LG LSU090HE User manual

P/NO : 3828A20434H www.lg.com
http://www.lghvac.com
OWNER’S MANUAL
AIR CONDITIONER
Please read this manual carefully before operating
your set and retain it for future reference.
TYPE : Room Air Conditioner
ENGLISH FRANÇAIS ESPAÑOL

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2Room Air Conditioner
Room Air Conditioner Ownerʼs Manual
TABLE OF CONTENTS
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
■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 your air conditioner properly. Just 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 National Electric Code by
qualified and authorized personnel only.
Safety Precautions.........................3
Prior to Operation ..........................9
Introduction ..................................10
Electrical Safety ...........................11
Operating Instructions.................12
Maintenance and Service ............26

Safety Precautions
Ownerʼs Manual 3
ENGLISH
Safety Precautions
To prevent the injury of the user or other people and property damage, the following instructions must be
followed.
■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 to properties only.
■The meanings of the symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
■Installation
Do not use damaged power
cords, plugs, or a loose
socket.
• There is risk of fire or electric
shock.
For electrical work, contact
the dealer, seller, a qualified
electrician, or an Authorized
Service Center.
• There is risk of fire or electric
shock.
Always use the power plug
and socket with the ground
terminal.
• There is risk of electric shock.
Install the panel and the
cover of control box securely.
• There is risk of fire or electric
shock.
Do not modify or extend the
power cord.
• 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.

Safety Precautions
4Room Air Conditioner
Be cautious when unpacking
and installing the product.
• Shape edges could cause injury.
Be especially careful of the sharp
edges.
For installation, always
contact the dealer or an
Authorized Service Center.
• There is risk of fire, electric shock,
explosion, or injury.
Do not install the product on
a defective installation stand.
• It may cause injury, accident, or
damage to the product.
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.
Install the indoor unit on the
wall where the height from
the floors more then 8ft(2.4m)
• There are sharp moving parts that
could cause personal injury.
Do not handle the pipe by
yourself(Costomer)
• High-Pressure refrigent may cause
personal injury.
■Operation
Do not turn the air-
conditioner ON or OFF by
plugging or unplugging the
power plug.
• There is risk of fire or electric
shock.
Use a dedicated outlet for this
appliance.
• There is risk of fire or electric
shock.
Grasp the plug to remove the
cord from the outlet. Do not
touch it with wet hands.
• There is risk of fire or electric
shock.
8ft(2.4m)

Safety Precautions
Ownerʼs Manual 5
ENGLISH
Use a dedicated outlet for this
appliance.
• There is risk of fire or electric
shock.
Grasp the plug to remove the
cord from the outlet. Do not
touch it with wet hands.
• There is risk of fire or electric
shock.
Do not allow water to run
into electric part.
• There is risk of fire, failure of
the product, and/or electric
shock.
Do not place a heater or other
appliances near the power
cable.
• There is risk of fire, failure of the
product, and/or electric shock.
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 furnishings.
Do not store of use
flammable gas or
combustibles near the air
conditioner.
• There is risk of fire or product
failure.
Do not use the product in a
tightly closed space for a
long time.
• Oxygen deficiency could occur.
• Some ventilation by opening window
is necessary for the fresh air
When flammable gas leaks, turn off
the gas and open a window for
ventilation before turning the
product on. Do not use the
telephone or turn switches on or off.
• There is risk of explosion or fire.
Unplug the unit if strange
sounds odors or smoke
comes from it.
• There is risk of fire, Product faiure,
and/or electric shock.
Wax
Thinner

Safety Precautions
6Room Air Conditioner
■Installation
Take care to ensure that
nobody could step on or fall
onto the outdoor unit.
• There could result in personal
injury and product damage.
Do not insert hands or other
objects through the air inlet
or outlet while the air
conditioner is plugged in.
• There are sharp and moving parts
that could cause personal injury.
Always check for
gas(refrigerant) leakage after
installation or repair of
product.
• Low refrigerant levels may cause
product failure.
Ventilate the product from
time to time when operating it
together with a stove, etc.
• There is risk of fire or electrical
shock.
Unplug the appliance before
performing cleaning or
maintenance.
• There is risk of electric shock.
When the product is not 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.
Stop operation and close any
window in storm or hurricane
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.
When the product is soaked
(flooded or submerged),
contact an Authorized
Service Center.
• There is risk of electrical shock.

