Cause : Thyristor Control Board error comes when the Thyristor Control Board (TCB) of the Basic Line Module signals a fault. There is no line supply voltage or the line contactor is not closed.

F30006 fault in siemens 6RA80 DC Drive indicate Thyristor Control Board error. This means there is an internal fault in the Thyristor Control Board.

1. Check the line supply voltage
2. Check or energize the line contactor.
3. Check the monitoring time and, if required, increase (p0857).
4. If required, observe additional power unit messages/signals.
5. Check the DC link regarding short-circuit or ground fault.
6. Evaluate diagnostic LEDs for the Thyristor Control Board.