Rockwell Automation Publication 1560F-UM001A-EN-P - June 2019 195
Maintenance Chapter 10
Overload Maintenance After a Fault Condition
See NEMA Standards Publication No. ICS 2 Appendix A entitled “Maintenance
of Motor controllers after a fault condition”.
Final Check Out
After maintenance or repair of industrial controls, always test the control system
for proper functioning under controlled conditions that avoid hazards in the
event of a control malfunction.
Keep Good Maintenance Records
This rule will be most helpful in locating possible intermittent problems by
pointing to a particular area of recurring trouble within the overall system.
Furthermore, good maintenance records will help reduce major, costly shutdowns
by demanding the use of proper test equipment and an appropriate inventory of
spare parts. For additional information see NFPA 70B, “RECOMMENDED
PRACTICE FOR ELECTRICAL EQUIPMENT MAINTENANCE”,
published by the National Fire Protection Association.
Power Components
Power components should be kept clean and free of dirt and obstructions. This
will avoid tracking and heat buildup, thereby increasing the life of the device.
Control Components – Electronic
The printed circuit boards are to be kept clean and free of any accumulations of
dirt and foreign materials.
Materials which create static electricity should never be allowed near circuit
boards while in the unit, or in storage. Caution should be used when one is near
or handling circuit boards. There are no other requirements, other than
housekeeping standards, that the maintenance program requires on the logic
control components.
Interlocks
Verify that interlocks function as intended, and have not been forced, damaged or
removed.
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