Safety Precautions
Ownerʼs Manual 7
ENGLISH
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.
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.
Use two or more people to lift
and transport the air
conditioner.
• Avoid personal injury.
Do not install the product
where it will be exposed to
sea wind (salt spray) directly.
• It may cause corrosion in the
product. Corrosion, particularly on
the condenser and evaporator fins,
could cause product malfunction
or inefficient operation.
Do not direct airflow at room
occupants.
• This could damage 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.
■Operation
90˚

Safety Precautions
8Room Air Conditioner
Do not drink the water
drained from the unit.
• It is not sanitary and could cause
serious health issues.
Use a firm stool or ladder
when cleaning or maintaining
the air conditioner.
• Be careful and avoid personal
injury.
Replace all the batteries in
the remote.
• There is risk of fire or explosion.
Do not recharge or
disassemble the batteries. Do
not dispose of 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.
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
hazards.
■Disuse
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 unit)
• 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.

Ownerʼs Manual 9
Prior to operation
Prior To Operation
1. Contact an installation specialist for installation.
2. Plug in the power plug properly.
3. Use a dedicated circuit.
4. Do not use an extension cord.
5. Do not start/stop operation by plugging/unplugging the power cord.
6. If the cord/plug is damaged, ony replace it with an authorized replacement part.
1. Being exposed to direct airflow for a long time may be hazardous to your health. Do not expose
occupants, pets, or plants to direct airflow for a long time.
2. Ventilate the room when the air conditioner is used with other heating devices. Otherwise the oxygen
supply may be inadequate.
3. Do not use this air conditioner for non-specified special purpose (e.g. preserving precision devices, food,
pets, plants, or art objects). Such use may damage your properties.
1. Do not touch the metal parts of the unit when removing the filter. Injury can occur.
2. Do not use water to clean inside the air conditioner. Exposure to water can destroy the insulation,
leading to 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 power is accidently turned on
while the interior of the unit is being cleaned.
For repair and maintenance, contact your authorized service dealer.
Preparing For Operation
Usage
Cleaning And Maintenance
Service
ENGLISH

10 Room Air Conditioner
Introduction
Introduction
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that may cause harm to the
air conditioner.
This symbol indicates special notes.
NOTICE
Features
Symbols Used In This Manual
(Side) (Rear)
Air outlet
vents
Air Inlet
vents
Piping
Signal Receptor
Front Panel
Air Inlet
Air Filter
Indoor
Outdoor
• This appliance should be installed in accordance with national wiring regulations. This guide acts
as a guide to help to explain product features.

Ownerʼs Manual 11
ENGLISH
Electrical Safety
Electrical Safety
• This appliance must be properly grounded.
To minimize the risk of electric shock, you must alway plug into a grounded oulet
• Do not cut or remove the grounding prong from the power plug.
• Attaching the adapter ground terminal to the wall receptacle cover screw does
not ground the appliance unless the cover screw is metal and not insulated, and
the wall receptacle is grounded through the house wiring.
• If you have any doubt whether the air conditioner is properly grounded, have the
wall receptacle and circuit checked by a qualified electrician.

12 Room Air Conditioner
Operation indicating
lamps
Operating Instruction
How To Insert The Batteries
Operating Instruction
Remove the battery cover by pulling it according to
the arrow direction.
Insert new batteries making sure that the (+) and (-)
of battery are installed correctly.
Reattach the cover by sliding it back into position.
Use 2 AAA(1.5volt) batteries.
Do not use rechargeable batteries.
NOTICE
• The remote controler may be stored by mounting it on
a wall.
• To operate the room air conditioner, aim the remote
control at the signal receptor.
Storage And Tips For Using The Remote Controler
Signal Receptor
Receives the signals from the remote control.(Signal receiving sound: two short beeps or one long beep.)
Operation Indication Lamps
On/Off : Lights up during the system operation, error
code and auto restart setting.
Sleep mode : Lights up during sleep mode auto operation.
Plasma : The function illustrates its dynamic mode by
using a multiple lighting system.
Timer : Lights up during timer operation.
Defrost mode
Power Display : Indicates the setting temperature and operation
mode.
: Lights up during defrost mode or *hot start
operation (Heat pump model only)
: Lights up during outdoor unit operation.
(Cooling model only)
Outdoor unit
operation
OUT
DOOR

