FOR USER
ON/OFF ???
E OPERATION MANUAL
For safe and correct use, please read this operation manual thoroughly before operating the
FOR USER
ON/OFF ???
E OPERATION MANUAL
For safe and correct use, please read this operation manual thoroughly before operating the
sSince this unit contains rotating parts and parts which could cause an electric shock,be sure to read all of the ???Safety Precautions??? before operating the unit.
s???Safety Precautions???lists important points about safety. Please be sure to follow them.
Symbols used in the text
Warning:
Describes precautions that should be observed to avoid the risk of injury or death to the user.
Caution:
Describes precautions that should be observed to prevent damage to the unit.
Symbols used in the illustrations
: Indicates an action that must be avoided.
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: Indicates that caution should be taken with rotating parts. (This sym- bol is displayed on the main unit label.) <Color: Yellow>
: Indicates the main switch. (This symbol is displayed on the main unit label.) <Color: Blue>
Warning:
Carefully read the labels affixed to the main unit.
1.1. Installation
Warning:
???The unit should not be installed by the user. Ask the dealer or an authorized company to install the unit. If the unit is installed im- properly, water leakage, electric shock or fire may result.
???Use only accessories authorized by Mitsubishi Electric and ask your dealer or an authorized company to install them. If accesso- ries are installed improperly, water leakage, electric shock or fire may result.
???The Installation Manual details the suggested installation method. Any structural alteration necessary for installation must comply with local building code requirements.
???Never repair the unit or transfer it to another site by yourself. If repair is performed improperly, water leakage, electric shock or fire may result. If you need to have the unit repaired or moved, consult your dealer.
2
E 1. Safety Precautions
1.1. Installation
1) Outdoor unit
Warning:
???The outdoor unit must be installed on a stable, level surface, in a place where there is no accumulation of snow, leaves or rubbish.
???Do not stand on, or place any items on the unit. You may fall down or the item may fall, causing injury.
Caution:
The outdoor unit should be installed in a location where air and noise emitted by the unit will not disturb the neighbours.
2) Indoor unit
Warning:
The indoor unit should be securely installed. If the unit is loosely mounted, it may fall, causing injury.
1.1. Installation
3) Remote controller
Warning:
The remote controller should be installed in such a way that children cannot play with it.
4) Drain hose
Caution:
Make sure that the drain hose is installed so that drainage can go ahead smoothly. Incorrect installation may result in water leakage, causing damage to furniture.
3
MITSUBISHI
CENTRALLY CONTROLLED
??C
ON/OFF ???
1.1. Installation
5) Power line, fuse or circuit breaker
Warning:
???Make sure that the unit is powered by a dedicated line. Other ap- pliances connected to the same line could cause an overload.
???Make sure that there is a main power switch.
???Be sure to adhere to the unit???s voltage and fuse or circuit breaker
1.2. During operation
Caution:
???Do not use any sharp object to push the buttons, as this may damage the remote controller.
???Do not twist or tug on the remote controller cord as this may dam-
age the remote controller and cause malfunction.
??? Never block or cover the indoor or outdoor unit???s intakes or out- lets. Tall items of furniture underneath the indoor unit, or bulky items such as large boxes placed close to the outdoor unit will reduce the unit???s efficiency.
Warning:
???Do not splash water over the unit and do not touch the unit with wet hands. An electric shock may result.
???Do not spray combustible gas close to the unit. Fire may result.
???Do not place a gas heater or any other
combustion may result.
4
E 1. Safety Precautions
1.2. During operation
Warning:
???Do not remove the front panel or the fan guard from the outdoor unit when it is running. You could be injured if you touch rotat- ing, hot or
???Never insert fingers, sticks etc. into the intakes or outlets, other- wise injury may result, since the fan inside the unit rotates at high speed. Exercise particular care when children are present.
???If you detect odd smells, stop using the unit, turn off the power switch and consult your dealer. Otherwise, a breakdown, electric shock or fire may result.
???Do not
???Do not leave handicapped people or infants sitting or standing in the path of the airflow from the
Caution:
???Do not direct the airflow at plants or caged pets.
