Lenze TCF Series - Manual (Page 14)

6 .1 INSTALLATION AFTER A LONG PERIOD OF STORAGE
STOP!
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 motor .
6 .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 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 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."
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