Rockwell Automation MV SMC Flex Motor Controller (for Series K or later) - Manual (Page 157)

Rockwell Automation Publication 1560E-UM051F-EN-P - June 2013 147
Maintenance Chapter 10
Solid-State Devices
Solid-state devices require little more than a periodic visual inspection. Printed
circuit boards should be inspected to determine whether all cables are properly
seated in their connectors. Board locking tabs should also be in place. Necessary
replacements should be made only at the PC board or plug-in component level.
Solvents should not be used on printed circuit boards. Where blowers are used,
air filters, if supplied, should be cleaned or changed periodically depending on
the specific environmental conditions encountered. For additional information
see NEMA Standards Publication No. ICS 1.1 - 1987 entitled “Safety Guidelines
for the Application, Installation and Maintenance of Solid-State Control”.
Static-Sensitive Items
While performing maintenance on the MV SMC, special precautions must be
observed in handling or touching certain static-sensitive components in the
cabinet. Most circuit cards and SCRs can be damaged by Electro-Static
Discharge (ESD). If personnel will make contact with an ESD-sensitive
component during maintenance, they must be grounded. Grounding should be
accomplished with a wrist strap which is connected to an approved ground.
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.
ATTENTION: Use of other than factory recommended test equipment for solid-
state controls may result in damage to the control or test equipment, or
unintended actuation of the controlled equipment.