- Error code
- 7702
- Category
- Relay fault
- Manufacturer
- SMA
- Models
- Sunny Tripower (STP)
1Possible solution
A common fault on SMA inverters is 7702. It indicates a fault in the relays. 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.
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.