LG LMU180CE User manual

LG
Multi Type Air Conditioner
OWNER'S MANUAL
LG
IMPORTANT
• Please read this owner's manual carefully and thoroughly
before installing and operating your room air conditioner.
• Please retain this owner's manual for future reference after
reading it thoroughly.
Prior to installation, this air-
conditioning unit must be submitted
for approval by the utility service
which provides electricity
(EN 61000-2, EN 61000-3 Norm).
ENGLISH FRANÇAIS ESPAÑOL

2Room Air Conditioner
Room Air Conditioner Owner’s 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 ..................8
Operating Instructions...........9
Remote Controller ..............9
Remote Control
Operation...........................11
Additional features...............19
Maintenance and Service ....23
Operation Tips ..................26
Troubleshooting ..............27

Safety Precautions
Owner's Manual 3
ENGLISH
Safety Precautions
To prevent injury to 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.
WARNING
CAUTION
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
■Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
WARNING
■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.

Safety Precautions
4Room Air Conditioner
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.
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.
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.
■Operation
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 let electric parts of
the product get wet.
• It may cause There is risk of
fire, failure of the product, or
electric shock.

Safety Precautions
Owner's Manual 5
ENGLISH
Be cautious that water could not enter the
product.
• There is risk of fire, electric shock, or product
damage.
Turn the main power off when cleaning or
maintaining the product.
• There is risk of electric shock.
Gasolin
Do not store or use flammable
gas or combustibles near the
product.
• There is risk of fire or failure of
product.
If strange sounds, or small or
smoke comes from product. Turn
the breaker off or disconnect the
power supply cable.
• There is risk of electric shock or
fire.
When the product is soaked
(flooded or submerged),
contact an Authorized
Service Center.
• There is risk of fire or 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.
Take care to ensure that nobody could step
on or fall onto the outdoor unit.
• This could result in personal injury and product
damage.

Safety Precautions
6Room Air Conditioner
■Installation
CAUTION
■Operation
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.
Do not install the product
where the noise or hot air from
the outdoor unit could be
offensive to the neighborhoods
or damage property.
• It may cause a problem for your
neighbors.
Use two or more people to
lift and transport the
product.
• Avoid personal injury.
Do not install the product
where it will be exposed to
sea wind (salt spray)
directly.
• It may cause corrosion on the
product. Corrosion, particularly on
the condenser and evaporator
fins, could cause product
malfunction or inefficient
operation.
90°
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.

Safety Precautions
Owner's Manual 7
ENGLISH
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.
Wax
Thinner
Do not step on or put
anyting 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.
Replace the all batteries in the
remote control with new ones
of the same type. Do not mix
old and new batteries or
different types of batteries.
• Could adversley effect
operation.
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.

Prior to operation
8Room Air Conditioner
Prior to operation
1. Contact an installation specialist for installation.
2. Connect the power cable between indoor unit and outdoor unit properly.
3. Use a dedicated circuit.
4. If the cord/plug is damaged, replace it with only an authorized replacement part.
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. 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.
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. There is a
possibility of injury if the unit’s power is accidentally triggered on while cleaning inner parts of the
unit.
For repair and maintenance, contact your authorized service dealer.
Preparing for operation
Usage
Cleaning and maintenance
Service
Symbols Used in this Manual
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that could cause harm to the
air conditioner.
This symbol indicates special notes.
NOTICE

Operating Instructions
Owner's Manual 9
ENGLISH
Remote Controller
StandardType ArtcoolTypeArtcool MirrorType
Operating Instructions
Storage and Tips For Using the Remote Controller
1. Remove the battery cover by pulling it according to the arrow
direction.
2. Insert new batteries making sure that the (+) and (-) of battery are
installed correctly.
3. Reattach the cover by sliding it back into position.
Use 2 AAA(1.5volt) batteries. Do not use rechargeable
batteries.
NOTICE
• The remote control may be stored mounted on a wall.
• To operate the room air conditioner, aim the remote control at the signal receptor.
• The remote control will operate the air conditioner at a distance of up to 7m(23ft).

