Mitsubishi Electronics Msz A24yv User Manual

SPLIT-TYPE AIR CONDITIONERS  
OPERATING INSTRUCTIONS  
INDOOR UNIT  
MSZ-A18YV  
MSZ-A24YV  
MSZ-A26YV  
MSZ-A30YV  
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  
date and shop name, etc. are entered correctly.  
This air conditioner should not be installed by the customer. (Safety and perform-  
ance functions cannot be assured.)  
SAFETY PRECAUTIONS  
NAME OF EACH PART  
Indoor unit  
CAUTION  
Do not operate the unit at low outside temperature (less than -10°C) in the cooling mode.  
In the cooling mode, if the unit is operated at low outside temperature (less than -10°C), water con-  
densed in the air conditioner may drop and wet or damage furniture, etc.  
Air cleaning filter  
(White bellows type)  
Front panel  
Air inlet  
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.  
Power supply cord  
Do not put a stove, etc. where they are exposed to direct airflow.  
This may cause imperfect combustion.  
Catechin air filter  
When the unit is to be cleaned, switch it off and disconnect the power supply plug and/or turn off the  
breaker.  
Remote control  
receiving section  
Since the fan rotates at high speed during operation, this may cause an injury.  
Vertical vane  
When the unit is not going to be used for a long time, disconnect the power supply plug and/or turn  
off the breaker.  
Horizontal vane  
Otherwise, dirt may collect and this may cause a fire.  
Replace the 2 batteries with new ones of same type.  
Using an old battery together with a new one may result in heat generation, leakage or an explosion.  
If liquid from the batteries gets onto your skin or clothes, wash it well with clean water.  
Remote controller  
If liquid from the batteries gets into your eyes, wash them well with clean water and consult a doctor at  
once.  
Operation section  
Display section  
(When the front panel is opened)  
Ventilate well in using the unit with a stove, etc.  
An oxygen shortage may occur.  
Do not operate switches with wet hands.  
This may cause an electric shock.  
Do not clean the air conditioner with water.  
Water may enter the unit and degrade the insulation. This may cause an electric shock.  
Do not step or put anything on the indoor/outdoor unit.  
This may cause an injury, etc. if you or something falls down.  
Operation  
Indicator lamp  
Emergency operation switch  
Remote control  
receiving section  
For installation  
WARNING  
Consult your dealer for installation of the air conditioner.  
Outdoor unit  
CAUTION  
Do not install the unit where flammable gas could leak.  
Air inlet (back and side)  
If gas leaks and collects around the unit, it may cause an explosion.  
Earth the unit.  
Do not connect the earth to a gas pipe, water pipe, lightning rod or the earth of a telephone. If the  
earthing is incorrect, it may cause an electric shock.  
Piping  
Install an earth leakage breaker depending on the place where the air conditioner is to be installed  
(humid places, etc.).  
Drainage hose  
If the earth leakage breaker is not installed, it may cause an electric shock.  
Drain should be fully drained.  
If the drainage route is incomplete, water may drop from the unit. This may wet and damage the furniture.  
Air outlet  
Drain outlet  
3
NAME OF EACH PART  
PREPARATION BEFORE OPERATION  
Remote controller  
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.  
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Signal transmitting section  
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 6 for details.)  
˚C  
Operation display section  
CLOCK  
AMPM  
AMPM  
Indoor unit  
ON/OFF (operate/  
stop) button  
TOO  
WARM  
TOO  
ON/OFF  
COOL  
Insert the power supply plug into the power outlet and/or turn the breaker on.  
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Temperature buttons  
WARNING:  
Remove dirt from the power supply plug and insert the plug securely.  
If dirt adheres to the plug or insertion is incomplete, it may cause a fire or an electric shock.  
Open the front lid.  
(This diagram shows an overall view.)  
AMPM  
TOO  
TOO  
ON/OFF  
WARM  
COOL  
VANE button  
(Horizontal vane button)  
Fan speed control button  
Off-timer button  
FAN  
STOP  
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FEEL COOL  
VANE  
START  
HR.  
HEAT DRY  
On-timer button  
MODE WIDE VANE  
HR.button  
MIN.button  
(Time set buttons)  
Operation select button  
ECONO COOL button  
ECONO COOL  
LONG  
MIN.  
