Huawei SUN2000-(8KTL-20KTL)-M2 User Manual

SUN2000-(8KTL-20KTL)-M2

User Manual

Issue

01

Date

2020-07-02

HUAWEI TECHNOLOGIES CO., LTD.

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No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

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 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. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.

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.

Huawei Technologies Co., Ltd.

Address:

Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China

Website:

https://e.huawei.com

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About This Document

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Purpose

Symbol

Description

Indicates a hazard with a high level of risk which, if not avoided, will result in death or serious injury.

Indicates a hazard with a medium level of risk which, if not avoided, could result in death or serious injury.

Indicates a hazard with a low level of risk which, if not avoided, could result in minor or moderate injury.

About This Document

This document describes the SUN2000-8KTL-M2, SUN2000-10KTL-M2, SUN2000-12KTL-M2, SUN2000-15KTL-M2, SUN2000-17KTL-M2, and SUN2000-20KTL-M2 (SUN2000 for short) in terms of installation, electrical connections, commissioning, maintenance, and troubleshooting. Read this document through, understand the safety information, and get familiar with the functions and features of the SUN2000 before installing and operating it.

The SUN2000-8KTL-M2 and SUN2000-10KTL-M2 inverters are applicable only to Australia.

Intended Audience

This document is intended for:



Installers



Users

Symbol Conventions

The symbols that may be found in this document are defined as follows.

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Symbol

Description

Indicates a potentially hazardous situation which, if not avoided, could result in equipment damage, data loss, performance deterioration, or unanticipated results.

NOTICE is used to address practices not related to personal injury.

Supplements the important information in the main text. NOTE is used to address information not related to

personal injury, equipment damage, and environment deterioration.

Change History

Changes between document issues are cumulative. The latest document issue contains all updates made in previous issues.

Issue 01 (2020-07-02)

This issue is used for first office application (FOA).

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1.1 General Safety

Statement

Before installing, operating, and maintaining the equipment, read this document and observe all the safety instructions on the equipment and in this document.

1 Safety Information

The "NOTICE", "CAUTION", "WARNING", and "DANGER" statements in this document do not cover all the safety instructions. They are only supplements to the safety instructions. Huawei will not be liable for any consequence caused by the violation of general safety requirements or design, production, and usage safety standards.

Ensure that the equipment is used in environments that meet its design specifications. Otherwise, the equipment may become faulty, and the resulting equipment malfunction, component damage, personal injuries, or property damage are not covered under the warranty.

Follow local laws and regulations when installing, operating, or maintaining the equipment. The safety instructions in this document are only supplements to local laws and regulations.

Huawei will not be liable for any consequences of the following circumstances:



Operation beyond the conditions specified in this document



Installation or use in environments which are not specified in relevant international or national standards



Unauthorized modifications to the product or software code or removal of the product



Failure to follow the operation instructions and safety precautions on the product and in this document



Equipment damage due to force majeure, such as earthquakes, fire, and storms



Damage caused during transportation by the customer

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

Storage conditions that do not meet the requirements specified in this document

General Requirements

Do not work with power on during installation.



Do not install, use, or operate outdoor equipment and cables (including but not limited to moving equipment, operating equipment and cables, inserting connectors to or removing connectors from signal ports connected to outdoor facilities, working at heights, and performing outdoor installation) in harsh weather conditions such as lightning, rain, snow, and level 6 or stronger wind.



After installing the equipment, remove idle packing materials such as cartons, foam, plastics, and cable ties from the equipment area.



In the case of a fire, immediately leave the building or the equipment area, and turn on the fire alarm bell or make an emergency call. Do not enter the building on fire in any case.



Do not scrawl, damage, or block any warning label on the equipment.



Tighten the screws using tools when installing the equipment.



Understand the components and functioning of a grid-tied PV power system and relevant local standards.



Repaint any paint scratches caused during equipment transportation or installation in a timely manner. Equipment with scratches cannot be exposed to an outdoor environment for a long period of time.



Do not open the host panel of the equipment.

Personal Safety



If there is a probability of personal injury or equipment damage during operations on the equipment, immediately stop the operations, report the case to the supervisor, and take feasible protective measures.



Use tools correctly to avoid hurting people or damaging the equipment.



Do not touch the energized equipment, as the enclosure is hot.

1.2 Personnel Requirements



Personnel who plan to install or maintain Huawei equipment must receive thorough training, understand all necessary safety precautions, and be able to correctly perform all operations.



