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Fronius Primo
- Error Code - 454 - Brief Grid Frequency Error
- Error Code - 456 - Anti-Islanding Function Error
- Error Code - 457 - Grid Relay Stuck
- Error Code - 459 - Error w/ Measuring Signal (Insulation Testing)
- Error Code - 460 - Power Source Error w/ DSP
- Error Code - 461 - Error in DSP data memory
- Error Code - 462 - Error in DC feed-in
- Error Code - 463 - AC Polarity Reversed
- Error Code - 474 - RCMU sensor faulty
- Error Code - 475 - Solar Module Ground