LG H12TN4 User manual

www.lg.com
AIR CONDITIONER
Copyright © 2023 LG Electronics Inc. All Rights Reserved
TYPE: WALL MOUNTED
MOT Registration No. : IMKG.241.02.2023
Read this owner's manual thoroughly before operating the
appliance and keep it handy for reference at all times.
OWNER’S MANUAL
EN ENGLISH ID BAHASA INDONESIA
H12TN4
H18TN4

TABLE OF CONTENTS This manual may contain images or content
different from the model you purchased.
This manual is subject to revision by the
manufacturer.
SAFETY INSTRUCTIONS .............................................................. 3
IMPORTANT SAFETY INSTRUCTIONS ..........................................................4
NAMES OF PARTS....................................................................... 11
Indoor Unit....................................................................................................... 11
Outdoor Unit.................................................................................................... 11
INDOOR UNIT DISPLAY...............................................................12
EMERGENCY FUNCTION............................................................13
Emergency Function .......................................................................................13
REMOTE CONTROLLER .............................................................14
Using Wireless Remote Control......................................................................14
Replacement of Batteries................................................................................15
OPERATING INSTRUCTIONS .....................................................16
Cooling Mode..................................................................................................16
Auto Mode (auto changeover / auto operation mode).....................................16
Dry Mode.........................................................................................................17
Heating Mode .................................................................................................17
Fan Mode........................................................................................................18
Fan Speed ......................................................................................................18
Light Off...........................................................................................................19
Jet Mode .........................................................................................................19
Swing Control..................................................................................................20
Energy Saving.................................................................................................21
Dual Sensing...................................................................................................22
Room Temp.....................................................................................................22
Change Celsius to Fahrenheit °C~°F..............................................................22
Setting the Current Time .................................................................................22
Setting the On/Off Timer .................................................................................23
Using the Sleep Function................................................................................24
Using Special Function ...................................................................................24
PROTECTION...............................................................................25
AUTO-RESTART FUNCTION.......................................................25
Auto-Restart Function .....................................................................................25
MAINTENANCE............................................................................26
Air Filters.........................................................................................................26
Cleaning the Heat Exchanger .........................................................................26
End of Season Maintenance...........................................................................26
TROUBLESHOOTING..................................................................27
SPECIFICATION ...........................................................................29

3
EN
SAFETY INSTRUCTIONS
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.
The following symbols are displayed on indoor and outdoor units.
This symbol indicates that this appliance uses a flammable
refrigerant. If the refrigerant is leaked and exposure to an
external ignition source, there is a risk of fire.
This symbol indicates that the Operation Manual should be
read carefully.
This symbol indicates that a service personnel should be
handling this equipment with reference to the Installation
Manual.
This symbol indicates that information is available such as the
Operating Manual or Installation Manual.

4
EN
IMPORTANT SAFETY INSTRUCTIONS
WARNING
To reduce the risk of explosion, fire, death, electric shock,
injury or scalding to persons when using this product, follow
basic precautions, including the following:
Children in the Household
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.
Installation
• Do not install the air conditioner on an unstable surface or in a place
where there is danger of it falling.
• Contact an authorized service center when installing or relocating the
air conditioner.
• Install the panel and the cover of the control box safely.
• Do not install the air conditioner in a place where flammable liquids or
gases such as gasoline, propane, paint thinner, etc., are stored.
• Make sure that the pipe and the power cable connecting the indoor
and outdoor units are not pulled too tight when installing the air
conditioner.
• Use standard circuit breaker and fuse that conform to the rating of the
air conditioner.
• Do not input air or gas into the system except with the specific
refrigerant.

5
EN
• Use non-flammable gas (nitrogen) to check for leak and to purge air;
using compressed air or flammable gas may cause fire or explosion.
• The 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.
• Install dedicated electric outlet and circuit breaker before using the air
conditioner.
• Do not connect the ground wire to a gas pipe, a lightning rod, or a
telephone ground wire.
• Keep any required ventilation openings clear of obstruction.
• Means for disconnection must be incorporated in the fixed wiring in
accordance with the wiring rules.
• Do not install the unit in potentially explosive atmospheres.
Operation
• Be sure to use only those parts listed in the service parts list. Never
attempt to modify the equipment.
• Make sure that children do not climb on or hit the outdoor unit.
• Dispose of the batteries in a place where there is no danger of fire.
• Use only the refrigerant specified on the air conditioner label.
• Cut off the power supply if there is any noise, smell, or smoke coming
from the air conditioner.
• Do not leave flammable substances such as gasoline, benzene, or
thinner near the air conditioner.
• Contact an authorized service center when the air conditioner is
submerged by flood waters.
• Do not use the air conditioner for an extended period of time in a
small place without proper ventilation.

