Sterling 882.00274.00 Troubleshooting, Introduction, Problem Possible cause Corrective action

Page 37

Chapter 6: Troubleshooting

6-1 Introduction

The utmost in safety precautions should be observed at all times when working on or around the machine and the electrical components. All normal trouble-shooting must be accomplished with the power off, line fuses removed, and with the machine tagged as out of service.

The use of good quality test equipment cannot be over-emphasized when troubleshooting is indicated. Use a good ammeter that can measure at least twice the AC and DC current that can be encountered for the machine. Be sure that the voltmeter has at least minimum impedance of 5,000 OHMS-per-volt on AC and 20,000 OHMS-per-volt on DC scales. Popular combination meters, VOM and VTVM can be selected to provide the necessary functions.

Before making haphazard substitutions and repairs when defective electrical components are malfunctioning, we recommend that you check the associated circuitry and assemblies for other defective devices. It is common to replace the obviously damaged component without actually locating the real cause of the trouble. Such hasty substitutions will only destroy the new component. Refer to wiring diagrams and schematics.

Locating mechanical problems, should they occur, is relatively straightforward. When necessary, refer to the parts catalog section.

Problem	Possible cause	Corrective action

	No power to the control.	Plug in control.
	Power switch is off.	Turn power on.
	Fuse is blown.	Replace fuse.
	Auger is jammed.	Clear.
	Loose control wiring.	Tighten.
	Power switch has failed.	Replace.
	Motor switch has failed.	Replace.
Feeder will not run with switch	Feeder is wired incorrectly to	Refer to the control enclosure
Feeder will not run with switch	the processing machine.	wiring diagram.
in AUTO or MANUAL position.	Control relay has failed.	Replace.
	Motor control has failed.	Replace.
	Motor brushes are worn.	Replace.
	Controller is in the program	Reset DIP Switch 7.
	mode. Display reads PROG.
	Optional timer set incorrectly.	Reset timer.
	Optional timer mode set	Set operation mode to H and
	incorrectly.	configuration to d.
	Optional timer has failed.	Replace.

Additive Feeders

Chapter 6: Troubleshooting

36 of 50

Image 37

Contents SF Series Additive Feeders Parts and Service Department Shipping Information Table of Contents Troubleshooting How to Use This Manual SafetySafety Symbols Used in this Manual Wear Safety Glasses and Work Gloves General Responsibility ResponsibilityRemember Operator ResponsibilityReporting a Safety Defect Maintenance ResponsibilityMechanical Features Standard FeaturesFunctional Description Models Covered in This ManualController Features Electrical FeaturesOptions Accessories Safety Circuit Standards Safety Devices and InterlocksFail Safe Operation Safety Device Lock-Outs Supply System Installation InstallationUncrating the Equipment Rigging and Placing the Additive FeederElectrical Connections Main Power ConnectionControl Relay Connection Determining the Desired Feed Rate Setup Procedures110 100 Procedure Calibration ProcedureEquipment Needed Observed Feed Rates ExamplesPre-Startup Checks Initial Start-upStarting Up the Additive Feeder Shutting Down the Additive FeederIndicator Lights SwitchesOperation Start-upUsed as a Cycle Override Safety Timer Timer ModuleCounter Module Elapsed Time Module Dual Setpoint Control Operation 2 Component Applications Regrind Feeder with Proximity SwitchSet Point #2 Motor Control Bottom Low Level Extruder Tracking Control Extruder Tracking Installation and SetupExtruder Tracking Equation Field Control Programming Desired Display SettingEquation Motor RPM = 25.2 X Auger RPMViewing or Changing the Constant Programming ModeProgramming for Follower Operation Viewing or Changing the Program Maximum Setting Viewing or Changing the Program Minimum SettingExiting Programming Mode and Returning to Run Mode Program Minimum SettingShutting Down the Additive Feeder Additive Feeder Control Factory DefaultsPreventative Maintenance Schedule MaintenancePhotocopy this page for your maintenance records Material Cleanout/Changeover Preventative MaintenanceAuger Assembly Changeover Corrective MaintenanceRemoving Auger Assembly Installing Auger AssemblyReplacement Motor Brush Part Numbers Motor Brush ReplacementProblem Possible cause Corrective action TroubleshootingIntroduction Additive Feeders Troubleshooting Appendix WarrantyOptional Components Annex B Information Technical SpecificationsAdditive Feeder Specifications and Overall Dimensions Drawings and DiagramsTypical Additive Feeder Controllers SET Point Exploded Assembly Drawing Parts List Spare Parts ListA0541292 Auger Assembly, 1/2 One Component Control Enclosure Parts Identification Two Component Control Enclosure Parts Identification Warranty Returns Safety Tag InformationAdditive Feeder Safety Tags Returned Material PolicyTechnical Assistance Additive Feeder Identification Serial Number TagPhotocopy this page for your records Worksheet for Charting Feed Rates