E-Tech VS series 8" submersible pumps - Manual (Page 12)

12
9 . TROUBLESHOOTING
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Zero flow rate
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Poor flow rate
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Poor pressure
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The pump starts and stops too frequently
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Excessive current absorbed by the electro-pump
Possible causes related to the pump
(Motor and panel excluded)
Solution
██ █ Well water level too low Wait until well water level is restored, or if
possible, lower the pump further
██ Suction screen clogged Pull out the assembly and clean it
██ Delivery valve closed or blocked Find and replace the defective valve
█ █ Pump silted up Pull out the assembly and clean it
██ █ Wrong direction of rotation Carry out instructions as in 4.2
█ █ Pump capacity exceeds well capacity Replace pump with one of lower capacity
█ Leaks in the system Locate leaks and repair them
█ Worn pump Pull out the assembly and overhaul it
█ Pressure switch or level control improperly set Adjust setting
█ Tank too small Replace tank with a larger one
█ Mechanical friction Pull out the pump and overhaul it