- Manufacturer
- KOSTAL
- Models
- Piko
1What the error means
On many Kostal inverters, at around 100,000 kWh, errors appear that are related to the incorrect operation of your inverter.
2Possible solution
Try switching off the grid breaker and switching it back on after 2-3 minutes. If the problem persists, you will need to send us the inverter for repair.
Below is an indicative list of the possible errors that may appear on Kostal inverters.
It is always recommended to consult the user manual of your inverter.
| 106 | Neutral not connected |
| 150 | Frequency fault |
| 151 – 164 | Grid fault at start-up |
| 165 – 178 | Frequency fault |
| 240-241 | AC fault |
| 250 | Grid voltage out of range |
| 251 – 278 | Grid problem |
| 279 – 292 | Phase interruption not correct |
| 300 – 399 | Shutdown due to leakage current |
| 400 – 401 | PV Over Voltage |
| 601 – 615 | Overtemperature |
| 800 – 999 | Internal fault |
3What to do
- Note the code and the inverter model (nameplate on the side of the unit).
- Switch off the grid (AC) breaker and switch it on again after 2–3 minutes.
- If the error returns or keeps recurring, do not keep restarting the unit — contact us for a diagnosis.
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.