Please read this manual carefully before operating your set and retain it
for future reference.
P/NO : MFL69485707
[Representative] LG Electronics Inc. EU Representative : LG Electronics European Shared
Service Center B.V. Krijgsman 1, 1186 DM Amstelveen, The Netherlands
[Manufacturer] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro, Seongsan-gu,
Changwon-si, Gyeongsangnam-do, KOREA
For more information, Refer to the CD or LG Web site (www.lg.com)
Original instruction
Wall Mounted Type Indoor Unit Owner’s Manual
Safety Precautions ....................3
Write the model and serial numbers here:
Model #
Serial #
Prior to Operation......................8
You can find them on a label on the side of each unit.
Dealer's Name
Date Purchased
Product Introduction.................9
n Staple your receipt to this page in the event you need
it to prove date of purchase or for warranty issues.
Operating Instructions..............9
Maintenance and Service .......10
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.
Before you Call for Service....13
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.
Indoor Unit
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be
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
For electrical work,
contact the dealer,
seller, a qualified
electrician, or an
Authorized Service
Always ground the
• There is risk of fire or
electric shock.
• Do not disassemble or
repair the product.
There is risk of fire or
electric shock.
• There is risk of fire or
electric shock.
Install the panel and
the cover of control
box securely.
Always install a
dedicated circuit and
• There is risk of fire or
electric shock.
• Improper wiring or
installation may cause
fire or electric shock
Do not use a defective
or underrated circuit
breaker. Use this
appliance on a
dedicated circuit.
Use the correctly rated
breaker or fuse.
• There is risk of fire or
electric shock.
Owner’s Manual 3
Safety Precautions
Safety Precautions
Do not modify or
extend the power
• There is risk of fire or
electric shock.
Do not install, remove,
or re-install the unit by
yourself (customer).
• There is risk of fire,
electric shock,
explosion, or injury.
Be cautious when
unpacking and
installing the product.
• Sharp edges could
cause injury. Be
especially careful of the
case edges and the fins
on the condenser and
For installation,
always contact the
dealer or an
Authorized Service
Do not install the
product on a defective
installation stand.
Do not turn on the
breaker or power under
condition that front
panel, cabinet, top
cover, control box cover
are removed or opened.
• There is risk of fire,
electric shock,
explosion, or injury.
• It may cause injury,
accident, or damage to
the product.
• Otherwise, it may cause
fire, electric shock,
explosion or death.
Be sure the installation area does
not deteriorate with age.
Use a vacuum pump or Inert
(nitrogen) gas when doing leakage
test or air purge. Do not compress
air or Oxygen and Do not use
Flammable gases. Otherwise, it
may cause fire or explosion.
• There is the risk of death, injury, fire
• If the base collapses, the air
conditioner could fall with it, causing or explosion.
property damage, product failure,
and personal injury.
Indoor Unit
Safety Precautions
Do not place anything
Take care to ensure
that power cable could on the power cable.
not be pulled out or
damaged during
• There is risk of fire or
• There is risk of fire or
electric shock.
electric shock.
Do not place a heater
or other appliances
near the power cable.
• There is risk of fire and
electric shock.
Do not use the
product in a tightly
closed space for a
long time.
• Oxygen deficiency
could occur.
Do not touch(operate)
the product with wet
• There is risk of fire or
electrical shock.
Do not store or use
flammable gas or
combustibles near the
• It may cause There is • There is risk of fire or
risk of fire, failure of the failure of product.
product, or electric
Do not allow water to
run into electric parts.
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
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 fire.
When the product is
Do not open the inlet
Stop operation and
soaked (flooded or
grill of the product
close the window in
submerged), contact
during operation.
storm or hurricane.
an Authorized Service
If possible, remove the (Do not touch the
electrostatic filter, if
product from the
the unit is so
window before the
hurricane arrives.
• There is risk of property • There is risk of physical • There is risk of fire or
injury, electric shock, or electric shock.
damage, failure of
product failure.
product, or electric
Owner’s Manual 5
n Operation
Safety Precautions
Be cautious that water
could not enter the
• There is risk of fire,
electric shock, or
product damage.
Take care to ensure
that nobody could
step on or fall onto the
outdoor unit.
• This could result in
personal injury and
product damage.
Ventilate the product
from time to time
when operating it
together with a stove,
• There is risk of fire or
electric shock.
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.
Turn the main power
off when cleaning or
maintaining the
• There is risk of electric
Do not turn on the
breaker or power
under condition that
front panel, cabinet,
top cover, control box
cover are removed or
• Moisture may condense • Otherwise, it may cause
and wet or damage
fire, electric shock,
explosion or death.
n Installation
Always check for gas
(refrigerant) leakage
after installation or
repair of product.
