Panasonic CS-A281KR User manual

Room Air conditioner
Operating Instructions
Model CS–A281KR (Indoor)
CU–A281KR (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
Contents
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 PROHIB-
ITED.
These symbols (with a black background) denote an action that is COM-
PULSORY.
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.
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3
Operation precautions
Warning
Insert the power plug proper-
ly.
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 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.
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4
Do not remove the power
plug by pulling the cord.
Hold the plug when disconnec-
ting 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, re-
move 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 pur-
poses. 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 dam-
age.
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.
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Caution

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 Heating
WBT: Wet Bulb Temperature In door Out door Indoor Out door
DBT WBT DBT WBT DBT WBT DBT WBT
Maximum Temperature 32 23 43 26 30 — 24 18
Minimum Temperature 16 11 16 11 16 — 2 1

8
How to insert batteries
Operating the remote control
Gently press the
place marked
[OPEN] and
slide the cover
toward you.
(Two R03 dry-cell
batteries or equivalent)
Fix the cover to the back of the remote control
(“PM 12:00” will flash in the operation dis-
play.)
If the display does not appear when the batter-
ies are inserted, remove the batteries and insert
them once more.
Be sure
that the (+) and
(–) directions
are correct.
Make sure that the
signal path is not
obstructed.
The maximum dis-
tance at which sig-
nals can be received
is about 10 m.
Aim at the signal receptor on the room air condi-
tioner when operating.
Do not drop or throw the remote control.
Do not place the remote control in a location that
is exposed to direct sunlight or next to a heating
unit or other heat source.
Signal received sound:
One short beep or one long beep.
Pull out the power plug or turn off the power
breaker when:
The air conditioner is not going to be used for
an extended period of time.
If the power supply cord connect, approximately
3.25 watts of electric power are used even if the
main unit is turned off by remote control.
There is a danger of lightning.
The air conditioner is provided with a built-in pro-
tective device, but the control equipment may be
adversely affected depending on the extent of
Regarding the batteries.
The batteries can be used for approximately one
year.
Do not use rechargeable (Ni-Cd) batteries,
because such batteries differ from standard dry-
cell batteries in shape, dimensions and perfor-
mance.
Be sure to replace the batteries with two new bat-
teries of the same type.
Do not dispose of empty batteries in household
waste. Take them to special local collection sites.

How to Operate
9
If there is a power failure, operation will be
automatically restarted after 3 minutes when
the power is resumed with previous operation
mode and airflow direction.
(when the operation is not stopped by remote
control.)
If you do not intend to continue the operation
when the power is resumed, pull out the power
plug at main unit or power supply.
When you insetr the power plug the operation
will be automatically restarted with previous
operation mode and airflow direction.
Note: 1. If you do not require Auto Restart con-
trol, please consult your dealer.
2. Auto Restart Control is not available
when Timer or Sleep Mode is set.
Auto Restart Control.
For Heating : 20 –24
For Cooling : 26 –28
For Soft Dry : 1 –2lower than
room temperature.
Recommended temperature for health
and comfort.
<Operation Details>
AUTO-Automatic Operation.
Once the Automatic Operation is selected, the in-
door temperature sensor operates automatically
to select the desired operation mode with Cooling,
Soft Dry or Heating.
The operation mode changes every hour, when
necessary.
DRY-Soft Dry Operation.
Soft Dry is a very gentle Cooling Operation con-
sisting primarily of dehumidifying. It does not
lower the room temperature very much.
Cooling Operation
until room tem-
perature reaches the
setting temperature Super Low air-
flow amount
When room temperature reaches the setting tempera-
ture, operation will switch to Soft Dry.
Setting
Temperature

10
HEAT – Heating Operation
Defrosting Operation
Depend on the outdoor temperature, the operation
occasionally stops to melt the frost on the outdoor
unit.
Heat is obtained from outdoor air to warm up the
room. When the outdoor ambient air temperature
falls, the heating capacity of the unit might be
reduced.
We recommend that you use an additional heating
device when the outdoor ambient air temperature
is low.
Automatic Airflow Volume
The speed of the indoor fan is adjusted automati-
cally according to the operation. The indoor fan
stops occasionally during cooling operation.
Automatic Airflow Volume
1
2
3
4
5
MANUAL
Press to select operation mode.
The display changes in the order
Press to start the operation.
Operation indication lamp (RED) will light up.
Press once more, to stop the operation.
each time the button is pressed.
Press to select airflow volume.
The display changes in the order.
Press to select room temperature.
Heating, Cooling, Soft Dry-Select temperature as desired.
(16 30 )
Automatic.
Press continuously.
The vertical airflow direction louver will move up and down. Release the
button when the louver is at the desired position.
Press
Cooling & Soft Dry – The vertical airflow direction louver will swing up and
down automatically.
Heating – When the discharge air temperature is low such as at the start
of heating operation, the cold air blows at horizontal level.
As the temperature rises, the hot air blows in a downwards
direction.
To stop the automatic airflow direction operation, press button.
Automatic Low Medium High
AUTO FAN
AUTO HEAT COOL DRY
2lower than
standard standard 2 higher than standard
MANUAL
SWING
MODE
FAN SPEED
TEMP
SWING MANUAL
OFF/ON
SWING

