Malfunctions in driving mode
8.4 Troubleshooting
Operating manual 3 302 709 en 8 - 25
GMK5150L
12.01.2018
8.4.7 Malfunctions of the service brake
H
Further information; Ã Warning messages on the CCS display, p. 8 - 13.
8.4.8 Malfunctions on the suspension
Malfunction Cause Solution
Lights up while
driving or does not
go out after the
engine is started
The air pressure in one of
the two circuits has fallen
below 5.5 bar (80 psi)
The vehicle can be driven
slowly to the next repair shop
The air pressure in both circuits
has fallen below 5.5 bar (80 psi)
1. Top up the compressed-
air supply on the filler
connection;
à p. 8 - 29
2. Tow the truck crane with
the tow-rod;
à p. 8 - 29
Parking brake una-
ble to be released
Supply pressure too low
à Building up supply pressure,
p. 5 - 10
The retarder can-
not be engaged
Fuse F7/4 blown Replace blown fuses;
à p. 8 - 50
Malfunction Cause Solution
Suspension cannot be
activated
Current speed above
about 5 km/h (3 mph)
Slow down or stop the truck
crane
Compressed air system
insufficiently filled
à Building up supply pressure,
p. 5 - 10
Axle loads not evenly set Use the “Raise axle“ function
to set the axle loads evenly;
à p. 12 - 66
Suspension is switched off
à Switching the suspension on,
p. 5 - 17
Suspension cannot be
switched on or off
Control unit fuse blown Replace blown fuses;
à p. 8 - 49
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