• Low refrigerant levels
may cause failure of
Install the drain hose
to ensure that water is
drained away properly.
• A bad connection may
cause water leakage.
Keep level even when
installing the product.
• To avoid vibration or
water leakage.
Use two or more people to lift and transport the product.
• Avoid personal injury.
Indoor Unit
Safety Precautions
Do not expose the skin
directly to cool air for
long periods of time.
(Don't sit in the draft.)
• This could harm to your
Use a soft cloth to
clean. Do not use harsh
detergents, solvents,
• 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.
Do not block the inlet or
Do not use the product for
outlet of air flow.
special purposes, such as
preserving foods, works of
art, etc. It is a consumer air
conditioner, not a precision
refrigeration system.
• There is risk of damage • It may cause product
or loss of property.
Do not touch the metal
parts of the product
when removing the air
filter. They are very
Do not step on or put
anyting on the product.
(outdoor units)
• There is risk of personal
• There is risk of personal
injury and failure of
Do not insert hands or
other objects through
the air inlet or outlet
while the product is
• There are sharp and
moving parts that could
cause personal injury.
Do not drink the water
drained from the
• It is not sanitary and
could cause serious
health issues.
Use a firm stool or ladder when cleaning or maintaining the product.
• Be careful and avoid personal injury.
Owner’s Manual 7
n Operation
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.
Indoor Unit
Product Introduction
Product Introduction
Here is a brief introduction of the indoor units.
Indoor Units
Air filter
Front grille
Signal receiver
On/Off button
Air outlet
Air deflector
(Vertical louver & Horizontal vane)
* The feature can be changed according to the type of model.
The number of operation lamps and their locations may vary, depending on the model of the
air conditioner.
Operating Instructions
Auto Restart Function
In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate
procedures automatically to the previous operating conditions.
Owner’s Manual 9
Maintenance and Service
Maintenance and Service
Before performing any maintenance, turn off the main power to the system.
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 conditioner.
P owd
Air Filters
The air filters behind the front panel / grill should be checked and cleaned once in
every 2 weeks or more often if necessary. To remove the filters see the self
explanatory diagrams for each model type. Clean the filters with a vacuum cleaner
or warm soapy water. If dirt is not easily removed, wash with a solution of
detergent in luke warm water. Dry well in shade after washing and reinstall the filters back in place.
Clean the air filter
Clean the air filter once every 2 weeks or more if necessary.
1. Turn off the power and unplug the power cord.
2. Hold the knob of air filter, Lift it up slightly.
* The feature can be changed according to type of model.
3. Hold the knob of the air filter, lift it up slightly and remove it from the unit.
* The feature can be changed according to type of model.
4. Clean the filter with a vacuum cleaner or with warm water.
- If dirt is difficult to remove, wash the filter in lukewarm water with detergent.
5. Dry the filter in the shade.
The air filter can be broken when it is bended.
Indoor Unit
G a s o li n e
Maintenance and Service
Assemble the air filter
Clean the air filter once every 2 weeks or more if necessary.
1. Turn off the power and unplug the power cord.
2. Insert the hooks of the air filter into the front grille.
3. Push down hooks to assemble the air filter.
4. Check side of the front grille for the air filter assembled correctly.
The air filter is not assembled correctly, Dust and other substance come into the indoor unit.
If look at the indoor unit from higher than it, can assemble the top filter easily.
Owner’s Manual 11
Maintenance and Service
When the air conditioner is not going to be used for a long time.
When it is not going to be used for
a long time.
When the air conditioner is to be 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.
(Refer to page 10 for cleaning it.)
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 connect
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
Avoid opening doors and
windows as much as possible
to keep the cool air in the
Blockages in the air filter
reduce the airflow and lower
cooling and dehumidifying
effects. Clean at least once
every two weeks.
Indoor Unit
Since windows are kept
closed, it is a good idea to
open them and ventilate the
room now and then.
Maintenance and Service
Troubleshooting Tips! Save time and money!
Check the following points before requesting repairs or service.... If the malfunction persist,
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
Air conditioner does
not operate for about
3 minutes when
• 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
• 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
-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
• Have you made a
mistake in timer
• Has the fuse blown
or has the circuit
breaker been
Remote control
display is faint, or no
display at all.
• Are the batteries
• 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 s
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.
Owner’s Manual 13
Before you call for service...
Indoor Unit
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