Method for performing priming of a submersible pump

A Method for monitoring and controlling an operation of a submersible pump, the pump being located in a reservoir containing a liquid, wherein the pump comprises an inlet, and outlet, a volute located between said inlet and said outlet, and an impeller located in said volute, the method being characterized by a step of performing a priming of the pump in response to a priming condition, wherein the priming comprises steps of:

• confirming that a liquid level in the reservoir is located at a same level or above an upper portion of the impeller,
• driving the impeller in a reverse direction of rotation in order to generate a flow of gas/liquid mixture from the volute out through the inlet of the pump, wherein a duration of the reverse operation of the impeller is equal to or more than 2 seconds and equal to or less than 5 seconds,
• stopping the impeller from rotating in the reverse direction of rotation,
• driving the impeller in a forward direction of rotation in order to generate a flow of liquid from the volute out through the outlet of the pump,
• detecting, during the forward operation of the impeller, whether too much gas is present in the volute preventing the impeller from generating an expected flow of liquid from the volute out through the outlet of the pump, and
• in response to detection of too much gas in the volute, stopping the impeller from rotating in the forward direction of rotation and returning to the step of driving the impeller in the reverse direction of rotation, and in response to non-detection of too much gas in the volute, exiting the priming of the pump.