LG U9C Series User manual

MFL71825204
Rev.01_020722 Copyright © 2022 LG Electronics Inc. All Rights Reserved
www.lg.com
OWNER’S MANUAL
AIR PURIFIER
Read this owner’s manual thoroughly before operating the
appliance and keep it handy for reference at all times.
U9C Series
EN ENGLISH

ENEN
This manual may contain images or
content different from the model you
purchased. This manual is subject to
revision by the manufacturer.
TABLE OF CONTENTS
SAFETY INSTRUCTIONS ....................................................03
INSTALLATION.....................................................................10
Parts Instruction ........................................................... 10
Unpacking the Appliance.............................................. 14
Installation Location Requirements .............................. 15
Transportation Requirements....................................... 15
OPERATION .........................................................................16
Status Display .............................................................. 16
Control Panel................................................................ 17
Getting Started ............................................................. 21
Using Extra Functions .................................................. 24
SMART FUNCTIONS............................................................28
LG ThinQ Application ................................................... 28
Smart Diagnosis........................................................... 31
MAINTENANCE....................................................................32
Maintaining the Appliance ............................................ 32
Cleaning the Appliance................................................. 33
Maintaining the Filter.................................................... 34
TROUBLESHOOTING..........................................................36
Before Calling for Service............................................. 36
Appliance Specications .............................................. 40
WARRANTY (USA)...............................................................41

03
ENEN
SAFETY INSTRUCTIONS
READ AND SAVE THESE 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 text marked
with this symbol carefully and follow the instructions in
order to avoid risk.
WARNING
This indicates that failure to follow the instructions can
cause serious injury or death.
CAUTION
This indicates that failure to follow the instructions can
cause minor injury or damage to the product.
IMPORTANT SAFETY INSTRUCTIONS
WARNING
To reduce the risk of explosion, re, 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.

04
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Installation
•Do not install the appliance on an uneven or inclined surface.
•Do not install the appliance in an area exposed to direct
sunlight or near heat-generating equipment.
•Do not install the product in a place where combustible gas
may leak or industrial oil or metallic particulates are present.
•Do not allow the appliance to push against the power cord or
plug.
•Do not touch the power plug with wet hands.
•When unplugging the power cord, always pull it by the plug.
•Unplug the appliance during thunder or lightning storms or
when not in use for a long time.
•Do not bend the power cord excessively or place a heavy
object on top of it.
•Do not extend the length of the power cord or alter it.
•Do not use several devices on a multi-socket extension outlet.
•Make the connection securely so that screw in terminals will
not be loosened when the power cord is pulled.
•Make sure that the power cord cannot be be pulled out or
damaged during operation.
•Do not operate any fan with a damaged cord or plug. Discard
fan or return to an authorized service facility for examination
and/or repair.

05
ENEN
•This appliance has a polarized plug (one blade is wider than
the other). To reduce the risk of electric shock, this plug is
intended to t in a polarized outlet only one way. If the plug
does not t fully in the outlet, reverse the plug. If it still does
not t, contact a qualied electrician. Do not attempt to defeat
this safety feature.
•Do not run cord under carpeting. Do not cover cord with throw
rugs, runners, or similar coverings. Do not route cord under
furniture or appliances. Arrange cord away from trafc area
and where it will not be tripped over.
Operation
•If the appliance is immersed in water, stop using it and contact
an LG Electronics Customer Information Center.
•If there is a gas leakage (isobutane, propane, LNG, etc.), do
not touch the product or power plug and ventilate the area
immediately.
•Do not clean the appliance with brushes, cloths or sponges
which are abrasive or made of metal.
•If you detect any abnormal noise, odor or smoke, unplug the
product immediately and contact an LG Electronics Customer
Information Center.
•User Servicing Instructions
- Only an authorized repair person from an LG Electronics
service center should disassemble, repair, or modify the
product.

