Error during startup on XC44

Good afternoon,

I have a system that uses an MD4-5 as the master and several XCx modules as extension módules. One of the XC44 modules randomly fails to connect when I power up the system, and the LEDs indicate the following error:

"R4:3 3:1:7 Startup check. Expected after update of XC4x to FS capable version."

This error is random; it may not appear for a week or it may appear several times on the same day.

I have checked the wiring and it is correct, as is the battery voltage.