???Ventilate the room frequently. If the unit is operated continuously in a closed room for a long period of time, the air will become stale.
1.3. Disposing of the unit
Warning:
When you need to dispose of the unit, consult your dealer. If pipes are removed incorrectly, refrigerant (fluorocarbon gas) may blow out and come into contact with your skin, causing injury. Releasing re- frigerant into the atmosphere also damages the environment.
5
E
E
2.Introduction
3.Components
A
ON/OFF ???
E
F
D
C
B
A
ON/OFF ???
This
The automatic cooling/heating mode allows setting of an optimum room temperature to which the air conditioner automatically adjust the room temperature.
sAfter you have read this manual, keep it and the Installation Manual in a safe place for easy reference whenever a question arises. If the unit is going to be operated by another person, make sure that this manual is given to him or her.
A Indoor unit
B Remote controller
3.1. Indoor unit and remote controller
The indoor unit is mounted into the ceiling of your room and puts out air
(cool, warm or dry) according to the settings you make using the remote controller mounted on the wall.
A Air intake: Draws air in a room.
BHorizontal air outlet: To be automatically set in the horizontal blowing posi- tion in either COOL or DRY mode operation.
C Downward air outlet
DAutomated vane: Helps circulate air upward and downward or adjusts air- flow direction.
E Air filter
F Decorative panel
G Remote controller
6
E
E
3.Components
4.Operation
A
B
A
B
ON/OFF ???
3.2. Outdoor unit
The outdoor unit takes in and feeds outside air to the indoor unit and exhausts heated air in the cooling or dehumidifying mode, or cool air in the heating mode.
A Air outlet
B Air intake
4.1. Operation modes
Cooling 
The air conditioner works to cool the room to the selected temperature.
The fan blows air continuously at the selected speed.
Drying (dehumidifying) 
: Disabled in the heat- ing mode
The drying mode efficiently reduces the humidity in the room so that the room temperature is not lowered excessively. When the selected room temperature is reached in the Low setting, the airflow will stop for ten minutes and then will resume for three minutes to keep the humidity low.
Heating 
???The air conditioner works to heat the room to the selected tempera- ture.
???When selecting the heating mode, a desired room temperature must be set to avoid any cool air. The fan will gradually increase the airflow delivery up to a selected rate.
???When the room temperature reaches the selected temperature and the compressor stops, the fan will deliver a gentle airflow.
Automatic (cooling / heating) 
The air conditioner automatically goes into the cooling or heating mode to keep the room at the selected temperature.
7
8
E 4. Operation
9
10
E 4. Operation
4.8. Using the timer CLOCK
ON 
OFF
11
CHECK MODE
4.8. Using the timer CLOCK
ON 
OFF
2) Set the time to start the unit as follows
ON
1 Press 
ON 
OFF button to display B 
.
2Press TIMER SET button to set the time that you want the unit to start. The start time is displayed at A.
3) Set the time to stop the unit as follows
OFF
1 Press 
ON 
OFF button to display C 
.
2Press TIMER SET button to set the time that you want the unit to stop. The stop time is displayed at A.
4) Changing the set times
???When change is made to either one of a pair, e.g., AUTO START or
AUTO STOP, set the time you need not to change to 
. This display is available following 23:50.
4.8. Using the timer CLOCK
ON 
OFF
5) AUTO START and AUTO STOP operation
1Press CLOCK ON 
OFF button to make the following checks.
Check that the current time is correct.
Check that the automatic start time is correct. Check that the automatic shutdown time is correct.
???For selection or changing of time, see the previous page (page 11).
???The next operation time is displayed after approximately 10 seconds.
???Each time you press 
button, available options change as follows with relative displays on the remote controller.
Remote controller display ??? ??? A
Available setting???
12
E 4. Operation
CHECK MODE
A
4.8. Using the timer CLOCK
ON 
OFF
6) AUTO START Operation
1Press CLOCK ON 
OFF button to make the following checks.
Check that the current time is correct.
Check that the automatic start time is correct.
Check that the automatic shutdown time is identical to the dis- play A 
.
???For the selection of the time, see the previous page (page 11).
7) AUTO STOP Operation
1Press CLOCK ON 
OFF button to make the following checks.