Operating Instructions
10 Room Air Conditioner
Operation indication lamps
Receives the signals from the remote controller.(Signal receiving sound: two short beeps or one long beep.)
Operation Indication Lamps
: Lights up during the system operation.
Sleep Mode : Lights up during Sleep Mode Auto operation.
Timer : Lights up during Timer operation.
Defrost Mode : Lights up during Defrost Mode or
Hot Start operation.(Heat pump model only)
PLASMA : Indicate PLASMA purifier operation.
Signal Receptor
Receives the signals from the remote controller.(Signal receiving sound: two short beeps or one long beep.)
Operation Indication Lamps
On/Off : Lights up during the system operation.
Sleep Mode : Lights up during Sleep Mode Auto operation.
Timer : Lights up during Timer operation.
Defrost Mode
Outdoor unit
operation
: Lights up during Defrost Mode or Hot Start operation (Heat pump model only)
: Lights up during outdoor unit operation.(Cooling model only)
On/Off
Operation indication lamps
Desire temperature For cooling,dehumidification,heating modes it display Destired temperature
indicator •Cooling : 18°C~30°C(64°F~86°F) •AI : Auto Operation
•Dehumidification : 18°C~30°C(64°F~86°F) •Po : Jet Cool
•Heating : 16~30°C(60°F~86°F) •Lo :Test Mode
Desire temperature For cooling,dehumidification,heating modes it display Destired temperature
indicator •Cooling : 18°C~30°C(64°F~86°F) •AI : Auto Operation
•Dehumidification : 18°C~30°C(64°F~86°F) •Po : Jet Cool
•Heating : 16~30°C(60°F~86°F) •Lo :Test Mode
Plasma
: The function illustrates its dynamic mode by using a multiple lighting system.
Outdoor unit
operation : Lights up during outdoor unit operation.(Cooling model only)

Operating Instructions
Owner's Manual 11
ENGLISH
ON OFF
CANCEL
AUTO CLEAN
°C/°F
SET
Cooling Operation
Auto Operation
Healthy Dehumidification Operation
Flip-up door
(opened)
Heating Operation
Signal transmitter
• Cooling Model( ), Heat Pump Model( )
51
3
10
9
16
17
12
18
15
6
4
2
7
11
8
13
14
Operation Mode
Remote Control Operation
The Remote Controller transmits the signals to the system.
START/STOP BUTTON
Operation starts when this button is pressed and
stops when the button is pressed again.
OPERATION MODE SELECTION BUTTON
Used to select the operation mode.
ROOM TEMPERATURE
SETTING BUTTONS
Used to select the room temperature.
INDOOR FAN SPEED SELECTOR
Used to select fan speed in four steps
low, medium, high and CHAOS.
JET COOL
Used to start or stop the speed cooling/heating.
(Speed cooling/heating operates super high fan
speed.)
CHAOS SWING BUTTON
Used to stop or start louver movement and set
the desired up/down airflow direction.
ON/OFF TIMER BUTTONS
Used to set the time of starting and stopping operation.
TIME SETTING BUTTONS
Used to adjust the time.
TIMER SET/CANCEL BUTTON
Used to set the timer when the desired time is obtained and
to cancel the Timer operation.
SLEEP MODE AUTO BUTTON
Used to set Sleep Mode Auto operation.
AIR CIRCULATION BUTTON
Used to circulate the room air without cooling or heating.
ROOM TEMPERATURE CHECKING BUTTON
Used to check the room temperature.
PLASMA(OPTIONAL)
Used to start or stop the plasma-purification function.
RESET BUTTON
Initialize remote controller.
2nd F Button
Used prior to using modes printed in blue at the bottom of
buttons.
AUTO CLEAN
Used to set Auto Clean mode.
˚C TO ˚F SWITCHING BUTTON
Used to switch temperature reading from Centigrade to
Fahrenheit.
HORIZONTAL AIRFLOW DIRECTION CONTROL
BUTTON (NOT ON ALL MODELS)
Used to set the desired horizontal airflow direction.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16
17
18
15
(Heat Pump)
(Cooling Only)

