APPENDIX A Operating Instructions CS-MKS7NKU CS-MKS9NKU CS-MKS12NKU (852-6-4181-214-00-2) A-1
Operating Instructions Split System Air Conditioner Model No. Indoor Units Outdoor Units CS-MKS7NKU CS-MKS9NKU CS-MKS12NKU CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU This air conditioner uses the refrigerant R410A. Before operating the unit, read these operating instructions thoroughly and keep them for future reference.
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.
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: Do not install this air conditioner where there are fumes or flammable gases, or in an extremely humid space such as a greenhouse.
• • • • • • CAUTION • • • • • • • • NOTICE 4 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.
NAMES OF PARTS Air Intakes INDOOR UNIT Air Outlet Remote Controller Drain Hose Refrigerant Tubes OUTDOOR UNIT Air Outlet NOTE 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 INDOOR UNIT IMPORTANT Avoid using radio equipment such as mobile phone near (within 4 ft. (1.2m)) the remote control receiver. Some radio equipment may cause malfunction of the unit. QUIET OPERATION button If the trouble happens, disconnect power and restart the air conditioner after a few minutes.
REMOTE CONTROLLER (DISPLAY) Displayed when transmitting data Displayed when indoor unit sensor is in use Displayed when setting temperature Displayed when temperature is shown Displayed when setting timer Displayed when the time display is set to 12-hour time. Symbols (1) Operation mode MILD DRY .............................. COOL ..................................... FAN ........................................ (2) Fan speed (4) Timer 24-hour clock with ON/OFF program Timer........................
REMOTE CONTROLLER Sensor Transmitter (Cover closed) Display ON/OFF operation button QUIET button 1 HR. TIMER button Temperature setting buttons (TEMP.
REMOTE CONTROLLER (CONTINUED) Temperature setting buttons (TEMP.) MODE selector button (DRY) (COOL) (FAN) FAN SPEED selector button 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. Use this button to select DRY, COOL or FAN mode. : The air conditioner reduces the humidity in the room. : The air conditioner makes the room cooler.
REMOTE CONTROLLER (CONTINUED) Temperature Display Selector button This switches the temperature display between °C and °F. Time Display Selector button This switches the time display between 24-hour time and 12-hour time. ACL button (ALL CLEAR) ADDRESS switch Puts the remote controller into pre-operation status. Always press this button after replacing the batteries.
USING THE REMOTE CONTROLLER (CONTINUED) 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. Air Conditioner (Indoor unit) Receiver (Transmitter head) Remote Controller Remote Controller Installation Position The remote controller may be operated either from a non-fixed position or from a wall-mounted position.
OPERATION WITH THE REMOTE CONTROLLER 1. Operation STEP 2 STEP 3 STEP 1 STEP 4 STEP 5 NOTE 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 1 Press the MODE selector button and select the desired mode. For dehumidifying operation o For cooling operation o For fan only operation o STEP 2 To start the air conditioner, press the ON/OFF operation button. STEP 3 Press the TEMP.
OPERATION WITH THE REMOTE CONTROLLER (CONTINUED) NOTE • 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.
OPERATION WITH THE REMOTE CONTROLLER (CONTINUED) 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. NOTE Pressing the MODE selector button cancels Night Setback mode.
OPERATION WITH THE REMOTE CONTROLLER (CONTINUED) 5. QUIET Mode QUIET Mode is used to reduce the fan sound of the indoor unit. Press the QUIET button. The mark appears in the display. To cancel, press QUIET button again. • • In QUIET Mode, the fan rotates at a slower speed than the fan speed setting. If the unit is already operating with a very low airflow, the fan sound may not change even if the QUIET button is pressed. 6.
SPECIAL REMARKS ‘‘DRY’’ ( ) Operation How it works? • • • Cooling ( ) Operation Power failure during operation 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.
SETTING THE TIMER NOTE 1. How to set the present time 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 (Example) To set to 10:30 pm. Operation 2. How to set the OFF time Indication 1. Press the CLOCK button once if the time indicator is not flashing. The time indication alone flashes. 2.
SETTING THE TIMER (CONTINUED) 3. How to set the ON time (Example) To start operation at 7:10 am. Operation 4. How to set DAILY ON/OFF REPEAT timer 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.
