Thorn autocall TFX 800M X BUS FAILURE

[Brad <865b5cd0025b5446449bdb269b2b3602_@xxxxxxxxxxx>]

I have a thorn autocall tfx 800 m fire control system with X BUS FAILURE ,
System Zone Non Addressable Pnt. LB00 P05 001.

Does the 001 indicate one trouble in the system?  What does the P05 indicate?
Also at a loss on LB00?

Thanks for any help

Brad

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