Panasonic Cs Mksxxnb4ucz 18bt1u Operating Instructions Manual

							Operating Instructions APPENDIX A
(852-6-4181-216-00-1)
CS-MKS9NB4U & CZ-18BT1U
CS-MKS12NB4U & CZ-18BT1U
A-1 
						

							Split System Air Conditioner
Model No.
Panasonic Corporation
1006 Kadoma, Kadoma City, Osaka, Japan
85264181216001
Indoor Units
CS-MKS9NB4U
CS-MKS12NB4U
Outdoor Units
CU-3KS19NBU
CU-4KS24NBU
CU-4KS31NBU
Operating Instructions
Before operating the unit, read these operating instructions thoroughly and keep them for future reference.
CV6233187624
This air conditioner uses the refrigerant R410A. Ceiling Panel
CZ-18BT1U 
						

							2
FEATURES
This air conditioner is an inverter type unit that automatically adjusts capability as appropriate. Details on these functions are provided below; 
refer to these descriptions when using the air conditioner.
• Microprocessor Controlled Operation
The interior compartment of the remote controller contains 
several features to facilitate automatic operation, easy 
logically displayed for easy use.
• Simple One-touch Remote ControllerThe remote controller has several features to facilitate 
automatic operation.
• 24-Hour ON or OFF TimerThis timer can be set to automatically turn the unit on or off 
at any time within a 24 hour period.
• 1-Hour OFF TimerThis timer can be set to automatically turn off the unit at 
any time after one hour.
• Night SetbackThis function saves energy by controlling operation to 
provide a quieter operating sound than normal.
• Automatic and 3-step Fan SpeedAuto/High/Medium/Low
• Air Sweep ControlThis function moves a flap up and down in the air outlet, 
directing air in a sweeping motion around the room and 
providing comfort in every corner.
• Auto. Flap ControlThis automatically sets the flap to the optimum position 
during cooling and drying operation.
• Automatic Restart Function for Power FailureEven when power failure occurs, preset programmed 
operation can be reactivated once power resumes.
• High Power OperationThe unit operates at maximum output for 30 minutes, 
regardless of the desired temperature.
The fan speed is 1 step above “High”.
CONTENTS
Page
FEATURES ................................................................................. 2
PRODUCT INFORMATION ........................................................ 2
SAFETY PRECAUTIONS ........................................................... 2
INSTALLATION LOCATION ........................................................ 3
ELECTRICAL REQUIREMENTS ............................................... 3
SAFETY INSTRUCTIONS.......................................................... 3
NAMES OF PARTS .................................................................... 4
USING THE REMOTE CONTROLLER ...................................... 8
OPERATION WITH THE REMOTE CONTROLLER................... 9
1. Operation .................................................................... 9
2. Adjusting the Fan Speed ............................................. 9
3. Fan Only ...................................................................... 9
4. Night Setback Mode .................................................. 10
5. HIGH POWER Mode................................................. 10
Page
SPECIAL REMARKS .....................................................10
SETTING THE TIMER ...................................................10
USING THE 1-HOUR OFF TIMER ................................12
TIPS FOR ENERGY SAVING........................................12
ADJUSTING THE AIRFLOW DIRECTION ....................12
OPERATION WITHOUT THE REMOTE CONTROLLER ... 13
CARE AND CLEANING .................................................13
TROUBLESHOOTING (BEFORE CALLING FOR SERVICE) ... 15
OPERATING RANGE ....................................................15
WIRED REMOTE CONTROLLER .................................15
SPECIFICATIONS .........................................................16
PRODUCT INFORMATION
If you have problems or questions concerning your Air 
Conditioner, you will need the following information. Model 
and serial numbers are on the nameplate on the bottom of 
the cabinet.
Model No.  __________________________________
Serial No. ___________________________________
Date of purchase _____________________________
Dealer’s address _____________________________
Phone number _______________________________
SAFETY PRECAUTIONS
The following symbols used in this manual, alert you 
to potentially dangerous conditions to users, service 
personnel or the appliance:
This symbol refers to a hazard or unsafe 
practice which can result in severe 
personal injury or death.
This symbol refers to a hazard or unsafe 
practice which can result in personal 
injury or product or property damage.
CAUTION 
						