6
EN
• In the event of a gas leak (such as Freon, propane gas, LP gas, etc.)
ventilate sufficiently before using the air conditioner again.
• Be sure to ventilate sufficiently when the air conditioner and a heating
appliance such as a heater are used simultaneously.
• Do not block the inlet or outlet of air flow.
• Do not insert hands or other objects through the air inlet or outlet
while the air conditioner is operating.
• Make sure that the power cable is neither dirty, loose, nor broken.
• Never touch, operate, or repair the air conditioner with wet hands.
• Do not place any objects on the power cable.
• Do not place a heater or other heating appliances near the power
cable.
• Do not modify or extend the power cable. Scratches or peeling
insulation on the power cables may result in fire or electric shock, and
should be replaced.
• Cut off the power supply immediately in the event of a blackout or a
thunderstorm.
• Take care to ensure that power cable could not be pulled out or
damaged during operation.
• Do not touch refrigerant pipe, water pipe and any internal parts while
the unit is operating or immediately after operation.
Maintenance
• Do not clean the appliance by spraying water directly onto the
product.
• Before cleaning or performing maintenance, disconnect the power
supply and wait until the fan stops.

7
EN
Technical Safety
• Installation or repairs made by unauthorized persons can pose
hazards to you and others.
• 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.
• 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.
• The information contained in the manual is intended for use by a
qualified service technician who is familiar with the safety procedures
and equipped with the proper tools and test instruments.
• Failure to read and follow all instructions in this manual can result
in equipment malfunction, property damage, personal injury and/or
death.
• The appliance shall be installed in accordance with national wiring
regulations.
• When the power cord is to be replaced, the replacement work
shall be performed by authorized personnel using only genuine
replacement parts.
• This appliance must be properly grounded to minimize risk of electric
shock.
• Do not cut or remove the grounding prong from the power plug.
• Attaching the earth wire to the power outlet cover screw does not
ground the appliance unless the cover screw is metal, uninsulated,
and the power outlet is grounded through house wiring.

8
EN
• If you have any doubt whether the air conditioner is properly
grounded, have the power outlet and circuit checked by a qualified
electrician.
• The refrigerant and insulation blowing gas used in the appliance
require special disposal procedures. Consult a service agent or a
similarly qualified person before disposing of them.
• If the supply cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualified person in order to
avoid a hazard.
• The appliance shall be stored in a well-ventilated area where the
room size corresponds to the room area as specified for operation.
• The appliance shall be stored in a room without continuously
operating open flames (for example an operating gas appliance) and
ignition sources (for example an operating electric heater).
• The appliance shall be stored so as to prevent mechanical damage
from occurring.
CAUTION
To reduce the risk of minor injury to persons, malfunction, or
damage to the product or property when using this product,
follow basic precautions, including the following:
Installation
• Do not install the air conditioner in an area where it is directly
exposed to sea wind (salt spray).
• Install the drain hose properly for the smooth drainage of water
condensation.
• Exercise caution when unpacking or installing the air conditioner.

9
EN
• Do not touch the leaking refrigerant during installation or repair.
• Transport the air conditioner with two or more people or use a forklift.
• Install the outdoor unit such that it is protected from direct sunlight.
Do not place the indoor unit in a place where it is directly exposed to
sunlight via the windows.
• Safely dispose of packing materials such as screws, nails, plastic bag
or batteries using proper packaging after installation or repair.
• Install the air conditioner in a place where the noise from the outdoor
unit or the exhaust fumes will not inconvenience the neighbors.
Failure to do so may result in conflict with the neighbors.
Operation
• Remove the batteries if the remote control is not to be used for an
extended period of time.
• Make sure that the filter is installed before operating the air
conditioner.
• Be sure to check if there is a refrigerant leak after installing or
repairing the air conditioner.
• Do not place any object on the air conditioner.
• Never mix different types of batteries, or old and new batteries for the
remote control.
• Do not let the air conditioner run for a long time when humidity is very
high or when a door or a window has been left open.
• Stop using the remote control if there is a fluid leak in the battery. If
your clothes or skin are exposed to the leaking battery fluid, wash off
with clean water.
• Do not expose people, animals, or plants to the cold or hot wind from
the air conditioner for extended periods of time.

10
EN
• If the leaking battery fluid has been swallowed, rinse the inside of the
mouth thoroughly and consult a doctor.
• Do not drink the water drained from the air conditioner.
• Do not use the product for special purposes, such as preserving
foods, works of art, and etc. It is an air conditioner for consumer
purposes, not a precision refrigeration system. There is risk of
damage or loss of property.
• Do not recharge or disassemble the batteries.
• 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.
Maintenance
• Never touch the metal parts of the air conditioner when removing the
air filter.
• Use a sturdy stool or ladder when cleaning, maintaining, or repairing
the air conditioner at a height.
• Never use strong cleaning agents or solvents when cleaning the air
conditioner or spray water. Use a smooth cloth.
• To clean the interior, contact an authorized service center or dealer.
Using harsh detergents may cause corrosion or damage to the unit.