User Guide
6
TROUBLESHOOTING INFORMATION
PROBLEM PROBABLE CAUSES CORRECTIVE ACTIONS
Pump does not turn on.
Pump not plugged in. Plug in pump.
Circuit breaker shutoff or fuse removed.
Turn on circuit breaker or replace fuse. (Freezing water
may cause circuit breaker to trip, or fuse to blow.)
Accumulation of trash on float. Clean float.
Float switch obstruction. Check float path and provide clearance.
Defective switch. Have pump serviced.
Defective motor. Have pump serviced.
Thermal protector activated. Allow to cool down to room temperature.
Pump will not shut off.
Float switch obstruction. Check float path and provide clearance.
Pump is air locked.
Shut power off for approximately 1 minute, then restart.
Repeat several times to clear air from pump. If system includes
a check valve, a 3/16" hole should be drilled in discharge
pipe approximately 2" above discharge connections.
Liquid inflow matches pump capacity. Larger pump reqired.
Defective switch. Have pump serviced.
Loose connection in level control wiring. Check control wiring.
Pump runs but does not
discharge liquid.
Check valve installed backwards.
Check flow indicating arrow on check valve body to ensure
it is installed properly.
Check valve stuck or plugged. Remove check valve and inspect for proper operation.
Lift too high for pump. Check rating table.
Inlet to impeller plugged. Pull pump and clean.
Pump is air locked. (See corrective action above.)
Pump does not deliver
rated capacity.
Lift too high for pump. Check rated pump performance.
Low voltage, speed to slow.
Check for proper supply voltage to make certain it corre-
sponds to nameplate voltage.
Impeller or discharge pipe is clogged. Pull pump and clean. Check pipe for scale or corrosion.
Impeller wear due to abrasives. Replace worn impeller.
Pump cycles continually.
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.