Rockwell Automation 6012DB PowerFlex Medium Voltage Variable Frequency Drive - Manual (Page 81)

Rockwell Automation Publication 6000-UM001B-EN-P - October 2014 81
Preventative Maintenance and Component Replacement Chapter 5
Isolation Transformer
Cabinet
Replace/Clean Door Mounted Air Filters
Periodically remove and clean, or remove and replace, the air filters according to
the Preventative Maintenance table on
page 124 . The frequency with which you
renew the filters depends on the cleanliness of the available cooling air.
The cabinet door filters are installed in six locations, including four locations on
the Power Module Cabinet, and two locations on the Isolation Transformer
Cabinet. However, the method to remove or clean the air filters is the same. The
screens may be replaced while the drive is operating, but the procedure is easier to
perform while the drive is shut down.
If the drive is running, you must replace the filter as soon as possible to prevent
foreign material from entering into the drive.
Recommended Cleaning Method of Filters:
• Vacuum Cleaner – A vacuum cleaner on the inlet side of the filter will
remove accumulated dust and dirt.
• Blow with Compressed Air – point compressed air nozzle in opposite
direction of operating air flow (Blow from exhaust side toward intake side)
• Cold Water Rinse – Under normal conditions the foam media used in the
filters, require no oily adhesives. Collected dirt is washed away quickly and
easily using just a standard hose nozzle with plain water.
• Immersion in Warm Soapy Water – Where stubborn air-borne dirt is
present, the filter may be dipped in a solution of warm water and mild
detergent. Rinse in clear clean water, let stand until completely dry and free
of moisture.
Replace/Clean Door Mounted Air Filters 81
Inspect Top Mounted Main Cooling Fans 82
Replace Top Mounted Main Cooling Fans 83
Fan Balance 84
Inspect Isolation Transformer Auxiliary Cooling Fans 85
Replace Isolation Transformer Auxiliary Cooling Fans 86
Inspect Isolation Transformer 86
Inspect Voltage Sensing Board 87
Replace Voltage Sensing Board 87
Inspect Door Position Limit Switch 88
Replace Door Position Limit Switch 89
ATTENTION: The filter must be completely dry before reinstalling.