Hamilton Beach Commercial HBF900S Serie Manuel D'utilisation page 6

Using the Control Panel
Interlock Lid Indicator Light
The light will flash when lid is not in place. The flashing light will
stop when lid is in place and blending can start.
Speeds
Press to select LOW, MED or HIGH.
6
START/STOP
Press to START or STOP operating.
PULSE
Press and hold for desired time.