Manuals / Panasonic / Household Appliance / Air Conditioner

Panasonic CZ-18BT1U + CU-KS18NKUA, CS-KS12NB41 Outdoor Unit CU-KS12NK1A, 8FA2-5251-12300-2

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

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8FA2-5251-12300-2

Outdoor Unit CU-KS12NK1A

8FA2-5251-12300-2

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Panasonic CZ-18BT1U + CU-KS18NKUA, CS-KS12NB41, CS-KS18NB4UW service manual Outdoor Unit CU-KS12NK1A, 8FA2-5251-12300-2

Contents

CS-KS18NB4UWBody & CZ-18BT1UPanel CS-KS12NB41Body & CZ-18BT1UPanelCU-KS12NK1A CU-KS18NKU CU-KS18NKUASAFETY PRECAUTIONS which may cause a unit breakdown Table of Contents 10. CHECKING ELECTRICAL COMPONENTS Temperature 1. OPERATING RANGETemperature Indoor Air Intake TempUnit Specifications 2. SPECIFICATIONS2-1-1 Voltage RatingDimensions & 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 230VDimensions & Weight Outdoor Unit Dimensions & Weight Indoor UnitCS-KS18NB4UW& CZ-18BT1U Outdoor Unit CU-KS18NKUA 2-1-5. Indoor Unit208V Voltage RatingDimensions & 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 C3. DIMENSIONAL DATA Unit inch mm Unit inch mm CU-KS18NKUA4-1.Refrigerant Flow Diagram 4. REFRIGERANT FLOW DIAGRAMIndoor unit CU-KS18NKUAOutdoor unit 5. PERFORMANCE DATA 5-1.Temperature ChartsOutdoor 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 CharacteristicsCU-KS18NKU CS-KS18NB4UW& CZ-18BT1UCooling CoolingIndoor Unit 6-2.Electric Wiring DiagramsCS-KS18NB4UW CS-KS12NB418FA2-5251-12300-2 Outdoor Unit CU-KS12NK1AOutdoor Unit CU-KS18NKU CU-KS18NKUA 7-1.Address Setting of the Remote Controller 7. MAINTENANCEHow to Connect How to DisconnectPull the cover upward 7-3-1.Remove the air intake grill 7-3.Disassembly Procedure7-3-3.Remove the ceiling panel 7-3-5.Remove the power box and control box 7-3-4.Remove the indoor air temperature sensorCN07 Screw Ground cableScrew Screw Screw Screw7-3-6.Remove the main body lower section 7-3-7.Remove the heat exchanger sensor 7-3-8.Remove the drain pump and float switch7-3-10.Remove the heat exchanger 7-3-9.Remove the turbo fan and fan motor8-1.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 HIGH POWER lamp TIMER lampREMOTE CONTROL receiver DIAGNOSIS CONTENTS9-3.Checking the Indoor and Outdoor Units 3-1Condition E01 Before the OperationContinued from the previous page A 3-2Condition E12 9-4-1.Indoor Fan Motor 9-4.Trouble Diagnosis of Fan MotorDiagnostic procedure 9-4-2.Outdoor Fan MotorDiagnostic results Remedy for symptom 3 toTrouble Locations most susceptible to noiseCorrection Locations most susceptible to noise10. CHECKING ELECTRICAL COMPONENTS 10-1-1.Power Supply Cord10-1.Measurement of Insulation Resistance 10-1-2.Indoor Unit10-2.Checking Continuity of Fuse on PCB Assy 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 Procedures11-5.In Case of Compressor Malfunction 11-5-1.Procedure for Replacing CompressorPage 11-6.In Case Refrigerant is Leaking 11-7.Charging Additional Refrigerant 11-7-1.When Tubes are Extended11-8. Retro-FittingExisting Systems 11-8-1.Use of Existing Units