DC overvoltage

What does ALARM 7 mean?

The DC-link voltage has exceeded its limit, causing the frequency converter to trip after a certain time. This often occurs due to regenerative braking or excessive mains voltage, which can damage the inverter section if not mitigated.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Change the ramp type to a softer deceleration profile.

2. 4

   Activate appropriate functions in parameter 2-10 Brake Function.

3. 5

   Increase parameter 14-26 Trip Delay at Inverter Fault.