Mitsubishi Electric Mr.Slim MSY-GA24NA User manual

,_ MITSUBISHI
ELECTRIC I lr.$LIIl
SPLIT-TYPE AIR CONDITIONERS
INDOOR UNITI
MSY-GA24NA
OPERATING INSTRUCTIONS
,=this unit correctly and safely, be sure to read these operating n-

• OPERATING INSTRUCTIONS •
• SAFETY PRECAUTIONS
• NAME OF EACH PART
• PREPARATION BEFORE OPERATION
• SELECTING OPERATION MODES
• FAN SPEED AND AIRFLOW DIRECTION ADJUSTMENT
• ECONO COOL OPERATION
• POWERFUL OPERATION
• TIMER OPERATION (ON/OFF TIMER)
• CLEANING
• WHEN YOU THINK THAT TROUBLE HAS OCCURRED
• WHEN THE AIR CONDITIONER IS NOT GOING TO BE USED FORALONG TIME
• INSTALLATION PLACE AND ELECTRICAL WORK
• SPECIFICATIONS
1
3
4
5
6
7
7
7
8
9
10
10
10
• 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
Z_ WARNING :
•'_ CAUTION '
Incorrect handling could cause serious hazard, such as
death, serious injury, etc. with a high probability.
Incorrect handling could cause serious hazard depending
on the conditions.
WARNING
QDo 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, fire, or electric shock.
Make sure the power plug is free of dirt and insert it se-
curely into the outlet.
• A dirty plug may cause fire or electric shock.
Do not bundle, pull, or modify the power cord, and do not
apply heat or place heavy objects on it.
• This may cause fire 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 fire.
• After the indoor unit is switched OFF with the remote con-
troller, 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, or repaired
by the user.
• An improperly handled air conditioner may cause fire or
electric shock.
Q _ airD°notinsertyour flnger, astick, or otherobjectsintotheinletor outlet.
• This may cause injury, since the fan inside rotates at high
speeds during operation.
Meanings of symbols used in this manual
Q : Be sure not to do.
O : Be sure to followthe instruction.
: Never insert your finger or stick, etc.
: Never step onto the indoor/outdoor unit and do not put anything on them.
Z_ : Danger of electric shock. Be careful.
O: Be sure to disconnect the power supply plug from the power outlet.
: Be sure to shut off the power.
O_ n case of an abnormal condition (such as a burning smell),stop the air conditioner and disconnect the power plug or
turn the breaker OFF.
• A continued operation in the abnormal state may cause a
malfunction, fire, 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. In this case, consult
your dealer. If arepair involves recharging the unit with
refrigerant, ask the service technician for details.
• The refrigerant used in the air conditioner is safe. Normally,
it does not leak. However, if refrigerant leaks and comes in
contact with a heat source such as a fan heater, kerosene
heater, or cooking stove, it will create a harmful gas.
i!k CAUTION
Do not touch the air inlet or the aluminum fins of the
Q indoor/outdoor unit.
• This may cause injury
Do not use insecticides or flammable sprays on the unit.
• This may cause a fire or deformation of the unit.
Do not expose pets or houseplants to direct airflow.
• 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.
En-1

QDo 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 fire.
Do not charge or disassemble the batteries, and do not
throw them into a fire.
• This may cause the batteries to leak, or cause a fire or explo-
sion.
Do not operate the unit for more than 4 hours at high hu-
midity (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 preci-
sion devices or art objects.
• This may cause deterioration of quality, or harm to animals
and plants.
Do not expose combustion appliances to direct airflow.
• This may cause incomplete combustion.
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 fire.
@
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 fluid comes in contact with your skin or clothes,
wash them thoroughly with clean water.
• If the battery fluid comes in contact with your eyes, wash them
thoroughly with clean water and immediately seek medical
attention.
Ensure that the area is well-ventilated when the unit is oper-
ated 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, per-
form inspection and maintenance in addition to normal
cleaning.
• Dirt or dust in the unit may create an unpleasant odor, con-
tribute to growth of fungi, such as mold, or clog the drain pas-
sage, 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 flower vase, on it.
• This may cause fire 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.
......
Dirty filters cause condensation in the air conditioner which will con-
tribute to the growth of fungi such as mold. It is therefore recommended
to clean air filters every 2 weeks.
®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, fire, or
electric shock.
Provide a dedicated power supply for the air conditioner.
• A non-dedicated power supply may cause overheating or
fire.
Do not install the unit where flammable gas could leak.
• If gas leaks and accumulates around the unit, it may cause
an explosion.
0Ground the unit correctly.
• Do not connect the ground wire to a gas pipe, water pipe,
lightning rod, or a telephone ground wire. Improper grounding
may cause electric shock.
....... .......
OInstall a Ground Fault Interrupt (GFI) circuit breaker de-
pending on the installation location of the air conditioner
(such as highly humid areas).
• If the Ground Fault Interrupt (GFI) 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 furni-
ture.
In case of an abnormal condition
Immediately stop operating the air conditioner and consult your dealer.
En-2

