Seems, >>> fairly straight forward; If the REV FAULT is triggered due to FADEC or sensor only faults, the warning is Inhibited.. no Master Caution, Go scenario.
If the REV FAULT is triggered due to the reverser position, or potential unlock/ deployment, the caution is not inhibited.. Stop
Either way, if it does deploy, the system deals with it, as described earlier, reducing effected engine thrust to idle.
The Airbus manuals must rate amongst the worst produced, no wonder there is a wealth of interpretations and home grown FCTMs about!