Only qualified professionals or trained personnel are allowed to install, operate, and maintain the equipment.

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

Only qualified professionals are allowed to remove safety facilities and inspect the equipment.



Personnel who will operate the equipment, including operators, trained personnel, and professionals, should possess the local national required qualifications in special operations such as high-voltage operations, working at heights, and operations of special equipment.



Only professionals or authorized personnel are allowed to replace the equipment or components (including software).



Professionals: personnel who are trained or experienced in equipment operations and are clear of the sources and degree of various potential hazards in equipment installation, operation, and maintenance



Trained personnel: personnel who are technically trained, have required experience, are aware of possible hazards on themselves in certain operations, and are able to take protective measures to minimize the hazards on themselves and other people



Operators: operation personnel who may come in contact with the equipment, except trained personnel and professionals

1.3 Electrical Safety

Grounding



For the equipment that needs to be grounded, install the ground cable first when installing the equipment and remove the ground cable last when removing the equipment.



Do not damage the ground conductor.



Do not operate the equipment in the absence of a properly installed ground conductor.



Ensure that the equipment is connected permanently to the protective ground. Before operating the equipment, check its electrical connection to ensure that it is securely grounded.

General Requirements

Before connecting cables, ensure that the equipment is intact. Otherwise, electric shocks or fire may occur.



Ensure that all electrical connections comply with local electrical standards.



Obtain approval from the local electric utility company before using the equipment in grid-tied mode.



Ensure that the cables you prepared meet local regulations.

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

AC and DC Power

Do not connect or disconnect power cables with power on. Transient contact between the core of the power cable and the conductor will generate electric arcs or sparks, which may cause fire or personal injury.



Use dedicated insulated tools when performing high-voltage operations.

Before making electrical connections, switch off the disconnector on the upstream device to cut off the power supply if people may contact energized components.

Before connecting a power cable, check that the label on the power cable is correct.

If the equipment has multiple inputs, disconnect all the inputs before operating the equipment.

Cabling



When routing cables, ensure that a distance of at least 30 mm exists between the cables and heat-generating components or areas. This prevents damage to the insulation layer of the cables.



Bind cables of the same type together. When routing cables of different types, ensure that they are at least 30 mm away from each other.



Ensure that the cables used in a grid-tied PV power system are properly connected and insulated and meet specifications.

1.4 Installation Environment Requirements



Ensure that the equipment is installed in a well ventilated environment.



To prevent fire due to high temperature, ensure that the ventilation vents or heat dissipation system are not blocked when the equipment is running.



Do not expose the equipment to flammable or explosive gas or smoke. Do not perform any operation on the equipment in such environments.

1.5 Mechanical Safety

Using Ladders



Use wooden or fiberglass ladders when you need to perform live working at heights.

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

When a step ladder is used, ensure that the pull ropes are secured and the ladder is held firm.



Before using a ladder, check that it is intact and confirm its load bearing capacity. Do not overload it.



Ensure that the wider end of the ladder is at the bottom, or protective measures have been taken at the bottom to prevent the ladder from sliding.



Ensure that the ladder is securely positioned. The recommended angle for a ladder against the floor is 75 degrees, as shown in the following figure. An angle rule can be used to measure the angle.



When climbing a ladder, take the following precautions to reduce risks and ensure safety:

− Keep your body steady.

− Do not climb higher than the fourth rung of the ladder from the top.

− Ensure that your body's center of gravity does not shift outside the legs of

the ladder.

Drilling Holes

When drilling holes into a wall or floor, observe the following safety precautions:



Wear goggles and protective gloves when drilling holes.



When drilling holes, protect the equipment from shavings. After drilling, clean up any shavings that have accumulated inside or outside the equipment.

Moving Heavy Objects



Be cautious to avoid injury when moving heavy objects.

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

When moving the equipment by hand, wear protective gloves to prevent injuries.

1.6 Commissioning

When the equipment is powered on for the first time, ensure that professional personnel set parameters correctly. Incorrect settings may result in inconsistency with local certification and affect the normal operation of the equipment.

1.7 Maintenance and Replacement

High voltage generated by the equipment during operation may cause an electric shock, which could result in death, serious injury, or serious property damage. Prior to maintenance, power off the equipment and strictly comply with the safety precautions in this document and relevant documents.



Maintain the equipment with sufficient knowledge of this document and using proper tools and testing equipment.



