10254

Press the ALARM CANCEL button to clear the alarm from the display.

Check if any programs were being edited, deleted, or the NC memory was being accessed when the alarm occurred.

Wait for all background processes to complete, then initiate the reorganization again through HMI: Program Manager -> Execute -> Reorganize.

Do not interrupt the reorganization process once started. Ensure no program editing or mode changes occur during reorganization.

Allow the reorganization to complete fully without interruption. Verify completion message appears on HMI.

Access HMI Services -> Memory -> Display memory status and check available NC user memory percentage.

If memory is over 80% full, archive and delete unused NC programs, subroutines, and obsolete data to free space.

Always backup programs to external media before deletion.

Delete temporary files and clear alarm logs if memory is critically low: Diagnostics -> Delete alarm buffer (archive first).

Perform a controlled power cycle (shutdown via HMI, wait 30 seconds, power on), then retry reorganization with sufficient free memory.

Ensure all programs are saved before power cycle.

Boot the system into NCK RESET mode: Power on while holding POWER ON + RECALL buttons until boot menu appears.

This procedure requires familiarity with SINUMERIK boot procedures. Consult documentation if unsure.

From boot menu, select 'File System Check' or 'Repair File System' and allow the system to scan and repair NCK inconsistencies.

If errors persist, restore a known-good NCK backup from archive or consider upgrading to SW 4.x or later where this alarm is obsolete.

Contact Siemens service or qualified technician before performing NCK restore operations.

Document recurring issues and consider software upgrade to current version where reorganization algorithms are improved and this alarm no longer exists.