

Use the swing operation for the air flow to reach all corners of the room.

Recommended horizontal vane range

Use the  

  (AUTO) position usually.

Use position 

(1) or 

(2) in the COOL or DRY mode

and use positions 

(3) to

 (5) in the HEAT mode

when adjusting to your requirements.

HEAT

NOTE:
• In the cooling operation, when the air conditioner is operated with setting the horizontal vane to

 (4) or

 (5) for 1 hour, the AIR FLOW direction is automatically set to horizontal to prevent condensed water

from dropping.

• Adjust the vertical AIR FLOW direction using the remote controller. If the horizontal vane is moved manually, it may

cause trouble.

• In the heating operation, if the air flow temperature is too low or when defrosting is being done, the horizontal vane

position is set to 

(1).

ON/OFF

FAN

TOO

WARM

TOO

COOL

VANE

MODE

ECONO COOL

    STOP

     START

HR.

MIN.

I FEEL COOL

DRY

AM

PM

CLOCK

˚C

AMPM

HEAT
/FAN

RESET CLOCK

ON/OFF

FAN

TOO

WARM

TOO

COOL

VANE

MODE

ECONO COOL

    STOP

     START

HR.

MIN.

I FEEL COOL

DRY

AM

PM

CLOCK

˚C

AMPM

HEAT
/FAN

RESET CLOCK

COOL

DRY

Auto air flow direction control operation

When the AUTO mode is selected with the 

VANE

 but-

ton, the position of the horizontal vane is automati-
cally set to correspond to the operation mode for
effective operation.
(1) HEAT

When the air flow temperature is too low, the air is
blown out horizontally.

When the air flow temperature rises, the air is blown
out downwards.

(2) COOL, DRY

The air is blown out horizontally.

(3) FAN

The air is blown out downwards.

To change the horizontal direction of the air
flow, move the vertical vane manually.

Adjust the vane before operation starts.
Since the horizontal vane moves automatically, your
fingers may be caught.

 


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8

ECONO COOL OPERATION

Use this operation when you want to be comfortable in COOL mode even with energy saved.

ON/OFF

FAN

TOO

WARM

TOO

COOL

VANE

MODE

ECONO COOL

    STOP

     START

HR.

MIN.

I FEEL COOL

DRY

AM

PM

CLOCK

˚C

AMPM

HEAT
/FAN

RESET CLOCK

TIMER OPERATION (ON/OFF TIMER)

It is convenient to set the timer when you go to bed, when you get home, when you get up, etc.

How to set the ON timer

1

Press the 

     START

 button during operation.

Each time the button is pressed, the ON timer mode
alternates between ON and OFF.

2

Set the time of the timer using the 

HR.

 and

MIN.

 buttons.

Each time the 

HR.

 button is pressed, the set time in-

creases by 1 hour; each time the 

MIN.

 button is pressed,

the set time increases by 10 minutes.

To release the ON timer:

Press the 

     START

 button.

How to set the OFF timer

1

Press the 

    STOP

 button during operation.

Each time the button is pressed, the OFF timer mode
alternates between ON and OFF.

2

Set the time of the timer using the 

HR.

 and

MIN.

 buttons.

Each time the 

HR.

 button is pressed, the set time in-

creases by 1 hour; each time the 

MIN.

 button is pressed,

the set time increases by 10 minutes.

To release the OFF timer:

Press the 

    STOP

 button.

WHEN THE AIR CONDITIONER IS NOT GOING TO BE
USED FOR A LONG TIME

When it is not going to be used for a long
time:

1

Perform the FAN operation for 3 or 4 hours
to dry the inside of the air conditioner.

COOL & HEAT type:

To perform FAN operation, set the remote control-
ler to the highest temperature in the MANUAL COOL
mode. (Refer to page 7.)

COOL ONLY type:

Select the FAN mode. (Refer to page 7.)

2

Turn off the breaker and/or disconnect the
power supply plug.

 CAUTION:

Turn off the breaker or disconnect the power supply plug
when the air conditioner is not going to be used for a
long time.
Dirt may collect and this may cause a fire.