RESET CLOCK  
CLOCK set button  
LONG button  
WIDE VANE button  
(Vertical vane button)  
RESET button  
4
PREPARATION BEFORE OPERATION  
Handling of the remote controller  
Remote controller  
When the remote controller cannot be used (emergency operation)  
The range that the signal can reach is about 6 m when  
the remote controller is pointed at the front of the in-  
door unit.  
When a button is pressed, one or two beeps will be  
heard from the indoor unit. If no sound is heard, op-  
erate again.  
Use the remote controller carefully.  
If it is dropped, thrown or it gets wet, the remote con-  
troller may not operate.  
When the batteries of the remote controller run out or the remote controller malfunctions, the emergency operation  
can be done using the EMERGENCY OPERATION switch.  
How to set the batteries and the current  
time  
1 Press the EMERGENCY OPERATION switch.  
2 To stop the emergency operation, press the  
EMERGENCY OPERATION switch once (in  
case of EMERGENCY HEAT MODE) or twice  
(in case of EMERGENCY COOL MODE).  
1 Remove the front lid and insert batteries.  
Each time the EMERGENCY OPERATION switch is  
pressed, the unit will operate in order of EMER-  
GENCY COOL MODE, EMERGENCY HEAT MODE  
and STOP MODE.  
Then reattach the front lid.  
Insert the minus pole of the batteries first.  
Check if the polarity of the batteries is correct.  
However, when the EMERGENCY OPERATION  
switch is once pressed, the unit will operate in test  
run for 30 minutes and then the operation mode  
shifts to EMERGENCY MODE.  
When installing on a wall, etc.  
Install the remote controller holder in a position where  
the signal reception sound (beep) can be heard from  
ON/OFF  
the indoor unit when the  
button is pressed.  
Insert the minus pole  
of the batteries first.  
How to install/remove the remote controller  
Installing :Insert the remote controller downward.  
Removing :Pull it up.  
2 Press the RESET button.  
Press using a  
thin stick.  
Remote control-  
ler holder  
Details of EMERGENCY MODE are as shown be-  
low. 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 min-  
utes.  
Dry-cell batteries  
I Reference for replacing batteries  
Replace the batteries with new AAA alkaline batteries  
in the following cases:  
If the RESET button is not pressed, the remote con-  
troller may not operate correctly.  
· When the indoor unit does not respond to the remote  
control signal.  
· When the display on the remote controller becomes  
dim.  
· When a button of the remote controller is pressed, all  
displays appear on the screen, and then disappear  
immediately.  
Do not use manganese batteries. The remote controller  
could malfunction.  
3 Press the CLOCK set button.  
Operation mode  
Set temperature  
Fan speed  
COOL  
24°C  
HEAT  
24°C  
Press using a  
thin stick.  
Medium  
Auto  
Medium  
Auto  
Horizontal vane  
Vertical vane  
Front  
Front  
HR.  
MIN.  
4 Press the  
and  
buttons (TIME SET  
The operation mode is indicated by the Operation  
Indicator lamp on the indoor unit as following fig-  
ure.  
The service life of an alkaline battery is about 1 year.  
However, a battery whose time limit is approaching  
may be exhausted soon. The recommended usable  
time limit is indicated (month/year) on the bottom of  
the battery.  
To prevent liquid leakage, take out all batteries when  
the remote controller is not going to be used for a  
long time.  
buttons) to set the current time.  
FAN  
STOP  
START  
HR.  
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FEEL COOL  
Operation Indicator lamp  
VANE  
HEAT DRY  
EMERGENCY COOL EMERGENCY HEAT  
STOP  
MODE WIDE VANE  
ECONO COOL  
LONG  
MIN.  
Operation Indicator  
Operation Indicator  
Operation Indicator  
CAUTION:  
RESET CLOCK  
If liquid from the batteries gets onto your skin or  
clothes, wash it well with clean water.  
If liquid from the batteries gets into your eyes, wash  
them well with clean water and consult a doctor at  
once.  
HR.  
Each time the  
increases by 1 hour, and each time the  
is pressed, the set time increases by 1 minute.  
button is pressed, the set time  
MIN.  
button  
Do not use rechargeable batteries.  
Replace the 2 batteries with new ones of the same  
type.  
5 Press the CLOCK set button again and close  
the front lid.  
Dispose of exhausted batteries in the correct man-  
ner.  
