Some Viper 200's that i have sent out over the summer (2009) may have a incorrent brownout cpu setting then i programmed them.
The test is if the motor jumps if the 12V supply is disconnected or shut down. ( Its worse on a slow discharge then a sudden disconnect. ) It can potentially blow the Mosfets
I noticed this on the bench when i used a different 12 volt supply. When i turned off the 12V leaving the main on, then motor jumped. When i turned it back on one of the upper mosfets were blown.
If you have drives that do this, you may want to return them to be reprogrammed.
Sept 3 2009