I have an underground storage at my which is storing water recd from the pipeline of Municipal Corporation. I have installed electric motor for lifting water from the underground storage to overhead tank in my terrace. One morning I switched on the motor for lifting water and forgot to switch off the motor which kept on running for 3-4 hrs and the storage was empty long before. Suddenly I realized and switched off the motor. After few hours when i switched on the motor, it was running but water was not being lifted . What could be the problem ?