I recently had a 250 watt Suzhou Bafang which was in good working order rebuilt into a new rim. Now with everything reconnected when I work the throttle the motor makes a loud humming noise but does not drive the wheel. There is also a much quieter whirring noise inside the hub as though the motor was turning but not driving.
The motor is the Hall effect type: three thick wires, and five thin wires connected to the controller. I have checked all the connections and they seem to be in order, exactly as they were prior to the rebuild, and the same working controller is in use.
The thin wires which enter the motor spindle seem to be intact and probably have not been tugged out of place during the wheel rebuild.
Any suggestions as to what is wrong?
The motor is the Hall effect type: three thick wires, and five thin wires connected to the controller. I have checked all the connections and they seem to be in order, exactly as they were prior to the rebuild, and the same working controller is in use.
The thin wires which enter the motor spindle seem to be intact and probably have not been tugged out of place during the wheel rebuild.
Any suggestions as to what is wrong?
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