Lenze MC3000 Series - Manual (Page 21)

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7 .1 INSTALLATION AFTER A LONG PERIOD OF STORAGE
WARNING!
Severe damage to the drive can result if it is operated after a long
period of storage or inactivity without reforming the DC bus capacitors!
If input power has not been applied to the drive for a period of time exceeding three
years (due to storage, etc), the electrolytic DC bus capacitors within the drive can change
internally, resulting in excessive leakage current . This can result in premature failure of
the capacitors if the drive is operated after such a long period of inactivity or storage .
In order to reform the capacitors and prepare the drive for operation after a long period
of inactivity, apply input power to the drive for 8 hours prior to actually operating the
drive/motor system .
7 .2 EXPLOSION PROOF APPLICATIONS
Explosion proof motors that are not rated for inverter use lose their certification when
used for variable speed . Due to the many areas of liability that may be encountered when
dealing with these applications, the following statement of policy applies:
"Lenze AC Tech Corporation inverter products are sold with no warranty of fitness for a
particular purpose or warranty of suitability for use with explosion proof motors . Lenze
AC Tech Corporation accepts no responsibility for any direct, incidental or consequential
loss, cost, or damage that may arise through the use of its AC inverter products in these
applications . The purchaser expressly agrees to assume all risk of any loss, cost, or
damage that may arise from such application ."