ST1/ST1F SUBMERSIBLE PUMP • OPERATION AND PARTS MANUAL — REV. #0 (02/01/21) — PAGE 15
TROUBLESHOOTING
Troubleshooting (Pump)
Symptom
Possible Problem
Solution
Pump Fails To Start
Incorrect voltage/amps?
Check that proper voltage (115VAC, single-
phase) is being supplied to the pump. Also
check that there is an adequate amount of
current (amps) to run the pump. Check power
source circuit.
Bad electrical connections?
Inspect power cord.
Blown power fuse or tripped circuit
breaker?
Check circuit breaker. Replace fuse.
Impeller locked?
Disconnect pump from power source and check
for clogging. Unclog pump impeller and inlet.
Thermal Overload Activated?
Disconnect pump from power source, let the
motor cool for at least one hour, ensure that
proper electricity is being delivered to the
pump. Check the length and gauge of extension
cord(s) if used.
Pump Fails to Deliver
Adequate Performance
Application Challenges?
Check to ensure that the application (Rise/
Run) does not exceed the pumps performance
capability.
Discharge Hose Issue(s)?
Ensure the hose does not exhibit any excessive
bends, kinks or twisting. Ensure the hose is not
clogged.
Clogged Strainer or Impeller?
Clean the strainer and check impeller for
clogging debris. Ensure the integrity of the
vanes of the impeller, and replace the impeller
as required.
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