| Possible Cause |
Checking Procedures |
Corrective Action |
| A. |
Pressure switch. |
Check switch
for welded contacts. Check switch adjustments. |
Clean contacts,
replace switch, or adjust setting. |
| B. |
Low water level in well. |
Pump may exceed well capacity.
Shut off pump, wait for well to recover. Check static and drawdown
level from well head. |
Throttle pump output or
reset pump to lower level. Do not lower if sand may clog pump. |
| C. |
Leak in system. |
Check system for leaks. |
Replace damaged pipes
or repair leaks. |
| D. |
Worn pump. |
Symptoms of worn pump
are similar to those of drop pipe leak or low water level in
well. Reduce pressure switch setting, if pump shuts off worn
parts may be the fault. |
Pull pump and replace
worn parts. |
| E. |
Loose coupling or broken motor shaft. |
Check for loose coupling
or damaged shaft. |
Replace worn or damaged
parts. |
| F. |
Pump screen blocked. |
Check for clogged intake
screen. |
Clean screen and reset
pump depth. |
| G. |
Check valve stuck closed. |
Check operation of check
valve. |
Replace if defective. |
| H. |
Control box malfunction. |
See pages
44-54 for single-phase. |
Repair or replace. |
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