OWNER’S MANUAL
AIR CONDITIONER
Please read this manual carefully before operating
your set and retain it for future reference.
TYPE : Ceiling Cassette
P/NO : MFL63741101
www.lg.com
Ceiling Cassette Air Conditioner Ownerʼs Manual
TABLE OF CONTENTS
Safety Precautions.........................3
FOR YOUR RECORDS
Write the model and serial numbers here:
Model #
Prior to Operation ..........................6
Serial #
You can find them on a label on the side of each unit.
Dealer's Name
Introduction ....................................7
Electrical Safety .............................8
Operating Instructions...................9
Maintenance and Service ............21
Date Purchased
n 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.
2 Ceiling Cassette Air Conditioner
Safety Precautions
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.
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 circuit.
• There is risk of fire or electric
shock.
For electrical work, contact
the dealer, seller, a qualified
electrician, or an Authorized
Service Center.
• Do not disassemble or repair the
product. There is risk of fire or
electric shock.
Install the panel and the
cover of control box
securely.
Always install a dedicated
circuit and breaker.
• There is risk of fire or electric
shock.
• Improper wiring or installation
may cause fire or electric shock
Do not modify or extend the
power cable.
• There is risk of fire or electric
shock.
For installation, always contact the
dealer or an Authorized Service Center.
• There is risk of fire, electric
shock, explosion, or injury.
Do not install, remove, or reinstall the unit by yourself
(customer).
• There is risk of fire, electric
shock, explosion, or injury.
Always ground the product.
• There is risk of fire or electric
shock.
Use the correctly rated
breaker or fuse.
• There is risk of fire or electric
shock.
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 evaporator.
Do not install the product on a
defective installation stand.
Be sure the installation area
does not deteriorate with age.
• 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
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
shock.
Do not allow water to run
into electric parts.
• It may cause There is risk of fire,
failure of the product, or 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.
• There is risk of fire or electric
shock.
Do not touch(operate) the
product with wet hands.
Do not place a heater or
other appliances near the
power cable.
• There is risk of fire or electrical
shock.
• There is risk of fire and electric
shock.
Do not store or use flammable
gas or combustibles near the
product.
• There is risk of fire or failure of
product.
When flammable gas leaks,
turn off the gas and open a
window for ventilation
before turn the product on.
If strange sounds, or small or
smoke comes from product. Turn
the breaker off or disconnect the
power supply cable.
• Do not use the telephone or turn
switches on or off.
There is risk of explosion or fire
• There is risk of electric shock 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.)
When the product is soaked
(flooded or submerged),
contact an Authorized
Service Center.
• There is risk of physical injury,
electric shock, or product failure.
Do not place anything on
the power cable.
• There is risk of fire or electric
shock.
Ventilate the product from time to time when
operating it together with a stove, etc.
• There is risk of fire or electric shock.
When the product is not be used for a long
time, disconnect the power supply plug or
turn off the breaker.
• There is risk of product damage or failure, or
unintended operation.
4 Ceiling Cassette Air Conditioner
Do not use the product in a
tightly closed space for a
long time.
• 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 shock.
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 electric shock.
Take care to ensure that nobody could step
on or fall onto the outdoor unit.
• This could result in personal injury and product
damage.
Safety Precautions
n Installation
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
neighbors.
Install the drain hose to
ensure that water is drained
away properly.
• A bad connection may cause
water leakage.
Use two or more people to
lift and transport the
product.
• Avoid personal injury.
Keep level even when
installing the product.
• To avoid vibration or water
leakage.
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.
n Operation
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 health.
Do not block the inlet or
outlet of air flow.
• It may cause product failure.
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.
• There is risk of
damage or
loss of property.
Use a soft cloth to clean.
Do not use harsh
detergents, solvents, etc.
• There is risk of fire, electric shock, or
damage to the plastic parts of the product.
Do not touch the metal parts of
the product when removing the
air filter. They are very sharp!
• There is risk of personal injury.
Do not step on or put
anyting on the product.
(outdoor units)
Always insert the filter securely.
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 product is operated.
• There is risk of personal injury
and failure of product.
• A dirty filter reduces the efficiency of
the air conditioner and could cause
product malfunction or damage.
• There are sharp and moving parts
that could cause personal injury.
