It is a case of the ECAM system display logic not being apparent by just looking at the FCOM.
The display of the various action lines depend on the actual Failure Case leading to the triggering of the ECAM:
When SB/BAI valve failed:
AVOID ICING CONDITIONS
THR LEVER n ………… IDLE
OR
When TBV valve failed:
A/THR ……………. OFF
AVOID RAPID THR CHANGES
Hope this helps.