Check that the current time is correct.
Check that the automatic shutdown time is correct.
Check that the automatic start time is identical to the display A
.
???For the selection of the time, see the previous page (page 11).
4.9. Selecting a fan speed 
1 Press 
button to select a desired fan speed.
???Each time you press the button, available options change with the display A on the remote controller, as shown below.
Display
Available
Low - High
Option (Fan Speed Switch)
???In the drying mode 
, the selection of the fan speed is disabled.
???In the heating mode 
, the indoor fan continues running for approxi- mately one minute to discharge any residual heat from the electric
heater; even after the operation has shut down.
13
A B C D E
CHECK MODE
30??
A
B
C
70??
4.10. Adjusting vertical airflow direction 
The vertical air vane helps select the vertical direction of the airflow.
1 Press 
button to select the vertical airflow direction.
???Each time you press the button, the option changes are displayed on the remote controller, as shown below.
???A Swing
???
B Horizontal airflow 30??
???
C Downward airflow at an angle of 45??
???
D Downward airflow at an angle of 55??
???
E Downward airflow at an angle of 70??
???Immediately after the
In the cooling/drying modes: Horizontal airflow
???When you have selected gentle or cooling mode, or you have entered
the drying mode,the available options change in the following order :
A???B???D???E???A
???One hour after you have selected D or E, the airflow automatically changes to A and the display F ???1HR??? appears.
???Do not use D or E too often with the Low airflow option in the cooling and drying modes or condensation can occur.
4.11. Vertical airflow adjustment
Setting this to ???Swing??? moves the automated vane back and forth within the swing range, so that the air is directed upwards and downwards.
In the SWING mode, the remote controller displays a moving arrow as shown in the diagram to indicate the swinging automated vane.
The arrow motion on the remote controller display and the actual auto- mated vane movement do not match with each other.
In the COOL or FAN mode operation, the vane is set in the ???fluctuating??? mode, varying airflow rate automatically.
When you set OFF the LOUVER switch, the automated vane will return to the position before the SWING mode has been selected.
When you toggle the MODE SELECT buttons between COOL, DRY and FAN with the LOUVER switch set OFF, the airflow is set to approx. 30
A Horizontal air outlet
B Downward air outlet
C Swing range <30 degrees to 70 degrees>
14
E
E
5.Tips for best results
6.Care and
AB
C
D
???
B
C
A1
D
2
Keep the filters clean
Dirty or clogged filters reduce the flow of air, making the unit less efficient.
Very dirty filters may even cause damage to the unit. Remove and clean the filters at least once a week (more often, in very dusty locations). Using a vacuum cleaner is an ideal way to clean the filters.
Let fresh air into the room from time to time
Open the windows and ventilate the room now and then, otherwise the room will become musty.
Eliminate heat sources
When cooling the room, draw the curtains to keep out direct sunlight. Keep doors and windows fully closed, and avoid opening doors more often than necessary.
Do not
The
In COOL mode, for every 1??C you increase the desired temperature set- ting, you will save about 10% on electricity costs.
Caution:
???Always turn off the power, first on the remote controller and then the main switch, before cleaning or servicing the unit.
???When installing or removing the filter or front panel, do not stand on an unsteady surface. You may fall and injure yourself. Be also careful not to let dust fall into your eyes.
6.1. Cleaning the filters and the indoor unit
Dirty or clogged filters block the airflow and reduce efficiency. Very dirty
filters can damage the
Filter removal
???
1Pull the knob on the intake grille in the direction indicated by the arrow and it should open.
2 Open the intake grille.
3Release the knob on the center edge of the intake grille and pull the filter forward to remove the filter.
A Knob
B Grille
C Intake grille D Filter
???
1Pressing the PUSH button on the outer side of the intake grille causes the intake grille to open automatically.
2A filter with an intake grille on it can be removed by pulling the filter forward.
A Knob B Grille
C Intake grille D Filter
15
CHECK MODE
6.1. Cleaning the filters and the indoor unit
Cleaning the filters
???Clean the filters using a vacuum cleaner. If you do not have a vacuum cleaner, tap the filters against a solid object to knock off dirt and dust.
