I purchased a 29 inch 1500 watt rear hub motor kit before you sold the kit with sine wave controllers 5 years ago. I love your hub motor. It’s very fast and powerful. I think your hub motors are the best in the world. I have recommended your bike motor to many of my friends. I
am going to buy a new 29 inch bike motor kit.
I am writing because I get a hub motor or controller short circuit fault message on the display when I use the walking feature. I hear a thumping noise when I use the throttle, but the motor doesn’t spin. Does this mean the problem is with my controller or with my motor?
Usually, this phenomenon may be caused by the following situations.
1. Caused by a short circuit between the positive and negative poles of the power supply. The positive pole of the power supply is connected to the negative pole, and the negative pole of the power supply is connected to the positive pole.
2. The voltage of the battery is too high, exceeding the maximum value of the controller capacitor, causing instantaneous breakdown of the capacitor.
Of course, it is also possible that the circuit board of the controller was not cleaned thoroughly, and the solder beads caused short circuits between electronic components.
The issue comes from hub motor controller.
If possible,open this controller and check if the capacitor has been burned out. It’s easy to open this controller box. Only use a screw driver to take off 4 screw nuts per side. Then can take the PCB out of controller.
Can re-test it as below:
Connect hub motor controller ‘s red and black power wires together. Discharge the electricity from the capacitor. Then re-connect them to battery power wires.
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