Fox ESS · A major brand in the UK. 17 codes across 2 product families, each taken from the manufacturer’s manuals. Fox ESS technical support ↗
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Type the code on your display or a word from its meaning. Each code opens its own page with what it means, whether it is safe and what you can check.
17 codes
| Code | Meaning | Stops? | Homeowner check? |
|---|---|---|---|
| 10min Volt Fault | The grid voltage is out of range for the last 10 Minutes. | Yes | Yes |
| DCI Fault | DC component is out of limit in output current. | Yes | Yes |
| Grid Freq Fault | Grid frequency out of range. | Yes | Yes |
| Grid Lost Fault | Grid is lost. | Yes | Yes |
| Grid Volt Fault | Grid voltage out of range. | Yes | Yes |
| Ground Fault | The ground connection is failed. | Yes | Yes |
| Inv EEPROM Fault | The inverter eeprom is fault. | Yes | Yes |
| Iso Fault | The isolation is failed. | Yes | Yes |
| Main Relay Open | The grid relay keeps open. | Yes | Yes |
| Meter Lost Fault | The communication between meter and Inverter is interrupted. | No | Yes |
| Over Load Fault | Over load in on grid mode. | Partly | Yes |
| PLL_ OverTime | Three-phase system access single-phase AC. | Yes | Yes |
| Pv Volt Fault | PV voltage out of range. | Partly | Yes |
| PvCon Dir Fault | The PV connection is reversed. | Yes | Yes |
| Res Cur Fault | The residual current is high. | Yes | Yes |
| SW Bus Vol Fault | Bus voltage out of range detected by software. | Yes | Yes |
| Temp Fault | The inverter temperature is high. | Yes | Yes |