Operating Instruction
Ownerʼs Manual 13
ENGLISH
ON OFF
CANCEL
AUTO CLEAN
SET
1
3
5
4
9
10
12
14
16
18
7
2
8
13
15
11
6
Cooling Operation
Auto Operation or Auto Changeover
Healthy Dehumidification Operation
Flip-up door
(opened)
Heating Operation
Signal transmitter
• Cooling Model( ), Heat Pump Model( )
17
Operation Mode
Controls
Remote Control Operations
1. START/STOP BUTTON
Operation starts when this button is pressed
and stops when the button is pressed again.
2. OPERATION MODE SELECTION BUTTON
Used to select the operation mode.
3. ROOM TEMPERATURE SETTING
BUTTONS
Used to select the room temperature.
4. INDOOR FAN SPEED SELECTOR
Used to select fan speed in four steps
low, medium, high and CHAOS.
5.
JET COOL
Used to start or stop the speed cooling.(speed
cooling operates super high fan speed in
cooling mode.)
6. CHAOS SWING BUTTON
Used to stop or start louver movement and
set the desired up/down airflow direction.
7. ON/OFF TIMER BUTTONS
Used to set the time of starting and stopping
operation. (See page 22)
8. TIME SETTING BUTTONS
Used to adjust the time. (See page 22)
9. TIMER SET/CANCEL BUTTON
Used to set the timer when the desired time
is obtained and to cancel the Timer
operation. (See page 22)
10. SLEEP MODE AUTO BUTTON
Used to set Sleep Mode Auto operation.
(See page 22)
11. AIR CIRCULATION BUTTON
Used to circulate the room air without
cooling or heating. (See page 23)
12. ROOM TEMPERATURE CHECKING
BUTTON
Used to check the room temperature.
13. NEO PLASMA(OPTIONAL)
Used to start or stop the plasma-
purification function. (See page 20)
14. HORIZONTAL AIRFLOW DIRECTION
CONTROL BUTTON (OPTIONAL)
Used to set the desired horizontal airflow
direction.
15. RESET BUTTON
Used prior to resetting time.
16. 2nd F Button
Used prior to using modes printed in blue
at the bottom of buttons. (See page 21)
17. AUTO CLEAN (OPTIONAL)
Used to set Auto Clean mode.
18. ˚C TO ˚F SWITCHING BUTTON
Used to switch temperature reading from
Centigrade to Fahrenheit.

Operating Instruction
14 Room Air Conditioner
ON
Cooling Healthy
Dehumidification
Auto
Changeover
Heating
(Heat pump model only)
To lower the temperature
To raise the temperature
Press the Start/Stop button.
The unit will respond with
a beep.
Open the door of the remote controller. To select Cooling
Operation, press the Operation Mode Selection button.
Each time the button is pressed, the operation mode is
shifted in the direction of the arrow.
Close the door of the remote controller. Set the temperature
lower than the room temperature. The temperature can be
set within a range of 18°C~30°C(64°F~86°F) at intervals of
1°C(2°F).
Set the fan speed again with the door
of the remote controller still closed.
You can select the fan speed in four
steps-low, medium, high and CHAOS.
Each time the button is pressed, the
fan speed mode is shifted.
1
2
3
4
Gentle Breeze by the CHAOS logic
❏For fresher feeling, press the Indoor fan speed selector and set to CHAOS mode. In this mode, the wind
blows like a natural breeze by automatically changing fan speed according to the CHAOS logic.
Cooling operation

Operating Instruction
Ownerʼs Manual 15
ENGLISH
ON
Cooling Healthy
Dehumidification
Auto Heating
(Heat pump model only)
To lower the temperature
To raise the temperature
Press the Start/Stop button.
The unit will respond with
a beep.
Open the door of the remote controller. To select Auto
Operation, press the operation mode selection button.
Each time the button is pressed, the operation mode is
shifted in the direction of the arrow.
The temperature and fan speed are automatically set by the
electronic controls based on the actual room temperature. If
you want to change the set temperature, press the Room
Temperature Setting buttons. The cooler or warmer you feel,
the more times (up to two times) you should press the button.
The set temperature will be changed automatically.
During Auto Operation
❏You cannot control the indoor fan speed. It has already been set by the Fuzzy rule.
❏If the system is not operating as desired, manually switch to another mode. The system will not
automatically switch from the cooling mode to the heating mode, or from heating mode to cooling
mode, it must be done by manually resetting.
❏During Auto Operation, pressing the CHAOS swing button makes the horizontal louvers swing up and
down automatically. If you want to stop auto-swing, press the CHAOS swing button again.
1
2
3
Auto operation (Optional)

Operating Instruction
16 Room Air Conditioner
ON
Cooling Healthy
Dehumidification
Auto
Changeover
Heating
(Heat pump model only)
To lower the temperature
To raise the temperature
Auto changeover operation(Optional)
Press the Start/Stop button.
The unit will respond with
a beep.
Open the door of the remote controller. To select Auto Changeover
Operation, press the Operation Mode Selection button.
Each time the button is pressed, the operation mode is shifted in the
direction of the arrow.
1
2
Close the door of the remote controller. Set the temperature
lower than the room temperature. The temperature can be
set within a range of 18°C~30°C(64°F~86°F) at intervals of
1°C(2°F).
Set the fan speed again with the door
of the remote controller still closed.
You can select the fan speed in four
steps-low, medium, high and CHAOS.
Each time the button is pressed, the
fan speed mode is shifted.
3
4
During Auto Changeover Operation
The air conditioner changes the operation mode automatically to keep indoor temperature. When room
temperature varies over ±2°C from the set temperature, air conditioner keeps the room temperature
within ±2°C of the set temperature by auto changeover mode.

