Huawei SUN2000-450W Series Troubleshooting Manual
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Huawei SUN2000-450W Series Troubleshooting Manual

Huawei SUN2000-450W Series Troubleshooting Manual

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SUN2000-450W and SUN2000-600W-P Series
Troubleshooting Guide
Issue
01
Date
2024-1-2
Huawei Digital Power Technologies Co., Ltd.

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Summary of Contents for Huawei SUN2000-450W Series

  • Page 1 SUN2000-450W and SUN2000-600W-P Series Troubleshooting Guide Issue Date 2024-1-2 Huawei Digital Power Technologies Co., Ltd.
  • Page 2 All other trademarks and trade names mentioned in this document are the property of their respective holders. Notice The purchased products, services and features are stipulated by the contract made between Huawei Digital Power Technologies Co., Ltd. and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope.

  • Page 3: About This Document

     Users Change History Changes between document issues are cumulative. The latest document contains all the changes made in earlier issues. Issue 01 (2024-1-2) This issue is the first official release. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd.

  • Page 4: Table Of Contents

    3.4.5 An Optimizer Is Offline and the Impedance is Abnormal (R1 Is Much Greater Than N1) ........25 3.5 Faults in the Multiple-Inverter Scenario ......................26 3.5.1 Impedance Is Normal ............................26 3.5.2 Impedance Is Abnormal ............................ 30 Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd.

  • Page 5: Product Overview

    Full configuration: All PV modules are connected to optimizers. In this scenario, the MPPT function, module-level shutdown and monitoring, and long- string design are supported. Optimizers configured for all PV modules Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..

  • Page 6: Functions And Features

    Module-level monitoring: Monitors the operating status of each PV module. Long PV string: If all PV modules are configured with optimizers, a PV string can contain more PV modules than a conventional PV string. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..

  • Page 7: Optimizer Knowledge

    Troubleshooting Guide 2 Optimizer Knowledge Optimizer Knowledge Optimizer installation: (1) User manuals: https://support.huawei.com/enterprise/en/fusionsolar/sun2000p- pid-22098206 (2) Quick guides: https://support.huawei.com/enterprise/en/fusionsolar/sun2000p- pid-22098206 (3) Installation videos: https://support.huawei.com/enterprise/en/fusionsolar/sun2000p-pid-22098206 Optimizer troubleshooting: (1) Optimizer Troubleshooting Guide (2) Robot FAQs Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..

  • Page 8: Troubleshooting

    (R1 + R2)/2 kΩ ≈ N x 1 kΩ. For example, if there are 16 optimizers in a PV string, the PV string impedance should be about 16 kΩ. If the measured PV string impedance is abnormal, rectify the fault by referring to this section. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 9 SUN2000-450W and SUN2000-600W-P Series Troubleshooting Guide 3 Troubleshooting Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 10 SUN2000-450W and SUN2000-600W-P Series Troubleshooting Guide 3 Troubleshooting Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..

  • Page 11: Optimizer Search Failure

    Cause 1: The dry contact function of the inverter is set to DI rapid shutdown, and thus optimizer search is not allowed. Check the following configurations on the management system and app. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 12 SUN2000-450W and SUN2000-600W-P Series Troubleshooting Guide 3 Troubleshooting Management system: App: Solution: Change the dry contact function of the inverter to NC. Cause 2: The inverter is faulty. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..

  • Page 13: Not All Optimizers Found In The Single-Inverter Scenario

    Cause 2: A safety box is installed between the PV modules and the PV terminals of the inverter, but the upstream or downstream terminals of the safety box are in poor contact. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 14 PV module side. Solution: Check the core wires in the extension cable terminals on the PV module side and re-crimp them. Then, search for optimizers again. Incorrect terminal crimping: Correct terminal crimping: Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..

  • Page 15: Impedance Is Normal, But Not All Optimizers Are Found

    Cause: The terminals of the extension cables between the inverter and optimizers are in poor contact on the inverter side. Solution: Check the core wires in the extension cable terminals on the inverter side and re- crimp them. Then, search for optimizers again. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..