Before maintaining the equipment, power it off and follow the instructions on the delayed discharge label to ensure that the equipment is powered off.



Place temporary warning signs or erect fences to prevent unauthorized access to the maintenance site.



If the equipment is faulty, contact your dealer.



The equipment can be powered on only after all faults are rectified. Failing to do so may escalate faults or damage the equipment.

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2.1 Product Introduction

Function

The SUN2000 is a three-phase grid-tied PV string inverter that converts the DC power generated by PV strings into AC power and feeds the power into the power grid.

2 Overview

Models

This document involves the following product models:



SUN2000-8KTL-M2



SUN2000-10KTL-M2



SUN2000-12KTL-M2



SUN2000-15KTL-M2



SUN2000-17KTL-M2



SUN2000-20KTL-M2

The SUN2000-8KTL-M2 and SUN2000-10KTL-M2 inverters are applicable only to Australia.

Figure 2-1 Model description (SUN2000-20KTL-M2 is used as an example)

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Table 2-1 Model description

Icon

Meaning

Description

1

Product

SUN2000: three-phase grid-tied PV string inverter

2

Power level



8K: The rated power is 8 kW.



10K: The rated power is 10 kW.



12K: The rated power is 12 kW.



15K: The rated power is 15 kW.



17K: The rated power is 17 kW.



20K: The rated power is 20 kW.

3

Topology

TL: transformerless

4

Product code

M2: the product series with the 1080 V DC input voltage

Network Application

The SUN2000 applies to grid-tied PV systems for residential rooftops and small ground plants. Typically, a grid-tied system consists of the PV string, SUN2000, AC switch, and alternating current distribution unit (ACDU).

Figure 2-2 Networking application - Single inverter scenario (optional in dashed boxes)

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Figure 2-3 Networking application - Inverter cascading scenario (optional in dashed

(A) PV string

(B) DC switch

(C) SUN2000

(D) AC switch

(E) ACDU

(F) Smart Power Sensor

(G) Power grid

(H) 4G Smart Dongle

(I) WLAN-FE Smart Dongle

(J) Router

(K) FusionSolar management system

(L) FusionSolar APP

(M) Load

(N) Ripple Control Device

(O) Rapid shutdown switch

boxes)



indicates a power cable, indicates a signal cable, indicates wireless

communication.



If the inverter is connected to the FusionSolar app over its built-in WiFi network, only local commissioning can be performed.



In the RS485 cascading communication networking, the master inverter model is SUN2000-(3KTL-20KTL)-M2 and SUN2000-(3KTL-20KTL)-M0, and the slave inverter model can be SUN2000-(3KTL-20KTL)-M2, SUN2000-(3KTL-20KTL)-M0, SUN2000-50KTL/60KTL/65KTL-M0, SUN2000-29.9KTL/36KTL, or SUN2000-33KTL-A.

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(P) Smart PV optimizer

Supported Power Grids

Power grid types supported by the SUN2000 include TN-S, TN-C, TN-C-S, TT, and IT.

Figure 2-4 Supported power grids

 

In a TT power grid, the N-PE voltage should be lower than 30 V. In an IT power grid, you need to set isolation settings to input not grounded, with a

transformer.

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2.2 Appearance

(1) LED indicator

(2) Front panel

(3) Mounting plate

(4) Heat sink

(5) Ventilation valve

(6) Ground screw

(7) AC output port (AC)

(8) Communication port (COM)

(9) Smart Dongle port (GPRS/4G/WLAN-FE)

(10) DC input terminals (PV4+/PV4–) (11) DC input terminals (PV3+/PV3–)

(12) DC input terminals (PV2+/PV2–)

(13) DC input terminals (PV1+/PV1–)

(14) DC switch (DC SWITCH)

(15) Screw hole for the DC switch (for Australia only)

Category

Status

Meaning

Running

LED1

LED2

N/A

Figure 2-5 Appearance

Table 2-2 LED indicator description

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Category

Status

Meaning

indication

Steady green

The SUN2000 is operating in grid-tied mode.

Blinking green at long intervals (on for 1s and then off for 1s)

Off

The DC is on and the AC is off.

Blinking green at long intervals (on for 1s and then off for 1s)

The DC is on, the AC is on, and the SUN2000 is not exporting power to the power grid.

Off

Blinking green at long intervals (on for 1s and then off for 1s)

The DC is off and the AC is on.

Off

Both the DC and AC are off.

