Mitsubishi Electronics Msz12un User Manual

SPLIT-TYPE AIR CONDITIONERS  
OPERATING INSTRUCTIONS  
MSZ09UN  
MSZ12UN  
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  
later reference.  
Be sure to receive a guarantee card from your dealer and check that the purchased data a  
entered correctly.  
This air conditioner should not be installed by the customer. (Safety and performance function  
CONTENTS  
SAFETY PRECAUTIONS .................................................................................... 2  
NAME OF EACH PART ....................................................................................... 4  
PREPARATION BEFORE OPERATION .............................................................. 6  
I FEEL... AUTO OPERATION .............................................................................. 7  
MANUAL OPERATION (COOL, DRY, HEAT) ...................................................... 8  
AIR FLOW VELOCITY AND DIRECTION ADJUSTMENT ................................... 9  
TIMER OPERATION (ON/OFF TIMER) ............................................................. 10  
WHEN THE AIR CONDITIONER IS NOT GOING TO BE USED  
FOR A LONG TIME ............................................................................................ 10  
MAINTENANCE ................................................................................................. 11  
CLEANING THE AIR FILTER AND THE DEODORIZING FILTER (OPTION) ... 11  
REPLACEMENT OF THE DEODORIZING FILTER (OPTION)/  
AIR CLEANING FILTER (OPTION) ................................................................... 12  
BEFORE CONTACTING THE SERVICE REPRESENTATIVE,  
CHECK THE FOLLOWING AGAIN .................................................................... 12  
WHEN YOU THINK THAT TROUBLE HAS OCCURRED ................................. 13  
INSTALLATION, RELOCATION AND INSPECTION ......................................... 14  
ep this manual carefully for  
and shop name, etc. are  
ns cannot be assured.)  
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.  
Marks and their meanings are as shown below.  
Incorrect handling could cause a serious hazard, such as death, serious injury,  
etc. with a high probability.  
WARNING  
Incorrect handling could cause a serious hazard depending on the conditions.  
CAUTION  
Meanings of symbols used in this manual are as shown below.  
Be sure not to do.  
Be sure to follow the instruction.  
(Black)  
(Black)  
(Yellow)  
(Blue)  
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 mark positions and safety devices  
ENCLOSURE  
FRONT PANEL  
AIR OUTLET  
ENCLOSURE  
2
WARNING  
This air conditioner is NOT intended for use by children or infirm persons without supervisions.  
Do not turn the breaker off/on during  
operation.  
Do not insert your finger or a stick, etc.  
into the air inlet/outlet.  
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 con-  
troller.  
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.  
Do not expose your skin directly to cool  
air for a long time.  
Repairs or relocation should not be  
done by the customer.  
This could damage your health.  
If this is done incorrectly, it may cause a fire, an elec-  
tric shock, or injury from the unit falling, water leak-  
ing, etc.  
Consult your dealer.  
When an abnormality (burning smell,  
etc.) occurs, stop the air conditioner  
and turn off the breaker.  
The customer should not install this  
unit.  
If this is done incorrectly, it may cause a fire, an  
electric shock, or injury from the unit falling, water  
leaking, etc.  
If the unit continues to be operated in an abnormal  
condition, it may cause a fire, trouble, etc. In this  
case, consult your dealer.  
Consult your dealer.  
SAFETY PRECAUTIONS  
CAU  
When the air filter is to be  
Do not clean the air con-  
ditioner with water.  
Ventilate well in using the  
unit with a stove, etc.  
removed, do not touch  
the metal parts of the in-  
door unit.  
Water may enter the unit and de-  
grade the insulation. This may  
cause an electric shock.  
An oxygen shortage may occur.  
This may cause an injury.  
When the unit is to be  
cleaned, switch it off and  
turn off the breaker.  
Do not put a pet or house-  
plant where it will be ex-  
posed to direct airflow.  
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.  
Since the fan rotates at high  
speed during operation, this may  
cause an injury.  
This could injure the pet or plant.  
Do not operate switches  
with wet hands.  
Do not use an insecticide  
or flammable spray.  
Do not put a stove, etc.  
where they are exposed  
to direct airflow.  
This may cause an electric shock.  
