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Always discount the pump from the electrical power source before handling. If the system fails
to operate properly, carefully read instructions and perform maintenance recommendations. If
operating problems persist, the following chart may be of assistance in identifying and correcting them.
Grinder Pumps
Model: AGP200 Series
Trouble Shooting
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
Pump runs but does
1. Pump impeller maybe air locked
1. Purge air
not pump liquid
2. If pump is three phase, rotation may
2. See instruction for checking
be backward
3. Vent hole clogged
3. Clean out the vent hole
4. Clogged inlet
4. Clean out the grinder inlet
5. Discharge gate valve may be closed
5. Open gate valve
6. Discharge check valve may be clogged
6. Remove and examine check
or have a broken clapper
valve for proper instalation and
freedom of operation
7. Discharge head may be too high
7. Check elevation
Red light comes on
1. This indicates some water has leaked
1. Change oil in seal chamber,
at control box
past the lower seal and has entered the
find and repair cause of leak
seal chamber and made contact with
the electrode probe
Overload trips at control
1. Grinder impeller may be clogged
1. Check grinder impeller for
box and alarm due to high
with foreign objects
freedom of operation, security
water level in basin
and condition. Clean impeller
cavity and inlet of any
obstruction
Circuit breaker trips
1. Excessive load possibly caused by a
1. Check pump for short using
with control
short in the motor or control box.
ohm meter
2. If this condition happens after an
2. Reset breaker by pushing
electrical storm, motor or control box
completely down on handle
may be damaged by lightning
then back to ON position. If
breaker trips again in a few
seconds check motor for
lightning damage
WARNING
