What does DC Bus Voltage Fault mean on a Huawei Inverter?
If your Huawei Inverter shows 'DC Bus Voltage Fault', it means abnormal external conditions trigger the protection for the DC circuit inside the SUN2000. The SUN2000 detects its external working conditions in real time, and therefore the SUN2000 automatically recovers to the normal operating status after the fault is rectified.
What does Frequency Abnormal mean on a Huawei SUN2000-28KTL Inverter?
The Huawei Inverter displays a Frequency Abnormal error when the grid's actual frequency is higher or lower than the required value for the local grid. If this alarm occurs accidentally, it's possible there's an issue with the grid. The inverter will automatically revert to normal once the problem is resolved.
How to troubleshoot Low Array Insulation Resistance on Huawei SUN2000-28KTL Inverter?
The Huawei Inverter shows a Low Array Insulation Resistance error when the insulation resistance against ground of the PV strings is low, possibly due to a short circuit between PV strings and the ground. Check the insulation resistance against the ground of the PV strings and rectify any short circuit.
What does String 1-6 Reverse mean on Huawei SUN2000-28KTL?
The Huawei Inverter shows 'String 1-6 Reverse' when the cables between PV strings were connected in reverse during installation. Check if the cables between PV strings are correctly connected and reconnect them if necessary.
What causes Electrical Grounding Fault on Huawei SUN2000-28KTL?
If your Huawei Inverter displays 'Electrical Grounding Fault', it could be due to the neutral wire and ground cable not being connected to the SUN2000, or when grounding PV arrays, the isolation transformer is not connected to the SUN2000 at the output side. Ensure the neutral wire and ground cable are properly connected. Also, when PV arrays are grounded, check whether the SUN2000 needs to connect to an isolation transformer at the output side and connect the transformer to the SUN2000 if needed.
What causes Flash Fault on a Huawei Inverter?
If your Huawei Inverter displays 'Flash Fault', it could be due to a lack of Flash space or bad blocks in the Flash memory, indicating a device problem. Replace monitor board. If the monitor board and equipment are one, replace the entire monitor equipment.
Why is my Huawei Inverter showing Cabinet Overtemperature?
If your Huawei SUN2000 Inverter is showing a Cabinet Overtemperature warning, check the ventilation and ambient temperature around the installation location. If ventilation is poor or the temperature is too high, improve the ventilation and heat dissipation.
What to do if Huawei Inverter shows Grid Voltage Abnormal?
If your Huawei Inverter shows a 'Grid Voltage Abnormal' error, it indicates that the voltage of the power grid is beyond the acceptable range. If this occurs accidentally, the SUN2000 will automatically recover to normal operation once the grid stabilizes. However, if the alarm repeats, verify that the grid voltage is within the acceptable range. If it is not, contact your local power operator. If the voltage is within range, you may need to change the power grid overvoltage and undervoltage protection points after getting approval from the local power operator.
What to do if Huawei SUN2000-28KTL Firmware Upgrade Failed?
A Firmware Upgrade Failed error on a Huawei Inverter means the upgrade process was incomplete. Upgrade again.
What to check for Electrical Grounding Fault on Huawei SUN2000-28KTL Inverter?
An Electrical Grounding Fault on the Huawei Inverter indicates that the neutral wire or PGND cable is not properly connected to the inverter. Ensure that the neutral wire and PGND cable are correctly connected.
General| Model | SUN2000-28KTL |
|---|---|
| Rated Output Power | 28 kW |
| Max. Input Voltage | 1100 V |
| MPPT Voltage Range | 200 V - 1000 V |
| Number of MPPT Trackers | 2 |
| Max. Input Current per MPPT | 26 A |
| Rated AC Voltage | 400 V |
| Rated Output Voltage | 400 V |
| Output Frequency | 50 Hz / 60 Hz |
| Max. Efficiency | 98.6% |
| Protection Degree | IP65 |
| DC Connection | MC4 |
| Maximum Output Power | 28 kW |
| Power Factor Adjustment Range | 0.8 leading ... 0.8 lagging |
| Operating Temperature Range | -25 °C to 60°C |
| Cooling | Natural cooling |
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