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
fire.
• They may burn or explode.
Use a firm stool or ladder
when cleaning or
maintaining the product.
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.
• Be careful and avoid personal
injury.
• 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.
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. 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.
Usage
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 unitʼs power is accidentally triggered on while cleaning inner parts of the unit.
Service
For repair and maintenance, contact your authorized service dealer.
6 Ceiling Cassette Air Conditioner
Introduction
Introduction
Symbols used in this Manual
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that could cause harm to the
air conditioner.
NOTICE�
This symbol indicates special notes.
Features
WARNING
This appliance should be installed in accordance with national wiring regulations.
This guide acts as a guide to help to explain product features.
Anti-bacteria
Anti-bacteria
Air Outlet
Air Inlet
Remote �
Controller
Owner's Manual 7
Electrical Safety
Electrical Safety
WARNING
This appliance must be properly grounded.
To minimize the risk of electric shock, you must alway plug into a grounded oulet.
Preferred method
Ensure proper ground �
exists before use
WARNING
Do not cut or remove the grounding prong from the power wire.
WARNING
Attaching the adapter ground terminal to the wall receptacle cover
screw does not ground the appliance unless the cover screw is
metal and not insulated, and the wall receptacle is grounded
through the house wiring.
WARNING
If you have any doubt whether the air conditioner is properly
grounded, have the wall receptacle and circuit checked by a
qualified electrician.
8 Ceiling Cassette Air Conditioner
Operating Instructions
Operating Instructions
Indoor Unit, Outdoor Unit
Anti-bacteria
Anti-bacteria
Air Outlet
Air Inlet
Remote �
Controller
1⃞ 2⃞ 3⃞
4⃞
5⃞
6⃞
Operation Indication Lamps
1⃞ Forced Operation : Operation procedures when remote control can't be used.
2⃞ Defrost Mode
: Lights up during defrost mode or hot start operation.
(heat pump model only)
3⃞ Timer
: Lights up during timer operation.
4⃞ Signal Receptor : Receives the signal from remote control (signal receiving sound:
two short beeps and one long beep)
Owner's Manual 9
Operating Instructions
Name and Function of Remote Controller(Optional)
1
2
3
9
4
10
5
11
6
12
7
13
8
14
15
1 Operation indication screen
2 Set temperature button
3 Wireless remote controller
Receiver
• Some kind of product can not
receive wireless signal.
4 Ventilation button
5 Operation mode selection
button
6 Sub-function button
7 Function setting button
8 Exit button
9 On/ Off button
10 Room temperature button
11 Fan speed button
12 Air flow button
13 Reservation/ Time setting
button
14 Setting/ Cancel button
15 Up, Down, Left, Right
j Some functions may not be operated and displayed depending on the product type.
Accessory
12V SIG GND
Connection Cable
(1EA, 10m)
Remote controller screw
(4 EA)
10 Ceiling Cassette Air Conditioner
Wired remote controller
installation board
Operating Instructions
Wireless Remote Controller
This air-conditioner is equipped with wireless remote controller basically. But if you want to be available with
wired remote controller, you pay for it.
Signal transmitter
5
6
1
3
4
2
7
11
8
13
14
10
CANCEL
ON
OFF
SET
AUTO CLEAN
9
17
12
16
15
Flip-up door�
1. ON/OFF BUTTON
Used to Turn off/on the unit.
2. OPERATION MODE SELECTION BUTTON
Used to select the operation mode.
3. ROOM TEMPERATURE SETTING BUTTONS
Used to select the room temperature.
4. INDOOR FAN SPEED SELECTOR
Used to select fan speed in four steps
low, medium, high and CHAOS.
5. JET COOL BUTTON
Used to start or stop the speed cooling.
(Speed cooling operates super high fan speed.)
6. CHAOS SWING BUTTON
Used to stop or start louver movement and set the desired up/down
airflow direction.
7. ON/OFF TIMER BUTTONS
Used to set the time of starting and stopping operation.
8. TIME SETTING BUTTONS
Used to adjust the time.
9. TIMER SET/CANCEL BUTTON
Used to set and to cancel the Timer operation.
10. SLEEP MODE AUTO BUTTON
Used to set Sleep Mode Auto operation.
