Panasonic Air Conditioner CS-S9NKUW-1, CU-S9NKU-1, CS-S12NKUW-1, CU-S12NKU-1, CS-S18NKU-1, CU-S18NKU-1, CS-S22NKU-1, CU-S22NKU-1, CU-2S18NBU-1 Operating Instructions

							F568314
ENGLISH  
Before operating the unit, read these operating 
instructions thoroughly and keep them for future 
reference.
QUICK GUIDEQUICK GUIDE
Operating Instructions
Air Conditioner
Model No.
Indoor Unit Single Split
Outdoor UnitOutdoor Unit
CS-S9NKUW-1 CU-S9NKU-1
CS-S12NKUW-1 CU-S12NKU-1
CS-S18NKU-1 CU-S18NKU-1
CS-S22NKU-1 CU-S22NKU-1
Multi Split
Outdoor Unit
CU-2S18NBU-1
© Panasonic Appliances Air-Conditioning Malaysia 
Sdn. Bhd. 2012. Unauthorized copying and distribution 
is a violation of law. 
						

							2
Thank you for purchasing
Panasonic Air  Conditioner
TABLE OF CONTENTSTABLE OF CONTENTS
SAFETY PRECAUTIONS
2~3
MULTI AIR CONDITIONER 
SYSTEM
4
INDOOR UNIT
5
REMOTE CONTROL
6~7
TROUBLESHOOTING
8
INFORMATION
9
QUICK GUIDE
BACK COVER
NOTENOTE
The illustrations in this manual are for 
explanation purposes only and may 
differ from the actual unit. They are 
subjected to change without notice for 
future improvement.
OPERATION CONDITIONOPERATION CONDITION
Use this air conditioner under the following 
temperature range
Temperature (˚F)Indoor
*DBT *WBT
COOLINGMax. 89.6 73.4
Min. 60.8 51.8
Temperature (˚F)Outdoor
*DBT *WBT
COOLINGMax. 109.4 78.8
Min. 60.8 51.8
* DBT:  Dry bulb temperature
* WBT:  Wet bulb temperature 
SAFETY PRECAUTIONS
To prevent personal injury, injury to others, or property damage, please 
comply with the following.
Incorrect operation due to failure to follow instructions below may cause 
harm or damage, the seriousness of which is classifi ed as below:
  WARNINGWARNINGThis sign warns of death or serious injury.
  CAUTIONCAUTION 
This sign warns of injury or 
damage to property.
The instructions to be followed are classifi ed by the following symbols:
This symbol denotes an action that is PROHIBITED.
   
These symbols denote an 
actions that is COMPULSORY.
 WARNINGWARNING
INDOOR UNIT AND OUTDOOR UNIT
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.
Please consult authorized dealer or specialist to clean the 
internal parts, repair, install, remove and reinstall the unit. 
Improper installation and handling will cause leakage, electric 
shock or fi re.
Confi rm to authorized dealer or specialist on usage of specifi ed 
refrigerant type. Using of refrigerant other than the specifi ed 
type may cause product damage, burst and injury etc.
Do not install the unit in a potentially explosive or fl ammable 
atmosphere. Failure to do so could result in fi re.
Do not insert your fi ngers or other objects into the air 
conditioner indoor or outdoor unit, rotating parts may 
cause injury.
Do not touch the outdoor unit during lightning, it may cause 
electric shock.
Do not expose yourself directly to cold air for a long period to 
avoid excess cooling.
Do not sit or step on the unit, you may fall down 
accidentally.
Air InletAir Inlet
Air OutletAir Outlet
Air OutletAir Outlet
Air InletAir Inlet
Outdoor 
Unit
Indoor 
Unit
Power
Supply
Remote
Control 
						

