WIL-10060-E-03
Wilden
®
15
Suggested Installation, Operation, Maintenance and Troubleshooting
Troubleshooting
Pump will not run.
1.
Check for pressurized air at the inlet.
2.
Check air inlet and filter for debris.
3.
Connect a test lamp to the two wires which run to
pump and ensure that the lamp cycles on and off.
4.
Make sure that the air valve manual override (small
red knob on front of valve) is switched to the “0”
position.
5.
Check pilot pressure vent at the top of the
operator/coil assembly to ensure that it is not
clogged.
6.
Check for a worn out air valve. If air continually blows
out the exhaust in very large quantities, the air valve
seals may be worn beyond their ability to function. In
this case, the valve must be replaced.
7.
NOTE: Before the valve is scrapped, it is possible
that it may be saved by completely disassembling the
valve, cleaning all components and relubricating the
valve.
Pump runs but little or no fluid comes out.
1.
Check that the discharge isolation valve is not closed.
2.
Check that the electronic signal is slow enough that
the pump is able to complete each physical stroke
before it is signaled to change direction. The time
required to complete the stroke is determined by a
variety of factors which include fluid viscosity and
head pressure.
3.
Check for pump cavitation; slow pump speed down to
match the thickness of the material being pumped.
4.
Check for sticking ball check valves. If the material
being pumped is not compatible with the pump
elastomers, swelling may occur. Replace ball check
valves and O-ring with the proper elastomers.
5.
Check to make sure that all suction connections are
air tight, and that the clamp bands are properly
tightened.
Pump air passages blocked with ice.
Check for excessive moisture in compressed air line. As the air expands
out the exhaust during the operation of the pump, water vapor entrapped in
the compressed air can freeze and block the air passageways in the pump.
If this occurs, it may be necessary to install a coalescing filter, an air dryer,
or a hot air generator for the compressed air.
Air bubbles in pump discharge.
1.
Check for diaphragm rupture.
2.
Check tightness of piston plates to shaft.
Product comes out of the air exhaust.
1.
Check for diaphragm rupture.
2.
Check tightness of piston plates to shaft.
Pump rattles.
1.
Create false discharge head or suction lift.
Solenoid buzzes or solenoid burnout.
1.
Incorrect voltage, faulty or dirty solenoid.
Solenoid valve fails to shift electrically but shifts with
manual override.
1.
Incorrect voltage, defective coil or wiring.
Solenoid valve fails to shift electrically or with manual
override.
1.
Inadequate air supply, contamination, inadequate or improper
lubrication, mechanical binding in the valve.
Valve shifts but fails to return.
1.
Broken spring, mechanical binding.
Excessive leaking from air valve vent.
1.
Worn seals in air valve.
