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Panasonic CU-4KE31NBU, CU-4KE24NBU, CU-3KE19NBU service manual 1/f fluctuation fan, Fig

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

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1/f fluctuation fan

1/f fluctuation fan

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Panasonic CU-4KE31NBU, CU-4KE24NBU, CU-3KE19NBU service manual 1/f fluctuation fan, Fig

Contents

Pay special attention when servicing the unit OUTDOOR UNIT : CU-3KE19NBU CU-4KE24NBUCU-4KE31NBU TECHNICAL & SERVICE MANUALSAFETY PRECAUTIONS which may cause a unit breakdown TROUBLESHOOTING BEFORE CALLING FOR SERVICE Table of ContentsSPECIFICATIONS REFRIGERANT FLOW DIAGRAMSPECIAL PRECAUTIONS WHEN SERVICING UNIT 9. REFRIGERANT R410AAPPENDIX A APPLICABLE INDOOR UNITS Wall Mounted TypeSemi-ConcealedType Outdoor Air Intake Temp 1. OPERATING RANGETemperature Indoor Air Intake TempNumber of Connectable Indoor Units 2. SPECIFICATIONS2-1.Unit Specifications TypeVoltage Rating TypeNumber of Connectable Indoor Units Number of Operatable Indoor UnitsVoltage Rating TypeNumber of Connectable Indoor Units Number of Operatable Indoor UnitsVoltage Rating TypeNumber of Connectable Indoor Units Number of Operatable Indoor UnitsVoltage Rating TypeNumber of Connectable Indoor Units Number of Operatable Indoor UnitsVoltage Rating TypeNumber of Connectable Indoor Units Number of Operatable Indoor UnitsVoltage Rating TypeNumber of Connectable Indoor Units Number of Operatable Indoor UnitsVoltage Rating TypeNumber of Connectable Indoor Units Number of Operatable Indoor UnitsVoltage Rating TypeNumber of Connectable Indoor Units Number of Operatable Indoor UnitsCompressor 2-2.Major Component Specifications2-2-1.Outdoor Unit Control PCBHeat Exchanger Coil Control PCBCompressor Fan MotorHeat Exchanger Coil Control PCBCompressor Fan MotorResistance k ohm 2-3.Other Component SpecificationsTemperature F C Temperature F CUnit: inchmm 852-0-0010-11200-0 3. DIMENSIONAL DATAUnit 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× Cooling Characteristics Heating CharacteristicsIndoor Unit CS-MKE18NKU× Indoor Unit CS-MKE9NB4U× Indoor Unit CS-MKE12NB4U× Heating CharacteristicsCooling Characteristics Outdoor Unit CU-3KE19NBUIndoor Unit CS-KE12NB4UW× Indoor Unit CS-MKE7NKU× 5-1-2.Temperature Charts CU-4KE24NBUcurrent Indoor Unit CS-MKE9NKU×wideat wideatIndoor Unit CS-MKE12NKU× Heating CharacteristicsCooling Characteristics Outdoor Unit CU-4KE24NBU1 High pressure performance chart Cooling CharacteristicsHeating Characteristics 1 Low pressure performance chartIndoor Unit CS-MKE24NKU× Indoor Unit CS-MKE9NB4U× Indoor Unit CS-MKE12NB4U× Heating CharacteristicsCooling Characteristics Outdoor Unit CU-4KE24NBU1 High pressure performance chart Cooling CharacteristicsHeating Characteristics 1 Low pressure performance chartIndoor Unit CS-MKE7NKU× 5-1-3.Temperature Charts CU-4KE31NBUIndoor Unit CS-MKE9NKU× Indoor Unit CS-MKE12NKU× Indoor Unit CS-MKE18NKU× Indoor Unit CS-MKE24NKU× 1 High pressure performance chart Cooling CharacteristicsHeating Characteristics 1 Low pressure performance chartIndoor Unit CS-MKE12NB4U× tempIndoor 70F Indoor Unit CS-KE12NB4UW× Indoor Unit : CS-MKE9NKU× 5-2.Cooling CapacityPower Supply : 230V Single Phase 60Hz Outdoor Unit : CU-3KE19NBUCS-MKE12NB4U× CU-3KE19NBUCS-MKE9NKU× CU-4KE24NBUCS-KE18NB4UW+ CS-MKE12NB4U+ CS-MKE12NB4U CU-4KE24NBUCS-MKE9NKU× CU-4KE31NBUCS-MKE9NB4U× CU-4KE31NBUIndoor Unit CS-MKE9NKU× 5-3.Cooling Capacity Low AmbientPower Supply : 230V Single Phase 60Hz Outdoor Unit : CU-3KE19NBUCS-MKE12NB4U× CU-3KE19NBUCS-MKE9NKU× CU-4KE24NBUCS-KE18NB4UW+ CS-MKE12NB4U+ CS-MKE12NB4U CU-4KE24NBUCS-MKE9NKU× CU-4KE31NBUCS-MKE9NB4U× CU-4KE31NBUIndoor Unit : CS-MKE9NKU× 5-4.Heating CapacityPower Supply : 230V Single Phase 60Hz Outdoor Unit : CU-3KE19NBUCS-MKE12NB4U× CU-3KE19NBUCS-MKE9NKU× CU-4KE24NBUCS-KE18NB4UW+ CS-MKE12NB4U+ CS-MKE12NB4U CU-4KE24NBUCS-MKE9NKU× CU-4KE31NBUCS-MKE9NB4U× CU-4KE31NBU6. ELECTRICAL DATA 6-1.Electric Wiring DiagramsOutdoor Unit CU-4KE24NBU 8FA2-5251-11500-1 Outdoor Unit CU-4KE31NBU 8FA2-5251-11300-1 7-1.Explanation of Functions 7. FUNCTIONSExplanation Clean defrostControl/conditions Unit operationControl/conditions Temperature of releasingFig. TableSENSOR Control/conditionsUnit operation ExplanationFig. 1/f fluctuation fan< Low Ambient Cooling Operation > 7-2-1.Defrost Detection and Release 7-2.Protective Functions2 Current control 7-2-2.Current ControlDescription of function 1Automatic frequency controlReset conditions 7-2-4.Compressor Temperature Control7-2-3.Low Start Current 7-2-5.Control at HEAT Start-up8. 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.Trouble Diagnosis of Each Part 8-4-1.Problems of Each Part and Inspection Points3 Compressor 8-4-2.Inspection Points for Each Part1 Outdoor control circuit board 2 Fuse7 Electric expansion valve 8 Branch tubing temperature sensor 9 Breaker10 Refrigerant gas pressure Remedy for symptom 3 to 8-5.Trouble Diagnosis of Fan MotorDiagnostic procedure Diagnostic results9-1-3.Characteristics SPECIAL PRECAUTIONS WHEN SERVICING UNIT9-1.Characteristics of New Refrigerant R410A 9-1-1.What is New Refrigerant R410A?No addition of compressor oil for R410A 9-2.Checklist before ServicingTubing precautions Size of flare9-3.Tools Specifically for R410A 9-4.Tubing Installation Procedures9-5.In Case of Compressor Malfunction 9-5-1.Procedure for Replacing CompressorPage 9-6.In Case Refrigerant is Leaking 9-8-1.Use of Existing Units 9-7-1.When Tubes are Extended9-7.Charging Additional Refrigerant 9-8. Retro-FittingExisting SystemsPage CU-3KE19NBU CU-4KE24NBU CU-4KE31NBU APPENDIX A INSTALLATION INSTRUCTIONSFor Outdoor Unit ContentsWhen Transporting SPECIAL PRECAUTIONSIn Case of Improper Installation WARNING When Wiringfins of the outdoor unit. You may get injured When ServicingOthers ‡RQRWLQVWDOORQO\DVLQJOHLQGRRUXQLW1. General 2. Installation Site Selection Required Amount Max. Allowable TotalLimit of Limit of Elevation3/89.52mm Outdoor unitIndoor unit Outdoor unitIndoor unit Outdoor unitIndoor unit Outdoor unitIndoor unit Outdoor unitIndoor unit Outdoor unitCS-MKE24NKU Outdoor unitIndoor unit 5/815.88mmAbout Dimensions Air Intake BaffleAir Discharge Baffle Dimensions2. Air Discharge Baffle 3 Installation procedure4 Precautions for installation 1. Air Intake BaffleFig. 6b unit: inch mm2-5.Outer Dimensions of Outdoor Unit Fig. 6aIndoor unit C Indoor unit B 2-6. Diagram of Outdoor Unit InstallationIndoor unit D Indoor unit C Indoor unit B3-1. Embedding the Tubing and Wiring 3. Installation ProcessFig. D C B3-4.Caution before Connecting Tubes Tightly Fig.3-6.Insulation of Refrigerant Tubing Air Purging with a Vacuum Pump for Test Run 4. Air Purgingadapter manual, and use the adapter correctly Fig.Table gas without releasing it into the atmosphere Pump DownTable 5. Wiring Instructions5-1.General Precautions on Wiring 5-2.Recommended Wire Length and DiameterEach wire must be firmly connected 5-4.How to Connect Wiring to the Terminal Fig. 5-5.Wiring Instructions for the Outdoor UnitFig. 6. Test RunChecking tubing and wiring Performing a test run8. Installation Check Sheet 7. Connecting a Home Automation DeviceDC1111-0