42d4f178_s__electric_submersible_pumps___Check
[Sr.No.] 1 [Possible Cause] Pump may be air locked [Corrective Action] If this test fails to correct the trouble, proceed with the steps that follow. [Check] 
Stop and start the pump several times, waiting about one minute between cycles. If the pump then resumes normal delivery, air lock was the trouble.
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