50
_________________________________________________________________________________
ISSUE
REASON
CORRECTIVE ACTION
Electric motor stops suddenly
during operation.
Power failure.
Emergency stop button is
active.
Electric motor thermal overload
relay (F41) in connection box
has gone off.
Burnt fuse.
Connection fault in mains or
12 V wiring.
Lower the booms by using the
emergency lowering. Check that
there is current in mains.
Release all emergency stop
buttons.
Wait for approx. 5 min and start
the motor
– the relay will return
to ON automatically. Find out
the reason for overload.
Replace fuse (see 0).
Check voltages and wirings.
Movements don’t work even
though the combustion engine /
electric motor is running.
Failure in hydraulic system
–
e.g. hydraulic pump broken.
Overload on platform.
Check hydraulic pressure. If
there is no pressure check
function of hydraulic pump
safety valve
Remove overload.
Combustion engine / electric
motor stops when booms are
lifted from transport support.
Outriggers are not correctly
deployed down to support
position
– green indicator lamp
is not lit.
Lower the booms down to
transport supports with
emergency lowering, restart the
combustion engine / electric
motor and deploy the outriggers
properly so that the green
indicator lights up.
Boom(s) come down by itself.
Dirt in load control valve or
defective valve.
Dirt in emergency lowering
valve or defective valve.
Cylinder seals faulty.
Clean valve with compressed
air, if that doesn’t help change
valve.
Clean valve with compressed
air, if that doesn’t help change
valve.
Change cylinder seals.