In daily operation, the electric hoist is damaged, the circuit is cut off, and cannot be contacted due to the internal main control circuit of the electrical equipment; Causing its inability to function properly.

　　So, how should we respond to this situation. Firstly, it is necessary to carefully check the main control circuit and cut off the power supply of the hoist motor; Prevent the main and control circuits from suddenly sending power to the three-phase motor to burn the motor, or the hoist motor from running with power. Next, pause the switch and jog to start, carefully inspect and analyze the control appliances and circuit conditions inside. Repair and replace electrical appliances or circuits. Until it is ensured that there are no faults in the main and control circuits; To start. When it is found that the voltage at the end of the hoist motor is lower than 10% of the rated voltage, the goods cannot be started and cannot operate normally. At this point, it is necessary to use a multimeter for pressure measurement.