5641
Safety doors are open
Heidenhain · NC Control
What does 5641 mean?
The machine's safety doors are open, preventing machine operation due to safety interlock. This is a normal and expected safety response.
Common Causes
- Safety doors are open.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Ensure all safety doors are fully closed and securely latched.
- 2
Inspect the safety door interlock switches for proper engagement and functionality.
- 3
Check for any physical obstructions preventing the safety doors from closing completely.
- 4
Verify the wiring of the safety door interlock circuit for continuity and proper signal transmission.
Verified technical data. Last updated: March 2026
Related Faults
Source: Heidenhain NC Control