- Error code
- 203
- Category
- Grid fault
- Manufacturer
- SMA
- Models
- Sunny Tripower (STP)
1What the error means
Event number 203 indicates that the grid voltage at the connection point of the inverter is too low. Possible causes may be power outages in the utility grid or a fault in the AC installation. The inverter disconnects from the utility grid for safety reasons. Once the grid voltage returns to the permitted range, the inverter reconnects automatically after the grid monitoring time specified in the country standard. Detailed background information on the possible reasons for feed-in interruptions due to grid incidents can be found in the diagnosis
2What 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.
3Repair 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.