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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

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.

Browse all codes in this manual (36)
Verified technical data. Last updated: April 2026

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Source: Kuka KRC2 KSS System Message
Open Manual (Page 198)Search more codes in this manual