The detection method for the quality of the controller: 1. Power outage detection (using diode level) 1. Check whether the positive and negative poles of the controller power input are short circuited. 2. Test the winding wire parameters of the controller: Connect the black probe to the positive pole of the power supply, and use the red probe to contact the yellow, green, and blue winding resistance wires, with parameters between 400 and 700. 3. Hall signal line detection: Connect the black lead to the black lead and the red lead to the red, yellow, green, and blue wires, and there should be no short circuit fault. 2、 Power-on detection 1. Check if the input voltage of the controller power supply is above 36V (48V). 2. Check if the Hall signal line has a voltage of 5-7V. 3. Check if there is a 5V or higher power supply on the handle power supply. 4. Rotate the knob to check if the signal line changes between 0.8 and 4.2V
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