06
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•Do not use or store re, combustibles (ether, benzene,
alcohol, drugs, propane, butane, combustible spray,
insecticide, air freshener, cosmetics, etc.) or ammable
materials (candles, lamps, etc.) near the product.
•Do not place the power cord under rugs, carpeting or mats.
•Do not allow animals or pets to chew on the power cord.
•Do not move the appliance when it is in operation.
•Do not hit the appliance.
•Do not insert hands or metal objects into the air inlet or outlet.
•Do not install and use broken parts.
•Do not put ammables into the appliance.
•Do not allow children to climb on or play with the appliance.
•Do not place anything on top of the appliance.
•The fan is not a toy. It should not be played with or placed
where young children can reach it.
•Be careful that children do not get their hands caught in the
vanes by putting their hands during the vanes operation.
•This product uses UVnano LED. Do not disconnect or replace
the UVnano LED arbitrarily. LEDs must be replaced only by
LG-approved service providers.
•Harmful UVnano radiation may leak if the device is used in an
unintended way or if the wires are damaged. UVnano radiation,
even in very small amounts, can harm the eyes and skin.
•Be careful not to let any part of your body put on between the
vanes during the vane operation.

07
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•Do not replace the UV Lamp while it is plugged in.
- Skin or eye damage may result from directly viewing the light
produced by the lamp in this apparatus. Always disconnect
power before relamping or servicing. Replace Lamp With
Lamp CUD7GF1B, Manufactured by Seoul Viosys Co.,
LTD.Replace Lamp With Lamp LTPL-G35U275GC-TWA,
Manufactured by Lite-On Technology Corporation.
Maintenance
•Dispose of the packing materials (vinyl, styrofoam, etc.) to
keep them out of reach of children.
•Take care not to injure or pinch yourself when you detach and
reattach parts of the appliance.
•Turn off and unplug the appliance before cleaning it or
replacing the lter.

08
ENEN
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 tilt the appliance to pull or push it when transporting.
•Do not install the appliance in a vehicle, RV, or marine vessel.
•Do not place the appliance near a TV or stereo equipment.
•Do not place the appliance under bright light.
•The appliance must be installed in accordance with national
wiring regulations.
•When moving or storing the appliance, wrap the power cord
around the base of the appliance to prevent personal injury,
damage to the cord or damage to oors.
•Do not place the appliance near curtains.
Operation
•Do not use the product for removal of toxic gas such as
carbon monoxide.
•Do not use the product for ventilation purposes.
•Do not use the appliance for a long time in a region with
unstable voltage.
•Do not place obstacles around the air inlet or outlet.
•For safe use of the appliance, children or others with reduced
mental capabilities need to be closely monitored by a person
who is responsible for their safety.

09
ENEN
•Do not use the product for special purposes such as
preserving plants, precision instruments, artworks, etc.
•Do not operate the appliance with wet hands.
•Do not let the moisture from a humidier directly touch the
appliance.
•Do not use the appliance while it is not in an upright position.
•Do not use the appliance near objects vulnerable to heat.
•Do not use detergents, cosmetics, chemicals, air fresheners,
or disinfectants in the appliance.
•Do not touch any internal parts while the unit is operating or
immediately after operation.
•Use the lter only for its intended purpose.
•The Deodorizing Care lter and True HEPA lter are
assembled together. Do not try to detach them from each
other.
•Do not insert any objects into the Air outlet.
Maintenance
•Do not use strong detergents or solvents to clean the product.
Use a soft cloth to clean.
•Do not clean the appliance with an alkaline detergent.
•Do not wipe the appliance surface using sulfuric acid,
hydrochloric acid or organic solvents (thinner, kerosene etc.)
or attach a sticker on the appliance.
•Do not allow water inside the appliance.
•Do not wash the lter with water.
•Be careful not to damage the ultra-ne lter when cleaning it
with a vacuum cleaner.

ENEN
10
ENEN
INSTALLATION
•The appearance or functions of the appliance may differ depending on the model.
Parts Instruction
Front
Rear

11
ENEN ENEN
Controller
•Sets the product functions.
Vane
•Moves depending on the
operating
mode(Wide/Diffusion/Direct).
- Operates according to the mode
to change the direction of the
wind.
Air Outlet
•It discharges puried air through
the lter.
Display
(Status Display / Remote
Controller Receiver)
•Displays the settings of the
product and the air condition.
Filter
•Minimizes allergens, ne
particulates, possible sources of
sick house syndrome, smog, and
other odors.
Smart Diagnosis
•If the product malfunctions,
use Smart Diagnosis to check
the product status. (See Smart
Diagnosis in Smart Functions)
Sensor
•PM1.0 (particles with a
diameter between 1.0 and 2.5
micrometers) Sensor: Detects the
concentration levels of dust.(You
do not need to clean the sensor
lens separately.)
Product Center Line
•It is the center line of the product.
UVnano LED
(Only models with UVnano
applied)
•Remove the harmful bacteria at
internal fan of the air purier.
Remote Controller Holder
•Attach the remote controller to
store it.
•Attach the rear part of the remote
controller to the location marked
on the product.
Handle
•Use when carrying the product.
Temperature/Humidity Sensor
•Detects temperature and
humidity.
Air Inlet (Cover)
•Air goes into the purier through
the inlet.
•The front and rear covers may be
removed separately.
CAUTION
•Be careful not to stick magnets or metal
objects to the remote controller holder
as it is attached with magnets.
•Be careful that children do not get
caught by putting their hands during the
Vane operation.

