Fancoil FC/S - comfort mode

[bru]

Hi EIB users,
I have an issue about the fancoil device use.
If I'm switch to comfort mode my device the fanStatus property is automatically changed to 0 so if I was in automatic mode (fanstatus=1) after switching to comfort mode the using mode become Manual.
Do you know something about this?
The EIB device that I'm using is ABB FC/S 1.1 but his manual doesn't talk about this matter.

Thanks!
bru