EL
ErrorLib
Brands
||
  1. Home
  2. Kuka
  3. KR C4 extended
  4. 26051
About·Privacy·Terms

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.

26051

Ballast circuit overload, KPP/KSP (axis)

Kuka · KR C4 extended

What does 26051 mean?

The ballast circuit is experiencing a permanent overload, indicating that the braking energy being generated is consistently too high for the connected ballast resistor. This can lead to overheating and damage to the brake resistor and drive.

Common Causes

  • Heavy loads are being braked too frequently.
  • Ballast resistor fault or incorrect sizing.
  • Cabling between KPP and ballast resistor is damaged or improperly connected.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reduce the frequency of braking heavy loads in the robot program.

  2. 2

    Inspect the ballast resistor for damage or overheating and verify correct sizing.

  3. 3

    Check cabling between the KPP and the ballast resistor for damage and correct connections.

  4. 4

    Reinitialize the drive bus: Power Off / Power On.

  5. 5

    Check the KPP module.

Browse all codes in this manual (35)
Verified technical data. Last updated: April 2026

Related Faults

26030Device state: OK26031Internal error, KPP/KSP (axis)26032IxT overload error, KPP/KSP (axis)
Source: Kuka KR C4 extended
Open Manual (Page 235)Search more codes in this manual