Please read this manual carefully before operating
your set and retain it for future reference.
TYPE : WALL MOUNTED
*MFL67643001*
P/NO : MFL67643001
www.lg.com
2
TIPS FOR SAVING ENERGY
ENGLISH
TIPS FOR SAVING ENERGY
Here are some tips that will help you minimize the power consumption when you use the air
conditioner. You can use your air conditioner more efficiently by referring to the instructions
below:
• Do not cool excessively indoors. This may be harmful for your health and may consume more
electricity.
• Block sunlight with blinds or curtains while you are operating the air conditioner.
• Keep doors or windows closed tightly while you are operating the air conditioner.
• Adjust the direction of the air flow vertically or horizontally to circulate indoor air.
• Speed up the fan to cool or warm indoor air quickly, in a short period of time.
• Open windows regularly for ventilation as the indoor air quality may deteriorate if the air conditioner is used for many hours.
• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block
the air flow or weaken the cooling / dehumidifying functions.
For your records
Staple your receipt to this page in case you need it to prove the date of purchase or for warranty
purposes. Write the model number and the serial number here:
Model number :
Serial number :
You can find them on a label on the side of each unit.
Dealer’s name :
Date of purchase :
SAFETY PRECAUTIONS
IMPORTANT SAFETY INSTRUCTIONS
READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.
Always comply with the following precautions to avoid dangerous situations and ensure peak
performance of your product
WARNING
It can result in serious injury or death when the directions are ignored
CAUTION
It can result in minor injury or product damage when the directions are ignored
WARNING
• Installation or repairs made by unqualified persons can result in hazards to you and others.
• Installation MUST conform with local building codes or, in the absence of local codes, with
the Nation Electrical Code NFPA 70/ANSI C1-1003 or current edition and Canadian Electrical
Code Part1 CSA C.22.1.
• The information contained in the manual is intended for use by a qualified service technician
familiar with safety procedures and equipped with the proper tools and test instruments.
• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property damage, personal injury and/or death.
Installation
• Use a standard circuit breaker and fuse conforming with the rating of the air conditioner. Failure to do so may result in electric shock or product failure.
• Contact an authorized service center when you install or relocate the air conditioner. Failure to
do so may result in serious injury or product failure.
• Always use a power plug and socket with a ground terminal.Failure to do so may result in
electric shock or product failure
• Install the panel and the cover of the control box safely. Failure to do so may result in explosion or fire.
• Install a dedicated electric outlet and circuit breaker before you use the air conditioner. Failure
to do so may result in electric shock or product failure.
• Use a standard circuit breaker and fuse conforming with the rating of the air conditioner. Failure to do so may result in electric shock or product failure.
• Do not modify or extend the power cable. If the power cable or cord has scratches or skin
peeled off or deteriorated then it must be replaced. It may result in fire or electric shock.
• Be cautious when you unpack or install the air conditioner. Failure to do so may result in serious injury or product failure.
• Contact an authorized service center when you install or relocate the air conditioner. Failure to
do so may result in serious injury or product failure.
• Do not install the air conditioner on an unstable surface or where there may be a danger of it
falling. It may result in death, serious injury, or product failure.
!
!
!
3
ENGLISH
4
SAFETY PRECAUTIONS
ENGLISH
Operation
• Do not let the air conditioner run for a long time when the humidity is very high or when a door or
window has been left open. Failure to do so may result in product failure.
• Make sure that the power cord is not pulled or damaged while the air conditioner is operating. Failure to do so may result in fire, electric shock, or product failure.
• Do not place any objects on the power cord. It may result in electric shock or product failure.
• Do not turn on or off the air conditioner by plugging in or unplugging the power plug. It may result in
fire or electric shock.
• Do not touch, operate or repair the air conditioner with wet hands. It may result in electric shock or
product failure.
• Do not place a heater or other heating appliances near the power cable. It may result in fire, electric
shock, or product failure.
• Do not allow water to run into the air conditioner. It may result in explosion or fire.
• Do not leave flammable substances such as gasoline, benzene and thinner near the air conditioner.
It may result in explosion or fire.
