Enphase Energy · An established brand in the UK. 12 codes across 2 product families, each taken from the manufacturer’s manuals. Enphase Energy 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.
12 codes
| Code | Meaning | Stops? | Homeowner check? |
|---|---|---|---|
| ac-frequency-out-of-range | Microinverter reports grid frequency too low or too high for the grid profile. | Yes | Yes |
| ac-voltage-out-of-range | Microinverter reports grid AC voltage too low or too high for the configured grid profile; it stops exporting until voltage is back in range. | Yes | Yes |
| critical-temperature | Microinverter internal temperature exceeds rated range; it reduces power until it cools. | Partly | Yes |
| dc-resistance-low-power-off | Microinverter insulation-resistance sensor measured PV+ or PV- to earth below ~7 kOhm; it stops producing and shows solid red LED. | Partly | Yes |
| dc-voltage-too-high | Microinverter reports DC input voltage from the PV module is too high. | Partly | Yes |
| dc-voltage-too-low | Microinverter detects DC input voltage from the PV module is too low. | Partly | Yes |
| device-produced-no-power | Microinverter produced 0 W for more than 24 hours. | Yes | Yes |
| gateway-failure | The Envoy has detected a software problem. | No | Yes |
| gateway-not-reporting | The Envoy/IQ Gateway is not communicating with Enphase servers; production data is stored and uploaded when the connection returns. | No | Yes |
| gfi-tripped | Ground fault (GFDI) detected by older M215/M190/D380/M210/M200/M175 microinverters; solid red LED. | Partly | Yes |
| grid-gone | Microinverter reports power from the utility is no longer present or out of voltage/frequency specification (anti-islanding). | Yes | Yes |
| microinverter-failed-to-report | Microinverter cannot communicate with the Envoy/IQ Gateway over the AC power lines (power-line communication). | No | Yes |