CONDITION
PROBABLE CAUSE
7.
Discharge head may be too high. Check elevation. Maximum pump head at zero
flow is 70 feet.
8.
If above checks do not locate trouble, motor rotor may be loose on shaft which
allows motor to run but will not run impeller or only at low RPM.
Red light comes on at
This indicates some water has leaked past the lower seal and has entered the seal
control box.
chamber and made contact with the electrode probe. Pump must be removed from
basin within approximately two (2) weeks for replacement of lower seal. This
preventive repair will save the motor.
Overload trips at control box 1. Push in on red reset button to reset overload. If overload trips again
and alarm buzzer or flashing after short run, pump has some damage and must be removed from
red light comes on due to
basin for checking.
high water level in basin.
2. Trouble may be from clogged grinder causing motor to overload or
could be from a failed motor.
3. Trouble may be from faulty component in control box. Always check
the control box before removing the pump.
Yellow run light stays on
1. Indicates H-O-A switch may be in the hand position.
continuously.
2. Level control switch may have failed causing pump to continue to
operate when water is below lower float.
3. Grinder assembly may be partially clogged causing pump to operate at
a very reduced capacity.
4. Gate valve or check valve may be clogged causing low pump flow.
5. Pump may be air logged.
Circuit breaker trips. 1. Reset breaker by pushing clear down on handle then back to on
position. If breaker trips again in a few seconds, it indicates excessive
load which is probably caused by a short in the motor or control box. Check out
instructions given with control box before pulling pump.
2. If this condition happens after an electrical storm motor or control box
may be damaged by lightning.
3. Resistance reading of the motor with lead wires disconnect from the
control box can determine if trouble is in motor or control box.
Pump is noisy and pump
1. Grinder assembly may be partially clogged with some foreign objects
rate is low.
causing noise and overload on the motor.
2. Grinder impeller may be rubbing on grinder ring due to a bent shaft or
misalignment.
Grease and solids have
1. Pump “ON” switch may be set too high.
accumulated around pump
2. Run pump on hand operation for several minutes with a small amount
and will not pump out of
of water running into basin to clean out solids and grease. This allows
basin.
pump to break suction and surge which will break up the solids.
3. Trash and grease may have accumulated around lower weight causing
pump to turn off too soon. Clean trash from weight and suspension
cable.
REPLACING GRINDER IMPELLER AND GRINDER SHREDDING RING
STANDARD TOOLS REQUIRED:
1.
Allen head socket set.
2.
Standard socket wrench set.
3.
Set of open end wrenches.
4.
Plastic hammer.
5.
Vise Grip pliers.
