Fault - 7902 Siemens

Check if your system is using:

Search the parameter (fault value) after the fault occurs – that often contains the subcode. fault 7902 siemens

Fault 7902 is rarely a "false alarm." It usually stems from one of the following root causes: Check if your system is using: Search the

If you are absolutely sure it's (not F07902), please provide: an earth fault

Restoring an older backup onto newer firmware breaks the safety checksum.

In the majority of Siemens inverter documentation, Fault 7902 indicates that the drive has detected an internal hardware issue or a severe output stage anomaly that cannot be resolved by standard parameter adjustments. It often signifies that the Inverter Power Module (PM) has detected a short circuit, an earth fault, or an internal component failure (IGBT failure).