Setting the Timer
11
To reset the Timer.
(Example) If the OFF Timer has been set.
Even if there is a power failure, the setting time
is still stored in the memory because the
remote control is a battery operated type.
If there is a power failure.
OFF-TIMER SET
<Note>
Regarding remote control. If the current time is not set correctly, correct Timer
setting will not be possible.
When the Timer is set, the current time display will
vanish.
[RESET] points will clear the memory once they are
shorted.
[B A] switch is used when two air conditioners
units have been installed in one room. Please con-
sult your dealer.
[RESET] points
[B A] switch
OPEN

12
To set the current time.
TIME
Set hours and minutes
...to advance the time
...to reverse the time
To set the Timer.
OFF Timer
OFF-TIMER SET
To cancel the Timer.
OFF Timer
OFF-TIMER
To change the Timer setting time.
(Example) To change the ON timer
setting time.
ON-TIMER
TIME
Set hours and minutes
ON Timer
ON-TIMER
Set hours and minutes
...to increase 10 minutes
each step.
...to decrease 10 minutes
each step.
The “OFF-TIMER” will blink.
The “ON-TIMER” will blink.
The Timer indication lamp at main
unit will light up. LED colour: Orange.
SET
TIME
...to increase 10 minutes
each step.
...to decrease 10 minutes
each step.
Change hours and minutes setting
TIME
...to increase 10 minutes
each step.
...to decrease 10 minutes
each step.
The Timer indication lamp at main
unit will light up. LED colour: Orange.
The Timer indication lamp at main
unit will go off.
To cancel the ON Timer, follow the
same procedure.
CANCEL
SET
Timer
The ON Timer and OFF Timer can only be set
once during a day.
The operation will start before the actual setting
time with ON Timer setting.
Cooling and Soft Dry : 15 minutes before
Heating and Automatic : 30 minutes before
This is to allow time to attain your desired set
temperature.
Setting the OFF Timer.
This is useful for saving electricity costs in-
curred by forgetting to turn off the air condi-
tioner.
Setting the ON Timer.
If the air conditioner is set before you go out,
the room temperature will be close to your
desired temperature when you return.

Convenient Operation
13
Sleep Mode
This is to gain a comfortable room temperature while sleeping.
To set Sleep Mode.
Press
To cancel Sleep Mode.
Press once more
Sleep Mode Operation.
when the room temperature reaches
the setting temperature or after 1
hour of operation, sleep shift opera-
tion starts and the airflow volume will
automatically change to low.
Sleep Mode Operation time is 8
hours.
When using together with the Timer,
the Timer has priority.
(The sleep indication lamp on the
main unit will light up.)
(The sleep indication lamp on the
main unit will switch off.)
<Information>
Cooling or Soft Dry Operation for Sleep Mode
movement will start to avoid overcooling. Heating Operation for Sleep Mode move- ment will start to avoid overheating.
Sleep Operation button is pressed Sleep shift operation
starts
Sleep Operation button is pressed
Approx. 0.5°C increase
Approx. 0.5°C increase
Approx. 8 hours after sleep
shift operation starts, stops
automatically
Sleep shift operation starts
Approx. 2°C decrease
Approx. 3°C decrease
Approx. 8 hours
after sleep shift
operation starts,
stops
automatically
TEMP.
SETTING
TEMPERATURE
0–1 hour
1 hour
TIME
TEMP.
SETTING
TEMPERATURE
0–1 hour
1 hour
TIME
SLEEP
SLEEP

14
When the remote control cannot be used
Test Run Button.
(Use when installing and moving)
Auto Operation Button.
When the remote control cannot be used,
press Auto Operation Button to run auto-
matic Operation.
(airflow direction setting will be automatic.)
Press Auto Operation Button.
(The operation indication lamp will blink for 20
seconds, and then light up)
If the button is pressed once more, the air con-
ditioner will stop.
(The operation indication lamp will switch off.)
OFF/ON remote control signal receiving sound
The Remote Control signal receiving sound can be omitted as desired.
To switch OFF the signal receiving sound, press Auto Operation Button for 10 seconds or more. At
the same time, Automatic Operation starts.
(To switch ON, press Auto Operation Button once more for 10 seconds or more.)

Operation Hints
15
Adjust room temperature properly. Set the tem-
perature 1°C higher (Cooling Operation) or 2°C
lower (Heating Operation) than actually desired.
Approximately 10% of electricity costs can be
saved.
Clean the air filter regularly. Blockage in the air
filter reduces the airflow and lowers the cooling
or heating. Clean at least once every 2 weeks.
Otherwise, about 6% of electricity cost will be
wasted.
Prevent wastage with the Timer. Use Timer
when sleeping or going out to save electricity
cost.
Do not block the air outlet vents at outdoor unit.
Otherwise, it will lower the cooling or heating
performance.

