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Panasonic CU-4KE24NBU, CU-4KE31NBU, CU-3KE19NBU service manual DC1111-0

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

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DC1111-0

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Panasonic CU-4KE24NBU, CU-4KE31NBU, CU-3KE19NBU service manual DC1111-0

Contents

OUTDOOR UNIT : CU-3KE19NBU CU-4KE24NBU CU-4KE31NBUTECHNICAL & SERVICE MANUAL Pay special attention when servicing the unitSAFETY PRECAUTIONS which may cause a unit breakdown Table of Contents SPECIFICATIONSREFRIGERANT FLOW DIAGRAM TROUBLESHOOTING BEFORE CALLING FOR SERVICE9. REFRIGERANT R410A SPECIAL PRECAUTIONS WHEN SERVICING UNITAPPENDIX A Wall Mounted Type APPLICABLE INDOOR UNITSSemi-ConcealedType 1. OPERATING RANGE TemperatureIndoor Air Intake Temp Outdoor Air Intake Temp2. SPECIFICATIONS 2-1.Unit SpecificationsType Number of Connectable Indoor UnitsType Number of Connectable Indoor UnitsNumber of Operatable Indoor Units Voltage RatingType Number of Connectable Indoor UnitsNumber of Operatable Indoor Units Voltage RatingType Number of Connectable Indoor UnitsNumber of Operatable Indoor Units Voltage RatingType Number of Connectable Indoor UnitsNumber of Operatable Indoor Units Voltage RatingType Number of Connectable Indoor UnitsNumber of Operatable Indoor Units Voltage RatingType Number of Connectable Indoor UnitsNumber of Operatable Indoor Units Voltage RatingType Number of Connectable Indoor UnitsNumber of Operatable Indoor Units Voltage RatingType Number of Connectable Indoor UnitsNumber of Operatable Indoor Units Voltage Rating2-2.Major Component Specifications 2-2-1.Outdoor UnitControl PCB CompressorControl PCB CompressorFan Motor Heat Exchanger CoilControl PCB CompressorFan Motor Heat Exchanger Coil2-3.Other Component Specifications Temperature F CTemperature F C Resistance k ohm3. DIMENSIONAL DATA Unit: inchmm 852-0-0010-11200-0Unit inchmm Unit inchmm 4-1.Refrigerant Flow Diagram 4. REFRIGERANT FLOW DIAGRAMInsulation of Refrigerant Tubing Indoor unit Insulation of Refrigerant TubingOutdoor unit Indoor unit Insulation of Refrigerant TubingOutdoor unit 5-1-1.Temperature Charts CU-3KE19NBU 5-1.Temperature Charts5. PERFORMANCE DATA Indoor Unit CS-MKE9NKU× Heating Characteristics Cooling CharacteristicsIndoor Unit CS-MKE18NKU× Indoor Unit CS-MKE9NB4U× Heating Characteristics Cooling CharacteristicsOutdoor Unit CU-3KE19NBU Indoor Unit CS-MKE12NB4U×Indoor Unit CS-KE12NB4UW× 5-1-2.Temperature Charts CU-4KE24NBU Indoor Unit CS-MKE7NKU×Indoor Unit CS-MKE9NKU× wideatwideat currentHeating Characteristics Cooling CharacteristicsOutdoor Unit CU-4KE24NBU Indoor Unit CS-MKE12NKU×Cooling Characteristics Heating Characteristics1 Low pressure performance chart 1 High pressure performance chartIndoor Unit CS-MKE24NKU× Indoor Unit CS-MKE9NB4U× Heating Characteristics Cooling CharacteristicsOutdoor Unit CU-4KE24NBU Indoor Unit CS-MKE12NB4U×Cooling Characteristics Heating Characteristics1 Low pressure performance chart 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× Cooling Characteristics Heating Characteristics1 Low pressure performance chart 1 High pressure performance charttemp Indoor Unit CS-MKE12NB4U×Indoor 70F Indoor Unit CS-KE12NB4UW× 5-2.Cooling Capacity Power Supply : 230V Single Phase 60HzOutdoor Unit : CU-3KE19NBU 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×5-3.Cooling Capacity Low Ambient Power Supply : 230V Single Phase 60HzOutdoor Unit : CU-3KE19NBU 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×5-4.Heating Capacity Power Supply : 230V Single Phase 60HzOutdoor Unit : CU-3KE19NBU 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 FunctionsClean defrost Control/conditionsUnit operation ExplanationTemperature of releasing Fig.Table Control/conditionsControl/conditions Unit operationExplanation SENSOR1/f fluctuation fan Fig.