  • Page 16: Optimizer Offline

    R2. If some optimizers are connected in reverse polarity, the forward impedance R1 of the PV string is similar to the backward impedance R2.) During optimizer search, the inverter reports an "Abnormal PV module configuration" alarm or optimizers report an "Abnormal output voltage" alarm. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 17 Check the four extension cables for PV2 one by one. The first and last terminals of extension cables 1 and 2 are both male or female. As a result, the outputs of the four optimizers in the middle are connected in reverse polarity. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..

  • Page 18: Optimizers Are Offline Occasionally, But Their Total Energy Yields Are Updating

    226.026 kWh): Cause: The optimizers are shut down due to heartbeat issues. Solution: When the irradiance is good, upgrade the optimizer MBUS to SPC330 or later. Upgrade on the local app: Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 19 SUN2000-450W and SUN2000-600W-P Series Troubleshooting Guide 3 Troubleshooting Upgrade on the management system: Step 1 Choose Plants > Device > Update Management. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 20 SUN2000-450W and SUN2000-600W-P Series Troubleshooting Guide 3 Troubleshooting Step 2 On the Software Packages page, click Add to upload the software package. Step 3 Create an upgrade task on the Device Upgrade page. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 21 If the problem persists after the MBUS is upgraded, you are advised to add an air core inductor. (If the inverter is installed indoors, you can install an air core inductor under the inverter. Otherwise, install the air core inductor under the PV modules.) Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..

  • Page 22: Optimizers Are Offline For A Long Time, Power Parameters Are Available But The Sns Are Empty

    (The optimizer SNs change after the upgrade, so this method is not applicable to plants that require a physical layout diagram.) Note: Contact Huawei frontline personnel to obtain the inverter software of a specific restricted version. If the plant requires a physical layout diagram, replace the offline optimizers.
  • Page 23 Step 1 Choose Plants > Device > Update Management. Step 2 On the Software Packages page, click Add to upload the software package. Step 3 Create an upgrade task on the Device Upgrade page. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 24 SUN2000-450W and SUN2000-600W-P Series Troubleshooting Guide 3 Troubleshooting Step 4 After the upgrade task is created, check the upgrade progress and result on the upgrade page. ----End Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 25 Upgrade the DSP on the management system: Step 1 Choose Plants > Device > Update Management. Step 2 On the Software Packages page, click Add to upload the software package. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 26 SUN2000-450W and SUN2000-600W-P Series Troubleshooting Guide 3 Troubleshooting Step 3 Create an upgrade task on the Device Upgrade page. ----End Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 27 (connect only one PV string at a time), and search for optimizers again. The number of found optimizers should be equal to the actual number of connected optimizers. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 28 3 Troubleshooting When the irradiance is good, upgrade the DSP software of the optimizers in the PV string to the latest version. After the upgrade is successful, the optimizers can work properly. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..

  • Page 29: An Optimizer Is Offline And The Impedance Is Abnormal (R1 Is Much Greater Than N1)

    Symptom: The measured impedance of the PV string where the offline optimizer is located is infinite. After the inverter begins to work in on-grid mode, the PV string current is always Cause: A disconnection occurs in the PV string. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..

  • Page 30: Faults In The Multiple-Inverter Scenario

    Cause: Crosstalk occurs. The customer does not connect cables in accordance with the user manual, which requires that the positive and negative cables of the optimizers be routed close to each other to reduce the impact of EMC. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 31 SUN2000-450W and SUN2000-600W-P Series Troubleshooting Guide 3 Troubleshooting Incorrect cabling: Requirement in the user manual: Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 32 Step 2 After 5 minutes, connect all PV strings intended for the first inverter and search for optimizers. Ensure that the number of optimizers found is correct, grid connection is normal, and all the optimizers work properly. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..
  • Page 33 Step 4 After performing step 3 for all inverters, check that the number of optimizers found by each inverter is correct. Then, connect all PV string cable terminals to the Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..

  • Page 34: Impedance Is Abnormal

    Ensure that the positive and negative cables of the optimizers are routed close to each other. Installation video: https://support.huawei.com/enterprise/en/fusionsolar/sun2000p-pid-22098206 3.5.2 Impedance Is Abnormal For details, refer to the troubleshooting instructions in sections 3.3 and 3.4. Issue 01 (2024-1-2) Copyright © Huawei Technologies Co., Ltd..

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Sun2000-600w-p series

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