® Copyright ATH-Heinl GmbH & Co. KG, 2018, All rights reserved. / Misprints and technical changes reserved / Issue: 08/2014
29
Problems while lowering
Lift does not lower
No reaction of safety notches
Check cable connection
Check pneumatic cylinder, if
necessary changing
Relieve notches by lifting
Defektive control relay
Check control relay
Obstacle under the lift
Remove obstacle
Excess flow cut-off valve activated
Raise the lift shortly and then again
lowering
Lowering valve is not activated
Check electrical connection
Defective solenoid of lowering valve
Change solenoid
Defective lowering valve
Changing
Valve for lowering valve wrong
adjusted
Adjusting
If the error cannot be solved, lower the lift with the emergency sink screw and contact our service team
Lift lowers too slowly resp. jerkily
Lowering valve dirty
Clean lowering valve
Valve for lowering speed wrong
adjusted
Adjusting
Lift lowers itself
Leaky hydraulic connections
Retight connections, if necessary
sealing
Leaky hydraulic lines
Replace hydraulic lines
Leaky hydraulic cylinder
REplace sealings and cleaning of
hydraulic system
Dirty or defective lowering valve
Cleaning or replacing of lowering valve
Leaky non-return valve
Cleaning or replacing
Other problems
Lift raises and lowers not synchronal
Air in hydraulic circuit
Bleed hydraulic circuit
Unsufficient adjustment of
synchronization
Adjust synchronization
Unusual loudness of motors
Missing of one phase on motor
Check supply line to motor
Blow-off valve is activated
Check pressure
Circuit breaker is activated
Check capacity of circuit breaker
Replace the fuses
Check damages on the cable
Replace the cable
