Page 1
OWNER’S MANUAL
AIR
CONDITIONER
ENGLISH
FRANCAIS ESPAÑOL
Please read this manual carefully before operating
your set and retain it for future reference.
TYPE : Ceiling Concealed Duct
P/NO : MFL67449212
http://www.lghvac.com
www.lg.com
Page 2
Air Conditioner Owner’s Manual
TABLE OF CONTENTS
Safety Precautions................................3
Product Introduction ............................6
Indoor Units..........................................6
Outdoor Unit.........................................6
Simple Wired Remote Controller..........7
Operating Introductions .......................8
Standard Operation - Cooling Mode ....8
Standard Operation - Heating Mode ....9
Standard Operation - Auto Operation ..9
Standard Operation -
Dehumidification Mode.......................10
Standard Operation - Fan Mode ........11
Function Setting -
Fan Speed Selection..........................12
Function Setting - Room Temperature
Check .................................................13
Function setting - Child Lock..............14
Different mode drive ..........................15
Maintenance and Service ...................16
When the air conditioner is not going
to be used for a long time...................17
Operation Tips....................................17
Before you call for service..................18
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
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 yo ur a ir conditioner properly. Ju st 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 Nat io nal Electri c Code by q ua li fied and
authorized personnel only.
2 Air Conditioner
Page 3
Safety Precautions
WARNING
CAUTION
WARNING
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.
Always ground the product.
• There is a risk of electric shock.
For electrical work, contact the dealer, seller,
a qualified electrician, or an Authorized
Service Center. Do not disassemble or repair
the product by yourself.
• There is risk of fire or electric shock.
Use the correctly rated breaker or fuse.
• There is risk of fire or electric shock.
Do not use a defective or underrated
circuit breaker. Use the correctly rated
breaker and fuse.
• There is risk of fire or electric shock .
Always ground the product as per the
wiring diagram. Do not connect the
ground wire to gas or water pipes
lightening rod or telephone ground wire.
• There is risk of fire or electric shock.
Do not modify or extend the power cable.
If the power cable or cord has scrathes or
skin peeled off or deteriorated then it
must be replaced.
• There is risk of fire or electric shock.
Do not use a multi consent. Always use
this appliance on a dedicated cicuit and
breaker.
• Otherwise it can cause electric shock or fire.
Install the panel and the cover of control
box securely.
• There is risk of fire or electric shock due to
dust , water etc.
For installation, removal or reinstall ,
always contact the dealer or an
Authorized Service Center.
• There is risk of fire, electric shock, explosion,
or injury.
ENGLISH
Do not install the product on a defective
installation stand. Be sure that the
installation area does not deteriorate with
age.
• It may cause product to fall.
Be sure to check the refrigerant to the
used. Please read the label on the product.
• Incorrect refrigerant used can prevent the
normal operation of the unit.
Do not place a heater or other heating
appliances near the power cable.
• There is risk of fire and electric shock.
Never install the outdoor unit on a
moving base or a place from where it
can fall down.
• The falling outdoor unit can cause damage or
injury or even death of a person.
Don't use a power cord, a plug or a loose
socket which is damaged.
• Otherwise it may cause a fire or electrical
shock.
Do not allow water to run into electric
parts. Install the unit away from water
sources.
• There is risk of fire, failure of the product, or
electric shock.
When the product is soaked (flooded or
submerged) in water , contact an
Authorized Service Center for repair
before using it again.
• There is risk of fire or eletric shock.
Do not touch , operate, or repair the
product with wet hands. Hold the plug by
hand when taking out
• There is risk of electric shock or fire.
Do not store or use or even allow
flammable gas or combustibles near the
product.
• There is risk of fire.
Owner's Manual 3
Page 4
Safety Precautions
CAUTION
Indoor/outdoor wiring connections must
be secured tightly and the cable should
be routed properly so that there is no
force pulling the cable from the
connection terminals.
• Improper or loose connections can cause
heat generation or fire.