12
ENEN
Filter System
Ultra Fine Filter
Deodorizing Care lter
Minimizes odors from the bathroom, cigarettes, food and other common sources.
True HEPA lter
Minimizes PM1.0 and cigarette smoke from the air.
Filter Handle
Use it to remove the lter from the product.
Ultra Fine Filter
Minimizes large particles oating in the air.
CAUTION
•Do not forcefully separate the Deodorizing Care Filter and True HEPA Filter as they
are integrated.
•Do not throw the lter or use it for any other purpose.

13
ENEN
NOTE
•A slight odor may be emitted from the new lter at the beginning after purchase. The
odor will disappear after a day or so of using the product, so you can use it without
worry.
•The frequency of cleaning and lter replacement may vary depending on environment
and usage time.
•Filters may be used for up to 1 year. The more polluted the indoor air, the shorter the
life of the lter.
•If an excessive odor is present in the room, rst ventilate the air to remove the odor,
and then use the air purier to remove the remaining odor.
•If the air purier is used after not having been used for a long time and there is an
odor, you can reduce the odor from the lter by operating it on fan speed 10 step in a
ventilated area.
•The lter may emit an odor when used continuously in a humid environment or where
moisture from a humidier is absorbed into the lter. If odor is generated due to
moisture, dry the lter in sunlight before use.
•Carbon monoxide (CO) is a harmful gas that is mainly introduced from the outside,
and cannot be removed with a lter.
•Keep the windows or doors closed while using the product. However, if you operate
the product for a long time in a closed space, the carbon dioxide concentration may
rise. So be sure to ventilate the indoor regularly.
•The deodorization function of the air purier operates by trapping the odor in the lter.
If you use the product for a long time in a room with excessive odor, the performance
of the lter may decrease signicantly.
Accessories
Remote Controller/Battery
(CR2025, 1 Unit)
Owner’s Manual / Quick Guide Safe Plate

14
ENEN
Unpacking the Appliance
Remove the xing tape and protective vinyl,
packing material product and its lter before
use.
Removing lter vinyl and
packing material
1Remove the product from the
packaging and remove the xing tape
attached to the product.
2Grab the cover and gently pull to
separate it from the appliances.
•The direction with the LG logo on
the product display is the front of the
product.
Display
Air inlet(cover)
3After separating the lter, remove its
protective vinyl.
•When removing the packaged lter,
separate it from the protective vinyl.
4 Install the lter in the product.
•Make sure that the handle is facing
upward.
Handle
5Remove the packing material inserted
at the bottom of the product.
6Insert the tabs at the bottom of the
cover into the slots in the base of the
appliance and close the cover.
CAUTION
•Be sure to remove the vinyl from the lter
before using the product.
•Pay attention to the direction of the lter
when installing the lter.
•Be sure to remove the cushioning material
before using the product.

15
ENEN
Removing vane vinyl
Use the product after removing the vane vinyl.
1
Operating product.
2
Press Mode button and select
Diffusion Mode.
3
After vanes come out, grasp the vinyl
at the top and remove it slowly in the
downward direction.
CAUTION
•If you do not remove the vane vinyl, be
aware that the vinyl may make noise
while operating the product.
Installation Location
Requirements
Install at a distance of at least 3 ¼ ft (1 m)
from a wall.
•If there is not enough space for air to be
taken in, performance of the air purier
may be reduced.
1 m
The performance of the product may differ
depending on the operating environment
(such as temperature and humidity).
•Product performance may be slightly
degraded when used outside of a humidity
range of 40% to 70%.
Transportation Requirements
Be careful not to drag the power cord on the
oor when moving or storing the product.
Transporting the Appliance
Carry the product safely by using the
handles at the top and back of the product.
CAUTION
•Do not move the product by holding the
outer cover. The cover may open and the
product may fall.

