I have this Sinamics module:BLM 6SL3330-1TE 380-480V >=530A and I have a problem about F30002 :DC-link overvoltage.
When I start blm, the power switch on and immediately switch off with fault F30002.
I note, on BLM that work correctly, that when the blm is off, on the DC-bus i must have about 24 v dc (someone knows why???).
In this case on DC-BUS there is 0 V ( I test with digital multimeter), but if i see the parameter r26 (voltage on DC-BUS) on Starter the value is 207V.
To test this measure I put 24V DC on DC BUS with an external power supply and the parameter r 26 it was 340V (with multimeter I measure 24V).
Probabily the damage was caused by an fast stop of the 5 motor under this DC-BUS at the same. time.
I reset all the parameter on BLM but the parameter r26 is never correct and this fact, when I switch on BLM causes the fault F30002.
I think that the sensor for voltage measure on BUS is fault down, what I can do? there is really a sensor (an hardware parts) that do this measure? The damage can be also on other part of the module? How can I replace this sensor or the hardware damage?