Panasonic Cs Mksxxnb4ucz 18bt1u Operating Instructions Manual

							10
4.  Night Setback Mode
Night Setback Mode is used for saving energy.
Press the NIGHT SETBACK button while unit is operating. 
The   mark appears in the display.
To release the night setback function, press the NIGHT SETBACK 
button again.
In Cooling and DRY Mode: ( and  )
5.  HIGH POWER Mode
HIGH POWER mode can be used to increase the output of the 
indoor unit for all operation modes.
Press the HIGH POWER button while unit is operating.
The   mark appears in the display. 
To cancel, press HIGH POWER button again.
• When the HIGH POWER button is pressed, the unit operates at 
maximum output for 30 minutes, regardless of the desired 
temperature. The fan speed is 1 step above “High”.
Depending on the operating conditions, the fan speed may be 
increased by a small amount only.
SPECIAL REMARKS
How it works?
• Once the room temperature reaches the level that was set, the 
unit’s operation frequency is changed automatically.
• During DRY operation, the fan speed automatically runs at lower 
speed for providing a comfortable breeze.
• ‘‘DRY’’ operation is not possible if the indoor temperature is 59 °F 
or less.
• Sometimes the indoor unit may not get to the set fan speed such as 
LOW under cool operation at very low outdoor temperatures due to 
the indoor unit being protected from ice or frost when combined with 
the outdoor unit for Low Ambient Cooling models.
• In the event of power failure, the unit will stop. When the power is 
resumed, the unit will restart automatically in approximately 
5 minutes by the remote controller.
Clicking sound is heard from the air conditioner
• In cooling operation, any plastic parts may shrink due to a sudden 
temperature change. In this event, a clicking sound may occur. This 
is normal, and the sound will soon disappear.
• The remote controller sends the setting condition to the air 
conditioner regularly at five minute intervals.
SETTING THE TIMER
In the descriptions below, the following settings are used for the 
temperature and time indicator selector button on the bottom front 
section of the remote controller.
• Temperature: °F
• Time: AM, PM
Setting
temperature
Press the NIGHT 
SETBACK button
30 min.30 min.Time
2°F2°F
When the night setback mode is selected, the air conditioner 
automatically raises the temperature setting 2 °F when 30 minutes 
have passed after the selection was made, and then another 2 °F 
after another 30 minutes have passed, regardless of the indoor 
temperature when night setback was selected. This enables you 
to save energy without sacrificing comfort. This function is 
convenient when gentle cooling is needed.
NOTE
‘‘DRY’’ ( ) Operation
Cooling ( ) operation
Power failure during operation
Clicking Sound
Remote Controller
NOTE 
						

							11
1.  How to set the present time
(Example) To set to 10:30 pm.
2.  How to set the OFF time
(Example) To stop the air conditioner at 11:00 am.
3. How to set the ON time
(Example) To start operation at 7:10 am.
4. How to set daily ON/OFF repeat timer
(Example) To start operation at 7:10 am. and stop the air conditioner 
at 11:00 am.
• The ON/OFF combination timer uses the current time as the 
reference, and it is activated starting from whichever set time 
comes first.
• With the ON/OFF combination timer, the settings are repeated 
ever y day.
• You can check the timer ON/OFF times after you have set them by 
pressing the ON TIME and OFF TIME setting buttons.
To cancel a timer program
• Press the CANCEL button.
• When either an ON or OFF timer is to be canceled, press the 
button corresponding to the timer whose program is to be 
canceled, and then press the CANCEL button.
• The airflow direction, fan speed and temperature setting can be 
changed after a timer program has been set even when the unit is 
stopped. Even when operation is stopped during an ON timer 
program, the unit will start operating when the set time is reached 
provided that the program is not canceled.
• When the ON timer and OFF timer are set to the same time, the 
timer operates as if it is turned off.
Operation Indication
1.Press the CLOCK button 
once if the time indicator is 
not flashing.The time indication alone 
flashes.
2.Press the Advance, Return 
( ,  ) button until PM 10:30 
is displayed.The time can be set in 1-minute 
increments. Holding down the 
button advances the time rapidly 
in 10-minute increments.
3.Press the CLOCK button 
again.This completes the setting of the 
current time.
Operation Indication
1.Press the OFF TIME setting 
button once.The timer   indication is 
displayed, and the present OFF 
time is shown.
2.Press the Advance, Return 
( ,  ) button until AM 11:00 
is displayed.The timer   indication 
blinks.
The time can be set in 10-minute 
increments. Holding down the 
button advances the time rapidly 
in 10-minute increments.
3.Wait a few seconds, and then 
the setting is complete.The timer   indication 
stops blinking and the present 
time is displayed.
Operation Indication
1.Press the ON TIME setting 
button once.The timer   indication is 
displayed, and the present ON 
time is shown.
2.Press the Advance, Return 
( ,  ) button until AM 7:10 
is displayed.The timer   indication 
blinks.
The time can be set in 10-minute 
increments. Holding down the 
button advances the time rapidly 
in 10-minute increments.
3.Wait a few seconds, and then 
the setting is complete.The timer   indication 
stops blinking and the present 
time is displayed.
Operation Indication
1.Set the timer ON/OFF times 
as shown in 2-1, 2, 3 and 3-1, 
2, 3.The present time 10:30 pm. and 
 are displayed.
7:10 am. 
ON11:00 am. 
OFF 10:30 pm. 
Present time
NOTE
NOTE 
						