• OPERATING INSTRUCTIONS •
Indoor unit
Air cleaning filter
(Anti-Allergy Enzyme Filter)_ Front panel
Air filter
(Catechin air filter) -- Air inlet
Air outlet
Horizontal vane Display section
0 0
Operation indicator Operation indicator
lamp
Outdoor unit
Outdoor units may be different in appearance.
Emergency
operation
switch
-- Remote control
receiving section
Air inlet (back and side)
ping
ge hose
Drain outlet
Remote controller
Operation
section
Signal transmitting
section
Distance of signal :
About 20 ft (6 m)
Beep(s) is (are) heard
fromthe indoor unit when
the signal is received.
ONtOFF
bu_on
FAN speed
control button
Operation
select button
ECONO
COOL --
button
VANE --
control button
button
rature buttons
Off-timer button I'_
On-timer button r_
WIDE VANE button
TIME set buttons
Increase time
Decrease time
CLOCK button r_
-- RESET button
-- Lid
Slide down to open
Remote controller
holder
•Install the remote control-
ler holder in a place where
the signal can be received
by the indoor unit.
Only use the remote controller provided with the unit.
Do not use other remote controllers,
En-3

Before operation: Insert the power supply plug into the power outlet and/or
turn the breaker on.
Installing the remote controller batteries
.....PressRESET4"2
,,. e oveth;ont,,,
'a,:elrit?eA tteries
Install the front lid
Make sure the polarity of the batteries is correct.
Do not use manganese batteries. 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. However, batteries with
expired shelf lives last shorter.
Press RESET gently using a thin instrument.
If the RESET button is not pressed, the remote controller may not operate
correctly.
Setting current time
Press CLOCK
Press CLOCK again
Press the TIME buttons to set
the time
Each press increases/decreases
the time by 1 minute (10 min-
utes when pressed longer)
• Press CLOCK gently using a thin instrument. _!-[P--,_--/I,_?'r,
Changing temperature units (°F--+°C)
Unit is preset with °F.
]i , Press RESET while
the temperature but-
tons are pressed.
• Press RESET gently using a thin instrument.
To change temperature unit from °C to °F, press RESET. I
En-4

• OPERATING INSTRUCTIONS •
ON/OFF
Press _ to start the operation.
MODE
........._Press _ to select operation mode. Each press
changes mode in the following order:
m 1.
_::_(IFEEL)
,L
O (C_OL)
6 (D_Y)
(FAN)
_ Press _ or _ to set the temperature.
Each press raises or lowers the temperature by I°F
(1°C).
ON/OFF
Press @ to stop the operation. 00rr
• The same setting is selected the next time by simply pressing _.
Operation indicator lamp
The operation indicator lamp shows the operation state of the unit.
Indication Operation state Room temperature
¢_. .$, The unit is operating to reach the set About 4°F (2°C) or
more away from set
_'.... temperature temperature
About 2 to 4°F (1 to
"+_: o The room temperature is approach- 2oc) from set tem-
ing the set temperature perature
_°_.1.Lighted o Not lighted
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 77°F
(25°C), COOL is selected (set temperature: 75°F [24°C]). When the room
temperature is lower than 77°F (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 4°F (2°C) higher than the set tempera-
ture. In this case, please wait until the room temperature drops to within
4°F (2°C) of the set temperature.
OCOOL mode
Enjoy cool air at your desired temperature.
Do not operate COOL mode at very low outside temperatures.
(less than 14°F [-10°C])
Water condensed in the unit may drip and wet or damage furniture, etc.
6DRY 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.
When the remote controller cannot be used...
Emergency operation can be activated by pressing the emergency operation
switch (EO.SW) on the indoor unit.
Each time the E.O.SW is pressed, the operation changes in
the following order:
Operation indicator lamp
E O Emergency COOL
o Stop
Set temperature : 75°F
(24°C)
Fan speed : Medium
Horizontal vane : Auto
Note:
The first 30 minutes of operation is test run. Temperature
control does not work, and fan speed is set to High.
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 repre-
sentative because the setting of the unit needs to be changed.
En-5

