How to troubleshoot Power grid phase wire short-circuit to PE on Huawei SUN2000-20KTL-M2?
If your Huawei Inverter reports 'Power grid phase wire short-circuit to PE', it means the impedance of the output phase wire is low or short-circuited to PE. Check the impedance of the output phase wire to PE, locate the position with lower impedance and restore that.
What does Unstable Grid Frequency mean on my Huawei SUN2000-20KTL-M2 Inverter and how can I resolve it?
If your Huawei Inverter displays 'Unstable Grid Frequency,' it indicates that the grid frequency change rate does not comply with the local power grid standard. Here’s what you should do: 1. If the alarm occurs occasionally, the power grid may be temporarily abnormal. The SUN2000 automatically recovers after detecting that the power grid becomes normal. 2. If the alarm occurs frequently, check whether the power grid frequency is within the acceptable range. If not, contact the local power operator.
What causes Grid Underfrequency on a Huawei Inverter?
If your Huawei Inverter shows a 'Grid Underfrequency' error, it indicates that the power grid frequency is lower than the standard requirement for the local power grid. Follow these steps: 1. If the alarm occurs occasionally, the power grid may be temporarily abnormal. The SUN2000 automatically recovers after detecting that the power grid becomes normal. 2. If the alarm occurs frequently, check whether the grid frequency is within the acceptable range. If not, contact the local power operator. If yes, log in to the mobile phone app, SmartLogger, or NMS to modify the grid underfrequency protection threshold.
What to do if the Huawei SUN2000-20KTL-M2 Upgrade Failed or Software Version Unmatch?
If your Huawei Inverter displays 'Upgrade Failed or Software Version Unmatch,' it means the upgrade process did not complete successfully. To resolve this: 1. Try performing the upgrade again. 2. If the upgrade fails multiple times, contact your dealer or Huawei technical support.
What does Unbalanced Grid Voltage mean on my Huawei Inverter?
If your Huawei Inverter is showing an 'Unbalanced Grid Voltage' error, it means that the difference between grid phase voltages exceeds the upper threshold. Here's what to do: 1. If the alarm occurs occasionally, the power grid may be temporarily abnormal. The SUN2000 automatically recovers after detecting that the power grid becomes normal. 2. If the alarm occurs frequently, check whether the grid voltage is within the acceptable range. If no, contact the local power operator. 3. If the fault persists for a long time, check the connection between the AC switch and the output power cable.
Why is my Huawei SUN2000-20KTL-M2 Inverter showing Grid Undervoltage and what should I do?
If your Huawei Inverter displays a 'Grid Undervoltage' error, it indicates that the power grid voltage is below the lower threshold or the undervoltage duration exceeds the value specified by LVRT. Here's how to address it: 1. If the alarm occurs occasionally, the power grid may be temporarily abnormal. The SUN2000 automatically recovers once the power grid returns to normal. 2. If the alarm occurs frequently, verify that the grid voltage is within the acceptable range. If not, contact your local power operator. If it is, use the mobile app, SmartLogger, or NMS to adjust the grid undervoltage protection threshold with approval from the power operator. 3. If the problem persists, check the connection between the AC switch and the output power cable.
What causes String Current Backfeed on a Huawei SUN2000-20KTL-M2 Inverter and how to resolve it?
If your Huawei Inverter reports 'String Current Backfeed,' it means that too few PV modules are connected in series, causing the end voltage to be lower than other PV strings. To resolve this: 1. Check if the number of PV modules connected in series is less than that of other PV strings. If so, wait until the PV string current drops below 0.5 A, set the DC SWITCH to OFF, and adjust the number of PV modules. 2. Check if the PV string is shaded. 3. Check if the open-circuit voltage of the PV string is normal.
Why does my Huawei SUN2000-20KTL-M2 Inverter show Abnormal Grounding and how do I fix it?
If your Huawei Inverter displays an 'Abnormal Grounding' error, it indicates that the N cable or ground cable is not connected, especially when a PV array is grounded and the inverter output isn't connected to an isolation transformer. To resolve this: * Power off the inverter and check the PE cable connection. * If connected to a TN power grid, verify the N cable connection and its voltage to ground. * If the output is connected to an isolation transformer, disable Grounding inspection via the mobile app, SmartLogger, or NMS.
What causes DC Arc Fault in Huawei SUN2000-20KTL-M2 Inverter?
A 'DC Arc Fault' error on your Huawei Inverter means the PV string power cable is arcing or has a poor connection. Check whether the string cables arc or are in poor contact.
