SMA Sunny Boy fault codes

The common domestic single-phase range: Sunny Boy 1.5 to 2.5, Sunny Boy 3.0 to 6.0, and the earlier Sunny Boy 3000TL to 5000TL-21 with a display. All three publish events 3501, 3601 and 3701 with the same meanings; the oldest display models showed the two-digit form, 35, 36 and 37, or the text message Riso. Transformerless, which matters here — SMA warn that transformerless inverters can be damaged by sporadic ground faults occurring during operation.

Codes on the Sunny Boy follow the same SMA scheme as the rest of the range. Where a code behaves differently on this generation, the code page says so.