Panasonic CS-KS18NKU, CU-KS18NKU instruction

TECHNICAL & SERVICE MANUAL

CS-KS18NKU + CU-KS18NKU + CU-KS18NKUA

CS-KS24NKU + CU-KS24NKU + CU-KS24NKUA

DC INVERTER SPLIT SYSTEM AIR CONDITIONER

Indoor Model No.	Product Code No.

CS-KS18NKU	1 852 360 90

CS-KS24NKU	1 852 360 91

Outdoor Model No.	Product Code No.

CU-KS18NKU	1 852 361 18

CU-KS18NKUA	1 852 361 19

CU-KS24NKU	1 852 361 21
CU-KS24NKUA	1 852 361 22

Indoor Unit

Outdoor Unit

CS-KS18NKU

CS-KS24NKU

CU-KS18NKU

CU-KS18NKUA

IMPORTANT

These air conditioners employ new refrigerant R410A.

Pay special attention when servicing the unit.

CU-KS24NKU

CU-KS24NKUA

REFERENCE NO. SM700872

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Panasonic CS-KS18NKU, CU-KS18NKU service manual DC Inverter Split System AIR Conditioner

Contents

DC Inverter Split System AIR Conditioner Safety Precautions Prohibit Table of Contents Appendix a Models CS-KS18NKU + CU-KS18NKU Operating RangeCS-KS24NKU + CU-KS24NKU Models CS-KS18NKU + CU-KS18NKUA Unit Specifications SpecificationsCS-KS18NKU CU-KS18NKU 208V CU-KS24NKU CS-KS24NKU 12.1 CU-KS18NKUA 15 1.2 to Dimen Outdoor Unit CU-KS24NKUA 230V CU-KS24NKUA Indoor Unit Major Component SpecificationsIndoor Unit CS-KS18NKU CB-CS-KS24NKU Indoor Unit CS-KS24NKU Outdoor Unit CU-KS18NKU Outdoor Unit Outdoor Unit CU-KS24NKU Outdoor Unit CU-KS18NKUA Outdoor Unit CU-KS24NKUA CS-KS18NKU CS-KS24NKU Other Component SpecificationsCU-KS18NKU CU-KS24NKU CU-KS18NKUA CU-KS24NKUA Dimensional Data 23-15/165-11/32 852-0-0010-119-00-0 Refrigerant Flow Diagram Refrigerant Flow DiagramInsulation of Refrigerant Tubing CS-KS24NKU CU-KS18NKUA CU-KS24NKUA Performance Data Temperature Charts Indoor Unit CS-KS18NKU Outdoor Unit CU-KS18NKUA Indoor Unit CS-KS24NKU Outdoor Unit CU-KS24NKU Indoor Unit CS-KS24NKU Outdoor Unit CU-KS24NKUA Cooling Capacity Power Supply 230V Single Phase 60Hz Cooling CapacityOutdoor Unit CU-KS18NKU / CU-KS18NKUA Outdoor Unit CU-KS24NKU / CU-KS24NKUA SHC Cooling Capacity Low Ambient 15,690 20,420 Air Throw Distance Charts Cooling Electrical Data Electrical Characteristics CS-KS24NKU Indoor Unit CS-KS18NKU CS-KS24NKU Electric Wiring Diagrams8FA2-5251-11000-2 BLK Outdoor Unit CU-KS18NKU CU-KS18NKUA RED WHT 1P-CONNECTORWHT Address Setting of the Remote Control Unit Maintenance How to Connect How to Disconnect Operation Functions FunctionsEmergency operation PAM- control Lamp colors Timer backup Protective Functions Compressor discharge temperature controlFreeze prevention CT Peak current cut-off control Precautions before Performing Inspection or Repair Troubleshooting Before Calling for ServiceMethod of Self-Diagnostics Code Diagnosis Contents Self-diagnostics Lamps Replace the controller NormalReplace the circuit board or the fuse Checking the Indoor and Outdoor Units Using the TEST/T-RUN terminalsChecking the indoor unit Control Check items unit operation Before the Operation Serial Communication Error Identification ProcedureOff Blinking Illuminated Condition E01 From the previous page a Condition E12 Indoor Fan Motor Trouble Diagnosis of Fan Motor CU-KS24NKU / CU-KS24NKUA Outdoor Fan Motor Noise malfunction Noise Malfunction and Electromagnetic InterferenceElectromagnetic interference Checking Electrical Components Power Supply CordMeasurement of Insulation Resistance Measurement of Insulation Resistance for Electrical Parts Checking Continuity of Fuse on PCB Assy Characteristics of New Refrigerant R410A Refrigerant R410A Special Precautions When Servicing UnitWhat is New Refrigerant R410A? Characteristics Checklist before Servicing Tools Specifically for R410A Tubing Installation Procedures Case of Compressor Malfunction Procedure for Replacing Compressor Unit. This may cause Never charge a large amountDamage to the compressor Amount in the charging cylinder is less than 20% Welding leaking points Case Refrigerant is LeakingRecharging Charging Additional Refrigerant