- Error code
- 165–178
- Category
- Grid overfrequency
- Manufacturer
- KOSTAL
- Models
- Piko / Plenticore
1What the error means
Frequency fault. The grid frequency went out of range and the inverter disconnected. Codes 165 to 178 concern the same fault at different monitoring stages.
2Possible causes
- Grid frequency instability
- Operation on a generator or a weak grid
- Wrong country setting
3What to do
- Check the country setting and the frequency limits in the parameters.
- Note whether it coincides with specific hours or with generator operation.
- If the grid is stable and the fault persists, check the measuring circuit.
Codes covered
This fault appears with the codes 165–178. 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.