Blinking red at short intervals (on for 0.2s and then off for 0.2s)

N/A

There is a DC environmental alarm, such as an alarm indicating that High String Input Voltage, String Reverse Connection, or Low Insulation Resistance.

N/A

Blinking red at short intervals (on for 0.2s and then off for 0.2s)

There is an AC environmental alarm, such as an alarm indicating Grid Undervoltage, Grid Overvoltage, Grid Overfrequency, or Grid Underfrequency.

Steady red

Fault

Communicatio n indication

LED3

N/A

Blinking green at short intervals (on for

0.2s and then off for 0.2s)

Communication is in progress. (When a mobile phone is connected to the SUN2000, the indicator first indicates that the phone is connected to the SUN2000): blinks green at long intervals.)

Blinking green at long intervals (on for 1s and then off for 1s)

The mobile phone is connected to the SUN2000.

Off

There is no communication.

Device

LED1

LED2

LED3

N/A

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Category

Status

Meaning

replacement indication

Steady red

The SUN2000 hardware is faulty. The SUN2000 needs to be replaced.

Symbol

Name

Meaning

Delayed discharge

Residual voltage exists after the SUN2000 is powered off. It takes 5 minutes for the SUN2000 to discharge to the safe voltage.

Burn warning

Do not touch an operating SUN2000 because it generates high temperatures on the shell.

Electric shock warning label



High voltage exists after the SUN2000 is powered on. Only qualified and trained electrical technicians are allowed to perform operations on the SUN2000.



High touch current exists after the SUN2000 is powered on. Ensure that the SUN2000 has been grounded before powering on it.

Refer to documentation

Reminds operators to refer to the documents shipped with the SUN2000.

Grounding

Indicates the position for connecting the protective earthing (PE) cable.

2.3 Label Description

2.3.1 Enclosure Labels

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Symbol

Name

Meaning

Operation warning

Do not remove the DC input connector or the AC output connector when the SUN2000 is running.

SUN2000 serial number (SN) label

Indicates the SUN2000 SN.

SUN2000 MAC address label

Indicates the MAC address.

QR code label for SUN2000 WiFi connection

Scan the QR code to connect to Huawei SUN2000 WiFi network.

2.3.2 Product Nameplate

Figure 2-6 Nameplate (SUN2000-20KTL-M2 as an example)

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(1) Trademark and product model

(2) Important technical specifications

(3) Compliance symbols

(4) Company name and country of manufacture

The nameplate figure is for reference only.

2.4 Working Principles

2.4.1 Circuit Diagram

Four PV strings connect to the SUN2000, and their maximum power points are tracked by two maximum power point tracking (MPPT) circuits. The SUN2000 converts DC power into three-phase AC power through an inverter circuit. Surge protection is supported on both the DC and AC sides.

Figure 2-7 SUN2000 conceptual diagram

2.4.2 Working Modes

The SUN2000 can work in Standby, Operating, or Shutdown mode.

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Figure 2-8 Working modes

Working Mode

Description

Standby

The SUN2000 enters Standby mode when the external environment does not meet the operating requirements. In Standby mode:



The SUN2000 continuously performs status check and enters the Operating mode once the operating requirements are met.



The SUN2000 enters Shutdown mode after detecting a shutdown command or a fault after startup.

Table 2-3 Working mode description

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Working Mode

Description

Operating

In Operating mode:



The SUN2000 converts DC power from PV strings into AC power and feeds the power to the power grid.



The SUN2000 tracks the maximum power point to maximize the PV string output.



If the SUN2000 detects a fault or a shutdown command, it enters the Shutdown mode.



The SUN2000 enters Standby mode after detecting that the PV string output power is not suitable for connecting to the power grid for generating power.

Shutdown



In Standby or Operating mode, the SUN2000 enters Shutdown mode after detecting a fault or shutdown command.



In Shutdown mode, the SUN2000 enters Standby mode after detecting a startup command or that the fault is rectified.

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3 Storage

The following requirements should be met if the SUN2000 is not put into use directly:



Do not unpack the SUN2000.



Keep the storage temperature at –40°C to +70°C and the humidity at 5%–95% RH (non-condensing).



The SUN2000 should be stored in a clean and dry place and be protected from dust and water vapor corrosion.



A maximum of six SUN2000s can be stacked. To avoid personal injury or device damage, stack SUN2000s with caution to prevent them from falling over.



