1. The motor is not well lubricated. As a result, the motor cannot move after the fan blades are installed. Remove the fan blades, plug in the power, and the shaft can rotate.
2. The fan is overheated. Overheating of the motor will also cause the motor's load carrying capacity to deteriorate, and the motor's active power to become low, resulting in the inability to drive the load.
3. If the electric fan is used for a long time, the motor will wear out. After the motor sleeve is worn, it is easy to burn. If the motor is used for a long time, the internal resistance of the motor will also increase, and the load capacity will become lower, resulting in the inability to drive the fan blades to rotate.
4. The starting capacitor capacity becomes smaller. The parameters are written on the nameplate. Over time, the capacitance will decrease, resulting in a smaller starting torque of the motor and an inability to drive the load. Remove the capacitor and replace it with a new one, which should be 20% larger than the original one.