When Tubes are ExtendedRetro-Fitting Existing Systems Use of Existing Units Appendix a Operating Instructions Operating Instructions Split System Air Conditioner Contents FeaturesSafety Precautions Product Information Safety Instructions Installation LocationElectrical Requirements Page Indoor Unit Names of PartsOutdoor Unit Unit Display and Operation Button Green and FAN green modeQuiet lamp Remote Controller Display Hour OFF Timer Remote ControllerOn Time OFF Time DRY TempCool FAN How to Install Batteries Using the Remote ControllerACL button ALL Clear Use a thin object such as the tip of a pen to press Receiver which could block the signal To take out the remote controller, pull it forwardRear Side Hole Controller Step Operation with the Remote Controller Press the ON/OFF operation button Operation with the Remote Controller Night Setback Mode Quiet Mode Special Remarks Power failure during operationClicking sound is heard from the air conditioner Example To set to 1030 pm Setting the TimerOperation Indication To cancel a timer program Press the Cancel button How to set the on time Example To start operation at 710 am1030 pm 710 am 1100 am OFF Setting procedure Using the 1-HOUR OFF TimerCancellation procedure Operation together with the Daily ON/OFF Repeat Timer Cool Sweep DRY FAN Adjusting the Airflow Direction Care and Cleaning Operation Without the Remote ControllerWhen the air conditioner is not running Cyclically Cooling operation Stop Groove Pin Air intake grille How to remove the filter 1. Grasp both ends of the air Washing the grille with water Wired Remote Controller Operating Range Troubleshooting Before Calling for ServiceTrouble Possible Cause Remedy CU-KS18NKU, CU-KS18NKUA CS-KS18NKU Specifications 852-6-4190-576-00-0 Contents Installation Instructions Split System Air Conditioner Please Read Before Starting Accidentally Fins of the outdoor unit. You may get injured Accessories Supplied with Unit Table Tools Required for Installation not suppliedGeneral Optional Copper Tubing Kit Additional Materials Required for Installation Installation Site SelectionAvoid About Baffle Plate for the Outdoor Unit CU-KSxxNKUA models only Front Back Air Discharge Baffle Air Intake Baffle Precautions for installation Trical wiring or conduits are How to Install the Indoor UnitRemove the Rear Panel from the Unit Make a Hole If Wooden Wall Install the Rear Panel on the WallIf Block, Brick, Concrete or Similar Type Wall How to remove the grille Remove the Grille to Install the Indoor UnitHow to replace the grille Shape the Indoor Side Tubing Wiring Instructions General precautions on wiring Wiring System Diagram Recommended Wire Length and Diameter Wiring Instructions for Inter-unit Connections For Outdoor Unit For solid core wiring or F-cable How to connect wiring to the terminal For Indoor Unit For stranded wiring Right-side tubing Mounting Left-side tubing Switching drain hose and drain capDrain cap Tubing and wiring to the out Do not supply power toTo unmount indoor unit Unit or operate it until all First refer to . Installation Site Selection How to Install the Outdoor UnitWiring Instructions for the Outdoor Unit Refrigerant Tubing Flaring Procedure with a Flare ToolUse of the Flaring Method Finishing the Installation Connecting Tubing between Indoor and Outdoor UnitsInsulation of Refrigerant Tubing To prevent heat loss and wet floors due to dripping of con Air Purging with a Vacuum Pump for Test Run Air PurgingTem. The valve core is similar to Those used in automobile tiresPage How to Test Run the Air Conditioner Basic functions of the service valves are given in below Basic Functions of the Service ValvesWhen opening or closing the service valve stem External diameter of service port R410A 5/16 Remote Controller Installation Position Service Valve ConnectionsMounting on a Wall Address Setting of the Remote Controller Address SwitchPage DC1111-0