Mitsubishi Electric Mr.SLIM MSY-JY09VF User manual

English
OPERATING INSTRUCTIONS For user
• To use this unit correctly and safely, be sure to read these operating
instructions before use.
SPLIT-TYPE AIR CONDITIONERS
INDOOR UNIT
MSY-JY18VF MSY-JY24VF
MSY-JY09VF MSY-JY13VF MSY-JY15VF

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● OPERATING INSTRUCTIONS ●
WARNING
(Risk of fi re)
This unit uses a fl ammable refrigerant.
If refrigerant leaks and comes in contact with fi re or heating part, it will create
harmful gas and there is risk of fi re.
Read the OPERATING INSTRUCTIONS carefully before operation.
Service personnel are required to carefully read the OPERATING INSTRUCTIONS and
INSTALLATION MANUAL before operation.
Further information is available in the OPERATING INSTRUCTIONS, INSTALLATION
MANUAL, and the like.
Meanings of symbols displayed on indoor unit and/or outdoor unit
• 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.
• After reading this manual, keep it together with the installation manual in a handy place for easy reference.
• Be sure to receive a guarantee card from your dealer and check that the purchased date and shop name, etc. are
entered correctly.
Marks and their meanings
WARNING : Incorrect handling could cause serious hazard, such as death, serious injury, etc. with a high
probability.
CAUTION : Incorrect handling could cause serious hazard depending on the conditions.
n SAFETY PRECAUTIONS 1
n NAME OF EACH PART 5
n PREPARATION BEFORE OPERATION 7
n SELECTING OPERATION MODES 8
n FAN SPEED AND AIRFLOW DIRECTION ADJUSTMENT 9
n FAST COOLING OPERATION 10
n SLEEP OPERATION 10
n TIMER OPERATION (ON/OFF TIMER) 11
n EMERGENCY OPERATION 11
n AUTO RESTART FUNCTION 11
n CLEANING 12
n WHEN YOU THINK THAT TROUBLE HAS OCCURRED 14
n ERROR CODE DISPLAY MODE 16
n WHEN THE AIR CONDITIONER IS NOT GOING TO BE USED FOR A LONG TIME 18
n INSTALLATION PLACE AND ELECTRICAL WORK 18
n SPECIFICATIONS 19
CONTENTS
SAFETY PRECAUTIONS

En-2
Meanings of symbols used in this manual
: Be sure not to do. : Danger of electric shock. Be careful.
: Be sure to follow the instruction. : Be sure to disconnect the power supply plug
from the power outlet.
: Never insert your fi nger or stick, etc. : Be sure to shut off the power.
: Never step onto the indoor/outdoor unit and do not
put anything on them.
: Risk of fi re
WARNING
Do not connect the power cord to an intermediate point, use an extension cord, or connect
multiple devices to a single AC outlet.
• This may cause overheating, fi re, or electric shock.
Make sure the power plug is free of dirt and insert it securely into the outlet.
• A dirty plug may cause fi re or electric shock.
Do not bundle, pull, damage, or modify the power cord, and do not apply heat or place heavy
objects on it.
• This may cause fi re or electric shock.
Do not turn the breaker OFF/ON or disconnect/connect the power plug during operation.
• This may create sparks, which can cause fi re.
• After the indoor unit is switched OFF with the remote controller, make sure to turn the breaker OFF
or disconnect the power plug.
Do not expose your body directly to cool air for a prolonged length of time.
• This could be detrimental to your health.
The unit should not be installed, relocated, disassembled, altered, or repaired by the user.
• An improperly handled air conditioner may cause fi re, electric shock, injury, or water leakage, 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 installing, relocating, or servicing the unit, make sure that no substance other than the
specifi ed refrigerant (R32) enters the refrigerant circuit.
• Any presence of foreign substance such as air can cause abnormal pressure rise and may result
in explosion or injury.
• The use of any refrigerant other than that specifi ed for the system will cause mechanical failure,
system malfunction, or unit breakdown. In the worst case, this could lead to a serious impediment
to securing product safety.
This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the appliance by a person responsible for
their safety.
Children should be supervised to ensure that they do not play with the appliance.
Do not insert your fi nger, a stick, or other objects into the air inlet or outlet.
• This may cause injury, since the fan inside rotates at high speeds during operation.
In case of an abnormal condition (such as a burning smell), stop the air conditioner and discon-
nect the power plug or turn the breaker OFF.
• A continued operation in the abnormal state may cause a malfunction, fi re, or electric shock. In this
case, consult your dealer.
When the air conditioner does not cool or heat, there is a possibility of refrigerant leakage. If
any refrigerant leakage is found, stop operations and ventilate the room well and consult your
dealer immediately. If a repair involves recharging the unit with refrigerant, ask the service
technician for details.
• The refrigerant used in the air conditioner is not harmful. Normally, it does not leak. However, if
refrigerant leaks and comes in contact with fi re or heating part of such a fan heater, kerosene heater,
or cooking stove, it will create harmful gas and there is risk of fi re.
SAFETY PRECAUTIONS

