essilor kappa ctd error a254

[optifeira]

Hello there, new user here, i have a question someone might be able to answer regarding an essilor kappa ctd edger (i have 2 because they are powerhorses) and one of them is giving me an error A254 which i dont know what it means, did someone had this error?

Machine powers up but while preparing to go to the menu does the routine check, does some noise and gives error A254, nothing major needs replacing, what could it be?

Regards,
carlos