Unwanted drilling pump trips

[prosper1963]

Hello, could someone refer me to this breakdown. I have a borehole with grundfos sp3A18 pump. It started unexpectedly. Apparently I changed the capacitor of the starter box which was tired, it triggered the thermal protection included in the starter box. The pump trips without a single drop of water being drawn. I checked installation: no leaks. Towards what to direct my troubleshooting, knowing that my pressure switch trips normally but that there is still a small pressure drop. Thank you in advance

[raymon]

probably more air in the balloon bladder.

[Gaston]

The lack of air produces closer triggers when drawing water, but not triggers in the absence of consumption.

If the pressure drops, there is a leak.

The most likely would be that the non-return valves are no longer completely sealed and that water returns to the borehole (which explains why we do not see the leak).

[Alain G]

Hello Prosper!

It can be sand in the non-return valve, it is necessary to empty the well completely by lasser running the water to extract a possible landslide from the walls of the well in order to clean the bottom, usually the pump should not be too close to the bottom to avoid this kind of problem.

Is it a recent well?

See you!

[jonule]

put an anti-sediment filter just before, it costs nothing.