45
5.2. OPERATIONAL PROBLEMS RELATED TO MOVEMENTS
FAULT
REMEDY
6. None of the boom movements is operational, although the electric motor is running
and the selector switch is in the correct position (operation from the chassis control
centre or the platform control centre)
Green signal light for outriggers is not
illuminated.
Check the operation of the outrigger limit switches
RK11, RK12, RK13 and RK14.
Green signal light for the outrigger limit switches
is illuminated, but the boom movements do not
operate.
Check the operation of the safety relay SR2 for
the outrigger circuit.
The lift has been overloaded.
Reduce the platform load
or
Retract the telescope until the platform
returns inside its operating range (the
green light in the platform control centre
is illuminated).
1
2
3
4
7. Outriggers do not move
Boom is not resting on the transport support.
Drive the boom onto the transport support.
The selector switch (1) is in the wrong position.
Turn the selector switch to the correct position.
Limit switch on the boom support has not closed. Drive the boom onto the transport support and
check the operation of the limit switch RK3.
8. Malfunctions of platform movements – only one of the movements can be operated
Irregular and indefinite malfunctions.
Make sure that the hydraulic oil and the filter have
been changed.
Thoroughly clean the solenoid valve spools and
housings (requires utmost cleanliness – particles,
that cause malfunctions, cannot possibly be
spotted with the naked eye).
Also temporary contact failures in the joysticks
may cause malfunctions.
Spray with moisture repellent.
Lifting and lowering of the boom and the
extension of the telescope are not operational,
the red light is illuminated on the platform and
in the chassis control centre, and the buzzer is
audible.
The boom has been overloaded; retract the
telescope and retry the operation (automatic
reset).