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● OPERATING INSTRUCTIONS ●
WARNING
The user should never attempt to wash the inside of the indoor unit. Should the inside of the
unit require cleaning, contact your dealer.
• Unsuitable detergent may cause damage to plastic material inside the unit, which may result in
water leakage. Should detergent come in contact with electrical parts or the motor, it will result in
a malfunction, smoke, or fi re.
• The appliance shall be stored in a room without continuously operating ignition sources (for example:
open fl ames, an operating gas appliance or an operating electric heater).
• Be aware that refrigerants may not contain an odour.
• Do not use means to accelerate the defrosting process or to clean the appliance, other than those
recommended by the manufacturer.
• Do not pierce or burn.
The indoor unit must be installed in rooms which exceed the fl oor space specifi ed. Please
consult your dealer.
CAUTION
Do not touch the air inlet or the aluminum fi ns of the indoor/outdoor unit.
• This may cause injury.
Do not use insecticides or fl ammable sprays on the unit.
• This may cause a fi re or deformation of the unit.
Do not expose pets or houseplants to direct airfl ow.
• This may cause injury to the pets or plants.
Do not place other electric appliances or furniture under the indoor/outdoor unit.
• Water may drip down from the unit, which may cause damage or malfunction.
Do not leave the unit on a damaged installation stand.
• The unit may fall and cause injury.
Do not step on an unstable bench to operate or clean the unit.
• This may cause injury if you fall down.
Do not pull the power cord.
• This may cause a portion of the core wire to break, which may cause overheating or fi re.
Do not charge or disassemble the batteries, and do not throw them into a fi re.
• This may cause the batteries to leak, or cause a fi re or explosion.
Do not operate the unit for more than 4 hours at high humidity (80% RH or more) and/or with
windows or outside door left open.
• This may cause the water condensation in the air conditioner, which may drip down, wetting or
damaging the furniture.
• The water condensation in the air conditioner may contribute to growth of fungi, such as mold.
Do not use the unit for special purposes, such as storing food, raising animals, growing plants,
or preserving precision devices or art objects.
• This may cause deterioration of quality, or harm to animals and plants.
Do not expose combustion appliances to direct airfl ow.
• This may cause incomplete combustion.
Never put batteries in your mouth for any reason to avoid accidental ingestion.
• Battery ingestion may cause choking and/or poisoning.
Before cleaning the unit, switch it OFF and disconnect the power plug or turn the breaker OFF.
• This may cause injury, since the fan inside rotates at high speeds during operation.
When the unit will be unused for a long time, disconnect the power plug or turn the breaker OFF.
• The unit may accumulate dirt, which may cause overheating or fi re.
Replace all batteries of the remote controller with new ones of the same type.
• Using an old battery together with a new one may cause overheating, leakage, or explosion.
If the battery fl uid comes in contact with your skin or clothes, wash them thoroughly with
clean water.
• If the battery fl uid comes in contact with your eyes, wash them thoroughly with clean water and
immediately seek medical attention.
SAFETY PRECAUTIONS

