LG PC12ST User manual

www.lg.com
OWNER’S MANUAL
Copyright © 2021 - 2022 LG Electronics Inc. All Rights Reserved
TYPE: WALL MOUNTED
Original instruction
MFL69780820
Rev.00_062422
Read this owner's manual thoroughly before operating the
appliance and keep it handy for reference at all times.
AIR CONDITIONER
EN ENGLISH
DE DEUTSCH
PL POLSKI
CZ ČEŠTINA
SK SLOVENČINA
LT LIETUVIŲ
MK МАКЕДОНСКИ
IT ITALIANO
EL ΕΛΛΗΝΙΚΑ
HU MAGYAR
ET EESTI
SL SLOVENŠČINA
GA GAEILGE
SQ SHQIP
ES ESPAÑOL
PT PORTUGUÊS
BG БЪЛГАРСКИ
MT MALTI
LV LATVIEŠU
SR SRPSKI
BS BOSANSKI
FR FRANÇAIS
NL NEDERLANDS
HR HRVATSKI
RO ROMÂNĂ
LG Electronics Inc. Single Point of Contact (EU/UK) :
LG Electronics European Shared Service Center B.V.
Krijgsman 1, 1186 DM Amstelveen, The Netherlands

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
OPERATION ....................................................................... 12
Notes for Operation ..............................................................................12
Parts and Functions..............................................................................12
Wireless Remote Control......................................................................13
Restarting the Air Conditioner Automatically ........................................18
Using the Mode Function......................................................................18
Using the Jet Mode Function................................................................21
Using the Fan Speed Function.............................................................22
Using the Air Flow Direction Function...................................................22
Setting the On/Off Timer.......................................................................23
Using the Sleep Function (Optional).....................................................24
Using the Simple Timer Function (Optional).........................................24
Using the Energy Display Function (Optional)......................................25
Using the Light Off Function (Optional) ................................................25
Using the Comfort Air Function (Optional)............................................25
Using the Energy Control Function (Optional)......................................26
Using UVnano Function (Optional).......................................................26
Using Special Functions.......................................................................27
SMART FUNCTIONS......................................................... 29
LG ThinQ Application............................................................................29
Smart Diagnosis ...................................................................................31
MAINTENANCE.................................................................. 32
Clean the Air Filter................................................................................34
Clean the Allergy Filter (Optional).........................................................35
TROUBLESHOOTING ....................................................... 36

3
SAFETY INSTRUCTIONS EN
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. (for R32)
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.
For use in Europe:
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.
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.

5
EN
•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.
•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. (for
R32)
•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.