No water coming from my borewell

No water coming out when ampere meter shows 20A

I have a borewell dug till 300 feet. Suddenly last week, water stopped pumping out from the borewell. When I switched on the motor and when the ampere reading showed 15A, water was being pumped out. Now from last week when I switch on the motor the ampere reading is showing 20A volt meter is showing 220V constantly, and water is not being pumped out. I checked whether there is water in the borewell, by putting camera inside it, and saw there was sufficient water. What does this signify?