Operating Instructions
12 Room Air Conditioner
ON
Cooling Healthy
Dehumidification
Auto Heating
(Heat pump model only)
To lower the temperature
To raise the temperature
(Cooling Only
model) (Heat Pump model)
Open the door on 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.
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) in 1°C(2°F) .
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.
Cooling Operation
Natural wind by the CHAOS logic
❏For more fresh feeling, press the Indoor Fan Speed Selector and set CHAOS mode. In this mode, the wind
blows like natural breeze by automatically changing fan speed according to the CHAOS logic.
Press the Start/Stop button.
The unit will respond with beep sound.
1
2
3
4

Operating Instructions
Owner's Manual 13
ENGLISH
ON
Cooling Healthy
Dehumidification
Auto Heating
(Heat pump model only)
To lower the temperature
To raise the temperature
(Cooling Only
model) (Heat Pump model)
Press the Start/Stop button.
The unit will respond with beep
sound.
Open the door on 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 set temperature will be
changed considering room temperature.
DURING AUTO OPERATION:
❏You cannot switch 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 to cooling, then you must
set the mode and the desired temperature again.
❏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.
Auto Operation
1
2
3

Operating Instructions
14 Room Air Conditioner
ON
Cooling Healthy
Dehumidification
Auto Heating
(Heat pump model only)
(Cooling Only
model) (Heat Pump model)
Press the Start/Stop button.
The unit will respond with beep
sound.
Open the door on 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.
Set the fan speed. 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.
DURING HEALTHY DEHUMIDIFICATION OPERATION:
❏If you select the dehumidification mode on the operation selection button, the A/C starts to run the
dehumidification function, automatically setting the room temp. and air volume to the best condition for
dehumidification based on the sensed room temp.
In this case, the setting temp. is not displayed in the Remote Controller and you are not able to control
the room temp. either.
❏During the healthy dehumidification function, the air volume is automatically set according to the
algorithm responding to the current room temp. and makes the room condition healthy and
comfortable even in the high humidity season.
Healthy Dehumidification Operation
NATURAL WIND BY THE CHAOS LOGIC
❏For more fresh feeling, press the Indoor Fan Speed Selector and set
CHAOS mode. In this mode, the wind blows like natural breeze by
automatically changing fan speed according to the CHAOS logic.
1
2
3

Operating Instructions
Owner's 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
beep sound.
Open the door on 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.
NATURAL WIND BY THE CHAOS LOGIC
❏For more fresh feeling than other fan speed, press the Indoor Fan Speed Selector and set to CHAOS
mode. In this mode, the wind blows like natural breeze by automatically changing fan speed according to
the CHAOS logic.
1
2
Set the temperature higher than the room temperature.
The temperature can be set within a range
of16°C~30°C(60°F~86°F) in 1°C(2°F).
Set the fan speed again. 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
4
Heating Operation(Heat pump model only)

Operating Instructions
16 Room Air Conditioner
or or
Press the Start/Stop button.
The unit will respond with
beep sound.
Press the Jet Cool button to operate the
speed cooling/heating mode and the unit
will operate in super high fan speed on
cooling/heating mode for 30/60 minutes.
To cancel the Jet Cool mode, press the Jet Cool button or
the fan button or the room temperature setting button again
and the unit will operate in high fan speed in cooling/heating
mode
1
2
3
❏Jet Cool function in heating mode is available on Artcool type only.
❏During the JET COOL function at any moment, the A/C starts to blow the cool/heat air at
extremely high speed for 30/60 minutes setting the room temp. automatically to
18°C/30°C(64°F/86°F). It is especially used to cool/heat the room temperature in the shortest
time.
❏In order to return to the normal cooling/heating mode from the Jet Cool mode, you just press
either the operation mode selection button, air volume selection or temp. setting button or the
JET COOL button again.
NOTICE
Jet Cool

Operating Instructions
Owner's Manual 17
ENGLISH
PLASMA Air Purifying Operation only
Press the Start/Stop button.
The unit will respond with beep sound.
Open the door on the Remote
Controller. Press the PLASMA air
purifying operation ON/OFF button.
Operation will start when the button
is pressed and stop when the button
is pressed again.
Set the fan speed. 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 (PLASMA) is
available in Heating or any other operations.
1
2
3
NEO PLASMA Purification Operation(Optional)
If you press the PLASMA button, NEO PLASMA
air purifying operates.
Each time the button ( ) is pressed, the fan
speed mode is shifed.

