Sterling 882.00274.00 Troubleshooting, Introduction, Problem Possible cause Corrective action

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
	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.

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