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Alexis CaseSep 2, 2025
What to do if Huawei SUN2000-12KTL Inverter Firmware Upgrade Failed?
- MMary FrancisSep 2, 2025
A Firmware Upgrade Failed error on a Huawei Inverter means the upgrade process was incomplete. Upgrade again.
What to do if Huawei SUN2000-12KTL Inverter 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 SUN2000-12KTL 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 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 SUN2000-12KTL?
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 SUN2000-12KTL?
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 SUN2000-12KTL?
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 SUN2000-12KTL 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 SUN2000-12KTL Inverter 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 SUN2000-12KTL Inverter?
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 SUN2000-12KTL?
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| Max. Efficiency | 98.6% |
|---|---|
| Rated AC Power Output | 12, 000 W |
| Dimensions (W x H x D) | 525 x 470 x 262 mm |
| Weight | 25 kg |
| Operating Temperature Range | -25°C to +60°C |
| Protection Rating | IP65 |
| Max. Input Voltage | 1100 V |
| Number of MPPT Trackers | 2 |
| Max. Input Current per MPPT | 22 A |
| Cooling Method | Natural Convection |
| Max. apparent AC power | 12000 VA |
| MPPT Voltage Range | 200 V to 1, 000 V |
| Rated AC Voltage | 220 V / 380 V, 230 V / 400 V, 240 V / 415 V |
| Warranty | 5 years |
Outlines the document's scope for SUN2000 installation, operation, and maintenance.
Specifies target readers as PV plant operators and qualified electrical personnel.
Defines symbols used in the manual for safety and operational clarity.
States that only qualified technicians should operate the SUN2000.
Warns against tampering with warning signs and nameplates on the unit.
Details precautions for safe installation, including clearance and disconnection.
Covers safety during electrical connections, including grounding and isolation.
Emphasizes safety during operation, especially regarding high voltage and hot surfaces.
Outlines safety measures before and during maintenance tasks.
Introduces the SUN2000, its functions, models, and applications.
Describes the SUN2000's role in grid-tied PV power systems.
Explains the different power grid modes supported by the SUN2000.
Details the physical appearance and external dimensions of the SUN2000.
Identifies and describes the ports on the bottom of the SUN2000.
Explains the meaning of symbols and labels on the SUN2000 and its nameplate.
Describes the information found on the SUN2000 nameplate.
Introduces the monitoring panel, including LCD, indicators, and buttons.
Explains the content and functionality of the LCD screen.
Describes the status indicated by the SUN2000's LED indicators.
Details the function of each button on the monitoring panel.
Explains the internal circuit diagrams and operational modes of the SUN2000.
Provides context and initial checks before starting the installation process.
Guides on verifying delivered components after unpacking.
Lists the necessary tools for installation and cable connections.
Specifies requirements for selecting an appropriate installation location.
Details the steps for mounting the SUN2000 using a support bracket.
Outlines the steps for securely mounting the SUN2000 onto a wall.
Explains how to connect the protection ground (PGND) cable for safety.
Guides on connecting the AC output power cables to the grid.
Details how to connect DC input power cables from PV strings.
Covers connecting USB and RS485 communication cables.
Lists checks required to ensure proper SUN2000 operation before powering up.
Describes the procedure for powering on the SUN2000.
Guides on setting essential parameters like language, time, and grid code.
Shows the structure of the monitoring menus accessible via the LCD.
Explains how to view system status and data on the monitoring panel.
Details how to access daily, monthly, yearly, and historical energy data.
Guides on accessing and managing active and historical alarm records.
Explains how to configure the system's date and time settings.
Details the process for changing the display language of the monitoring panel.
Describes how to adjust the LCD contrast for better visibility.
Guides on setting currency and the rate for revenue calculation.
Explains how to change user passwords for system security.
Covers configuring RS485 parameters like address, protocol, and baud rate.
Details how to configure protection parameters for the SUN2000.
Explains how to set various functional parameters like LVRT and power limit.
Guides on configuring isolation parameters for grounded PV strings.
Describes how to manually start and stop the SUN2000 via the panel.
Explains how to reset all configured parameters to their factory defaults.
Details how to enable USB functions for firmware upgrades and data export.
Guides on clearing energy yield data and historical alarms.
Explains how to clear active and historical alarm records.
Describes the procedure to reset the entire system, causing a shutdown and restart.
Guides on how to check the SUN2000's model, firmware version, and SN.
Provides safety procedures for powering down the SUN2000 for maintenance.
Outlines regular checks and cleaning for optimal SUN2000 performance.
Lists common faults, their causes, and measures to rectify them.
Details the steps for safely removing the SUN2000 from its installation.
Guides on how to pack the SUN2000 for transport or storage.
Provides guidance on the proper disposal of the SUN2000 unit.
Lists the maximum and European efficiency ratings for different models.
Details input voltage, current, power, and MPPT parameters.
Lists rated active power, apparent power, voltage, current, and THD.
Summarizes the protection mechanisms implemented in the SUN2000.
Covers display types and communication interfaces like RS485.
Provides physical dimensions, weight, operating environment, and terminal details.
