ADVANCED AND EVER ADVANCING
MITSUBISHI ELECTRIC
MITSUBISHI
ELECTRIC
SPLIT-TYPE AIR CONDITIONERS
OPERATING INSTRUCTIONS
MS09TW
MS12TN
MS15TN
MS17TN
For customers
Thank you very much for purchasing this Mitsubishi room air conditioner.
• To use this unit correctly and safely, be sure to read this operating instructions before use. Keep this manual carefully for
later reference.
• Be sure to receive a guarantee card from your dealer and check that the purchased data and shop name, etc. are
entered correctly.
• This air conditioner should not be installed by the customer. (Safety and performance functions cannot be assured.)
CONTENTS
SAFETY PRECAUTIONS 2
NAME OF EACH PART 4
PREPARATION BEFORE OPERATION 6
I FEEL... AUTO OPERATION 7
MANUAL OPERATION (COOL,DRY,FAN) 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/DEODORIZING FILTER (OPTION) .... 11
REPLACEMENT OF THE DEODORIZING FILTER (OPTION)/
AIR CLEANING FILTER (OPTION) 12
BEFORE CONTACTING THE SERVICEMAN,
CHECK THE FOLLOWING AGAIN 12
WHEN YOU THINK THAT TROUBLE HAS OCCURRED 13
INSTALLATION, RELOCATION AND INSPECTION 14
Downloaded from www.ManualsFile.com manuals search engine
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.
Meanings of symbols used in this manual are as shown below.
• After reading this manual, keep it together with the installation manual in a handy place for easy
reference.
• This air conditioner is NOT intended for use by children or infirm persons without supervisions.
2
Downloaded from www.ManualsFile.com manuals search engine
• Consult your dealer for installation of the air conditioner.
• Do not connect the ground to a gas pipe,
water pipe, lightning rod or the ground of
a telephone. If the grounding is incorrect,
it may cause an electric shock.
• If gas leak and collect around the unit, it may cause
an explosion.
• If the drainage route is incomplete, water may drop
from the unit. This may wet and damage the furni-
ture.
4
Downloaded from www.ManualsFile.com manuals search engine
These models are equipped with an auto restart function. If you do not want to use
this function, please consult the service representative because the setting of the
unit needs to be changed.
— Auto restart function is ...
When the Indoor unit is controlled with the remote controller, the operation mode, the set temperature and
the fan speed are stored in the memory. If a power failure occurs or the main power is turned off during
operation, "Auto restart function" sets automatically to start operating in the same mode as the one set with
the remote controller just before the shut off of the main power. (Refer to page 7 for details.)
Turn the breaker on.
Remove the front lid and insert bat-
teries. Then reattach the front lid.
Insert the minus pole of the batteries first.
Check if the polarity of the batteries is correct.
Press the CLOCK set button.
Press the RESET button.
• If the RESET button is not pressed, the remote control-
ler may not operate correctly.
Handling of the remote controller
• The range that the signal can reach is about 20 feet
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 installing on a wall, etc.
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).
• 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.
• 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.
• Replace the 2 batteries with new ones of the same
type.
• 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.
• Dispose of exhausted batteries in the correct man-
ner.
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.
* When the EMERGENCY OPERATION switch
is pressed, the unit will operate in test run for
30 minutes at first and then the operation mode
shifts to EMERGENCY COOL MODE.
Details of EMERGENCY COOL MODE are as shown
below. However, the temperature control does not work
for 30 minutes in test run and the unit is set to continu-
ous operation. The fan speed is set to Hi in test run
and shifts to Medium after 30 minutes.
The operation mode is indicated by the Operation Indi-
cator lamp on the indoor unit as following figures.
Operation Indicator lamp
MS09TW
MS12/15/17TN
To stop the EMERGENCY COOL
MODE, press the EMERGENCY OP-
ERATION switch again.
* Each time the switch is pressed, the opera-
tion mode alternates between the EMER-
GENCY COOL MODE and STOP MODE.
6
Downloaded from www.ManualsFile.com manuals search engine
Details of auto operation
Room temperature
when started
About 77 °F or higher
About 77 °F or lower
Operation mode
COOL
DRY
Target temperature
(initial state)
About 75 °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.
Details of display on the indoor unit
The operation indicator at the right side of the indoor unit indicates the operation state.
MS09TW MS12/15/17TN
Operation indicator lamp
The following indication does not depend on the shape of lamp.
— Description of "AUTO RESTART FUNCTION"
• These units are equipped with an auto restart function. When the main power is turned on, the air conditioner will start
operation automatically in the same mode as the one set with the remote controller before the shutoff of the main power.
• If the unit was set to off with the remote controller before the shutoff of the main power, it will remain stopped even after
the main power is turned on.
• If the unit was in the emergency operation before the shutoff of the main power, it will start operation, when main power
comes on, in the same mode as the one set with the remote controller before the emergency operation.
• If the unit is operated in "I FEEL..." mode before power failure, the operation is not stored in the memory. In "I FEEL..."
mode, the operation is decided by the initial room temperature at (re)start.
• 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.
Downloaded from www.ManualsFile.com manuals search engine
Do not open the front panel up past the level position in order to prevent it from being damaged.
When the unit is to be cleaned, switch
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 and
detergent. And do not spray with insecticide. The
unit may be damaged.
11
Downloaded from www.ManualsFile.com manuals search engine
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)
Remove the air filter.
Remove the deodorizing filter (gray sponge
type).
Deodorizing filter
Install a new deodorizing filter.
Install the air filter and securely close the
front panel.
Deodorizing filter
• Cleaning is necessary about once every 2 weeks.
However, if dirt is conspicuous, clean more often.
• When the color of 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.
• Standard interval for filter replacement is about 1
year.
Air cleaning filter replacement
(about once every 4 months)
Remove the air filter.
Air filter ;/ %
Remove the air cleaning filter (white bel-
lows type).
Air cleaning filter
Install a new air cleaning filter.
K| Install the air filter and securely close the
"• front panel.
Air cleaning filter
• If the air cleaning filter is clogged, it may lower the
unit's capacity or cause condensation at the air out-
let.
• The air cleaning filter is disposable. The standard us-
able interval is about 4 months. However, if the color
of the filter turns to dark brown, replace the filter at
once.
Optional parts Optional parts are available from your local dealer.
The air conditioner
cannot be operated.
Check the following.
The breaker is turned
on and fuse is not
blown.
The ON-timer is not
set.
Cannot be cooled
sufficiently.
Check the following.
The temperature
setting is correct.
Air filter is not dirty.
Outlet of the outdoor
unit is not blocked.
Display of the remote controller
does not appear.
The remote control signal
cannot be received if it is not
near tne air conditioner.
The batteries are
exhausted.
The polarity (+, -) of the
batteries is confused.
If the air conditioner had operated
before the power failure, as these
models are equipped with the auto
restart function, the air conditioner
should start operating again. (Refer
to Description of "AUTO RESTART
FUNCTION" on page 7.)
Does the air conditioner
start operating again?
Even if the above items are checked, when the air conditioner does not recover from the
trouble, stop using the air conditioner and consult your dealer.
In the following cases, stop operation and consult your dealer.
I The remote control signal may
not be received in a room with
an electronic ON/OFF type
fluorescent lamp (inverter type
fluorescent lamp, etc.) is used.
I In a weak radio wave area,
when the air conditioner is
operated, noise may be
generated in radio reception.
I When thunder is heard, stop
operation and turn off the breaker.
Otherwise, the electrical parts
may be damaged.
12
Downloaded from www.ManualsFile.com manuals search engine