5
I FEEL... AUTO OPERATION  
With the (I FEEL...)auto operation mode, the optimum room condition can be set automatically  
with a one-touch operation.  
Description of I FEEL...mode  
Details of operation  
To start operation:  
According to the room temperature when the operation starts, the operation 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 operation mode selected first is not changed even if the room temperature changes.  
If the operation mode does not match the room condition, select the appropriate operation mode by pressing the  
button.  
ON/OFF  
Press the  
button.  
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MODE  
CLOCK  
AMPM  
When the “  
(I FEEL...)mode is selected, the air conditioner is automatically  
controlled at the optimum temperature.  
Details of auto operation  
TOO  
TOO  
ON/OFF  
To stop operation:  
WARM  
COOL  
ON/OFF  
Room temperature  
when started  
Operation mode Target temperature  
(initial state)  
Press the  
button.  
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About 25°C or higher  
About 25°C - 23°C  
About 23°C or lower  
COOL  
DRY  
About 24°C  
FAN  
STOP  
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FEEL COOL  
VANE  
START  
HR.  
HEAT DRY  
HEAT  
About 26°C  
If you feel slightly warm:  
TOO  
MODE WIDE VANE  
WARM  
NOTE:  
Press the  
button to lower the temperature.  
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COOL: When the room temperature is 2°C 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 2°C of the set temperature and then change the set  
temperature.  
HEAT: When the room temperature is 2°C 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 2°C of the set temperature and then change the set  
temperature.  
ECONO COOL  
LONG  
MIN.  
One press lowers the temperature by about 1°C.  
RESET CLOCK  
If you feel slightly cool:  
TOO  
COOL  
Press the  
button to raise the temperature.  
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One press raises the temperature by about 1°C.  
MODE  
When “  
button until it is set.  
(I FEEL...)is not selected, press the  
FAN  
VANE  
STOP  
START  
HR.  
Details of display on the indoor unit  
I FEEL COOL  
The operation indicator at the right side of the indoor unit indicates the operation state.  
Lighted  
Each time the button is pressed, the operation mode is changed  
in sequence:  
(HEAT)  
HEAT  
DRY  
(I FEEL...)  
(COOL) (DRY) →  
Blinking  
Operation Indicator  
WIDE VANE  
LONG  
MODE  
Not lighted  
Operation indicator lamp  
ECONO COOL  
MIN.  
Difference between target  
temperature and room temperature  
Indication  
Operation state  
Description of AUTO RESTART FUNCTION”  
This shows that the air conditioner is operating to reach the  
target temperature. Please wait until the target temperature  
is obtained.  
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.  
About 2°C or more  
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.  
This shows that the room temperature is approaching the  
target temperature.  
About 2°C or less  
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...before power failure, the operation mode (COOL, DRY or HEAT) is not stored in the  
memory. When the main power is turned on, the unit decides the operation mode by the initial room temperature at  
restart and starts operation again.  
(In case of outdoor unit MXZ series only)  
Please refer to Information for multi system air conditioner.  
(Page 7)  
6
MANUAL OPERATION (COOL, DRY, HEAT)  
AIR FLOW VELOCITY AND DIRECTION ADJUSTMENT  
AIR FLOW velocity and direction can be selected as required.  
To select the COOL, DRY or HEAT/FAN mode:  
FAN  
To change the AIR FLOW velocity, press the  
button.  
ON/OFF  
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1 Press the  
button.  
Each time the button is pressed, the fan speed is changed in sequence:  
˚C  
(Low) →  
(Med.) →  
(High) →  
(AUTO)  
CLOCK  
MODE  
AMPM  
2 Select the operation mode by pressing the  
button.  
Use the  
(High) notch to cool/heat the room more.  
Each time this button is pressed, the operation mode is changed in sequence:  
CLOCK  
If the operating sound of the air conditioner disturbs your sleep, use the  
(Low) notch.  
AMPM  
(I FEEL...) →  
(COOL) (DRY) →  
(HEAT)  
TOO  
TOO  
ON/OFF  
WARM  
COOL  
To stop operation:  
To change the AIR FLOW blowing direction vertically, press the  
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TOO  
TOO  
VANE  
ON/OFF  
ON/OFF  
WARM  
COOL  
button.  
Press the  
button.  