In outdoor unit the step-up capacitor
supplies high voltage electricity to the
electrical components. Be sure to
discharge the capacitor completely
before conducting the repair work.
• An charged capacitor can cause electrical
shock.
Do not use the product in a tightly closed
space for a long time. Perform ventilation
regularly.
• Oxygen deficiency could occur and hence
harm your health.
Ventilate the product room from time to
time when operating it together with a
stove, or heating element etc.
• Oxygen deficiency can occur and hence harm
your health.
Safely dispose off the packing materials.
Like screws, nails, batteries, broken
things etc after installation or svc and
then tear away and thraw away the plastic
packaging bags.
• Children may play with them and cause
injury.
When installing the unit, use the
installation kit provided with the product.
• Otherwise the unit may fall and cause severe
injury.
Do not open the front grille of the product
during operation. (Do not touch the
electrostatic filter, if the unit is so equipped.)
• There is risk of physical injury, electric shock,
or product failure.
Turn the main power off and unplug the
unit when cleaning or repairing the
product.
• There is risk of electric shock.
Make sure to check that the power cable
plug is not dirty, loose or broken and
then only insert the plug completely.
• Dirty, loose or broken power plug can
cause electric shock or fire.
Be sure to use only those parts which
are listed in the svc parts list. Never
attempt to modify the equipment.
• The use of inappropriate parts can cause an
electrical shock, excessive heat generation or
fire.
If strange sounds, smell or smoke comes
from product.Immediately turn the breaker
off or disconnect the power supply cable.
• There is risk of electric shock or fire.
When the product is not to 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.
Take care to ensure that nobody
especially kids could step on or fall onto
the outdoor unit.
• This could result in personal injury and
product damage.
Do not plug or unplug the power supply plug to turn the unit
ON/OFF .
• There is risk of fire or electric shock.
Two or more people must lift and
transport the product.
• Avoid personal injury.
Keep level even when installing the
product.
• To avoid vibration or noise.
4 Air Conditioner
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 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.
Do not install the product where it will be
exposed to sea wind (salt spray) directly.
• It may cause corrosion on the product.
Do not install the product where the noise
or hot air from the outdoor unit could
damage or disturb the neighborhoods.
• It may cause a problem for your neighbors
and hence dispute.
Do not place ANYTHING on the power
cable.
• There is risk of fire or electric shock.
Install the drain hose to ensure that the
condensed water is drained away properly.
• A bad connection may cause water leakage.
Always check for gas (refrigerant)
leakage after installation or repair of
product.
• Low refrigerant levels may cause failure of
product.
Page 5
Safety Precautions
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.
Do not touch the metal parts of the
product when removing the air filter.
• There is risk of personal injury.
Do not insert hands or other objects
through the air inlet or outlet while the
product is operating.
• There are sharp and moving parts that could
cause personal injury.
Do not tilt the unit when removing or
uninstalling it.
• The condensed water inside can spill .
Dismantling the unit, treatment of the
refrigerant oil and eventual parts should
be done in accordance with local and
national standards.
Do not block the inlet or outlet of air flow.
• It may cause product failure.
Do not step on or put anyting on the
product. (outdoor units)
• There is risk of personal injury and failure of
product.
Be cautious when unpacking and
installing the product.
• Sharp edges could cause injury.
Do not mix air or gas other than the
specified refrigerant used in the system .
• If air enters the refrigerant system, an
excessively high pressure results, causing
equipment damage or injury.
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.
• There is risk of fire or product failure.
Use a soft cloth to clean. Do not use
harsh detergents, solvents or splashing
water etc .
ENGLISH
• There is risk of fire, electric shock, or damage
to the plastic parts of the product.
Always insert the filter securely after
cleaning. Clean the filter every two weeks
or more often if necessary.
• A dirty filter reduces the efficiency.
If the refrigerant gas leaks during the
repair, do not touch the leakaing
refrigerant gas.