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CAUTION
Ensure that the area is well-ventilated when the unit is operated together with a combustion
appliance.
• Inadequate ventilation may cause oxygen starvation.
Turn the breaker OFF when you hear thunder and there is a possibility of a lightning strike.
• The unit may be damaged if lightning strikes.
After the air conditioner is used for several seasons, perform inspection and maintenance in
addition to normal cleaning.
• Dirt or dust in the unit may create an unpleasant odor, contribute to growth of fungi, such as mold,
or clog the drain passage, and cause water to leak from the indoor unit. Consult your dealer for
inspection and maintenance, which require specialized knowledge and skills.
Do not operate switches with wet hands.
• This may cause electric shock.
Do not clean the air conditioner with water or place an object that contains water, such as a
fl ower vase, on it.
• This may cause fi re or electric shock.
Do not step on or place any object on the outdoor unit.
• This may cause injury if you or the object falls down.
WARNING
Consult your dealer for installing the air conditioner.
• It should not be installed by the user since installation requires specialized knowledge and skills.
An improperly installed air conditioner may cause water leakage, fi re, or electric shock.
Provide a dedicated power supply for the air conditioner.
• A non-dedicated power supply may cause overheating or fi re.
Do not install the unit where fl ammable gas could leak.
• If gas leaks and accumulates around the outdoor unit, it may cause an explosion.
Earth the unit correctly.
• Do not connect the earth wire to a gas pipe, water pipe, lightning rod, or a telephone earth wire.
Improper earthing may cause electric shock.
CAUTION
Install an earth leakage breaker depending on the installation location of the air conditioner
(such as highly humid areas).
• If an earth leakage breaker is not installed, it may cause electric shock.
Ensure that the drain water is properly drained.
• If the drain passage is improper, water may drip down from the indoor/outdoor unit, wetting and
damaging the furniture.
IMPORTANT
Dirty fi lters cause condensation in the air conditioner which will contribute to the growth of fungi such as
mold. It is therefore recommended to clean air fi lters every 2 weeks.
In case of an abnormal condition
Immediately stop operating the air conditioner and consult your dealer.
For installation
SAFETY PRECAUTIONS

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● OPERATING INSTRUCTIONS ●
NAME OF EACH PART
Remote control receiving section
Air inlet
Air inlet
Front panel
Air outlet
Heat exchanger
Emergency operation switch Page 11
Horizontal vane Operation indicator lamp
Indoor unit
<JY09/13/15>
Air cleaning fi lter
(Microparticle catching fi lter)
(Electrostatic anti-allergy enzyme
fi lter, option)
Air fi lter
(V air fi lter)
Operation indicator lamp
Horizontal vane
Air outlet
Heat exchanger
Front panel
Emergency operation switch Page 11
Remote control receiving section
<JY18/24>
Air cleaning fi lter
(Microparticle catching fi lter)
(Electrostatic anti-allergy enzyme
fi lter, option)
Air fi lter
(V air fi lter)
Outdoor unit
Outdoor units may be diff erent in appearance.
Air inlet (back and side)
Refrigerant piping
Drainage hose
Air outlet
Drain outlet

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NAME OF EACH PART
Remote controller Signal transmitting section
Distance of signal : About 6 m*
Beep(s) is (are) heard from the
indoor unit when the signal is
received.
* Refer to page 17 for ERROR
CODE DISPLAY MODE.
FAST COOLING button
Page 10
Operation display section
OFF/ON (stop/operate) button
Page 8
Temperature buttons
Page 8,16
Operation select button
Page 8
SLEEP button
Page 10
UNIT button
Page 7
FAN speed control button
Page 9
VANE control button
Page 9
TIME set button
Page 11
RESET button
Page 7
CHECK button
Page 16
TIMER mode select button
Page 11
Only use the remote controller provided with the unit.
Do not use other remote controllers.
If two or more indoor units are installed in proximity to one another, an indoor unit that
is not intended to be operated may respond to the remote controller.
Remote controller
hook
• Install the remote controller
hook in a place where the
signal can be received by
the indoor unit.

