The lifting booms are controlled by microswitches:
▪ M1A on the pantograph.
▪ M1B on the boom.
▪ M1C on the Jib.
▪ M1E on the telescopic extension;
▪ M1S on the telescopic extension (only A17
JE with rotating jib).
Once a year check the working conditions of the
microswitches M1.
The functions of the microswitches M1A- M1B-
M1E are the following:
With platform not in rest position (at least one
of the microswitches M1A-M1B-M1E is
activated):
▪ the safety drive speed is automatically
activated;
▪ The pot-hole guards are activated.
▪ if the chassis is inclined over the max.
allowed inclination the lifting and drive
controls are disabled;
▪ The compensation control for platform
levelling is disabled.
▪ when the platform is overloaded ALL
operations until removal of overload are
disabled.
The function of the M1S microswitch (only on A17
JE with rotating jib) is the following:
▪ when the telescopic extension reaches the
last 250 mm extension the drive control is
inhibited.
The following functions of the microswitch M1C
on the Jib were designed to support
loading/unloading from the ramps of a vehicle:
▪ With booms in rest position (microswitches
M1A-M1B-M1E not activated), and Jib with
inclination higher than +10° according to the
horizontal axis (M1C activated):
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