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Troubleshooting
Troubleshooting
Troubleshooting
• Follow the
Pressure Relief Procedure, page 9
before checking or servicing the equipment.
Problem
Problem
Problem
Pump cycles at stall or fails
to hold pressure at stall.
Pump will not cycle, or
cycles once and stops.
Reduced Pump
Performance
Air bubbles in fluid.
Leak in inlet or outlet sanitary
fitting.
Manifolds do not fit for
installation onto fluid covers.
812.0065
,
Cause
Cause
Cause
Worn checks or seats.
Air valve is stuck or dirty.
Check ball is severely worn and wedged
in seat or manifold.
Check valve ball is severely wedged into
seat due to overpressurization.
Clogged dispensing valve.
Leak detector has activated a shut-
down solenoid.
Clogged suction line.
Sticky or leaking check balls or flap
valves.
Flap valves installed upside-down.
Ruptured diaphragm.
Restricted exhaust.
Loose suction line.
Ruptured diaphragm.
Loose inlet manifold, damaged seal
between manifold and fluid cover,
damaged gaskets.
Loose sanitary clamp.
Damaged or worn gasket.
Misalignment of inlet/outlet fluid lines or
pipe.
Use of incorrect air cover gaskets results
in misalignment.
• Check all possible problems and causes before
disassembly.
Solution
Solution
Solution
Replace.
Disassemble and clean air valve. Use
filtered air.
Replace ball and seat component.
Follow
Pressure Relief Procedure, page 9
Disassemble ball check assembly and
inspect for damage.
Follow
Pressure Relief Procedure, page 9
Clear valve.
Investigate failure and reset leak
detector.
Inspect; clear.
Clean or replace.
Install the flapper valve with the text side
facing the seat.
Replace. See standard or overmolded
diaphragm repair procedure.
Remove restriction.
Tighten.
Replace. See standard or overmolded
diaphragm repair procedure.
Tighten manifold clamps or replace
gaskets or seating components .
Tighten clamp.
Replace gasket.
Use flexible fluid lines at pump inlet and
outlet.
Install correct air cover gaskets for the
type of diaphragms in use. See Parts list
for correct gasket.
Troubleshooting
.
.
7
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