There is a lot of people referencing of the old FCOM blue diagram showing all the possible failure cases, and the associated actions. This has been removed as far as I can tell in the big documentation overhaul.
However, (At least for my company, perhaps it's tailored"), there is a simpler description of actions to be taken, located in:
NOR-SOP-18/ Aircraft Guidance Management /Approach Using LOC GS Guidance / Management of Degraded Guidance
Does everyone else have this in their new NOR as well?
It seems to give quite a good, simple explanation of what to do:
FOR CAT II, CAT III OPERATIONS
In the case of:
‐ Amber caution (single shime), or
‐ Landing capability degradation.
Above 1000 ft:
ECAM / QRH PROCEDURE................................................... ........ COMPLETE
REQUIRED EQUIPMENT................................................... ..................CHECK
Refer to QRH/OPS Required Equipment for CAT2 and CAT3
APPROACH AND LANDING CAPABILITY............................................ CHECK
If required:
RVR......................................................... ................................CHECK
DH.......................................................... ...............................ADJUST
BRIEFING.................................................... ........................ CONFIRM
If the flight crew does not complete all the above actions at 1 000 ft:
GO AROUND FLAPS....................................................... ........ COMPLETE
Below 1000 ft:
If external visual references are not sufficient:
GO AROUND FLAPS....................................................... ........ COMPLETE
Below 100 ft (Alert Height) for CAT 3 DUAL:
Approach may be continued unless autoland light comes on.
In the case of Autoland warning light:
Visual references not sufficient:
GO AROUND FLAPS....................................................... ........ COMPLETE
Visual references sufficient:
Approach may be continued manually