88 Rockwell Automation Publication 6000-UM002E-EN-P - April 2018
Chapter 5 Preventative Maintenance and Component Replacement
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 6000 medium voltage drives require a continuous, smooth airflow to
cool the power components and the main heating device to ensure the stable and
reliable operation of the equipment. Obstruction of the air filters is the main
cause of poor cooling airflow.
The PowerFlex 6000 drive uses a number of cooling fans installed at the top of
the cabinet to ensure that sufficient air flow is used to cool the power components
and other heating equipment. When the equipment is running for some time, the
air filters accumulates 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
(1)
:
• Transformer overtemperature alarm / trip
• Power unit 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.
Regular Maintenance Intervals
The annual maintenance requirements are summarized on page 135 as a
guideline. Detailed procedures referred to in the Preventative Maintenance
Schedule are described beginning on page 92.
(1) Obstruction of the air filters is not the only cause of over temperature alarm and trip.
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