Overvoltage in the DC bus

What does it mean?

The DC-bus voltage exceeds the switch-off threshold set in C0173.

Common causes

• Braking energy is too high — the DC-bus voltage is higher than the value set in C0173.

How to fix it

• Use a braking unit or regenerative module, and check the brake resistor dimensioning.

After troubleshooting: de-energise the device completely (disconnect the 24 V supply and discharge the DC bus) before opening the covers.