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Each time the button is pressed, the angle of the horizontal vane is changed in  
FAN  
STOP  
After the operation mode is set once, the operation starts in the same mode as  
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FEEL COOL  
sequence:  
(1) →  
(2) →  
(3) →  
(4) →  
(5)(SWING)→  
(AUTO)  
ON/OFF  
the one set previously from the next time by simply pressing the  
button.  
VANE  
START  
HR.  
HEAT DRY  
FAN  
STOP  
SWING OPERATION  
Use the swing operation for the air flow to reach all corners of the room.  
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FEEL COOL  
MODE WIDE VANE  
VANE  
START  
HR.  
HEAT DRY  
ECONO COOL  
LONG  
MIN.  
Recommended horizontal vane range  
MODE WIDE VANE  
1
2
Use the  
(AUTO) position usually.  
(1) or (2) in the COOL or DRY mode  
(3) to (5) in the HEAT mode  
when adjusting to your requirements.  
COOL  
DRY  
RESET CLOCK  
ECONO COOL  
LONG  
MIN.  
Use position  
3
and use positions  
RESET CLOCK  
4
HEAT  
5
When the set temperature is to be changed:  
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I
TOO  
WARM  
Press the  
button to lower the temperature. One press lowers the temperature by about 1°C.  
NOTE:  
In the cooling operation, when the air conditioner is operated with setting the horizontal vane to  
1 hour, the AIR FLOW direction is automatically set to horizontal to prevent condensed water from dropping.  
Adjust the vertical AIR FLOW direction using the remote controller. If the horizontal vane is moved manually, it may  
cause trouble.  
TOO  
COOL  
(4) or  
(5) for  
Press the  
button to raise the temperature. One press raises the temperature by about 1°C.  
In HEAT operation  
If the air conditioner absorbs too much heat from the air, it may be overloaded. Following a judgement made by the  
microprocessor, the fan in the outdoor unit is automatically stopped to protect the air conditioner.  
When the outdoor units fan is stopped, frost may form on the outdoor unit, but this is not a problem.  
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).  
Auto air flow direction control operation  
In DRY operation  
VANE  
When the AUTO mode is selected with the  
correspond to the operation mode for effective operation.  
(1) HEAT:  
button, the position of the horizontal vane is automatically set to  
The temperature control (temperature setting) cannot be done.  
The room temperature is slightly lowered in this operation mode.  
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.  
The details of the display on the indoor unit are explained on page 6.  
(2) COOL, DRY: The air is blown out horizontally.  
NOTE:  
When the ambient temperature is too high, the room temperature may not reach the set temperature since the unit  
operates to cool the room under a high load.  
WIDE VANE  
To change the AIR FLOW blowing direction horizontally, press the  
button.  
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Each time the button is pressed, the angle of the VERTICAL VANE is changed in sequence:  
Information for multi system air conditioner (Outdoor unit: MXZ series)  
(SWING) →  
Multi system air conditioner (Outdoor unit: MXZ series) can connect two or more indoor units with one outdoor  
unit. According to the capacity, two or more units can operate simultaneously.  
SWING OPERATION  
Use the swing operation for the air flow to reach all corners of the room.  
When you try to operate two or more indoor units with one outdoor unit simultaneously, one for the cooling and the other  
for heating, the operation mode of the indoor unit that operates earlier is selected. The other indoor units that will start the  
operation later cannot operate, indicating an operation state. (Refer to the table of Operation Indicator lamp on page 6.)  
In this case, please set all the indoor units to the same operation mode.  
NOTE:  
Horizontal AIR FLOW blowing range  
Adjust the horizontal AIR FLOW direction using the re-  
mote controller. If the VERTICAL VANE is moved manu-  
ally, it may cause trouble.  
When indoor unit starts the operation while the defrosting of outdoor unit is being done, it takes a few minutes (max. 10  
minutes) to blow out the warm air.  
In the heating operation, the indoor unit that does not operate may get warm or the sound of refrigerant flowing may be  
COOL/DRY  
heard. This is not a malfunction since the refrigerant continuously flows into the indoor unit that does not operate.  
About 100°  
Description of AUTO RESTART FUNCTION”  
HEAT  
Refer to page 6.  
About 150°  
7
LONG OPERATION  
ECONO COOL OPERATION  
Use this operation when you want the air flow to reach a long distance.  
Use this operation when you want to be comfortable in COOL mode even with energy saved.  
Perform the following operations while the unit is operat-  
ing.  