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● OPERATING INSTRUCTIONS ●
Note:
• Make sure the polarity of the batteries is correct.
• Do not use manganese batteries and leaking batter-
ies. The remote controller could malfunction.
• Do not use rechargeable batteries.
• Replace all batteries with new ones of the same type.
• Batteries can be used for approximately 1 year. How-
ever, batteries with expired shelf lives last shorter.
• Press RESET gently using a thin instrument.
If the RESET is not pressed, the remote controller
may not operate correctly.
PREPARATION BEFORE OPERATION
Before operation: Insert the power supply plug into the
power outlet and/or turn the breaker on.
Installing the remote controller
batteries
4. Press RESET.
2. Insert the nega-
tive pole of AAA
alkaline batteries
fi rst.
1. Remove the back lid.
3. Install the back lid.
Note:
How to set remote controller exclusively for a par-
ticular indoor unit
A maximum of 4 indoor units with wire-
less remote controllers can be set.
To operate the indoor unit individually
with each remote controller, assign a
number to each remote controller ac-
cording to the number of the indoor unit. Please set ac-
cording to the following procedure:
(1) Turn the breaker OFF for the unit.
(2) With the remote controller powered OFF, hold down
UNIT on the remote controller for 2
seconds to enter the pairing mode.
Setting number is displayed in the
remote controller.
(3) Press UNIT again and assign a num-
ber to each remote controller.
Each press of UNIT advances the number in the
following order: 1→2→3→4.
(4) Press to complete the pairing setting.
After you turn the breaker ON, the remote controller that
fi rst sends a signal to an indoor unit will be regarded as
the remote controller for the indoor unit.
Once they are set, the indoor unit will only receive the
signal from the assigned remote controller afterwards.
The setting of indoor unit will be cancelled, if the breaker
is turned OFF or the power supply is shut down.

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Note:
Operation indicator lamp
The operation indicator lamp shows the operation state
of the unit.
Indication Operation state Room
temperature
JY09/13/15 JY18/24
The unit is oper-
ating to reach the
set temperature
About 2°C or
more away from
set temperature
The room
temperature is
approaching the
set temperature
About 1 to 2°C
from set
temperature
Lit Not lit
I FEEL mode
The unit selects the operation mode according to
the room temperature when I FEEL is selected.
When the room temperature is higher than 25°C,
COOL is selected (set temperature: 24°C). When
the room temperature is lower than 25°C, DRY is
selected. However, when operation is stopped and
then started within 2 hours, the mode which has
been selected previously is operated.
Note:
During COOL operation, the set temperature may
not be changed when the room temperature is
more than 2°C higher than the set temperature. In
this case, please wait until the room temperature
drops to within 2°C of the set temperature.
COOL mode
Enjoy cool air at your desired temperature.
DRY mode
Dehumidify your room. The room may be cooled
slightly.
Temperature cannot be set during DRY mode.
FAN mode
Circulate the air in your room.
SELECTING OPERATION MODES
1Press to start the operation.
2Press to select operation
mode. Each press changes mode in
the following order:
3
Press or to set the temperature.
Each press raises or lowers the tem-
perature by 1°C.
Press to stop the operation.
• The same setting is selected the next time by
simply pressing .
(I FEEL) (COOL) (DRY) (FAN)

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● OPERATING INSTRUCTIONS ●
Left-right Airflow direction
n To change the horizontal airfl ow direction.
Move the vertical vanes from side to side by pinching
the tabs indicated by arrows before starting operation.
F AN SPEED AND AIRFLOW DIRECTION ADJUSTMENT
Fan speed
1Pr
ess to select fan speed. Each
press changes fan speed in the follow-
ing order:
• Two short beeps are heard from the indoor unit
when set to AUTO.
• Use higher fan speed to cool the room more
powerfully. It is recommended to lower the fan
speed once the room is cool.
• Use lower fan speed for quiet operation.
• Use lower fan speed to further lower the outlet
temperature and humidity.
(AUTO) (Quiet) (Low) (Med.) (High) (Super High)
1Press to select airfl ow direc-
tion. Each press changes airfl ow
direction in the following order:
(AUTO) ........The vane is set to the most effi cient
airfl ow direction. :horizontal position.
(Manual) ........For effi cient air conditioning, select the
upper position for COOL/DRY, and the
lower position for FAN. If the lower
position is selected during COOL/
DRY, the vane automatically moves
to the upward position after 0.5 to 1
hour to prevent any condensation from
dripping.
(Swing) .........The vane moves up and down intermit-
tently.
• Two short beeps are heard from the indoor unit when
set to AUTO.
Up-down Airflow direction
(AUTO) (1) 2) (3) (4) (5) ( SWING )

