26050

Fault in brake resistor, KPP/KSP (axis)

Kuka · KR C4 Operating Instructions

What does 26050 mean?

The KPP has detected an error within the ballast circuit, which includes the brake resistor. This indicates a problem with the energy dissipation system responsible for braking the motor, potentially leading to uncontrolled deceleration.

Repair Steps

  1. 1

    Check the ballast resistor for physical damage, an open circuit, or an incorrect resistance value using a multimeter.

  2. 2

    Check the cabling between the KPP and the ballast resistor for continuity, short circuits, and proper connections.

  3. 3

    Reinitialize the drive bus by performing a Power Off / Power On cycle of the entire system.

  4. 4

    Check the KPP module itself for internal faults if the ballast circuit components are verified correct.

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Verified technical data. Last updated: March 2026
Source: Kuka KR C4 Operating Instructions