Perform the following operations while the unit is operat-  
ing in the MANUAL COOL mode.  
ECONO COOL  
LONG  
˚C  
˚C  
Press the  
button.  
Press the  
button.  
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CLOCK  
CLOCK  
AMPM  
AMPM  
The fan speed increases.  
When the  
(ECONO COOL) operation is selected in COOL mode, the air  
When the fan speed is set to  
speed determined by the room temperature and the set temperature.  
In addition, the HORIZONTAL VANE moves to the position for LONG mode.  
(AUTO), the fan speed is higher than a fan  
conditioner performs swing operation in various cycle according to the tem-  
perature of air conditioner.  
Also SET TEMPERATURE is automatically set 2°C higher than in COOL mode.  
TOO  
TOO  
TOO  
TOO  
ON/OFF  
ON/OFF  
WARM  
COOL  
WARM  
COOL  
Mechanism of the LONG operation  
To release the ECONO COOL operation:  
ECONO COOL  
In the following example, the VERTICAL VANE is set to  
(front).  
FAN  
STOP  
FAN  
STOP  
Press the  
button again.  
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FEEL COOL  
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FEEL COOL  
VANE  
START  
HR.  
VANE  
START  
HR.  
COOL/DRY  
HEAT  
HEAT DRY  
HEAT DRY  
VANE  
LONG  
When the  
button or the  
button is pressed or the operation mode  
MODE WIDE VANE  
MODE WIDE VANE  
is changed during the ECONO COOL operation, ECONO COOL operation  
is released.  
ECONO COOL  
LONG  
MIN.  
ECONO COOL  
LONG  
MIN.  
TOO  
TOO  
WARM  
COOL  
FAN  
RESET CLOCK  
RESET CLOCK  
The  
button, the  
or  
button and ON/OFF timer (explained below)  
are available.  
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 2°C higher, it is possible to perform cooling operation with keeping comfort.As a result, energy can be saved.  
Fan speed: Higher  
Solid arrow: When the LONG mode is used  
Dotted arrow: When the LONG mode is not used  
TIMER OPERATION (ON/OFF TIMER)  
It is convenient to set the timer when you go to bed, when you get home, when you get up, etc.  
To release the LONG mode:  
How to set the ON timer  
How to set the OFF timer  
LONG  
Press the  
button again.  
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START  
STOP  
1 Press the  
button during operation.  
1 Press the  
button during operation.  
Each time the button is pressed, the OFF timer mode  
alternates between ON and OFF.  
Each time the button is pressed, the ON timer mode  
alternates between ON and OFF.  
I LONG mode is also released in the following ways.  
VANE  
By pressing the  
button  
HR.  
HR.  
2 Set the time of the timer using the  
and  
2 Set the time of the timer using the  
and  
ECONO COOL  
MIN.  
MIN.  
By pressing the  
button (only during COOL mode)  
buttons.  
buttons.  
HR.  
HR.  
I Even when the LONG mode is being used, the air may not reach a long dis-  
tance due to the installation location of the air conditioner.  
Each time the  
button is pressed, the set time in-  
Each time the  
creases by 1 hour; each time the  
the set time increases by 10 minutes.  
button is pressed, the set time in-  
MIN.  
MIN.  
creases by 1 hour; each time the  
the set time increases by 10 minutes.  
button is pressed,  
button is pressed,  
FAN  
In this case, press the  
button to set the fan speed to  
(High), and  
LONG  
then press the  
button.  
To release the OFF timer:  
To release the ON timer:  
FAN  
MODE  
WIDE VANE  
STOP  
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,
, and  
buttons, temperature buttons and the ON/OFF timer  
START  
Press the  
button.  
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Press the  
button.  
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are available.  
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.)  
If the current time has not been set, the timer operation cannot 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 starts operating with timer  
cancelled at the same time that power is restored.  
8
WHEN THE AIR CONDITIONER IS NOT GOING TO BE  
USED FOR A LONG TIME  
MAINTENANCE  
Before starting maintenance  
Cleaning the indoor unit  
Turn off the breaker and/or disconnect the  
power supply plug.  
Clean the unit using a soft dry cloth.  
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I
When it is not going to be used for a long  
time:  
When the air conditioner is to be used  
again:  
If the dirt is noticeable, wipe the unit with a cloth  
soaked in a solution of mild detergent diluted in luke-  
warm water.  