• The refrigernat gas can cause frostbite (cold
burn)
If the refrigerant gas leaks during the
installation, ventilate the area immediately.
• Otherwise it can be harmfull for your health.
Do not recharge or disassemble the
batteries. Do not dispose off batteries in
a fire.
• They may burn or explode.
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.
Do not expose your skin or kids or
plants to the cool or hot air draft.
• This could harm to your health.
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 hazard.
Do not drink the water drained from the
product.
• It is not sanitary and could cause serious
health issues.
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.
Use a firm stool or ladder when cleaning,
maintaining or repairing the product at
an height.
• Be careful and avoid personal injury.
Owner's Manual 5
Page 6
Product Introduction
Air filters
Control box
Air intake vents
TEMP
FAN
SPEED
O
PER
MODE
Wired Remote Controller
Refrigerant pipe
Drain hose
Communication cable
Air outlet
vents
Air intake vents
Product Introduction
Here is a brief introduction of the indoor and outdoor units.
Indoor Units
Outdoor Unit
h The figure can be changed according to model.
6 Air Conditioner
Page 7
Simple Wired Remote Controller
TEMP
FAN
SPEED
OPER
MODE
3
4
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Product Introduction
ENGLISH
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3. Fan Speed Button
Used to set desired fan speed.
4. On/Off Function
Operation starts when this button is pressed, and stops when the button is
pressed again.
5.
Mode Selection Check Button
Used to select the operation mode.
• Cooling operation
• Heating operation
• Auto-operation
• Dry (Dehumidification) operation
• Fan operation
MODEL : PQRCVCL0QW
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Owner's Manual 7
Page 8
Operating Introductions
TEMP
FAN
SPEED
OPER
MODE
Cooling operation will begin if you press
the button.
1
If you press the button, the cooling
operation will stop.
4
If you prees the mode button during the
operation, the operation mode will be
changed in the order of cooling,
dry(dehumidification),heating,auto-operation
and fan operation.‘If the product is a
cooling-only model, the operation mode will
be changed in the order of cooling,
dry(dehumidification), auto-operation and fan
operation.
3
Press the temperature button and set the
desired room temperature lower than the
current room temperature.
-
Setting temp range : 18°C~30°C (64°F~86°F)
- If the desired temperature is set higher than
the current room temperature, the cooling
function will not begin and just the blowing
operation will continue.
2
TEMP
A click of the button will increase the
desired temperature by 1°C or 2°F.
A click of the button will decrease the
desired temperature by 1°C or 2°F.
Operating Introductions
Standard Operation - Cooling Mode
It cools the room by comfortable and clean wind.
8 Air Conditioner
Page 9
TEMP
FAN
SPEED
OPER
MODE
If you want to set the heating operation,
press the button. And press the
button.
1
If you press the button, the cooling
operation will stop.
4
If you prees the mode button during the
operation, the operation mode will be
changed in the order of cooling,
dry(dehumidification),heating,auto-operation
and fan operation.
3
Set the desired room temperature higher
than the current room temperature.
-
Setting temp range : 16°C~30°C (60°F~86°F)
- If the desired temperature is set lower than
the current room temperature, the heating
function will not begin.
2
TEMP
A click of the button will increase the
desired temperature by 1°C or 2°F.
A click of the button will decrease the
desired temperature by 1°C or 2°F.
OPER
MODE
NOTE
Standard Operation - Heating Mode
It supplies warm wind to the indoor
Operating Introductions
ENGLISH
What is the three-minute delay function?
It will take time for the product to blow warm air. The delay is to protect the compressor.
The room will be heated with warm air after three minutes when the compressor begins
operation.
Standard Operation - Auto Operation
In this operation mode, the system is automatically operated by the electronic controls.
- You can set the desired temperature between 18°C(64°F) and 30°C(86°F) for Auto Operation mode.
This function properly operates when you use the remote controller matching each model.
Owner's Manual 9
Page 10
Operating Introductions
TEMP
FAN
SPEED
OPER
MODE
After operating the product by pressing
the button, set up the dry
(Dehumidification) by pressing the
button.
