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5.4
Troubleshooting or error display and remedy
Lifting problems
Symptoms
Lift does not lift when button is
pressed (motor does not run)
Lift does not lift when button is
pressed (motor running)
Lifting platform lifts jerkily
Lifting platform continues to lift
after releasing the button
® Copyright ATH-Heinl GmbH & Co. KG / All rights reserved / Misprints and technical changes reserved
Cause
Damage to motor
Blown fuses due to e.g. voltage
fluctuations
Defective button and/or contact
Defective main switch and/or
contact
Defective or insufficient supply
cable
Fluctuating or incorrect input
voltage
Defective motor contactor
Thermal relay has tripped
Limit switch defective or blocked
Hydraulic oil shortage
Oil filter clogged
Oil loss
Open lowering valve
Wrong direction of rotation of the
engine
Defective gear pump
Permissible load has been
exceeded
Pressure relief valve set too low
Too little space between slideways Distance between slideways and
Air in hydraulic system
Dirty hydraulic oil
Slideways are not lubricated
Defective button or contactor
Release date: 02.05.2023 / Product manufacturer ATH-Heinl GmbH & Co. KG
Solution
Check motor and replace if
necessary
Eliminate causes and replace fuses
Replace button and/or contact
Replace main switch and/or contact
Replace cable
Check voltage
Replace motor contactor
Check thermal relay and motor
Check limit switch, replace if
necessary
Refill oil
Clean oil filter
Replace damaged components
Check and replace the lowering
valve if necessary
Replace phases
Check the pump and replace if
necessary
Work within the specified payload
Set pressure relief valve to
maximum working load
guide must be 1.5 - 2.5 mm
Bleed the hydraulic system
Change the hydraulic oil
Lubricate the slideways
Replace the defective button or
contactor
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