ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH PORTUGUESE ∂§§∏¡π∫∞

OWNER’S MANUAL
AIR CONDITIONER
Please read this manual carefully before operating
your set and retain it for future reference.

TYPE : CEILING CONCEALED DUCT- HIGH STATIC

DUTCH
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www.lg.com

P/NO : MFL42803004
 Ceiling Concealed Duct – High Static Type Indoor Unit Ownerʼs Manual

TABLE OF CONTENTS
FOR YOUR RECORDS
Safety Precautions.................3 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.
Operating Instructions...........7
Dealer's Name
Name and Function of Remote Date Purchased
Controller ..............................7 ■ Staple your receipt to this page in the event you need
to prove date of purchase or to issue warranty.

Maintenance and Service ......9

READ THIS MANUAL
Before you Call for
Inside you will find many helpful hints on how to use
Service................................11 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 Indoor Unit
 Safety Precautions

Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be
followed.

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■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified
by the following indications.

WARNING This symbol indicates the possibility of death or serious injury.

CAUTION This symbol indicates the possibility of injury or damage to properties only.

■ Meanings of symbols used in this manual are as shown below.

Be sure not to do.

Be sure to follow the instruction.

WARNING
■ Installation
Do not use a defective or For electrical work, contact the Always ground the product.
underrated circuit breaker. Use dealer, seller, a qualified
this appliance on a dedicated electrician, or an Authorized
circuit. Service Center.
• There is risk of fire or electric • Do not disassemble or repair the • There is risk of fire or electric
shock. product. There is risk of fire or shock.
electric shock.

Install the panel and the cover Always install a dedicated Use the correctly rated breaker
of control box securely. circuit and breaker. or fuse.
• There is risk of fire or electric • Improper wiring or installation • There is risk of fire or electric
shock. may cause fire or electric shock shock.

Do not modify or extend the Do not install, remove, or re- Be cautious when unpacking
power cable. install the unit by yourself and installing the product.
(customer).
• There is risk of fire or electric • There is risk of fire, electric shock, • Sharp edges could cause injury.
shock. explosion, or injury. Be especially careful of the case
edges and the fins on the
condenser and evaporator.

For installation, always contact Do not install the product on a Be sure the installation area
the dealer or an Authorized defective installation stand. does not deteriorate with age.
Service Center.
• There is risk of fire, electric shock, • It may cause injury, accident, or • If the base collapses, the air
explosion, or injury. damage to the product. conditioner could fall with it,
causing property damage,
product failure, and personal
injury.

Ownerʼs Manual 3
Safety Precautions

■ Operation
Do not let the air conditioner Take care to ensure that power Do not place anything on the
run for a long time when the cable could not be pulled out or power cable.
humidity is very high and a damaged during operation.
door or a window is left open.
• Moisture may condense and wet • There is risk of fire or electric • There is risk of fire or electric
or damage furniture. shock. shock.

Do not plug or unplug the Do not touch(operate) the Do not place a heater or other
power supply plug during product with wet hands. appliances near the power
operation. cable.
• There is risk of fire or electric • There is risk of fire or electrical • There is risk of fire and electric
shock. shock. shock.

Do not allow water to run into Do not store or use flammable Do not use the product in a
electric parts. gas or combustibles near the tightly closed space for a long
product. time.
• It may cause There is risk of fire, • There is risk of fire or failure of • Oxygen deficiency could occur.
failure of the product, or electric product.
shock.
When flammable gas leaks, If strange sounds, or small or Stop operation and close the
turn off the gas and open a smoke comes from product. window in storm or hurricane.
window for ventilation before Turn the breaker off or If possible, remove the product
turn the product on. disconnect the power supply from the window before the
cable. hurricane arrives.
• Do not use the telephone or turn • There is risk of electric shock or • There is risk of property damage,
switches on or off. fire. failure of product, or electric
There is risk of explosion or fire shock.

Do not open the inlet grill of the When the product is soaked Be cautious that water could
product during operation. (flooded or submerged), not enter the product.
(Do not touch the electrostatic contact an Authorized Service
filter, if the unit is so equipped.) Center.
• There is risk of physical injury, • There is risk of fire or electric • There is risk of fire, electric shock,
electric shock, or product failure. shock. or product damage.

Ventilate the product from time to time when Turn the main power off when cleaning or
operating it together with a stove, etc. 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, Take care to ensure that nobody could step on or
disconnect the power supply plug or turn off the fall onto the outdoor unit.
breaker.
• There is risk of product damage or failure, or • This could result in personal injury and product
unintended operation. damage.

4 Indoor Unit
 Safety Precautions

CAUTION
n Installation
Always check for gas (refrigerant) leakage Install the drain hose to ensure that Keep level even when installing
after installation or repair of product. water is drained away properly. the product.

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• Low refrigerant levels may • A bad connection may cause • To avoid vibration or water
cause failure of product. water leakage. leakage.

