Thank you for purchasing a MITSUBISHI HEAVY INDUSTRIES, LTD. Air-Conditioner. To
get the best long-lasting performance, read and follow this User’s Manual carefully before
using your air-conditioner. After reading, please store the Manual in a safe place and refer
to it for operational questions or in the event of any irregularities.
This air-conditioner is intended for domestic use.
An alternative refrigerant (R410A) is used in this air-conditioner. When asking the
dealer for service or inspection and maintenance, explain the dealer about this matter.
When to contact your distributor without delay ......................................................................... 20
Self diagnosis function ............................................................................................................... 20
–1–
Safety precautions
• Before starting to use the system, please read these “Safety precautions” carefully to ensure proper operation of the system.
• The safety precautions are classified as “
improper handling could have dramatic consequences like death, serious injury, etc. Nevertheless, even precautions as shown in the column “
CAUTION” might pose a serious problem, depending on the circumstances. Please observe these precautions with great care, since they are
essential to your safety.
• Symbols which appear frequently in the text have the following meaning:
DANGER” and “CAUTION”. Precautions as shown in the column “DANGER” indicate that
Strictly prohibitedProvide positive earthing
Observe instructions with
great care
• When you have read the instruction manual, please keep it near at hand for consultation. If someone else takes over as operator, make certain that the
manual is also passed on to the new operator.
❚ INSTALLATION PRECAUTIONS
DANGER
The system is meant for domestic, residential etc. use.The system must be installed by your dealer or a qualified pro-
If used in inferior environments, such as an engineering
workplace, the equipment may function poorly.
Do not install near places where inflammable gas may leak.
Gas leaks may cause fire.If you don’t fit a circuit breaker, you may cause an electric
Make sure that you drain the hose properly, so that all the
water has dripped out.
Negligence may cause flooding in the room resulting in wet
furniture.
fessional.
It is not advisable to install the system yourself, as faulty
handling may cause leakage of water, electric shock or fire.
CAUTION
Depending on the place of installation, a circuit breaker may
be necessary.
shock.
Make sure that the system has been properly earthed.
Earth cables should never be connected to a gas pipe, municipal
water pipe, lightning conductor or telephone earth cable. Incorrect installation of the earth cable may produce an electric shock.
❚ OPERATION PRECAUTIONS
Do not expose yourself to the cooling
air for prolonged periods.
This could affect your physical condition and cause health problems.
Only use approved fuses.
Use of steel or copper wire instead of
an approved fuse is strictly forbidden,
as it may cause a breakdown or fire.
Do not place a combustible insecticide
or paint spray near the blower, nor aim it
directly at the system.
This may result in a fire.The appliance may then work inad-
DANGER
Do not insert anything into the air inlet.
This may cause injury, as the internal fan rotates at high speed.
CAUTION
Do not handle the switches with wet
hands.
This may cause an electric shock.If the system falls down,
You should not expose any combustion appliance directly to the air
stream of the air-conditioner.
equately.
–2–
Store the remote control out of reach
of infants.
Failure to observe this may result in
the batteries being swallowed or
other accidents.
Don’t swing from the system.
you may get injured.
Do not wash the air-conditioner with water.
This could cause an electric shock.
Safety precautions
The system should only be used for its original purpose
and not for anything else like, for instance, preservation of
food, plants or animals, precision devices or works of art.
Do not place anything containing water, like vases, on top of the unit.
CAUTION
Do not install the system at a place
where the air stream of the blower is
aimed directly at plants or animals.
The system is only intended for use in
ordinary domestic rooms. Any other
use of the system may damage the
quality of food, etc.
Do not sit on the outdoor unit nor put
anything on it.
If the unit falls down or things drop
off it, people could get hurt.
Do not place household electrical appliances or household items beneath the
indoor or outdoor units.
Condensation falling from the unit
can stain objects and cause accidents
or electrical shock.
When you clean the system, stop the
unit and turn off the power switch.
Never clean the unit while the internal
fan is rotating.
Water entering the unit could damage the insulation and therefore
cause an electric shock.
After a long period of use, check the unit's
support structure from time to time.
If you don't repair any damage
straightaway, the unit may fall
down and cause personal injury.
If you operate the system together
with a combustion appliance, you
must regularly ventilate the indoor air.
Insufficient ventilation may cause
accidents due to oxygen deficiency.
Do not place objects near the outdoor
unit or allow leaves to gather around
the unit.
