en-938821/2 7 - 5System Faults77.1 Hardware FaultMessage displayed at initialisationPARAMETER TABLECHECKSUM ERRORCONTINUE (Y/N)?Commentlt is probably a hardware fault (faulty card, etc.).ActionsContact the NUM Service Engineer.7.2 Customisation ErrorMessage displayed at initializationOPTIONS NOT VALIDCONTINUE (Y/N)?CommentThis message should never be displayed: it would indicate an illegal attempt to modify the list of software options!!!ActionsAcknowledge the message. + YThe system is available, but the machining modes are inhibited.The system error indicator «PRSER» is displayed in the status window (See 3.1.3).Contact NUM.