Event 6902
Qualified person
Event message:
Self-diagnosis
Input B defective
Explanation:
The inverter has detected an error at DC input B.
Corrective measures:
Disconnect the inverter from voltage sources and wait 15 minutes before recommissioning the inverter.
Check DC input B on the inverter for correct connection.
If the event message persists after the corrective measures, the device needs to be replaced.
Only regarding new installations: Check whether the cables on DC input B are properly connected. Ensure that no reverse polarity is present.