11. AIR CIRCULATION BUTTON
Used to circulate the room air without cooling or heating.
12. ROOM TEMPERATURE CHECKING BUTTON
Used to check the room temperature.
13. PLASMA(OPTIONAL)
Used to start or stop the plasma-purification function.
14. RESET BUTTON
Initialize remote controller.
15. 2nd F Button
Used prior to using modes printed in blue at the bottom of buttons.
16. HORIZONTAL AIRFLOW DIRECTION CONTROL BUTTON (OPTIONAL)
Used to set the desired horizontal airflow direction.
17. AUTO CLEAN BUTTON(OPTIONAL)
Used to set auto clean mode.
CAUTION:of handling the Remote Controller
• Aim at the signal receiver on the wired remote controller so as to operate.
• The remote control signal can be received at a distance of up to about 7m.
• Be sure that there are no obstructions between the remote controller and the signal receptor.
• Do not drop or throw the remote controller.
• Do not place the remote controller in a location exposed to direct sunlight, or near the heating unit, or
any other heat source.
• Block a strong light over the signal receptor with a curtain or etc. so as to prevent the abnormal
operation. (ex:electronic quick start, ELBA, inverter type fluorescent lamp)
NOTE
h The wireless remote controller do not operate the swirl mode.(4Way Type)
h For more details refer to the Wireless Remote Control Accessory manual.
h The actual product can be different from above contents depending upon model type.
Owner's Manual 11
Operating Instructions
How to use the Mode Selection Button
Cooling Operation
1
Press the Start/Stop button.
The unit will respond with beep sound.
2
Open the door on the Remote Controller. To select Cooling
Operation, press the Operation Mode Selection button.
Each time the button is pressed, the operation mode is shifted
in the direction of the arrow.
Cooling
3
ON
Auto
Healthy�
Dehumidification
Heating�
(Heat pump model only)
Set the temperature lower than the room temperature.
The temperature can be set within a range of 18°C~30°C in
1°C.
To raise the temperature
To lower the temperature
4
You can select the fan speed in four stepslow, medium, high, or CHAOS. Each time the
button is pressed, the fan speed mode is
shifted.
Natural wind by the CHAOS logic
o For more fresh feeling, press the Indoor Fan Speed Selector and set CHAOS mode. In this mode, the wind
blows like natural breeze by automatically changing fan speed according to the CHAOS logic.
12 Ceiling Cassette Air Conditioner
Operating Instructions
Auto Operation
1
Press the Start/Stop button.
The unit will respond with beep
sound.
2
Open the door on the Remote Controller. To select Auto
Operation, press the Operation Mode Selection button.
Each time the button is pressed, the operation mode is
shifted in the direction of the arrow.
Cooling
ON
3
Auto
Healthy�
Dehumidification
Heating�
(Heat pump model only)
The temperature and fan speed are automatically set by the
electronic controls based on the actual room temperature. If
you want to change the set temperature, press the Room
Temperature Setting buttons. The set temperature will be
changed considering room temperature.
To raise the temperature
To lower the temperature
DURING AUTO OPERATION:
o You cannot switch the indoor fan speed. It has already been set by the Fuzzy rule.
o If the system is not operating as desired, manually switch to another mode. The system will not
automatically switch from the cooling mode to the heating mode, or from heating to cooling, then you must
set the mode and the desired temperature again.
o During Auto Operation, pressing the chaos swing button makes the horizontal louvers swing up and down
automatically. If you want to stop auto-swing, press the chaos swing button again.
Owner's Manual 13
Operating Instructions
Healthy Dehumidification Operation
1
Press the Start/Stop button.
The unit will respond with beep
sound.
2
Open the door on the Remote Controller. To select Healthy
Dehumidification Operation, press the Operation Mode
Selection button.
Each time the button is pressed, the operation mode is shifted
in the direction of the arrow.
Cooling
3
ON
Auto
Healthy
Heating�
Dehumidification (Heat pump model only)
Set the fan speed. You can select the fan
speed in four steps - low, medium, high, or
CHAOS. Each time the button is pressed,
the fan speed mode is shifted.
NATURAL WIND BY THE CHAOS LOGIC
o For more fresh feeling, press the Indoor Fan Speed Selector and set
CHAOS mode. In this mode, the wind blows like natural breeze by
automatically changing fan speed according to the CHAOS logic.