							3
INSTALLATION LOCATION
• We recommend that this air conditioner be installed 
properly by qualified installation technicians in 
accordance with the Installation Instructions 
provided with the unit.
• Before installation, check that the voltage of the electric 
supply in your home or office is the same as the voltage 
shown on the nameplate.
Avoid: 
To protect the air conditioner from heavy corrosion, avoid installing 
the outdoor unit where salty sea water can splash directly onto it or 
in sulphurous air near a spa.
ELECTRICAL REQUIREMENTS
1.All wiring must conform to the local electrical codes. 
Consult your dealer or a qualified electrician for details.
2.Each unit must be properly grounded with a ground (or 
earth) wire or through the supply wiring.
3.Wiring must be done by a qualified electrician.
Pull off the power plug from a receptacle, or switch off the breaker, or 
switch off the power disconnecting mean to isolate the air conditioner 
from the main power supply when not in use for a long time.
SAFETY INSTRUCTIONS
• Read this Instruction Manual carefully before using 
this air conditioner. If you still have any difficulties 
or problems, consult your dealer for help.
• This air conditioner is designed to give you 
comfortable room conditions. Use this only for its 
intended purpose as described in this Instruction 
Manual.
• Do not install this air conditioner 
where there are fumes or flammable 
gases, or in an extremely humid space 
such as a greenhouse.
• Do not install the air conditioner where 
excessively high heat-generating 
objects are placed.
• Confirm to authorized dealer or specialist on usage of 
specified refrigerant type.
Using of refrigerant other than the specified type may cause 
product damage, burst and injury etc.
• Never touch the unit with wet hands.
• Never use or store gasoline or other flammable vapor or 
liquid near the air conditioner — it is very dangerous.
• Do not use this appliance in a potentially explosive 
atmosphere.
• This air conditioner has no ventilator for intaking fresh air 
from outdoors. You must open doors or windows frequently 
when you use gas or oil heating appliances in the same 
room, which consume a lot of oxygen from the air. 
Otherwise there is a risk of suffocation in an extreme case.
• Do not swallow the battery.
• After removing the battery from remote controller, keep it 
away from the reach of children. The battery can cause 
death by suffocation if swallowed.
• When inserting the battery, make sure the polarities 
(+ and -) are correct.
NOTE
• To prevent possible hazards from insulation failure, 
the unit must be grounded.
• Do not clean inside the indoor and outdoor units by users. 
Engage authorized dealer or specialist for cleaning.
• In case of malfunction of this appliance, do not repair by 
yourself. Contact to the sales dealer or service dealer for a 
repair.
• Refrigerant gas leakage may cause fire.
• For safety, be sure to turn the air conditioner off and 
also to disconnect the power before cleaning.
• Pull off the power plug from a receptacle, or switch off the 
breaker, or switch off the power disconnecting mean to 
isolate the air conditioner from the main power supply in 
case of emergency.
• Do not turn the air conditioner on and off from the power 
mains switch. Use the ON/OFF operation button.
• Do not stick anything into the air outlet of the outdoor unit. 
This is dangerous because the fan is rotating at high 
speed.
• Do not touch the air inlet or the sharp aluminum fins 
of the outdoor unit. You may get injured.
• Keep the fire alarm and the air outlet at least 1.5m away from 
the unit.
• Do not let children play with the air conditioner.
• Do not cool or heat the room too much if babies or invalids 
are present.
• Do not sit or step on the unit. You may fall down 
accidentally.
• Do not stick any object into the FAN CASE.
You may be injured and the unit may be damaged.
• 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 receiver.
• Connect the equipment into 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 modifications 
not expressly approved by the party responsible for compliance 
could void the user's authority to operate this equipment. 
CAUTION
NOTICE 
						