Periodic inspections are required during the storage. Replace the packing materials if necessary.



If the SUN2000 has been long-term stored, inspections and tests should be conducted by qualified personnel before it is put into use.

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4.1 Checking Before Installation

Outer Packing Materials

Before unpacking the inverter, check the outer packing materials for damage, such as holes and cracks, and check the inverter model. If any damage is found or the inverter model is not what you requested, do not unpack the package and contact your supplier as soon as possible.

4 Installation

You are advised to remove the packing materials within 24 hours before installing the inverter.

Package Contents

After unpacking the inverter, check that the contents are intact and complete. If any damage is found or any component is missing, contact your supplier.

For details about the number of contents, see the

Packing List

in the packing case.

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Type

Tool

Installa tion Tools

Hammer drill

Drill bit: Φ8 mm and Φ6 mm

Socket wrench set

Torque screwdriver Phillips head: M3

Diagonal pliers

Wire stripper

Removal wrench Model: PV-MS-HZ

Open-end Wrench; manufacturer:

Staubli

Rubber mallet

Utility knife

Cable cutter

Crimping tool Model:

PV-CZM-22100; manufacturer: Staubli

Multimeter DC voltage

measurement range ≥ 1100 V DC

Vacuum cleaner

Marker

Measuring tape

Bubble or digital level

Cord end terminal crimper

4.2 Tools

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Type

Tool

Heat shrink tubing

Heat gun

Cable tie

Hydraulic pliers

PPE

Safety gloves

Safety goggles

Anti-dust respirator

Safety shoes

4.3 Determining the Installation Position

4.3.1 Environment Requirements

Basic Requirements



The SUN2000 is protected to IP65 and can be installed indoors or outdoors.



Do not install the SUN2000 in a place where personnel are easy to come into contact with its enclosure and heat sinks, because these parts are extremely hot during operation.



Do not install the SUN2000 in areas with flammable or explosive materials.



Do not install the SUN2000 at a place within children's reach.



Do not install the SUN2000 outdoors in salt areas because it will be corroded there and may cause fire. A salt area refers to the region within 500 meters from the coast or prone to sea breeze. The regions prone to sea breeze vary depending on weather conditions (such as typhoons and monsoons) or terrains (such as dams and hills).



The SUN2000 must be installed in a well-ventilated environment to ensure good heat dissipation.



Recommended: Install the SUN2000 in a sheltered place or a place with an awning.

Mounting Structure Requirements



The mounting structure where the SUN2000 is installed must be fireproof.



Do not install the SUN2000 on flammable building materials.

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

The SUN2000 is heavy. Ensure that the installation surface is solid enough to bear the weight load.



In residential areas, do not install the SUN2000 on drywalls or walls made of similar materials which have a weak sound insulation performance because the noise generated by the SUN2000 is noticeable.

4.3.2 Space Requirements

Installation Angle Requirements

The SUN2000 can be wall-mounted or pole-mounted. The installation angle requirements are as follows:



Install the SUN2000 vertically or at a maximum back tilt of 15 degrees to facilitate heat dissipation.



Do not install the SUN2000 at forward tilted, excessive back tilted, side tilted, horizontal, or upside down positions.

Figure 4-1 Installation tilts

Installation Space Requirements



Reserve enough space around the SUN2000 to ensure sufficient space for installation and heat dissipation.

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Figure 4-2 Installation space



When installing multiple SUN2000s, install them in horizontal mode if sufficient space is available and install them in triangle mode if no sufficient space is available. Stacked installation is not recommended.

Figure 4-3 Horizontal installation (recommended)

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Figure 4-4 Staggered installation (recommended)

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Figure 4-5 Stacked installation (not recommended)

4.4 Moving an Inverter

Procedure

Step 1 Two persons are required to move the inverter and one person on both sides. Lift

the inverter from the packing case and move it to the specified installation position.

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

To prevent personal injury and damage to the device, take care to keep your balance when moving the SUN2000.



Do not use the wiring terminals and ports at the bottom to support any weight of the SUN2000.



When you need to temporally place the SUN2000 on the ground, use foam, paper or other protective materials to prevent damage to its enclosure.

Figure 4-6 Moving an inverter

----End

4.5 Installing the Mounting Bracket

Installation Precautions

Figure 4-7 shows the dimensions of installation holes on the SUN2000.