Operating Instructions
18 Room Air Conditioner
ON OFF
CANCEL
AUTO CLEAN
SET
AUTO CLEAN
ON OFF
CANCEL
SET
2nd F Operation
Press the Start/Stop button.
The unit will respond with
beep sound.
Open the door of the Remote Controller and press the 2nd F
button to operate functions printed in blue at bottom of
buttons.
(Check the indication of 2nd function on Remote Controller
display.)
These buttons operate the timer setting as follows:
2nd function goes off in a short time automatically or when the
button is pressed again.
For more details, refer to functions next page.
1
2
3

Additional features
Owner's Manual 19
ENGLISH
Sleep Mode
Setting the Time
Delay Start/Pre-Set Stop
Delay OFF Timer Delay ON Timer Delay OFF and ON Timer Delay ON and OFF Timer
1. Press the Sleep Mode Auto button to set the time
you want the unit to turn off automatically.
2. The Timer is programmed in one-hour increments
by pressing the Sleep Mode Auto button 1 to 7
times.
The sleep mode is available for 1 to 7 times.
To alter the time period in steps of 1 hour, press
the Sleep Mode Button while aiming at air
conditioner.
3. Make sure the Sleep Mode Auto LED lights up.
To cancel the Sleep Mode, press the sleep
Mode Auto button several times until the star
( ) disappears from the operation display.
The Sleep Mode will be operated at
low fan speed (cooling) or medium fan speed
(heat pump only) for quiet sleeping.
IN COOLING MODE: The temperature will
automatically rise by 1°C (2°F) over the next 30
minutes and by 2°C (4°F) in 1 hour for
comfortable sleeping.
NOTICE
1. Time can be set only when you have pressed the
Reset button. If you have just replaced the batteries,
the Reset button should be pressed to reset the
time.
Press the Start/Stop button.
2. Press the Time Setting buttons until the desired time
is set.
3. Press the Timer SET button.
Check the indicator for A.M. and P.M.
NOTICE
1. Make sure the time is set correctly on the Remote
Controller display.
2. Press the ON/OFF Timer
buttons to turn Timer on or off.
3. Press the Time Setting
buttons until the desired
time is set.
4. Press the selected on/off setting by
pressing the Timer SET button while
aiming the Remote Controller at the
signal receptor.
To cancel the setting the timer.
Press the Timer Cancel button while aiming
Remote Controller at the signal receptor.
(The timer lamp on the air conditioner and the
display will go out.)
Select one of the following four types of operation.
NOTICE
with the unit running
ON OFF
CANCEL
Additional features
SET
CANCEL
SET

Additional features
20 Room Air Conditioner
Vertical Airflow Direction Control
The up/down airflow (Vertical Airflow) can be adjusted
by using the remote control.
Press the Start/Stop button to start the unit.
Open the door on the remote control.
Press Chaos Swing button and the louvers will swing up
and down. Press the Chaos Swing button again to set
the vertical louver at the desired airflow direction.
❏If you press the CHAOS swing button, the horizontal airflow
direction is changed automatically based on the CHAOS
algorithm to distribute the air in the room evenly and at the
same time to make the human body feel most comfortable,
as if enjoying a natural breeze.
❏Always use the remote control to adjust the up/down airflow
direction. Manually moving the vertical airflow direction
louver by hand could damage the air conditioner.
❏When the unit is shut off, the up/down airflow direction louver
will close the air outlet vent of the system.
NOTICE
The up/down and right/left airflow can be adjusted by
using the Remote Controller.
Press the Start/Stop button to start the unit.
Press Chaos Swing button and the louvers will swing.
Press the button again and the louvers will stop. After 30
minutes, the louvers return to the maximum airflow
position automatically.
Artcool Type
Standard, Artcool Mirror Type