• Do not use the air conditioner for an extended period of time in a small place without ventilation.
Ventilate the place regularly. Failure to do so may result in explosion or fire.
• When there is a gas leak, ventilate sufficiently before using the air conditioner again. Failure to do so
may result in explosion or fire.
• Unplug the power plug if there is a noise, smell or smoke coming from the air conditioner. Failure to
do so may result in explosion or fire.
• Stop operating and close the window in strom or hurricane.If possible remove the product from the
window before hurricane arrives
• Do not touch the electrostatic filter after opening the front grille. Failure to do so may result in electric shock or product failure.
• Contact an authorized service center when the air conditioner is submerged into water due to flooding. Failure to do so may result in explosion or fire.
• Be cautious water could not enter the product
• Make sure to ventilate sufficiently when this air conditioner and a heating appliance such as a heater
are used simultaneously. Failure to do so may result in fire, serious injury, or product failure.
• Turn the main power off and unplug the power plug when you clean or repair the air conditioner.
Failure to do so may result in death, serious injury, or product failure.
• Unplug the power plug when the air conditioner is not used for an extended period of time. Failure
to do so may result in product failure.
• Do not place any objects on the air conditioner. It may result in product failure.
• For inner cleaning, contact an Authorized Service Center or a dealer.
Do not use harsh detergent that causes corrosion or damage on the unit.
Harsh detergent may also cause failure of product, fire, or electronic shock.
SAFETY PRECAUTIONS
CAUTION
Installation
• Make sure to check if there is a refrigerant leak after you install or repair the air conditioner. Failure
to do so may result in product failure.
• Install the drain hose properly for smooth drainage of condensed water. Failure to do so may result
in product failure.
• Keep level even when installing the product.
• Install the air conditioner where the noise from the outdoor unit or the exhaust gas will not inconvenience the neighbors. Failure to do so may result in conflict between neighbors.
• When transporting the equipment, there should be at least 2 or more people, or a forklift. It may result in serious injury.
• Do not install the air conditioner where it will be exposed to sea wind (salt spray) directly. It may result in product failure.
Operation
• Do not expose people, animals or plants to the cold or hot wind from the air conditioner. It may result in serious injury.
• 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. It may result in death, fire or electric
shock.
• Do not block the inlet or outlet of air flow. It may result in explosion or product failure.
• Do not use strong cleaning agents or solvents when you clean the air conditioner, or spray water.
Use a smooth cloth. It may result in serious injury or product failure.
• Never touch the metal parts of the air conditioner when you remove the air filter. It may result in serious injury or product failure.
• Do not place any objects on the air conditioner. It may result in product failure.
• Always insert the filter securely after cleaning. Clean the filter every two weeks or more often if
necessary.
• Do not insert hands or other objects through the air inlet or outlet while the air conditioner is operating. It may result in electric shock.
• Do not drink the water drained from the air conditioner. It may result in serious health complications.
• Use a sturdy stool or ladder when you clean, maintain or repair the air conditioner at a height. Failure
to do so may result in serious injury or product failure.
• Do not mix the batteries for the remote control with other types of batteries or mix new batteries
with used batteries. Failure to do so may result in product failure.
• Do not recharge or disassemble the batteries. Failure to do so may result in explosion, fire or serious
injury.
• Stop using the remote control if there is a battery fluid leak. If your cloth or skin is exposed to the
battery fluid from a leak, wash it off with clean water. Failure to do so may result in serious injury.
• If you swallow the battery fluid from a leak, wash out the inside of your mouth thoroughly and then
consult a doctor. Failure to do so may result in serious health complications.
!
