Sigenergy · An established brand in the UK. 31 codes across 1 product family, each taken from the manufacturer’s manuals. Sigenergy 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.
31 codes
| Code | Meaning | Stops? | Homeowner check? |
|---|---|---|---|
| 1001 | The software version does not match. Official suggestion (summarised): Upgrade again; if unsuccessful submit fault feedback in app. | Partly | Yes |
| 1002 | Low insulation resistance. Official suggestion (summarised): Check DC cables for shorts/breaks and poles shorted to ground; if only on rainy days re-check when dry; check ISO impedance protection setting in app meets local rules. | Yes | Yes |
| 1003 | Over-temperature. Official suggestion (summarised): Restarts after temperature normal; improve ventilation/shade if repeated. | Yes | Yes |
| 1004 | Equipment fault. Official suggestion (summarised): Standby/shutdown, open DC and AC switches, wait until fully powered down, restore and boot; if not cleared submit fault feedback. | Yes | Yes |
| 1005 | System grounding fault. Official suggestion (summarised): Check protective earth connection. | Yes | Yes |
| 1006 | PV string overvoltage. Official suggestion (summarised): Measure string voltage; reduce modules per string per spec. | Partly | Yes |
| 1007 | PV string reversely connected. Official suggestion (summarised): Wait until string current <0.5 A, open DC switch, correct polarity. | Partly | Yes |
| 1008 | PV string sinking current. Official suggestion (summarised): Check module count per string, shading/soiling, orientation. | Partly | Yes |
| 1009 | AFCI fault. Official suggestion (summarised): Open PV DC switch, inspect for damage/poor contact/burn marks, repair, close DC switch and clear AFCI fault in app. | Yes | Yes |
| 1010 | Grid power outage. Official suggestion (summarised): Reconnects automatically when grid normal; check AC switch/breaker; confirm off-grid function enabled; ID2 clear manually in app alarm page after checking site. | Yes | Yes |
| 1011 | Grid overvoltage. Official suggestion (summarised): Auto reconnect; if repeated measure grid voltage and contact DNO; change protection value only with DNO consent. | Yes | Yes |
| 1012 | Grid undervoltage. Official suggestion (summarised): Auto reconnect; measure grid voltage; check protection settings. | Yes | Yes |
| 1013 | Grid overfrequency. Official suggestion (summarised): Auto reconnect; check frequency and settings. | Yes | Yes |
| 1014 | Grid underfrequency. Official suggestion (summarised): Auto reconnect; check frequency and settings. | Yes | Yes |
| 1015 | Grid voltage imbalance. Official suggestion (summarised): Auto reconnect; measure phase voltages; contact power company. | Yes | Yes |
| 1016 | DC component of output current out of limit. Official suggestion (summarised): Usually self-clears; if frequent contact service. | Yes | Yes |
| 1017 | Leak current out of limit. Official suggestion (summarised): Usually self-clears after environment stabilises; if frequent contact service. | Yes | Yes |
| 1018 | Communication fault. Official suggestion (summarised): ID1 top up 4G/reseat dongle; ID2 restart; ID3/ID4 check comms ports. | Partly | Yes |
| 1019 | Internal protection. Official suggestion (summarised): Self-clears; contact service if frequent. | Yes | Yes |
| 1020 | Abnormal AFCI self-checking circuit. Official suggestion (summarised): As 1009: open DC switch, inspect, repair, clear AFCI fault in app. | Yes | Yes |
| 1021 | Inverter AC side voltage abnormal. Official suggestion (summarised): Reduce load; check for short circuits; check gateway inverter-side breaker. | Yes | Yes |
| 1022 | Manual operation protection. Official suggestion (summarised): After confirming no hazard, reset the emergency stop button. | Yes | Yes |
| 1023 | Neutral line abnormality in inverter. Official suggestion (summarised): Shut down, isolate grid, check/reconnect neutral. | Yes | Yes |
| 1024 | Abnormal phase sequence. Official suggestion (summarised): Correct AC wiring sequence. | Yes | Yes |
| 1025 | Short circuit to PE. Official suggestion (summarised): Check for phase-earth short. | Yes | Yes |
| 1026 | Soft start failure. Official suggestion (summarised): Self-clears; contact service if frequent. | Yes | Yes |
| 1027 | Grid frequency unstable. Official suggestion (summarised): Self-clears; contact DNO if frequent. | Yes | Yes |
| 1028 | Built-in GATEWAY device failure. Official suggestion (summarised): Shutdown, isolate grid switch, restore and power on; submit report if persists. | Yes | Yes |
| 1029 | Built-in GATEWAY wiring abnormal. Official suggestion (summarised): Swap two phases at grid input; inspect load wiring. | Yes | Yes |
| 1030 | Built-in GATEWAY load failure. Official suggestion (summarised): Wait for load to normalise (auto recovers); check load and inverter wiring. | Partly | Yes |
| 1031 | Built-in GATEWAY port overcurrent. Official suggestion (summarised): Reduce load; equalise cable lengths in parallel systems. | Partly | Yes |