- Error code
- 901
- Category
- Earthing
- Manufacturer
- SMA
- Models
- Sunny Tripower (STP)
1What the error means
The inverter detected that the protective earth (PE) conductor is missing or not correctly connected. Without proper earthing it is not allowed to operate.
2Possible causes
- Disconnected or loose earth conductor
- Oxidised earth contact
- Wiring error
3What to do
- Check the PE conductor at the inverter and in the distribution board.
- Measure the earth continuity.
- If the earthing is correct and the fault remains, check the inverter's 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.