DURING HEALTHY DEHUMIDIFICATION OPERATION:
o If you select the dehumidification mode on the operation selection button, the A/C starts to run the
dehumidification function, automatically setting the room temp. and air volume to the best condition for
dehumidification based on the sensed room temp.
In this case, the setting temp. is not displayed in the Remote Controller and you are not able to control
the room temp. either.
o During the healthy dehumidification function, the air volume is automatically set according to the
algorithm responding to the current room temp. and makes the room condition healthy and
comfortable even in the high humidity season.
14 Ceiling Cassette Air Conditioner
Operating Instructions
Heating Operation(Heat pump model only)
1
Press the Start/Stop button.
The unit will respond with
beep sound.
2
Open the door on the Remote Controller. To select Heating
Operation, press the Operation Mode Selection button.
Each time the button is pressed, the operation mode is
shifted in the direction of the arrow.
Cooling
3
Auto
Healthy�
Dehumidification
Heating�
(Heat pump model only)
Set the temperature higher than the room temperature.
The temperature can be set within a range of 16°C~30°C in
1°C.
ON
To raise the temperature
To lower the temperature
4
Set the fan speed again. You can
select the fan speed in four steps–low,
medium, high, or CHAOS. Each time
the button is pressed, the fan speed
mode is shifted.
NATURAL WIND BY THE CHAOS LOGIC
o For more fresh feeling than other fan speed, press the Indoor Fan Speed Selector and set to CHAOS
mode. In this mode, the wind blows like natural breeze by automatically changing fan speed according to
the CHAOS logic.
Owner's Manual 15
Operating Instructions
Jet Cool Operation
1
Press the Start/Stop button.
The unit will respond with
beep sound.
2
Press the Jet Cool button to operate the
speed cooling mode and the unit will
operate in super high fan speed on cooling
mode for 30 minutes.
3
To cancel the Jet Cool mode, press the Jet Cool button or
the fan button or the room temperature setting button again
and the unit will operate in high fan speed in cooling mode
or
or
NOTICE�
o During the JET COOL function at any moment, the A/C starts to blow the cool air at
extremely high speed for 30 minutes setting the room temp. automatically to 18°C. It is
especially used to cool the room temperature in the shortest time.
o In order to return to the normal cooling mode from the Jet Cool mode, you just press either
the operation mode selection button, air volume selection or temp. setting button or the
JET COOL button again.
16 Ceiling Cassette Air Conditioner
Operating Instructions
NANO PLASMA Purification Operation (Optional)
1
Press the Start/Stop button.
The unit will respond with beep sound.
2
Open the door on the Remote
Controller. Press the PLASMA air
purifying operation ON/OFF button.
Operation will start when the button
is pressed and stop when the button
is pressed again.
3
Set the fan speed. You can select the fan speed in
four steps-low, medium, high or CHAOS.
Each time the button is pressed, the fan speed
mode is shifted.
h Air purifying operation (PLASMA) is
available in Heating or any other operations.
PLASMA Air Purifying Operation only
If you press the PLASMA button, NANO PLASMA
air purifying operates.
Each time the button (
) is pressed, the fan
speed mode is shifed.
Owner's Manual 17
Operating Instructions
2nd F Operation
1
Press the Start/Stop button.
The unit will respond with
beep sound.
2
Open the door of the Remote Controller and press the 2nd F
button to operate functions printed in blue at bottom of
buttons.
(Check the indication of 2nd function on Remote Controller
display.)
These buttons operate the timer setting as follows:
CANCEL
ON
OFF
SET
CANCEL
ON
OFF
SET
AUTO CLEAN
3
2nd function goes off in a short time automatically or when the
button is pressed again.
For more details refer to the functions in next page.
18 Ceiling Cassette Air Conditioner
Operating Instructions
Additional features
Sleep Mode
1. Press the Sleep Mode Auto button to set the time you want the unit to turn off automatically.
2. The Timer is programmed in one-hour increments by pressing the Sleep Mode Auto button 1 to 7 times.
The sleep mode is available for 1 to 7 times.
To alter the time period in steps of 1 hour, press the Sleep Mode Button while aiming at air conditioner.
