Event 6901
 Qualified person
Qualified person
Event message:
- Self-diagnosis > Input B defective 
Explanation:
Polarity error on the inverter.
Corrective measures:
- Check whether a string is connected to input B. 
- Contact Service. 
 Qualified person
Qualified person
Event message:
Self-diagnosis > Input B defective
Explanation:
Polarity error on the inverter.
Corrective measures:
Check whether a string is connected to input B.
Contact Service.