Manuals / Panasonic / Household Appliance / Air Conditioner

Panasonic CU-KE18NKU, CS-KE18NB4UW, CS-KE12NB41 Outdoor Unit CU-KE12NK1, 8FA2-5251-12200-2

Models: CZ-18BT1U CS-KE12NB41 CS-KE18NB4UW CU-KE18NKU CU-KE12NK1

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8FA2-5251-12200-2

Outdoor Unit CU-KE12NK1

8FA2-5251-12200-2

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Panasonic CU-KE18NKU, CS-KE18NB4UW, CS-KE12NB41, CZ-18BT1U service manual Outdoor Unit CU-KE12NK1, 8FA2-5251-12200-2

Contents

CU-KE12NK1 CU-KE18NKU Indoor UnitOutdoor Unit DC INVERTER SPLIT SYSTEM AIR CONDITIONERSAFETY PRECAUTIONS which may cause a unit breakdown Table of Contents Page 1. OPERATING RANGE TemperatureIndoor Air Intake Temp Outdoor Air Intake Temp2. SPECIFICATIONS 2-1.Unit SpecificationsVoltage Rating Dimensions & Weight Indoor Unit Dimensions & Weight Outdoor UnitIndoor Unit CS-KE12NB41& CZ-18BT1U2-1-2. Indoor Unit CS-KE18NB4UW& CZ-18BT1UOutdoor Unit CU-KE18NKUDimensions & Weight Indoor Unit Dimensions & Weight Outdoor UnitCS-KE18NB4UW& CZ-18BT1U CU-KE18NKU2-1-3. Indoor Unit CS-KE18NB4UW& CZ-18BT1UOutdoor Unit CU-KE18NKUDimensions & Weight Indoor Unit Dimensions & Weight Outdoor UnitCS-KE18NB4UW& CZ-18BT1U CU-KE18NKU2-2.Major Component Specifications 2-2-1.Indoor UnitControl PCB Fan MotorControl PCB Fan MotorDrain Pump Heat Exchanger Coil2-2-2.Outdoor Unit Control PCBCompressor Fan MotorControl PCB CompressorFan Motor Heat Exchanger Coil2-3.Other Component Specifications 3. DIMENSIONAL DATA Unit : inch mm 852-0-0010-12700-0 Unit inch mm 4. REFRIGERANT FLOW DIAGRAM 4-1.Refrigerant Flow DiagramIndoor unit Outdoor unit5-1.Temperature Charts 5. PERFORMANCE DATAcurrent Operating1 High pressure performance chart 2 Operating current performance chart3 Indoor discharge air performance chart Page Temp Indoor5-2.Cooling Capacity CS-KE12NB41& CZ-18BT1UCU-KE12NK1 Power Supply 230V Single Phase 60Hz Indoor UnitCS-KE18NB4UW& CZ-18BT1U Outdoor Unit5-3.Cooling Capacity Low Ambient CS-KE12NB41& CZ-18BT1UCU-KE12NK1 CS-KE18NB4UW& CZ-18BT1U CU-KE18NKU5-4.Heating Capacity CS-KE12NB41& CZ-18BT1UCU-KE12NK1 CS-KE18NB4UW& CZ-18BT1U CU-KE18NKU6-1.Electrical Characteristics 6. ELECTRICAL DATACZ-KE18NB4U& CZ-18BT1U CU-KE18NKU1 Voltage Cooling6-2.Electric Wiring Diagrams Indoor UnitCS-KE18NB4UW CS-KE12NB41Outdoor Unit CU-KE12NK1 8FA2-5251-12200-2CONTROLLER 7. MAINTENANCE 7-1.Address Setting of the Remote ControllerHow to Disconnect How to ConnectPull the cover upward 7-3.Disassembly Procedure 7-3-1.Remove the air intake grill7-3-3.Remove the ceiling panel 7-3-4.Remove the indoor air temperature sensor 7-3-5.Remove the power box and control boxScrew Ground cable CN07Screw Screw Screw Screw7-3-6.Remove the main body lower section 7-3-8.Remove the drain pump and float switch 7-3-7.Remove the heat exchanger sensor7-3-9.Remove the turbo fan and fan motor 7-3-10.Remove the heat exchanger8. FUNCTIONS 8-1.Operation FunctionsEmergency operation AUTO cooling/heating operationHIGH POWER Timer backupNIGHT SETBACK Lamp colorsCompressor discharge temperature control 8-2.Protective FunctionsOverload prevention during heating Freeze preventionDefrost detection and release CT Peak current cut-offcontrolDefrosting Sequence 9. TROUBLESHOOTING BEFORE CALLING FOR SERVICE 9-2.Method of Self-DiagnosticsPROCEDURE TIMER lamp HIGH POWER lampREMOTE CONTROL receiver DIAGNOSIS CONTENTS9-3.Checking the Indoor and Outdoor Units Before the Operation 3-1Condition E01Continued from the previous page A 3-2Condition E12 9-4.Trouble Diagnosis of Fan Motor 9-4-1.Indoor Fan Motor9-4-2.Outdoor Fan Motor Diagnostic procedureDiagnostic results Remedy for symptom 3 toLocations most susceptible to noise TroubleCorrection Locations most susceptible to noise10-1-1.Power Supply Cord 10. CHECKING ELECTRICAL COMPONENTS10-1.Measurement of Insulation Resistance 10-1-2.Indoor Unit10-2.Checking Continuity of Fuse on PCB Assy SPECIAL PRECAUTIONS WHEN SERVICING UNIT 11-1.Characteristics of New Refrigerant R410A11-1-1.What is New Refrigerant R410A? 11-1-3.Characteristics11-2.Checklist before Servicing Tubing precautionsSize of flare No addition of compressor oil for R410A11-4.Tubing Installation Procedures 11-3.Tools Specifically for R410A11-5-1.Procedure for Replacing Compressor 11-5.In Case of Compressor MalfunctionPage 11-6.In Case Refrigerant is Leaking 11-7-1.When Tubes are Extended 11-7.Charging Additional Refrigerant11-8. Retro-FittingExisting Systems 11-8-1.Use of Existing Units