1 Perform the FAN operation for 3 or 4 hours  
1 Clean the air filter and install it in the indoor  
CAUTION:  
Do not use gasoline, benzine, polishing powder, or  
insecticide. The unit may be damaged.  
to dry the inside of the air conditioner.  
unit.  
When the unit is to be cleaned, switch it off and discon-  
nect the power supply plug or turn off the breaker. Since  
the fan rotates at high speed during operation, it may  
cause an injury.  
To perform FAN operation, set the remote controller to  
the highest temperature in the MANUAL COOL mode.  
(Refer to page 7.)  
(Refer to page 10 for cleaning instructions.)  
2 Check that the air inlet and outlet of the in-  
door/outdoor units are not blocked with any  
obstacles.  
2 Turn off the breaker and/or disconnect the  
power supply plug.  
CAUTION  
3 Check that the earth is connected correctly.  
CAUTION:  
Do not open the front panel up past the level position.  
The panel may come off in order to prevent it from being damaged.  
Turn off the breaker or disconnect the power supply plug  
when the air conditioner is not going to be used for a  
long time.  
CAUTION:  
Earth the unit.  
Do not connect the earth to a gas pipe, water pipe, light-  
ning rod or the earth of a telephone. If the earthing is  
incorrect, it may cause an electric shock.  
The front panel may also come off if the upper part of the front panel is pulled down.  
Dirt may collect and this may cause a fire.  
3 Remove the batteries from the remote con-  
Do not exceed.  
troller.  
CAUTION:  
Movable  
range  
To prevent liquid leakage, take out all batteries when the  
remote controller is not going to be used for a long time.  
If the front panel comes off, attach it as explained below.  
I
Keeping the front panel level with one hand, 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. (1) Then, close the front panel. (2)  
1
Keep the front panel level and  
insert the hinges into the notches.  
2
Do not step onto an unstable bench when maintaining the unit, etc. This may cause an injury, etc. if you fall  
down.  
9
CLEANING THE CATECHIN AIR FILTER  
REPLACEMENT OF THE AIR CLEANING FILTER  
Do not open the front panel up past the level position.  
When the capacity is lowered because of dirt, etc., it is necessary to replace the air cleaning filter.  
The panel may come off in order to prevent it from being damaged.  
Air cleaning filter replacement  
About once every 4 months  
Cleaning the catechin air filter (about once every 2 weeks)  
1 Remove the catechin air filter.  
3 After washing with water/lukewarm water,  
1 Remove the catechin air filter.  
1 Install a new air cleaning filter.  
dry the catechin air filter well in the shade.  
Do not expose the catechin air filter to direct sun-  
light or heat from a fire when drying it.  
Open the front  
panel, then  
remove/replace  
the filter.  
2 Install the catechin air filter and securely  
Catechin air filter  
Catechin air filter  
Remove.  
close the front panel.  
2 Remove the air cleaning filter (White bellows  
type).  
CAUTION:  
When the catechin air filter is to be removed, do not touch  
the metal parts of the indoor unit.  
This may cause an injury.  
4 Install the catechin air filter.  
2 Remove dirt from the catechin air filter us-  
ing a vacuum cleaner or by washing the fil-  
ter with water.  
Air cleaning filter  
If the dirt is noticeable, wash the filter with a solu-  
tion of mild detergent diluted in lukewarm water.  
If hot water (50 °C or more) is used, the filter may  
be deformed.  
Air cleaning filter  
Install.  
If the air cleaning filter is clogged, it may lower the units capacity or cause condensation at the air outlet.  
The air cleaning filter is disposable. The standard usable term is about 4 months. However, if the colour of the filter turns  
to dark brown, replace the filter at once.  
Optional parts Optional parts are available from your local dealer.  
Name of parts  
Parts number  
AIR CLEANING FILTER  
MAC-1700FT  
Please purchase the optional parts (MAC-1700FT) as a set (2 pcs) for the first time use.  
What is Catechin air filter?  
The air filter is dyed with a natural material, catechin, that is contained in tea. The catechin air filter deodorizes  
odor and noxious gases such as formaldehyde, ammonia, and acetaldehyde. Moreover, it restraints the activity of  
the viruses adhering to the filter.  