1
When the dry operation is selected, “dh” will
be shown on the display window as shown
on the left side.
- The temperature setting can not be
adjusted during operation this mode.
2
Press the button to select airflow rate
[Lo→Med→Hi].
- The initial wind powerfulness of humidity
removal drive is ‘weak’.
3
OPER
MODE
F
AN
S
PEED
Standard Operation - Dehumidification Mode
It removes humidity while air-cooling weakly.
• In rainy season or high humidity climate, it is possible to operate simultaneously dehumidifier and
cooling mode to remove humidity effectively.
• The menu item of wind powerfulness might not be partially selected according to the product.
10 Air Conditioner
Page 11
TEMP
FAN
SPEED
OPER
MODE
After operating the product by pressing
the button, set up the fan operation by
pressing the button.
1
When the dry operation is selected, “Fn” will
be shown on the display window as shown
on the left side.
- The temperature setting can not be
adjusted during operation this mode.
2
Press the button to select airflow rate
[Lo→Med→Hi].
When running ventilation, compressor of
AHU doesn’t work.
3
OPER
MODE
FAN
SPEED
Standard Operation - Fan Mode
It blows the air as it is in the indoor, not the cold wind.
Operating Introductions
ENGLISH
• Ventilation drive does not release cool wind but general fan
• Because it releases the wind that has no temperature difference from the room, it functions to
circulate the inside air.
• The menu item of wind powerfulness might not be partially selected according to the product.
Owner's Manual 11
Page 12
Operating Introductions
TEMP
FAN
SPEED
OPER
MODE
Select the proper fan speed which you want
by pressing the button on the remote
controller.
- If you press the button, the fan speed
will change in the order of [Lo→Med→Hi].
- The initial fan speed is “Hi”.
- If the product is not compatible with the fan
speed Control, it will not function as per
your selection.
1
FAN
S
PEED
Fan Speed Selection in Cooling Operation
Fan Speed Selection in Heating, Dry, Fan
Function Setting - Fan Speed Selection
It blows the air as it is in the indoor, not the cold wind.
12 Air Conditioner
Page 13
Operating Introductions
TEMP
FAN
SPEED
OPER
MODE
When prssing the button of the remote
controller Adjustment section for approx. 3
seconds, the room Temperature will be
indicated for about 5 seconds
Before resuming to the previous display
panel.
In the case of the room temperature display,
the room Temperature can be different in
accordance with the Setting of the remote
controller’s room temperature
Detection selection.
1
FAN
SPEED
Function Setting - Room Temperature Check
ENGLISH
* As the temperature distribution of the remote controller Installation space is not uniform,
slight difference can be Generated between the actually felt temperature and the room
temperature indication of the remote controller.
Owner's Manual 13
Page 14
Operating Introductions
TEMP
FAN
SPEED
OPER
MODE
During the operation, when pressing the
button and button for approx. 3 seconds,
the ‘Child Lock’ Function can be used.
-
At the time of initial setting of the ‘Child Lock’,
the ‘CL’ Will be indicated approx. 3 seconds
at the temperature Display section before
resuming to the previous mode.
After the setting of the ‘CL’, if another button
is setup, the button can not be recognized as
the ‘CL’ is indicated at the temperature
display section for approx. 3 seconds.
1
If the ‘CL’ function is wanted to be used
under the operation standby state, press the
button and Button for approx.
3 seconds under the standby mode state and
the system will be the ‘CL’ state.
2
As for the releasing method, when pressing
the Button and button for approx. 3
seconds, the ‘CL’ function can be released.
3
FAN
SPEED
FAN
SPEED
FAN
SPEED
Function setting - Child Lock
It is the function to use preventing children or others from careless using.
14 Air Conditioner
Page 15
Operating Introductions
If one indoor unit operate heating mode while
several indoor units are operating cooling
mode, outdoor segment and cooling segment
are blinking like display on the left.
