This is getting pretty funny. I dont recall seeing a fault message 34-11-15 but several pages back, someone posted a listed of components and their related AMM references and said that they were fault messages. I've reproduced the first page of eight pages of the AMM reference 34-11-15. As you can see, this tells you how to replace the Pitot probe.
These fault messages are for use by maintenance personnel as a starting point for troubleshooting. Different fault codes give different clues and different starting points in the troubleshooting process. Nobody stands around trying to interpert them.
I would hope that nobody thinks that this aircraft seriously produced 256 pages of faults. The airplane would have to have been falling apart one component at a time. There were probably endless streams of messages to the maintenance control department from all over the world that night and these messages wound up on these pages.