Figure 4-7 Mounting bracket dimensions

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(1) Bolt

(2) Nut

(3) Spring washer

(4) Flat washer

(5) Expansion tube

Two M6 screw holes are reserved on both left and right sides of the enclosure for installing an awning.

4.5.1 Wall-mounted Installation

Procedure

Step 1 Determine the installation positions for drilling holes, and mark the positions using

a marker.

Step 2 Secure the mounting brackets.



M6x60 expansion bolts are delivered with the SUN2000. If the length and amount of the bolts do not meet installation requirements, prepare M6 stainless steel expansion bolts by yourself.



The expansion bolts delivered with the inverter are used for solid concrete walls. For other types of walls, prepare bolts by yourself and ensure that the wall meets the load bearing requirements of the inverter.

Figure 4-8 Expansion bolt composition

Avoid drilling holes in the utility pipes or cables attached to the back of the wall.

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

To prevent dust inhalation or contact with eyes, wear safety goggles and an anti-dust respirator when drilling holes.



Clean up any dust in and around the holes using a vacuum cleaner and measure the distance between holes. If large hole tolerance exists, position and drill holes again.



After removing the bolt, spring washer, and flat washer, level the front of the expansion tube with the concrete wall. Otherwise, the mounting brackets will not stay steady on the concrete wall.



Partially loosen the nut, flat washer and spring washer of the two expansion bolts below.

Figure 4-9 Installing the Mounting Bracket

Step 3 (Optional) Install the locking screw for the DC switch.



The screws for DC switches are delivered with solar inverters. According to Australian standards, the screws are used to secure DC switches (DC SWITCH) to prevent them from being turned on by mistake.



For the model used in Australia, perform this step to meet the local standards.

Figure 4-10 Installing a locking screw for the DC switch

Step 4 Install the SUN2000 onto the mounting bracket.

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Step 5 Tighten nuts.

Figure 4-11 Installing the SUN2000

Step 6 (Optional) Install the anti-theft lock.



Prepare an anti-theft lock suitable for the lock hole diameter (Ф8 mm) by yourself.



An outdoor waterproof lock is recommended.



Keep the key to the anti-theft lock safe.

Figure 4-12 Installing the anti-theft lock

----End

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4.5.2 Support-mounted Installation

Prerequisites

Prepare M6 stainless bolt assemblies (including flat washers, spring washers, and M6 bolts) with appropriate lengths as well as matched flat washers and nuts based on the support specifications.

Procedure

Step 1 Determine the hole positions based on the marking-off template, and then mark

the hole positions using a marker.

Figure 4-13 Determining hole positions

Step 2 Drill holes using a hammer drill.

You are advised to apply anti-rust paint on the hole positions for protection.

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Figure 4-14 Drilling holes

Step 3 Secure the mounting bracket.

Figure 4-15 Securing the mounting bracket

Step 4 Install the SUN2000 onto the mounting bracket. Step 5 Tighten the bolt assembly.

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Figure 4-16 Installing the SUN2000

Step 6 (Optional) Install the anti-theft lock.



Prepare an anti-theft lock suitable for the lock hole diameter (Ф8 mm) by yourself.



An outdoor waterproof lock is recommended.



Keep the key to the anti-theft lock safe.

Figure 4-17 Installing the anti-theft lock

----End

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Precautions

5 Electrical Connections

Before connecting cables, ensure that the DC switch on the SUN2000 and all the switches connecting to the SUN2000 are OFF. Otherwise, the high voltage of the SUN2000 may result in electric shocks.



The equipment damage caused by incorrect cable connections is beyond the warranty scope.



Only certified electricians are allowed to connect cables.



Operation personnel must wear proper PPE when connecting cables.

The cable colors shown in the electrical connection diagrams provided in this chapter are for reference only. Select cables in accordance with local cable specifications (green-and-yellow cables are only used for PE).

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5.1 Preparing for Installation

No.

Component

Description

Source

A

PV module



A PV string is composed of the PV modules connected in series.



The SUN2000 supports the input from four PV strings.

Prepared by the customer

B

Smart PV optimizer

The SUN2000-450W-P smart PV optimizer is supported.

Purchased from Huawei

C

DC switch

Recommended: a PV circuit breaker with a rated voltage greater than or equal to 1100 V DC and a rated current of 15 A.

Prepared by the customer

D

Smart Donglea



WLAN-FE Smart Dongle: SDongleA-05.



4G Smart Dongle: SDongleA-03.

