Panasonic CS-MKS18NKU, CS-MKS24NKU, CS-MKS9NKU service manual Refrigerant gas leakage may cause fire

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CAUTION

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.

NOTICE

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.

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Contents TECHNICAL & SERVICE MANUAL INDOOR UNIT CS-MKS7NKU CS-MKS9NKU CS-MKS12NKU CS-MKS18NKUCS-MKS24NKU DC INVERTER MULTI-SYSTEM AIR CONDITIONERSAFETY PRECAUTIONS If refrigerant gas leaks during the work, ventilate the room 4. REFRIGERANT FLOW DIAGRAM Table of Contents2. SPECIFICATIONS 8. TROUBLESHOOTING BEFORE CALLING FOR SERVICEAPPLICABLE MULTI-OUTDOOR UNITS Indoor Air Intake Temp 1. OPERATING RANGETemperature Outdoor Air Intake TempFeatures SPECIFICATIONSUnit Specifications Dimensions & WeightType FeaturesDimensions & Weight Voltage RatingType FeaturesDimensions & Weight Voltage RatingType FeaturesDimensions & Weight Voltage RatingType FeaturesDimensions & Weight Voltage RatingType FeaturesDimensions & Weight Voltage RatingType FeaturesDimensions & Weight Voltage RatingType FeaturesDimensions & Weight Voltage RatingType FeaturesDimensions & Weight Voltage RatingType Control PCB 2-2. Major Component Specifications2-2-1. Indoor Unit Fan MotorIndoor Unit CS-MKS9NKU Indoor Unit CS-MKS12NKU Indoor Unit CS-MKS18NKU Indoor Unit CS-MKS24NKU Temperature F C 2-3. Other Component SpecificationsResistance k ohm 3. DIMENSIONAL DATA CS-MKS9NKU CS-MKS12NKUCS-MKS24NKU CS-MKS18NKU4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram5-1. Air Throw Distance Charts 5. PERFORMANCE DATACS-MKS9NKU Room air temp. 80F 26.7C Cooling Cooling Cooling ASSY 6-1. Electric Wiring Diagrams6. ELECTRICAL DATA LAMPEmergency operation 7. FUNCTIONS7-1. Operation Functions SENSOR DRYNIGHT SETBACK HIGH POWERTimer backup Lamp colors7-2. Protective Functions Freeze prevention8-2. Method of Self-Diagnostics 8. TROUBLESHOOTING BEFORE CALLING FOR SERVICE8-1. Precautions before Performing Inspection or Repair PROCEDUREDIAGNOSIS CONTENTS INDOOR UNIT 1 OPERATION lamp 2 TIMER lamp 3 QUIET lampOPERATION button REMOTE CONTROL receiver INDICATION ON INDOOR UNITCheck the power voltage Blown 2 If the self-diagnostics function fails to operateNo indicators illuminate and the indoor fan does not rotate Check the indoor unit Is the fuse blown?8-3. Checking the Indoor and Outdoor Units T-RUN Test run compressor and fan motor turn ON3 How to Identify a Serial Communication Error Timer3-2 Condition E12 8-4. Trouble Diagnosis of Fan Motor 8-4-1. Indoor Fan MotorTrouble 8-5. Noise Malfunction and Electromagnetic InterferenceLocations most susceptible to noise CorrectionPage APPENDIX A Operating Instructions CS-MKS7NKU CS-MKS9NKU CS-MKS12NKUCU-3KS19NBU CU-4KS24NBU CU-4KS31NBU Operating Instructions Split System Air ConditionerCS-MKS7NKU CS-MKS9NKU CS-MKS12NKU Model No Indoor UnitsSAFETY PRECAUTIONS FEATURESCONTENTS PRODUCT INFORMATIONELECTRICAL REQUIREMENTS INSTALLATION LOCATIONSAFETY INSTRUCTIONS Refrigerant gas leakage may cause fire Remote Controller NAMES OF PARTSAir Intakes INDOOR UNIT Air Outlet Remote Controller Drain Hose Refrigerant Tubes OUTDOOR UNIT Air OutletUNIT DISPLAY AND OPERATION BUTTON REMOTE CONTROLLER DISPLAY REMOTE CONTROLLER REMOTE CONTROLLER CONTINUED SWEEPUSING THE REMOTE CONTROLLER USING THE REMOTE CONTROLLER CONTINUED OPERATION WITH THE REMOTE CONTROLLER 1. Operation3. Fan Only OPERATION WITH THE REMOTE CONTROLLER CONTINUED2. Adjusting the Fan Speed In Cooling and DRY Mode and 4. Night Setback ModeSetting Night Setback Mode is used for saving energy6. HIGH POWER Mode 5. QUIET Mode‘‘DRY’’ Operation Remote ControllerSPECIAL REMARKS Cooling OperationSETTING THE TIMER 1. How to set the present timeSETTING THE TIMER CONTINUED REPEAT timerSetting procedure USING THE 1-HOUR OFF TIMERTIPS FOR ENERGY SAVING