							ENGLISH
3
 CAUTIONCAUTION
INDOOR UNIT AND OUTDOOR UNIT
Do not wash the indoor unit with water, benzene, 
thinner or scouring powder to avoid damage or 
corrosion at the unit.
Do not use for preservation of precise 
equipment, food, animals, plants, artwork 
or other objects. This may cause quality 
deterioration, etc.
Do not use any combustible equipment in front of 
the airfl ow outlet to avoid fi re propagation.
Do not expose plants or pet directly to airfl ow to 
avoid injury, etc.
Do not touch the sharp aluminium fi n, 
sharp parts may cause injury.
Do not switch ON the indoor unit when waxing 
the fl oor. After waxing, aerate the room properly 
before operating the unit.
Do not install the unit in oily and smoky areas to 
prevent damage to the unit.
Do not dismantle the unit for cleaning purpose to 
avoid injury.
Do not step onto an unstable bench when 
cleaning the unit to avoid injury.
Do not place a vase or water container on the 
unit. Water may enter the unit and degrade the 
insulation. This may cause an electric shock.
Do not open window or door for long time during 
COOL/DRY mode operation.
Ensure drainage pipe is connected properly and 
keep drainage outlet clear of gutters, containers 
or does not immersed in water to prevent water 
leakage.
After a long period of use or use with any 
combustible equipment, aerate the room 
regularly.
After a long period of use, make sure the 
installation rack does not deteriorate to prevent 
the unit from falling down.
REMOTE CONTROL
Do not use rechargeable (Ni-Cd) batteries.It may damage the remote control.
To prevent malfunction or damage of the remote 
control:
•  Remove the batteries if the unit is not going to 
be used for a long period of time. 
•  New batteries of the same type must be 
inserted following the polarity stated. 
 WARNINGWARNING
REMOTE CONTROL
Do not allow infants and small children to play 
with the remote control to prevent them from 
accidentally swallowing the batteries.
POWER SUPPLY
Do not use a modifi ed cord, 
joint cord, extension cord or 
unspecifi ed cord to prevent 
overheating and fi re. 
To prevent overheating, fi re or electric shock:
•  Do not share the same power outlet with other 
equipment.
•  Do not operate with wet hands.
•  Do not over bend the power supply cord.
If the supply cord is damage, it must be replaced 
by the manufacturer, its service agent or similarly 
qualifi ed persons in order to avoid a hazard.
It is strongly recommended to install this unit 
using an Earth Leakage Circuit Breaker (ELCB) 
or Ground Fault Interrupt (GFCI) or Appliance 
Leakage Current Interrupt (ALCI) to prevent 
electric shock or fi re.
Stop using the product if any abnormality/failure 
occurs or turn off the power switch and breaker.
(Risk of smoke/fi re/electric shock)
Examples of abnormality/failure
•  The ELCB or GFCI or ALCI trip frequently. 
•  Burning smell is observed.
•  Abnormal noise or vibration of the unit is 
observed.
•  Water leaks from the indoor unit. 
•  Power cord becomes abnormally hot.
•  Fan speed cannot be controlled.
•  The unit stops running immediately even if it is 
switched on for operation.
•  The fan does not stop even if the operation is 
stopped.
Contact your local dealer immediately for 
maintenance or repair assistance.
This equipment must be earthed to prevent 
electrical shock or fi re.
Prevent electric shock by switching off the power:
- Before cleaning or servicing.
- Extended non-use.
- Abnormally strong lightning activity. 
						

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MULTI AIR CONDITIONER SYSTEM
Multi Split Outdoor Unit
(CU-2S18NBU-1)
DEFINITION
Multi air conditioner systems save space by letting you connect multiple indoor units to a single outdoor unit.
POWER SUPPLYPOWER SUPPLY
Models Number Time Delay FuseRated 
Vo l t s
Single Split SystemCS-S9NKUW-1 / CU-S9NKU-1 15 Amps
208/230V CS-S12NKUW-1 / CU-S12NKU-1 15 Amps
CS-S18NKU-1 / CU-S18NKU-1 20 Amps
CS-S22NKU-1 / CU-S22NKU-1 25 Amps
Multi Split SystemCS-S9NKUW-1, CS-S9NKUW-1 / CU-2S18NBU-1
25 Amps 208/230V CS-S9NKUW-1, CS-S12NKUW-1 / CU-2S18NBU-1
CS-S12NKUW-1, CS-S12NKUW-1 / CU-2S18NBU-1
Living roomLiving room
Multi Split Outdoor UnitMulti Split Outdoor Unit
INDOOR UNITINDOOR UNIT
• It is possible to operate the indoor units individually or simultaneously. The operation mode priority is given to the fi rst unit 
that turned on.
• During operation, heating and cooling mode can not be activated at the same time for different indoor unit. The power 
indicator blinks to indicate the indoor unit is standing by for different operation mode.
BedroomBedroom 
						

