Intermediate circuit voltage too high, KPP/KSP (axis)

What does 26035 mean?

An overvoltage condition in the intermediate circuit of the KUKA KRC4 KPP/KSP during operation. This often occurs due to excessive regenerative braking energy, high incoming mains voltage, or a malfunction in the braking system.

• Excessive mechanical load during braking, generating too much regenerative energy that the ballast circuit cannot dissipate.
• Incoming mains voltage is too high, exceeding the DC link voltage tolerance.
• Malfunction of the ballast switch (braking chopper) or its control circuit.

Click steps to track your progress.

1. 1

   Check the trace recording of the intermediate circuit voltage to analyze the overvoltage event and its correlation with robot motion.

2. 2

   Measure the incoming mains voltage to ensure it is stable and within the specified operating limits for the KUKA KRC4 system.

3. 3

   Inspect the ballast switch and braking chopper functionality, including control signals and power connections.

4. 4

   Evaluate the robot's motion program to reduce heavy loads or the frequency/intensity of braking if applicable.

5. 5

   Reinitialize the drive bus by performing a Power Off / Power On cycle for the KUKA KRC4 controller.

6. 6

   Check the KUKA KRC4 KSP and KPP modules for internal voltage monitoring and regulation circuit integrity.