Manuals / Panasonic / Household Appliance / Air Conditioner

Panasonic CU-KS12NK1A service manual CS-KS12NB41Body & CZ-18BT1UPanel, CU-KS18NKU CU-KS18NKUA

Models: CS-KS18B4UW & CZ-18BT1U CS-KS12NB41 & CZ-18BT1U CU-KS12NK1A CU-KS18NKUA

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TECHNICAL & SERVICE MANUAL

CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA

DC INVERTER SPLIT SYSTEM AIR CONDITIONER

Indoor Model No.	Product Code No.
Body (Panel)	Body (Panel)

CS-KS12NB41 (CZ-18BT1U)	1 852 361 04 (1 852 361 15)

CS-KS18NB4UW (CZ-18BT1U)	1 852 361 06 (1 852 361 15)

Outdoor Model No.	Product Code No.

CU-KS18NKU	1 852 361 18
CU-KS12NK1A	1 852 361 16
CU-KS18NKUA	1 852 361 19

Indoor Unit

Outdoor Unit

Body

Panel

CS-KS12NB41 (Body) & CZ-18BT1U (Panel)
CS-KS18NB4UW (Body) & CZ-18BT1U (Panel)	CU-KS12NK1A

Remote Controller

Wired Remote Controller

(Option)

CU-KS18NKU

CU-KS18NKUA

REFERENCE NO. SM700879

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Panasonic CU-KS12NK1A service manual CS-KS12NB41Body & CZ-18BT1UPanel, CS-KS18NB4UWBody & CZ-18BT1UPanel, Indoor Unit

