Vestil HBD series - Manual (Page 13)

13
1.) Power unit doesn't run when "UP"
button is pressed.
2.) Motor runs properly, chute doesn't
move. Motor and pump not noisy.
3.) Motor or control enclosure hums,
chatters, or buzzes, or some type or
squeal can be heard; the chute does
not move, or the chute moves only
slowly.
4.) Chute raises, then drifts down.
5.) Chute lowers too quickly.
6.) Chute lowers too slowly.
7.) Chute won't lower.
8.) Spongy or jerky chute motion.
a. Transformer fuse is blown.
b. No supply voltage.
c. Upper-travel limit switch is engaged or bad.
d. Bad connection in control circuit.
e. Bad control transformer.
f. Open motor relay coil.
g. Battery voltage low (DC units)
a. Motor rotation is wrong.
b. Pump has failed.
c. Fluid level is low.
a. See (2b), for when chute doesn't raise.
b. Excess voltage drop to motor, due to power
wire size too small, wire run too long, or
incoming voltage too low.
c. Motor is "single-phasing".
d. Pressure relief opening at full pressure.
e. Contamination holding open the lowering valve
or the check valve.
a. See section (3)
a. See section (3)
b. Flow control spool is stuck.
a. Flow control spool is stuck.
b. Pinched hose.
c. Velocity fuse locking (chute only slowly
creeps down).
a. Velocity fuse locking.
b. Control transformer fuse blown.
c. No supply voltage.
d. Valve solenoid is bad.
e. Bad connection in control circuit.
f. Physical blockage of the structure.
g. Solenoid valve or suction hose screen
plugged.
a. Excessive air in the hydraulic cylinders.
TROUBLESHOOTING GUIDE - HBD
Before performing any task, always lower the chute fully to the floor and disconnect the power supply.
Consult factory for problems at time of installation, or for any problems not addressed below.
Problem Possible Cause(s) Action
a. Test with meter; replace if bad.
b. Test with meter. Check fuses, breakers,
and overloads to determine the cause.
c. Inspect and test switch. Replace if bad.
d. Test all parts of circuit with meter.
e. Check for 24 VAC; replace if bad.
f. Test with meter; replace if bad.
g. Test with meter. Charge battery if low (is
motor relay LED on?)
a. Verify motor shaft rotates CCW.
b. Consult factory for replacement.
c. Ensure reservoir is filled.
a. See section (2).
b. Check power installation for adequacy.
Check incoming voltage while motor is
running. Correct problem if found.
c. Determine cause of loss of voltage on one
phase; correct.
d. Check for structural damage or binding of
the scissor legs, etc. Check for chute
overload condition.
e. Remove and inspect. Clean per
instructions in this manual.
a. See section (3).
a. See section (3).
b. See below.
a. Remove plug from FC port; push on flow
spool to ensure it is fully pressed into the
cavity.
b. Check pressure, supply, and return hose
for kinks.
c. Same as for jerky chute motion.
a. Same as for jerky chute motion.
b. Test with meter; replace if bad.
c. Test with meter. Check for cause of power
loss.
d. Check with multimeter on diedecheck
function. (Reading for ohms will not provide
an accurate test of the coil.)
e. Test all parts of circuit with meter.
f. Inspect for foreign material or objects that
might block the leg set of its rollers.
g. Remove and inspect. Clean per
instructions in this manual.
a. Bleed all per procedure described in this
manual.