Page 1
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
Page 2
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
Page 3
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
Page 4
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)
Page 5
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
Page 6
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 2°F.
If you feel slightly cool:
■
Press the
TOO
COOL
button to raise the temperature.
One press raises the temperature by about 2°F.
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.
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
Room temperature when started Operation mode Target temperature (initial state)
About 77°F or higher COOL About 75°F
About 77°F or lower DRY —
NOTE:
COOL: When the room temperature is 4°F 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 4°F of the set temperature and then change the set temperature.
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) →
(FAN)
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 or DRY) 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.
Page 7
7
1
2
3
4
5
To select the COOL, DRY or 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) → (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, 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°F.
• Press the
TOO
COOL
button to raise the temperature. One press raises the temperature by about 1°F.
In COOL operation
• When the outside temperature is low, the fan of the outdoor unit turns on and off frequently or decreases the rotation
speed to maintain sufficient cooling capacity.
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.
If the air conditioner does not cool effectively…
If the fan speed is set to Low or AUTO, sometimes the air conditioner may not cool the air effectively. In this case, change the
fan speed to Med. or upper.
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 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 for more efficient air-conditioning
Use the
(AUTO) position usually.
Use position
(1) or (2) in the COOL or DRY mode
when adjusting to your requirements.
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. Moving the horizontal vanes manually can cause
trouble.
COOL
DRY
Auto air flow direction control operation
When the AUTO mode is selected with the
VANE
button, the position of the horizontal vane is automatically set to
correspond to the operation mode for effective operation.
(1) COOL, DRY: The air is blown out horizontally.
■
To change the AIR FLOW blowing direction horizontally, press the
WIDE VANE
button.
Each time the button is pressed, the angle of the VERTICAL VANE is changed in sequence:
→ → → → (SWING) → →
SWING OPERATION
Use the swing operation for the air flow to reach all corners of the room.
Horizontal AIR FLOW blowing range
NOTE:
Adjust the horizontal AIR FLOW direction using the remote controller. If the VERTICAL VANE is moved manually, it may cause trouble.
About 100°
COOL/DRY
Change the fan speed.
Fan speed: Low or AUTO
Fan speed: Med. or upper
Page 8
8
ECONO COOL OPERATION
Use this operation when you want to be comfortable in COOL mode even with energy saved.
Perform the following operations while the unit is operating 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 temperature of air conditioner.
Also SET TEMPERATURE is automatically set 4°F higher than in COOL mode.
To release the ECONO COOL operation:
■
Press the
ECONO COOL
button again.
○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○
• When the
VANE
button or the 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.
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 4°F higher, it is possible to perform cooling operation with keeping comfort. As a result, energy can be saved.
POWERFUL OPERATION
Use this operation when you want to cool your room within a short time period.
Perform the following operations while the unit is operating in the MANUAL COOL mode.
■
Press the button.
The air conditioner automatically adjusts the fan speed and the set temperature, and operates the POWERFUL mode. The POWERFUL mode is automatically released 15 minutes after operation starts, and the operation mode returns to the mode prior to POWERFUL operation.
POWERFUL mode
* Exclusive for POWERFUL mode
** When the position of the horizontal vane is set to
(AUTO) during cooling
operation, the air is blown downward.
To release the POWERFUL mode before it is released automatically:
■
Press the button again.
○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○
■
POWERFUL mode is also released in the following ways:
• By pressing the
ON/OFF
button
• By pressing the
FAN
button
• By pressing the
ECONO COOL
button
• By setting the ON timer
■
The
TOO
WARM
and
TOO
COOL
buttons are not available during the POWERFUL
operation.
■
The
VANE
button is available.
Position of
horizontal vane
Set position**
Fan speed
POWERFUL-high*
Page 9
9
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 TIME but-
tons (Forward) and (Backward).
Each time the button is pressed, the set time
increases by 10 minutes; each time the
button is
pressed, the set time decreases 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 TIME but-
tons (Forward) and (Backward).
Each time the button is pressed, the set time increases by 10 minutes; each time the
button is
pressed, the set time decreases by 10 minutes.
To release the OFF timer:
■
Press the
STOP
button.
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.
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.
To perform FAN operation, set the remote controller to
the highest temperature in the MANUAL COOL mode.
(Refer to page 7.)
2 Turn off the breaker.
CAUTION:
Turn off the breaker 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 10 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 ground is connected correctly.
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.
Page 10
10
CLEANING THE AIR FILTER (CATECHIN)
Do not open the front panel up past the level position.
The panel may come off in order to prevent it from being damaged.
Cleaning the air filter (about once every 2 weeks)
3 After washing with water/lukewarm water,
dry the air filter well in the shade.
• Do not expose the air filter to direct sunlight or heat
from a fire when drying it.
4 Install the air filter.
1 Remove the air filter.
CAUTION:
When the 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 air filter using a vacuum
cleaner or by washing the filter with water.
• If the dirt is noticeable, wash the filter with a solution of mild detergent diluted in lukewarm water.
• If hot water (120°F or more) is used, the filter may
be deformed.
Open the front
panel, then
remove/replace
the filter.
Air filter
Remove.
Install.
1
2
MAINTENANCE
Before starting maintenance
■
Turn off the breaker.
CAUTION:
When the unit is to be cleaned, switch it off and 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 lukewarm water.
• Do not use gasoline, benzine, thinner, polishing powder, or insecticide. The unit may be damaged.
Do not open the front panel up past the level position.