Contents

CS-KS18NB4UWBody & CZ-18BT1UPanel CS-KS12NB41Body & CZ-18BT1UPanelCU-KS12NK1A CU-KS18NKU CU-KS18NKUASAFETY PRECAUTIONS which may cause a unit breakdown SPECIFICATIONS Table of ContentsREFRIGERANT FLOW DIAGRAM MAINTENANCEINSTALLATION INSTRUCTIONS SPECIAL PRECAUTIONS WHEN SERVICING UNIT10. CHECKING ELECTRICAL COMPONENTS 11. REFRIGERANT R410ATemperature 1. OPERATING RANGETemperature Models : CS-KS18NB4UW& CZ-18BT1U+ CU-KS18NKUUnit Specifications 2. SPECIFICATIONS2-1-1 CS-KS18NB4UW& CZ-18BT1UDimensions & Weight Outdoor Unit Dimensions & Weight Indoor UnitCS-KS18NB4UW& CZ-18BT1U CU-KS18NKUCS-KS18NB4UW& CZ-18BT1U 2-1-2. Indoor UnitOutdoor Unit CU-KS18NKUDimensions & Weight Outdoor Unit Dimensions & Weight Indoor UnitCS-KS18NB4UW& CZ-18BT1U CU-KS18NKUCS-KS12NB41& CZ-18BT1U 2-1-3. Indoor UnitOutdoor Unit CU-KS12NK1A Voltage RatingDimensions & Weight Outdoor Unit Dimensions & Weight Indoor UnitCS-KS12NB41& CZ-18BT1U CS-KS18NB4UW& CZ-18BT1U 2-1-4. Indoor UnitOutdoor Unit CU-KS18NKUA < 230V >Dimensions & Weight Outdoor Unit Dimensions & Weight Indoor UnitCS-KS18NB4UW& CZ-18BT1U CS-KS18NB4UW& CZ-18BT1U 2-1-5. Indoor UnitOutdoor Unit CU-KS18NKUA < 208V >Dimensions & Weight Outdoor Unit Dimensions & Weight Indoor UnitIndoor Unit CS-KS18NB4UW& CZ-18BT1U2-2-1.Indoor Unit 2-2.Major Component SpecificationsControl PCB Fan MotorFan Motor Control PCBDrain Pump Heat Exchanger CoilControl PCB 2-2-2.Outdoor UnitCompressor Fan MotorCompressor Control PCBFan Motor Heat Exchanger CoilCompressor Control PCBFan Motor Heat Exchanger CoilTemperature F C 2-3.Other Component SpecificationsTemperature F C Temperature F CIndoor Unit CS-KS12NB41& CZ-18BT1U 3. DIMENSIONAL DATACS-KS18NB4UW& CZ-18BT1U Unit : inch mm 852-0-0010-12600-0 Unit : inch mm 852-0-0010-13300-0 CU-KS18NKUA4-1.Refrigerant Flow Diagram 4. REFRIGERANT FLOW DIAGRAMIndoor Unit CS-KS12NB41& CZ-18BT1U Outdoor Unit CU-KS12NK1AIndoor unit CU-KS18NKUAOutdoor unit 5. PERFORMANCE DATA 5-1.Temperature ChartsIndoor Unit CS-KS12NB41& CZ-18BT1U Outdoor Unit CU-KS12NK1AOutdoor Unit CU-KS18NKUor CU-KS18NKUA Indoor Unit CS-KS18NB4UW& CZ-18BT1UCS-KS12NB41& CZ-18BT1U 5-2.Cooling CapacityCU-KS12NK1A Indoor Unit Power Supply : 230V Single Phase 60HzCS-KS18NB4UW& CZ-18BT1U Outdoor UnitCS-KS12NB41& CZ-18BT1U 5-3.Cooling Capacity Low AmbientCU-KS12NK1A CU-KS18NKUA CS-KS18NB4UW& CZ-18BT1USHC : Sensible Heat Capacity BTU/h 6. ELECTRICAL DATA 6-1.Electrical CharacteristicsIndoor Unit CS-KS12NB41& CZ-18BT1U CoolingCU-KS18NKU CS-KS18NB4UW& CZ-18BT1UCooling CoolingIndoor Unit 6-2.Electric Wiring DiagramsCS-KS18NB4UW CS-KS12NB41&8FA2-5251-12300-2 Outdoor Unit CU-KS12NK1AOutdoor Unit CU-KS18NKU CU-KS18NKUA 7-1.Address Setting of the Remote Controller 7. MAINTENANCEFig. Fig.How to Connect How to DisconnectPull the cover upward 7-3-1.Remove the air intake grill 7-3.Disassembly ProcedureWARNING attempting to disassemble the unit Fig.1Fig.6 7-3-3.Remove the ceiling panelFig.7 Fig.87-3-5.Remove the power box and control box 7-3-4.Remove the indoor air temperature sensorFig.10 Fig.11Fig.14 Fig.13Fig.15 44 Screw Ground cableFig.16 7-3-6.Remove the main body lower sectionFig.17 Fig.187-3-7.Remove the heat exchanger sensor 7-3-8.Remove the drain pump and float switchFig.19 Fig.207-3-10.Remove the heat exchanger 7-3-9.Remove the turbo fan and fan motorFig.22 Fig.238-1.Operation Functions 8. FUNCTIONSEmergency operation SENSOR DRYTimer backup HIGH POWERNIGHT SETBACK Lamp colors8-2.Protective Functions Compressor discharge temperature controlFreeze prevention CT Peak current cut-offcontrol9-2.Method of Self-Diagnostics 9. TROUBLESHOOTING BEFORE CALLING FOR SERVICEPROCEDURE TIMER lamp 1 