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ErrorLib — Industrial Fault Code Library

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26040

Heat sink temperature too high, KPP/KSP (axis)

Kuka · KR C4 extended

What does 26040 mean?

The heat sink temperature on the KPP or KSP module for a specific axis is too high, indicating an overtemperature condition. This can lead to overheating and potential damage to the drive components if not addressed.

Common Causes

  • Cabinet fan is not functioning or obstructed.
  • Ambient temperature in the cabinet is excessively high.
  • Program load is too high for the drive, leading to excessive heat generation.
  • Cooling circuit is obstructed by dirt.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect cabinet fan for operation and obstructions.

  2. 2

    Verify ambient temperature around the controller.

  3. 3

    Review robot program to identify and reduce excessive load on the axis.

  4. 4

    Clean cooling circuit and heat sink fins.

  5. 5

    Check installation site for adequate ventilation slits and clearance.

  6. 6

    Reinitialize the drive bus: Power Off / Power On.

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 234)Search more codes in this manual