Code 231-F300: CC%2 Cancelation of the cutout channel test %1
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical CC%2 Cancelation of the cutout channel test %1 alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
[Cause of error] - The switch-off test was ended automatically because the maximum permissible delay time was exceeded. - The NC did not properly finish a test section. - The NC does not perform a certain test. [Error correction] - Check whether a previous system error of the NC led to the cancelation of the test section - Check the software version - Inform your service agency
Source: HEIDENHAIN NC Error Messages — TNC7/640/620/320/128, CNC PILOT 640, MANUALplus 620 (10/2023)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Heidenhain TNC Series CNC Alarms
Heidenhain controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 231-F300 on the TNC Series CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Heidenhain's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 4497 Heidenhain TNC Series CNC codes.
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