3. Make sure the Sleep Mode Auto LED lights up.
To cancel the Sleep Mode, press the sleep Mode Auto button several times until the star
(
) disappears from the operation display.
NOTICE�
The Sleep Mode will be operated at low fan speed (cooling) or medium fan speed (heat pump only) for quiet
sleeping.
IN COOLING MODE: The temperature will automatically rise by 1°C over the next 30 minutes and by 2°C in 1
hour for comfortable sleeping.
Setting the Time
1. Time can be set only when you have pressed the Reset button. If you have just replaced the batteries,
the Reset button should be pressed to reset the time.
2. Press 2nd F button and check if 2nd F icon is on.
3. Press the Time Setting buttons until the desired time is set.
CANCEL
4. Press the Timer SET button.
SET
NOTICE�
Check the indicator for A.M. and P.M.
Owner's Manual 19
Operating Instructions
Delay Start/Pre-Set Stop
1. Make sure the time is set correctly on the Remote Controller display.
2. Press 2nd F button.
3. Press the ON/OFF Timer buttons to turn Timer on or off.
ON
OFF
4. Press the Time Setting buttons until the desired time is set.
CANCEL
5. Press the selected on/off setting by pressing the Timer SET button while aiming the Remote Controller
at the signal receptor.
SET
To cancel the setting the timer.
CANCEL
Press the Timer Cancel button while aiming Remote Controller at the signal receptor.
SET
(The timer lamp on the air conditioner and the display will go out.)
Delay off timer
Delay on timer
Delay off and on timer
Delay on and off timer
Vertical Airflow Direction Control (Optional)
The up/down airflow (Vertical Airflow) can be adjusted by using the remote controller.
1. Press the Start/Stop button to start the unit.
2. Press Chaos Swing button and the louvers will swing up and down.
Press the Chaos Swing button again to set the vertical louver at the desired airflow direction.
NOTICE�
o If you press the CHAOS swing button, the horizontal airflow direction is changed automatically based on the
CHAOS algorithm to distribute the air in the room evenly and at the same time to make the human body feel
more comfortable, as if enjoying a natural breeze.
o Always use the remote controller to adjust the up/down airflow direction. Manually moving the vertical airflow
direction louver by hand, could damage the air conditioner.
o When the unit is shut off, the up/down airflow direction louver will close the air outlet vent of the system.
Air Circulation Mode
Circulates the room air without cooling or heating.
1. Press the Start/Stop button. The unit will respond with a beep.
2. Open the door on the remote controller. Press the Air Circulation button. Close the door on the remote
controller. Now each time that you press the Indoor Fan Speed Selector, the fan speed is shifted from
low to CHAOS and back to low again.
CHAOS Air
Fan speed is on low.
Fan speed is on medium.
Fan speed is on high.
NOTICE�
CHAOS Air economizes power consumption and prevents overcooling. The fan speed is automatically changed from
high to low or vice versa, depending on the ambient temperature.
20 Ceiling Cassette Air Conditioner
Maintenance and Service
Maintenance and Service
CAUTION Before performing any maintenance, turn off the main power to the system.
Indoor Unit
Grille, Case and Remote Control
p Turn the system off before cleanining, To clean, wipe
with a soft, dry cloth. Do not use bleach or abrasives.
NOTICE�
Supply power must be disconnected before cleaning
the indoor unit.
Anti-biofilter
Air�
Intake
Air Outlet
Remote �
Controller
Air Filters
The air filters behind the front grille should be
checked and cleaned once every 2 weeks or more
often if neccessary.
Rack
1 Remove the Air filters.
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.
Air Filter
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
SI
N NER
conditioner.
Be
n zene
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.
SCO
U RIN G
C LB
A R GER
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.
Outdoor Unit
The heat exchanger coils and panel vents of the outdoor unit should be checked regularly. If clogged with dirt or
soot, the heat exchanger and panel vents may be professionally steam cleaned.
NOTICE�
Dirty or clogged coils will reduce the operating efficiency of the system and cause higher operating costs.
Owner's Manual 21
Maintenance and Service
When the air conditioner is not going to be used for a long time.
When air conditioner is not going to be used for a long time.
