Carrier 48FK, JK034-074, 50FK specifications Thermistor T3 and T4 Locations, Size 054-104 Units

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054 UNITS

064, 074, 078 UNITS

088, 104 UNITS

Fig. 14 Ð Thermistor T3 and T4 Locations, Size 054-104 Units

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Contents Contents Controls Operation TroubleshootingGeneral Safety ConsiderationsEXV Pin Terminal Connector J1 Thermistor InputsConnector J1 Temperature Unit Size Terminal no Input DIPRNT Ð Return Status Switch InputsConnector J2 Status Switch Unit Size Terminal no 034-104Page IFC Output Pin and Terminal AssignmentsOutput PIN Name Rating Device Terminal HIRCompressor 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 Input Integrated CircuitSpace Temperature Reset Controls InstallationUnit Control Box Arrangement, Sizes Unit Control Box Arrangement, Sizes Unit Control Box Arrangement, Sizes 088 Thermistor Resistance Voltage Drop CharacteristicsSpace Temperature Sensor Averaging Single-Step Demand Limit MSP = Sasp + Remote Sasp Wiring Smoke Control Modes Smoke Control Switches Required for Each ModeTubing Size Switch FunctionsTerminal Block DPS Ð Differential Pressure SwitchSwitch START-UP Modulating Power Exhaust Differential Pressure Switch SizesConguration Header Jumpers Conguration Header DIP Switch Factory SettingsPotentiometer Inputs and Ranges Switch Function Meaning Position DIP SwitchesInlet Guide Vane Motor 50FK,JK034-074 Units Variable Frequency Drive Keypad Jumper Removal to Disable MotorPressure VFD Set Point Frequency Command for Duct PressureChanging the VFD Set Point Frequency Command Control Signal Pressure VFD SET PointStart Unit Quick Normal Description Control Switch Test Display Step no Quick Test, Unit Conguration and Switch CheckQuick Normal Test Description Relay Number Quick Test, Thermistor and Potentiometer CheckQuick Test, Output Relay Check Quick Normal Description Thermistor or TestSensor Resistance Values Operating InformationPage 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 104 Units Cooling Size 054 UnitsCooling Size 064 Units Cooling Size 088 UnitsOperation Status Codes TroubleshootingControls Troubleshooting Symptoms Probable Causes SolutionsDiagnostic Codes Codes 71 to 76 THERMISTOR/RESISTOR Failure Page TP6 Terminals Voltage ACTest PIN Voltage DC TP3 TP4PIN Terminal Voltage DC Quick Test J9 PIN Numbers Step noPIN Voltage Terminal Pin Terminal Connector J1 VoltagesPin Terminal Connector J2 Voltages Terminal Strip J6 Connection Resistance ReadingQuick Test J5 PIN Numbers Step no Terminal Strip J5 Connector Resistance ReadingEnthalpy Sensor Checkout Variable Frequency Drive Parameter Group Default Value Carrier Default Program Parameter ValuesMotor Overload Settings Required User Adjusted DefaultsMTR ALMLAT LPSPage Page Call for Free Catalog Service TrainingPRE-START-UP II. Preliminary Checklist ItemsIV. Notes III. START-UP