Vestil EHLTT-H-4848-2-47 handleiding
Handleiding
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TABLE OF CONTENTS Rev. 6/5/2024 EHLTD MANUAL
TABLE OF CONTENTS Copyright 2024 Vestil Manufacturing Co. Page 33 of 35
TROUBLESHOOTING GUIDE
Care should be taken to identify all potential hazards and comply with applicable safety
procedures before beginning work.
Remove any load and install the maintenance props before beginning any inspection or
service on the lift table. See below.
Only qualified individuals trained to understand mechanical devices, electrical and hydraulic circuits, and
the hazards associated with them, should attempt troubleshooting and repair of this equipment.
Consult the factory for any problems not addressed in this manual. ALWAYS have the product serial number
or model number on hand when calling the factory.
PROBLEM
POSSIBLE CAUSES
ACTION
Power unit doesn’t run
when “UP” button is
pressed.
Transformer fuse is blown.
Test with meter. Replace if bad.
No supply voltage.
Test with meter. Check fuses, breakers, and
overloads to determine the cause
Upper-travel limit switch is engaged or bad.
Inspect and test switch. Replace if bad.
Bad control transformer.
Check for 24 VAC at secondary. Replace if bad.
Bad motor relay coil.
Test with meter. Replace if bad.
Bad solenoid start switch (DC units).
The green LED on motor relay will be off, or will
turn off when the UP pushbutton is pressed.
Battery voltage low (DC units).
Test with meter. Charge battery if low (is the motor
relay LED on?)
Motor runs but
platform doesn’t
move. Power unit
not noisy.
Motor rotation is wrong (AC-powered units
only).
Verify the motor runs CW, opposite the shaft end.
Pump is failing to produce pressure.
Contact Technical Service.
Motor hums or pump
squeals, but the
platform does not
move, or the
platform moves only
slowly.
Pump is failing to produce pressure.
Contact Technical Service.
Excess voltage drop to motor, due to power
wire size too small, wire run too long, or
incoming voltage too low.
Check the power installation for adequacy.
Check the incoming voltage while the motor is
running. Correct any problems found.
Motor is “single-phasing”.
Determine and correct cause of voltage loss on
phase.
Pressure relief opening at full pressure.
Check for structural damage or binding of the
scissor legs, etc.
Check for platform overload condition.
Contamination holding open the lowering
valve or the check valve.
Remove and inspect valves. Clean per instructions
in the “Inspecting and Maintaining” section.
Platform raises, then
drifts down.
Contamination holding open the lowering
valve or the check valve.
Remove and inspect valves. Clean per instructions
in “Inspecting and Maintaining” section.
Spongy or jerky
platform
movement.
Excessive air in the hydraulic cylinders.
Bleed air per procedure described in the
“Inspecting and Maintaining” section.
Platform won’t lower.
Perimeter toe guard actuated.
Check for a toe guard extrusion or rubber corner
that is stuck. Adjust if necessary.
Perimeter toe guard switch or wire broken.
Inspect visually; check with mutimeter. Repair as
needed.
Solenoid coil is bad.
Check with multimeter using the diode-check
function. (Reading for ohms will not provide an
accurate test of the coil). Replace if bad.
Physical blockage of the mechanism.
Inspect for foreign material or objects blocking
the scissors or the rollers.
Solenoid valve, flow control, or suction hose
screen plugged.
Remove and inspect valves. Clean per instructions
in “Inspecting and Maintaining” section.
Platform lowers too
slowly.
Solenoid valve, flow control, or suction hose
screen plugged.
Remove and inspect valves. Clean per instructions
in “Inspecting and Maintaining” section.
Velocity fuse locking (indicated by platform
only slowly creeping down).
Check for air in hydraulic system. Bleed air as
needed.
Flow control valve spool sticking.
Remove and inspect valves. Clean per instructions
in “Inspecting and Maintaining” section.
Platform lowers too
quickly.
Flow control valve spool sticking.
Remove and inspect valves. Clean per instructions
in “Inspecting and Maintaining” section.
Bekijk gratis de handleiding van Vestil EHLTT-H-4848-2-47, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Vestil |
| Model | EHLTT-H-4848-2-47 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 8414 MB |
