13
MY983 (06-08-20)
TROUBLESHOOTING
SYMPTOM
CORRECTIVE ACTION
Pump won’t run.
Check all the wiring connections.
Check for a low or defective battery.
Check that the automatic switch is free to move up and down.
Press the circuit breaker reset button on the control panel.
Motor hums but pump won’t run.
Check for low or defective battery.
Pump runs but pumps very little or no water.
Make sure a check valve is installed and functioning between the primary pump
discharge and the Battery Backup wye.
Check for an obstruction in the discharge pipe.
The discharge pipe length and/or height exceeds the capacity of the pump.
Check for a low or defective battery.
The Positive (+) and negative (–) pump wires are reversed. Disconnect them and
reconnect correctly.
Pump cycles too frequently.
The check valve located between the discharge of the primary pump and the
Battery Backup wye is not installed or is not working properly. Install an auxiliary
check valve or replace the existing check valve as required.
TROUBLESHOOTING - PRIMARY PUMP
SYMPTOM
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
Pump won’t
start or run.
Pump is not plugged in.
Check and see if pump is plugged into a proper outlet.
Blown fuse.
If blown, replace with fuse of proper size.
Low line voltage
If voltage under recommended minimum, check size of wiring from main switch
on property. If OK, contact power company or hydro authority.
Defective motor.
Replace pump.
Defective float switch.
Replace float switch.
Impeller
If impeller won’t turn, remove lower pump body and locate source of binding.
Float obstructed
Remove obstruction.
Pump starts
and stops too
often.
Backflow of water from piping
Install or replace check-valve.
Faulty float switch
Replace float switch.
Pump won’t
shut off
Defective float switch
Replace float switch.
Restricted discharge (obstacle or ice in piping) Remove pump and clean pump and piping.
Float obstructed
Remove obstruction.
Restricted intake screen
Remove the pump and clean the intake screen and the impeller.
Pump operates
but delivers
little or no
water
Low line voltage
If voltage under recommended minimum, check size of wiring from main switch
on property. If OK, contact power company or hydro authority.
Something caught in impeller
Remove the pump and clean out the impeller.
Worn or defective parts or plugged impeller
Clean impeller if plugged; otherwise replace pump.
Check valve installed without vent hole.
Drill a 1/16” - 1/8” (1.6mm-3.2mm) dia. hole between pump discharge & check
valve (1-2” above where the discharge pipe screws into the pump discharge and
below the waterline).
Restricted intake screen
Remove the pump and clean out the intake screen.
Check valve is installed either backward or
upside down
Be sure check valve is installed correctly.
TROUBLESHOOTING - BACKUP PUMP
