Fronius International GmbH · An established brand in the UK. 64 codes across 2 product families, each taken from the manufacturer’s manuals. Fronius International GmbH technical support ↗
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64 codes
| Code | Meaning | Stops? | Homeowner check? |
|---|---|---|---|
| 102 | AC voltage too high | Yes | Yes |
| 103 | AC voltage too low | Yes | Yes |
| 105 | AC frequency too high | Yes | Yes |
| 106 | AC frequency too low | Yes | Yes |
| 107 | No AC grid | Yes | Yes |
| 108 | Stand-alone operation detected | Yes | Yes |
| 112 | RCMU error | Yes | Yes |
| 240-243 | Arc detection | Yes | Yes |
| 301 | Overcurrent (AC) | Partly | Yes |
| 302 | Overcurrent (DC) | Partly | Yes |
| 303 | Power stage set overtemperature | Partly | Yes |
| 304 | Internal temperature too high | Partly | Yes |
| 306 | LOW PV OUTPUT - intermediate circuit voltage too low for feeding energy into the grid | Partly | Yes |
| 307 | LOW PV VOLTAGE - DC input voltage too low for feeding energy into the grid | Partly | Yes |
| 308 | Intermediate circuit overvoltage | Partly | Yes |
| 309 | DC input voltage MPPT 1 too high | Partly | Yes |
| 313 | DC input voltage MPPT2 too high | Partly | Yes |
| 401 | Unable to communicate with the power stage set | Yes | Yes |
| 406 | Power stage set temperature sensor faulty | Yes | Yes |
| 407 | Internal temperature sensor faulty | Yes | Yes |
| 408 | Direct current feeding in detected | Yes | Yes |
| 415 | Safety cut-out via option card or RECERBO has triggered | Yes | Yes |
| 416 | No communication possible between power stage set and control system | Yes | Yes |
| 417 | Hardware ID problem | Yes | Yes |
| 425 | Unable to communicate with the power stage set | Yes | Yes |
| 431 | Software problem | Yes | Yes |
| 436 | Functional incompatibility (PC boards not compatible, e.g. after board replacement) | Yes | Yes |
| 438 | Functional incompatibility (PC boards not compatible) | Yes | Yes |
| 443 | Intermediate circuit voltage too low or asymmetric | Yes | Yes |
| 445 | Impermissible limit value settings | Yes | Yes |
| 447 | Insulation fault | Yes | Yes |
| 448 | Neutral conductor not connected | Yes | Yes |
| 451 | Memory error detected | Yes | Yes |
| 452 | Communication error between the processors | Yes | Yes |
| 453 | Short-term grid voltage error | Yes | Yes |
| 454 | Short-term grid frequency error | Yes | Yes |
| 456 | Anti-islanding function is no longer being implemented correctly | Yes | Yes |
| 457 | Grid relay sticking | Yes | Yes |
| 463 | Reversed AC polarity, AC connector inserted incorrectly | Yes | Yes |
| 474 | RCMU sensor faulty | Yes | Yes |
| 475 | Solar module ground, insulation fault (connection between solar module and earth) | Yes | Yes |
| 479 | Intermediate circuit voltage relay is switched off | Yes | Yes |
| 482 | Start-up incomplete | Yes | Yes |
| 485 | CAN transmit buffer is full | Yes | Yes |
| 489 | Permanent overvoltage on intermediate circuit capacitor (five 479 status codes in a row) | Yes | Yes |
| 502 | Insulation error on the solar modules | No | Yes |
| 509 | No energy fed into the grid in the past 24 hours | No | Yes |
| 515 | Unable to communicate with filter | No | Yes |
| 517 | Power derating caused by too high a temperature | Partly | Yes |
| 522 | DC low String 1 | No | Yes |
| 523 | DC low String 2 | No | Yes |
| 560 | Power derating caused by overfrequency | Partly | Yes |
| 566 | Arc detector switched off (e.g. during external arc monitoring) | No | Yes |
| 710 | Solar Net - Keep alive signal missing | No | Yes |
| 751 | Time lost | No | Yes |
| 757 | Hardware error in the Real Time Clock module | Yes | Yes |
| 766 | Emergency power limitation has been activated (max. 750 W) | Partly | Yes |
| 1001 | After 24 hours of continuous feed-in an insulation measurement must be carried out. | Partly | Yes |
| 1024 | A configuration change requires a restart. | Partly | Yes |
| 1030 | A device in the WSD (wired shutdown) chain has interrupted the signal line (e.g. surge protection device tripped) or the factory bypass was removed without a trigger device; operating LED flashes red. | Yes | Yes |
| 1036 | When connecting to the public grid the grid frequency was exceeded. | Yes | Yes |
| 1112 | Grid voltage exceeds the stored limit value so the inverter reduces power. | Partly | Yes |
| 1175 | Insufficient sunlight / poor weather. | Partly | Yes |
| 1196 | Only appears when starting for the first time. | No | Yes |