130
Maintenance and Service
Operator's Manual GB
8.6.2
Fault
Probable cause
Action
One function of the control-
ler does not work.
One lever of the controller
was not in neutral at start
up.
1. Push in the Stop button.
2. Make sure that all levers
are in neutral.
3. Release the Stop button.
Crane does not react to con-
trols. Indicator lamps light
up on the user panel.
The crane is in an OLP
situation.
Perform movements to re-
duce the load moment. If
necessary, release OLP.
Crane does not work proper-
ly:
One or more crane functions
do not work, or not proper-
ly.
Lifting capacity is much less
than normal. Operating
speed is significantly re-
duced.
The service lamp is lit.
The system has detected a
fault.
Contact a HIAB service
workshop.
Cane performance when op-
erating it with the controller
is unsatisfactory.
The pressure-reducer filter is
clogged.
Replace the pressure-reducer
filter.
Boom system cannot keep
the load height, and it goes
down by itself.
Load holding valves on the
first boom or second boom
damaged.
Go to a HIAB service work-
shop.
Cylinder internal leakage.
Go to a HIAB service work-
shop.
Boom extension cylinders
do not follow the sequence.
Cylinder internal leakage.
Go to a HIAB service work-
shop.
Boom extensions shake dur-
ing extending/retracting
function.
Cylinder internal leakage.
Go to a HIAB service work-
shop.
Sequence screw in cylinder
head loose.
Tight the screw in the right
position.
Boom extensions cannot
keep the load height and
they move out by them-
selves.
Extension load holding
valve damaged.
Go to a HIAB service work-
shop.
Cylinder internal leakage.
Go to a HIAB service work-
shop.