1. Operate the air conditioner at the following settings for 2 to 3 hours.
• Type of operation: Fan operation mode.(Refer to page 14.)
• This will dry out the internal mechanisms.
2. Turn off the breaker.
CAUTION Turn off the circuit breaker when the air conditioner is not going to be used
for a long time. Dirt may collect and may cause a fire.
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.
When the air conditioner is to be used again.
1. Clean the air filter and install it in the indoor unit.
(Refer to page 26 for cleaning it.)
2. Check that the air inlet and outlet of the indoor/outdoor unit are not blocked.
3. Check that the ground wire is connected correctly. It may be connect to the indoor unit side.
Operation Tips
Do not overcool the room.
Keep blinds or curtains
closed.
This is not good for your health
and wastes electricity.
Do not let direct sunshine enter
the room when the air
conditioner is in operation.
Make sure that the doors
and windows are shut tight.
Clean the air filter regularly.
Avoid opening doors and
Blockages in the air filter
windows as much as possible
reduce the airflow and lower
to keep the cool air in the room. cooling and dehumidifying
effects. Clean at least once
every two weeks.
22 Ceiling Cassette Air Conditioner
Keep the room temperature
uniform.
Adjust the vertical and
horizontal airflow direction to
ensure a uniform temperature
in the room.
Ventilate the room
occasionally.
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 fault persists, please contact
your dealer or service center.
Case
Explanation
See page
The air conditioner does not
operate.
• Have you made a mistake in timer operation?
19~24
• Has the fuse blown or has the circuit breaker
been tripped?
-
The room has a peculiar odor.
• Check that this is not a damp smell exuded by
the walls, carpet, furniture, or cloth items in the
room.
-
It seems that condensation is
leaking from the air
conditioner.
• Condensation occurs when the airflow from the
air conditioner cools the warm room air.
Air conditioner does not
operate for about 3 minutes
when restarted.
• This is the protector of the mechanism.
Does not cool or heat
effectively.
• Is the air filter dirty? See air filter cleaning
instructions.
• Wait about three minutes and operation will
begin.
-
-
21
• The room may have been very hot when the
room air conditioner was first turned on. Allow
time for it to cool down.
The air conditioner operation is
noisy.
• Has the temperature been set incorrectly?
12
• Are the indoor unit's air inlet or outlet vents
obstructed?
-
• For a noise that sounds like water flowing.
-This is the sound of freon flowing inside the air
conditioner unit.
• 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.
-
Remote control display is faint,
or no display at all.
• Are the batteries depleted?
Crack sound is heard.
• This sound is generated by the
expansion/constriction of the front panel, etc.
due to changes of temperature.
-
• Cleaning the filter, press the Timer button and
◀ button of wired remote controller at the same
time for 3 sec.
-
Filter sign lamp (LED) is ON.
• Are the batteries inserted in the opposite (+)
and (-) directions?
-
Owner's Manual 23
Maintenance and Service
Product Specifications
Details of LG serial No.
1
2
3
4
5
6
7
8
9
10
Code
Detail
Code of Model
1
Year
0~9
(Digit)
The last digit of year
ex) 1997 → 7, 2000 → 0
Meaning
2,3
Month
01~12
(Digit)
Month
ex) March → 03, August → 08
4
Nation
A~Z
(Alphabet)
Where manufactured
ex) K → Korea, C → China
5
Product
A~Z
(Alphabet)
ex) A → Airconditioner
6~10
Serial No.
0~9
(Digit)
Main Service Part List
NO
PART NAME
1
COMPRESSOR
2
MOTOR
3
MAIN PCB ASSY
4
REMOCON
5
TRANSFORMER
Production Quantity
H. G. IBRAHIM SHAKER COMPANY, LTD.
SERVICE CENTER
* JEDDAH
→
* RIYADH
* AL-KHOBAR
P. O. BOX 50, JEDDAH 21411 KINGDOM OF SAUDI ARABIA
TEL NO. : 6422952 / 6425527
P. O. BOX 15, RIYADH 11411 KINGDOM OF SAUDI ARABIA
TEL NO. : 4020570
→
P. O. BOX 78, AL-KHOBAR 31952 KINGDOM OF SAUDI ARABIA
TEL NO. : 8943714
24 Ceiling Cassette Air Conditioner
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