							12
USING THE 1-HOUR OFF 
TIMER
1. 1-Hour OFF Timer
This function causes the unit to operate for one hour and then 
stop, regardless of whether the unit is on or off when this 
button is pressed.
The   indicator in the display indicates that this function is 
operating.
Setting procedure:
Regardless of whether the unit is operating or stopped, press the 1 
HR. TIMER button.
 appears in the display.
Cancellation procedure:
Press the ON/OFF operation button to turn the unit off, wait for the 
unit to stop operating, and then press the ON/OFF operation button 
again. 
The 1-Hour Timer function is now cancelled and the unit operates 
normally.
• If, while the 1-Hour Timer function is operating, the 1HR. TIMER 
button is pressed once to cancel the function and then again, the 
unit continues to operate for one hour from that point in time and 
then stops.
• It is not possible to use the OFF Timer and 1-Hour OFF Timer 
together. Whichever function is set last takes precedence. If the 1 
HR. TIMER button is pressed while the TIMER OFF function 
operates, the OFF Timer is cancelled and the unit will stop 
operating one hour later.
2. Operation together with the daily ON/OFF 
repeat timer
The 1-Hour OFF Timer setting is given priority over the DAILY ON/
OFF REPEAT setting.
TIPS FOR ENERGY SAVING
Avoid
• Do not block neither the air intake nor the air outlet. It may 
cause less performance, and may leads to malfunctions.
• Do not let direct sunlight into the room. Use sunshades, blinds or 
curtains. If the walls and ceiling of the room are warmed by the 
sun, it will take longer to cool the room.
Do
• Always try to keep the air filter clean. (Refer to “CARE AND 
CLEANING”.) A clogged filter will impair the performance of the 
unit.
• To prevent conditioned air from escaping, keep windows, doors and 
any other openings closed.
ADJUSTING THE AIRFLOW 
DIRECTION
The vertical airflow can be adjusted by moving the flap with the 
remote controller. Do not move the flap with your hands. Confirm that 
the remote controller has been turned on. Use the FLAP button to 
set either the sweep function or one of the six airflow direction 
settings.
The flap automatically closes when the unit is off.
• Use the FLAP button on the remote controller to adjust the 
position of the flap. If you move the flap by hand, the flap 
position according to the remote controller and the actual 
flap position may no longer match. If this should happen, 
shut off the unit, wait for the flap to close, and then turn on 
the unit again; the flap position will now be normal again.
• Do not have the flap pointed down during cooling operation. 
Condensation may begin to form around the air vent and drip 
down.
NOTE
SWEEP
A. Sweep function 
The flap starts moving 
up and down to deliver 
air over the sweep 
range.
B. Setting the airflow manually
Referring to the above 
illustration, use the 
FLAP button to set the 
airflow direction within 
the range used during 
the cooling or 
dehumidifying operation.
C. Auto flap function 
The flap is set to 
the 
recommended 
position.
COOL
DRY
FA N
NOTE
CAUTION 
						