The panel may come off in order to prevent it from being damaged.
• The front panel may also come off if the upper part of the front panel is pulled down.
Do not exceed.
Movable
range
■
If the front panel comes off, attach it as explained below.
Keeping the front panel level with one hand, insert the hinges one by one with the other hand
into the notches at the left, right and center of the top of the indoor unit until they click into
place. (1) Then, close the front panel. (2)
Keep the front panel level and
insert the hinges into the notches.
• Do not step onto an unstable bench when maintaining the unit, etc. This may cause an injury, etc. if you fall
down.
CAUTION
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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.
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Air cleaning filter replacement
1 Remove the air filter.
2 Remove the air cleaning filter (blue bellows
type).
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 filter
About once every year
1 Install a new air cleaning filter.
2 Install the air filter and securely close the
front panel.
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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 1 year.
Optional parts Optional par ts are available from your local dealer.
Name of parts AIR CLEANING FILTER (Anti-Allergy Enzyme Filter)
Parts number MAC-2300FT
• Please purchase the optional parts (MAC-2300FT) as a set (2 pcs) for the first time use.
Air cleaning filter
CLEANING THE
AIR CLEANING FILTER
Cleaning the air cleaning filter (about once every 3 months)
1 Remove the air filter.
2 Remove the air cleaning filter (blue bellows
type).
3 Soak the filter together with its frame in luke-
warm water and wash it.
■ If the dirt is noticeable, use a solution of mild detergent diluted in lukewarm water.
■ If hot water (120°F or more) is used, the filter may
be deformed.
■ Do not use a scrubbing brush or sponge. This may
damage the surface of the filter.
■ Do not use a chlorine detergent.
4 After rinsing with water/lukewarm water,
shake off the excess water and dry the filter
well in the shade.
■ Do not expose the filter to direct sunlight or heat
from a fire when drying it.
Air filter
Air cleaning filter
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BEFORE CONTACTING THE SERVICE REPRESENTATIVE, CHECK THE FOLLOWING AGAIN
Question
The air conditioner cannot
be operated for about 3 minutes when restarted.
Cracking sound is heard.
The air from the indoor unit
smells strange.
The fan of the outdoor unit
does not rotate even
though the compressor is
running. Even if the fan
starts to rotate, it stops
soon.
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.
Mechanical sound is heard
from the indoor unit.
The swing operation of the
HORIZONTAL VANE is suspended for about 15 seconds, then restarted.
Answer (not a malfunction)
• This protects the air conditioner according to instructions from the microprocessor. Please wait.
• This sound is generated by the expansion/contraction of the front panel, etc. due to change in
temperature.
• The air conditioner may suck in an odor adhering to the wall, carpet, furniture, cloth, etc. and
blow it out with the air.
• When the outside temperature is low, the fan may
not operate to maintain sufficient cooling capacity.
• 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 defrosting.
• This sound is heard when the outside air is absorbed 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.
• This is the switching sound in turning on/off the
fan or the compressor.
• This is for the swing operation of the HORIZONTAL VANE to be performed normally.
WHEN YOU THINK THAT TROUBLE HAS OCCURRED
Question
The air conditioner cannot
be operated.
The room cannot be cooled
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 remote control signal.
When a power failure occurs.
Check points or Remedy
• Is the breaker turned on?
• Is the fuse blown?
• Is the ON timer set? (Page 9)
• Is the temperature setting correct? (Page 7)
• Are the filters clean? (Page 10, 11)
• Are there any obstacles blocking the air inlet or
outlet of the indoor or outdoor unit?
• Is a window or door open?
• Are the filters clean? (Page 10, 11)
• 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 Description of “AUTO RESTART FUNCTION” on page
6.)
Question
The air flow direction
changes during operation.
The direction of the horizontal vane cannot be adjusted with the remote controller.
Water leaks from the outdoor unit.
The swing operation of the
VERTICAL VANE is suspended for about 15 seconds, then restarted.
In a multi-unit system, the
indoor unit which is not operating 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.
• During COOL and DRY operations, pipe or pipe
connecting sections are cooled and this causes
water to condense.
• This is for the swing operation of the VERTICAL
VANE to be performed normally.
• A small amount of refrigerant continues to flow
into the indoor unit even though it is not operating.
• These models are equipped with an auto restart
function. When the main power is turned off without stopping the air conditioner with the remote
controller and is turned on again, the air conditioner will start operation automatically in the
same mode as the one set with the remote controller 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 or drops 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 affected device.
• When thunder is heard, stop operation and turn off the breaker. Otherwise,
the electrical parts may be damaged.
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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:
• 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.
• If the air conditioner is installed in a high humidity area or near a water source, a Ground Fault Interrupt (GFI) circuit
breaker should be installed to protect against 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.
• Use the correct power (voltage and frequency) indicated on the unit to operate the air conditioner and use only fuses or
breakers with specified capacity. Do not use pieces of wire instead of fuses.
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.
• The unit should be installed by licensed contractor according to local code requirements.
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.
3 ft.
or more
Radio
4 in. or
more
Wellventilated
dry place
20 in. or
more
TV
Cordless
phone or
Portable
phone
10 ft.
or more
3 ft.
or more
* The required space depends on the type of outdoor unit.
The installation location of the outdoor unit should be at least
10 ft. away from the antennas for TV sets, radios, etc. In areas
where the reception is weak, provide 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.
Page 14
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODAKU, TOKYO 100-8310, JAPAN
SG79Y551H01
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