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SECTION III – TROUBLESHOOTING
SYMPTOM
POSSIBLE CAUSES
SOLUTION
PUMP NOT OPERATING
No pneumatic power
Check that pneumatic power exists
and that all connections are sound.
Insufficient regulator
pressure for pump load
Check regulator setting and adjust
if needed.
Limit switches or may be out
of position
Verify correct limit switch position
(refer to installation manual).
Ensure that lower limit switch is
raised at least
1
/
8
inch above its
lowest position.
Exhaust regulator settings
may be too restricted
Unscrew the adjustment screw in
both the lifting and return exhaust
regulator to check for improved
operation.
PUMP WILL NOT OPERATE
AT FULL SPEED, OR STALLS
AFTER A FEW MINUTES OF
OPERATION
Blockage in discharge line
Remove discharge line and confirm
pump operation with no line
attached. To remedy locate
blockage in discharge line and
remove.
Discharge line is frozen
Heat tracing and insulation is
recommended in colder climates,
as well as keeping the pump
operational 24/7 to keep lines from
freezing.
Exhaust regulator settings
may be too restricted
Unscrew the adjustment screw in
both the lifting and return exhaust
regulator to check for improved
operation.
Insufficient regulator
pressure for pump load
Check regulator setting and adjust
if needed.
PUMP IS OPERATING, BUT
OUTPUT IS MINIMAL
PVC piston seals have worn
Pull pump, replace piston seals.
Crack or leak in drop
assembly, either fiberglass
drop shafts or PVC
Pull pump. Inspect drop assembly
for disconnections, cracks, over-
tightening.
Intake filter or lower pump
assembly clogged
Pull pump. Remove build up/clog.
Replace intake filter if necessary.