This may cause a fire or deforma-  
tion of the cabinet.  
This may cause imperfect com-  
bustion.  
UTION  
When the unit is not go-  
ing to be used for a long  
time, turn off the breaker.  
Do not operate the unit  
for a long time in high hu-  
midity, e.g. leaving a door  
or window open.  
Do not charge or disas-  
semble the batteries and  
do not throw them into a  
fire.  
Otherwise, dirt may collect and  
this may cause a fire.  
In the cooling mode, if the unit is  
operated in a room with high hu-  
midity (80% RH or more) for a long  
time, water condensed in the air  
conditioner may drop and wet or  
damage furniture, etc.  
This may result in leakage, fire or  
an explosion.  
If liquid from the alkaline  
batteries gets onto your  
skin or clothes, wash it  
well with clean water.  
Do not step onto an un-  
stable bench when main-  
taining the unit, etc.  
Do not step or put any-  
thing on the indoor/out-  
door unit.  
If liquid from the alkaline batter-  
ies gets into your eyes, wash  
them well with clean water and  
consult a doctor at once.  
This may cause an injury, etc. if  
you fall down.  
This may cause an injury, etc. if  
you or something falls down.  
Replace the 2 batteries  
with new ones of same  
type.  
Do not leave the unit on  
an installation stand  
which is damaged.  
Using an old battery together with  
a new one may result in heat gen-  
eration, leakage or an explosion.  
The unit may fall and this may  
cause an injury.  
3
SAFETY PRECAUTIONS  
For installation  
WARNING  
Consult your dealer for installation of the air conditioner.  
CAUTION  
If the air conditioner is installed in a high  
Ground the unit.  
humidity area or near a water source, a  
Ground Fault Interrupt (GFI) circuit  
breaker should be installed to protect  
against an electric shock.  
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.  
Do not install the unit where flammable  
gas could leak.  
If gas leaks and collects around the unit, it may  
cause an explosion.  
Drain should be fully drained.  
If the drainage route is incomplete, water may drop  
from the unit. This may wet and damage the furni-  
ture.  
4
NAME OF EACH PART  
Indoor unit  
MSZ09UN  
MSZ12UN  
Air cleaning filter  
(White bellows  
type) (OPTION)  
Front panel  
Air inlet  
Deodorizing filter  
(Gray sponge  
type) (OPTION)  
Remote control  
receiving section  
Air filter  
Vertical vane  
Remote  
controller  
Horizontal vane  
Operation section  
Display section  
(When the front panel is opened)  
MSZ09UN  
MSZ09UN  
Operation  
Indicator lamp  
Emergency  
operation switch  
Receiving section  
Operation  
MSZ12UN  
MSZ12UN  
Operation Indicator  
Emergency  
operation switch  
Indicator lamp  
Receiving  
section  
Outdoor unit  
Air inlet (back and side)  
Piping  
Drainage hose  
Service panel  
Air outlet  
Drain outlet  
NAME OF EACH PART  
Remote controller  
Signal transmitting section  
Operation display section  
CLOCK  
AMPM  
AMPM  
ON/OFF (operate/  
stop) button  
TOO  
WARM  
TOO  
ON/OFF  
COOL  
Temperature buttons  
(This diagram shows an overall view.)  
PREPARATION BEFORE OPERA  
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.  
I
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 functionsets 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 7 for details.)  
Breaker for the air conditioner  
Turn the breaker on.  
I
Remote controller (How to set the batteries and the current time)  
Remove the front lid and insert bat-  
teries. Then reattach the front lid.  
Press the CLOCK set button.  
1
3
Press using  
a thin stick.  
Insert the minus pole of the batteries first.  
Check if the polarity of the batteries is correct.  
Insert the minus  
pole of the  
batteries first.  
HR.  
MIN.  
Press the  
and  
button  
4
(TIME SET button) to set the current  
time.  
Press the RESET button.  
2
FAN  
STOP  
START  
HR.  
Press using  
a thin stick.  
I
FEEL COOL  
VANE  
HEAT DRY  
MODE  
MIN.  
RESET CLOCK  
I If the RESET button is not pressed, the remote control-  
ler may not operate correctly.  
HR.  
