ATH-Heinl Four Lift 64AP Bedienungsanleitung Seite 112

Problems during lowering
Symptoms
Lift does not lower
Platform lowers too slowly or
jerkily
Lift lowers by itself
Other problems
Symptoms
Lift does not raise and lower
synchronously
Product shows (severe) rust
damage
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112
Cause
Safety catches do not react
Defective control relay
Obstacle under platform
Hose rupture protection triggered
Lowering valve is not activated
Solenoid coil of lowering valve
defective
Lowering valve defective
Valve for lowering speed
incorrectly adjusted
If the faults cannot be rectified, lower the lift using the
emergency lowering screw and contact our service team
Lowering valve dirty
Valve for lowering speed
incorrectly adjusted
Leaky hydraulic connections
Leaky hydraulic lines
Leaky hydraulic cylinder
Dirty or defective lowering valve
Leaky check valve
Cause
Air in hydraulic circuit
Damage or insufficient corrosion
protection Maintenance if
necessary
Release date: 02.06.2023 / Product manufacturer ATH-Heinl GmbH & Co. KG
Solution
Check cable connection Check
electromagnets, replace if
necessary Relieve detents by raising
them
Check control relay
Remove obstacle
Raise platform briefly and press
"DOWN" again
Check electrical connection
Replace solenoid coil
Exchange
Adjust
Clean lowering valve
Adjust
Tighten connections, seal if
necessary
Replace hydraulic line
Replace seals and clean hydraulic
system
Clean or replace the lowering valve
Clean or replace
Solution
Bleed hydraulic circuit
Remove rust, clean and restore
surface.