
Room Air conditioner
Operating Instructions
Model CS–C281KR (Indoor)
CU–C281KR (Outdoor)
Before using your air-conditioner, please
read this operating instructions carefully
and keep it for future reference.

Contents
1
Safety Precautions.........................................2-4
– Installation precautions
– Operation precautions
Name of Each Part
.........................................
5-6
– Indoor unit
– Outdoor unit
– Accessories
– Remote control
Preparation Before Operation..........................7-8
– Before operating the unit
– How to insert batteries
– Operating the remote control
How to Operate...........................................9-10
Setting the Timer ......................................11-12
Convenient Operation................................13-14
– Sleep mode
– When remote control cannot be used
– OFF/ON remote control signal receiving
sound
Operation Hints.........................................15-16
Better Care and Maintenance.....................17-18
– Cleaning the air conditioner and air filters
– Replacement of air purifying filters
– When not using the air conditioner for a
long period
– Pre-season inspection
Troubleshooting ........................................19-20
– Normal operation
– Abnormal operation
– Call the dealer immediately
Before use
If necessary
How to use

Safety Precautions
2
Before operating, please read the following “Safety Precautions” carefully.
To prevent personal injury, injury to others and property damage, the following instructions must be followed.
Incorrect operation due to ignoring of instructions will cause harm or damage, the seriousness of which is
classified as follows:
The instructions to be followed are classified by the following symbols:
Warning:
Caution :
This sign warns of death or serious injury.
This sign warns of injury or damage to property only.
This symbol (with a white background) denotes an action that is PROHIBITED.
These symbols (with a black background) denote an action that is COMPULSORY.
Installation precautions
Do not install, remove and reinstall the unit yourself.
Improper installation will cause leakage, electric shock or fire. Please consult an authorized dealer or
specialist for the installation work.
Warning
This room air conditioner must be earthed. Ensure that drainage piping is connected
properly.
Do not install the unit in a place where there
may be explosive gas leaks.
Caution
Improper grounding could cause
electric shock.
Gas leaks near the unit could cause
fires.
Otherwise, water will leak out.
Y
Y
Y
Y

3
Operation precautions
Insert the power plug properly.
Heat generated by a loose
power plug could cause electric
shock or fire.
Electrical outlet and power plug
shall be easilly accessible.
Do not operate or stop the
unit by inserting or pulling
out the power plug.
It could cause electric shock or
fire.
Do not damage or use an
unspecified power cord.
It will cause electrical shock or
fire.
Do not modify the length of
the power cord or use an
extension cord.
It could cause electric shock or
fire.
Do not modify the length of
the power cord or use an
extension cord.
It could cause electric shock or
fire.
Do not operate the unit with
wet hands.
It could cause an electric shock.
Do not insert finger, sticks or
other objects into the units.
It could lead to physical injury
and cause damage to the units.
Do not be directly exposed
to the cold airstream for too
long.
It could lead to health problems.
If there is a smell of burning,
stop the air conditioner and
disconnect the power supply.
The heat generated could
cause electric shock or fire.
Please consult an authorized
dealer or service centre.
Do not try to repair the unit
yourself.
It could lead to fire or cause an
electric shock. Please call an
authorized dealer or service
centre.
Switch off
the breaker.
Disconnect
the power
plug.
Warning
Y

4
Do not remove the power
plug by pulling the cord.
Hold the plug when disconnecting the plug from the wall outlet.
Switch off the power supply if
the unit is not going to be
used for a long period of time.
If dust accumulates on the plug, it
will generate heat and this could
cause a fire.
When cleaning the unit, remove the plug.
This is to prevent injury due to
the rotating fan in the unit.
Do not use for other purposes.
Do not use for preservation purposes. It will affect food quality,
animals or plants.
Do not place combustor in
the path of the airflow from
the unit.
Incomplete combustion could
cause toxic gas (CO) poisoning.
Ventilate the room regularly.
If not ventilated regularly, the
lack of oxygen could cause
headaches.
Do not wash the unit with
water.
It could cause an electric shock.
Inspect the unit for any damage.
Ensure that the necessary
repairs are carried out.
Do not sit or place anything
on the outdoor unit.
You might fall off or the unit
might collapse.
Switch off
the breaker.
Disconnect
the power
plug.
Caution
Y

Name of Each Part
5
Indoor unit
Outdoor unit
Front Panel
Air Intake Vent
Panel Opener
Vertical Airflow
Direction Louver
Air Outlet Vent
Horizontal
Airflow Direction Louver
(Manually adjusted)
Signal Receptor
Operation Indication
Lamps (LED)
Air Intake Vents
Air Outlet Vents
(Side)
(Rear)
Ground
Terminal
(Inside Cover)
Piping
Drain Hose
Power Sleep Timer
Red Orange Orange

6
Remote control
Accessories
Remote Control
Two R03 dry-cell
batteries or equivalent
Air Purifying Filters
Signal Transmitter
Operation Display
Sleep Mode
Operation Button
OFF/ON Button
Airflow Volume
Selection Button
Airflow Direction Manual
Control Button
Room Temperature
Setting Button
Operation Mode
Selection Button
Airflow Direction Auto
Control Button
Separate displays and functions are available when the door is opened.
Door
OFF-Timer Button
Time
Button
ON-Timer Button
Door
Cancellation Button
Clock Button
Set Button
OFF-TIMER TIME ON-TIMER
SETCANCEL

Preparation Before Operation
7
Before operating the unit
Connect the power
supply cord to an
independent power
supply.
1
2
Open the front panel.
Hold the panel openers at both
sides and pull up the front panel.
3
Remove air filter.
Insert air purifying filter.
Insert the air filters.
Hold the tab to raise up slightly
and then pull down.
Air
filter
Be careful not to
hurt your hands by
metal parts.
Air purifying
filter
<Note>
Use under the following conditions:
(Unit in ˚C)
DBT: Dry Bulb Temperature
Cooling
WBT: Wet Bulb Temperature
In door Out door
DBT WBT DBT WBT
Maximum Temperature 32 23 43 26
Minimum Temperature 16 11 16 11