I Each time the  
button is pressed, the set time in-  
MIN.  
creases by 1 hour, and each time the  
pressed, the set time increases by 1 minute.  
button is  
Press the CLOCK set button again  
and close the front lid.  
5
6
ATION  
When the remote controller cannot  
be used (emergency operation)  
Handling of the remote controller  
The range that the signal can reach is about  
20 ft. when the remote controller is pointed at the  
front of the indoor unit.  
When a button is pressed, one or two beeps will  
be heard from the indoor unit. If no sound is heard,  
operate again.  
Use the remote controller carefully.  
If it is dropped, thrown or it gets wet, the remote  
controller may not operate.  
When the batteries of the remote controller run out or  
the remote controller malfunctions, the emergency op-  
eration can be done using the EMERGENCY OPERA-  
TION switch.  
Press the EMERGENCY OPERA-  
TION switch.  
1
*
Each time the EMERGENCY OPERATION  
switch is pressed, the unit will operate in order  
of EMERGENCY COOL MODE, EMERGENCY  
HEAT MODE and STOP MODE.  
When installing on a wall, etc.  
Install the remote controller holder in a position  
where the signal reception sound (beep) can be  
However, when the EMERGENCY OPERA-  
TION switch is once pressed, the unit will oper-  
ate in test run for 30 minutes and then the op-  
eration mode shifts to EMERGENCY MODE.  
ON/OFF  
heard from the indoor unit when the  
pressed.  
button is  
MSZ09UN  
MSZ12UN  
How to install/remove the remote controller  
Installing Insert the remote controller downward.  
Removing Pull it up.  
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.  
Remote controller  
holder  
Operation mode  
Set temperature  
Fan speed  
COOL  
75 °F  
HEAT  
75 °F  
Dry-cell batteries  
Reference for replacing batteries  
Medium  
Auto  
Medium  
Auto  
Horizontal vane  
When the indoor unit does not respond to the signal  
from the remote controller, or the display becomes  
dim, replace the batteries with new ones (size AAA).  
The operation mode is indicated by the Operation Indi-  
cator lamp on the indoor unit as following figures.  
Though both alkaline batteries and manganese  
batteries can be used, alkaline batteries are rec-  
ommended because their service life is longer than  
that of manganese batteries.  
Operation Indicator lamp  
MSZ09UN  
EMERGENCY COOL EMERGENCY HEAT  
STOP  
The service life of an alkaline battery is about 1 year.  
However, a battery which the time limit is ap-  
proaching may be exhausted soon. The recom-  
mended usable time limit is indicated (month/year)  
on the bottom of the battery.  
Operation  
Indicator  
Operation  
Indicator  
Operation  
Indicator  
MSZ12UN  
EMERGENCY COOL EMERGENCY HEAT  
Replace the 2 batteries with new ones of the same  
type.  
STOP  
Operation Indicator  
Operation Indicator  
Operation Indicator  
Do not use rechargeable batteries.  
To prevent liquid leakage, take out all batteries  
when the remote controller is not going to be used  
for a long time.  
To stop the emergency operation,  
press the EMERGENCY OPERATION  
switch once (in case of EMER-  
GENCY HEAT MODE) or twice (in  
case of EMERGENCY COOL MODE).  
Dispose of exhausted batteries in the correct man-  
ner.  
I
I FEEL... AUTO OPERATION  
To start operation:  
ON/OFF  
With the  
(I FEEL...)auto operation mode,  
Press the  
button.  
the optimum room condition can be set automati-  
cally with a one-touch operation.  
I
When the “  
(I FEEL...)mode is selected, the air  
conditioner is automatically controlled at the optimum  
temperature.  
To stop operation:  
ON/OFF  
Press the  
button.  
I
CLOCK  
AMPM  
If you feel slightly warm:  
TOO  
Press the WARM button to lower the tempera-  
ture.  
TOO  
TOO  
I
ON/OFF  
WARM  
COOL  
One press lowers the temperature by about 2 °F.  
If you feel slightly cool:  
TOO  
Press the COOL button to raise the tempera-  
FAN  
STOP  
I
ture.  
I FEEL COOL  
One press raises the temperature by about 2 °F.  
