- Error code
- FS 41 – FS 46
- Category
- Phase failure
- Manufacturer
- KACO
1What the error means
Grid feed-in is not possible. The display shows which phase has the problem — codes FS 41 to FS 46 correspond to the phases and the limits that were violated.
On the display or in the monitoring software it appears as FS 41 – FS 46.
2Possible causes
- One phase missing or interrupted
- Tripped fuse on one phase
- Unbalanced grid
3What to do
- Measure all three phases at the inverter.
- Check the fuses on each phase.
- If all three phases are normal, check the measuring circuit.
Codes covered
This fault appears with the codes FS 41 – FS 46. The manufacturer documents them as a single fault — the number indicates the stage or the phase in which it was detected.
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.