Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C-Frame) - ForGe Control - Manual (Page 339)

Rockwell Automation Publication 7000L-UM301D-EN-P - June 2014 339
Component Definition and Maintenance Chapter 5
Figure 284 - Reservoir Circuit
Replacing the Mesh Filters
When the conductivity of the coolant approaches the alarm level of
1.0 microSiemen, a conductivity alarm and/or fault occurs. To correct the
problem, first clean the fine mesh filters (see
Figure 283 ) and put the purification
system back online. The filters should be checked periodically and replaced when
worn out. If the conductivity does not decrease after cleaning the filters, the de-
ionization cartridge should be replaced. Note that if the filters are clogged,
coolant conductivity will increase even if the de-ionization cartridge is still
functioning properly. The filters and the de-ionization cartridge can be changed
while the drive is running.
1. Close valves V8 and V9 (if provided) and unscrew the housing (see
Figure ).
2. Drain some of the coolant by loosening the drain at the base of the filter.
Some spillage may occur so a pail should be placed underneath.
3. The filter may be cleaned or replaced, however the de-ionizing cartridge
must be discarded and replaced with a new one.
Do not recycle the resin cartridge. It has been contaminated with
ethylene glycol.
Vent Button
Filter
V8
V9
Deionizing Cartridge