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F AST COOLING OPERATION SLEEP OPERATION
1
Press during COOL
mode page 8 to start FAST COOL-
ING operation.
Fan speed : Exclusive speed for FAST
COOLING mode
Horizontal vane : The vane follows as your
selection during Manual/
Swing.
Exclusive position during
AUTO operation.
• Temperature cannot be set during FAST
COOLING operation.
Press again to cancel FAST
COOLING operation.
• FAST COOLING operation is also cancelled
automatically in 15 minutes, or when the
MODE, OFF/ON or FAN button is pressed.
1Press during COOL
mode Page 8 to start SLEEP opera-
tion.
• Set temperature will change over time.
• Set temperature will be controlled slightly
lower for about 2 hours.
It will help you fall asleep more easily.
• Air direction can be changed as you like.
• SLEEP operation cannot be set when ON
timer is on stand-by.
SLEEP ON
Set
temperature
before
setting the
SLEEP
operation.
About 2 hours
During the SLEEP
operation.
Set
temperature
before
setting the
SLEEP
operation.
Press again to cancel SLEEP
operation.
• SLEEP operation is also cancelled when the
MODE, FAST, OFF/ON or ON TIMER button is
pressed.

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● OPERATING INSTRUCTIONS ●
When the remote controller
cannot be used...
Emergency operation can be activated by pressing the
emergency operation switch (E.O. SW) on the indoor unit.
Each time the E.O. SW is pressed,
the operation changes in the following
order:
Note:
The fi rst 30 minutes of operation is test run. Tempera-
ture control does not work, and fan speed is set to High.
Operation indicator lamp
<JY09/13/15> <JY18/24>
Emergency COOL
Stop
Set temperature : 24°C
Fan speed : Medium
Horizontal vane : Auto
If a power failure occurs or the main power is turned off
during operation, “Auto restart function” automatically
starts operation in the same mode as the one set with
the remote controller just before the shutoff of the main
power. When timer is set, timer setting is cancelled and
the unit starts operation when power is resumed.
If you do not want to use this function, please consult
the service representative because the setting of the
unit needs to be changed.
TIMER OPERATION
(ON/OFF TIMER) E
MERGENCY OPERATION
A UTO RESTART FUNCTION
1Press during operation to set
the timer.
Each press changes timer mode in
the following order:
2Press to set the time of timer.
Press increases the set time by 1 hour.
Press until “TIMER RELEASE”
is selected to release timer.
Note:
• ON and OFF timers can not be used in combination.
• If power failure occurs while ON/OFF timer is set,
see page 11 “Auto restart function”.
(OFF TIMER) (ON TIMER)
TIMER
RELEASE

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CLEANING
Instructions:
• Switch off the power supply or turn off the breaker before cleaning.
• Be careful not to touch the metal parts with your hands.
• Do not use benzine, thinner, polishing powder, or insecticide.
• Use only diluted mild detergents.
• Do not expose parts to direct sunlight, heat, or fi re to dry.
• Do not use water hotter than 50°C.
• Do not use a scrubbing brush, a hard sponge, or the like.
• Do not apply excessive force on the fan as it may cause cracks or breakage.
1. Lift the front panel until a “click” is heard.
2. Hold the hinges and pull to remove as shown in the illustration above.
• Wipe with a soft dry cloth or rinse it with water.
• Do not soak it in water for more than two hours.
• Dry it well in shade.
3. Install the front panel by following the removal procedure in reverse. Close the
front panel securely and press the positions indicated by the arrows.
Front panel
Hole
Hinge
<JY09/13/15> <JY18/24>
Air cleaning fi lter Page 13
Air fi lter Page 13
<JY09/13/15>
<JY18/24>

