HUAWEI 31500HXU Smart Module User Guide

HUAWEI 31500HXU Smart Module

Overview

NOTE

Dimensions (Length x Width): 1722 mm x 1134 mm.

Unpacking

1. Move the Smart Module package close to a supporting object and remove stretch wraps and binding straps.
   

2. Open the top cover of the package and remove the package.
   

3. Cut the horizontal binding straps of Smart Modules.
   

4. Tilt Smart Modules against the supporting object and cut the vertical binding straps.
   

5. Move Smart Modules one after another, starting from the one that is farthest away from the supporting object.
   

6. Stack Smart Modules neatly and stably on a horizontal surface.
   

NOTE

It is recommended that Smart Modules be unpacked and used according to the project progress. Smart Modules that are not used temporarily shall be stored in a dry and well-ventilated place away from sunlight.

• Before unpacking Smart Modules, ensure that the packages and binding straps are intact. If any exception occurs, contact your vendor or Huawei technical support.
• Do not unpack or transport Smart Modules by one person.
• Do not drop Smart Modules or cause objects to fall on Smart Modules.
• Do not step on Smart Modules.
• Do not hold junction boxes (including enclosures and cables) or optimizers to lift, drag, or move Smart Modules.
• During transport, do not scratch or bump Smart Modules or dent the backsheets to prevent damage on glass, cells, or backsheets of Smart Modules.

Switching Smart Modules to Working Mode

Switching to Working Mode

• Cut the cable tie to unfasten the optimizer output power cables.

• Push the optimizer gently and press down the connecting bracket button .

• Remove the optimizer while pressing down the button, and remove the buffer foam from the opt1m1zer.
  

• Rotate the optimizer 180° counterclockwise.

• Insert the optimizer until you hear a click.

NOTE

• Before switching the mode, ensure that the buffer foam, cables, and cable ties for optimizers are intact.
• Before switching the mode, ensure that the optimizer input power cables are correctly connected to the Smart Module output power cables.
• Push an optimizer horizontally into the connecting bracket. When you hear a click, the optimizer is properly installed.
• Ensure that all Smart Modules in use have been switched to working mode.

Verifying the Switching

NOTE

Check whether a Smart Module is successfully switched to working mode as shown in the figure.

Installing Smart Modules

Removing and Attaching the Optimizer SN Labels

Determine the actual installation locations of the Smart Modules and attach the optimizer SN labels to the physical layout template. For details, see the instructions on the back of the physical layout template.

Installing Smart Modules

• Perform operations with safety protection measures to prevent personal injury or death.

• Do not perform operations in harsh environments (including but not limited to strong wind, rainstorm, and damp rooftops) to prevent personal injury or death.

• Do not transport Smart Modules to the rooftop by one person to prevent the risk of falls from height and struck-by injuries.

• Handle Smart Modules with caution on the rooftop to prevent the risk of struck-by injuries caused by falling objects.

• Installation personnel must have electrician skills, receive thorough training, master correct operation methods and safety precautions before installing, operating, and maintaining the equipment.

• It is recommended that Smart Modules be installed in an environment with the temperature ranging from –20°C to +50°C. The operating temperature range of the Smart Modules is –40°C to +85°C and the humidity range is 5% to 95%.

• During installation, ensure that the tilt angle between a Smart Module and the rooftop is greater than or equal to 10°, and that the space between the Smart Module and the rooftop allows for heat dissipation and ventilation, and is free from obstacles.

Connecting Smart Module Cables

Connecting Ground Screws and Ground Cables for Smart Modules

• Install ground screws near the ground bar.
• The third-party grounding device must be reliable and certified. Strictly follow the manufacturer’s instructions to perform related operations

Detecting the Output Voltage or Resistance of a Smart Module

• Check whether the irradiance is sufficient. If the irradiance is low, see suggestion 1.
• If the irradiance is sufficient, check whether the optimizer input power cables are connected. If no, see suggestion 2.
• If optimizer cables are connected to the junction box, check whether cable connections are correct. If cable connections are incorrect, see suggestion 3.
• If optimizer cables are correctly connected, check the open-circuit voltage of the Smart Module. The normal voltage ranges from 35 V to 45 V. If the voltage is abnormal, see suggestion 4.
• If the open-circuit voltage of the Smart Module is normal, the optimizer is abnormal. See suggestion 5.

