- Error code
- 3701
- Category
- Residual current
- Manufacturer
- SMA
- Models
- Sunny Tripower (STP)
1What the error means
The inverter detected a residual current above the permitted level and disconnected immediately, just as an RCD would.
2Possible causes
- Ground fault in the PV generator — moisture or a damaged cable
- Faulty module
- Fault in the inverter's residual current measuring unit
3What to do
- Check the PV generator for a ground fault, especially after rain.
- If the fault also appears with the PV generator disconnected, the fault is in the inverter.
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.