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Troubleshooting
Hazardous voltage. Can shock, burn, or
Troubleshooting
kill. Disconnect power before attempting any service or
repair work on pump.
Symptom
Possible Cause(s)
Motor protector tripped.
Open circuit breaker or blown fuse.
Impeller clogged or binding.
Power cable damaged.
Motor not running
Bad control panel.
Defective liquid level switch.
Not enough liquid in wet well to activate
controls.
Liquid level cords tangled
Automatic controls defective
Liquid level control cords tangled
Pump is airlocked.
Pump runs continuously
Flow in matches or exceeds the pump's
capacity.
Check valve plugged, stuck shut, or
installed backwards.
System head excessive.
Pump suction plugged.
Wrong voltage or not wired correctly.
Little or no effluent
delivered from pump
Pump is air locked.
Worn or damaged impeller.
Liquid level controls incorrectly installed
or defective.
No discharge check valve installed.
Discharge check valve stuck open.
Sewage wetwell too small.
Pump cycles constantly
Liquid level controls incorrectly installed
or defective.
Pump too small for inlet flow.
Hazardous impellers and unexpected starts
which can cause loss of fingers. Keep hands away from
pump suction inlet when working on or servicing pump.
Corrective Action
Allow motor to cool. Make sure pump is completely submerged. Clear debris from volute
and impeller. Check for high amp draw.
Replace fuse or reset breaker. If circuit breaker opens repeatedly, don't reset it - call a
licensed electrician.
Check amp draw. If it is more than twice the nameplate amps, the impeller is locked.
Bearings and shaft may be damaged. DISCONNECT POWER, clear debris from volute,
impeller, and cutter as needed.
Resistance between power cable and ground should be infinity. If any reading is less than
infinity, call a licensed electrician.
Inspect control panel wiring. Call a licensed electrician.
With switch disconnected from power, check continuity through switch while activating
liquid level switch. Replace switch if necessary.
Allow the liquid to rise several inches above the switch-on level.
Untangle cords for free operation.
Try running pump in manual mode. If it runs, the automatic control is at fault.
Untangle cords for free operation.
Stop pump for about one minute, then restart. Repeat stopping and starting until the
airlock clears. If the airlock persists, DISCONNECT POWER, pull the pump and drill a
1/8" hole in the discharge pipe between the pump discharge and the check valve.
A larger pump or more pumps may be needed.
Make sure check valve is installed correctly (flow arrow should point away from pump)
and functioning correctly.
Consult dealer.
DISCONNECT POWER, pull pump, inspect, and clear as needed.
Check pump's rotation; check nameplate voltage against supply voltage (they must
match); consult a licensed electrician.
Stop pump for about one minute, then restart. Repeat stopping and starting until the
airlock clears. If the airlock persists, DISCONNECT POWER, pull the pump and drill a
1/8" hole in the discharge pipe between the pump discharge and the check valve.
DISCONNECT POWER, pull pump and inspect impeller. Replace if necessary.
Reposition or replace as necessary.
Install discharge check valve.
Repair or replace check valve as necessary.
Consult dealer.
Reposition or replace as necessary.
Consult dealer about larger pump or second pump.
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