- Error code
- 501
- Category
- Grid fault
- Manufacturer
- SMA
- Models
- Sunny Tripower (STP)
1What the error means
The grid frequency was found outside the permitted range defined by the country setting. The inverter disconnects and reconnects automatically once the frequency stabilises.
2Possible causes
- Grid frequency instability
- Operation on a generator or a weak grid
- Wrong country setting
3What to do
- Check the country setting in the inverter's parameters.
- If the fault appears constantly while the grid is stable, check the measuring circuit.
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.