VANE  
START  
HR.  
HEAT DRY  
When (I FEEL...)is not selected, press  
MODE  
MODE  
the  
button until it is set.  
MIN.  
Each time the button is pressed, the operation mode is  
changed in sequence: (I FEEL...) (COOL) (DRY)  
(HEAT)  
RESET CLOCK  
FAN  
STOP  
I FEEL COOL  
VANE  
START  
HR.  
HEAT DRY  
MODE  
MIN.  
Description of I FEEL...mode  
Details of operation  
According to the room temperature when the operation starts, the opera-  
tion mode is automatically set to COOL, DRY or HEAT. 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 opera-  
tion mode selected first is not changed even if the room temperature  
changes. If the operation mode does not match the room condition, se-  
lect the appropriate operation mode by pressing the MODE button.  
Room temperature:  
About 77 °F or higher  
COOL  
About 77 °F - 73 °FDRY  
About 73 °F or lower  
HEAT  
Details of auto operation  
Room temperature  
when started  
Operation mode  
Target temperature  
(initial state)  
About 77 °F or higher  
COOL  
DRY  
About 75 °F  
About 77 °F - 73 °F  
About 73 °F or lower  
HEAT  
About 79 °F  
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.  
HEAT: When the room temperature is 4 °F lower 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 rises to within 4 °F of the set temperature and then change the  
set temperature.  
Details of display on the indoor unit  
The operation indicator at the right side of the indoor unit indicates  
the operation state.  
MSZ09UN  
MSZ12UN  
Operation Indicator  
Lighted  
Lighted  
Operation  
Indicator  
Not lighted  
Not lighted  
Operation indicator lamp  
MSZ09UN  
Difference between target  
temperature and room temperature  
Indication  
Operation state  
This shows that the air conditioner is operating to reach the  
target temperature. Please wait until the target temperature  
is obtained.  
About 4 °F or more  
This shows that the room temperature is approaching the  
target temperature.  
About 4 °F or less  
MSZ12UN  
Indication  
Difference between target  
temperature and room temperature  
Operation state  
This shows that the air conditioner is operating to reach the  
target temperature. Please wait until the target temperature  
is obtained.  
About 4 °F or more  
This shows that the room temperature is approaching the  
target temperature.  
About 4 °F or less  
Description of AUTO RESTART FUNCTION”  
I 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.  
I 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.  
I 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.  
I If the unit is operated in I FEEL ...mode before power failure, the operation is not stored in the memory. In I FEEL ...”  
mode, the operation is decided by the initial room temperature at (re)start.  
I Since the air conditioner has been shipped from the factory with the COOL mode saved in the memory for auto restart  
function, it starts cooling operation when the user turns on the main power for the first time after installation.  
7
MANUAL OPERATION (COOL, D  
To select the COOL, DRY or HEAT mode  
ON/OFF  
Press the  
button.  
1
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) →  
(HEAT)  
To stop operation:  
˚F  
ON/OFF  
Press the  
button.  
CLOCK  
AMPM  
I
After the operation mode is set once, the operation  
starts in the same mode as the one set previously  
ON/OFF  
from the next time by simply pressing the  
button.  
TOO  
TOO  
ON/OFF  
WARM  
COOL  
When the set temperature is to be changed:  
TOO  
WARM  
I
I Press the  
button to lower the temperature. One  
press lowers the temperature by about 2 °F.  
TOO  
COOL  
I Press the  
press raises the temperature by about 2 °F.  
button to raise the temperature. One  
FAN  
STOP  
I FEEL COOL  
VANE  
START  
HR.  
In DRY operation  
HEAT DRY  
I The temperature control (temperature setting) can-  
not be done.  
MODE  
I The room temperature is slightly lowered in this  
operation mode.  
MIN.  
The details of the display on the indoor unit  
are explained on page 7.  
RESET CLOCK  
I
NOTE  
When the ambient temperature is too high, the room tem-  
perature may not reach the set temperature since the unit  
operates to cool the room under a high load.  
8
DRY, HEAT)  
CONVENIENT INFORMATION  
COOL For effective cooling  
1 Close the windows and pull 2 Paste a heat shield film (gen- 3 Block the outdoor unit from di-  
down blinds. Sunshine is re-  
duced and cooling efficiency  
increases.  
erally available) on the window.  