< Low Ambient Cooling Operation > 7-2.Protective Functions 7-2-1.Defrost Detection and Release7-2-2.Current Control Description of function1Automatic frequency control 2 Current control7-2-4.Compressor Temperature Control 7-2-3.Low Start Current7-2-5.Control at HEAT Start-up Reset conditions8. TROUBLESHOOTING BEFORE CALLING FOR SERVICE 8-2-1.Location of the Error Monitor Lamps 8-2.Trouble Diagnosis by Error Monitor Lamps8-2-2.Display of the Error Monitor Lamps 8-3-1.Checking the outdoor unit 8-3.Checking the Outdoor System8-3-2.Checking the defrost operation 8-4-1.Problems of Each Part and Inspection Points 8-4.Trouble Diagnosis of Each Part8-4-2.Inspection Points for Each Part 1 Outdoor control circuit board2 Fuse 3 Compressor7 Electric expansion valve 9 Breaker 8 Branch tubing temperature sensor10 Refrigerant gas pressure 8-5.Trouble Diagnosis of Fan Motor Diagnostic procedureDiagnostic results Remedy for symptom 3 toSPECIAL PRECAUTIONS WHEN SERVICING UNIT 9-1.Characteristics of New Refrigerant R410A9-1-1.What is New Refrigerant R410A? 9-1-3.Characteristics9-2.Checklist before Servicing Tubing precautionsSize of flare 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 9-7-1.When Tubes are Extended 9-7.Charging Additional Refrigerant9-8. Retro-FittingExisting Systems 9-8-1.Use of Existing UnitsPage APPENDIX A INSTALLATION INSTRUCTIONS CU-3KE19NBU CU-4KE24NBU CU-4KE31NBUContents For Outdoor UnitSPECIAL PRECAUTIONS In Case of Improper InstallationWARNING When Wiring When TransportingWhen Servicing Others‡RQRWLQVWDOORQO\DVLQJOHLQGRRUXQLW fins of the outdoor unit. You may get injured1. General 2. Installation Site Selection Max. Allowable Total Limit ofLimit of Elevation Required AmountOutdoor unit Indoor unitOutdoor unit 3/89.52mmOutdoor unit Indoor unitOutdoor unit Indoor unitOutdoor unit Indoor unitOutdoor unit Indoor unitOutdoor unit Indoor unit5/815.88mm CS-MKE24NKUAbout Air Intake Baffle Air Discharge BaffleDimensions Dimensions3 Installation procedure 4 Precautions for installation1. Air Intake Baffle 2. Air Discharge Baffleunit: inch mm 2-5.Outer Dimensions of Outdoor UnitFig. 6a Fig. 6b2-6. Diagram of Outdoor Unit Installation Indoor unit DIndoor unit C Indoor unit B Indoor unit C Indoor unit B3. Installation Process 3-1. Embedding the Tubing and WiringD C B 3-4.Caution before Connecting Tubes TightlyFig. Fig.3-6.Insulation of Refrigerant Tubing 4. Air Purging Air Purging with a Vacuum Pump for Test RunFig. adapter manual, and use the adapter correctlyTable Pump Down gas without releasing it into the atmosphere5. Wiring Instructions 5-1.General Precautions on Wiring5-2.Recommended Wire Length and Diameter TableEach wire must be firmly connected 5-4.How to Connect Wiring to the Terminal 5-5.Wiring Instructions for the Outdoor Unit Fig.6. Test Run Checking tubing and wiringPerforming a test run Fig.7. Connecting a Home Automation Device 8. Installation Check SheetDC1111-0