OWNER’S MANUAL
ROOM
AIR
CONDITIONER
ENGLISH
Please read this manual carefully before operating
your set and retain it for future reference.
TYPE : WINDOW
P/NO : MFL67740303
www.lg.com
2 Room Air Conditioner
FOR YOUR RECORDS
Write the model and serial numbers here:
Model #
Serial #
You can find them on a label on the side of each unit.
Dealer's Name
Date Purchased
■ Staple your receipt to this page in the event you need it
to prove date of purchase or for warranty issues.
READ THIS MANUAL
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.
PRECAUTION
• 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.
Safety Precautions..........................3
Introduction ....................................8
Installation ......................................9
Operating Instructions .................14
Maintenance and Service ............21
Window-Type Air Conditioner Owner’s Manual
TABLE OF CONTENTS
ENGLISH
Before Operation ..............................7
Specification..................................26
Owner’s Manual 3
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions
must be followed.
■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness
is classified by the following indications.
■ Meanings of symbols used in this manual are as shown below.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
■ Installation
Be sure not to do.
Be sure to follow the instruction.
Don’t use a power cord, a
plug or a loose socket which
is damaged.
• Otherwise, it may cause a
fire or electrical shock.
Always ground the
product.
• There is risk of fire or
electric shock.
Do not modify or extend
the power cable.
• There is risk of fire or
electric shock.
Do not disassemble or
modify products.
• It may cause failure and
electric shock.
Be caution when unpacking
and installing.
• Sharp edges may cause
injury.
Do not use the power cord near
flammable gas or combustibles
such as gasoline, benzene,
thinner, etc.
• It may cause explosion or
fire.
ENGLISH
WARNING
CAUTION
4 Room Air Conditioner
Safety Precautions
■ Operation
Do not place the power cord
near a heater.
• It may cause fire and electric
shock.
Do not allow water to run
into electric parts.
• It will cause failure of machine
or electric shock.
Use a soft cloth to clean. Do
not use wax, thinner, or a
strong detergent.
• The appearance of the air
conditioner may deteriorate,
change color, or develop
surface flaws.
Ventilate the room well when
using this appliance
together with a stove, etc.
• An oxygen shortage may
occur.
Turn off the power and
breaker firstly when
cleansing the unit.
• Since the fan rotates at high
speed during operation, it may
cause injury.
Turn off the main power
switch when not using it for
a long time.
• Prevent accidental startup and
the possibility of injury.
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.
Do not open the suction inlet
grill of the product during
operation.
• Otherwise, it may electrical
shock and failure.
Do not place heavy object
on the power cord and take
care so that the cord should
not be pressed.
• There is danger of fire or
electric shock.
Always install a dedicated
circuit and breaker.
• Improper wiring or
installation may cause fire
or electric shock
Do not touch(operate) the
product with wet hands.
• There is risk of fire or
electrical shock.
ENGLISH
If water enters the product, turn
off t
he power switch of the
main
body of appliance. Contact
ser vice center after taking the
power-plug out from the socket.
Owner’s Manual 5
Safety Precautions
■ Installation
Do not plug or unplug the
power supply plug during
operation.
• There is risk of fire or
electric shock.
Do not damage or use an
unspecified power cord.
• It will cause electric shock or
fire.
Do not operate with wet
hands or in damp
environment.
• It will cause electric shock.
Take care to ensure that power
cable could not be pulled out
or damaged during operation.
• There is risk of fire or
electric shock.
When gas leaks, open the
window for ventilation
before operating the unit.
• Otherwise, it may cause
explosion, and a fire.
Never touch the metal parts
of the unit when removing
the filter.
• They are sharp and may
cause injury.
Install the product so that the noise or hot
wind from the outdoor unit may not cause
any damage to the neighbors.
• Otherwise, it may cause dispute with the
neighbors.
Keep level parallel in installing the product.
• Otherwise, it may cause vibration or water
leakage.
ENGLISH
6 Room Air Conditioner
Safety Precautions
■ Operation
Be cautious not to touch the
sharp edges when
installing.
• It may cause injury.
Avoid excessive cooling and
perform ventilation
sometimes.
• Otherwise, it may do harm to
your health.
Do not insert the hands or
bars through the air inlet or
outlet during operation.
• Otherwise, it may cause
personal injury.
Do not put a pet or house
plant where it will be
exposed to direct air flow.
• It may cause injury.
Do not block the inlet or
outlet of air flow.
• It may cause product failure.
Use a soft cloth to clean. Do
not use wax, thinner, or a
strong detergent.
• The appearance of the air
conditioner may deteriorate,
change color, or develop
surface flaws.
Do not step on the
indoor/outdoor unit and do
not put anything on it.
• It may cause an injury
through dropping of the unit
or falling down.
Always insert the filter
securely.
Clean it every two weeks.
• Operation without filters will
cause failure.
Do not drink water drained
from air conditioner.
• It contains containments and
will make you sick.
ENGLISH
Owner’s Manual 7
Before to Operation
Before Operation
1. Contact an installation specialist for installation.
2. Plug in the power plug properly.
3. Use a dedicated circuit.
4. Do not use an extension cord.
5. Do not start/stop operation by plugging/unplugging the power cord.
6. If the cord/plug is damaged, replace it with only an authorized replacement
part.
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.
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.
Preparing for Operation
Usage
Cleaning and Maintenance
Service
ENGLISH
8 Room Air Conditioner
Introduction
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that could cause harm to
the air conditioner.
This symbol indicates special notes.
This appliance should be installed in accordance with the National Electric Code.
Vertical Air Deflector
(Horizontal Louver)
Horizontal Air Deflector
(Vertical Louver)
Air Discharge
Evaporator
Control Board
Evaporator
Control Board
Condenser
Base Pan
Brace
Brace
Cabinet
Front Grille Air Filter
Air Intake(Inlet Grille)
Vertical Air Deflector
(Horizontal Louver)
Horizontal Air Deflector
(Vertical Louver)
Air Discharge
Cabinet
Front Grille Air Filter
Remote Controller
Air Intake(Inlet Grille)
Condenser
Base Pan
Compressor
Power Cord
Introduction
Symbols Used in this Manual
Features
Vertical Air Deflector
(Horizontal Louver)
0DQXDO7\SH
Horizontal Air Deflector
(Vertical Louver)
ENGLISH
0LFRP7\SH