Huawei inverter error codes
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The following are some codes you may get from a Huawei inverter, which are called AlarmIDs.
| Type of Issue | Common Error Codes | Overview |
| Grid voltage and frequency disturbances | 301 – Abnormal grid voltage 305 – Abnormal grid frequency | Grid disturbances are temporary, and the inverter returns to normal when voltage and frequency stabilise. However, you should get technical support if the inverter shows these faults when the grid is providing adequate voltage and frequency. |
| Overcurrent and other faults | 103 – High DC input voltage 106-113 – Abnormal operation of solar panel string circuits (1-8) 120-127 – Reverse connection of solar panel string circuits (1-8) 200 – Abnormal DC circuit 202 – Abnormal inverter circuit 313 – Low insulation resistance 326 – Abnormal grounding 400 – System fault 412 – DC arc fault | These may occur as isolated events, but they may also indicate issues that need technical attention. 103 may be triggered by having too many modules in the same circuit. 106-113 may indicate shaded or damaged panels. 412 can be caused by loose wiring in the photovoltaic array |
| Temperature issues | 321 – Cabinet temperature high | Can be caused by placing the inverter in a poorly ventilated location, or by fan malfunctions. |
| Software issues | 504 – Wrong software version 505 – Failed upgrade 506 – Expired license | Upgrade the software as needed, you can repeat the upgrade when getting 505. |
Huawei inverters will also display codes (Alarm ID) for memory issues, failed internal tests, measurement issues, etc. Many error codes are one-time events, but you should get technical support if there are constant issues – especially if you get the same Alarm ID many times.
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