5
ENGLISH
TABLE OF CONTENTS
2
TIPS FOR SAVING ENERGY
3IMPORTANT SAFETY
INSTRUCTIONS
7BEFORE USE
7Components
8Using the remote control
9- Inserting batteries
9- Installing the remote control holder
10 BASIC FUNCTIONS
10Cooling your room
10Removing humidity
11Airing your room
11Adjusting the fan speed
11Adjusting the air flow direction
11Setting the timer
11- Setting the current time
12- Turning on the air conditioner
automatically at a set time
12- Turning off the air conditioner
automatically at a set time
12- Canceling the timer setting
12Setting sleep mode
13 ADVANCED FUNCTIONS
13Changing room temperature quickly
13Indoor air purification
13- Auto Clean operation
14Auto operation (Optional)
14Auto Changeover operation (Optional)
15Energy saving cooling mode
15Display screen brightness
15°C /°F conversion
15Anti Malaria Operation
16Operating the air conditioner without the
remote control
16Restarting the air conditioner
automatically
17 MAINTENANCE
18Cleaning the air filter
18Cleaning the triple filter (Optional)
19 TROUBLESHOOTING
19Self-diagnosis function
19Before requesting service
TABLE OF CONTENTS
6
ENGLISH
BEFORE USE
Components
BEFORE USE
7
ENGLISH
Indoor unit
Air inlet
Air filter
Front grille
Triple filter (Optional)
Air outlet
Vertical louver
* The feature can be changed according a type of model.
NOTE
!
The number of operation lamps and their locations may vary, depending on the model of the
air conditioner.
Horizontal
vane
Anti Malaria device
ON/OFF button
Operation
lamp
Signal Receiver
Outdoor unit
Air Inlet
Air Outlet
B ase Plate
* The feature can be changed according a type of model.
Connecting
Wires
Piping
Drain Hose
BEFORE USE
8
ENGLISH
Using the remote control
buttons for the additional functions under the cover of the remote control.
Wireless remote control
ON
AM
OFF
hr.
PM
A/CLEAN
E/SAVING
FAN
SPEED
SWING
SLEEP
TIME [3SEC]
TEMP
LIGHT
TIMER
ON
SET
CLEAR
MODE
MODE
ROOM
TEMP
C/ F [5SEC]
OFF
Operation Mode
Cooling Operation
Artificial Intelligence or
Auto changeover
Healthy Dehumidification
Operation
Air Circulation
Control
panel
C
F
Display
screen
123
JET
Control
panel
ON
* Some functions may not be supported, depending on the
Temperature display button: Displays the
room temperature.
Sleep mode auto button : Sets the
sleep mode auto operation.
imer button: Sets the current time and
T
the start / end time.
et/clear button: Sets or cancels func-
S
tions.
es et button: Resets the air condi-
R
tioner settings.
BEFORE USE
9
ENGLISH
Inserting batteries
Insert batteries before using the remote
control. The battery type used is AAA (1.5 V).
1 Remove the battery cover.
2 Insert the new batteries and make sure
that the + and - terminals of the batteries
are installed correctly.
3 Reattach the battery cover.
NOTE
!
If the display screen of the remote control
starts to fade, replace the batteries.
2 Fix the holder by fastening the 2 screws
rmly with a screwdriver.
3 Slide the remote control into the holder.
Operating method
Point the remote control towards the signal
receiver at the bottom of the air conditioner to
operate it.
Installing the remote control holder
Install the holder where there is no direct sunlight to protect the remote control.
1 Choose a safe and easily-accessible place.
NOTE
!
• The remote control may operate other
electronic devices if pointed towards
them. Make sure to point the remote
control towards the signal receiver of
the air conditioner.
• For proper operation, use a soft cloth to
clean the signal transmitter and receiver.
BASIC FUNCTIONS
10
ENGLISH
BASIC FUNCTIONS
Cooling your room
(Cool ing operation)
1 Press to turn on the power.
2 Press repeatedly to select the cooling
3 Press or to set the desired tempera-
MODE
operation.
- is displayed on the display screen.
ture.
- The temperature range is 18°C (64.4°F)30°C (86°F).
Removing humidity
(Dehumidifying operation)
This mode removes excess moisture from an
environment with high humidity or in the rainy
season, in order to prevent mold from setting
in. This mode adjusts the room temperature
and the fan speed automatically to maintain
the optimal level of humidity.
1 Press to turn on the power.
2 Press repeatedly to select the dehu-
MODE
midifying operation.
- is displayed on the display screen.
NOTE
!
• In this mode you cannot adjust the room
temperature, as it is adjusted automatically. Also, the room temperature is not
displayed on the display screen.
