No assist

Juliet C

New Member
Region
USA
I purchased the Bafang front hub motor kit & mini shark 48V 12.8Ah battery. I also purchased the LCD display C961 & eBrake cut off. My local bike shop installed it, and I've taken the bike back to them, but nobody seems to be able to solve the problem. I haven't actually ridden the bike that much since the install, but it stopped working after sitting in the garage for awhile. I could switch everything on but no peddle assist either through the pedals or through the lever on the handlebars. If I unplug all the connections on the bike (from the battery, at the hub, and on the central frame bar) then it usually starts working again. The bike shop owner seems to think it might be some kind of static charge build up? I did notice that when I plugged the battery into the charger I was seeing a spark between the charger and the battery, even when the charger was not plugged into the wall.

Has anyone else had a similar problem? Any advice on how to solve the issue? I'm not riding the bike because twice now it has quit on me when I was far from home . . .
 

Juliet C

New Member
Region
USA
Is that this part? I notice that the little red light here is sometimes on and sometimes off, even when the peddle assist is working. The screw here is not particularly tight so I can toggle the piece with the light back and forth.
 

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tomjasz

Well-Known Member
Yes. the red light should flash when the magnets in the wheel pass the sensor. SOME firmware will stop the motor if the PAS sensor and magnet are not functioning. Move the sensor to a position where the led doesn't flash. Will the motor run? No error codes on the display?
 

Juliet C

New Member
Region
USA
Thank you for the tip! That seems to have solved the problem. When the sensor is moved away, the pedal assist doesn't work. When it is closer, it works. No error code either way. I'm going to let it sit for a few days and see if it still runs as it seemed to not work after sitting for some period of time. Hope it was as simple as this though.