Diagnostics
9
9.1 Error messages
These error messages are shown on the 7-segment display (Page39) as continuously running
text ("ticker").
Note
When submitting a query to SIEMENS Technical Support: In addition to the message shown on
the 7-segment display, additional information regarding the status LEDs and the operating state
(continuous operation, switch-on phase, restart, etc) can provide important information on
resolving your problem.
7-segment display Meaning Troubleshooting
C "Crash" or kernel panic: The Linux system no longer
responds
1. Restart the NCU.
2. Execute the "DIDAC" diagnostics option.
This function saves all the diagnostic data
to a ZIP le.
3. Contact SIEMENS Technical Support and
transfer the zipped diagnostics data.
Copy FAIL Firmware installation failed.
F "Failure"
F. The point is continuously lit and no longer ashes:
NCK crash
Lxx=yyy Internal error when starting NCK, "xx" is the line
number in the mcsystem.ini, "yyy" is a unique error
code for the code position.
Merr "System Restore Error": A system restore point instal‐
lation failed.
• Check the log le under "/var/log/initn‐
cu.log".
• Contact SIEMENS Technical Support.
NO ARC The CNC software package is missing or cannot be
found on the SD Card.
Boot the NCU using the SINUMERIK service sys‐
tem, and check the partition using the "Check
storage integrity" diagnostics option.
• Replace the SD Card if it is shown to be de‐
fective.
• Contact SIEMENS Technical Support if the
SD Card is not defective.
NO SD The operating system cannot detect an SD Card.
• Insert the SD Card.
• Check that the SD Card is correctly inserted.
• Check whether the SD Card is defective.
NO SSD The internal storage medium was not detected. Contact SIEMENS Technical Support.
PART FAIL Error when repartitioning Boot the NCU using the SINUMERIK service sys‐
tem, and check the partition using the "Check
storage integrity" diagnostics option.
NCU 1750
Equipment Manual, 10/2023, A5E45627807B AH 93
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