Vestil HPC-400 - Manual (Page 12)

01/08 HPC-400, 22-126-120, 0108
V ESTIL M FG . C O . 12
T ROUBLESHOOTING G UIDE -- HPC-400
Warning: Always secure the platen by blocking it up or lower it fully, and disconnect the power supply,
before opening the hydraulic system.
Consult the factory for problems at time of installation, or for any problems not addressed below.
Problem: Possible cause(s): Action:
Motor doesn’t run when “CYCLE
START” button is pressed.
Stop button is engaged.
Door switch is not engaged.
No output from the transformer’s
secondary winding, or the in-line
fuse is blown.
No supply voltage.
Bad connection in the control
circuit.
Open motor relay coil or motor
thermostat.
Verify that the button operator is
pulled completely outward. If so,
test its contact block with an
meter.
Verify that the door switch plunger
is pushed in far enough to close the
switch.
Test the fuse, and for 24VAC at the
secondary winding; replace
components if bad.
Test for line voltage at the motor
relay’s line terminals.
Test all components and wiring with
a meter.
Test with a meter; replace if bad.
(Motor thermostat can be
bypassed.)
Motor runs, but platen does not
lower.
If three-phase, wrong motor
rotation.
No pump output.
Fluid level is low.
Verify motor rotates CCW when
viewed from the shaft end.
Check for fluid flow by loosening the
hose fitting at the top end of the
cylinder to check for fluid flow.
The fluid level should be within 1½”
of the top of the reservoir when
the platen is fully raised.
Motor hums noticeably or is
otherwise noisy, but the platen
does not move downward, or
moves downward only slowly.
Supply voltage is too low.
Motor is “single-phasing” (three-
phase motors only).
Motor’s start capacitor or
centrifugal switch is open
(single-phase motors only).
Low fluid level in the reservoir.
Verify the supply voltage at the
motor relay’s load terminals while
the motor is on. If voltage drop is
10% or more, install a properly
sized dedicated supply circuit.
Verify that all phases are present.
Determine cause of loss of voltage
on one phase, and correct.
Test both components with a meter.
Loosen the hose fitting at the top
end of the cylinder to check for
fluid flow.
Crushing platen cycles up and down
a few inches rapidly when the
“CYCLE START” button is pressed
and held.
“Cylinder Raised” limit switch is
staying engaged when the platen
is fully raised.
Inspect for the cause of the hangup.
Verify that the limit switch’s arm
and the switch’s actuator bolt
both move freely.
Crushing platen lowers, but only
while the “CYCLE START” button
is pressed.
Operator is not holding the button
long enough.
The motor relay’s auxiliary contact
is dirty or is open.
Hold button down long enough for
the platen to drop a couple of
inches.
Test with a meter. If defective,
replace the relay.
Platen lowers, but won’t return to
the top.
The pressure switch setting is
higher than the system pressure.
Place a pressure gauge in the
hydraulic system to verify that
the pump is developing adequate
pressure (3,000 psi).
Pails are not crushing completely.
Platen returns to the top.
The pressure switch setting is too
low.
Crushing platen drifts downward
when the crusher is not being
used.
System check valve is leaking. Run the crushing platen down fully,
then remove, inspect, clean, and
replace the check valve (item #5).