W&H Perfecta 900 Instructions For Use Manual page 12

Safety notes
Danger zone
The control unit is not suitable for use in areas in which special conditions prevail (e .g . corrosive or explosive atmospheres) .
Power failure
In the event of a power failure or if the Perfecta is switched off, the last speed set is saved and re-activated on power-up .
Intermittent operating mode S6 (4min/10min) is the designation for continuous operation with intermittent loading .
The recommended loading time is 4 minutes at a running time of 10 minutes .
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