=> It means operation of cooling mode in
outdoor unit.
1
If one indoor unit operate cooling or
dehumidification mode while several indoor
units are operating heating mode, outdoor
segment and cooling segment are blinking.
=> It means operation of heating mode in
outdoor unit.
2
If pressing button, indoor unit
automatically runs at the mode that different
indoor units are running after about 5
seconds and operates.
3
TEMP
FAN
SPEED
OPER
MODE
Different mode drive
Different mode drive is a phenomenon taking place when indoor units' drive mode is different in the
case that a few indoor units are set up at one AHU.
(Different mode drive doesn't show up at cooling exclusive model.)
ENGLISH
• If the product is not compatible with the different mode operation, LCD will be displayed
‘CH07’.
• If ‘CH07’ is displayed, please change the mode.
• Different mode operation is not error.
Owner's Manual 15
Page 16
Maintenance and Service
NOTE
Air outlet vent
Air filters
Air outlet vent
B
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Maintenance and Service
CAUTION: Before performing any maintenance, turn off the main power to
the system.
Grille, Case, and Remote Controller
o Turn the system off before cleaning. To clean, wipe with
a soft, dry cloth. Do not use bleach or abrasives.
Power supply must be disconnected before
cleaning the indoor unit.
Air Filters
The air filters behind the front grille should be checked and
cleaned once every 2 weeks or more often if neccessary.
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
conditioner.
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.
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 (40°C or more) is used, it may
be deformed.
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.
16 Air Conditioner
Page 17
Maintenance and Service
CAUTION
CAUTION
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.
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.
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.
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
When the air conditioner is to be used again.
Clean the air filter and install it in the
indoor unit.
Check that the air inlet and outlet of the
indoor/outdoor unit are not blocked.
Check that the ground wire is
connected correctly. It may be connect
to the indoor unit side.
ENGLISH
Do not overcool the room.
This is not good for the health
and wastes electricity.
Make sure that the doors
and windows are shut tight.
Avoid opening doors and
windows as much as possible
to keep the cool air in the
room.
Keep blinds or curtains
closed.
Do not let direct sunshine
enter the room when the air
conditioner is in operation.
Clean the air filter regularly.
Blockages in the air filter
reduce the airflow and lower
cooling and dehumidifying
effects. Clean at least once
every two weeks.
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.
Owner's Manual 17
Page 18
Maintenance and Service
?
NOTE
Before you call for 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
conditioner.
Air conditioner does
not operate for about
3 minutes when
restart.
• Have you made a
mistake in timer
operation?
• Has the fuse blown
or has the circuit
breaker been
tripped?
Does not cool or heat
effectively.
• Is the air filter dirty?
See air filter cleaning
instructions.
• 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
obstructed?
• Check that this is not
a damp smell exuded
by the walls, carpet,
furniture or cloth
items in the room.
The air conditioner
operation is noisy.
• 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.
• Condensation occurs
when the airflow from
the air conditioner
cools the warm room
air.
Crack sound is
heard.
• This sound is
generated by the
expansion/ constriction
of the front panel, etc.
due to changes of
temperature.
Filter sign lamp is
ON.
• Cleaning the filter,
press the Timer
button and ◀ button
of wired remote
controller at the same
time for 3 sec.
• This is the protector
of the mechanism.
• Wait about three
minutes and
operation will begin.
Remote control
display is faint, or no
display at all.
• Are the batteries
depleted?
• Are the batteries
inserted in the
opposite (+) and (-)
directions?
WATER RESISTANT: The outdoor side of this appliance is WATER RESISTANT.
18 Air Conditioner
The indoor side is not water resistant and should not be exposed to
excess water.
Page 19
US
1. Please call the installing contractor of your product, as warranty service will be provided by them.
2. If you have service issues that have not been addressed by the contractor, please call 1-888-865-3026.
CANADA
Service call Number # : (888) LG Canada, (888) 542-2623
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