- Error code
- 205
- Category
- Grid fault
- Manufacturer
- SMA
- Models
- Sunny Tripower (STP)
1What the error means
Codes 202 to 205 belong to the same group of grid events: the grid was disconnected, the AC cable is faulty, or the grid voltage at the point of connection is too low. The inverter disconnects and reconnects automatically once the voltage returns to the permitted range.
2Possible causes
- Grid outage or voltage drop
- Tripped AC fuse or lost phase
- Loose or oxidised connection on the AC cable
- Very long or undersized AC cable
3What to do
- Check the AC fuses and that all three phases reach the inverter.
- Check the AC cable connection at the inverter and in the distribution board.
- If the fault appears frequently while the grid is stable, the inverter's relays and measuring circuit need to be checked.
Same code group
Code 205 belongs to the same group as 202, 204 — they share the same cause and the same remedy.
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.