Let's take the MEL config out of the equation first.
Then,
. OEBs substitute any other procedures and shall be executed first.
. if no OEB applicable, then _for dual bleed fault_
-> no applicable ECAM is available
-> use the paper QRH procedure provided for this particular case
. eventually you may get CAB ALT,
-> stop troubleshooting the bleeds and sort this new, top priority issue
-> by following applicable ECAM proc (displayed)
-> possibly actioning full blown EMERG DES
Originally Posted by AIR ENG 1+2 BLEED FAULT
Apply this procedure when both engine bleed supply systems are failed. In this configuration, the CAB
PR EXCESS CAB ALT may trigger. In this case, apply the ECAM procedure associated to the CAB
PR EXCESS CAB ALT before continuing this paper procedure.