Sterlco SLS Series Light Duty Shredder - Manual (Page 38)

GRN4-600 Chapter 6: Troubleshooting 38 of 50
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 Possible Remedy
Machine blocks or switches itself
off
Too much feed material. • Reduce grinding material.
Knife condition.
• Check knives and re-sharpen
if needed.
Cutting gap.
• Check cutting gap and set
according to this manual.
Discharge blocked.
• Check if discharge conveyor
belt is running.
Current failure.
• Check limit switch for
defective contact.
• Check electrical connection.
• Tighten limit switch if needed.
Fuse too small.
• Fit larger fuse—only after
consulting customer
service.
Rotational direction of rotor.
• Check motor and reverse
polarity if necessary.
Rotor speed.
• Change rotor speed—only
after consulting customer
service.