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.
ADJUSTING THE AIRFLOW DIRECTION 1. Horizontal CAUTION 2. Vertical The horizontal airflow can be adjusted by moving the vertical vanes with your hands to the left or right. When the humidity is high, the vertical vanes should be in the front position during the cooling or dehumidifying operation. If the vertical vanes are positioned all of the way to the right or left, condensation may begin to form around the air vent and drip down.
OPERATION WITHOUT THE REMOTE CONTROLLER INDOOR UNIT 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. Cooling operation Stop OPERATION button NOTE 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 1.
CARE AND CLEANING (CONTINUED) Filter How to remove the filter The filter behind the air intake grille should be checked and cleaned at least once every two weeks. 1. Grasp both ends of the air intake grille, and remove it by opening towards the front and pulling towards you. Air intake grille 2. Remove the filter attached to the rear of the air intake grille. Cleaning How to replace the filter filter Use a vacuum cleaner to remove light dust.
CARE AND CLEANING (CONTINUED) Cleaning the main unit and Remote Controller • • • Removing and remounting the air intake grille CAUTION Washing the grille with water 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. The air intake grille can be removed in order to wash it with water. Refer to “How to remove the filter” and “How to replace the filter” on page 22.
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. Trouble Air conditioner does not run at all. Possible Cause Remedy 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.
SPECIFICATIONS Indoor Unit CS-MKS9NKU CS-MKS12NKU Power Source Single-phase, 208-230 V, 60 Hz 2.20 2.65 3.50 kW Cooling Capacity 7,500 9,000 11,900 BTU/h kW Heating Capacity BTU/h 33/30/27 34/31/28 36/33/29 Operation Cooling Operation (H/M/L) dB(A) Sound Heating Operation (H/M/L) dB(A) Unit Dimensions (H×W×D) 11-7/32×32-15/32×7-7/16 11-7/32×32-15/32×7-7/16 11-7/32×32-15/32×7-7/16 inch(mm) (Indoor unit : Include panel) (285×825×189) (285×825×189) (285×825×189) lbs.(kg) Net Weight 19.8(9.0) 19.8(9.0) 19.8(9.
APPENDIX B Operating Instructions CS-MKS18NKU CS-MKS24NKU (852-6-4181-215-00-1) A-2
Operating Instructions Split System Air Conditioner Model No. Indoor Units Outdoor Units CS-MKS18NKU CS-MKS24NKU CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU This air conditioner uses the refrigerant R410A. Before operating the unit, read these operating instructions thoroughly and keep them for future reference.
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.
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: Do not install this air conditioner where there are fumes or flammable gases, or in an extremely humid space such as a greenhouse.
• • • • • • CAUTION • • • • • • • • NOTICE 4 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.
NAMES OF PARTS Air Intakes INDOOR UNIT Air Outlet Remote Controller Drain Hose Refrigerant Tubes OUTDOOR UNIT Air Outlet NOTE 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 INDOOR UNIT IMPORTANT Avoid using radio equipment such as mobile phone near (within 4 ft. (1.2m)) the remote control receiver. Some radio equipment may cause malfunction of the unit. QUIET OPERATION button If the trouble happens, disconnect power and restart the air conditioner after a few minutes.
REMOTE CONTROLLER (DISPLAY) Displayed when transmitting data Displayed when indoor unit sensor is in use Displayed when setting temperature Displayed when temperature is shown Displayed when setting timer Displayed when the time display is set to 12-hour time. Symbols (1) Operation mode MILD DRY .............................. COOL ..................................... FAN ........................................ (2) Fan speed (4) Timer 24-hour clock with ON/OFF program Timer........................
REMOTE CONTROLLER Sensor Transmitter (Cover closed) Display ON/OFF operation button QUIET button 1 HR. TIMER button Temperature setting buttons (TEMP.
REMOTE CONTROLLER (CONTINUED) Temperature setting buttons (TEMP.) MODE selector button (DRY) (COOL) (FAN) FAN SPEED selector button 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. Use this button to select DRY, COOL or FAN mode. : The air conditioner reduces the humidity in the room. : The air conditioner makes the room cooler.
