•  After installation, it ought to measure the insulation resistance from the control beginning end, and measure the conduction of the three-phase line circuit. After it is checked to be normal, press the button to start up the submersible pump, and observe whether the value on meter can meet the specified voltage and current on the nameplate, and listen to whether the abnormal phenomena such as noise and vibration occur when the pump rotates.

•  If the pump reverses, large current, small flow, the motor should shut up immediately; to exchange any two phases among the three phases, normal operation will be realized.

•  4 hours after operation for the first time, shut up the electric pump and measure the insulation resistance in thermal state immediately, when the resistance is not less than 0.38 megohms, continued operation can be available.

•  After stopping of the pump, the next start up should be 3-5 minutes after the stopping, so as to prevent the water hammer generating in ascending pipe from damaging the electric pump. It should be paid special attention that the electric pump can not be start up and shut up frequently.