3

Remove the batteries from the remote con-
troller.

 CAUTION:

To prevent liquid leakage, take out all batteries when the
remote controller is not going to be used for a long time.

When the air conditioner is to be used
again:

1

Clean the air filter and install it in the indoor
unit.

(Refer to page 9 for cleaning instructions.)

2

Check that the air inlet and outlet of the in-
door/outdoor units are not blocked with any
obstacles.

3

Check that the earth is connected correctly.

 CAUTION:

Earth the unit.
Do not connect the earth to a gas pipe, water pipe, light-
ning rod or the earth of a telephone. If the earthing is
incorrect, it may cause an electric shock.

MAINTENANCE

Before starting maintenance

Turn off the breaker and/or disconnect the
power supply plug.

CAUTION:

When the unit is to be cleaned, switch it off and discon-
nect the power supply plug or turn off the breaker. Since
the fan rotates at high speed during operation, it may
cause an injury.

Cleaning the indoor unit

Clean the unit using a soft dry cloth.

If the dirt is noticeable, wipe the unit with a cloth
soaked in a solution of mild detergent diluted in luke-
warm water.

Do not use gasoline, benzine, polishing powder, or
insecticide. The unit may be damaged.

Perform the following operations while the unit is operat-
ing in the MANUAL COOL mode.

Press the 

ECONO COOL

 button.

When the   (ECONO COOL) operation is selected in COOL mode, the air
conditioner performs swing operation in various cycle according to the tempera-
ture of air conditioner.
Also SET TEMPERATURE is automatically set 2°C higher than in COOL mode.

To release the ECONO COOL operation:

Press the 

ECONO COOL

 button again.

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

When the 

VANE

 button is pressed or the operation mode is changed during

the ECONO COOL operation, ECONO COOL operation is released.

The 

FAN

 button, the 

TOO

WARM

 or 

TOO

COOL

 button and ON/OFF timer (explained below)

are available.

Programming timer operation

The ON timer and the OFF timer can be used in combination. The timer of the set time that is reached first will operate first.
(“ ” mark indicates the order of timer operations.)
• If the current time has not been set, the timer operation cannot be used.

NOTE:
If the main power is turned off or a power failure occurs while AUTO START/STOP timer is active, the timer setting is
cancelled. As these models are equipped with an auto restart function, the air conditioner starts operating with timer
cancelled at the same time that power is restored.

What is “ECONO COOL”?

Swing air flow (change of air flow) makes you feel cooler than constant air flow. So, even though the set temperature is
automatically set 2°C higher, it is possible to perform cooling operation with keeping comfort. As a result, energy can be saved.

 


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9

REPLACEMENT OF THE AIR CLEANING FILTER

When the capacity is lowered because of dirt, etc., it is necessary to replace the air cleaning filter.

Air cleaning filter replacement (about once every 4 months)

Catechin air filter

CLEANING THE CATECHIN AIR FILTER

Cleaning the catechin air filter (about once every 2 weeks)

3

After washing with water/lukewarm water, dry
the catechin air filter well in the shade.

Do not expose the catechin air filter to direct sun-
light or heat from a fire when drying it.

4

Install the catechin air filter.

1

Remove the catechin air filter.

CAUTION

When the catechin air filter is to be removed, do not touch
the metal parts of the indoor unit.
This may cause an injury.

2

Remove dirt from the catechin air filter us-
ing a vacuum cleaner or by washing the fil-
ter with water.

If the dirt is noticeable, wash the filter with a solu-
tion of mild detergent diluted in lukewarm water.

If hot water (50 °C or more) is used, the filter may
be deformed.

Open the front
panel, then
remove/replace
the filter.

Catechin air filter

Remove.

Install.

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

What is “Catechin air filter”?

The air filter is dyed with a natural material, catechin, that is contained in tea. The catechin air filter deodorizes
odor and noxious gases such as formaldehyde, ammonia, and acetaldehyde. Moreover, it restraints the activity of
the viruses adhering to the filter.

