S e c t i o n 5
T R o u b L E s H o o T i n g
thick products or high pumping volumes may require
you to increase the discharge pressure . the discharge
pressure will control the velocity of the product coming
out of the pump and should be adjusted according to the
desired product flow . the time value on the controller
is the interval that the pump is in the discharge mode .
A pump set to a short time interval will discharge small
amounts of product and cycle too quickly . A pump set
to a long time interval will force too much product out of
the tube and air lock the check valves . Please note that on
very fragile products like tenders or fillets, a longer stroke
is more advantageous because the check valves will come
in contact with fewer pieces of product .
• Please note that in certain applications the HPVC pump
may have to be primed to start the pump . Applications
that may require priming include breast, thigh meat,
tenders and other extremely thick products . the pump
can be primed by placing either your hand or other
object (i .e . plastic bag) over the exit end of the pipe
connected to the pump . Once the pump cycles twice
nothing else will be required .
trouble shooting guide
In the unlikely event that your pump is not performing,
please see the chart below for help with any problems
you might incur .
1. Problem
pump is not pulling when the plc indicates suction.
Cause
Outlet check valve may be lodged open with
1.
product causing the pump to suck air from piping .
suction regulator is set too low . (recommended:
1.
3 .8-5 bar (55-75 PsI) .
Low or no air pressure .
2.
Air valves not functioning properly .
3.
Dirty or defective vacuum generator .
4.
Loose connection on piping .
5.
Check valves misaligned .
6.
Solution
manually discharge the pump for 2 seconds to clear
1.
any blockage . If this does not help, disassemble
the pump and clear the check valves .
turn up suction regulator to 5 bar (75 PsI) .
2.
Check to ensure that the air supply is adequate
3.
Disassemble and clean vacuum generator, or
4.
replace unit
ensure that all tubing or plumbing connections,
5.
both inside the control panel and at the pump, are
seated properly and no air is leaking .
Align check valve(s) hinge at top of tee . (refer to
6.
sec, 1-2)
trouble shooting guide
2. Problem
pump is in suction mode and will not cycle to
discharge mode.
Cause
PLC failure
1.
Probe connection is bad .
2.
Outlet check valve lodged open .
3.
Probe set point is too high
4.
Solution
there are no user serviceable parts inside the PLC .
1.
replacement is recommended if it is found that the
PLC has failed
Inspect probe connections at both ends of wiring
2.
and repair if needed .
Purge pump .
3.
Calculate probe set point and adjust PLC
4.
trouble shooting guide
3. Problem
pump stays in discharge mode and will not cycle
back to suction mode.
Cause
Probe may have product build up that is interfering
1.
with normal operation .
Pump wiring problem .
2.
PLC failure
3.
Probe set point is too low
4.
Solution
remove sensor cap from pump and clean probe to
1.
remove any product build up .
Check all wiring, ensuring that there are no loose
2.
connections or corrosion
there are no user serviceable parts inside the PLC .
3.
replacement is recommended if it is found that the
PLC has failed
Calculate probe set point and adjust PLC
4.
S e c t i o n 6
A s s E M b L y
8
WILDEN PUMP & ENGINEERING CO., LLC
WIL-12120-E-01