Carrier 50FK, JK034-074, 48FK specifications Service Training, Call for Free Catalog

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SERVICE TRAINING

Packaged Service Training programs are an excellent way to increase your knowledge of the equip- ment discussed in this manual, including:

·	Unit Familiarization	·	Maintenance
·	Installation Overview	·	Operating Sequence

A large selection of product, theory, and skills programs are available, using popular video-based for- mats and materials. All include video and/or slides, plus companion book.

Classroom Service Training which includes ``hands-on'' experience with the products in our labs can mean increased con®dence that really pays dividends in faster troubleshooting and fewer callbacks. Course descriptions and schedules are in our catalog.

CALL FOR FREE CATALOG 1-800-962-9212

[ ] Packaged Service Training [ ] Classroom Service Training

Copyright 1999 Carrier Corporation

Manufacturer reserves the right to discontinue, or change at any time, speci®cations or designs without notice and without incurring obligations.

Book	1	1		PC 111	Catalog No. 534-716	Printed in U.S.A.	Form 48/50F,J-1T	Pg 58	4-99	Replaces: 48/50D,F,J-1T
Tab	1a	1b

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Contents Controls Operation Troubleshooting ContentsSafety Considerations GeneralDIP Pin Terminal Connector J1 Thermistor InputsConnector J1 Temperature Unit Size Terminal no Input EXV034-104 Status Switch InputsConnector J2 Status Switch Unit Size Terminal no RNT Ð ReturnPage HIR Output Pin and Terminal AssignmentsOutput PIN Name Rating Device Terminal 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 SizeSwitch DPS Ð Differential Pressure SwitchTerminal Block Modulating Power Exhaust Differential Pressure Switch Sizes START-UPPotentiometer Inputs and Ranges Conguration Header DIP Switch Factory SettingsConguration Header Jumpers DIP Switches Switch Function Meaning PositionInlet Guide Vane Motor 50FK,JK034-074 Units Jumper Removal to Disable Motor Variable Frequency Drive KeypadControl Signal Pressure VFD SET Point VFD Set Point Frequency Command for Duct PressureChanging the VFD Set Point Frequency Command PressureStart Unit Quick Test, Unit Conguration and Switch Check Quick Normal Description Control Switch Test Display Step noQuick Normal Description Thermistor or Test Quick Test, Thermistor and Potentiometer CheckQuick Test, Output Relay Check 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 088 Units Cooling Size 054 UnitsCooling Size 064 Units Cooling Size 104 UnitsSymptoms Probable Causes Solutions TroubleshootingControls Troubleshooting Operation Status CodesDiagnostic Codes Codes 71 to 76 THERMISTOR/RESISTOR Failure Page TP4 Terminals Voltage ACTest PIN Voltage DC TP3 TP6Quick Test J9 PIN Numbers Step no PIN Terminal Voltage DCTerminal Strip J6 Connection Resistance Reading Pin Terminal Connector J1 VoltagesPin Terminal Connector J2 Voltages PIN Voltage TerminalEnthalpy Sensor Checkout Terminal Strip J5 Connector Resistance ReadingQuick Test J5 PIN Numbers Step no Variable Frequency Drive Carrier Default Program Parameter Values Parameter Group Default ValueRequired User Adjusted Defaults Motor Overload SettingsLPS ALMLAT MTRPage Page Service Training Call for Free CatalogII. Preliminary Checklist Items PRE-START-UPIII. START-UP IV. Notes