20 Rockwell Automation Publication 6000-TG100A-EN-P - September 2020
Chapter 2 Preventative Maintenance and Component Replacement
Maintenance of Industrial
Control Equipment
Daily Inspection
Check the following items during normal operation of the drive:
• abnormal noise or vibration in the drive or motor
• abnormal temperature in the drive or motor
• ambient temperature in the control room above nominal
• accumulation of dust or particulate on control room floor or surfaces
• abnormal load current above nominal
Clean the Air Filters
PowerFlex 6000T drives require a continuous, smooth airflow to cool the
power components, and the isolation transformer to deliver stable and reliable
operation of the equipment. Obstruction of the air filters is the main cause of
poor cooling airflow.
The drive uses a number of cooling fans that are installed at the top of the
cabinet to deliver sufficient airflow to cool the power components and
isolation transformer. When the equipment is running for some time, the air
filters accumulate dust and obstructs the airflow. Failure to clean the air filters
regularly may result in insufficient cooling airflow, which may cause some
parts of the drive to send an overtemperature alarm or even trip
(a)
:
• Transformer overtemperature alarm / trip
• Power cell overtemperature trip
Immediately after receiving the overtemperature warning, you should plan to
replace or clean the air filters. At this point there should be a few days or weeks
before the air filters fail, but this depends on the amount of dust in the
environment.
ATTENTION: Performing service on energized Industrial Control Equipment
can be hazardous. Severe injury or death can result from electrical shock,
bump, or unintended actuation of controlled equipment. Recommended
practice is to disconnect and lockout control equipment from power
sources, and release stored energy, if present. See National Fire Protection
Association Standard No. NFPA 70E, Part II and (as applicable) OSHA rules for
Control of Hazardous Energy Sources (lockout/tagout) and OSHA Electrical
Safety Related Work Practices for safety-related work practices. These
publications include procedural requirements for lockout/tagout, and
appropriate work practices, personnel qualifications, and required training
where it is not feasible to de-energize and lockout or tagout electric circuits
and equipment before working on or near exposed circuit parts.
(a) Obstruction of the air filters is not the only cause of over temperature alarm and trip.
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