- Error code
- 6901
- Category
- Input B defective
- Manufacturer
- SMA
- Models
- Sunny Tripower (STP)
1What the error means
Self-diagnosis: a problem on DC input B, i.e. the second MPP tracker. The same applies as for input A — either the string or the inverter's input circuit.
2Possible causes
- Fault in the string on input B
- Fault in MPP tracker B
3What to do
- Measure the string on input B.
- Swap strings A and B to see whether the fault follows the PV generator or stays on the input.
Same code group
Code 6901 belongs to the same group as 6902 — they share the same cause and the same remedy.
4Repair by Aineas
You send the inverter to our lab in Thessaloniki. We diagnose it, inform you of the fault and the cost, and the repair starts only after you approve it. Every inverter is tested under simulated operating conditions before delivery.