Please read this manual carefully before operating your set and retain it for future
Original instruction
P/NO : MFL69440102
Fresh Air Intake Unit Owner’s Manual
Safety Precautions.................3
Write the model and serial numbers here:
Model #
Prior to Operation ..................6
Serial #
Operation Details ...................7
You can find them on a label on the side of each unit.
Operation Range ..................7
Maintenance and Service ......8
Before you Call for
Dealer's Name
Date Purchased
n Staple your receipt to this page in the event you need
to prove date of purchase or to issue warranty.
Inside you will find many helpful hints on how to use and
maintain your air conditioner properly. Just a little preventive care on your part can save you a great deal of time
and money over the life of your air conditioner.
You'll find many answers to common problems in the
chart of troubleshooting tips. If you review our chart of
Troubleshooting Tips first, you may not need to call for
service at all.
• Contact the authorized service technician for repair or
maintenance of this unit.
• Contact the installer for installation of this unit.
• The air conditioner is not intended for use by young children or invalids without supervision.
• Young children should be supervised to ensure that they
do not play with the air conditioner.
• When the power cord is to be replaced, replacement work
shall be performed by authorized personnel only using
only genuine replacement parts.
• Installation work must be performed in accordance with
the National Electric Code by qualified and authorized
personnel only.
2 Fresh Air Intake Unit
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified
by the following indications.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
n Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
n Installation
Do not use a defective or underrated circuit breaker. Use
this appliance on a dedicated
• There is risk of fire or electric
Install the panel and the cover
of control box securely.
For electrical work, contact the
dealer, seller, a qualified electrician, or an Authorized Service
• Do not disassemble or repair the
product. There is risk of fire or
electric shock.
Always install a dedicated circuit and breaker.
Always ground the product.
• There is risk of fire or electric
Use the correctly rated breaker
or fuse.
• There is risk of fire or electric
• Improper wiring or installation
may cause fire or electric shock
• There is risk of fire or electric
Do not modify or extend the
power cable.
Do not install, remove, or re-install the unit by yourself (customer).
Be cautious when unpacking
and installing the product.
• There is risk of fire, electric shock,
explosion, or injury.
• Sharp edges could cause injury.
Be especially careful of the case
edges and the fins on the condenser and evaporator.
Do not install the product on a
defective installation stand.
Be sure the installation area
does not deteriorate with age.
• There is risk of fire or electric
For installation, always contact
the dealer or an Authorized
Service Center.
• There is risk of fire, electric shock,
explosion, or injury.
• It may cause injury, accident, or
damage to the product.
• If the base collapses, the air conditioner could fall with it, causing
property damage, product failure,
and personal injury.
Owner’s Manual 3
Safety Precautions
Safety Precautions
n Operation
Do not let the air conditioner
run for a long time when the
humidity is very high and a
door or a window is left open.
• Moisture may condense and wet
or damage furniture.
Do not plug or unplug the
power supply plug during operation.
• There is risk of fire or electric
Do not allow water to run into
electric parts.
• It may cause There is risk of fire,
failure of the product, or electric
When flammable gas leaks,
turn off the gas and open a window for ventilation before turn
the product on.
• Do not use the telephone or turn
switches on or off.
There is risk of explosion or fire
Do not open the inlet grill of the
product during operation.
(Do not touch the electrostatic
filter, if the unit is so equipped.)
• There is risk of physical injury,
electric shock, or product failure.
Take care to ensure that power
cable could not be pulled out or
damaged during operation.
• There is risk of fire or electric
Do not touch(operate) the product with wet hands.
• There is risk of fire or electrical
Do not store or use flammable
gas or combustibles near the
• There is risk of fire or failure of
If strange sounds, or small or
smoke comes from product.
Turn the breaker off or disconnect the power supply cable.
• There is risk of electric shock or
When the product is soaked
(flooded or submerged), contact an Authorized Service Center.
• There is risk of fire or electric
Ventilate the product from time to time when operating it together with a stove, etc.
Do not place anything on the
power cable.
• There is risk of fire or electric
Do not place a heater or other
appliances near the power
• There is risk of fire and electric
Do not use the product in a
tightly closed space for a long
• Oxygen deficiency could occur.
Stop operation and close the
window in storm or hurricane.
If possible, remove the product
from the window before the
hurricane arrives.
• There is risk of property damage,
failure of product, or electric
Be cautious that water could
not enter the product.
• There is risk of fire, electric shock,
or product damage.
Turn the main power off when cleaning or maintaining the product.
• There is risk of fire or electric shock.
• There is risk of electric shock.
