FRITSCH PULVERISETTE 4 classic line - Manual (Page 15)

2. Insert the provided triangular key into the manual release of the
safety interlock (through the bore hole) and turn it to the right.
3. The hood releases after the twist lock on the front side of the
hood is opened.
4. The mill cannot be turned on now. To turn it on, the safety lock
has to be activated by turning the triangular key to the left and the
hood and hood lock must be locked.
2.7 Hazardous points
n Crushing hazard when closing the hood
n Crushing hazard at the grinding bowl clamping device
2.8 Electrical safety
2.8.1 General information
n The main switch separates the whole device from the power supply
on all poles.
n Switch off the main switch if the device will be idle for a longer
period of time (e.g. overnight).
2.8.2 Protection against restart
In case of power failure during operation or after switching off with the
main switch, the hood is locked. The hood lock is opened when power
returns. For safety reasons, however, the mill does not restart.
2.8.3 Overload protection
In the event of an overload, the device reduces the speed in a controlled
manner. If the main disc is overloaded error code 7 or 8 flashes in the
display. The device switches off if the drive motor becomes too hot. The
device switches off if the drive is blocked. (See Ä Chapter 10 ‘Repairs’
on page 47)
Safety information and use
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