Self-diagnosis > Input B defective

What does 6901 mean?

The inverter's self-diagnosis has detected a polarity error on input B. This means a PV string connected to input B has incorrect polarity, which can prevent proper operation and potentially damage the inverter.

• Incorrect polarity of a PV string connected to input B.

Click steps to track your progress.

1. 1

   Check whether a string is connected to input B and verify its polarity.