???If the filters are especially dirty, wash them in lukewarm water. Take care to rinse off any detergent thoroughly and allow the filters to dry completely before putting them back into the unit.
Caution:
???Do not dry the filters in direct sunlight or by using a heat source, such as an electric heater: this may warp them.
???Do not wash the filters in hot water (above 50??C), as this may warp them.
???Make sure that the air filters are always installed. Operating the unit without air filters can cause malfunction.
Cleaning the indoor unit
???Wipe the outside of the unit with a clean, dry, soft cloth.
???Clean off any oil stains or finger marks using a neutral household de- tergent (such as dishwashing liquid or laundry detergent).
Caution:
Never use gasoline, benzene, thinner, scouring powder or any type of
6.2. Care and cleaning
Clean the filter
When the A???FILTER??? indicator blinks on the remote controller to alert you to the necessity of cleaning of the filter.
???As a guideline for typical office environment, the
Reset the FILTER indicator
1 Press the FILTER button twice after cleaning.
sWhen you press the FILTER button twice, the ???FILTER??? indicator A will be turned off and reset.
sThe FILTER indicator provides you with a guideline for the neces- sity of filter cleaning based on total operating hours in typical indoor air conditions. Depending on different operating environ- ments, more or less frequent cleaning may be necessary.
16
E 6. Care and cleaning
6.3.
sPress POWER ON/OFF to turn the unit off.
sTurn off the main power switch.
sClean the filters and the indoor unit thoroughly.
sClean the outdoor unit and place a protective cover over it to keep out dirt and rubbish.
6.4.
sRemove the protective cover from the outdoor unit.
sCheck that the outdoor unit is properly installed.
sCheck that the outdoor unit???s ground wire is properly attached.
sCheck that the intakes and outlets on both the indoor and out- door units are free of any obstruction.
sCheck that the drain hose is not blocked, that there are no kinks in it, and that it is correctly installed.
sCheck that the filters are installed in the indoor unit. Operating the
Caution:
The first time you use the
17
NOTE: After a power cut, the unit will not restart automatically. You will have to restart it by pressing the POWER - ON/OFF button on the remote controller.
If none of the above apply, turn the main switch off and contact the dealer from whom you bought the
nature of the problem. Do not try to fix the unit yourself.
In any of the following cases, turn off the main power switch and contact your local dealer for service:
??????CHECK??? followed by ???P1???, ???P2???, ???P3???, ???P4???, ???P5???, ???P7??? or ???CENTRALLY CONTROLLED??? is displayed on the control panel.
???The switches do not work properly.
???The circuit breaker trips frequently (or the fuse blows frequently).
???Water has accidentally been splashed into the unit.
???Water leaks from the unit.
???Something is accidentally dropped into the
???An unusual noise is heard during operation.
The following do not indicate any malfunction:
Odours: smells such as tobacco or cosmetic odours may persist after they have been sucked into the unit.
Sound of liquid flowing inside indoor unit: this can occur during or after operation and is simply the sound of refrigerant being circulated inside the unit.
Ticking sound coming from indoor unit: this can occur when cooling or heating has just begun or has just stopped. It is caused by the indoor unit shrinking or expanding slightly due to the change in temperature.
The message ???CENTRALLY CONTROLLED??? appearing on the LCD panel: from time to time, this message may come up on the LCD panel. This does not indicate any malfunction.
Warning:
If the air conditioner operates but does not cool or heat (depending on model) the room, consult your dealer since there may be a refrigerant leak. Be sure to ask the service representative whether there is refrigerant leakage or not when repairs are carried out.
The refrigerant charged in the air conditioner is safe. Refrigerant normally does not leak, however, if refrigerant gas leaks indoors, and comes into contact with the fire of a fan heater, space heater, stove, etc., harmful substances will be generated.
18
Item
Model
W
BTU/h
kW
W
BTU/h
kW
CMM
dB (A)
kW
kW
mm
kg
mm
kg
CMM
kW
kW
W
mm
kg
dB (A)
Units should be installed by licensed electric contractor accordingly to local code requirement.
19
HEAD OFFICE: MITSUBISHI DENKI BLDG.,