Bafang bbs02 error

[chilli]

Hi there
Been using my e-bike for a while. Recently run into a problem where the battery and error symbol flash. The bike still works with both throttle and PAS but I can’t change any settings or anything.
Any help would be appreciated
Thanks
Luke

 

[amberwolf]

30H is comm error, meaning display can't talk to or hear back from the controller.

What specifically happened between the time it worked and the time this problem started? That may help point you to the source of the problem.