24
Lift button does not work.
Main lift or lifting table:
Runways do not move up.
• Hydraulic oil level too low.
1. Refill hydraulics up to gauge
mark (
→
Chapter 9.4).
2. Check with dipstick.
Attention: Using rapeseed based
oil destroys the seal.Use only
biodegradable oils(HEES-oils
based on synthetic esters).
The water content of the oil may
not exceed 2 %.
Do not mix bio-oils with mineral
oils.
Runways do not lift with a load.
They do however rise without a
load.
• The lift is overloaded. Rated
load capacity ex-ceeded,
maybe on one runway.
• Hydraulic pressure incorrectly
set on pressure control valve.
1. Check vehicle weight.
If necessary reposition the vehicle
(
→
Chapter 2.3. rated weight
distribution).
2. Correct setting on pressure
control valve.
Power failure on main lift which
is locked in the latch bars.
• No mains supply.
Can only be lowered with manual
pump and optional hydraulic power
unit.
5.2 Troubleshooting by authorized maintenance contractors
Problem
Possible cause
Actions
Control unit does not work.
A buzzer sounds.
• Runways misaligned. Misa-
lignment protection activated.
Lower the lift or lifting table,
→
Chapter 6. Authorized lowering.
The main lift does not react
when being lowered.Only
lifting table can be lowered.
A buzzer sounds.
• Cable too slack or damaged.
Slack cable switch activated.
1. Tighten and adjust cable (
→
Chapter 11.11 and 13.4),
Change if necessary.
2. Lower lift completely (
→
Chapter 6).
3. Carry out function test.
Lift does not work.
A buzzer sounds
• Fuses damaged.
• Thermal protection discon-
nected.
• Transformer damaged.
Depending on cause:
• Reset or replace fuses.
• Connect thermal protection.
• Replace transformer.
