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 Residual Current Abnormal mean on Huawei Inverter?
If your Huawei Inverter displays 'Residual Current Abnormal', it indicates that the insulation resistance against the ground at the input side has become lower, causing excessively high residual current. If the fault occurs accidentally, the SUN2000 automatically recovers to the normal operating status after the fault is rectified. If the fault occurs repeatedly and lasts a long time, check the insulation resistance against the ground of PC arrays is excessively low.
What causes Cabinet Over-Temp on a Huawei SUN2000 Inverter?
If your Huawei Inverter displays 'Cabinet Over-Temp', it means the operating temperature of the UNS2000 exceeds the upper limit. Improve ventilation to decrease the temperature.
How to troubleshoot Low Array Insulation Resistance on a Huawei SUN2000?
If your Huawei Inverter displays 'Low Array Insulation Resistance', it means the insulation resistance against the ground for PV arrays is less than the minimum value. You should: 1. Check the insulation resistance against the ground for the outputs of PV arrays. If a short circuit occurs, rectify the fault. 2. If the insulation resistance against the ground is less than the default value in a rainy environment, set the insulation resistance threshold.
What causes Invert Module Fault in Huawei SUN2000?
If your Huawei Inverter displays 'Invert Module Fault', it indicates a protection activation for the inversion circuit inside the SUN2000 due to abnormal external conditions. 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. If the Reason ID is 20, check whether the inverter output cable is short-circuit.
What to do if Huawei Inverter shows System Fault?
If your Huawei SUN2000 Inverter reports a 'System Fault', it indicates an unrecoverable fault within the inverter's internal circuitry. To attempt a fix, flip the DC switch on the SUN2000 to the OFF position, wait for 5 minutes, and then flip the DC switch back to the ON position. Check if the fault clears.
Why does my Huawei Inverter show Frequency Abnormal?
If your Huawei Inverter displays a 'Frequency Abnormal' error, it means that the actual frequency of the grid is higher than the local grid standards requirements. 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 frequency is within the acceptable range. If it is not, contact your local power operator. If the frequency is within range, you may need to change the power grid overfrequency and underfrequency protection points after obtaining approval from the local power operator.
What to do if Huawei SUN2000 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.
General| Model | SUN2000 |
|---|---|
| Efficiency | Up to 98.6% |
| MPPT | Yes |
| Max Input Voltage | 1100V |
| Number of MPPTs | 2 |
| Operating Temperature | -25°C to +60°C |
| Protection Level | IP65 |
| Communication | RS485 |
| Nominal Output Voltage | 230V/400V |
Describes the SUN2000 in terms of installation, electrical connections, commissioning, maintenance, and troubleshooting.
Specifies the target users for this manual, including PV plant operation personnel and qualified electrical technicians.
Defines the various symbols used in the document to convey important safety and operational information.
Outlines the qualifications and training required for personnel performing operations on Huawei products.
Advises against damaging or scrawling labels on the SUN2000 enclosure, as they contain important safety information.
Provides initial safety instructions for the installation process, including powering off the device.
Details safety warnings and requirements before making electrical connections to prevent shock or fire.
Highlights safety precautions related to operating the SUN2000, including high voltage warnings.
Covers safety precautions to be followed before and during maintenance or replacement of SUN2000 components.
Introduces the SUN2000 as a single-phase grid-tied PV string inverter that converts DC to AC power.
Describes the physical appearance, LED indicators, labels, and ports of the SUN2000 enclosure.
Explains the conceptual diagrams and working modes (Standby, Operating, Shutdown) of the SUN2000.
Details the steps for checking outer packing materials and package contents before installing the SUN2000.
Lists the necessary tools and instruments required for the installation of the SUN2000.
Provides requirements for selecting an appropriate installation location based on basic, environmental, and structural needs.
Guides on how to install the mounting bracket for both wall-mounted and support-mounted installations.
Outlines the procedure for physically mounting the SUN2000 unit onto the installed bracket.
Explains the optional procedure for installing a SIM card to enable the 4G function of the SUN2000.
Describes the networking application and provides figures for cable connections.
Details the procedure for installing pipe fittings to route cables through the SUN2000 enclosure.
Provides instructions for connecting the AC output power cable for both home load and critical load.
Guides on how to safely connect the PV input power cables to the SUN2000, including prerequisites and warnings.
Explains the procedure and safety precautions for connecting the battery cables to the SUN2000.
Details how to connect signal cables, including COM port definitions and routing procedures.
Describes the procedure for installing the 4G or WLAN antenna for the SUN2000.
Presents a checklist of items to verify before powering on the system for the first time.
Provides a step-by-step guide for powering on the SUN2000 system, including prerequisites and LED status checks.
Details the procedures for safely powering off the SUN2000 system, including warnings about residual electricity.
Explains how to configure and perform automatic or manual switching between grid-tied and backup modes.
Introduces the FusionHome app's function, connection methods, and system requirements.
Guides on how to download and install the FusionHome app on Android and iOS devices.
Explains the prerequisites and procedures for connecting the mobile phone to the SUN2000 via WiFi, directly or through a router.
Covers installer-specific operations within the FusionHome app, including login, quick settings, and device management.
Details user-specific operations in the FusionHome app, such as logging in, querying status, and managing settings.
Provides common faults and troubleshooting measures for issues encountered with the FusionHome app.
Outlines regular maintenance checks for the SUN2000 to ensure long-term proper operation.
Provides detailed instructions for replacing the power compartment of the SUN2000, including prerequisites and step-by-step procedures.
Lists alarm severity levels and provides guidance on common alarms and their troubleshooting steps.
Details the procedure for safely removing the SUN2000 unit and its mounting bracket from the installation site.
Provides instructions on how to pack the SUN2000 for storage or transportation, using original or alternative packaging.
Advises on the proper disposal of the SUN2000 at the end of its service life according to local regulations.
Lists the maximum and CEC efficiency ratings for different SUN2000 models at 240V.
Details the input specifications for various SUN2000 models, including current, voltage, and number of inputs.
Provides technical specifications for the grid-tied output of different SUN2000 models, such as rated power, voltage, and frequency.
Lists the technical specifications for the backup output of SUN2000 models, including voltage, frequency, and apparent power.
Outlines the various protection standards and certifications applicable to the SUN2000.
Specifies the adjustable utility interconnection voltage and frequency trip limits and their clearing times.
Details the communication capabilities of the SUN2000, including display, WiFi, and RS485 support.
Summarizes common parameters like topology, ingress protection rating, cooling mode, dimensions, weight, operating temperature, and humidity.
Lists various grid codes applicable to US low-voltage power grids, including their description, output mode, voltage, and frequency.
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