BASIC FUNCTIONS
11
ENGLISH
Airing your room
(Air Circulation operation)
This mode only circulates the indoor air
without changing the room temperature. The
cooling lamp lights up in air circulation mode.
1 Press to turn on the power.
2 Press repeatedly to select air circula-
3 Press to adjust the fan speed.
MODE
SPEED
FAN
tion operation.
- is displayed on the display screen.
Adjusting the fan speed
FAN
SPEED
1 Press repeatedly to adjust the fan
speed.
- Select if you want natural air.
The fan speed adjusts automatically.
Adjusting the air flow direction
1
cally,
SWING
tion automatically.
NOTE
!
cause product failure.
• If you restart the air conditioner, it starts
to operate with the previously set direc-
not match the icon displayed on the remote control. When this occurs, press
SWING
again.
Setting the timer
You can use the timer function to save energy
Setting the current time
SET
1 Press and hold it for longer than 3 sec-
CLEAR
onds.
the display screen.
12
ENGLISH
BASIC FUNCTIONS
2 Press or to select the minutes.
SET
3 Press
CLEAR
Turning on the air conditioner automatically at a set time
1 Press .
2 Press or to select the minutes.
3 Press
4 When setting the timer, current time and
ON
the display screen.
SET
CLEAR
ON icon are displayed on the display
screen indicating that the desired time is
set.
Ttomatically at a set time
1 Press .
2 Press or to select the minutes.
3 Press
4 When setting the timer, current time and
OFF
the display screen.
SET
CLEAR
OFF icon are displayed on the display
screen indicating that the desired time is
set.
Canceling the timer setting
SET
CLEAR
Press .
- To cancel all timer settings, press
SET
.
CLEAR
Setting sleep mode
tioner automatically when you go to sleep.
1 Press to turn on the power.
2 Press
3 Press or to select the hour
(up to 7 hours).
4 Press
- is displayed on the display screen in
In the Cooling and Dehumidifying modes,
the temperature increases by 1°C(1.8°F)
after 30 minutes and by a further
1°C(1.8°F) after another 30 minutes for a
more comfortable sleep. The temperature
increases with up to 2°C(3.6°F) from the
preset temperature.
SLEEP
SET
CLEAR
sleep mode.
NOTE
!
ADVANCED FUNCTIONS
ADVANCED FUNCTIONS
13
ENGLISH
vanced functions.
Changing room temperature
quickly
(Jet Cool)
This mode allows you to cool indoor air quickly
in summer or warm it quickly in winter.
1 Press to turn on the power.
2 Press .
JET
MODE
- In jet cooling mode, strong air blows out
at a temperature of 18°C (64.4°F)
-30°C (86°F) for 30 minutes.
NOTE
!
• Powerful Cooling
- C/O Model
Enable in Cooling/Dehumidifying/Fan/
Indoor air purification
Auto Clean operation
In the cooling and dehumidifying operations,
moisture is generated inside the indoor unit.
Use the auto cleaning function to remove
such moisture.
1 Press to turn on the power.
2 Press .
A/CLEAN
- is displayed on the display screen.
ates for 30 minutes and cleans the inside
of the indoor unit.
NOTE
!
Some buttons cannot be used while the
auto cleaning function is in operation.
• This function may not be supported, de-
pending on the model.
14
ENGLISH
ADVANCED FUNCTIONS
Auto operation (Optional)
(Artificial intelligence)
Cooling-only models
In this mode, the fan speed and the temperature adjust automatically, based on the room
temperature.
1 Press to turn on the power.
2 Press repeatedly to select auto opera-
3 Press or to select the desired oper-
MODE
tion.
ation code if the temperature is higher or
lower than the desired temperature.
Code Description
2Cool
1Cool slightly
0Maintain
room
temperature
-1 Heat slightly
-2 Heat
NOTE
!
• In this mode, you cannot adjust the fan
to rotate automatically.
• This function may not be supported, de-
pending on the model.
Auto Changeover operation
(Optional)
This mode changes the operation mode automatically to maintain the set temperature
at ±2°C.
