Please read this manual carefully before operating
your set and retain it for future reference.
OWNER’S MANUAL
AIR
CONDITIONER
www.lg.com
Copyright © 2014 - 2020 LG Electronics Inc. All Rights Reserved.
MFL68686404
Rev.03_033120
ENGLISH
ESPAÑOL
PORTUGUÊS
Table of Contents
TABLE OF CONTENTS
3 SAFETY INSTRUCTIONS
7 PRIOR TO OPERATION
7 Preparing for operation
7 Usage
7 Cleaning and maintenance
7 Service
7 OPERATING INSTRUCTIONS
7 Auto Restart Function
8 MAINTENANCE AND SERVICE
8 Ceiling Cassette - 4Way
9 Ceiling Cassette - Round
10 When the air conditioner is not going to be used for a long time.
10 Operation Tips
11 Before you call for service...
2 Indoor Unit
Safety Instructions
The following symbols are displayed on indoor and outdoor units
Safety Instructions
ENGLISH
Read the precautions in this manual
carefully before operating the unit.
This symbol indicates that the
Operation Manual should be read
carefully.
The following safety guidelines are intended to prevent unforeseen risks or damage from unsafe or
incorrect operation of the appliance.
The guidelines are separated into ‘WARNING’ and ‘CAUTION’ as described below.
This symbol is displayed to indicate matters and operations that can cause risk.
!
Read the part with this symbol carefully and follow the instructions in order to avoid risk.
!
WARNING
This indicates that the failure to follow the instructions can cause serious injury or death.
!
CAUTION
This indicates that the failure to follow the instructions can cause the minor injury or damage to the
product.
!
WARNING
This appliance is filled with flammable
refrigerant (for R32)
This symbol indicates that a service
personnel should be handling this
equipment with reference to the
Installation Manual.
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.
• Always ground the product.
- There is risk of fire or electric shock.
• Install the panel and the cover of control box securely.
- There is risk of fire or electric shock.
• Always install a dedicated circuit and breaker.
- Improper wiring or installation may cause fire or electric shock
• Use the correctly rated breaker or fuse.
- There is risk of fire or electric shock.
• Do not modify or extend the power cable.
- There is risk of fire or electric shock.
• Do not install, remove, or re-install the unit by yourself (customer).
- There is risk of fire, electric shock, explosion, or injury.
• 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.
• For installation, always contact the dealer or an Authorized Service Center.
- There is risk of fire, electric shock, explosion, or injury.
Owner’s Manual 3
Safety Instructions
• Do not install the product on a defective installation stand.
- It may cause injury, accident, or damage to the product.
• Do not turn on the breaker or power under condition that front panel, cabinet, top cover, control box cover are
removed or opened.
- Otherwise, it may cause fire, electric shock, explosion or death.
• Be sure the installation area does not deteriorate with age.
- If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and
personal injury.
• Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress air or
Oxygen and Do not use Flammable gases. Otherwise, it may cause fire or explosion.
- There is the risk of death, injury, fire or explosion.
• The appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as
specified for operation. (for R32)
• Ducts connected to an appliance shall not contain an ignition source. (for R32)
• The appliance shall be stored in a room without continuously operating ignition sources (for example: open
flames, an operating gas appliance or an operating electric heater.)
• Keep any required ventilation openings clear of obstruction.
Operation
• Take care to ensure that power cable could not be pulled out or damaged during operation.
- There is risk of fire or electric shock.
• Do not place anything on the power cable.
- There is risk of fire or electric shock.
• Do not touch(operate) the product with wet hands.
- There is risk of fire or electrical shock.
• Do not place a heater or other appliances near the power cable.
- There is risk of fire and 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.
• Do not store or use flammable gas or combustibles near the product.
- There is risk of fire or failure of product.
• Do not use the product in a tightly closed space for a long time.
- Oxygen deficiency could occur.
• 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.
• If strange sounds, smell or smoke comes from product. Turn the breaker off or disconnect the power supply
cable.
- There is risk of electric shock or fire.
• 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.
• Do not open the inlet grill 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.
• When the product is soaked (flooded or submerged), contact an Authorized Service Center.
- There is risk of fire or electric shock.
• Be cautious that water could not enter the product.
- There is risk of fire, electric shock, or product damage.