ENEN
16
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Add-on Display
•Up to three icons are displayed
•Icons are shown or displayed
according to display priority.
–Button Lock > Timer > Filter
Replacement Notication >
UVnano > Wi-Fi Connection
•UVnano function is applied only to
models applied UVnano.
Icon Description
Displays when the control
panel is locked.
Displayed when the sleep
timer is set.
Displays when it is time to
replace the lter.
Displayed when the UVnano
setting is enabled.
Displayed when the UVnano
is not working normally.
(Check if the lter and air intake
cover are properly installed.)
Displays when connected to
Wi-Fi.
Status display
•Air quality, PM10/PM2.5/PM1.0
dust concentration, temperature,
humidity, and operation status are
displayed.
Fan Speed Display
•Displays Fan speed from Auto,
Steps 1 to 10 and Turbo.
OPERATION
•The appearance or accessories of the product may differ depending on the model.
Status Display
PM10
5
3
㎍/㎥

17
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Control Panel
Standby On/Off Button
Can start or stop operation.
Speed Button
Allows you to adjust the fan speed
of the product.
Mode Button
Use it to set the operation mode of
the product.
Auto Fan Button
Sets the product’s Fan speed
automatically.
Rotation Button
Sets the rotation of the product.
(45°, 60°, 90°, 140°, Stop)
NOTE
•You can use extra functions by pressing the button
on the control panel for longer than 3 seconds.
(Example : Press the Mode button
and the Auto Fan button at the same time for 3
seconds or longer.)
h
UVnano function is applied only to models applied UVnano.
Long press (More
than 3 seconds)
Function
Control Panel Lock/Unlock
Connect Wi-Fi
Product sound On/Off
UVnano On/Off
Smart Diagnosis
Filter Replacement
Notication Reset
•Press and hold the button
.
Press and hold
the button
Function
Continuous change of Fan speed
Continuous change of Fan speed
Continuous change of standby screen

18
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Standby On/Off button
Can start or stop operation.
Speed button
Allows you to adjust the fan speed
of the product.
Mode button
Sets the operation mode.
(Wide Mode, Diffusion Mode, Direct
Mode)
Show Info button
Use to set the standby screen.
(Air quality, PM10, PM2.5, PM1.0,
Temperature, Humidity, Operating
status)
Turbo button
Sets fan speed to Turbo.
Auto Fan button
Sets the fan speed automatically.
Rotation button
Sets the rotation of the product.
(45°, 60°, 90°, 140°, Stop)
Sleep Timer button
Sets the sleep schedule.
(1 ~ 12 - Off)
NOTE
•You can use extra functions by pressing
the buttons on the remote controller for
longer than 2 seconds.
Long press
(More than 2 seconds)
Function
Continuous change of Fan speed
Continuous change of Fan speed
Product sound On/Off
Setting Display brightness
Remote Controller
s

19
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Preparing to Use the Remote
Controller
1
With the front side of the remote
controller facing up, remove the
battery tray by pushing in the
direction of number 2 while pressing
part 1 with a simple tool (cotton
swab, etc.).
①
②
②
①
2
Insert the battery provided with the
appliance into the tray. Place it with
the + mark facing up.
3Insert the battery tray back into the
remote controller.
NOTE
•If the remote controller is not operating
properly, check the polarity (+, -) of the
battery or replace the battery before
contacting the service center.
•Separately collect exhausted batteries.
•When using the remote controller, point the
remote controller transmitter toward the
display(status display / remote controller
receiver) on the product.
•The remote controller is not received
properly at a distance of more than 7 m
from the product.
•The remote controller signal reception
may be interrupted when strong lights
such as uorescent lamps or neon signs
are present. In this case, use the remote
controller in front of the remote signal
receiver of the indoor unit.
Display (Status Display /
Remote Controller receiver)

20
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WARNING
•The remote controller uses button/coin
type batteries (CR2025).
•Swallowing batteries may cause
serious injury or death. Go to hospital
emergency room immediately to seek
medical attention.
•Keep the battery out of reach of children.
•If the battery tray is not secured rmly,
stop using the appliance immediately
and keep it away from children.
CAUTION
•Do not arbitrarily modify the battery.
•Do not recharge or disassemble the
battery.
•Do not throw the battery into a re for
disposal or leave it near heat.
•Do not press multiple buttons at the
same time.
•Do not use it in a place with a lot of
water or moisture.
•Do not use it in a place with ames or
heat.
•Remove and store the battery in a safe
location if you do not intend to use the
remote controller for a long time.