Air cleaning filter

1

Remove the catechin air filter.

2

Remove the air cleaning filter (White bellows
type).

3

Install a new air cleaning filter.

4

Install the catechin air filter and securely
close the front panel.

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Air cleaning filter

If the air cleaning filter is clogged, it may lower the unit’s capacity or cause condensation at the air outlet.

The air cleaning filter is disposable. The standard usable term is about 4 months. However, if the colour of the filter turns
to dark brown, replace the filter at once.

Optional parts Optional parts are available from your local dealer.

Name of parts

AIR CLEANING FILTER

Parts number

MAC-1300FT

 


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10

BEFORE CONTACTING THE SERVICE REPRE-
SENTATIVE, CHECK THE FOLLOWING AGAIN

Question

The air conditioner cannot
be operated for about 3 min-
utes when restarted.

Cracking sound is heard.

The air from the indoor unit
smells strange.

The fan stops during the
DRY operation.

The sound of water flowing
is heard.

The sound as burbling is
heard.

The room cannot be cooled
sufficiently.

Mist is discharged from the
air outlet of the indoor unit.

Answer (not a malfunction)

• This protects the air conditioner according to in-

structions from the microprocessor. Please wait.

• This sound is generated by the expansion/con-

traction of the front panel, etc. due to change in
temperature.

• The air conditioner may suck in an odor adher-

ing to the wall, carpet, furniture, cloth, etc. and
blow it out with the air.

• In DRY operation, the unit operates using the

same refrigerant circuit as in COOL operation.
DRY operation time has to be reduced in order
to lower humidity without much room tempera-
ture decreasing. So the compressor sometimes
stops, and at the same time the indoor fan stops.
This prevents water condensed on the heat ex-
changer from evaporating again.

• This is the sound of refrigerant flowing inside the

air conditioner.

• This is the sound of condensed water flowing in

the heat exchanger.

• This is the sound of the heat exchanger defrost-

ing.

• This sound is heard when the outside air is ab-

sorbed from the drain hose in turning on the
range hood or the ventilation fan and that makes
water flowing in the drain hose spout out.
This sound is also heard when the outside air
blows into the drain hose in case the outside wind
is strong.

• When a ventilation fan or a gas cooker is used

in a room, the cooling load increases, resulting
in an insufficient cooling effect.

• When the outside air temperature is high, the

cooling effect may not be sufficient.

• The cool air from the air conditioner rapidly cools

moisture in the air inside the room, and it turns
into mist.

WHEN YOU THINK THAT TROUBLE HAS OCCURRED

Question

The air conditioner cannot
be operated.

The room cannot be cooled
or heated sufficiently.

The air from the indoor unit
smells strange.

The display on the remote
controller does not appear
or it is dim. The indoor unit
does not respond to the re-
mote control signal.

When a power failure oc-
curs.

Check points or Remedy

• Is the breaker turned on?
• Is the fuse blown?
• Is the ON timer set? (Page 8)

• Is the temperature setting correct? (Page 7)
• Is the filter clean? (Page 9)
• Are there any obstacles blocking the air inlet or

outlet of the indoor or outdoor unit?

• Is a window or door open?

• Is the filter clean? (Page 9)

• Are the batteries exhausted? (Page 5)
• Is the polarity (+, -) of the batteries correct?

(Page 5)

• Are any buttons on the remote controller of other

electric appliances being pressed?

• Does the air conditioner start operating again?

If the air conditioner had operated before the
power failure, as these models are equipped with
an auto restart function, the air conditioner
should start operating again. (Refer to Descrip-
tion of “AUTO RESTART FUNCTION” on page
6.)

Question

The air flow direction
changes during operation.
The direction of the hori-
zontal vane cannot be ad-
justed with the remote con-
troller.

Water leaks from the out-
door unit.

White smoke is discharged
from the outdoor unit.

Air does not blow out soon
in the heating operation.

The operation is stopped
for about 10 minutes in the
heating operation.

Hissing sound is some-
times heard.

The room cannot be heated
sufficiently.

