the airbus Auto thrust is not that complicated if you think of it as a thrust rating panel, rather than a conventional set of throttles.
If you set 1 thrust lever out of CL detent youŽll get an ECAM message LVR ASSYM (lever assymetry) and a master caution announcement once every 5 seconds.
I suppose that particular engine either is limited by the thrust lever angle you put it at or goes to MCT or TOGA, depending on where you set it.
Regards,
SW.