Air cleaning fi lter
(Electrostatic anti-allergy enzyme fi lter, option)
Back side of air fi lter
Every 3 months:
• Remove dirt by a vacuum cleaner.
• Put it back to its original position, and install all tabs of the air cleaning fi lter.
When dirt cannot be removed by vacuum cleaning:
• Soak the fi lter and its frame in lukewarm water before rinsing it.
• After washing, dry it well in shade. Install all tabs of the air fi lter.
Every year:
• Replace it with a new air cleaning fi lter for best performance.
• Parts Number MAC-2320FT (with frame)
• Parts Number MAC-2321FT (no frame)
Air cleaning fi lter
(Microparticle catching fi lter)
Removes the microparticles from the air by means of static electricity.
Back side of air fi lter
Every 3 months:
• Remove dirt by a vacuum cleaner.
• Do not wash it with water. Replace it with a new air cleaning fi lter
when tobacco tar or oil stains adhere to it.
• Put it back to its original position, and install all tabs of the air clean-
ing fi lter.
Every 3 year:
• Replace it with a new air cleaning fi lter for best performance.
• Parts Number MAC-EMF515FT-E (with frame)
• Parts Number MAC-EMF525FT-E (no frame)
Important
• Clean the fi lters regularly for best performance and to reduce power consumption.
• Dirty fi lters cause condensation in the air conditioner which will contribute to the growth of
fungi such as mold. It is therefore recommended to clean air fi lters every 2 weeks.
En-13
● OPERATING INSTRUCTIONS ●
CLEANING
Air fi lter (V air fi lter)
• Clean every 2 weeks
• Remove dirt by a vacuum cleaner, or rinse with water.
• After washing with water, dry it well in shade.
• V air fi lter has a virus-suppressing coating not only to improve air quality but also to eliminate bacteria and viruses.
Pull to remove from the air fi lter
Pull to remove from the air fi lter

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Even if these items are checked, when the unit does not recover from the trouble, stop using the air condi-
tioner and consult your dealer.
Symptom Explanation & Check points
Indoor Unit
The unit cannot be operated. • Is the breaker turned on?
• Is the power supply plug connected?
• Is the ON timer set? Page 11
The horizontal vane does not move. • Are the horizontal vane and the vertical vane installed correctly?
• Is the fan guard deformed?
The unit cannot be operated for about 3
minutes when restarted.
• This protects the unit according to instructions from the microprocessor.
Please wait.
Mist is discharged from the air outlet of
the indoor unit.
• The cool air from the unit rapidly cools moisture in the air inside the
room, and it turns into mist.
The swing operation of the HORIZONTAL
VANE is suspended for a while, then
restarted.
• This is for the swing operation of the HORIZONTAL VANE to be per-
formed normally.
The air fl ow direction changes during
operation.
The direction of the horizontal vane can-
not be adjusted with the remote controller.
• When the unit is operated in COOL or DRY mode, if the operation
continues with air blowing down for 0.5 to 1 hour, the direction of the
air fl ow is automatically set to upward position to prevent water from
condensing and dripping.
The unit starts operation by itself when
the main power is turned on, though it
isn’t operated with the remote controller.
• These models are equipped with an auto restart function. When
the main power is turned off without stopping the unit with the
remote controller and is turned on again, the unit starts op-
eration automatically in the same mode as the one set with
the remote controller just before the shutoff of the main power.
Refer to “Auto restart function”. Page 11
The indoor unit discolors over time. • Although plastic turns yellow due to the infl uence of some factors such
as ultraviolet light and temperature, this has no eff ect on the product
functions.
Outdoor Unit
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.
• When the outside temperature is low during cooling operation, the fan
operates intermittently to maintain suffi cient cooling capacity.
Water leaks from the outdoor unit. • During COOL and DRY operations, pipe or pipe connecting sections
are cooled and this causes water to condense.
Remote controller
The display on the remote controller does
not appear or it is dim. The indoor unit
does not respond to the remote control
signal.
• Are the batteries exhausted? Page 7
• Is the polarity (+, -) of the batteries correct? Page 7
• Are any buttons on the remote controller of other electric appliances
being pressed?
W HEN YOU THINK THAT TROUBLE HAS OCCURRED