							ENGLISH
5
CAUTION• Switch off  the power at the circuit breaker before cleaning.
• Do not touch the aluminium fi n, sharp parts may cause injur y.
1
INDOOR UNIT
•  Wipe the unit gently with a soft, dry cloth.
2
FRONT PANEL
Remove Front Panel
•  Raise and pull to remove the front panel.
•  Wash gently and dry.
Close Front Panel
•  Press down both ends of the front panel to close it 
securely.
3
REMOTE CONTROL RECEIVER
4
ALUMINIUM FIN
5
HORIZONTAL AIRFLOW DIRECTION LOUVER
S9NKUW-1, S12NKUW-1
• Manually adjustable.
S18NKU-1, S22NKU-1
•  Do not adjust by hand.
6
VERTICAL AIRFLOW DIRECTION LOUVER
•  Do not adjust by hand.
7
AUTO OFF/ON BUTTON
•  Use when remote control is misplaced or a malfunction 
occurs.
Action Mode
Press once. Auto
Press and hold until 1 beep is heard, 
then release.Cooling
Press the button to turn off.
8
AIR PURIFYING FILTER
Vacuum the air purifying fi lter.
•  It is recommended to clean the fi lter every 6 months.
• Replace the fi lter every 3 years or replace any damaged 
fi lter.
Part no.: CZ-SA20P
9
AIR FILTERS
• Air fi lter cleaning is required every two weeks.
• Wash/rinse the fi lters gently with water to avoid damage 
to the fi lter surface.
• Dry the fi lters thoroughly under shade, away from fi re or 
direct sunlight.
•  Replace any damaged fi lters.
INDOOR UNIT
CLEANING  INSTRUCTIONSCLEANING  INSTRUCTIONSHINTHINT
•  Do not use benzene, thinner or scouring powder.
•  Use only soap ( pH7) or neutral household detergent.
•  Do not use water hotter than 104˚F.•  To ensure optimal performance of the unit, cleaning 
maintenance has to be carried out at regular intervals. 
Dirty unit may cause malfunction and you may see error 
code “H99”. Please consult authorized dealer.
2
5
6
7
14
3
98
POWER SUPPLY 
						

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REMOTE CONTROL
Maximum distance: 26ft
INDICATOR
 
