Mitsubishi MSY-A24NA Operation Manual
OPERATING INSTRUCTIONS
For customers
Thank you very much for purchasing this Mitsubishi room air conditioner .
• To use this unit correctly and safely, be sure to read this operating instructions before use. Keep
this manual carefully for later reference.
• Be sure to receive a guarantee card from your dealer and check
that the purchased data and
shop name, etc. are entered correctly.
• This air conditioner should not be installed by the customer. (Safety and performance functions
cannot be assured.)
SPLIT -TYPE AIR CONDITIONERS
MSY-A24NA
English
CONTENTS
SAFETY PRECAUTIONS ................................................................................................ 2
NAME OF EACH PART
...................................................................................................
3
PREPARATION BEFORE OPERATION ........................................................................ 4
I FEEL... AUTO OPERATION ......................................................................................... 6
MANUAL OPERATION (COOL, DRY, FAN) ............................................................... 7
AIR FLOW VELOCITY AND DIRECTION ADJUSTMENT ......................................... 7
POWERFUL OPERATION ............................................................................................. 8
ECONO COOL OPERATION ......................................................................................... 8
TIMER OPERATION (ON/OFF TIMER) ....................................................................... 9
WHEN THE AIR CONDITIONER IS NOT GOING TO BE USED
FOR A LONG TIME .......................................................................................................... 9
MAINTENANCE ............................................................................................................... 10
CLEANING THE AIR FILTER (CATECHIN) .................................................................. 10
REPLACEMENT OF THE AIR CLEANING FILTER ..................................................... 11
CLEANING THE AIR CLEANING FILTER ...............................................................
...... 11
BEFORE CONTACTING THE SERVICE REPRESENTATIVE,
CHECK THE FOLLOWING AGAIN ............................................................................... 12
WHEN YOU THINK THAT TROUBLE HAS OCCURRED .......................................... 12
INSTALLATION, RELOCATION AND INSPECTION .................................................. 13
2
FRONT PANEL
ENCLOSURE
ENCLOSURE
AIR OUTLET
•
This air conditioner is NOT intended for use by children or infirm persons without supervisions.
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
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.
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.
WARNING
CAUTION
3
SAFETY PRECAUTIONS NAME OF EACH PART
Indoor unit
Outdoor unit
Air cleaning filter
(Anti-Allergy Enzyme
Filter (Blue bellows
type))
Vertical vane
Operation section
(When the front panel is opened)
Front panel
Air inlet
Remote control
receiving section
Display section
Emergency operation switch
Horizontal vane
Remote controller
Remote control
receiving section
Operation
Indicator lamp
Air inlet (back and side)
Piping
Drainage hose
Air outlet
Drain outlet
Air filter (Catechin)
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.
CAUTION
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
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 incorrectly, 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.
WARNING
4
(This diagram shows an overall view.)
NAME OF EACH PART
Remote controller
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.)
Breaker for the air conditioner
■
Turn the breaker on.
Fan speed control button
Signal transmitting section
Operation display section
Operation select button
ECONO COOL button
On-timer button
CLOCK set button
TIME set buttons
Forward button
Backward button
Temperature buttons
Off-timer button
RESET button
(This diagram shows an overall view.)
ON/OFF (operate/
stop) button
Open the front lid.
POWERFUL button
NOTE
Use the remote controller
provided with the unit only.
Do not use other remote
controller.
WIDE VANE button
(Vertical vane button)
VANE button
(Horizontal vane button)
5
HR.
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 controller may not operate correctly.
3 Press the CLOCK set button.
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
but-
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.
Press using a
thin stick.
Press using a
thin stick.
Insert the minus pole
of the batteries first.
Remote controller holder
1 Press the EMERGENCY OPERATION switch.
• Each time the EMERGENCY OPERATION switch is
pressed, the unit will operate in order of EMERGENCY COOL 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 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
Vertical vane Front
• The operation mode is indicated by the Operation
Indicator lamp on the indoor unit as following figure.
Operation Indicator lamp
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.
EMERGENCY COOL STOP
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.
• Since the display on the remote controller is made of
liquid crystal (glass), it may not light up if it is damaged
from falling.
• Refer to page 12 when the indoor unit does not respond
to the remote control signal.
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 manner.
PREPARATION BEFORE OPERATION
2 To stop the emergency operation, press the
EMERGENCY OPERATION switch twice (in
case of EMERGENCY COOL MODE).
Operation Indicator
Operation Indicator
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