Manuals / Panasonic / Household Appliance / Air Conditioner

Panasonic CU-4KE31NBU, CU-4KE24NBU Applicable Indoor Units, Wall Mounted Type, Semi-ConcealedType

Models: CU-3KE19NBU CU-4KE24NBU CU-4KE31NBU

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APPLICABLE INDOOR UNITS

Wall Mounted Type

	Indoor Unit
Multi-Outdoor Unit		CS-MKE7NKU	CS-MKE9NKU	CS-MKE12NKU	CS-MKE18NKU	CS-MKE24NKU
Multi-Outdoor Unit

3-Room	CU-3KE19NBU	YES	YES	YES	YES	NO

4-Room	CU-4KE24NBU	YES	YES	YES	YES	YES

4-Room	CU-4KE31NBU	YES	YES	YES	YES	YES

Semi-Concealed Type

	Indoor Unit	CS-MKE9NB4U	CS-MKE12NB4U	CS-KE12NB4UW
		&	&	&
Multi-Outdoor Unit		CZ-18BT1U	CZ-18BT1U	CZ-18BT1U

3-Room	CU-3KE19NBU	YES	YES	YES

4-Room	CU-4KE24NBU	YES	YES	YES

4-Room	CU-4KE31NBU	YES	YES	YES

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Panasonic CU-4KE31NBU, CU-4KE24NBU, CU-3KE19NBU service manual Applicable Indoor Units, Wall Mounted Type, Semi-ConcealedType