When the product is not be used for a long time,
disconnect the power supply plug or turn off the
Take care to ensure that nobody could step on or
fall onto the outdoor unit.
• There is risk of product damage or failure, or unintended operation.
4 Fresh Air Intake Unit
• This could result in personal injury and product damage.
Safety Precautions
Always check for gas (refrigerant)
leakage after installation or repair
of product.
• Low refrigerant levels may
cause failure of product.
Do not install the product where the noise
or hot air from the outdoor unit could
damage the neighborhoods.
• It may cause a problem for your
Install the drain hose to ensure
that water is drained away properly.
Keep level even when installing
the product.
• A bad connection may cause
water leakage.
• To avoid vibration or water leakage.
Use two or more people to lift and
transport the product.
• Avoid personal injury.
n Operation
Do not expose the skin directly
to cool air for long periods of
time. (Don't sit in the draft.)
Do not use the product for special purposes, such as preserving foods,
works of art, etc. It is a consumer air
conditioner, not a precision refrigeration system.
• This could harm to your health.
• There is risk of damage or loss
of property.
Use a soft cloth to clean. Do
not use harsh detergents, solvents, etc.
Do not touch the metal parts of the
product when removing the air filter. They are very sharp!
• There is risk of fire, electric
shock, or damage to the plastic
parts of the product.
Always insert the filter securely.
Clean the filter every two weeks
or more often if necessary.
• A dirty filter reduces the efficiency of
the air conditioner and could cause
product malfunction or damage.
Use a firm stool or ladder when
cleaning or maintaining the
• Be careful and avoid personal
n Installation
• There is risk of personal injury.
Do not insert hands or other objects
through the air inlet or outlet while the
product is operated.
• There are sharp and moving parts
that could cause personal injury.
Replace the all batteries in the remote control with new ones of the
same type. Do not mix old and new
batteries or different types of batteries.
• There is risk of fire or explosion
If the liquid from the batteries gets onto your skin
or clothes, wash it well with clean water. Do not
use the remote if the batteries have leaked.
• The chemicals in batteries could cause burns or
other health hazards.
Do not install the product where
it will be exposed to sea wind
(salt spray) directly.
• It may cause corrosion on the product.
Corrosion, particularly on the condenser
and evaporator fins, could cause product
malfunction or inefficient operation.
Do not block the inlet or outlet
of air flow.
• It may cause product failure.
Do not step on or put anyting
on the product. (outdoor units)
• There is risk of personal injury
and failure of product.
Do not drink the water drained
from the product.
• It is not sanitary and could cause
serious health issues.
Do not recharge or disassemble the batteries.
Do not dispose of batteries in a
• They may burn or explode.
If you eat the liquid from the batteries, brush your
teeth and see doctor. Do not use the remote if the
batteries have leaked.
• The chemicals in batteries could cause burns or
other health hazards.
Owner’s Manual 5
Prior to Operation
Prior to Operation
Preparing for operation
1. Contact an installation specialist for installation.
2. Use a dedicated circuit.
1. Being exposed to direct airflow for an extended period of time could be hazardous to your health.
Do not expose occupants, pets, or plants to direct airflow for extended periods of time.
2. Due to the possibility of oxygen deficiency, ventilate the room when used together with stoves or
other heating devices.
3. Do not use this air conditioner for non-specified special purposes (e.g. preserving precision devices, food, pets, plants, and art objects). Such usage could damage the items.
Cleaning and maintenance
1. Do not touch the metal parts of the unit when removing the filter. Injuries can occur when handling
sharp metal edges.
2. Do not use water to clean inside the air conditioner. Exposure to water can destroy the insulation,
leading to possible electric shock.
3. When cleaning the unit, first make sure that the power and breaker are turned off. The fan rotates
at a very high speed during operation. There is a possibility of injury if the unit’s power is accidentally triggered on while cleaning inner parts of the unit.
For repair and maintenance, contact your authorized service dealer.
6 Fresh Air Intake Unit
Operation Details
Operation Details
Operation range
FAU will operate in the below range. Hot outdoor temperature (over 43℃) or cold outdoor temperature (under 5℃) will make customer feel uncomfortable because FAU outlet temperature might be not enough controlled in
that region. * FAU : Fresh Air Intake Unit
Cooling mode
Outdoor Air Temperature (Toa) ℃
43℃ (1)
Fan operation (thermo off)
Fan operation
Fan stop
Heating mode
Fan operation (thermo off)
Fan operation
Automatic mode
(1)Normal model : 43°C
Tropical model : 48°C
Usage Limitations
43℃ (2)
(2)Normal model : 43°C
Tropical model : 48°C
Owner’s Manual 7
Maintenance and Service
Maintenance and Service
CAUTION: Before performing any maintenance, turn off the main power to
the system.
