2015 R31-CB Main Head Question

[JeffreyAC77]

All of a sudden after recent guests in our boat - the main head display is showing a brightly lit lock (in the unlocked position). I have never seen this before and am concerned someone may LOCK the toilet from working - can anyone tell mw what this is and if I need to somehow turn it off or ???? thanks,

 

[SKing]

If you download the pdf manual it will give you all the settings and how to use them. I cant share a manual with you otherwise I would.