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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.

122

Brake fault

Kuka · KRC2 KSS System Message

What does 122 mean?

The brake cable monitoring device has detected a short-circuit, overloading, or a break in the brake cable connection. This will result in path-maintaining braking and stop program execution.

Common Causes

  • Brake engagement mechanism failed to disengage or engage correctly.
  • Brake coil short-circuited or open-circuited.
  • Low brake release voltage (e.g., less than 24VDC) preventing disengagement.
  • Mechanical obstruction preventing brake movement.
  • Fault detected in brake control circuit feedback (e.g., P3-01).

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Rectify the fault in the brake cable (short-circuit, overloading, or break in connection).

  2. 2

    Reset the fault by pressing the hardware acknowledgement button 'ACK' on the DSE I module.

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

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Source: Kuka KRC2 KSS System Message
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