10  
BEFORE CONTACTING THE SERVICE REPRE- WHEN YOU THINK THAT TROUBLE HAS OCCURRED  
SENTATIVE, CHECK THE FOLLOWINGAGAIN  
Question  
Answer (not a malfunction)  
Question  
Answer (not a malfunction)  
The air conditioner cannot This protects the air conditioner according to in-  
Water leaks from the out- During COOL and DRY operations, pipe or pipe  
Question  
Check points or Remedy  
be operated for about 3 min-  
utes when restarted.  
structions from the microprocessor. Please wait.  
door unit.  
connecting sections are cooled and this causes  
water to condense.  
The air conditioner cannot Is the breaker turned on?  
be operated.  
In the heating operation, the defrosting opera-  
tion makes water frozen on the outdoor unit melt  
and drip down.  
In the heating operation, water condensed on  
the heat exchanger drips down.  
Is the fuse blown?  
Is the ON timer set? (Page 8)  
Cracking sound is heard.  
This sound is generated by the expansion/con-  
traction of the front panel, etc. due to change in  
temperature.  
The room cannot be cooled Is the temperature setting correct? (Page 7)  
or heated sufficiently.  
Is the filter clean? (Page 10)  
The air from the indoor unit The air conditioner may suck in an odor adher-  
Are there any obstacles blocking the air inlet or  
outlet of the indoor or outdoor unit?  
Is a window or door open?  
smells strange.  
ing to the wall, carpet, furniture, cloth, etc. and  
blow it out with the air.  
White smoke is discharged In the heating operation, vapor generated by the  
from the outdoor unit. defrosting operation looks like white smoke.  
The fan of the outdoor unit When the outside temperature is low, the fan may  
Air does not blow out soon Please wait as the air conditioner is preparing  
in the heating operation. to blow out warm air.  
The air from the indoor unit Is the filter clean? (Page 10)  
smells strange.  
does not rotate even  
though the compressor is  
running. Even if the fan  
starts to rotate, it stops  
soon.  
not operate to maintain sufficient cooling capac-  
ity.  
The operation is stopped Defrosting of the outdoor unit is being done (De-  
The display on the remote Are the batteries exhausted? (Page 5)  
controller does not appear Is the polarity (+, -) of the batteries correct?  
for about 10 minutes in the  
heating operation.  
frosting operation).  
Since this is completed in 10 minutes, please  
wait. (When the external temperature is too low  
and humidity is too high, frost is formed.)  
or it is dim. The indoor unit  
does not respond to the re- Are any buttons on the remote controller of other  
mote control signal. electric appliances being pressed?  
(Page 5)  
The sound of water flowing This is the sound of refrigerant flowing inside the  
is heard.  
air conditioner.  
This is the sound of condensed water flowing in  
the heat exchanger.  
This is the sound of the heat exchanger defrost-  
ing.  
Hissing sound is some- This is the sound when the flow of refrigerant  
times heard. inside the air conditioner is switched.  
When a power failure oc- Does the air conditioner start operating again?  
curs.  
If the air conditioner had operated before the  
power failure, as these models are equipped with  
an auto restart function, the air conditioner  
should start operating again. (Refer to Descrip-  
tion of AUTO RESTART FUNCTIONon page  
6.)  
The room cannot be heated When the outside air temperature is low, the  
sufficiently. heating effect may not be sufficient.  
The sound as burbling is This sound is heard when the outside air is ab-  
heard.  
sorbed 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 swing operation of the This is for the swing operation of the VERTICAL  
VERTICAL VANE is sus-  
pended for about 15 sec-  
onds, then restarted.  
VANE to be performed normally.  
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 a multi-unit system, the A small amount of refrigerant continues to flow  
indoor unit which is not op-  
erating becomes warm and  
a sound, similar to water  
flowing, is heard from the  
unit.  
into the indoor unit even though it is not operat-  
ing.  
The room cannot be cooled When a ventilation fan or a gas cooker is used  
In the following cases, stop using the air conditioner and consult your dealer.  
sufficiently.  
in a room, the cooling load increases, resulting  
in an insufficient cooling effect.  
When the outside air temperature is high, the  
cooling effect may not be sufficient.  
When water leaks or drops from the indoor unit.  
When the left operation indicator lamp blinks.  
When the breaker trips frequently.  
The remote control signal may not be received in a room where an electronic  
ON/OFF type fluorescent lamp (inverter-type fluorescent lamp, etc.) is used.  
