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Troubleshooting
Functional faults can be diagnosed using the table below. If you cannot correct the fault, contact
your nearest trained VB-Airsuspension partner.
In case of air loss, immediately contact an authorised specialist workshop and drive extra
carefully at a much lower speed (max ± 30 km/h.).
Information about trained partners and the spare parts you might need can be obtained from
VB-Airsuspension Aftersales. They will be pleased to help.
Tracing faults
Fault
Possible cause
Remedy
Vehicle is tilted
Load was moved after the air
suspension was switched off
Switch on the air suspension,
lower the vehicle and reset the
vehicle height
The remote control does not
respond
Ignition switched off
Switch on ignition
7.5 A fuse faulty
Replace the 7.5 A fuse
Battery voltage too low
Charge the battery
Compressor not working
Ignition switched off
Switch on ignition
40 A fuse faulty
Replace the 40 A fuse
Battery voltage too low
Charge the battery
Compressor does not switch off
Compressor relay faulty
Remove 40 A relay
Air loss
Consult workshop
Air suspension does not lower
Driving too fast
Stick to speed limit
7.5 A fuse faulty
Replace the 7.5 A fuse
Air suspension does not raise
Vehicle too heavily loaded
Reduce load
Driving too fast
Stick to speed limit
7.5 A fuse faulty
Replace the 7.5 A fuse
Risk of damage!
Before raising one or more axles with a jack or hydraulic ramp, switch off the air
suspension system using the SERVICE button.
Working on the system can be dangerous!
• Before carrying out emergency inflation, remove the fuses from the fuse box.
• Never inflate the air springs to a pressure of more than 8 bar.
• Consult your conversion station if necessary.
The valves are arranged so that they can easily be matched to the correct side. The valves
are also marked.
In case of faults that are not mentioned in this table or that you cannot rectify yourself,
contact a trained VB-Airsuspension partner.
“The constant ride-height of the vehicle reduces tyre wear and lowers fuel consumption.”
Changing a wheel
The VB-Airsuspension system must not be used to lift wheels from the ground during servicing
work.
Always use a jack or hydraulic ramp to change a wheel or carry out other servicing work.
Remove the 7.5 A fuse and replace it afterwards.
Emergency inflation
In the engine compartment there are two inflation valves on a mounting plate. These are used to top
up the system in case of emergency. If the air suspension system fails, the air spring can be pumped
up manually.
a
b
c
d
a
Rear right
(black)
c
Front right
(red)
b
Rear left
(green)
d
Front left
(blue)
