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
Q:Hall Sensor Fault(Error 08)
A:Send back the motor to factory for repairing.It may be the problem of controller.
Q:It is no any error number in display,but throttle and PAS can not work
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.