Troubleshooting - Graco SaniForce 2150 Operation Manual

Troubleshooting

Troubleshooting Troubleshooting
• Follow the Pressure Relief Procedure, page
before checking or servicing the equipment.
Problem
Problem Problem
Pump cycles but will not
prime and/or pump.
The center section is
excessively hot.
Pump fails to hold fluid
pressure at stall.
NOTE: Flapper checks
NOTE: NOTE:
are not 100% fluid tight.
Pump will not cycle.
The motor is operating,
but the pump will not
cycle.
Pump flow rate is erratic.
Pump makes unusual
noises.
3A5133J
11,
Cause
Cause Cause
Pump is running too fast, causing
cavitation before prime.
Center section has no air pressure,
or air pressure is too low.
Check valve ball is severely worn or
wedged in seat or manifold.
The pump has insufficient suction
pressure.
Seat is severely worn.
Outlet or inlet is restricted.
Inlet fittings or manifolds are loose.
Manifold o-rings are damaged.
The drive shaft is broken.
Check valve balls, seats, or o-rings
are worn.
Manifold screws or fluid cover
screws are loose.
Diaphragm shaft bolt is loose
Motor or controller is wired
improperly.
The leak detector (if installed) has
tripped.
The jaw coupling between the
motor and gearbox is not connected
properly.
Suction line is clogged.
Checks are sticky or leaking.
Diaphragm (or backup) ruptured.
Pump is operating near or at stall
pressure.
• Check all possible problems and causes before
disassembly.
Solution
Solution Solution
Slow down the controller (VFD)
Apply air pressure to center section
per your application requirements.
Replace the ball and seat.
Increase the suction pressure. See
the Operation manual.
Replace the ball and seat.
Remove the restriction.
Tighten.
Replace o-rings.
Replace.
Replace.
Tighten.
Tighten.
Wire per manual.
Check diaphragm for rupture or
incorrect installation. Repair or
replace.
Check the connection.
Inspect; clear.
Clean or replace.
Replace.
Adjust air pressure or slow the pump
speed.
Troubleshooting
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