7.3.11 Safety microswitches operation check
All microswitches are to be found on the chassis and platform and can be identified by means of labels.
Microswitch functions:
MPT1 and MPT2 (figure 7-12):
▪ Control the position of the two pot-hole guards. With one
or both microswitches open (guards lifted or not
completely lowered) drive is disabled if platform is lifted at
a height from the ground indicated in chapter “Technical
Features” (M1 activated). Their function is excluded if
platform is lowered (M1 free).
M1 (figure 7-9):
▪ Activates drive safety speed with platform at height from
the ground indicated in chapter “Technical features”.
▪ Stops lowering automatically in a position where the
vertical distance between the scissor ends is over 50 mm.
In this condition the movement alarm warns about the
danger condition by increasing its frequency. The operator
on the platform must release the lowering control and wait
until the audible alarm stops (about 3 sec.), then he can
resume the lowering control.
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