How to troubleshoot High String Input Voltage on Huawei Inverter?
A 'High String Input Voltage' error on your Huawei SUN2000 Inverter indicates that too many PV modules are connected in series, causing the open-circuit voltage to exceed the inverter's maximum input voltage. To solve this, check the number of PV modules connected in series and ensure the PV string open-circuit voltage is within the inverter's maximum operating voltage. After correcting the PV array configuration, the alarm should disappear automatically.
General| Model | SUN2000-20KTL-M2 |
|---|---|
| Type | String Inverter |
| Max. efficiency | 98.6% |
| European efficiency | 98.3% |
| Max. input voltage | 1100 V |
| Max. input current per MPPT | 26 A |
| Number of MPPTs | 2 |
| Rated output power | 20, 000 W |
| Start Voltage | 200 V |
| MPPT Voltage Range | 200 V - 1000 V |
| Max. AC Power | 22, 000 VA |
| Output Frequency | 50 Hz / 60 Hz |
| Dimensions (W x H x D) | 525 x 470 x 262 mm |
| Weight | 25 kg |
| Operating Temperature Range | -25°C to +60°C |
| Cooling Method | Natural Convection |
| Protection Degree | IP65 |
| Rated AC Voltage | 230 V / 400 V |
| Max. Input Power | 30, 000 W |
| Max. Output Power | 22, 000 W |
| Rated Output Voltage | 230 V / 400 V |
Describes the SUN2000 inverter, its installation, electrical connections, commissioning, maintenance, and troubleshooting.
Lists the target readers for this document, including installers and users.
Explains the meaning of symbols used throughout the document for safety and information.
Safety guidelines for personal protection during operations, including precautions against electric shock.
Safety guidelines related to electrical hazards, grounding, and cable connections.
Guidelines for selecting and maintaining a safe operating environment for the equipment.
Safety precautions for physical handling, mounting, and moving of the equipment.
Procedures and precautions for safely moving heavy equipment to prevent injury.
Guidelines for safe use of ladders during work at heights.
Safety procedures for hoisting operations and drilling holes.
Introduces the SUN2000 inverter and its function in converting DC power to AC power.
Describes typical grid-tied system configurations and components.
Details the physical components, ports, and indicators of the SUN2000 inverter.
Explains various labels, symbols, and warnings found on the equipment.
Describes symbols and their meanings found on the equipment enclosure.
Details the information provided on the product nameplate.
Explains the operational principles and conceptual diagram of the SUN2000.
Illustrates the conceptual circuit diagram of the SUN2000.
Describes the different operating modes of the SUN2000: Standby, Operating, and Shutdown.
Procedures for checking outer packing materials and inverter model before installation.
Lists the tools required for installation, categorized by type.
Guidelines for selecting the optimal installation location for the inverter.
Specifies environmental conditions for safe and optimal installation.
Details the necessary space around the unit for installation and heat dissipation.
Provides instructions for safely moving the inverter during installation.
Instructions for installing the mounting bracket for the inverter.
Step-by-step guide for wall-mounting the inverter bracket.
Step-by-step guide for installing the mounting bracket on supports.
General safety precautions before making electrical connections.
Steps to prepare for electrical connections, including cable selection.
Instructions for properly connecting the protective earth (PE) cable.
Detailed steps for connecting the AC output power cable.
Instructions for safely connecting the DC input power cables.
Steps for installing the Smart Dongle for communication.
Information on connecting various signal cables.
Guide for connecting RS485 cables for inverter cascading.
Guide for connecting RS485 cables to a Smart Power Sensor.
Checklist for verifying installation before powering on the system.
Step-by-step procedure for powering on the SUN2000 system.
Instructions for commissioning the system using the mobile app.
Guide to configuring various operational parameters of the SUN2000.
Configuration for controlling the energy output of the PV system.
Explanation and configuration of the Arc Fault Circuit Interrupter function.
Procedure for performing an IPS test for specific grid codes.
Details on setting up the SmartLogger for network communication.
Instructions for safely powering off the system for maintenance.
Guidelines for performing regular maintenance tasks.
Guidance for diagnosing and resolving common issues and alarms.
Steps for safely removing the inverter from its mounting.
Guidelines for packing the SUN2000 for transport or storage.
Instructions for proper disposal of the equipment at its end of life.
Detailed technical specifications for the SUN2000 models.
Technical specifications for compatible PV optimizers.
Lists supported national and regional grid codes for the SUN2000.
Procedure for changing or resetting the WLAN password.
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