Heat entering the room is re-  
duced.  
rect sunlight. This saves en-  
ergy.  
HEAT Comfortable warmth depends on the temperature difference between the indoor and  
the outdoor.  
It is recommended that the set temperature in the heating operation does not differ from the external tem-  
perature too much.Though there is a regional difference, as a reference, a set temperature between about  
71 °F and 75 °F would be suitable.  
DRY  
The humidity at which people feel comfortable  
When air contains too much moisture, people feel uncomfortable. Humidity is related to temperature and  
wind. The humidity at which people feel comfortable is 60 % - 75 % RH in summer, 55 % - 70 % RH in  
winter.  
Description of AUTO RESTART FUNCTION”  
Refer to page 7.  
AIR FLOW VELOCITY AND DIRE  
To change the AIR FLOW velocity, press  
FAN  
AIR FLOW velocity and direction can be selected  
as required.  
I
the  
button.  
Each time the button is pressed, the fan speed is  
changed in sequence: (Low) (Med.) (High)  
(AUTO)  
Use the  
(High) notch to cool/heat the room more.  
If the operating sound of the air conditioner disturbs your  
sleep, use the (Low) notch.  
To change the AIR FLOW blowing direc-  
VANE  
I
tion vertically, press the  
button.  
Each time the button is pressed, the angle of the hori-  
zontal vane is changed in sequence: (1) (2) →  
(3) (4) (5) (SWING) →  
CLOCK  
AMPM  
(AUTO)  
SWING OPERATION  
TOO  
TOO  
ON/OFF  
WARM  
COOL  
Use the swing operation for the air flow to reach all cor-  
ners of the room.  
Recommended horizontal  
vane range  
1
2
COOL  
DRY  
FAN  
STOP  
Use the  
ally.  
(AUTO) position usu-  
I FEEL COOL  
3
Use position (1) or  
(2) in the  
VANE  
START  
HR.  
COOL or DRY mode and use posi-  
tions (3) to (5) in the HEAT mode  
when adjusting to your require-  
ments.  
4
HEAT  
HEAT DRY  
5
MODE  
MIN.  
NOTE  
I In the cooling operation, when the air conditioner is op-  
erated 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.  
I Adjust the vertical AIR FLOW direction using the remote  
controller. If the horizontal vane is moved manually, it  
may cause trouble.  
RESET CLOCK  
I In the heating operation, if the air flow temperature is  
too low or when defrosting is being done, the horizontal  
vane position is set to (1).  
ECTION ADJUSTMENT  
Auto air flow direction control operation  
VANE  
I When the AUTO mode is selected with the  
button, the position of the horizontal vane is automatically set  
to correspond to the operation mode for effective operation.  
(1) HEAT  
When the air flow temperature is too low,  
the air is blown out horizontally.  
When the air flow temperature rises,  
the air is blown out downwards.  
(2) COOL, DRY  
The air is blown out horizontally.  
To change the horizontal direction of the air flow, move the vertical vane manu-  
ally.  
I
Adjust the vane before operation starts.  
Since the horizontal vane moves automatically, your fingers may be caught.  
9
TIMER OPERATION (ON/OFFTIMER)  
TIMER  
How to set the ON timer  
It is convenient to set the timer when you go to  
bed, when you get home, when you get up, etc.  
START  
Press the  
button during operation.  
1
2
Each time the button is pressed, the ON timer mode  
alternates between ON and OFF.  
HR.  
Set the time of the timer using the  
MIN.  
and  
buttons.  
HR.  
Each time the  
creases by 1 hour; each time the  
pressed, the set time increases by 10 minutes.  
button is pressed, the set time in-  
MIN.  
button is  
AMPM  
To release the ON timer:  
START  
Press the  
button.  
I
TOO  
TOO  
ON/OFF  
WARM  
COOL  
How to set the OFF timer  
STOP  
Press the  
button during operation.  
1
2
Each time the button is pressed, the OFF timer mode  
alternates between ON and OFF.  
FAN  
STOP  
HR.  
I FEEL COOL  
Set the time of the timer using the  
MIN.  
