Troubleshooting - VERDER VERDERAIR VA-E50 Manual

Troubleshooting

Troubleshooting Troubleshooting
• Follow the Pressure Relief Procedure, page
before checking or servicing the equipment.
• Check all possible problems and causes before
disassembly.
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.
Pump will not cycle.
The motor is operating, but the
pump will not cycle.
Pump flow rate is erratic.
Pump makes unusual noises.
859.0765
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.
Check balls are sticky or leaking .
Diaphragm (or backup) ruptured.
Pump is operating near or at stall
pressure.
Troubleshooting
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.
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