Mitsubishi MSY-A17NA, MS-A09WA, MS-A12WA, MSY-A15NA OPERATING INSTRUCTIONS

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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.

• Stop using the air conditioner and consult your dealer in case any trouble or abnormality occurs.

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

: Be sure not to do. : Be sure to follow the instruction. : Never insert your finger or stick, etc. : Never step onto the indoor/outdoor unit and do not put anything on them. : Danger of electric shock. Be careful. : 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 positions

ENCLOSURE

FRONT PANEL

AIR OUTLET

ENCLOSURE

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

•

WARNING

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 during operation.

• This may cause a fire due to spark, etc.

• Be sure to turn off the breaker 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.

Installation, 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.

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 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.

CAUTION

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 touch the air inlet or aluminum fin of the outdoor unit.

• This may cause an injury.

Do not put a vase or glass on the indoor unit.

• Water dropping into the indoor unit may deteriorate the insulation, causing electric shock.

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 place other electric appliances or furniture under the indoor/outdoor unit.

• Water may drip down from the unit, and this may cause damage or malfunction to them.

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.

SAFETY PRECAUTIONS NAME OF EACH PART

Do not operate the unit at low outside temperature (less than 14°F) in the cooling mode.

• In the cooling mode, if the unit is operated at low outside temperature (less than 14°F), 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.

When the unit is to be cleaned, switch it off and 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, turn off the breaker.

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

Replace the 2 batteries of the remote controller 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 or put a vase or glass on it.

• 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.

For installation

• Consult your dealer for installation of the air conditioner. Since special techniques and work are required, installation should not be done by the customer. If this is done incorrecty, it may cause a fire, an electric shock, injury or water leaking.

Do not install the unit where flammable gas could leak.

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

Ground the unit.

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

Install a Ground Fault Interrupt (GFI) circuit breaker depending on the place where the air conditioner is to be installed (humid places, etc.).

• If the Ground Fault Interrupt (GFI) circuit 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

WARNING

CAUTION

Indoor unit

Air inlet

Air cleaning filter (Anti-Allergy Enzyme Filter, Blue bellows type)

Air filter (Catechin)

Vertical vane

Horizontal vane

Operation section

(When the front panel is opened)

Heat exchanger

Air outlet

Fan

Emergency operation switch

Display section

Operation Indicator lamp

Front panel

Remote controller

Outdoor unit

MU-A09WA MU-A12WA MUY-A15/17NA

Air inlet (back and side)

Piping

Drainage hose

Air outlet

Remote control receiving section

Drain outlet

(This diagram shows an overall view.)

NAME OF EACH PART

PREPARATION BEFORE OPERATION

Remote controller

Signal transmitting section

Operation display section

ON/OFF (operate/

Open the front lid.

stop) button

(This diagram shows an overall view.)

Temperature buttons

NOTE

Use the remote controller provided with the unit only. Do not use other remote controller.

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.)

Breaker for the air conditioner

Turn the breaker on.

■

Vane control button

Operation select button

ECONO COOL button

POWERFUL button

RESET button

Fan speed control button

Off-timer button

On-timer button

TIME set buttons Forward button Backward button

CLOCK set button

HR.

ON/OFF

PREPARATION BEFORE OPERATION

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.

Insert the minus pole of the batteries first.

2 Press the RESET button.

Press using a thin stick.

• If the RESET button is not pressed, the remote controller may not operate correctly.

• Be sure to press the RESET button not too strongly.

3 Press the CLOCK set button.

Press using a thin stick.

4 Press the (Forward) and (Back-

ward) buttons (TIME SET buttons) to set the current time.

• Each time the button is pressed, the set time increases by 1 minute, and each time the ton is pressed, the set time decreases by 1 minute.

• Pressing those buttons longer increases/decreases the set time by 10 minutes.

5 Press the CLOCK set button again and close

the front lid.

but-

Handling of the remote controller

• The range that the signal can reach is about 20 ft. when the remote controller is pointed at the front of the indoor unit.

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

• Use the remote controller carefully. If it is dropped, thrown or it gets wet, the remote controller 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

How to install/remove the remote controller

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

Remote controller holder

Dry-cell batteries

■ Reference for replacing batteries Replace the batteries with new AAA alkaline batteries in the following cases:

button is pressed.

· 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 manner.

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.

1 Press the EMERGENCY OPERATION switch.

• When the EMERGENCY OPERATION switch is pressed, the unit will operate in test run for 30 minutes 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 75°F Fan speed Medium Horizontal vane Auto

• The operation mode is indicated by the Operation Indicator lamp on the indoor unit as following figure.

Operation Indicator lamp

EMERGENCY COOL

STOP

Lighted

Not lighted

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.

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