VANE  
START  
HR.  
and  
buttons.  
HEAT DRY  
HR.  
Each time the  
creases by 1 hour; each time the  
pressed, the set time increases by 10 minutes.  
button is pressed, the set time in-  
MIN.  
button is  
MODE  
MIN.  
To release the OFF timer:  
STOP  
Press the  
button.  
RESET CLOCK  
I
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.)  
I If the current time has not been set, the timer operation can-  
not 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 should start operating  
at the same time that power is restored.  
10  
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:  
When the air conditioner is to be  
used again:  
Perform the FAN operation for 3 or 4 hours  
to dry the inside of the air conditioner.  
Clean the air filter and install it in the in-  
door unit.  
1
1
(Refer to page 11 for cleaning instructions.)  
To perform FAN operation, set the remote controller to  
the highest temperature in the MANUAL COOL mode.  
(Refer to page 8.)  
Clean the  
filter before  
installing.  
Turn off the breaker.  
Check that the air inlet and outlet of the  
2
indoor/outdoor units are not blocked.  
2
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.  
Check that the ground is connected correctly.  
CAUTION  
Remove the batteries from the remote con-  
troller.  
3
3
Ground the unit.  
Do not connect the ground to a gas pipe, water pipe,  
lightning rod or the ground of a telephone. If the ground-  
ing is incorrect, it may cause an electric shock.  
CAUTION  
To prevent liquid leakage, take out all batteries when  
the remote controller is not going to be used for a  
long time.  
MAINTENANCE  
Before starting maintenance  
Cleaning the indoor unit  
Turn off the breaker.  
Clean the unit using a soft dry cloth.  
I
I
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.  
Do not use gasoline, benzine, polishing powder, deter-  
gent and insecticide. The unit may be damaged.  
CLEANING THE AIR FILTER AND  
THE DEODORIZING FILTER (OPTION)  
Do not open the front panel up past the level position in order to prevent it from being damaged.  
Cleaning the air filter  
(about once every 2 weeks)  
Cleaning the deodorizing filter  
(about once every 2 weeks)  
Remove the air filter.  
Remove the air filter, and then remove the  
deodorizing filter (Gray sponge type).  
1
1
Open the front  
panel, then  
remove/replace  
the filter.  
I The deodorizing filter is harmless to people.  
However, to keep its effectiveness, be sure  
to hold the frame and not to touch the sur-  
face of the filter with your hand.  
Air filter  
Remove.  
CAUTION  
When the air filter is to be removed, do not touch  
the metal parts of the indoor unit.  
This may cause an injury.  
Deodorizing filter  
Soak the filter together with its frame in  
lukewarm water for about 15 minutes.  
Remove dirt from the air filter using a  
vacuum cleaner or by washing the filter  
with water.  
2
2
I If the dirt is conspicuous, use a solution of  
detergent in lukewarm water.  
I If hot water (120°F or more) is used, the filter  
may be deformed.  
I Do not use a scrubbing brush or sponge. This  
may damage the surface of the filter.  
I Do not use a chlorine detergent.  
I If dirt is conspicuous, wash the filter with a  
solution of detergent in lukewarm water.  
I If hot water (120°F or more) is used, the filter  
may be deformed.  
After washing with water/lukewarm water,  
dry the deodorizing filter well in the shade.  
3
4
After washing with water/lukewarm water,  
dry the air filter well in the shade.  
3
4
I Do not expose the deodorizing filter to direct  
sunlight or heat from a fire when drying it.  
I Do not expose the air filter to direct sunlight  
or heat from a fire when drying it.  
Install the deodorizing filter, and then in-  
stall the air filter.  
Install the air filter.  
Install.  
Install.  
11  
REPLACEMENT OF THE DEODORIZING FILTER  
(OPTION)/AIR CLEANING FILTER (OPTION)  
When the capacity is lowered because of dirt, etc., it is necessary to replace the deodorizing filter/air cleaning filter.  
Deodorizing filter replacement  
(about once a year)  
Air cleaning filter replacement  
(about once every 4 months)  
Remove the air filter.  
Remove the air filter.  
1
1
Air filter  
Air filter  
Remove the deodorizing filter (Gray  
sponge type).  
