Siemens A0912 fault code meaning

Siemens / A0912

Series: MM430

DC circuit minimum

converter

Meaning:

Possible causes

Source: 430 P90

Series: MM440

Vdc_max controller active

converter

Meaning: If the DC link voltage (r0026) falls below the minimum value (see r0026~P1240), the Vdc_max controller is activated. The motor's kinetic energy supports the DC link voltage, causing the drive to decelerate. This prevents brief power supply failures from causing an undervoltage trip.

Possible causes

Source: Parameter List_ MICROMASTER 440 P322

Series: V10

Vdc-min controller active

converter

Meaning:

Possible causes

Source: SINAMICS V10 P100