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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 operation

Stop

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

Summary of Contents for CS-KS12NB41

Page 1: ...Operating Instructions APPENDIX A 852 6 4181 211 00 1 CS KS12NB41 CZ 18BT1U CU KS12NK1A CS KS18NB4UW CZ 18BT1U CU KS18NKU CS KS18NB4UW CZ 18BT1U CU KS18NKUA A 1 ...

Page 2: ...ing the unit read these operating instructions thoroughly and keep them for future reference CV6233187622 This air conditioner uses the refrigerant R410A Ceiling Panel CZ 18BT1U Multiple use is applied for the model CS KS18NB4UW only Single use means that only one indoor unit is connected with one outdoor unit in a one unit to one unit configuration Multiple use i e Flexi Multi system means that t...

Page 3: ...rates 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...

Page 4: ... 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...

Page 5: ...ure fan speed timer setting and air sweeping Refrigerant Tubes The indoor and outdoor units are connected by copper tubes through which refrigerant gas flows Drain Hose Moisture in the room condenses and drains off through this hose Outdoor Condensing Unit The outdoor unit contains the compressor fan motor heat exchanger coil and other electrical components INDOOR UNIT Air Intakes Remote Controlle...

Page 6: ...ogram 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 timer Displayed 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 1...

Page 7: ...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 swi...

Page 8: ...n 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 rem...

Page 9: ...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 ...

Page 10: ...AN SPEED selector button to the setting you want STEP 5 Press 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 v...

Page 11: ...oor 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 ...

Page 12: ...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 s...

Page 13: ...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 AIRFLO...

Page 14: ...ing 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 operation Stop NOTE Cleaning and maintenance operations must be carried out by specially trained pers...

Page 15: ... 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 f...

Page 16: ... 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 t...

Page 17: ...ration Outdoor Hi Indoor H M L Outdoor Hi Indoor H M L Heating Operation dB A dB A Indoor Unit CS KS12NB41 34 32 31 11 5 32 22 5 8 22 5 8 283 575 575 35 3 16 0 Indoor Unit CS KS18NB4UW 44 40 36 11 5 32 22 5 8 22 5 8 283 575 575 35 3 16 0 Outdoor Unit CU KS12NK1A 47 21 9 16 28 11 32 10 7 16 548 720 265 75 0 34 0 Outdoor Unit CU KS18NKU CU KS18NKUA 51 26 3 8 34 21 32 11 7 32 670 880 285 90 4 41 0 Mo...

Page 18: ... 575 35 3 16 0 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 Capacity kW 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...

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