Remove the air cleaning filter (White bel-  
lows type).  
2
2
Air cleaning filter  
Deodorizing filter  
Install a new deodorizing filter.  
Install a new air cleaning filter.  
3
4
3
4
Install the air filter and securely close the  
front panel.  
Install the air filter and securely close the  
front panel.  
Deodorizing filter  
Air cleaning filter  
I Cleaning is necessary about once every 2 weeks.  
However, if dirt is conspicuous, clean more often.  
I When the color the filter is not restored even if the  
filter is washed as the procedure shown on page 11  
or when the filter becomes black, replace the filter  
with a new one.  
I If the air cleaning filter is clogged, it may lower the  
units capacity or cause condensation at the air out-  
let.  
I The air cleaning filter is disposable. The standard  
usable term is about 4 months. However, if the color  
of the filter turns to dark brown, replace the filter at  
once.  
I Standard interval for filter replacement is about 1  
year.  
Optional parts  
Optional parts are available from your local dealer.  
Model  
MSZ09UN  
MSZ12UN  
Name of parts  
DEODORIZING FILTER  
AIR CLEANING FILTER  
MAC-1800DF  
MAC-1300FT  
MAC-1600DF  
MAC-1100FT  
12  
BEFORE CONTACTING THE SERVICE REPRE-  
SENTATIVE, CHECK THE FOLLOWING AGAIN  
The air conditioner  
cannot be operated.  
d
The room cannot be  
cooled or heated  
sufficiently.  
Display of the remote con-  
troller does not appear (1,  
2). The remote control sig-  
nal cannot be received if  
the remote controller is  
not operated near the air  
conditioner (1).  
Check the following.  
d
Check the following.  
Is the breaker turned  
on?  
1
Is the temperature set-  
ting correct?  
1
d
Check the following.  
Arent the batteries ex-  
hausted?  
1
Isnt the fuse blown?  
2
3
Isnt the filter dirty?  
2
3
Isnt the ON-timer set?  
Is the polarity (+, -) of the  
batteries correct?  
2
Isnt the outlet of the out-  
door unit blocked?  
When a power failure occurs.  
d
Check the following after  
the restoration of the power.  
If the air conditioner had operated be-  
fore the power failure, as these mod-  
els are equipped with an auto restart  
function, the air conditioner should  
start operating again. (Refer to De-  
scription of AUTO RESTART FUNC-  
TIONon page 7.)  
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.  
Does the air conditioner  
1
start operating again?  
In the following cases, stop operation and consult your dealer.  
I The remote control signal may  
not be received in a room where  
an electronic ON/OFF type fluo-  
rescent lamp (inverter-type fluo-  
rescent lamp, etc.) is used.  
I In the region where the electric  
wave is weak, when the air con-  
ditioner is operated, noise may  
be generated in radio reception.  
I When thunder is heard, stop op-  
eration and turn off the breaker.  
Otherwise, the electrical parts  
may be damaged.  
WHEN YOU THINK THAT TROUB  
Question  
Answer (not a malfunction)  
The air conditioner  
cannot be operated  
for about 3 minutes  
when restarted.  
I This protects the air conditioner according to instruc-  
tions from the microprocessor. Please wait.  
Cracking sound is  
heard.  
I This sound is generated by the expansion/contraction  
of the front panel, etc. due to change in temperature.  
I The air conditioner sucks in an odor adhering to the  
wall, carpet, furniture, cloth, etc. and blows it out with  
the air.  
The room smells  
strange.  
I In DRY operation, the unit operates using the same  
refrigerant circuit as in COOL operation. DRY opera-  
tion time has to be reduced in order to lower humidity  
without much room temperature decreasing. So the  
compressor sometimes stops, and at the same time  
the indoor fan stops. This prevents water condensed  
on the heat exchanger from evaporating again.  
The fan stops  
during the DRY  
operation.  
I This is the sound of refrigerant flowing inside the air  
conditioner.  
I This is the sound of condensed water flowing in the  
heat exchanger.  
The sound of water  
flowing is heard.  
I This is the sound of the heat exchanger defrosting.  
I 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.  
The sound as  
burbling is heard.  