							13
OPERATION WITHOUT THE 
REMOTE CONTROLLER
If you have lost the remote controller or it has trouble, follow the 
steps below.
When the air conditioner is not running
Each time the OPERATION button is pressed, the operation mode 
changes cyclically.
The temperature is set to the room temperature minus 4°F during 
the cooling operation, and the fan speed and flap are set to Auto.
CARE AND CLEANING
Ceiling panel (Indoor Unit)
Clean the ceiling panel of the indoor unit with a vacuum cleaner 
brush, or wipe it with a clean, soft cloth.
If it is stained, use a clean cloth moistened with a mild liquid 
detergent. When cleaning it, be careful not to force the flaps out of 
place.
Cleaning the flaps
• The air outlet flap can be removed and washed with water.
• Be sure to always stop operation before removing the flap. 
• After washing with water, allow it to dry, and then remount it.
• Do not move the flap with your hands.
• When using a footstool or the like, be careful not to let it tip 
over.
Cleaning the main unit and Remote Controller
• Wipe clean using a soft, dry cloth.
• To remove stubborn dirt, moisten a cloth in warm water no hotter 
than 104 °F, wring thoroughly, and then wipe.
INDOOR UNIT
OPERATION button
OPERATION lamp 
Cooling operationStop
NOTE
• Cleaning and maintenance operations 
must be carried out by specially 
trained personnel.
While working in high places, slipping 
or falling may result in serious injury.
• For safety, be sure to turn the air 
conditioner off and also to disconnect 
the power before cleaning.
• Do not pour water on the indoor unit to 
clean it. This will damage the internal 
components and cause an electric 
shock hazard.
• Never use solvents, or harsh chemicals 
when cleaning the indoor unit. Do not 
wipe the plastic casing using very hot 
water. 
• Some metal edges and the fins are 
sharp and may cause injury if handled 
improperly; be especially careful when 
you clean these parts.
• The internal coil and other components 
of the outdoor unit must be cleaned 
every year. Consult your dealer or 
service center.
CAUTION
CAUTION 
						

							14
Air filter
The air filter collects dust and other particles from the air and should 
be cleaned once every 6 months.
If the filter gets blocked, the efficiency of the air conditioner drops 
greatly.
The frequency with which the filter should be cleaned depends on 
the environment in which the unit is used.
How to remove the filter
1.
Slide the two latches of the air intake grille with your thumbs in the 
direction of the arrow to open the grille.
2.Open the air intake grille downward.
3.Press the tabs on both sides of the air filter (indicated with   
marks on the grill) to release the filter, and then, lift and pull the 
filter up and out using the tabs to remove it.
4.Use a vacuum cleaner to remove light dust. If there is sticky dust 
on the filter, wash the filter in lukewarm, soapy water, rinse it in 
clean water, and dry it.
5.Insert the filter correctly again inside the grille, close the grille 
letting the latches slide towards the outside and fix again the 
latch.
How to remove the air intake grille
1.
Open the air intake grille.
2.Detach the safety cord from the frame (remember to attach it 
again after cleaning or maintenance).
3.Hold on the air intake grille and pull it towards you to detach the 
two air intake grille hinges.
4.Clean the grille gently using a soft sponge, or the like. Then dry it 
with care.
Neutral detergent may be used to remove stubborn dirt. Then 
rinse thoroughly with water and dry it.
Care: After a prolonged idle period
Check the indoor and outdoor unit air intakes and outlets for 
blockage; if there is a blockage, remove it.
Care: Before a prolonged idle period
• Operate the fan for half a day to dry out the inside.
• Disconnect the power supply and also turn off the circuit breaker.
• Clean the air filter and replace it in its original position.
• Outdoor unit internal components must be checked and cleaned 
periodically.
Contact your local dealer for this service.
NOTE
Latch
Air intake grille hingeCeiling 
panel Air intake 
grille
Air intake grille
Safety cord
Air filter
• When cleaning the air filter, never 
remove the safety cord. If it is 
necessary to remove it for servicing 
and maintenance inside, be sure to 
reinstall the safety cord securely (hook 
on the grille side) after the work.
• When the air intake grille has been 
opened, rotating parts (such as the 
fan), electrically charged areas, etc. will 
be exposed in the unit’s opening. Bear 
in mind the dangers that these parts 
and areas pose, and proceed with the 
work carefully.
• Periodically check the outdoor unit to 
see if the air outlet or air intake is 
clogged with dirt or soot.
Air intake grille hinge
Safety cord
CAUTION 
						