16
Make sure that the doors and windows are shut.
Otherwise, cooling and heating performance will
be reduced and electricity cost is wasted.
Keep blinds or curtains closed. Do not let sun-
shine enter the room directly. About 5% of
electricity cost can be saved.
Proper airflow direction adjustment. Set the air-
flow direction louvers horizontal for Cooling
Operation and downwards for Heating Opera-
tion. Operation result will be better.
Use insulating material for better performance.
Use insulating material during construction or
renovations. It will save electricity cost.

Better Care and Maintenance
17
Regular care and maintenance will extend the life of the air conditioner and prevent wastage of electricity. Before
performing any maintenance procedure, be sure to switch off the main power supply.
Caution
Do not use water or volatile liquids.
Do not make air conditioner wet, as there is the danger that it could
cause electric shocks.
Be sure not to apply water when cleaning or at any other time.
Using water above 40°C could cause deformation and/or discolouration.
Volatile liquids such as thinner or benzene may damage the air condi-
tioner.
Cleaning the air conditioner and air filters
Once every 2 weeks is recommended.
Clean the air conditioner.
Wipe gently with a soft, dry cloth. Clean the air filters.
To remove the dust adhering to the filters,
either use a vacuum cleaner, or wash them
in water and dry in the shade.
Re-insert the filters correctly at the left and right,
with the side marked [FRONT] facing forward.
Purchase replacement filters from your air con-
ditioner dealer if the air filters become damage.
Air Filter No. C4209-180
B
E
N
Z
E
N
E
T
H
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18
Replacement of air purifying filters
Recommended about once every 3 months.
1
Remove the air filters.
Air filter
2
Remove the air purifying
filters.
purifying filter
3
Remove the filters from the
filter frame.
Filters
1
Operate the air condi-
tioner for 2 to 3 hours.
Type of operation: Cooling.
Temperature setting: 30°C
2
For air conditioners with a
power plug, stop operation
by remote control and pull
out the power plug.
Note: If the unit is not off by
remote control, the
unit will operate
when you plug in
(because of Auto-
restart Control is
provided).
3
Remove the batteries
from the remote control.
The indoor unit within a three month period, replace the purifying filters.
Re-insert the filters correctly at the left and right with the side marked
[FRONT] facing forward.
Dusty filters cannot be re-used, even if they are cleaned and washed.
Purchase replacement filters from your air conditioner dealer.
Part number for air purifying filters: CZ-SFD30N
<Note>
When not using the air conditioner for a long period
Pre-season inspection (The earlier the better)
Is the discharge air
cold (warm)?
Operation is normal if, 15 min-
utes after the start of operation,
the temperature difference be-
tween the air intake and outlet
vents is 8°C or above for cool-
ing and 14°C or above for heat-
ing
Are the air outlet vents
and air intake vents
obstructed?
Is the drain hose
cracked or crushed? Are the remote control batteries in
good condition?
In order to dry out the
internal mechanisms
Caution
Be careful not to
hurt your hands
on metal parts.
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Troubleshooting
19
Normal operation
Air conditioner has been
restarted, but does not
operate for 3 minutes.
This is to protect the air conditioner. Wait until
the air conditioner begins operating.
Soft Dry Mode Operation is a very gentle Cooling
Operation consisting primarily of dehumidifying.
The air conditioner may stop for approximately 6
minutes in order to prevent overcooling.
If the room temperature rises again, the operation
will recommence.
If the airflow begins before its temperature be-
come warm, it will cause an undesired cooling ef-
fect. In order to prevent this, the airflow will not
begin until it is sufficiently warm.
(The operation lamp will blink until the airflow
begins.)
This may be a damp smell exuded by the walls,
carpet, furniture or clothing in the room.
This is the sound of refrigerant flowing inside the
air conditioner unit.
This is the sound of reversing the freon flow in-
side the unit at the starting and finishing the de-
frosting during Heating operation.
Condensation occurs when the airflow from the
air conditioner cools the room air.
This is to remove the smell exuded by the
surroundings.
This is to melt the frost which has accumulated on the outdoor
unit (Defrosting Operation). This will take no longer than about
12 minutes, so wait for operation. (Frost accumulates on the
outdoor unit when the outdoor temperature is low and the hu-
midity is high.) Water comes out from the outdoor unit.
During Soft Dry Mode
Operation, the air condi-
tioner stops.
Airflow does not begin
immediately during Heating
Operation.
The room has a peculiar
odour.
A sound like water flowing
can be heard. A noise that
sounds like the com-
pressed air releasing into
atmosphere
It seems that fog is coming
out from the air
conditioner.
Operation stops for about
12 minutes during heating.
(The operation lamp
blinks.)
During Automatic Airflow
Volume setting, indoor fan
stops occasionally.
QIs it okay? AThis is the answer.