Grille, Case, and Remote Controller
o Turn the system off before cleaning. To clean, wipe with a
soft, dry cloth. Do not use bleach or abrasives.
Air outlet vent
Air filter
Power supply must be disconnected before
cleaning the indoor unit.
Air filter
The air filters behind the front grille should be checked and
cleaned once every 2 weeks or more often if neccessary.
1. Remove the Air filter.
n Take hold of the tab and pull slightly forward
to remove the filter.
CAUTION: When the air filter is
to be removed, do not touch the
metal parts of the indoor unit.
It may cause an injury.
n Never use any of the followings:
• Water hotter than 40°C.
Could cause deformation
and/or discoloration.
• Volatile substances.
Could damage the
surfaces of the air
8 Fresh Air Intake Unit
2. Clean dirt from the air filter using a vacuum
cleaner or washing with water.
n If dirt is conspicuous, wash with a neutral
detergent in lukewarm water.
n If hot water (50°C or more) is used, it may
be deformed.
3. After washing with water, dry well in
the shade.
n Do not expose the air filter to direct sunlight or heat from a fire when drying it.
4. Install the air filter.
Maintenance and Service
When it is not going to be used for
a long time.
When the air conditioner is used again.
Operate the air conditioner at the following settings for 2 to 3 hours.
• Type of operation: Fan operation mode.
• This will dry out the internal mechanisms.
Turn off the breaker.
Clean the air filter and install it in the
indoor unit.
Check that the air inlet and outlet of the
indoor/outdoor unit are not blocked.
Turn off the breaker when the air conditioner
is not going to be used for a long time.
Dirt may collect and may cause a fire.
Check that the ground wire is connected correctly. It may be connected
to the indoor unit side.
Helpful information
The air filters and your electiric bill.
If the air filters become clogged with dust, the
cooling capacity will drop, and 6% of the electricity
used to operate the air conditioner will be wasted.
Operation Tips
Do not overcool the room.
Keep blinds or curtains
Keep the room temperature
This is not good for the health
and wastes electricity.
Do not let direct sunshine
enter the room when the air
conditioner is in operation.
Adjust the vertical and horizontal airflow direction to ensure a uniform temperature in
the room.
Make sure that the doors
and windows are shut tight.
Clean the air filter regularly.
Ventilate the room occasionally.
Avoid opening doors and windows as much as possible to
keep the cool air in the room.
Blockages in the air filter reduce the airflow and lower
cooling and dehumidifying effects. Clean at least once
every two weeks.
Since windows are kept
closed, it is a good idea to
open them and ventilate the
room now and then.
Owner’s Manual 9
When the air conditioner is not going to be used for a long time.
Maintenance and Service
Before you call for service...
Troubleshooting Tips! Save time and money!
Check the following points before requesting repairs or service.... If the malfunction persists,
please contact your dealer.
The air conditioner
does not operate.
The room has a peculiar odor.
It seems that condensation is leaking
from the air conditioner.
Air conditioner does
not operate for about
3 minutes when
• Have you made a
mistake in timer operation?
• Has the fuse blown
or has the circuit
breaker been
• Check that this is not
a damp smell exuded
by the walls, carpet,
furniture or cloth
items in the room.
• Condensation occurs
when the airflow from
the air conditioner
cools the warm room
• This is the protector
of the mechanism.
• Wait about three minutes and operation
will begin.
Does not cool or heat
The air conditioner
operation is noisy.
Crack sound is
Remote control display is faint, or no
display at all.
• Is the air filter dirty?
See air filter cleaning
• The room may have
been very hot when
the room air conditioner was first turned
on. Allow time for it to
cool down.
• Has the temperature
been set incorrectly?
• Are the indoor unit's
air inlet or outlet vents
• For a noise that
sounds like water
-This is the sound of
freon flowing inside
the air conditioner
• For a noise that
sounds like the compressed air releasing
into atmosphere.
-This is the sound of
the dehumidifying
water being
processed inside the
air conditioning unit.
• This sound is generated
by the expansion/ constriction of the front
panel, etc. due to
changes of temperature.
• Are the batteries depleted?
• Are the batteries inserted in the opposite
(+) and (-) directions? Filter sign lamp
(LED) is ON.
• Cleaning the filter,
press the Timer button
and ◀ button of wired
remote controller at
the same time for 3
WATER RESISTANT: The outdoor side of this appliance is WATER RESISTANT.
The indoor side is not water resistant and should not be exposed to excess water.
10 Fresh Air Intake Unit
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