Hello elektomaq, since it is a pump to raise water to a tank, I do not think they have put a high pressure pump that compresses the water and expels it as a fire hose, it may also be known in other countries as a compressor, I do not know, is that sometimes you forget that you talk to people from another country.
If your country is called that too, excuse me, something always turns on.
Then there is excessive consumption
It can be caused by mechanical or electrical problems, or as I mentioned the first gives way to the second
What needs to be done is to check the windings on the electric side and for the mechanical part all that transmission, internal parts of the compression head and some possible obstruction in the line
You can decouple the compressor from the discharge line and try it to see what happens
It also cleans the air filter
Try it out. If you compress try to change oil
Mechanically, maybe you can take it apart and clean it, but much more I don't think it's convenient. If it is damaged it is best to change it
The motor must start measuring consumption and measure windings, if you do not have the elements to do so, turn to an electromechanical workshop to measure it and tell you its real state