231-A002
Cancelation of brake-line-test call monitoring
Heidenhain · TNC CNC Controllers
What does 231-A002 mean?
This error indicates the cancellation of the brake-line-test call monitoring. The most common cause is that guard doors were open during the brake control test or brake line test, compromising safety.
Common Causes
- Guard door(s) were open during the brake control test or brake line test.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Ensure all guard doors are securely closed and locked before initiating and throughout the brake control test or brake line test.
- 2
Verify the functionality of guard door interlocks and sensors.
- 3
Check the wiring and connections related to the guard door safety circuit.
Verified technical data. Last updated: March 2026
Related Faults
Source: Heidenhain TNC CNC Controllers