1603
Safety fence open
Kuka · KRC2 KSS System Message
What does 1603 mean?
The safety fence is currently open, which prevents safe operation of the equipment.
Common Causes
- Safety gate or door sensor has not been activated.
- Malfunctioning safety gate switch.
- Wiring fault to the safety gate monitoring circuit.
- Emergency stop button engaged.
- Access panel left open during operation.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Close the safety fence.
Verified technical data. Last updated: March 2026
Related Faults
Source: Kuka KRC2 KSS System Message