(AUTO)
The vane is set to the most efficient airflow direction: horizontal position.
%, (Manual)
For efficient air conditioning, select upper position for COOL/DRY. During
COOL/DRY, when the vane is set to position (4) or (5), the vane auto-
matically moves to horizontal position after 0.5 to 1 hour to prevent any
condensation from dripping.
(Swing)
The vane moves up and down intermittently.
FAN
Press _ to select fan speed. Each press changes
fan speed in the following order:
i
(AUTO) (Low) (Med.) (High)
•Two short beeps are heard from the indoor unit when set to AUTO.
VAN E
Press _ to select airflow direction. Each press
changes airflow direction in the following order:
¢_----_ ----+ ,....+ ,...._ _...._ t
UTO) (1) (2) (3) (4) (5) (SWIN
• Two short beeps are heard from the indoor unit when set to AUTO.
WIDEVANE
Press _ to select horizontal airflow direction. Each
press changes airflow direction in the following order:
En-6

• OPERATINGINSTRUCTIONS•
ECONOCOOL
Press 8L_J during COOL mode _ to start
ECONO COOL operation.
The unit performs swing operation vertically in various cycle according
to the temperature of the unit. Set temperature is set 4°F (2°C) higher
automatically.
ECONOCOOL
Press (_ again to cancel ECONO COOL operation.
• ECONO COOL operation also is cancelled when the VANE or POW-
ERFUL button is pressed.
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 (2°C) higher, it is
possible to perform cooling operation with keeping comfort. As a result, energy
can be saved.
POWERFUL
Press _ during COOL mode _ to start
POWERFUL operation.
Fan speed : Exclusive speed for POWERFUL mode
Horizontal vane : Set position, or downward airflow position during
AUTO setting
• Temperature cannot be set during POWERFUL operation.
POWERFUL
Press _ again to cancel POWERFUL operation.
• POWERFUL operation also is cancelled automatically in 15 minutes,
or when the ON/OFF, FAN, or ECONO COOL button is pressed.
@START @STOP
__ Press _ or [_ during operation to set the timer.
QSTART(ON timer) " The unit will turn ON at the set
time.
@STOP (OFF timer) " The unit will turn OFF at the set
time.
* ®÷1 or ®÷0 blinks,
*Make sure that the current time is set correctly,
| Press | (Increase) and | (Decrease) to set the
time of timer.
Each press increases or decreases the set time by 10 minutes.
QSTART @STOP
Press _ or [_ again to cancel timer.
Note:
• ON and OFF timers can be set together. ,_t mark indicates the order of timer
operations.
• If power failure occurs while ON/OFF timer is set, see _ "Auto restart
function"
En-7