In a multi-unit system, the
indoor unit which is not op-
erating becomes warm and
a sound, similar to water
flowing, is heard from the
unit.

The air conditioner starts
the operation only with the
main power turned on,
though you do not operate
the unit with the remote
controller.

Answer (not a malfunction)

• When the air conditioner is operated in COOL

or DRY mode, if the operation continues with air
blowing down for 1 hour, the direction of the air
flow is automatically set to horizontal to prevent
condensed water from dropping.

• In the heating operation, if the air flow tempera-

ture is too low or when defrosting is being done,
the horizontal vane position is automatically set
to horizontal.

• During COOL and DRY operations, pipe or pipe

connecting sections are cooled and this causes
water to condense.

• In the heating operation, the defrosting opera-

tion makes water frozen on the outdoor unit melt
and drip down.

• In the heating operation, water condensed on

the heat exchanger drips down.

• In the heating operation, vapor generated by the

defrosting operation looks like white smoke.

• Please wait as the air conditioner is preparing

to blow out warm air.

• Defrosting of the outdoor unit is being done (De-

frosting operation).
Since this is completed in 10 minutes, please
wait. (When the external temperature is too low
and humidity is too high, frost is formed.)

• This is the sound when the flow of refrigerant

inside the air conditioner is switched.

• When the outside air temperature is low, the

heating effect may not be sufficient.

• A small amount of refrigerant continues to flow

into the indoor unit even though it is not operat-
ing.

• These models are equipped with an auto restart

function. When the main power is turned off with-
out stopping the air conditioner with the remote
controller and is turned on again, the air condi-
tioner will start operation automatically in the
same mode as the one set with the remote con-
troller just before the shutoff of the main power.

Even if the above items are checked, when the air conditioner does not
recover from the trouble, stop using the air conditioner and consult your
dealer.

In the following cases, stop using the air conditioner and consult your dealer.

When water leaks from the indoor unit.

When the left operation indicator lamp blinks.

When the breaker trips frequently.

The remote control signal may not be received in a room where an electronic
ON/OFF type fluorescent lamp (inverter-type fluorescent lamp, etc.) is used.

Operation of the air conditioner may interfere with radio or TV reception in
areas where the reception is weak. An amplifier may be required for the af-
fected device.

When thunder is heard, stop operation and disconnect the power supply plug
or turn off the breaker. Otherwise, the electrical parts may be damaged.

 


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11

INSTALLATION, RELOCATION AND INSPECTION

Installation place

Avoid installing the air conditioner in the following places.

Where flammable gas could leak.

CAUTION:

Do not install the unit where flammable gas could leak.
If gas leaks and collects around the unit, it may cause
an explosion.

Where there is much machine oil.

Salty places such as the seaside.

Where sulfide gas is generated such as a hot spring.

Where oil is splashed or where the area is filled with
oily smoke.

Where there is high-frequency or wireless equipment.

CAUTION:

• Earth the unit.

Do not connect the earth to a gas pipe, water pipe, lightning rod or the earth of a telephone. If the earthing is
incorrect, it may cause an electric shock.

• Install an earth leakage breaker depending on the place where the air conditioner is to be installed (humid places,

etc.).
If the earth leakage breaker is not installed, it may cause an electric shock.

Inspection and maintenance

When the air conditioner is used for several seasons, the capacity may be lowered due to dirt inside the unit.

Depending on the condition, an odor may be generated or dehumidified water may not drain out smoothly due to dirt,
dust, etc.

It is recommended that the unit be inspected and maintained (charged) by specialist in addition to normal maintenance.
Consult your dealer.

Operating sound considerations

Do not put an object around the air outlet of the outdoor unit. This may lower the capacity or increase the volume of the
operating sound.

If an abnormal sound is heard during operation, consult your dealer.

Relocation

When the air conditioner is to be removed or re-installed because of rebuilding, moving, etc., special techniques and work
are required.

 WARNING :

Repairs or relocation should not be done by the customer.
If this is done incorrectly, it may cause a fire, an electric shock, or an injury from the unit falling, water leaking, etc.
Consult your dealer.