En-15
● OPERATING INSTRUCTIONS ●
Symptom Explanation & Check points
Does not cool
The room cannot be cooled suffi ciently. • Is the temperature setting appropriate? Page 8
• Is the fan setting appropriate? Please change fan speed to High or
Super High. Page 9
• Are the fi lters clean? Page 12
• Is the fan or heat exchanger of the indoor unit clean?
• Are there any obstacles blocking the air inlet or outlet of the indoor or
outdoor unit?
• Is a window or door open?
• When a ventilation fan or a gas cooker is used in a room, the cooling
load increases, resulting in an insuffi cient cooling eff ect.
• When the outside temperature is high, the cooling eff ect may not be
suffi cient.
• It may take a certain time to reach the setting temperature or may not
reach that depending on the size of the room, the ambient temperature,
and the like.
Airfl ow
The air from the indoor unit smells
strange.
• Are the fi lters clean? Page 12
• Is the fan or heat exchanger of the indoor unit clean?
• The unit may suck in an odor adhering to the wall, carpet, furniture,
cloth, etc. and blow it out with the air.
Sound
Cracking sound is heard. • This sound is generated by the expansion/contraction of the front panel,
etc. due to change in temperature.
“Burbling” sound is heard. • This sound is heard when the outside air is absorbed from the drain
hose by turning on the range hood or the ventilation fan, making water
fl owing in the drain hose to spout out.
This sound is also heard when the outside air blows into the drain hose
in case the outside wind is strong.
Mechanical sound is heard from the
indoor unit.
• This is the switching sound in turning on/off the fan or the compressor.
The sound of water fl owing is heard. • This is the sound of refrigerant or condensed water fl owing in the unit.
Hissing sound is sometimes heard. • This is the sound when the fl ow of refrigerant inside the unit is switched.
In the following cases, stop using the air conditioner and consult your dealer.
• When water leaks or drips from the indoor unit.
• When the left/upper operation indicator lamp blinks. Page 16
Except for when the lamp of a multi unit blinks while the unit is on standby.
• When the breaker trips frequently.
• The remote control signal is not received in a room where an electronic ON/OFF type fl uorescent lamp (inverter-type
fl uorescent lamp, etc.) is used.
• Operation of the air conditioner interferes with radio or TV reception. An amplifi er may be required for the aff ected
device.
• When an abnormal sound is heard.
• When any refrigerant leakage is found.
W HEN YOU THINK THAT TROUBLE HAS OCCURRED

En-16
Error code can be checked on the display of remote controller while
the left/upper operation indicator lamp on the indoor unit is blinking.
Follow the procedure below to check the error code.
E RROR CODE DISPLAY MODE
An example of error code (00)
1 Error code display
• The remote controller is powered OFF.
• Get close to the front of the indoor unit, point the remote
controller at the receiving section of the indoor unit, and
keep pressing CHECK with a fine-tipped object.
• “00” will be shown in the display.
• Keep pointing the remote controller at the receiving
section of the indoor unit until the indoor unit beeps.
• If the indoor unit does not beep, get closer to the in-
door unit and keep pressing CHECK again.
• If the indoor unit still does not beep, turn off the power
of appliance such as fluorescent lamp and TV which
might cause noise, then try again. (If the battery re-
placement indicator lights up, replace the batteries
with new ones.)
• When the display of the remote controller shows “00”
and the indoor unit beeps 2 times, it means the unit
has no error.
•
When the display of the remote controller shows “00” and
the indoor unit beeps 1 time, it means the unit has an er-
ror. Follow the procedure below and diagnose the error.
2 Error code check
Press or to change an error code.
Each press changes the error code
shown on the remote controller in ascending
order (A to Z) as below.
00 E6 · · · · · · UP
Each press changes the error code in
descending order (Z to A).
Check the error codes 1 by 1 to send the signal.
The indoor unit beeps 2 times
: The unit has the error corresponding to the
error code. Refer to the error code table and
confirm the abnormal point.
The indoor unit beeps 1 time
: The unit has no error. Repeat checking.
The indoor unit does not beep
: The diagnosis gets a fail. Try again.
• When the unit has an error, the air conditioner
needs to be inspected and repaired. Stop us-
ing the air conditioner, turn off the breaker and
contact your dealer.
Note:
Pressing other buttons than or cancels the
error code display mode of the remote controller.
If the remote controller is operated while the operation
indicator lamp is not blinking, the accurate error code
might not be shown.