Operation of the air conditioner may interfere with radio or TV reception in  
areas where the reception is weak. An amplifier may be required for the af-  
fected device.  
The air conditioner starts These models are equipped with an auto restart  
Mist is discharged from the The cool air from the air conditioner rapidly cools  
the operation only with the  
main power turned on,  
though you do not operate  
the unit with the remote  
controller.  
function. When the main power is turned off with-  
out stopping the air conditioner with the remote  
controller and is turned on again, the air condi-  
tioner will start operation automatically in the  
same mode as the one set with the remote con-  
troller just before the shutoff of the main power.  
air outlet of the indoor unit.  
moisture in the air inside the room, and it turns  
into mist.  
When thunder is heard, stop operation and disconnect the power supply plug  
or turn off the breaker. Otherwise, the electrical parts may be damaged.  
The air flow direction When the air conditioner is operated in COOL  
changes during operation.  
The direction of the hori-  
zontal vane cannot be ad-  
justed with the remote con-  
troller.  
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.  
In the heating operation, if the air flow tempera-  
ture is too low or when defrosting is being done,  
the horizontal vane position is automatically set  
to horizontal.  
11  
INSTALLATION, RELOCATION AND INSPECTION  
CAUTION:  
Earth the unit.  
The installation location of the outdoor unit should be at least  
Installation place  
Avoid installing the air conditioner in the following places.  
3 m away from the antennas for TV sets, radios, etc. In areas  
where the reception is weak, provide greater space between  
the outdoor unit and the antenna of the affected device if op-  
eration of the air conditioner interferes with radio or TV recep-  
tion.  
Do not connect the earth to a gas pipe, water pipe, lightning rod or the earth of a telephone. If the earthing is  
incorrect, it may cause an electric shock.  
Install an earth leakage breaker depending on the place where the air conditioner is to be installed (humid places,  
etc.).  
Where flammable gas could leak.  
Inverter-type  
CAUTION:  
To prevent the effects  
of a fluorescent lamp,  
keep as far apart as  
possible.  
fluorescent lamp  
wall, etc.  
Do not install the unit where flammable gas could leak.  
If gas leaks and collects around the unit, it may cause  
an explosion.  
If the earth leakage breaker is not installed, it may cause an electric shock.  
Well-  
ventilated  
dry place  
Keep a space  
to prevent the  
picture  
Where there is much machine oil.  
Salty places such as the seaside.  
Where sulfide gas is generated such as a hot spring.  
Where oil is splashed or where the area is filled with  
oily smoke.  
Inspection and maintenance  
distortion or  
the noise.  
1 m  
or more  
100 mm or  
more  
When the air conditioner is used for several seasons, the capacity may be lowered due to dirt inside the unit.  
Depending on the condition, an odor may be generated or dehumidified water may not drain out smoothly due to dirt,  
dust, etc.  
It is recommended that the unit be inspected and maintained (charged) by specialist in addition to normal maintenance.  
Consult your dealer.  
500 mm or  
more  
TV  
1 m  
Cordless  
or more  
phone or  
Portable  
phone  
3 m  
or more  
Where there is high-frequency or wireless equipment.  
Radio  
* The required space depends on the type of outdoor unit.  
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.  
Operating sound considerations  
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.  
If an abnormal sound is heard during operation, consult your dealer.  
Relocation  
Electrical work  
When the air conditioner is to be removed or re-installed because of rebuilding, moving, etc., special techniques and  
work are required.  
Provide an exclusive circuit for the power supply of the air conditioner.  
Be sure to observe the breaker capacity.  
WARNING:  
WARNING:  
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.  
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.  
Do not use intermediate connection of the power supply cord or the extension cord and do not connect many  
devices to one AC outlet.  
Disposal  
To dispose of this product, consult your dealer.  
A fire or an electric shock may result from poor contact, poor insulation, exceeding the permissible current, etc.  
Consult your dealer.  
If you have any questions, consult your dealer.  
Guaranteed operating range  
Indoor  
Outdoor  
32°C DB  
23°C WB  
21°C DB  
15°C WB  
27°C DB  
43°C DB  
Upper limit  
Lower limit  
Upper limit  
Lower limit  
Cooling  
Heating  
-10°C DB  
24°C DB  
18°C WB  
-10°C DB  
-11°C WB  
20°C DB  
12  
NOTE  
NOTE  
NOTE  
HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN  
SG79Y329H01  

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