• Ventilate the product from time to time when operating it together with a stove, etc.
- There is risk of fire or electric shock.
• 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.
4 Indoor Unit
Safety Instructions
• 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 turn on the breaker or power under condition that front panel, cabinet, top cover, control box cover are
removed or opened.
- Otherwise, it may cause fire, electric shock, explosion or death.
!
CAUTION
ENGLISH
Installation
• Always check for gas (refrigerant) leakage after installation or repair of product.
- Low refrigerant levels may cause failure of product.
• Install the drain hose to ensure that water is drained away properly.
- A bad connection may cause water leakage.
• Keep level even when installing the product.
- To avoid vibration or water leakage.
• Use two or more people to lift and transport the product.
- Avoid personal injury.
• Any person who is involved with working on or breaking into a refrigerant circuit should hold a current valid
certificate from an industry accredited assessment authority, which authorizes their competence to handle
refrigerants safely in accordance with an industry recognized assessment specification. (for R32)
• The appliance shall be stored so as to prevent mechanical damage from occurring.
• 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.
• If anyone other than a licensed professional installs, repairs, or alters LG Electronics air conditioning products,
the warranty is voided.
- All costs associated with repair are then the full responsibility of the owner.
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 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 block the inlet or outlet of air flow.
- It may cause product failure.
• 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 anything on the product. (outdoor units)
- There is risk of personal injury and failure of product.
• Always insert the filter securely. Clean the filter every two weeks or more often if necessary.
- A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage.
• Do not insert hands or other objects through the air inlet or outlet while the product is operated.
- 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.
• Use a firm stool or ladder when cleaning or maintaining the product.
- Be careful and avoid personal injury.
Owner’s Manual 5
Safety Precautions
• Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair
requiring the assistance of other skilled personnel shall be carried out under the supervision of the person
competent in the use of flammable refrigerants. (for R32)
• This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental
capabilities or lack of experience and knowledge, unless they have been given supervision or instruction
concerning use of the appliance by a person responsible for their safety.
- Children should be supervised to ensure that they do not play with the appliance.
• This appliance can be used by children aged from 8 years and above and persons with reduced physical,
sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or
instruction concerning use of the appliance in a safe way and understand the hazards involved.
Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without
supervision.
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
• Do not touch refrigerant pipe and water pipe or any internal parts while the unit is operating or immediately after
operation.
- It can cause a burn or frostbite.
6 Indoor Unit
Prior to Operation & Operating Instructions
ENGLISH
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 unit’s power is
accidentally triggered on while cleaning inner parts of the unit.
Service
For repair and maintenance, contact your authorized service dealer.
Operating Instructions
Auto Restart Function
In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate
procedures automatically to the previous operating conditions.
Owner’s Manual 7
Maintenance and Service
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Air Filter
Rack
Maintenance and Service
Ceiling Cassette - 4Way
!
CAUTION
Before performing any maintenance, turn off the main power to the system.
Grille, Case, and Remote Control
o Turn the system off before cleaning. To clean, wipe with
a soft, dry cloth. Do not use bleach or abrasives.
NOTICE
Air Filters
The air filters behind the front grille should be checked and
cleaned once every 2 weeks or more often if necessary.
Supply power must be disconnected before
cleaning the indoor unit.
Air Outlet
Wired Remote Controller
(Accessory)
Air
Intake
Air Filter
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
conditioner.
8 Indoor Unit
Air
Air Outlet
Intake
Wired Remote Controller
(Accessory)
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 (50 °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.
Maintenance and Service
Air Filter
Air
Intake
Air Outlet
Wired Remote Controller
(Accessory)
Hook
Hook
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Ceiling Cassette - Round
!
CAUTION
Before performing any maintenance, turn off the main power to the system.
Grille, Case, and Remote Control
o Turn the system off before cleaning. To clean, wipe with
a soft, dry cloth. Do not use bleach or abrasives.
NOTE
Supply power 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 necessary.
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.
ENGLISH
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.
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.
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.
Owner’s 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
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.
!
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.
Helpful information
The air filters and your electric 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
closed.
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.
Keep the room temperature
uniform.
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.
10 Indoor Unit
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.
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.
NOTICE
Before you call for service...
Maintenance and Service
ENGLISH
?