Self-diagnosticsLampsHIGH POWER lamp REMOTE CONTROL receiver2If the self-diagnosticsfunction fails to operate 9-3.Checking the Indoor and Outdoor UnitsUsing the TEST/T-RUNterminals Check the indoor unit Is the fuse blown?3-1Condition: E01 < Before the Operation >Continued from the previous page A 3-2Condition: E12 9-4-1.Indoor Fan Motor 9-4.Trouble Diagnosis of Fan MotorDiagnostic procedure Diagnostic resultsDiagnostic procedure 9-4-2.Outdoor Fan MotorDiagnostic results Remedy for symptom 3 to2 Electromagnetic interference 1 Noise malfunctionLocations most susceptible to noise Trouble10. CHECKING ELECTRICAL COMPONENTS 10-1-1.Power Supply Cord10-1.Measurement of Insulation Resistance 10-1-2.Indoor UnitFig. 10-2.Checking Continuity of Fuse on PCB AssyFig. 11-1.Characteristics of New Refrigerant R410A SPECIAL PRECAUTIONS WHEN SERVICING UNIT11-1-1.What is New Refrigerant R410A? 11-1-3.CharacteristicsTubing precautions 11-2.Checklist before ServicingSize of flare No addition of compressor oil for R410A11-3.Tools Specifically for R410A 11-4.Tubing Installation ProceduresFor servicing, use the following tools for R410A Tool Distinction11-5.In Case of Compressor Malfunction 11-5-1.Procedure for Replacing Compressor1 Recovering refrigerant 2 Replacing Compressor5 Recharging Configuration and characteristics of cylindersNever charge a large amount Example2 Recovering refrigerant 11-6.In Case Refrigerant is Leaking1 Detecting Leaks 3 Welding leaking points11-7.Charging Additional Refrigerant 11-7-1.When Tubes are Extended11-8. Retro-FittingExisting Systems 11-8-1.Use of Existing UnitsPage Operating Instructions APPENDIX ACS-KS12NB41 CU-KS12NK1A CS-KS18NB4UW CU-KS18NKU Split System Air ConditionerCU-KS18NKUA CU-3KS19NBU CU-4KS24NBU CU-4KS31NBUCONTENTS FEATURESSAFETY PRECAUTIONS PRODUCT INFORMATIONSAFETY INSTRUCTIONS INSTALLATION LOCATIONELECTRICAL REQUIREMENTS AvoidUNIT DISPLAY AND OPERATION BUTTON NAMES OF PARTSAir Intake Air OutletSymbols REMOTE CONTROLLER DISPLAYHIGH POWER button REMOTE CONTROLLERON TIME/OFF TIME setting buttons Advance button CANCEL button SENSOR buttonTemperature setting buttons TEMP 1 HR. TIMER button 1-HOUROFF TIMERSensor ON/OFF operation buttonHOW TO INSTALL BATTERIES USING THE REMOTE CONTROLLERHOW TO USE THE REMOTE CONTROLLER REMOTE CONTROLLER INSTALLATION POSITION2. Adjusting the Fan Speed OPERATION WITH THE REMOTE CONTROLLER1. Operation 3. Fan Only5. HIGH POWER Mode SETTING THE TIMERPower failure during operation Remote Controller2. How to set the OFF time 1. How to set the present time3. How to set the ON time 4. How to set daily ON/OFF repeat timerADJUSTING THE AIRFLOW DIRECTION USING THE 1-HOUROFF TIMER1. 1-HourOFF Timer TIPS FOR ENERGY SAVINGOPERATION WITHOUT THE REMOTE CONTROLLER CARE AND CLEANINGWhen the air conditioner is not running Cleaning the flapsHow to remove the air intake grille How to remove the filterSafety cord Air filter Air intake grille hinge Safety cordWIRED REMOTE CONTROLLER TROUBLESHOOTINGBEFORE CALLING FOR SERVICE OPERATING RANGEModel No SPECIFICATIONSOutdoor Unit Indoor Unit•For Multiple use •For Multiple useModel No Indoor UnitAPPENDIX B INSTALLATION INSTRUCTIONS3. HOW TO INSTALL THE INDOOR UNIT Contents4. HOW TO INSTALL THE OUTDOOR UNIT 7.REMOTE CONTROLLER INSTALLATIONIn Case of Improper Installation SPECIAL PRECAUTIONSWhen Transporting When Installing…Others When Servicingfins of the outdoor unit. You may get injured accidentally1-1.Tools Required for Installation not supplied 1. General1-2.Accessories Supplied with Unit Table 1-3.Optional Copper Tubing Kit2-1.Indoor Unit 2. Installation Site SelectionAVOID Fig.Fig. CU-KS12NK1A 2-2.Outdoor Unit AVOIDFig. 