1. Q:It is no noise when work only with throttle.
   

   But when you use pedal,the noise will be happened.

   A:Replace the Iron Gear

   
   

2. Q:Hall Sensor Fault(Error 08)

   A:Send back the motor to factory for repairing.It may be the problem of controller.

   
   

3. Q:It is no any error number in display,but throttle and PAS can not work

   https://youtu.be/eybIMtclZcc

   A:Check whether the hall connected well,if it is ok,but the problem is still mot solved,it may be the problem of controller.

   
   

4. Q:Communication Fault(Error 30)

   A:Cut off display,the connect again.If the problem is still not solved,it may be the problem of controller.