1 Press to turn on the power.
2 Press repeatedly to select the auto
3 Press or to set the desired temper-
4 Press repeatedly to select the fan
MODE
changeover operation.
- is displayed on the display screen.
ature.
- The temperature range is 18°C(64.4°F)
- 30°C.(86°F)
FAN
SPEED
speed.
NOTE
!
This function may not be supported,
depending on the model.
ADVANCED FUNCTIONS
15
ENGLISH
Energy saving cooling mode
This mode minimizes power consumption during cooling and increases the set temperature
to the optimal level for a more comfortable environment.
The temperature automatically sets at
22°C(71.6°F) if ambient temperature is below
22°C(71.6°F).
The temperature maintains if ambient temperature is above 22°C(71.6°F).
1 Press to turn the power on.
2 Press repeatedly to select the cooling
3
This function may not be supported,
depending on the model. In Energy Saving
Cooling Mode, temperature on the display
of the remote controller and air condi-
MODE
operation.
E/SAVING
Press .
- is displayed on the display screen.
NOTE
!
Display screen brightness
You can adjust the brightness of the indoor
unit display screen.
1 Press
LIGHT
NOTE
!
This function may not be supported,
depending on the model.
°C/°F Conversion
The unit converses from °C to °F or from °F
to °C if Room Temperature KEY is pressed for
5 seconds.
Anti Malaria Operation
Anti Malaria is a device to radiate frequency
mosquitoes don’t like.
1 Press Anti Malaria LED Light up on the
display.
!
You can use this function by pressing
without turning the air conditioner on.
At this time a horizontal vane moves and
the fan speed low.
Both the Anti Malaria and the cooling LED
light up while anti Malaria is in operation.
This function may not be supported depending on the model.
NOTE
16
ENGLISH
ADVANCED FUNCTIONS
Operating the air conditioner
without the remote control
You can use the On/O button of the indoor
unit to operate the air conditioner when the
remote control is unavailable. However, the
fan speed is set to high.
1 Open the front grille.
- Lift up both sides of the cover slightly.
* The feature can be changed according a
type of model.
2 Press the On/O button.
ON/OFF
button
* The feature can be changed according a
type of model.
Restarting the air conditioner
automatically
When the air conditioner is turned on again
after a power failure, this function restores the
previous settings. This function is a factory default setting.
Disabling auto restart
1 Open the front grille.
- Lift up both sides of the cover slightly.
* The feature can be changed according a
type of model.
2 Press the On/O button and hold it for 6
seconds.
- The unit will beep twice and the lamp will
blink 4 times.
- For cooling and heating models, the operation mode changes, depending on the
room temperature.
Room temp.Set temp.
Above 21°C
(69.8°F) and
below 24°C
(75.2°F)
Above 24°C
(75.2°F)
- For cooling-only models, the temperature
is set to 22°C (71.6°F).
23°C (73.4°F)
22°C (71.6°F)
Operation
mode
Dehumidifying operation
Cooling
operation
ON/OFF
button
* The feature can be changed according a
type of model.
- To re-enable the function, press the On/
O button and hold it for 6 seconds. The
unit will beep twice and the lamp will
blink 4 times.
NOTE
!
If you press and hold the On/O button
for 3 – 5 seconds instead of 6 seconds,
the unit will switch to the test operation.
In the test operation, the unit blows out
strong air for cooling for 18 minutes and
then returns to the factory default settings.
MAINTENANCE
17
ENGLISH
MAINTENANCE
Clean the product regularly to maintain optimal performance and to prevent possible breakdown.
* This may not be provided, depending on the model.
ItemCleaning intervalCleaning method
Air filter2 weeksSee “Cleaning air filter.”
Anti-allergy filter / Triple filter 3 months
See “Cleaning anti-allergy filter and triple Filter.”
Indoor unit surfaceRegularly
Use a soft, dry cloth. Do not use bleach or
abrasives.
Outdoor unitRegularly
Use steam to clean the heat exchanger coils
and the panel vents (consult with technician).
CAUTION
• Turn off the power and unplug the power cord before you perform any maintenance; otherwise it may cause electric shock.