Do not install the product where the noise Use two or more people to lift and Do not install the product where
or hot air from the outdoor unit could transport the product. it will be exposed to sea wind
damage the neighborhoods. (salt spray) directly.
• It may cause a problem for your • Avoid personal injury. • It may cause corrosion on the product.
neighbors. Corrosion, particularly on the condenser
and evaporator fins, could cause product
malfunction or inefficient operation.
n Operation
Do not expose the skin directly Do not use the product for special Do not block the inlet or outlet
to cool air for long periods of purposes, such as preserving foods, of air flow.
time. (Don't sit in the draft.) 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. • It may cause product failure.

Use a soft cloth to clean. Do Do not touch the metal parts of the Do not step on or put anyting
not use harsh detergents, product when removing the air on the product. (outdoor units)
solvents, etc. filter. They are very sharp!
• There is risk of fire, electric • There is risk of personal injury. • There is risk of personal injury
shock, or damage to the plastic and failure of product.
parts of the product.

Always insert the filter securely. Do not insert hands or other objects Do not drink the water drained
Clean the filter every two weeks through the air inlet or outlet while the from the product.
or more often if necessary. product is operated.
• A dirty filter reduces the efficiency of • There are sharp and moving parts • It is not sanitary and could cause
the air conditioner and could cause that could cause personal injury. serious health issues.
product malfunction or damage.

Use a firm stool or ladder when Replace the all batteries in the remote Do not recharge or
cleaning or maintaining the control with new ones of the same disassemble the batteries.
product. type. Do not mix old and new batteries Do not dispose of batteries in a
or different types of batteries. fire.
• Be careful and avoid personal injury. • There is risk of fire or explosion • They may burn or explode.

If the liquid from the batteries gets onto your skin If you eat the liquid from the batteries, brush your
or clothes, wash it well with clean water. Do not teeth and see doctor. Do not use the remote if the
use the remote if the batteries have leaked. batteries have leaked.
• The chemicals in batteries could cause burns or • The chemicals in batteries could cause burns or
other health hazards. other health hazards.

Ownerʼs Manual 5
Prior to operation

Prior to Operation
Preparing for operation
1. Contact an installation specialist for installation.
2. Use a dedicated circuit.

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 Indoor Unit
 Operating Instructions

Operating Instructions
Name and function of wired remote controller(Accessory)

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1. Operation indication screen
2. Set temperature button
• It will set not room temperature but outlet air temperature.
1
3. Fan speed button
10
• Fan Speed have 3 Steps.
9
• Middle and Low step is same
8 2
3 4. ON/OFF button
7
4 5. Opration mode selection button
11 6. Wireless remote controller receiver
12 5 • Some products don't receive the wireless signals.
13 6 7. Air flow button
14 8. Subfunction button
15 9. Function setting button
10. Ventilation button
11. Reservation
12. Up,down,left,right button
• To check the indoor temperature, press button.
13. Room temperature button
• Displays only the room temperature of the remote
Please attach the inform label inside of the door.
controller perception.
Please choose proper language depend on your
country. • There is no control of room temperature.
• In case of fresh air intake unit, displays only the
temperature around remote controller.
14. Setting/Cancel button
15. Exit button

※ Some functions may not be operated and displayed depending on the product type.
※ It will display strange value to the room temperature if wired remote controller is not connected.

Model : PQRCVSL0 (Black Color)

PQRCVSL0QW (White Color)

Ownerʼs Manual 7
Operating Instructions

Name and function of wired remote controller(Optional)

1. VANE ANGLE Button
Used to set each vane angle.
2. FUNCTION SETTING Button
Used to set or clear Auto Clean, Smart Clean,
Electric heater or Individual vane angle control.
3. ON/OFF Button
1 Used to turn on/off the unit.
2 10
4. JET COOL Button
11 Speed cooling operates super high fan speed.
3 12 5. LEFT/RIGHT AIRFLOW Button (OPTIONAL)
Used to set the desired left/right(horizontal)
4 13 airflow direction.
5 6. UP/DOWN AIRFLOW Button
6 14 Used to stop or start louver movement and set
7 the desired up/down airflow direction.
8 15
16 7. ON TIMER Button
Used to set the time of starting operation.
9 17 8. SLEEP TIMER Button
Used to set the time of sleeping operation.
9. SET / CLEAR Button
PQWRCQ0FDB (Cooling only) Used to set/clear the timer.
PQWRHQ0FDB (Heat pump) Used to set the current time(if it input for 3sec.)
10. PLASMA Button (OPTIONAL)
Used to start or stop the plasma-purification
function.
11. ROOM TEMPERATURE SETTING Button
Operation Mode Used to select the room temperature.
12. OPERATION MODE SELECTION Button
Cooling Mode Used to select the operation mode.
13. INDOOR FAN SPEED SELECTION Button
Auto Mode or Auto Changeover Used to select fan speed in four steps low,
medium, high and chaos.
Dehumidification mode 14. ROOM TEMPERATURE CHECKING Button
Used to check the room temperature.
Heating Mode 15. OFF TIMER Button
Used to set the time of stopping operation.
Fan Mode 16. TIMER SETTING(Up/Down)/LIGHT Button
Used to set the timer.
• Cooling Model( ), Heat Pump Model( ) Used to adjust the brightness.(if it is not time
adjust mode)
17. RESET Button
Used to reset the remote controller.

