W&H Perfecta 900 Instructions For Use Manual page 28

Operating controls – Changing motor handpiece / Coolant supplying
By deactivation of the program button it can be changed to motor handoiece LA-66 (optional) .
At the change on motor handpiece LA-9 the coolant spray becomes co-activated automatically .
Deactivating resp . activating the coolant spray: press program button x 1 .
28

Keep the program button
pressed fter approx .
a
2 seconds, an audible signal
sounds .
No LED illuminates .

Keep the program button
pressed fter approx .
a
2 seconds, an audible signal
sounds .
Both LEDs illuminate .

Start motor handpiece by
pressing the pedal or flap .

Start motor handpiece by
pressing the pedal or flap .