Huawei inverter error codes
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.