Siemens F29007 fault code meaning

Series: G220

Infeed: Power unit positive/negative DC bus imbalance

converter

Meaning: An imbalance exceeding the permissible range has occurred between the capacitor sections in the DC bus. The fault can only be acknowledged once the imbalance has completely disappeared. This occurs automatically when the equipment is switched off, but may require a waiting time of several minutes. This fault occurs under the following conditions: - Unbalanced mains voltage dips, interruptions, or overvoltage (possibly very brief, lasting only a few milliseconds). - A strongly oscillating load on the DC bus at the mains frequency or a multiple of the mains frequency. - Damaged equipment.

Possible causes

Source: SINAMICS G220 Converter P1407