Instructions:
•Switch off the power supply or turn off the breaker before cleaning. •Use only diluted mild detergents.
• Be careful not to touch the metal parts with your hands. •Do not expose parts to direct sunlight, heat, or fire to dry.
• Do not use benzine, thinner, polishing powder, or insecticide. •Do not use water hotter than 120°F (50°C).
Air cleaning filter
(Anti-Allergy Enzyme Filter)
Back side of air filter
Clean every 3 months:
• Remove dirt by a vacuum cleaner.
• Put it back to its original position.
When dirt cannot be removed by vacuum cleaning:
• Soak the filter and its frame in lukewarm water before rinsing it.
(Diluted mild detergents can be used when dirt cannot be removed.)
• After washing with water, dry it well in shade. Install all tabs of the air
filter.
Every year:
• Replace it with a new air cleaning filter for best performance.
• Parts Number
Front panel
Do not open the front panel up past the level position.
• The panel may come off in order to prevent it from being dam-
aged.
• The panel may also come off if the upper part of the panel is
pulled down.
Ifthe front panel comes off, attach it as explained
below.
1. Keep the front panel level with one hand, and 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.
2. Close the front panel.
Do not exceed
.~ _*,
""'2.':--L-
_vable range
Air filter (Catechin air filter)
• Remove dirt by a vacuum cleaner, or wash with water.
• After washing with water, dry it well in shade.
What is "Catechin air filter" ?
Catechin is a bioflavonoid that is found in green tea that has both antivi-
ral and antioxidant qualities. In addition to these benefits, Catechin also
offers excellent deodorizing characteristics. Catechin air filter uses this
compound to not only improve air quality but also prevent the spread of
bacteria and viruses in the room.
ilean the filters regularly for best performance and to
reduce power consumption.
Dirty filters cause condensation in the air conditioner
which will contribute to the growth of fungi such as
mold. It is therefore recommended to clean air filters
every 2 weeks.
En-8

• OPERATINGINSTRUCTIONS•
Even if these items are checked, when the unit does not recover from the
troub e, stop us ng the a r cond toner and consu t your dea er.
The unit cannot be operated. • Is the breaker turned on?
• Is the power supply plug connected?
• Is the ON timer set? I_
The unit cannot be operated • This protects the unit according to instruc-
for about 3 minutes when tions from the microprocessor. Please
restarted, wait.
Mist is discharged from the air • The cool air from the unit rapidly cools tools-
outlet of the indoor unit. ture in the air inside the room, and it turns
into mist.
• This is for the swing operation of the HORI-
ZONTAL /VERTICAL VAN E to be performed
normally.
The swing operation of the
HORIZONTAL /VERTICAL
VANE is suspended for a
while, then restarted.
The air flow direction changes
during operation.
The direction of the horizontal
vane cannot be adjusted with
the remote controller.
The unit starts operation by
itself when the main power
is turned on, though it isn't
operated 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 flow is automatically set to horizon-
tal position to prevent water from condensing
and dripping.
• These models are equipped with an auto re-
start function. When the main power is turned
off without stopping the unit with the remote
controller and is turned on again, the unit
starts operation automatically in the same
mode as the one set with the remote control-
lerjust before the shutoff of the main power.
Refer to "Auto restart function" I_.
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.
Water leaks from the outdoor
unit.
•When the outside temperature is low dur-
ing cooling operation, the fan operates
intermittently to maintain sufficient cooling
capacity.
• During COOL and DRY operations, pipe or
pipe connecting sections are cooled and this
causes water to condense.
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The display on the remote • Are the batteries exhausted? I_
controller does not appear or • Is the polarity (+, -) of the batteries correct?
it is dim. The indoor unit does
not respond to the remote • Are any buttons on the remote controller of
control signal, other electric appliances being pressed?
Do • Is the temperature setting appropriate?
The room cannot be cooled
sufficiently. • Is the fan setting appropriate? Please change
fan speed to higher setting. I_
• Are the filters clean?
• 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 insufficient cooling effect.
• When the outside temperature is high, the
cooling effect may not be sufficient.
_
The air from the indoor unit • Are the filters clean? I_
smells strange. • 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.
so
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 flowing 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 • This is the switching sound in turning on/off
from the indoor unit. the fan or the compressor.
The sound of water flowing • This is the sound of refrigerant or condensed
is heard, water flowing in the unit.
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 operation indicator lamp blinks.
• When the breaker trips frequently.
• The remote control signal is not received in a room where an electronic ON/OFF
type fluorescent lamp (inverter-type fluorescent lamp, etc.) is used.
• Operation of the air conditioner interferes with radio or TV reception. An ampli-
fier may be required for the affected device.
• When an abnormal sound is heard.
En-9