MAINTENANCE
Troubleshooting
9
Cleaning the Impeller and Volute
Periodic cleaning of the pump parts will prolong the life and efficiency of the pump. After removing power
to the pump, disconnect the pump from the discharge plumbing.
1. Remove the screws that hold the base to the volute, then separate the base from the volute.
2. Remove the base and clean the impeller and the volute passage. Do not use strong solvents on the
impeller.
3. Be sure the impeller turns freely after cleaning.
4. Attach the base to the volute, making sure the seal is properly aligned.
Troubleshooting
Problem Probable Causes Corrective Action
Pump does not turn on
Pump not connected to electrical power. Connect pump to a dedicated circuit equipped with GFCI.
Circuit breaker off or fuse removed. Turn on circuit breaker or replace fuse.
Accumulation of trash or build-up on
float.
Clean float.
Float obstruction. Check float path and provide clearance.
Defective switch. Replace pump.
Defective motor. Replace pump.
Pump will not shut off
Float or float stem obstruction. Check float and float stem path and provide clearance.
Pump is air locked. Shut off power for approximately 1 minute, then restart.
Repeat several times to clear air from the pump.
Liquid inflow matches pump capacity. Larger pump required.
Defective switch. Replace pump.
Pump runs but does not
discharge liquid
Check valve installed backwards. Check flow indicating arrow on check valve body to
ensure proper installation.
Check valve stuck or plugged. Remove check valve and inspect for proper operation.
Lift too high for pump. Check rated pump performance.
Inlet to impeller plugged. Pull pump and clean.
Pump is air locked. Pull pump and clean.
Pump does not deliver
rated capacity
Lift too high for pump. Check rated pump performance.
Low voltage, speed too slow. Check that supply voltage matches the nameplate rating.
Impeller or discharge pipe is clogged. Pull pump and clean. Check pipe for scale or corrosion.
Impeller wear due to abrasives. Replace pump.
Pump cycles continuously
No check valve in long discharge pipe
allowing liquid to drain back into basin.
Install a check valve in discharge line.
Check valve leaking. Inspect check valve for correct operation.
Basin too small for inflow. Install larger basin.
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