Use and Maintenance Manual - X_RT Series Page 73
7.3.14 Operation check of safety microswitches
Some microswitches are placed in strategic positions to check the different configurations of the machine and activate safety
functions. Their activation implies visual indication through the warning lights located on the platform control panel (see relevant
chapter).
The check of the actual operation of the microswitches should be carried out at least every year.
7.3.14.1 Microswitch M1
The microswitch M1 on the chassis checks the position of the lifting structure. With platform completely lowered the microswitch
M1A is not activated.
With lifted platform (with some tolerance due to the type of activation of the microswitch), the microswitch M1 is activated and:
The safety drive speed is automatically activated.
The levelling outriggers control is disabled (if available).
If the chassis is inclined over the max. allowed inclination the lifting and drive controls are disabled and:
The danger warning light and danger audible alarm turn on.
The drive enable warning light turns off.
The lifting enable warning light turns off.
When platform is overloaded ALL operations until removal of overload are disabled and:
The overload warning light and danger audible alarm turn on.
The drive enable warning light turns off.
The lifting enable warning light turns off.
7.3.14.2 Microswitch M3 (OPTIONAL)
The microswitch M3 (OPTIONAL) on the chassis checks the position of the lifting structure. The activation of the microswitch M1S
stops the drive control at a given platform height from the ground and turns off the drive enable warning light.
Not all machines mentioned in this manual have a microswitch M1S; check in the chapter “TECHNICAL FEATURES” if the
maximum drive height is different from the maximum height that the platform can reach.
7.3.14.3 Microswitch M3 (OPTIONAL)
The microswitch M3 (OPTIONAL) on the chassis checks the position of the lifting structure. The activation of the microswitch M3
stops the lifting movement (lifting microswitch) before reaching the lifting cylinder end stop and turns off the lifting enable warning
light.
7.3.14.4 Sensors ST1A-ST1B-ST1C-ST1D (machines with levelling outriggers)
The sensors ST1A-ST1B-ST1C-ST1D on the chassis near the levelling outriggers check the position of the pads of the levelling
outriggers.
With pads completely lifted all sensors ST1…are activated and:
Drive can be controlled – drive enabled warning light is on.
All levelling outriggers position warning lights are off.
With at least one pad not completely lifted one or more sensors ST1…is activated and:
Drive is disabled – drive enable warning light is off.
The levelling outriggers position warning light concerning the levelling outrigger that has not retracted is flashing.
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