							4
NAMES OF PARTS
This illustration is based on the external view of a standard model.
Consequently, the shape may differ from that of the air conditioner 
which you have selected.
This air conditioner consists of an indoor unit and an outdoor unit. 
You can control the air conditioner with the remote controller.
UNIT DISPLAY AND OPERATION 
BUTTON
Avoid using radio equipment such as mobile phone near (within 
4 ft. (1.2 m)) the remote control receiver. Some radio equipment 
may cause malfunction of the unit.
If the trouble happens, disconnect power and restart the air 
conditioner after a few minutes.
The unit’s display lamps are dimmed during operation in the NIGHT 
SETBACK mode.
Air IntakeAir from the room is drawn into this section and 
passes through air filters which remove dust.
Air OutletConditioned air is blown out of the air 
conditioner through the air outlet.
Remote 
ControllerThe remote controller controls power ON/OFF, 
operation mode selection, temperature, fan 
speed, timer setting, and air sweeping.
Refrigerant 
TubesThe indoor and outdoor units are connected by 
copper tubes through which refrigerant gas 
flows.
Drain HoseMoisture in the room condenses and drains off 
through this hose.
Outdoor 
(Condensing) 
UnitThe outdoor unit contains the compressor, fan 
motor, heat exchanger coil, and other electrical 
components.
INDOOR UNIT
Air Intakes
Remote Controller
Refrigerant Tubes
Drain Hose OUTDOOR UNIT
Air Outlet Air Outlet!
(4 locations)
NOTE
REMOTE 
CONTROL 
receiverThis section picks up infrared signals from the 
remote controller (transmitter).
OPERATION 
button When the remote controller cannot be used, 
pressing this button enables cooling operation.
Each time this button is pressed, the operation 
mode changes cyclically. 
OPERATION 
lampThis lamp lights when the system is in the 
continuous DRY (orange), COOL (green) and 
FAN (green) mode.
TIMER lampThis lamp lights when the system is being 
controlled by the timer.
HIGH POWER 
lampThis lamp lights during operation in the HIGH 
POWER mode.
REMOTE CONTROL receiver
OPERATION lamp 
TIMER lamp OPERATION button
HIGH POWER lampINDOOR UNIT
IMPORTANT
Cooling operationStop
NOTE 
						

							5
REMOTE CONTROLLER (DISPLAY)
(1) Operation mode
MILD DRY ..............................
COOL .....................................
FAN ........................................
(2) Fan speed
Automatic operation ...............
HIGH .....................................
MEDIUM.................................
LOW .......................................
(3) Temperature setting 
60–86°F
When set to 80 °F 
temperature indication............(4) Timer
24-hour clock with ON/OFF 
program Timer .......................
ON Timer. ..............................
OFF Timer. ............................
1-hour OFF Timer. .................
(5) NIGHT SETBACK ..................
(6) Confirmation
of transmission.......................
(7) Auto. flap indication................
Flap angle indication ..............
Sweep indication....................
(8) High power operation.............
Displayed when setting timerDisplayed when transmitting data
Displayed when indoor unit sensor is 
in use
Displayed when setting temperature
Displayed when temperature is shown
Displayed when the time
display is set to 12-hour
time.
Symbols 
						

