- Error code
- Bfr-Srr
- Category
- Internal fault
- Manufacturer
- SMA
- Models
- Sunny Boy (SB)
1What the error means
An indication on the older Sunny Boy models: the grid monitoring circuit gave contradictory readings before (Bfr) and during (Srr) operation. It points to an internal problem in the measurement or the relays.
2Possible causes
- Fault in the grid voltage measuring circuit
- Faulty grid relays
3What to do
- Restart with AC and DC switched off.
- If it returns, the inverter needs to be checked in our lab.
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.