4a CU-KS18NKU, CU-KS18NKUABack FrontFig. 5c Air Discharge Baffle Air Intake Baffle1Recommended dimensions of the baffle plates CU-KS12NK1AAir Intake Baffle 1Recommended dimensions of the baffle platesAir Discharge Baffle CU-KS18NKUA1. Air Intake Baffle 3 Installation procedure CU-KS12NK1A2.Air Discharge Baffle Fig. 5hCU-KS18NKUA 4 Precautions for installation1. Air Intake Baffle 2. Air Discharge Baffle3-1.Preparation for Suspending 3. How to Install the Indoor Unit3-2.Suspending the Indoor Unit 3-3.Placing the Unit Inside the CeilingDo not use natural drainage 3-4.Installing the Drain PipingFig. Fig.3-6-1.Before Installing the Ceiling Panel 3-6.How to Install the Ceiling Panel3-5.Checking the Drainage Fig. 6-10aFig. 3-6-2.Installing the Ceiling PanelFig. Fig.Fig. 3-6-3.Wiring the Ceiling Panel and the IndicatorFig. A. Attaching the corner cover3-6-7.Adjusting the Auto Flap 3-6-5.Checking After Installation3-7.Wiring Instructions General precautions on wiringWIRING SYSTEM DIAGRAM CU-KS12NK1A Each wire must be firmly connectedTable Otherwise, electrical shock may occurHow to connect wiring to the terminal 3-9.Wiring Instructions for Inter-unitConnectionsFor solid core wiring or F-cable Fig.For stranded wiring 4. How to Install the Outdoor Unit4-1.Wiring Instructions for the Outdoor Unit Fig.5-2.Flaring Procedure with a Flare Tool 5. Refrigerant Tubing5-3.Caution before Connecting Tubes Tightly 5-1.Use of the Flaring Method5-5.Insulation of Refrigerant Tubing TableFig. Fig.5-7.Finishing the Installation 6. Air Purging5-6.Taping the Tubes Air Purging with a Vacuum Pump for Test RunBe sure to completely insert the hex Tablewrench before attempting to turn the valve Fig.Fig. Fig. How to Test Run the Air ConditionerFig. Pump Down Basic Functions of the Service Valvesing the service valve Pump Down Procedure7. Remote Controller Installation Position Service Valve ConnectionsRemote control holder Table8-1.Address Setting of the Remote Controller 8. Address SwitchFig. Fig.Page CZ-RD515U APPENDIX COperating Instructions Model No. CZ-RD515U Operating Instructions Wired Remote ControllerCONTENTS FEATURESSAFETY PRECAUTIONS PRODUCT INFORMATIONSAFETY INSTRUCTIONS INSTALLATION LOCATIONELECTRICAL REQUIREMENTS AvoidTemperature setting buttons TEMP REMOTE CONTROLLERTimer and Present Time setting buttons DisplayTIMER SELECT button 1 HR. TIMER button 1-HOUROFF TIMERAUTO HEATSymbols REMOTE CONTROLLER DISPLAY1Operation mode AUTO only for COOL/DRY/HEAT Model only for COOL/DRY/HEAT Model 1.Automatic Operation2. Manual Operation OPERATION WITH THE REMOTE CONTROLLERRemote Controller Display 3. Adjusting the Fan Speed4. Fan Only 5. Night Setback ModeSETTING THE TIMER 5. Backup function1. How to set the present time 2. How to set the OFF timeADJUSTING THE AIRFLOW DIRECTION USING THE 1-HOUROFF TIMER1. 1-HourOFF Timer Setting procedurePage INSTALLATION INSTRUCTIONS APPENDIX DCZ-RD515U Parts supplied with the remote controller INSTALLATION INSTRUCTIONS Wired Remote ControllerRemote controller installation guidelines How to install the remote controllerB. Installing directly onto the wall A. Installing with in-walljunction boxFig. 2-a Fig. 2-bFig. How to wire the remote controllerFig. 8-a Fig.Fig. How to Test Run the Air ConditionerFig. Fig. WI1011-0 Printed in ChinaPage DC1111-0

TECHNICAL & SERVICE MANUAL

DC INVERTER SPLIT SYSTEM AIR CONDITIONER

Indoor Model No.

Product Code No.

Body (Panel)

CS-KS12NB41 (CZ-18BT1U)

Outdoor Model No.

CU-KS18NKU

CU-KS12NK1A

CU-KS18NKUA

Indoor Unit

Outdoor Unit

CS-KS12NB41 (Body) & CZ-18BT1U (Panel)

CS-KS18NB4UW (Body) & CZ-18BT1U (Panel)

CU-KS12NK1A

CU-KS18NKU