i can see how the power selection switches in luban, but does not turn on.
Got further answer from Snapmaker support team:
“I asked a software development colleague at Artisan about this issue, and he told me: Whether it is in Luban or on the screen, when using Artisan to start printing, in the workflow we set, when the machine starts printing and ends printing, The purifier function is automatically turned on and off, so command control cannot be used in luban. You can click “Control-Air Purifier-Turn on Air Purifier” on the screen.”
from the reply from support, i conclude that the air purifier cannot currently be controlled via a gcode. I have now requested this as a future function.