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1. Perform the detection under sufficient irradiance.
2. Connect the optimizer input power cables.
3. Correct the optimizer cable connections. Connect the optimizer input power cables to output power cables of the junction box.
4. Replace the Smart Module.
5. Replace the optimizer.

Connecting Smart Module Cables and Detecting the PV String Output Resistance

• Ensure that the input and output power cables are correctly connected. If they are reversely connected, Smart Modules may be damaged.
• Perform the detection under sufficient irradiance.
• Ensure that each Smart Module is normal before connecting all Smart Modules for PV string detection.
• The quantity of Smart Modules in a PV string is equal to the total resistance value. For example, if the quantity of Smart Modules is 10, the total resistance is 10 kΩ (±10%).

Connecting Cables Between PV Strings and the Inverter

NOTE

• To minimize electromagnetic interference, minimize the distance between the positive and negative cables of an optimizer.
• To ensure reliable communication between the inverter and optimizer, route DC and AC power cables in different cable slots with a spacing of more than 10 cm.

Optimizer Physical Layout

The physical layout must be configured for optimizers. When an optimizer is faulty, it can be quickly located and replaced based on the physical layout.

NOTE

For details, see the Smart Module User Manual or FusionSolar App Quick Guide. Scan the QR code to obtain the app quick guide.

Troubleshooting

Optimizer Faults

• Check the ventilation and ambient temperature of the Smart Module installation position. If the ventilation is poor or the ambient temperature exceeds the upper threshold, improve the ventilation and heat dissipation.
• If the ventilation and ambient temperature are normal, contact your vendor or Huawei technical support.

Internal hardware fault| The internal hardware of the optimizer is faulty.| Contact your vendor or Huawei technical support.
Output backfeed| Optimizer output backfeed occurred.|

• Check whether Smart Modules are shaded when PV strings are connected in parallel.
• If the fault persists, contact your vendor or Huawei technical support.

Abnormal output voltage| The optimizer output voltage is abnormal.|

• Perform optimizer search again when the irradiance is normal.
• Check whether the optimizer output extension cable is correctly prepared (positive connector at one end and negative connector at the other).
• Check whether the PV string is correctly connected to the inverter or whether there is a breakpoint in the PV string.
• If the fault persists, contact your vendor or Huawei technical support.

Upgrade failed| The optimizer software upgrade failed.|

• Perform optimizer upgrade again when the irradiance is normal.
• If the fault persists, contact your vendor or Huawei technical support.

Smart Module Faults

Huawei technical support.
Smart Module power decrease|

• There is a large amount of dust or soil on the glass of the Smart Module, which affects the absorption of sunlight.
• The Smart Module is faulty.

| Contact your vendor or Huawei technical support.

Precautions

Notice

• The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.
• Only qualified professionals or trained personnel are allowed to perform operations on the equipment. Operation personnel shall understand the system, its working principles, and relevant national/regional standards.
• Before installing the equipment, read the user manual carefully to get familiar with product information and safety precautions. The product warranty does not cover equipment damage caused by failure to follow the storage, transportation, installation, and usage guidelines specified in this document and the user manual.
• Before installing the equipment, check whether the deliverables are complete and intact. If any item is missing or damaged, contact your vendor.
• All figures in this document are for reference only and may vary with actual products and scenarios.

Personal Safety

• During operations, use dedicated insulated tools to prevent electric shocks or short circuits. The dielectric withstanding voltage level must comply with local laws, regulations, standards, and specifications.
• During operations, wear personal protective equipment such as protective clothing, insulated shoes, goggles, safety helmets, and insulated gloves.

More Support

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Issue: 03
Part Number: 31500HXU
Date: 2023-09-15

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