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. 1

    Close the safety fence.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Kuka KRC2 KSS System Message