							6
REMOTE CONTROLLER
Transmitter
When you press the buttons on the remote controller, the  mark 
appears in the display to transmit the setting changes to the receiver 
in the air conditioner.
Display
Information on the operating conditions is displayed while the remote 
controller is switched on. If the unit is turned off, FLAP setting and 
FAN SPEED setting are not displayed.
FAN SPEED selector button
: The air conditioner automatically decides the fan speeds.
: High fan speed
: Medium fan speed
: Low fan speed
FLAP button
Press this button either to select the setting of the airflow direction to the auto. 
flap in each mode or one of the six possible positions manually or to select the 
sweep function which moves the flap up and down automatically.
: Auto flap setting: If selected in a cooling or dry operation, the flap is set 
at position (7) in the following chart.
: The airflow direction can be set manually. (six positions)
: The flap moves up and down automatically.
When you press the FLAP button, the air flow direction will be changed one by 
one as follows.
NOTE
SWEEP
CANCEL button
SENSOR button
When you press this button (use a small-tipped object such as a ballpoint 
pen), the   mark will appear at the display. And the room temperature is 
detected by the sensor which is built into the indoor unit and the air 
conditioner is controlled accordingly.
If the remote controller is located near a heat source, such as a space 
heater or in direct sunlight, press the SENSOR button to switch to the 
sensor on the indoor unit.
NOTE
ADDRESS switch
• The address switch changes to prevent mixing of signals from remote controller’s when 
two air conditioners are installed next to each other. Normally, the address switch is set 
to A. For more information, please contact the dealer where you made the purchase.
• Normally, the tabs on the remote controller should not be bent.
ON TIME/OFF TIME setting buttons
Advance button
Return button
No display: The timer does not operate.
: The air conditioner starts at the set time.
: The air conditioner stops at the set time.
:  The air conditioner stops and starts, or starts and 
stops, at the set times every day. For details, see 
“SETTING THE TIMER”.
HIGH POWER button
:  If this button is pressed during DRY, COOL or FAN operation, the unit 
operates at maximum output for 30 minutes, regardless of the 
desired temperature.
The fan speed is 1step above ‘‘HIGH’’.
Temperature display selector button
This switches the temperature display 
between °C and °F. 
						

							7
Sensor
A temperature sensor inside the remote controller senses the room 
temperature.
(Cover closed) CLOCK button
ACL button (ALL CLEAR)
Puts the remote controller into pre-operation status. Always press this button 
after replacing the batteries.
ON/OFF operation button
This button is for turning the air conditioner on and off.
1 HR. TIMER button (1-HOUR OFF TIMER)
:  When you press this button, regardless of whether the unit is operating 
or stopping, the unit operates for one hour and then shuts down.
Temperature setting buttons (TEMP.)
Press the   button to increase the set temperature.
Press the   button to reduce the set temperature.
The temperature setting changes by 1 °C or 2 °F each time one of the TEMP. 
buttons is pressed.
MODE selector button
Use this button to select DRY, COOL or FAN mode.
(DRY): The air conditioner reduces the humidity in the room.
(COOL): The air conditioner makes the room cooler.
(FAN): The air conditioner works only as a circulation fan.
NIGHT SETBACK button
For details, see “4. Night Setback Mode”. When you press this button in the 
DRY or COOL mode, the   mark appears in the display, and the remote 
controller will automatically adjust the set temperature to save energy.
Time display selector button
This switches the time display between 24-hour time and 12-hour time.
• The illustration above pictures the remote controller after the cover has been opened.
• The remote controller sends the temperature signal to the air conditioner regularly at five minute intervals. If the signal from the 
remote controller stops for more than 15 minutes due to the loss of the remote controller or other trouble, the air conditioner will 
switch to the temperature sensor which is built into the indoor unit and control the room temperature. In these cases, the 
temperature around the remote controller may differ from the temperature detected at the air conditioner’s position.
• The indoor fan runs continuously when the system is in normal operation. It does not turn off when the desired room temperature is 
reached. If Night Set Back mode is selected, the fan will turn off intermittently during cooling operation in order to control air flow.
NOTE 
						

