Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C-Frame) - ForGe Control - Manual (Page 405)

Rockwell Automation Publication 7000L-UM301D-EN-P - June 2014 405
Component Definition and Maintenance Chapter 5
• Changing or Cleaning the Mesh Filters – The DI Cartridge require clean
DI water/Glycol solution to prevent damage. There are two Mesh filters,
one before and one after the DI Cartridge. These should be changed or
cleaned whenever they become dirty or the DI Cartridge is changed. The
loose particles on the outside Mesh Filter can be removed by opening the
tap on the bottom of the clear plastic container. The loose particle and the
liquid should be collected in a small container and then discarded. The
filter can then be removed and cleaned or changed. When the Mesh Filters
are cleaned/changed, they should be thoroughly checked for damage
before they are re-installed.
• Maintenance of the Water pumps – The two water pumps should be
greased and checked for leaks whenever preventive maintenance is
scheduled or every 3 months which ever comes first.
• Check Coolant Levels in the reservoir – The level of coolant should be
measured or marked on the side reservoir. Masking tape placed vertically
on the side of the reservoir can be marked with a pen or pencils for future
level references.
The coolant level will go down due to evaporation. Significant change in
coolant levels could be sign of leak in the drive or heat exchanger and
should be checked thoroughly.
Percentage of Glycol in coolant should also be checked periodically. Since
Water will evaporate faster than Glycol, the percentage could change as the
liquid evaporates. The heat transfer quality changes as the percentages
changes. A correct Glycol content should be maintained to balance the
heat transfer quality and freezing point of the liquid.
• Maintenance of the heat exchanger – The liquid to air exchangers have
fans, chiller fins and tubing. They should be checked for debris and
cleaned periodically. Make sure all inspection opening cover plates are re
installed after inspection.
Annual Maintenance As the name implies, these maintenance tasks should be performed on an annual
basis. These are recommended tasks, and depending on the installation
conditions and operating conditions, you may find that the interval can be
lengthened. For example, we do not expect that torqued power connections will
require tightening every year. Due to the critical nature of the applications run on
MV drives, the key word is preventive. Investing approximately 8.0 hours per year
on these tasks is time well spent in adding insurance against unexpected
downtime.
Initial Information Gathering
Some of the important information to be recorded includes:
• Print Drive Setup
• Print Fault/Warning Queues
• Save Parameters to NVRAM