W&H assistina MB-300 Instructions For Use Manual page 27

Start-up – initial filling
Carry out the initial filling with the Assistina empty of transmission instruments.
Close the cover. Press the »Start« button for approx. 5 seconds.

The initial filling process for the Assistina unit will take approx. 2 minutes.
The »Start« LED light up green. The device is ready for use.
If the Assistina unit has been out of use for an extended period of time (approx. 14 days), repeat the initial filling process.
27