POWER(Green)
 TIMER(Orange)
 QUIET(Orange)
 POWERFUL(Orange)
Press the remote control’s button
1
TO TURN ON OR OFF THE UNIT
•  Please be aware of the OFF indication on the remote 
control display to prevent the unit from starting/stopping 
improperly.
2
 TO SET TEMPERATURE
•  Selection range: 60°F ~ 86°F.
•  Operating the unit within the recommended temperature 
could induce energy saving.
COOL mode : 78˚F ~ 82˚F.
DRY mode : 2˚F ~ 4˚F lower than room temperature.
3
TO SELECT OPERATION MODE
AUTO mode - For your convenience
•  During operation mode selection the power indicator 
blinks.
•  Unit selects operation mode every 10 minutes according 
to temperature setting and room temperature (For Single 
Split System).
•  Unit selects operation mode every 3 hours according to 
temperature setting, outdoor and room temperature (For 
Multi Split System).
COOL mode - To enjoy cool air
•  Use curtains to screen off sunlight and outdoor heat to 
reduce power consumption during cool mode.
DRY mode - To dehumidify the environment
•  Unit operates at low fan speed to give a gentle cooling 
operation.
4
TO SELECT FAN SPEED (5 OPTIONS)
FAN SPEED
•  For AUTO, the indoor fan speed is automatically adjusted 
according to the operation mode.
5TO ADJUST VERTICAL AIRFLOW DIRECTION 
(5 OPTIONS)
AIR SWING
•  Keeps the room ventilated.
•  In COOL/DRY mode, if AUTO is set, the louver swing 
up/down automatically.
6
TO ADJUST AIRFLOW DIRECTION (5 OPTIONS)
AIR SWING
•  Keeps the room ventilated.
•  In COOL/DRY mode, if AUTO is set, the louver swing 
left/right and up/down automatically.
S18NKU-1, S22NKU-1
FAN SPEEDMODE
QUIET
TEMP
OFF/ON
AIR SWING
POWERFULTIM
ER
SET
ON
1
26
AUTO
COOL
DRYFAN
SPEED
AIR
SWING
FAN SPEED
AIR SWING
MODE
QUIET
TEMP
OFF/ON
POW
ERFUL
TIMER
SET
CAN
CEL ON
OFF1
23
SET
CHECK CLOC
KRESET ACRC
3
7
4
52
8
9
10
13
11
Remote Control display
1
12
S9NKUW-1, S12NKUW-1 
						

							ENGLISH
7
7
TO ENJOY QUIET OPERATION
•  This operation reduces airfl ow noise.
8TO REACH TEMPERATURE 
QUICKLY
•  Single Split System: This operation stops automatically 
after 20 minutes. 
•  Multi Split System: Press the button again or turn OFF the 
unit to stop this operation.
9Press and hold for 5 seconds to dim or restore the 
unit’s indicator brightness.
10Press and hold for approximately 10 seconds to 
show temperature setting in °C or °F.
11Press and hold for approximately 5 seconds to show 
12-hour (am/pm) or 24-hour time indication.
12
Press to restore the remote control’s default setting.
13
Not used in normal operations.
NOTESNOTES
QUIET
 , 
POWERFUL
•  Can be activated in all modes and can be cancelled by 
pressing the respective button again.
QUIET
 , 
POWERFUL
•  Cannot be selected at the same time.
TO SET THE TIMERTO SET THE TIMER
•  To turn ON or OFF the unit at a preset time.
ON
OFF1
2SET
Select ON or 
OFF timerSet the time Confi rm
•  To cancel ON or OFF timer, press 
ON or OFF then 
press 
CANCEL.
•  When ON Timer is set, the unit may start earlier (up 
to 15 minutes) before the actual set time in order to 
achieve the desired temperature on time.
•  Timer operation is based on the clock set in the 
remote control and repeats daily once set. For clock 
setting, please refer to Remote Control Preparation 
on the back cover.
•  If timer is cancelled manually or due to power failure, 
you can restore the previous setting (once power is 
resumed) by pressing 
SET. 
						

