DC link voltage too high

What does 07 mean?

The DC link voltage has exceeded its permissible limit. Potential causes include a ramp time set too short, incorrect wiring or internal resistance of the brake coil/braking resistor, thermal overload in the braking resistor, or an invalid mains voltage range. High DC link voltage poses a risk to the inverter's components.

• DC link voltage exceeds maximum safe operating level.
• Regenerative braking energy exceeding capacity.
• Faulty braking resistor or chopper circuit.
• Parameter P0256 (DC link voltage limit) set too high.
• Incoming AC voltage too high.

Click steps to track your progress.

1. 1

   Increase the ramp time setting in the inverter parameters.

2. 2

   Check the connection between the braking resistor and the brake coil and correct it.

3. 3

   Check the internal resistance of the brake coil/braking resistor, referring to the "Technical Data" section of the manual for expected values.

4. 4

   Check the mains voltage to ensure it is within the valid operating voltage range for the unit.

5. 5

   Reset the fault by switching off the DC 24 V supply voltage.