what light is flashing? on the charger? or on the bdi?
chances are there is a battery fault OR the battery voltage is too low and the charger is erroring out because of it.
the charger has to see a certain voltage before it will even try to charge, if the voltage is too low it will trigger a fault and make the LED flash a code.
Watch the flashing light and see if it pauses, count the number of flashes between the pause.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.