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TROUBLESHOOTING
The following symptoms do not indicate malfunction.The following symptoms do not indicate malfunction.
SYMPTOMSYMPTOMCAUSECAUSE
Mist emerges from indoor unit.►•  Condensation effect due to cooling process.
Water fl owing sound during operation.►• Refrigerant fl ow inside the unit.
The room has a peculiar odor.►•  This may be due to damp smell emitted by the wall, 
carpet, furniture or clothing.
Indoor fan stops occasionally during automatic fan speed 
setting.►•  This helps to remove the surrounding odours.
Operation is delayed a few minutes after restarting.►•  The delay is a protection to the unit’s compressor.
Outdoor unit emits water/steam.►•  Condensation or evaporation occurs on pipes.
TIMER indicator is always on.►•  The timer setting repeats daily once set.
POWER indicator blinks before the unit is switched on.►•  This is a preliminary step in preparation for the operation 
when the ON timer has been set.
Cracking sound during operation. ►•  Changes of temperature caused the expansion/
contraction of the unit.
Check the following before calling for servicing.Check the following before calling for ser vicing.
SYMPTOMSYMPTOMCHECKCHECK
Cooling operation is not working effi ciently.►•  Set the temperature correctly.
•  Close all doors and windows.
•  Clean or replace the fi lters.
•  Clear any obstruction at the air inlet and air outlet vents.
Noisy during operation.►•  Check if the unit has been installed at an incline.
•  Close the front panel properly.
Remote control does not work.
(Display is dim or transmission signal is weak.)►•  Insert the batteries correctly.
•  Replace weak batteries.
The unit does not work.►•  Check if the circuit breaker is tripped.
•  Check if timers have been set.
The unit does not receive the signal from the remote 
control.►•  Make sure the receiver is not obstructed.
• Certain fl uorescent lights may interfere with signal 
transmitter. Please consult authorized dealer.
The unit stops and the TIMER indicator blinks.
Use remote control to retrieve error code.
TIMER
SET
CANCEL ON
OFF1
23
SET CHECK CLOCK RESETAC
RC
1Press for 5 
seconds.
3Press for 5 
seconds to 
quit checking.
2Press until you hear 
beep sound, then 
write down the error 
code.Note:
•  For certain errors, you 
may restart the unit for 
limited operation with 4 
beeps when operation 
starts.
4  Turn the unit off and reveal the error code to authorized dealer. 
						

							ENGLISH
9
Information for Users on Collection and Disposal of Old Equipment and used Batteries
[Information on Disposal in other Countries 
outside the European Union]
These symbols are only valid in the European 
Union. If you wish to discard these items, 
please contact your local authorities or dealer 
and ask for the correct method of disposal.Note for the battery symbol (bottom two 
symbol examples): 
This symbol might be used in combination with 
a chemical symbol. In this case it complies with 
the requirement set by the Directive for the 
chemical involved. 
Pb
Contact your local hazardous waste disposal hotline.
FOR SEASONAL INSPECTION AFTER EXTENDED 
NON-USE
•  Check remote control batteries.
•  No obstruction at air inlet and air outlet vents.
•  Use Auto OFF/ON button to select Cooling operation.
  After 15 minutes of operation, it is normal to have the 
following temperature difference between air inlet and air 
outlet vents: 
Cooling: ≥ 14.4°F
FOR EXTENDED NON-USE
•  Switch off power at the circuit breaker.
•  Remove the remote control batteries.SERVICEABLE CRITERIAS
SWITCH OFF POWER AT THE CIRCUIT BREAKER then
please consult an authorized dealer under the following 
conditions:
•  Abnormal noise during operation.
•  Water/foreign particles have entered the remote control.
•  Water leaks from Indoor unit.
•  Circuit breaker switches off frequently.
•  Switches or buttons are not functioning properly.
INFORMATION
Model Number 
CS-S9NKUW-1 / CU-S9NKU-1
The above listed models have been designed and manufactured to meet ENERGY STAR® criteria for 
energy effi ciency when matched with appropriate coil components. However, proper refrigerant charge 
and proper air fl ow are critical to achieve rated capacity and effi ciency. Installation of this product should 
follow the manufacturer’s refrigerant charging and airfl ow instructions. Failure to confi rm proper charge 
and airfl ow may reduce energy effi ciency and shorten equipment life.
Federal Communications Commission Interference Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may 
not cause harmful interference, and (2) this device must accept any interference received, including interference that may 
cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of 
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential 
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in 
accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee 
that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or 
television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct 
the interference by one or more of the following measures:
•  Reorient or relocate the receiving antenna.
•  Increase the separation between the equipment and the receiver.
•  Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
•  Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: To assure continued compliance, follow the attached installation instructions. Any changes or modifi cations not 
expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment.
Industry Canada Notice
This Class B digital apparatus complies with Canadian ICES-003. 
						

							MEMO