Operating Instruction
Ownerʼs Manual 17
ON
Cooling Healthy
Dehumidification
Heating
(Heat pump model only)
Auto
Changeover
Press the Start/Stop button.
The unit will respond with
a beep.
Open the door of the remote controller. To select Healthy
Dehumidification Operation, press the Operation Mode
Selection button.
Each time the button is pressed, the operation mode is
shifted in the direction of the arrow.
1
2
Set the fan speed again with the door
of the remote controller still closed.
You can select the fan speed in four
steps-low, medium, high, or CHAOS.
Each time the button is pressed, the
fan speed mode is shifted.
3
Gentle Breeze by the CHAOS logic
❏For fresher feeling, press the Indoor Fan Speed Selector and set
to CHAOS mode. In this mode, the wind blows like a natural
breeze by automatically changing fan speed according to the
CHAOS logic.
Healthy dehumidification operation
During Healthy Dehumidification Operation
❏If you select the dehumidification mode on the operation selection button, the product starts to run the
dehumidification function. It automatically sets the room temp. and airflow volume to the best condition
for dehumidification, based on the sensed current room temp.
In this case, however, the setting temperature. is not displayed on the remote controller and you are not
able to control the room temperature. either.
❏During the healthy dehumidification function, the airflow volume is automatically set according to the
optimization algorithm responding to the current room temp. status, so the room condition is kept
healthy and comfortable even in the very humid season.
ENGLISH

Operating Instruction
18 Room Air Conditioner
ON
Cooling Healthy
Dehumidification
Heating
(Heat pump model only)
To lower the temperature
To raise the temperature
Auto
Changeover
Heating operation (Heat pump model only)
Press the Start/Stop button.
The unit will respond with
a beep.
Open the door of the remote controller. To select Heating
Operation, press the Operation Mode Selection button.
Each time the button is pressed, the operation mode is
shifted in the direction of the arrow.
Close the door of the remote controller.
Set the temperature higher than the room temperature.
The temperature can be set within a range of
16°C~30°C(60°F~86°F) at intervals of 1°C(2°F).
Set the fan speed again with the door of the
remote controller still closed. You can
select the fan speed in four steps–low,
medium, high and CHAOS. Each time the
button is pressed, the fan speed mode is
shifted.
1
2
3
4
Gentle Breeze by the CHAOS logic
❏For fresher feeling, press the Indoor Fan Speed Selector and set to CHAOS mode. In this mode, the
wind blows like a natural breeze by automatically changing fan speed according to the CHAOS logic.

Operating Instruction
Ownerʼs Manual 19
ENGLISH
or or
❏During the JET COOL function at any moment, the A/C starts to blow the cool air at extremely
high speed for 30 minutes setting the room temperature. automatically to 18°C. It is especially
used to cool the room temperature. quickly in a hot summer.
In heat pump mode or auto changeover mode, however, the JET COOL function is not available.
❏ In order to return to the normal cooling mode from the JET COOL mode, just press the operation
mode selection button, airflow volume selection, temperature. setting button or the JET COOL
button again.
NOTICE
Press the Start/Stop button.
The unit will respond with
a beep.
Press the Jet Cool button to operate
the speed cooling mode and the unit
will operate at super high fan speed
on cooling mode for 30 minutes.
To cancel the Jet Cool mode, press the Jet Cool button, the
fan speed button or the room temperature setting button
again and the unit will operate at high fan speed on cooling
mode.
1
2
3
Jet cool operation

Operating Instruction
20 Room Air Conditioner
Press the Start/Stop button.
The unit will respond with a
beep.
1
Open the door of the remote
controller. Press the PLASMA
button.
Operation will start when the button
is pressed and stop when the button
is pressed again.
2
Set the fan speed again with the door of the remote
controller closed. You can select the fan speed in four
steps-low, medium, high or CHAOS.
Each time the button is pressed, the fan
speed mode is shifted.
❈Air purifying operation (NEO PLASMA) can be
with cooling, Heating or any other operations.
NEO PLASMA Air Purifying Operation only
If you press the only PLASMA button, only
PLASMA purification function operates.
Then, fan speed is low. You can select the fan
speed in four steps-low, medium, high or
CHAOS.
Each time the Indoor Fan Speed Selector
button is pressed, the fan speed mode is
shifted.
3
NEO PLASMA purification operation(Optional)