Use and maintenance manual Self-propelled aerial platforms Page 53
7.2.9.5
Microswitches ST1A-ST1B-ST1C-ST1D (machines with levelling jacks)
The microswitches ST1A-ST1B-ST1C-ST1D on the chassis near the levelling cylinders check the position of the pads of the
levelling cylinders.
With pads completely lifted all microswitches ST1…are activated and:
-
drive can be controlled – drive enable warning light (R – Fig.5) is ON;
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all levelling jack position warning lights (ZB – Fig.5) are OFF.
With at least one pad not completely lifted one or more microswitches ST1…is activated and:
-
drive is inhibited – drive enable warning light (R – Fig.5) is OFF;
-
the levelling jack position warning light (ZB – Fig.5) concerning the levelling jack that has not retracted is flashing.
7.2.9.6
Microswitches STP1-STP2-STP3-STP4 (machines with levelling jacks)
The microswitches STP1-STP2-STP3-STP4 on the chassis near the levelling cylinders check the position of the pads of the
levelling cylinders.
With all pads not resting on the ground (the machine rests on its wheels) all microswitches STP… are not activated and:
-
lifting can be controlled (unless other alarms) – the lifting enable warning light (T – Fig.5) is ON.
With all pads resting on the ground (the machine rests on the levelling cylinders) all microswitches STP… are activated and:
-
lifting can be controlled (unless other alarms) – the lifting enable warning light (T – Fig.5) is ON.
-
drive is inhibited – drive enable warning light (R – Fig.5) is OFF;
When the machine is resting on both (pads/ wheels):
-
lifting is inhibited – lifting enable warning light (T – Fig.5) is OFF;
-
drive is inhibited – drive enable warning light (R – Fig.5) is OFF;
-
the levelling jack position warning lights (ZB – Fig.5) concerning the levelling jacks that have not retracted are flashing.