Cancellation procedureADJUSTING THE AIRFLOW DIRECTION OPERATION WITHOUT THE REMOTE CONTROLLER CARE AND CLEANINGfilter CARE AND CLEANING CONTINUEDHow to remove the filter 1. Grasp both ends of the air Groove Pin Air intake grilleWashing the grille with water WIRED REMOTE CONTROLLERWhen using a footstool or the like, be careful not to let it tip over Trouble TROUBLESHOOTING BEFORE CALLING FOR SERVICEOPERATING RANGE Possible CauseIndoor Unit SPECIFICATIONSModel No Outdoor UnitAPPENDIX B Operating Instructions CS-MKS18NKU CS-MKS24NKUModel No CS-MKS18NKUCS-MKS24NKU Indoor UnitsSAFETY PRECAUTIONS FEATURESCONTENTS Simple One-touch Remote ControllerELECTRICAL REQUIREMENTS INSTALLATION LOCATIONSAFETY INSTRUCTIONS Refrigerant gas leakage may cause fire NAMES OF PARTS Air Intakes INDOOR UNIT Air Outlet Remote Controller Drain HoseRemote Controller Refrigerant Tubes OUTDOOR UNIT Air OutletUNIT DISPLAY AND OPERATION BUTTON REMOTE CONTROLLER DISPLAY REMOTE CONTROLLER REMOTE CONTROLLER CONTINUED USING THE REMOTE CONTROLLER REMOTE CONTROLLER CONTINUEDUSING THE REMOTE CONTROLLER CONTINUED OPERATION WITH THE REMOTE CONTROLLER 1. Operation3. Fan Only OPERATION WITH THE REMOTE CONTROLLER CONTINUED2. Adjusting the Fan Speed OPERATION WITH THE REMOTE CONTROLLER CONTINUED 4. Night Setback Mode5. QUIET Mode OPERATION WITH THE REMOTE CONTROLLER CONTINUED6. HIGH POWER Mode ‘‘DRY’’ Operation Remote ControllerSPECIAL REMARKS Cooling OperationSETTING THE TIMER 1. How to set the present timeSETTING THE TIMER CONTINUED REPEAT timerCancellation procedure USING THE 1-HOUR OFF TIMERSetting procedure 2. Operation together with the DAILY ON/OFF REPEAT TimerADJUSTING THE AIRFLOW DIRECTION OPERATION WITHOUT THE REMOTE CONTROLLER Groove Pin Air intake grille Air intake grille WIRED REMOTE CONTROLLER CARE AND CLEANING CONTINUEDTrouble TROUBLESHOOTING BEFORE CALLING FOR SERVICEOPERATING RANGE Possible CauseIndoor Unit APPENDIX C INSTALLATION INSTRUCTIONS CS-MKS7NKU CS-MKS9NKU CS-MKS12NKU CS-MKS18NKU CS-MKS24NKUNOTE External diameter of service port R410A 5/16 INSTALLATION INSTRUCTIONS Split System Air ConditionerContents For Indoor UnitWhen Installing… SPECIAL PRECAUTIONSWhen Transporting In Case of Improper Installation‡ &KHFNFDUHIXOO\IRUOHDNVEHIRUHVWDUWLQJWKHWHVWUXQ When ServicingOthers 1-2. Accessories Supplied with Unit Table 1. General1-1. Tools Required for Installation not supplied obtaining wire. Also, check2-1. Indoor Unit 2. Installation Site Selection1-5. Additional Materials Required for Installation AVOID2-2. Embedding the Tubing and Wiring 3-1. Remove the Rear Panel from the Unit 3. How to Install the Indoor Unittrical wiring or conduits are 3-2. Make a Holeb If Block, Brick, Concrete or Similar Type Wall 3-3. Install the Rear Panel on the Walla If Wooden Wall Fig. 13a3-4. Removing and Installing the Grille 3-4-1. Indoor unit types Fig. 16a-1 Fig. 16b-1 3-4-2. Indoor unit types CS-MKS18NKU, CS-MKS24NKUFig. 19b-1 Fig. 17a-1 Fig. 17b-13-6. Wiring Instructions General precautions on wiring 3-5. Shape the Indoor Side TubingFig. 26b 3-7. Wiring Instructions for Inter-unit ConnectionsFig. 26a b For Outdoor Unit  For solid core wiring or F-cable WARNING Loose wiring may cause the terminal to overheat or resultHow to connect wiring to the terminal a For Indoor Unit  For stranded wiringFig. 37a 3-8. Mounting Right-side tubing Fig. 37bDrain hose Switching drain hose and drain cap Left-side tubing Drain capTo unmount indoor unit Do not supply power to thetubing and wiring to the out 3-9. Drain HoseFig. 59c 4. How to Test Run the Air ConditionerFig. 59a Fig. 59b 5. Remote Controller Installation Position 6. Address Switch 6-1. Address Setting of the Remote Controller7. Connecting a Home Automation Device 8. Installation Check SheetPage DC1111-0
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CS-MKS18NKU, CS-MKS9NKU, CS-MKS24NKU specifications