• Never use water that is hotter than 40°C when you clean the filters. It may cause deformation or discoloration.
• Never use volatile substances when you clean the filters. They may damage the surface of
the product.
!
NOTE
!
• The location and shape of the filters may differ, depending on the model.
• Make sure to clean the heat exchanger coils of the outdoor unit regularly, as dirt collected
in the coils may decrease the operational efficiency or increase energy costs.
* The feature can be changed according a type of model.
Triple FilterAir filter
18
MAINTENANCE
ENGLISH
Cleaning 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 Open the front grille.
- Lift up both sides of the cover slightly.
3 Hold the knob of the air filter, lift it up
slightly and remove it from the unit.
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.
Cleaning the triple filter
(Optional)
1 Turn off the power and unplug the power
cord.
2 Open the front grille and remove the air fil-
ter (see “Cleaning air filter”).
3 Pull out the anti-allergy filter and the triple
filter.
4 Dry the filter in direct sunlight for 2 hours.
* The feature can be changed according a
type of model.
* The feature can be changed according a
type of model.
* The feature can be changed according a
type of model.
NOTE
!
• The location and shape of the filters may
differ, depending on the model.
NOTE
!
• For inner cleaning, contact an Authorized
Service center or a dealer. Do not use
harsh detergent that causes corrosion or
damage on the unit. Harsh detergent
may also cause failure of product, fire, or
electronic shock.
TROUBLESHOOTING
19
ENGLISH
TROUBLESHOOTING
Self-diagnosis function
This product has a built-in self-diagnosis function. If an error occurs, the lamp of the indoor unit
will blink in 2 second intervals. If this occurs, contact your local dealer or service center.
Before requesting service
Please check the following before you contact the service center. If the problem persists, contact
your local service center.
ProblemPossible causesCorrective action
There is a burning smell and
a strange sound coming
from the unit.
-
Turn off the air conditioner, unplug the
power cord and contact the service center.
Water leaks from the indoor
unit even when the humidity
level is low.
The power cord is damaged
or generating excessive
heat.
A switch, a circuit breaker
(safety, ground) or a fuse is
not operated properly.
The air conditioner does not
work.
The air conditioner is
unplugged.
Check whether the power cord is plugged
into the outlet.
A fuse is blown or the
power supply is
blocked.
Replace the fuse or check if the circuit
breaker has tripped.
A power failure has
occurred.
Turn off the air conditioner when a power
failure occurs. When the power is restored,
wait 3 minutes, and then turn on the air
conditioner.
The voltage is too
high or too low.
Check if the circuit breaker has tripped.
The air conditioner
turned off automatically at a preset time.
Press the power button again.
20
TROUBLESHOOTING
ENGLISH
ProblemPossible causesCorrective action
The air conditioner does not
generate cool air.
Air is not circulating
properly.
Make sure that there are no curtains,
blinds or furniture blocking the front of the
air conditioner.
The air filter is dirty.
Clean the air filter once every 2 weeks.
See “Cleaning Air Filter” for more information.
The room temperature is too high.
In summer, it may take some time to cool
indoor air. In this case, select the jet cool
operation to cool indoor air quickly.
Cold air is escaping
from the room.
Make sure that no cold air is escaping
through ventilation points in the room.
The desired temperature is higher than the
set temperature.
Set the desired temperature to a level
lower than the current temperature.
There is a heating
source nearby.
Avoid using a heat generator such as an
electric oven or a gas burner while the air
conditioner is in operation.
Air circulation operation is selected.
In the air circulation operation, air blows
from the air conditioner without cooling or
heating the indoor air. Switch the operation mode to the cooling operation.
It is not possible to adjust
the fan speed.
The auto operation,
jet operation or dehumidifying operation is
selected.
In some operation modes, such as the jet
or dehumidifying operation modes, you
cannot adjust the fan speed. Select an operation mode in which you can adjust the
fan speed.
It is not possible to adjust
the temperature.
The air circulation operation or jet operation is selected.
In some operation modes, such as the air
circulation or jet operation mode, you cannot adjust the temperature. Select an operation mode in which you can adjust the
temperature.
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