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TROUBLESHOOTING OVERVIEW
Fast and effective troubleshooting requires well-trained personnel supplied with the
necessary test instruments as well as a sufficient stock of recommended spare parts.
Capable electronic technicians who have received training in the control operation and
who are familiar with the application are well qualified to service this equipment.
Suggested Training
A. Study the system instruction manual and control drawings.
B. Obtain practical experience during the system installation and in future servicing.
C. Train in the use of test instruments.
Maintenance Records
lt is strongly recommended that the user keeps records of downtime, symptoms, results
of various checks, meter readings, etc. Such records will often help a service engineer
locate the problem in the minimum time, should such services be required.
General Troubleshooting
The most frequent causes of drive failure are:
A. Loose or broken wire connections.
B. Circuit grounding within the interconnections or the power wiring.
C. Mechanical failure at the motor.
DO NOT make adjustments or replace components before checking all wiring. Also
monitor all LED indicator lights before proceeding with troubleshooting checks, and
check for blown fuses.
lt should be noted that modern solid state electronic circuitry is highly reliable. Often
problems, which appear to be electrical, are actually mechanical. It is advised that the
motor be checked in the event of any drive problems. Refer to the motor owner’s
manual for maintenance and repair procedures.
Notes for a Troubleshooting Technician
A minimum knowledge of system operation is required, but it is necessary to be able to
read the system schematics and connection diagrams.
An oscilloscope may be needed to locate problem areas and to make adjustments.
However, the majority of problems can be solved by using a multimeter and by parts
substitution.
WHEN A TEST INSTRUMENT IS BEING USED, CARE MUST BE TAKEN TO INSURE THAT ITS
CHASSIS IS NOT GROUNDED EITHER BY A GROUNDING PLUG CONNECTION OR BY ITS
CASE BEING IN CONTACT WITH A GROUNDED SURFACE. EXTREME CARE MUST BE
TAKEN WHEN USING THE OSCILLOSCOPE SINCE ITS CHASSIS WILL BE ELECTRICALLY
HOT TO GROUND WHEN CONNECTED TO THE CONTROL SYSTEM.
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