REMOTE CONTROLLER (CONTINUED) Temperature Display Selector button This switches the temperature display between °C and °F. Time Display Selector button This switches the time display between 24-hour time and 12-hour time. ACL button (ALL CLEAR) ADDRESS switch Puts the remote controller into pre-operation status. Always press this button after replacing the batteries.
USING THE REMOTE CONTROLLER (CONTINUED) 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. Air Conditioner (Indoor unit) Receiver (Transmitter head) Remote Controller Remote Controller Installation Position The remote controller may be operated either from a non-fixed position or from a wall-mounted position.
OPERATION WITH THE REMOTE CONTROLLER 1. Operation STEP 2 STEP 3 STEP 1 STEP 4 STEP 5 NOTE 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 1 Press the MODE selector button and select the desired mode. For dehumidifying operation o For cooling operation o For fan only operation o STEP 2 To start the air conditioner, press the ON/OFF operation button. STEP 3 Press the TEMP.
OPERATION WITH THE REMOTE CONTROLLER (CONTINUED) NOTE • 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.
OPERATION WITH THE REMOTE CONTROLLER (CONTINUED) 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. NOTE Pressing the MODE selector button cancels Night Setback mode.
OPERATION WITH THE REMOTE CONTROLLER (CONTINUED) 5. QUIET Mode QUIET Mode is used to reduce the fan sound of the indoor unit. Press the QUIET button. The mark appears in the display. To cancel, press QUIET button again. • • In QUIET Mode, the fan rotates at a slower speed than the fan speed setting. If the unit is already operating with a very low airflow, the fan sound may not change even if the QUIET button is pressed. 6.
SPECIAL REMARKS ‘‘DRY’’ ( ) Operation How it works? • • • Cooling ( ) Operation Power failure during operation 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.
SETTING THE TIMER NOTE 1. How to set the present time 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 (Example) To set to 10:30 pm. Operation 2. How to set the OFF time Indication 1. Press the CLOCK button once if the time indicator is not flashing. The time indication alone flashes. 2.
SETTING THE TIMER (CONTINUED) 3. How to set the ON time (Example) To start operation at 7:10 am. Operation 4. How to set DAILY ON/OFF REPEAT timer 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.
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.
ADJUSTING THE AIRFLOW DIRECTION 1. Horizontal CAUTION 2. Vertical The horizontal airflow can be adjusted by moving the vertical vanes with your hands to the left or right. When the humidity is high, the vertical vanes should be in the front position during the cooling or dehumidifying operation. If the vertical vanes are positioned all of the way to the right or left, condensation may begin to form around the air vent and drip down.
OPERATION WITHOUT THE REMOTE CONTROLLER INDOOR UNIT 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. Cooling operation Stop OPERATION button NOTE 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 1.
CARE AND CLEANING (CONTINUED) Filter How to remove the filter The filter behind the air intake grille should be checked and cleaned at least once every two weeks. 1. Grasp both ends of the air intake grille, and remove it by opening towards the front and pulling towards you. Air intake grille 2. Remove the filter attached to the rear of the air intake grille. Cleaning How to replace the filter filter Use a vacuum cleaner to remove light dust.
CARE AND CLEANING (CONTINUED) Cleaning the main unit and Remote Controller • • • Removing and remounting the air intake grille CAUTION Washing the grille with water 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. The air intake grille can be removed in order to wash it with water. Refer to “How to remove the filter” and “How to replace the filter” on page 22.
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. Trouble Air conditioner does not run at all. Possible Cause Remedy 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.
SPECIFICATIONS Model No. Power Source Cooling Capacity Heating Capacity kW BTU/h kW BTU/h dB(A) dB(A) Operation Cooling Operation (H/M/L) Sound Heating Operation (H/M/L) Unit Dimensions (H×W×D) inch(mm) (Indoor unit : Include panel) lbs.(kg) Net Weight Model No. Power Source Cooling Capacity Heating Capacity Operation Cooling Operation (Hi) Sound Heating Operation (Hi) Unit Dimensions (H×W×D) Net Weight Indoor Unit CS-MKS18NKU CS-MKS24NKU Single-phase, 208-230 V, 60 Hz 5.15 7.
