Sterling AF-XXX Manuel D’Utilisation
Additive Feeders
Chapter 7: Troubleshooting
43 of 55
Chapter 7: Troubleshooting
7-1 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 troubleshooting must be accomplished
with the power off, line fuses removed, and with the machine tagged as out of service.
the machine and the electrical components. All normal troubleshooting 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.
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.
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.
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 is wired incorrectly to
the processing machine.
the processing machine.
Refer to the control enclosure
wiring diagram.
wiring diagram.
Control relay has failed.
Replace.
Motor control has failed.
Replace.
Motor brushes are worn.
Replace.
Controller is in the program
mode. Display reads PROG.
mode. Display reads PROG.
Reset DIP Switch 7.
Optional timer set incorrectly.
Reset timer.
Optional timer mode set
incorrectly.
incorrectly.
Set operation mode to H and
configuration to d.
configuration to d.
Feeder will not run with switch
in AUTO or MANUAL position.
in AUTO or MANUAL position.
Optional timer has failed.
Replace.