The Panasonic CS-MKS7NKU, CS-MKS9NKU, and CS-MKS12NKU are part of Panasonic's reputable air conditioning lineup, designed to provide efficient and comfortable cooling and heating solutions for various spaces. These models are ideal for residential and light commercial use, showcasing a blend of innovative technology and user-friendly features.

One of the main characteristics of these units is their inverter technology, which optimizes energy consumption by adjusting the compressor speed based on the cooling or heating demand. This results in lower energy bills and a more sustainable approach to climate control, aligning with the growing demand for eco-friendly solutions. The inverter operation not only enhances energy efficiency but also contributes to quieter operation compared to traditional systems.

Another outstanding feature is the advanced air filtration system integrated into all three models. The system includes a nanoe™ X technology which utilizes nano-sized charged water particles to effectively inhibit the growth of airborne bacteria and viruses, thus improving indoor air quality. Additionally, the filters are designed for easy cleaning, providing convenience for users and reducing maintenance efforts.

The CS-MKS series also boasts a sleek and modern design that seamlessly fits into various interior decors while being compact enough for easy installation. They are engineered for whisper-quiet operation, making them suitable for bedrooms, offices, and other quiet spaces, ensuring comfort without the distraction of noise.

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In terms of energy efficiency, all models are rated highly, ensuring that they not only provide comfort but also minimize environmental impact. Their eco-friendly refrigerant further supports sustainable operation, making them a top choice for environmentally conscious consumers.

In summary, the Panasonic CS-MKS7NKU, CS-MKS9NKU, and CS-MKS12NKU are highly efficient air conditioning units that combine inverter technology, advanced air purification, modern design, and smart connectivity. These features make them ideal candidates for anyone looking for reliable, eco-friendly, and user-centric climate control solutions.