Contents

TECHNICAL & SERVICE MANUAL OUTDOOR UNIT : CU-3KE19NBU CU-4KE24NBUCU-4KE31NBU Pay special attention when servicing the unitSAFETY PRECAUTIONS which may cause a unit breakdown REFRIGERANT FLOW DIAGRAM Table of ContentsSPECIFICATIONS TROUBLESHOOTING BEFORE CALLING FOR SERVICESPECIAL PRECAUTIONS WHEN SERVICING UNIT 9. REFRIGERANT R410AAPPENDIX A APPLICABLE INDOOR UNITS Wall Mounted TypeSemi-ConcealedType Indoor Air Intake Temp 1. OPERATING RANGETemperature Outdoor Air Intake TempType 2. SPECIFICATIONS2-1.Unit Specifications Number of Connectable Indoor UnitsNumber of Operatable Indoor Units TypeNumber of Connectable Indoor Units Voltage RatingNumber of Operatable Indoor Units TypeNumber of Connectable Indoor Units Voltage RatingNumber of Operatable Indoor Units TypeNumber of Connectable Indoor Units Voltage RatingNumber of Operatable Indoor Units TypeNumber of Connectable Indoor Units Voltage RatingNumber of Operatable Indoor Units TypeNumber of Connectable Indoor Units Voltage RatingNumber of Operatable Indoor Units TypeNumber of Connectable Indoor Units Voltage RatingNumber of Operatable Indoor Units TypeNumber of Connectable Indoor Units Voltage RatingNumber of Operatable Indoor Units TypeNumber of Connectable Indoor Units Voltage RatingControl PCB 2-2.Major Component Specifications2-2-1.Outdoor Unit CompressorFan Motor Control PCBCompressor Heat Exchanger CoilFan Motor Control PCBCompressor Heat Exchanger CoilTemperature F C 2-3.Other Component SpecificationsTemperature F C Resistance k ohm3. DIMENSIONAL DATA Unit: inchmm 852-0-0010-11200-0Unit inchmm Unit inchmm 4. REFRIGERANT FLOW DIAGRAM 4-1.Refrigerant Flow DiagramInsulation of Refrigerant Tubing Insulation of Refrigerant Tubing Indoor unitOutdoor unit Insulation of Refrigerant Tubing Indoor unitOutdoor unit 5-1.Temperature Charts 5-1-1.Temperature Charts CU-3KE19NBU5. PERFORMANCE DATA Indoor Unit CS-MKE9NKU× Heating Characteristics Cooling CharacteristicsIndoor Unit CS-MKE18NKU× Indoor Unit CS-MKE9NB4U× Outdoor Unit CU-3KE19NBU Heating CharacteristicsCooling Characteristics Indoor Unit CS-MKE12NB4U×Indoor Unit CS-KE12NB4UW× 5-1-2.Temperature Charts CU-4KE24NBU Indoor Unit CS-MKE7NKU×wideat Indoor Unit CS-MKE9NKU×wideat currentOutdoor Unit CU-4KE24NBU Heating CharacteristicsCooling Characteristics Indoor Unit CS-MKE12NKU×1 Low pressure performance chart Cooling CharacteristicsHeating Characteristics 1 High pressure performance chartIndoor Unit CS-MKE24NKU× Indoor Unit CS-MKE9NB4U× Outdoor Unit CU-4KE24NBU Heating CharacteristicsCooling Characteristics Indoor Unit CS-MKE12NB4U×1 Low pressure performance chart Cooling CharacteristicsHeating Characteristics 1 High pressure performance chart5-1-3.Temperature Charts CU-4KE31NBU Indoor Unit CS-MKE7NKU×Indoor Unit CS-MKE9NKU× Indoor Unit CS-MKE12NKU× Indoor Unit CS-MKE18NKU× Indoor Unit CS-MKE24NKU× 1 Low pressure performance chart Cooling CharacteristicsHeating Characteristics 1 High pressure performance chartIndoor Unit CS-MKE12NB4U× tempIndoor 70F Indoor Unit CS-KE12NB4UW× Outdoor Unit : CU-3KE19NBU 5-2.Cooling CapacityPower Supply : 230V Single Phase 60Hz Indoor Unit : CS-MKE9NKU×CU-3KE19NBU CS-MKE12NB4U×CU-4KE24NBU CS-MKE9NKU×CU-4KE24NBU CS-KE18NB4UW+ CS-MKE12NB4U+ CS-MKE12NB4UCU-4KE31NBU CS-MKE9NKU×CU-4KE31NBU CS-MKE9NB4U×Outdoor Unit : CU-3KE19NBU 5-3.Cooling Capacity Low AmbientPower Supply : 230V Single Phase 60Hz Indoor Unit CS-MKE9NKU×CU-3KE19NBU CS-MKE12NB4U×CU-4KE24NBU CS-MKE9NKU×CU-4KE24NBU CS-KE18NB4UW+ CS-MKE12NB4U+ CS-MKE12NB4UCU-4KE31NBU CS-MKE9NKU×CU-4KE31NBU CS-MKE9NB4U×Outdoor Unit : CU-3KE19NBU 5-4.Heating CapacityPower Supply : 230V Single Phase 60Hz Indoor Unit : CS-MKE9NKU×CU-3KE19NBU CS-MKE12NB4U×CU-4KE24NBU CS-MKE9NKU×CU-4KE24NBU CS-KE18NB4UW+ CS-MKE12NB4U+ CS-MKE12NB4UCU-4KE31NBU CS-MKE9NKU×CU-4KE31NBU CS-MKE9NB4U×6-1.Electric Wiring Diagrams 6. ELECTRICAL DATAOutdoor Unit CU-4KE24NBU 8FA2-5251-11500-1 Outdoor Unit CU-4KE31NBU 8FA2-5251-11300-1 7. FUNCTIONS 7-1.Explanation of FunctionsUnit operation Clean defrostControl/conditions ExplanationTable Temperature of releasingFig. Control/conditionsExplanation Control/conditionsUnit operation SENSOR1/f fluctuation fan Fig.< Low Ambient Cooling Operation > 7-2.Protective Functions 7-2-1.Defrost Detection and Release1Automatic frequency control 7-2-2.Current ControlDescription of function 2 Current control7-2-5.Control at HEAT Start-up 7-2-4.Compressor Temperature Control7-2-3.Low Start Current Reset conditions8. TROUBLESHOOTING BEFORE CALLING FOR SERVICE 8-2.Trouble Diagnosis by Error Monitor Lamps 8-2-1.Location of the Error Monitor Lamps8-2-2.Display of the Error Monitor Lamps 8-3.Checking the Outdoor System 8-3-1.Checking the outdoor unit8-3-2.Checking the defrost operation 8-4-1.Problems of Each Part and Inspection Points 8-4.Trouble Diagnosis of Each Part2 Fuse 8-4-2.Inspection Points for Each Part1 Outdoor control circuit board 3 Compressor7 Electric expansion valve 8 Branch tubing temperature sensor 9 Breaker10 Refrigerant gas pressure Diagnostic results 8-5.Trouble Diagnosis of Fan MotorDiagnostic procedure Remedy for symptom 3 to9-1-1.What is New Refrigerant R410A? SPECIAL PRECAUTIONS WHEN SERVICING UNIT9-1.Characteristics of New Refrigerant R410A 9-1-3.CharacteristicsSize of flare 9-2.Checklist before ServicingTubing precautions No addition of compressor oil for R410A9-4.Tubing Installation Procedures 9-3.Tools Specifically for R410A9-5-1.Procedure for Replacing Compressor 9-5.In Case of Compressor MalfunctionPage 9-6.In Case Refrigerant is Leaking 9-8. Retro-FittingExisting Systems 9-7-1.When Tubes are Extended9-7.Charging Additional Refrigerant 9-8-1.Use of Existing UnitsPage APPENDIX A INSTALLATION INSTRUCTIONS CU-3KE19NBU CU-4KE24NBU CU-4KE31NBUContents For Outdoor UnitWARNING When Wiring SPECIAL PRECAUTIONSIn Case of Improper Installation When Transporting‡RQRWLQVWDOORQO\DVLQJOHLQGRRUXQLW When ServicingOthers fins of the outdoor unit. You may get injured1. General 2. Installation Site Selection Limit of Elevation Max. Allowable TotalLimit of Required AmountOutdoor unit Outdoor unitIndoor unit 3/89.52mmOutdoor unit Outdoor unitIndoor unit Indoor unitOutdoor unit Outdoor unitIndoor unit Indoor unit5/815.88mm Outdoor unitIndoor unit CS-MKE24NKUAbout Dimensions Air Intake BaffleAir Discharge Baffle Dimensions1. Air Intake Baffle 3 Installation procedure4 Precautions for installation 2. Air Discharge BaffleFig. 6a unit: inch mm2-5.Outer Dimensions of Outdoor Unit Fig. 6bIndoor unit C Indoor unit B 2-6. Diagram of Outdoor Unit InstallationIndoor unit D Indoor unit C Indoor unit B3. Installation Process 3-1. Embedding the Tubing and WiringFig. D C B3-4.Caution before Connecting Tubes Tightly Fig.3-6.Insulation of Refrigerant Tubing 4. Air Purging Air Purging with a Vacuum Pump for Test Runadapter manual, and use the adapter correctly Fig.Table Pump Down gas without releasing it into the atmosphere5-2.Recommended Wire Length and Diameter 5. Wiring Instructions5-1.General Precautions on Wiring TableEach wire must be firmly connected 5-4.How to Connect Wiring to the Terminal 5-5.Wiring Instructions for the Outdoor Unit Fig.Performing a test run 6. Test RunChecking tubing and wiring Fig.7. Connecting a Home Automation Device 8. Installation Check SheetDC1111-0