Operating Instructions ACU
2.6 Warning information and symbols used in the Operating
Instructions
2.6.1 Hazard classes
The following hazard identifications and symbols are used in the Operating Instructions to mark
particularly important information:
Identification of immediate threat holding a high risk of death or serious injury if not
avoided.
Identification of immediate threat holding a medium risk of death or serious injury if
not avoided.
Identification of immediate threat holding a low risk of minor or moderate physical
injury if not avoided.
Identification of a threat holding a risk of material damage if not avoided.
2.6.2 Hazard symbols
2.6.3 Prohibition signs
No switching; it is forbidden to switch
the machine/plant, assembly on