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tami25Sep 2, 2025
What to do if Huawei SUN2000-28KTL Firmware Upgrade Failed?
- ZZachary JenkinsSep 2, 2025
A Firmware Upgrade Failed error on a Huawei Inverter means the upgrade process was incomplete. Upgrade again.
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 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 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.
How to resolve String 1-6 Reverse error on Huawei SUN2000-28KTL Inverter?
If your Huawei Inverter shows 'String 1-6 Reverse', it means the cables between PV arrays are connected reversely during SUN2000 installation. Check whether the cables between PV arrays are connected reversely. If they are connected reversely, reconnect the cables properly.
What does String 1-6 Abnormal mean on Huawei Inverter?
If your Huawei Inverter displays 'String 1-6 Abnormal', this can occur when PV arrays are shielded for a long time or the PV arrays deteriorate. Check whether the output current of a PV array is obviously less than the output current of other PV arrays. If yes, check whether the PV array is shielded. If the PV array is clear and is not shielded, check whether the PV modules are faulty.
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.
What to do if Huawei Inverter shows Invert Module Fault?
The Huawei Inverter indicates an Invert Module Fault when abnormal external conditions trigger converter circuit protection inside the inverter. This could be due to a sharp drop in grid voltage or a short circuit, causing high output current (Reason ID = 4), or the inverter's output short-circuiting (Reason ID = 20). The inverter monitors external conditions and should return to normal once the issue is resolved. Check for any short circuits in the inverter's output cables and fix them.
Why is my Huawei SUN2000-28KTL showing a Grid Voltage Abnormal error?
The grid voltage may be beyond the allowed range. This can happen if the grid A, B, or C phase voltage is less than the allowed range (Reason ID = 1 to 6), or if there's a power outage, a disconnected AC line, or a tripped AC circuit breaker (Reason ID = 29). If it's an accidental grid issue, the Huawei Inverter should automatically return to normal once the problem is resolved. Check if the AC voltage is normal.
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.
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.
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 |
