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21.3.1
Memory fault
In case of a fault in the Main board S/W (system program) or the MMI board S/W, the
following fault message will be shown:
FAULT: Checksum system program, Control Unit xx
(Main board software.)
FAULT: Checksum MMI program, Control Unit xx
(MMI board software.)
FAULT: No connection with MMI board, Control Unit xx
(Not shown in the display, only via EBLWin, Gateway / Web-server or via another unit in
the system).
No contact with Main board
This is also indicated by LED "System fault" and the buzzer sounds steady (continuous).
The Fault TX output is "activated".
A new download of the S/W (system programs) is required and/or the Main board and/or
the MMI board have to be replaced.
Note: After SSD download, the following messages may be shown:
Checksum fault in downloaded data.
Control unit will now restart.
After restart:
FAULT: Restart Control Unit nn, code xx,
address yyyyyyyyy
FAULT: Site specific data (SSD), control unit xx
This means that the SSD has not been successfully downloaded. A new SSD download
has to be performed.
109
Operation Manual
FT1020G3 Rev 2.10.4
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