8 Indoor Unit
 Maintenance and Service

Maintenance and Service

CAUTION: Before performing any maintenance, turn off the main power to

ENGLISH
the system.

Grille, Case, and Remote Controller

❏ Turn the system off before cleaning. To clean, wipe with
a soft, dry cloth. Do not use bleach or abrasives.

Air outlet vent Air filters

NOTICE Power supply must be disconnected before
cleaning the indoor unit.
1. Remove the Air filters.
Air Filters ■ Take hold of the tab and pull slightly forward
to remove the filter.
The air filters behind the front grille should be checked and
cleaned once every 2 weeks or more often if neccessary.
CAUTION: When the air filter is
to be removed, do not touch the
metal parts of the indoor unit.
It may cause an injury.

2. Clean dirt from the air filter using a vacuum

cleaner or washing with water.
■ If dirt is conspicuous, wash with a neutral
detergent in lukewarm water.
■ If hot water (50°C or more) is used, it may
■ Never use any of the followings: be deformed.
• Water hotter than 40°C.
Could cause deformation 3. After washing with water, dry well in
and/or discoloration. the shade.
• Volatile substances. ■ Do not expose the air filter to direct
Could damage the sunlight or heat from a fire when drying it.
surfaces of the air SI
N NER
SCO
U RIN G
conditioner. Be
n zene
C LB
A R GER 4. Install the air filter.

Ownerʼs Manual 9
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

When the air conditioner is used again.
a long time.

Operate the air conditioner at the Clean the air filter and install it in the
following settings for 2 to 3 hours. indoor unit.
• Type of operation: Fan operation mode. (Refer to page 9 for cleaning it.)
• This will dry out the internal mechanisms.

Turn off the breaker.

Check that the air inlet and outlet of the
indoor/outdoor unit are not blocked.
CAUTION
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
Helpful information connected to the indoor unit side.

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
closed. uniform.

This is not good for the health Do not let direct sunshine Adjust the vertical and
and wastes electricity. enter the room when the air horizontal airflow direction to
conditioner is in operation. ensure a uniform temperature
in the room.

Make sure that the doors Clean the air filter regularly. Ventilate the room
and windows are shut tight. occasionally.

Avoid opening doors and Blockages in the air filter Since windows are kept
windows as much as possible reduce the airflow and lower closed, it is a good idea to
to keep the cool air in the cooling and dehumidifying open them and ventilate the
room. effects. Clean at least once room now and then.
every two weeks.

10 Indoor Unit
 Maintenance and Service

Before you call for service...

Troubleshooting Tips! Save time and money!
?

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Check the following points before requesting repairs or service.... If the malfunction persists,
please contact your dealer.

The air conditioner The room has a It seems that Air conditioner does
does not operate. peculiar odor. condensation is not operate for about
leaking from the air 3 minutes when
conditioner. restart.

• Have you made a • Check that this is not • Condensation occurs • This is the protector
mistake in timer a damp smell exuded when the airflow from of the mechanism.
operation? by the walls, carpet, the air conditioner • Wait about three
• Has the fuse blown furniture or cloth cools the warm room minutes and
or has the circuit items in the room. air. operation will begin.
breaker been
tripped?

Does not cool or heat The air conditioner Crack sound is Remote control
effectively. operation is noisy. heard. display is faint, or no
display at all.

• Is the air filter dirty? • For a noise that • This sound is generated • Are the batteries
See air filter cleaning sounds like water by the expansion/ depleted?
instructions. flowing. constriction of the front • Are the batteries
• The room may have -This is the sound of panel, etc. due to inserted in the
been very hot when freon flowing inside changes of opposite (+) and (-)
the room air the air conditioner temperature. directions? 
conditioner was first unit.
turned on. Allow time • For a noise that Filter sign lamp
for it to cool down. sounds like the (LED) is ON.
• Has the temperature compressed air
been set incorrectly? releasing into
• Are the indoor unit's atmosphere.
air inlet or outlet vents -This is the sound of • Cleaning the filter,
obstructed? the dehumidifying press the Timer button
water being and ◀ button of wired
processed inside the remote controller at
air conditioning unit. the same time for 3
sec.

NOTICE
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.

Ownerʼs Manual 11
Memo

12 Indoor Unit