							15
TROUBLESHOOTING
(BEFORE CALLING FOR SERVICE)
If your air conditioner does not work properly, first check the following 
points before requesting service. If it still does not work properly, 
contact your dealer or service center.
OPERATING RANGE
The air conditioner is operable within the temperature ranges as 
listed below:
WIRED REMOTE CONTROLLER
A separately sold wired remote controller (CZ-RD515U) 
used with this air conditioner is also available. If you wish 
to use the wired remote control function, you will need to 
purchase the optional wired remote controller.
Trouble Possible Cause Remedy
Air conditioner does 
not run at all.1. Power failure.  1. Restore power.
2. Leakage circuit 
breaker tripped.2. Contact service 
center.
3. Line voltage is too 
low.3. Consult your 
electrician or 
dealer.
4. Batteries in remote 
controller have run 
down.4. Replace batteries.
OPERATION lamp 
blinks and air 
conditioner does not 
operate.Trouble in system. Contact service 
center.
Compressor runs but 
soon stops.Obstruction in front of 
condenser coil.
(Outdoor Unit)Remove obstruction.
Poor cooling 
performance.1. Dirty or clogged air 
filter.1. Clean air filter to 
improve airflow.
2. Heat source or 
many people in 
room.2. Eliminate heat 
source if possible.
3. Doors and/or 
windows are open.3. Shut them to keep 
the heat out.
4. Obstacle near air 
intake or air 
discharge port.4.  Remove it to ensure 
good airflow.
5. Thermostat is set 
too high for cooling.5.  Set the temperature 
lower.
Clicking sound is 
heard from the air 
conditioner.In cooling operation, 
any plastic parts may 
shrink due to a 
sudden temperature 
change. In this event, 
a clicking sound may 
occur.This is normal, and 
the sound will soon 
disappear.
OPERATION lamp 
lights but outdoor unit 
will not run.The use of cellular 
phones near the air 
conditioner may cause 
disturbance to its 
normal operation.1. Turn off the power 
then restart the air 
conditioner after a 
while.
2. Consult your dealer.
TIMER lamp blinks 
(3 sec. interval) and 
air conditioner does 
not operate.FLOAT SWITCH is 
actived.Contact service 
center.
Temperature Indoor air 
temperature Outdoor air 
temperature
COOLING Max.  95 °F DB / 
71 °F WB 115 °F DB
Min.  67 °F DB / 
57 °F WB 14 °F DB 
						

							16
SPECIFICATIONS
inch(mm) Model No.Ceiling Panel
CZ-18BT1U
6.0(2.7) 1-9/16×24-19/32×24-19/32
(40×625×625) Unit Dimensions (H×W×D)
Net Weight lbs. (kg) Model No.Indoor Unit
CS-MKS9NB4U
Single-phase, 208-230 V, 60 Hz
Heating Capacity
Operation
Sound
Unit Dimensions (H×W×D)
Net Weight Power Source
Cooling CapacitykW
BTU/h
kW
BTU/h
inch(mm)
lbs.(kg)
Cooling Operation (H/M/L)
Heating Operation (H/M/L)dB(A)
dB(A)33/32/31
- -
9,0002.65
-
11-5/32×22-5/8×22-5/8
(283×575×575)
35.3(16.0)34/32/31
- -
11,9003.50
-
11-5/32×22-5/8×22-5/8
(283×575×575)
35.3(16.0) CS-MKS12NB4U
Model No.Outdoor Unit
CU-4KS24NBU CU-3KS19NBU
Single-phase, 208-230 V, 60 Hz
Heating Capacity
Operation
Sound
Unit Dimensions (H×W×D)
Net Weight Power Source
Cooling CapacitykW
BTU/h
kW
BTU/h
inch(mm)
lbs.(kg)
Cooling Operation (Hi)
Heating Operation (Hi)dB(A)
dB(A)50
- -
18,800 [ 9,800 ~ 18,800 ]5.50 [ 2.90 ~ 5.50 ]
-
29-1/8×35-7/16×12-19/32
(740×900×320)
138.9(63.0)50
- -
25,400 [ 9,800 ~ 25,400 ]7.50 [ 2.90 ~ 7.50 ]
-
29-1/8×35-7/16×12-19/32
(740×900×320)
138.9(63.0)53
- -
30,600 [ 9,800™30,600 ] 9.00 [ 2.90 ~ 9.00 ]
-
35-1/32×35-7/16×12-19/32
(890×900×320)
174.2(79.0) CU-4KS31NBU