En-17
● OPERATING INSTRUCTIONS ●
Error code of remote controller
Object Code Abnormal point
00 None (Normal)
Indoor unit E6 Serial signal
E7
Fb Indoor control system
P1 Room temperature thermistor
P2 Indoor coil thermistor
P9
Pb Indoor fan motor
Outdoor unit E8
Indoor/outdoor communication, receiving errorE9
EC
FC Nonvolatile memory data
Fd Diff erent voltage
P8 4-way valve/Pipe temperature
PL Outdoor refrigerant system
U3 Discharge temperature thermistor
U4
Defrost thermistor
Fin temperature thermistor
P.C. board temperature thermistor
Ambient temperature thermistor
Outdoor heat exchanger temperature thermistor
UE Stop valve (Closed valve)
UP Outdoor power system
E RROR CODE DISPLAY MODE

En-18
1Operate by COOL mode with the
highest temperature set or FAN
mode for 3 to 4 hours. Page 8
• This dries the inside of the unit.
• Moisture in the air conditioner contributes to
growth of fungi, such as mold.
2Press to stop the operation.
3Turn off the breaker and/or discon-
nect the power supply plug.
4Remove all batteries from the remote
controller.
When using the air conditioner
again:
1Clean the air fi lter. Page 12
2Check that the air inlet and outlet of
the indoor and outdoor units are not
blocked.
3Check that the earth is connected
correctly.
4Refer to the “PREPARATION BE-
FORE OPERATION”, and follow the
instructions. Page 7
Installation place
Avoid installing the air conditioner in the following
places.
• Where there is much machine oil.
• Salty places such as the seaside.
• Where sulfi de gas is generated such as hot spring,
sewage, waste water.
• Where oil is splashed or where the area is fi lled with
oily smoke (such as cooking areas and factories, in
which the properties of plastic could be changed and
damaged).
• Where there is high-frequency or wireless equipment.
• Where the air from the outdoor unit air outlet is blocked.
• Where the operation sound or air from the outdoor unit
bothers the house next door.
• The mounting height of indoor unit 1.8 m to 2.3 m is
recommended. If it is impossible, please consult your
dealer.
• The indoor unit must be installed in rooms which
exceed the fl oor space specifi ed. Please consult your
dealer.
• Do not operate the air conditioner during interior
construction and fi nishing work, or while waxing the
fl oor. Before operating the air conditioner, ventilate the
room well after such work is performed. Otherwise, it
may cause volatile elements to adhere inside the air
conditioner, resulting in water leakage or scattering of
dew.
Electrical work
• Provide an exclusive circuit for the power supply of the
air conditioner.
• Be sure to observe the breaker capacity.
If you have any questions, consult your dealer.
W HEN THE AIR CONDITIONER IS NOT
GOING TO BE USED FOR A LONG TIME
I NSTALLATION PLACE
AND ELECTRICAL WORK
To prevent the eff ects
of a fl uorescent lamp,
keep as far apart as
possible.
wall, etc.
Keep a space
to prevent
the picture
distortion or
the noise.
1 m or
more
Radio
100 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, ra-
dios, etc. In areas where the reception is weak, pro-
vide greater space between the outdoor unit and the
antenna of the aff ected device if operation of the air
conditioner interferes with radio or TV reception.
For the optimum effi -
ciency and to extend
the life time of using,
the outdoor unit
should be installed
in a well-ventilated
dry place.
100/200/500 mm
or more
(JY09, 13, 15/
JY18/JY24)
Inverter-type
fl uorescent lamp

En-19
● OPERATING INSTRUCTIONS ●
Model MSY-JY09VF MSY-JY13VF MSY-JY15VF
Dimensions
H × W × D (mm)
Indoor 280 × 838 × 228 280 × 838 × 228 280 × 838 × 228
Outdoor 454 × 660 × 235 454 × 660 × 235 538 × 699 × 249
Weight (kg) Indoor 9.1 9.1 9.1
Outdoor 18.8 19.9 24.5
Model MSY-JY18VF MSY-JY24VF
Dimensions
H × W × D (mm)
Indoor 305 × 923 × 250 305 × 923 × 250
Outdoor 545 × 780 × 294 840 × 880 × 330
Weight (kg) Indoor 12.1 12.1
Outdoor 27.5 45.5
Indoor Outdoor
Upper limit 32°C DB
23°C WB
46°C DB
—
Lower limit 21°C DB
15°C WB
21°C DB
—
Guaranteed operating range
DB: Dry Bulb
WB: Wet Bulb
SPECIFICATIONS