Hi,
I got one error while connecting a BP-250 , UNKNOWN ERROR 4021,
i tried all the way to connect it, by restarting,reinstalling the bms ,STILL I COULD NOT.
I THERE ANY OTHER OPTION??

,OTR THAN COLD BOOT!!
WHAT DOES IT MEAN BY ERROR 4021 OR 4020 ????
BEST REGARDS
ARH