It is good practice to monitor the conditions and performance of the Single Phase Openwell Submersible. Diagnosis
may be carried out by checking the following:
Closing the delivery valve for a few seconds only and check the shut-off head generated by the
pump. Do not run at shut-off conditions for a prolonged period of time as the water in the volute
casing will get hot
Checking the current drawn by the pump at the duty flow rate
Both these data should be compared to corresponding data recorded when the unit was initially
installed
Any reduction in shut-off head may indicate wear of the pump hydraulics
Any increase in motor current at duty flow rate indicates a possible overload condition
Measure the insulation resistance of the winding to check the condition of the motor
Open the filling plugs and check the level of water inside the motor. Top up, if required, with pure
drinking water
Check the level of silt at the bottom of the well and de-silt if necessary
Check the direction of rotation of the Openwell Submersible
Check all electrical connections are proper
OMOW002A 29 2020.01
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