If there are objects or leaves around
the outdoor unit, small animals
may enter unit and contact electrical parts resulting in break down,
emission of smoke or flame.
This will damage their health.
Do not touch the aluminum fins on the
air heat exchanger.
Failure to observe this may result in
injury.
Stand firmly on a stepladder or other
stable object when removing the inlet
panel and filters.
Failure to observe this may result in
injury through insecure objects toppling over.
Contact your dealer to clean inside
the indoor unit, do not attempt to do
so yourself.
The use of a non-approved detergent
or improper washing method can
damage the unit’s plastic components and cause leaks. Damage,
smoke, or fire can also result if the
detergent comes in contact with
electrical parts or the unit’s motor.
Stop the unit and turn off power if you
hear thunder or there is a danger of
lightning.
Electrical storms can damage the unit.
❚ PRECAUTIONS FOR TRANSFER OR REPAIRS
DANGER
Consult your dealer for repairs to the
system.
Wrong repairs could cause an electric
shock, fire, etc.
If the air-conditioner fails to cool or warm, it may have a refrigerant leak. Contact
your dealer.
If refrigerant needs to be added, check with your dealer for proper instructions.
The refrigerant used in your air-conditioner is safe. However, if refrigerant unexpectedly leaks
from the unit onto a fan heater, stove, hotplate or other heat source, harmful products could be
released.
If the air-conditioner is moved elsewhere, contact your dealer or a professional fitter.
Faulty installation may cause water
leakage, electric shock, fire, etc.
If you notice anything abnormal (smell of
burning, etc.), stop the system, turn off the
power switch and consult your dealer.
Continued use of the system in abnormal circumstances may result in
malfunctioning, electric shock, fire,
etc.
–3–
Name of each part and its function
INDOOR UNIT
Air Inlet panel
Draws in the indoor air.
Air filter
Removes dust or dirt from the inlet air.
Page 16
Air-cleaning filter
Room temperature detector
Unit operation switch
Air outlet
Air blows out of here.
Left/right air flow adjustment louver
Page 8
Up/down air flow direction adjustment flap
Page 8
Drain hose
Drains water from the dehumidified air.
Unit indication section
TIMER light (yellow)
Illuminates during TIMER operation.
RUN (HOT KEEP) light (green)
• Illuminates during operation and CLEAN
operation.
Blinks at air flow stop due to the ‘HOT KEEP’.
•
1.5 sec.
ON
OFF
Page 19
0.5 sec.
RUNTIMER
ON / OFF
Refrigerant piping connection electric flex
HI POWER light (green)
Illuminates during HIGH POWER operation.
3D AUTO light (green)
Illuminates during 3D AUTO operation.
HI POWER3D AUTO
Unit ON/OFF button
In emergencies, this button can be used for turning on/off the unit
when remote control is not available.
Page 13
Remote control signal receiver
–4–
Transmission procedure
When each button on the remote control is pressed – with the remote control pointing towards the air-conditioner unit a signal is transmitted.
When the air-conditioner receives the signal correctly, it will beep.
Present time setting procedure
■ When inserting the batteries, the present time is automatically set to time setting mode.
Example: Set to 10:30.
1
2
3
• The timer operation is set on the basis of the present time, so please set it cor-
• The remote control data is reset when the present time is set.
Press the ACL switch.
Press with the tip of a ballpoint pen, etc.
The time indicator blinks and can be set to the current time.
Press the “ or ” button.
(Set to 10:30)
Press within
Press the ON/OFF button.
The indication changes from blinking to steady lighting and the setting is complete.
NOTE
rectly.
–5–
60 sec.!
AUTO mode operation procedure
■
Automatically selects the operation mode (COOL, HEAT, DRY) depending on the room temperature when switched on.
When the unit is not in AUTO mode:
Air flow direction adjustment
procedure.
Page 8
1
Press MODE button.
Move the [ mark] to the (Auto) position.
Aim the remote control at the air-conditioner.
Press the ON/OFF button.
2
NOTE
• Air is not blowing out during the op-
eration.
Page 19
To stop:Press the ON/OFF button.
AUTO mode can be
operated by simply
pressing the ON/OFF
button.
• If you don’t want the AUTO mode program, change to
COOL, HEAT, DRY or FAN instead of AUTO.
Page 7
Temperature adjustment during AUTO
■
Air temperature adjustment is possible even during automatic operation. There are 6 levels of adjustment possible with the button or the button.