							8
USING THE REMOTE CONTROLLER
HOW TO INSTALL BATTERIES
1.Slide the cover in the direction indicated by the arrow and remove 
it.
2.Install two AAA alkaline batteries. Make sure the batteries point in 
the direction marked in the battery compartment.
3.Use a thin object such as the tip of a pen to press the ACL button.
HOW TO USE THE REMOTE CONTROLLER
When using the remote controller, always point the unit’s transmitter 
head directly at the air conditioner’s receiver.
REMOTE CONTROLLER INSTALLATION 
POSITION
The remote controller may be operated either from a non-fixed 
position or from a wall-mounted position. To ensure that the air 
conditioner operates correctly, do not install the remote controller in 
the following places:
• In direct sunlight
• Behind a curtain or other places where it is covered
• More than 26 ft.(8 m) away from the air conditioner
• In the path of the air conditioner’s airstream
• Where it may become extremely hot or cold
• Where it may be subject to electrical or magnetic noise
• Where there is an obstacle between the remote controller and air 
conditioner (since a check signal is sent from the remote controller 
every 5 minutes)
MOUNTING THE REMOTE CONTROLLER
Before mounting the remote controller, press the ON/OFF operation 
button at the mounting location to make sure that the air conditioner 
operates from that location. The indoor unit should make a beeping 
sound to indicate that it has received the signal.
To take out the remote controller, pull it forward.
WHEN HOLDING THE REMOTE CONTROLLER
• When using the remote controller and during air conditioner 
operation, the transmitter on the remote controller should be 
pointed towards the receiver on the indoor unit.
• Make sure that there are no objects between the remote controller 
and receiver which could block the signal.
• The batteries last about six months, 
depending on how much you use the 
remote controller. Replace the 
batteries when the remote controller’s 
display fails to light, or when the 
remote controller cannot be used to 
change the air conditioner’s settings.
• Use two fresh leak-proof type-AAA 
alkaline batteries.
• In replacing batteries, follow the 
instructions as mentioned in the 
subsection “HOW TO INSTALL 
BATTERIES”.
• If you do not use the remote controller 
more than 1 month, take out the 
batteries.
• Dispose of the used batteries at the 
designated location in compliance 
with the applicable local ordinances.
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.
ACL button
CAUTION
Pb
Air Conditioner 
(Indoor unit)
Receiver
Remote Controller(Transmitter 
head)
• To prevent loss of the remote 
controller, you can connect the 
remote controller to the holder by 
passing a string through the remote 
controller and attachment hole.
Remote Control  Holder
Mounting Screws
5/32 x 5/8"
(4 x 16 mm)
(included)Rear Side
Hole Press
Set in 
place 
						

							9
OPERATION WITH THE REMOTE CONTROLLER
1.  Operation 2.  Adjusting the Fan Speed
A. Automatic fan speed
Simply set the FAN SPEED selector button to the   
position.
This automatically sets the best fan speed for the room 
temperature.
B. Manual fan speed
If you want to adjust fan speed manually during operation, 
just set the FAN SPEED selector button as desired. [ , 
, or  ]
3.  Fan Only
Check that the circuit breaker on the power panel is 
turned on.
Press the setting buttons as described below and 
change the settings as desired.
STEP 1Press the MODE selector button 
and select the desired mode.
For dehumidifying operation
For cooling operation
For fan only operationo
o
o
STEP 2To start the air conditioner, press the ON/
OFF operation button.
STEP 3Press the TEMP. setting buttons to change 
the temperature setting to the desired 
temperature.
Adjustable temperature range:
STEP 4Set the FAN SPEED selector button to the 
setting you want.
STEP 5Press the FLAP button and set the airflow 
direction as desired.
(Refer to “ADJUSTING THE AIRFLOW 
DIRECTION” on page 12.)
To stop the air conditioner, press the ON/OFF 
operation button again.
• Choose the best position in the room for the remote 
controller, which also acts as the sensor for room 
comfort and transmits the operating instructions. 
Once you’ve found this best position, always keep the 
remote controller there.
• This appliance has a built-in 5-minute time delay 
circuit to ensure reliable operation. When the 
operation button is pressed, the compressor will start 
running within three minutes. In the event of power 
failure, the unit will stop. 
STEP 2
STEP 1 STEP 3
STEP 4
STEP 5
NOTE
30 °C max. 
16 °C min.or 86 °F max. 
60 °F min.
NOTE
If you want to circulate air without any temperature 
control, follow these steps:
STEP 1Press the MODE selector button to switch to 
the fan mode  .
STEP 2Press the ON/OFF operation button.
STEP 3Press the FAN SPEED selector button to 
select the fan speed of your choice ( , 
 or  ).
STEP 2
STEP 1
STEP 3