Troubleshooting 5
For parts or assistance, call Diamond Customer Service at
1-800-265-7241
SYMPTOM
PROBABLE CAUSE(S)
CORRECTIVE ACTION
Pump won’t start or run. 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 pump.
Float obstructed.
Remove obstruction.
Pump starts and stops
Backflow of water from piping.
Install or replace check-valve.
too often.
Faulty float switch.
Replace pump.
Pump won’t shut off.
Defective float switch.
Replace pump.
Restricted discharge
Remove pump and clean pump and piping.
(obstacle in piping).
Float obstructed.
Remove obstruction.
Pump operates but
Low line voltage.
If voltage under recommended minimum, check size of wiring from
delivers little or
main switch on property. If OK, contact power company or hydro
no water.
authority.
Something caught in impeller.
Replace pump.
Worn or defective parts or
Replace pump.
plugged impeller.
Check valve installed without
Drill a 1/16" - 1/8" (1.6mm - 3.2mm) dia. hole in the discharge pipe
vent hole.
between the pump discharge port & the check valve.
NOTICE:
These pumps have no serviceable parts inside case. Opening case will ruin pump. For obstructions or blockages
of the impeller replace the pump.
Hazardous voltage. Can shock, burn or kill
. Unplug pump before attempting to clean or work on pump.
