Carrier 48FK, JK034-074, 50FK specifications

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Fig. 55 Ð Typical Wiring Schematic; 48FK,JK and 50FK,FY,JK,JY Units (054-074 Shown)

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Contents Controls Operation Troubleshooting ContentsSafety Considerations GeneralPin Terminal Connector J1 Thermistor Inputs Connector J1 Temperature Unit Size Terminal no InputDIP EXVStatus Switch Inputs Connector J2 Status Switch Unit Size Terminal no034-104 RNT Ð ReturnPage Output Pin and Terminal Assignments Output PIN Name Rating Device TerminalHIR IFCCompressor Operation Thermistor T1 Location, 50FK,JK034-048 Units Thermistor T1 Location, 50FK,JK054-074 Units Thermistor T2 Location, Size 034-048 Units Thermistor T3 and T4 Locations, Size 054-104 Units Integrated Circuit InputControls Installation Space Temperature ResetUnit Control Box Arrangement, Sizes Unit Control Box Arrangement, Sizes Unit Control Box Arrangement, Sizes 088 Voltage Drop Characteristics Thermistor ResistanceSpace Temperature Sensor Averaging Single-Step Demand Limit MSP = Sasp + Remote Sasp Wiring Smoke Control Switches Required for Each Mode Smoke Control ModesSwitch Functions Tubing SizeTerminal Block DPS Ð Differential Pressure SwitchSwitch Modulating Power Exhaust Differential Pressure Switch Sizes START-UPConguration Header Jumpers Conguration Header DIP Switch Factory SettingsPotentiometer Inputs and Ranges DIP Switches Switch Function Meaning PositionInlet Guide Vane Motor 50FK,JK034-074 Units Jumper Removal to Disable Motor Variable Frequency Drive KeypadVFD Set Point Frequency Command for Duct Pressure Changing the VFD Set Point Frequency CommandControl Signal Pressure VFD SET Point PressureStart Unit Quick Test, Unit Conguration and Switch Check Quick Normal Description Control Switch Test Display Step noQuick Test, Thermistor and Potentiometer Check Quick Test, Output Relay CheckQuick Normal Description Thermistor or Test Quick Normal Test Description Relay NumberOperating Information Sensor Resistance ValuesPage Component Arrangement, 034-048 Units Component Arrangement, 054-104 Units Page Modulating Power Exhaust Component Locations Sizes Modulating Power Exhaust Component Locations Sizes Page Compressor Loading and Unloading Sequences Cooling Size 054 Units Cooling Size 064 UnitsCooling Size 088 Units Cooling Size 104 UnitsTroubleshooting Controls TroubleshootingSymptoms Probable Causes Solutions Operation Status CodesDiagnostic Codes Codes 71 to 76 THERMISTOR/RESISTOR Failure Page Terminals Voltage AC Test PIN Voltage DC TP3TP4 TP6Quick Test J9 PIN Numbers Step no PIN Terminal Voltage DCPin Terminal Connector J1 Voltages Pin Terminal Connector J2 VoltagesTerminal Strip J6 Connection Resistance Reading PIN Voltage TerminalQuick Test J5 PIN Numbers Step no Terminal Strip J5 Connector Resistance ReadingEnthalpy Sensor Checkout Variable Frequency Drive Carrier Default Program Parameter Values Parameter Group Default ValueRequired User Adjusted Defaults Motor Overload SettingsALM LATLPS MTRPage Page Service Training Call for Free CatalogII. Preliminary Checklist Items PRE-START-UPIII. START-UP IV. Notes