I When a ventilation fan or a gas cooker is used in a  
room, the cooling load increases, resulting in an in-  
sufficient cooling effect.  
I When the outside air temperature is high, the cooling  
effect may not be sufficient.  
The room cannot be  
cooled sufficiently.  
BLE HAS OCCURRED  
Question  
Answer (not a malfunction)  
Mechanical sound is  
heard from the  
indoor unit.  
I This is the switching sound in turning on/off the fan or  
the compressor.  
I 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.  
I In the heating operation, if the air flow temperature is  
too low or when defrosting is being done, the horizon-  
tal vane position is automatically set to horizontal.  
The air flow  
direction changes  
during operation.  
I During COOL and DRY operations, pipe or pipe con-  
necting sections are cooled and this causes water to  
condense.  
I In the heating operation, the defrosting operation makes  
water frozen on the outdoor unit melt and drip down.  
I In the heating operation, water condensed on the heat  
exchanger drips down.  
Water leaks from the  
outdoor unit.  
Air does not blow  
out soon in the  
heating operation.  
I Please wait as the air conditioner is preparing to blow  
out warm air.  
I Defrosting of the outdoor unit is being done (Defrost-  
ing operation).  
Since this is completed in 10 minutes, please wait.  
(When the external temperature is too low and humid-  
ity is too high, frost is formed.)  
The operation is  
stopped for about  
10 minutes in the  
heating operation.  
I This is the sound when the flow of refrigerant inside  
the air conditioner is switched.  
Hissing sound is  
sometimes heard.  
I These models are equipped with an auto restart func-  
tion. When the main power is turned off without stop-  
ping the air conditioner with the remote controller and  
is turned on again, the air conditioner will start opera-  
tion automatically in the same mode as the one set  
with the remote controller just before the shutoff of  
the main power.  
The air conditioner  
starts the operation  
only with the main  
power turned on,  
though you do not op-  
erate the unit with the  
remote controller.  
13  
INSTALLATION, RELOCATION A  
Installation place  
Avoid installing the air conditioner in the following  
places.  
I Where flammable gas could leak.  
Keep the outdoor unit 9.8 ft. or  
more away from the antennas  
of TV sets or radios.  
CAUTION  
Inverter-type  
fluorescent lamp  
To prevent the effects  
of a fluorescent lamp,  
keep as far apart as  
possible.  
Do not install the unit where flammable gas could  
wall, etc.  
leak.  
Well-  
ventilated  
dry place  
If gas leaks and collects around the unit, it may cause  
an explosion.  
Keep a space  
to prevent the  
picture  
distortion or  
the noise.  
4 in. or  
more  
20 in. or  
more  
3.3 ft.  
or more  
TV  
I Where there is much machine oil.  
I Salty places such as the seaside.  
I Where sulfide gas is generated such as a hot spring.  
I Where oil is splashed or where the area is filled with  
oily smoke.  
9.8 ft.  
or more  
Radio  
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 sub-  
stances will be generated.  
Electrical work  
I Provide an exclusive circuit for the power supply of the air conditioner.  
I Be sure to observe the breaker capacity.  
I 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  
I 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.  
I The unit should be installed by licensed contractor according to local code requirements.  
CAUTION  
I Ground the unit.  
Do not connect the ground to a gas pipe, water pipe, lightning rod or the ground of a telephone. If the ground-  
ing is incorrect, it may cause an electric shock.  
I 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.  
14  
AND INSPECTION  
Inspection and maintenance  
I When the air conditioner is used for several seasons, the capacity may be lowered due to dirt inside the unit.  
I Depending on the condition, an odor may be generated or dehumidified water may not drain out smoothly due to  
dirt, dust, etc.  
I It is recommended that the unit be inspected and maintained (charged) by specialist in addition to normal main-  
tenance. Consult your dealer.  
Operating sound considerations  
I 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.  
I If an abnormal sound is heard during operation, consult your dealer.  
Relocation  
I 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.  
NOTE  
3400 Lawrenceville Suwanee Road  
Suwanee, Georgia 30024  
Toll Free: 800-433-4822 Toll Free Fax: 800-889-9904  
Specifications are subject to change without notice.  

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