- Error code
- 009
- Category
- Grid underfrequency
- Manufacturer
- SUNGROW
1What the error means
Grid underfrequency (Grid Under-frequency): the frequency dropped below the lower limit of the grid code.
2Possible causes
- Grid frequency drop
- Weak grid or operation on a generator
- Wrong country setting
3What to do
- Check the country setting and the frequency limits.
- If it appears constantly on a stable grid, 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.