Disposal

To dispose of this product, consult your dealer.

If you have any questions, consult your dealer.

WARNING :

If the air conditioner operates but does not cool or heat (depending on model) the room, consult your dealer since
there may be a refrigerant leak. Be sure to ask the service representative whether there is refrigerant leakage or not
when repairs are carried out.
The refrigerant charged in the air conditioner is safe. Refrigerant normally does not leak, however, if refrigerant gas
leaks indoors, and comes into contact with the fire of a fan heater, space heater, stove, etc., harmful substances will be
generated.

Electrical work

Provide an exclusive circuit for the power supply of the air conditioner.

Be sure to observe the breaker capacity.

WARNING :

• The customer should not install this unit.

If installation is done incorrectly, it may cause a fire, an electric shock, or injury from the unit falling, water leaking,
etc.

• Do not use intermediate connection of the power supply cord or the extension cord and do not connect many

devices to one AC outlet.
A fire or an electric shock may result from poor contact, poor insulation, exceeding the permissible current, etc.
Consult your dealer.

SPECIFICATIONS

MSH-A07YV

MSH-A09YV

MSH-A12YV

MSC-A07YV

MSC-A09YV

MSC-A12YV

MUH-A07YV

MUH-A09YV

MUH-A12YV

Cooling

Heating

Cooling

Heating

Cooling

Heating

2.3

2.5

2.55

3.05

3.5

3.9

0.715

0.69

0.795

0.84

1.09

1.08

9

10

35

38

40

0.62

1.00

1.00

36/31/25

36/31/25

39/32/25

40/33/26

39/33/26

47

49

Set name

Model

Indoor
Outdoor

Function
Power supply
Capacity

kW

Input

kW

Weight

Indoor

kg

Outdoor

kg

Refrigerant filling

kg

capacity (R410A)

IP code

Indoor
Outdoor

Permissible

LP ps

MPa

excessive
operating

HP ps

MPa

pressure

Indoor

dB(A)

Noise level

(High/Med./Low)
Outdoor

dB(A)

MS-A07YV

MS-A09YV

MS-A12YV

MSC-A07YV

MSC-A09YV

MSC-A12YV

MU-A07YV

MU-A09YV

MU-A12YV

Cooling

2.3

2.55

3.5

0.715

0.795

1.14

9

10

34

36

0.60

0.60

0.75

36/31/25

40/33/26

45

49

~ /N, 230V, 50Hz

IP20
IP24

1.64

4.15

NOTE:
1. Rating condition

Cooling —

Indoor:

27°C DB, 19°C WB

Outdoor:

35°C DB

Heating —

Indoor:

20°C DB

Outdoor:

7°C DB, 6°C WB

2. Guaranteed operating range

Indoor

Outdoor

Upper limit

32°C DB

43°C DB

Cooling

23°C WB

Lower limit

21°C DB

21°C DB

15°C WB

Upper limit

27°C DB

24°C DB

Heating

18°C WB

Lower limit

20°C DB

-10°C DB

-11°C WB

To prevent the effects
of a fluorescent lamp,
keep as far apart as
possible.

wall, etc.

Inverter-type
fluorescent lamp

Keep a space
to prevent the
picture
distortion or
the noise.

1 m

or more

Radio

100 mm or
more

Well-
ventilated
dry place

500 mm or
more

TV

Cordless
phone or
Portable
phone

3 m

or more

1 m

or more

The installation location of the outdoor unit should be
at least 3 m away from the antennas for TV sets,
radios, etc. In areas where the reception is weak, pro-
vide greater space between the outdoor unit and the
antenna of the affected device if operation of the air
conditioner interferes with radio or TV reception.

 


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HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

SG79Y267H01

This product is designed and intended for use in the residential,
commercial and light-industrial environment.

The product at hand is based on
the following EU regulations:

• Low Voltage Directive 73/23/ EEC
• Electromagnetic Compatibility Directive

89/336/ EEC

 


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