What can cause an InFU error 30 fault on the ATV630 and ATV930 Process drives?

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What can cause an InFU, Internal Error 30, fault on the ATV630 and ATV930 Process drives?

Issue:
What are InFU error 30 fault causes on the ATV630 and ATV930 Process drives.

Product Line:
ATV630 and ATV930 Process drives

Cause:
Internal error 30 means communication between inverter brick and rectifier brick

Resolution:

InFU

[Internal Error 30]

Internal Error 30
Principle
Internal soft charge error. The communication and the state of the rectifierbrick (snubber board) is monitored by the inverter brick. In case of an communication interruption or wrong state (blocking/charging/diode mode) of the rectifier this error occurs.
Probable cause
- The communication cable between the Rectifer and Inverter Brick is interrupted
- Status of the rectifier (blocking/charging/diode modus) does not match with the command of the inverter brick.
Remedies
- Check communication cable between Inverter and Rectifier Brick.
- Check the mains voltage, the Fuses are OK
- Change the rectifier brick