Stainless steel multistage submersible pump common fault maintenance method
1. Difficult or unable to start
If the switch is turned on, the fuse will blow immediately or the motor will buzz without turning or not reach the rated speed. Both are startup failures. Generally there are electrical and mechanical reasons:
Electrical:

(1) Low voltage and insufficient starting torque of the motor. The main reason is that the voltage of the power supply system itself is low, the transformer capacity is not enough or too far from the pump, and it may also be that the cross-section of the power supply conductor is too small.

(2) One phase of the power supply is broken or the fuse of one phase is blown, causing the motor to start two phases.

(3) if the motor steering is wrong, any two of the three wires should be adjusted and connected.

Mechanical aspects:

(1) No pre-watering water or insufficient pre-watering water before starting, pre-watering water should be added.

(2) improper match between the drive shaft and the rubber bearing, and the clearance is too small.

(3) the bending of the drive shaft or the axial clearance of the blade wheel is not adjusted properly, resulting in friction or sticking, which should be repaired or adjusted.

(4) there is debris in the pump stuck impeller or sand in the pump body and bearing, should be removed in time.