Note that in one of the following situations, the pump should be stopped immediately.

1) The working current of the submersible pump is suddenly higher than the rated current of the motor.
2) Abnormal water output, intermittent water output. The sand content increases.
3) The insulation resistance of the motor is less than 0.5 megohm.
4) The submersible pump unit has obvious noise and vibration aggravated.
5) The grid voltage is insufficient. Less than 5% of the rated voltage.
6) One phase of the fuse is burned out.

7) Damaged water pipeline.