ResMeds9 readout on machine screen

[Eton]

For a long time the ResMed s9 autoset readout screen gave me the mask fit,the AHi, the hours used and the next screen broke the Ahi down into centrals as well. Now for some reason I do not get the screen that shows the centrals. Sleep quality is set to on. Not sure what has happened here, anyone have this problem, or know how to fix it? thanks