The air conditioner
does not operate.
• Have you made a
mistake in timer
operation?
• Has the fuse blown
or has the circuit
breaker been
tripped?
Does not cool or heat
• 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?
Troubleshooting Tips! Save time and money!
Check the following points before requesting repairs or service.... If the malfunction persist,
please contact your dealer.
effectively.
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.
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.
It seems that
condensation is
leaking from the air
conditioner.
• 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.
Air conditioner does
not operate for about
3 minutes when
restart.
• 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.
The indoor side is not water resistant and should not be exposed to
excess water.
Some functions may not be supported, depending on the model.
Owner’s Manual 11
Maintenance and Service
Specifications.
Model Voltage, Hz Max. Current
*RNU05GTR*4 220 V ~ 60 Hz 0.2 A
*RNU07GTR*4 220 V ~ 60 Hz 0.2 A
*RNU09GTR*4 220 V ~ 60 Hz 0.2 A
*RNU09GTRE4 220 V ~ 60 Hz 0.2 A
*RNU09GTRF4 220 V ~ 60 Hz 0.2 A
*RNU12GTR*4 220 V ~ 60 Hz 0.2 A
*RNU15GTR*4 220 V ~ 60 Hz 0.2 A
*RNU15GTQ*4 220 V ~ 60 Hz 0.2 A
*RNU18GTQ*4 220 V ~ 60 Hz 0.2 A
*RNU21GTQ*4 220 V ~ 60 Hz 0.2 A
*RNU24GTP*4 220 V ~ 60 Hz 0.15 A
*RNU28GTP*4 220 V ~ 60 Hz 0.15 A
*RNU30GTP*4 220 V ~ 60 Hz 0.15 A
*RNU36GTN*4 220 V ~ 60 Hz 0.56 A
*RNU42GTM*4 220 V ~ 60 Hz 0.56 A
*RNU48GTM*4 220 V ~ 60 Hz 0.56 A
*RNU54GTM*4 220 V ~ 60 Hz 0.56 A
*RNU24GTBB4 220 V ~ 60 Hz 0.98 A
*RNU28GTBB4 220 V ~ 60 Hz 0.98 A
*RNU30GTBB4 220 V ~ 60 Hz 0.98 A
*RNU36GTAB4 220 V ~ 60 Hz 1.83 A
*RNU42GTAB4 220 V ~ 60 Hz 1.83 A
*RNU48GTAB4 220 V ~ 60 Hz 1.83 A
*RNU24GTYA4 220 V ~ 60Hz 1.97 A
*RNU36GTYA4 220 V ~ 60Hz 1.97 A
*RNU48GTYA4 220 V ~ 60Hz 1.97 A
12 Indoor Unit
* : A, C
Modelo(s): *RNU05GTR*4, *RNU07GTR*4, *RNU09GTR*4,*RNU09GTRE4
*RNU09GTRF4 *RNU12GTR*4, *RNU15GTQ*4,*RNU15GTR*4
*RNU18GTQ*4, *RNU21GTQ*4, *RNU24GTP*4, *RNU28GTP*4
*RNU30GTP*4, *RNU36GTN*4, *RNU42GTM*4, *RNU48GTM*4
*RNU54GTM*4, *RNU24GTBB4, *RNU28GTBB4, *RNU30GTBB4,
*RNU36GTAB4, *RNU42GTAB4, *RNU48GTAB4, *RNU24GTYA4,
*RNU36GTYA4, *RNU48GTYA4
* : A, C
LG Electronics México, S.A de C.V
Sor Juana lnés de la Cruz No. 555
Col. San Lorenzo Industrial
Tlalnepantla de Baz Estado de México C.P.
54033
Tel. 55 5321 1919
Página web http://www.lg.com/mx
※This mark applies to the following products.
※Esta marca se aplica a los siguientes productos.
ARNU24GTPC4, ARNU28GTPC4, ARNU30GTPC4
ARNU36GTNC4, ARNU42GTMC4, ARNU48GTMC4
ARNU54GTMC4, ARNU24GTBB4, ARNU28GTBB4,
ARNU30GTBB4, ARNU36GTAB4, ARNU42GTAB4,
ARNU48GTAB4, ARNU24GTYA4, ARNU36GTYA4,
ARNU48GTYA4
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