Purchased from Huawei

Figure 5-1 SUN2000 cable connections (optional in dashed boxes)

If the Smart Dongle is configured, you are advised to install the Smart Dongle before connecting the signal cable.

Table 5-1 Component description

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No.

Component

Description

Source

E

SUN2000

Select a proper model based on requirements.

Purchased from Huawei

F

SmartLogger

Select a proper model based on requirements.

Purchased from Huawei

G

Smart Power Sensor

The recommended electricity meter model is DTSU666-H.

Purchased from Huawei

H

Ripple Control Device

Select the devices that meet the power grid scheduling requirements.

Provided by local power grid companies

I

Rapid shutdown switch

Select a proper model based on requirements.

Prepared by the customer

J

AC switchb

Recommended: a three-phase AC circuit breaker with a rated voltage greater than or equal to 415 V AC and a rated current of:



25 A (SUN2000-8KTL-M2, SUN2000-10KTL-M2, SUN2000-12KTL-M2)



40 A (SUN2000-15KTL-M2, SUN2000-17KTL-M2, SUN2000-20KTL-M2)

Prepared by the customer



Note a: WLAN-FE Smart Dongle: For details about the SDongleA-05 operation, see

SDongleA-05

Quick Guide (WLAN-FE)

; 4G Smart Dongle: For details about the SDongleA-03 operation, see

SDongleA-03 Quick Guide (4G)

. You can obtain the quick guide at

https://support.huawei.com/enterprise by searching for the Smart Dongle model.



Note b: SUN2000-8KTL-M2 and SUN2000-10KTL-M2 inverters are applicable only to Australia.

No.

Name

Type

Recommended Specifications

1

DC input power cable

Standard PV cable in the industry



Conductor cross-sectional area: 4–6 mm2



Cable outer diameter: 5.5–9 mm

2

(Optional) RS485 communications cable (used to cascade inverters or connect to the RS485 signal port on the SmartLogger)

Two-core outdoor shielded twisted pair cable



Conductor cross-sectional area: 0.2–1 mm2



Cable outer diameter: 4–11 mm

Table 5-2 Cable description

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No.

Name

Type

Recommended Specifications

3

(Optional) RS485 communications cable (used to connect to the RS485 signal port on a Smart Power Sensor for export limitation)

Two-core outdoor shielded twisted pair cable



Conductor cross-sectional area: 0.2–1 mm2



Cable outer diameter: 4–11 mm

4

(Optional) Rapid shutdown switch signal cable

Two-core outdoor shielded twisted pair cable



Conductor cross-sectional area: 0.2–1 mm2



Cable outer diameter: 4–11 mm

5

(Optional) Grid scheduling signal cable

Five-core outdoor cable



Conductor cross-sectional area: 0.2–1 mm2



Cable outer diameter: 4–11 mm

6

AC output power cablea

Outdoor copper cableb

SUN2000-8KTL-M2, SUN2000-10KTL-M2, SUN2000-12KTL-M2:



Conductor cross-sectional area: 6–16 mm2



Cable outer diameter: 11–26 mm

SUN2000-15KTL-M2, SUN2000-17KTL-M2, SUN2000-20KTL-M2:



Conductor cross-sectional area: 10–16 mm2



Cable outer diameter: 11–26 mm

7

PE cable

Single-core outdoor copper cablec

SUN2000-8KTL-M2, SUN2000-10KTL-M2, SUN2000-12KTL-M2: Conductor cross-sectional area ≥ 6 mm2

SUN2000-15KTL-M2, SUN2000-17KTL-M2, SUN2000-20KTL-M2: Conductor cross-sectional area ≥ 10 mm2



Note a: The minimum cable diameter depends on the fuse rating on the AC side.



Note b: The SUN2000-8KTL-M2 and SUN2000-10KTL-M2 inverters are applicable only to Australia.



Note c: The SUN2000-8KTL-M2 and SUN2000-10KTL-M2 inverters are applicable only to Australia.

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

The minimum cable diameter should comply with the local cable standard.



Factors influencing cable selection are as follows: nominal AC current, type of cable, routing method, ambient temperature, and maximum desired line losses.

5.2 Connecting the PE cable

Precautions



Ensure that the PE cable is properly connected. If it is disconnected or loose, electric shocks may occur.



Do not connect the neutral wire to the enclosure as a PE cable. Otherwise, electric shocks may occur.



The PE point at the AC output port is used only as a PE equipotential point, and cannot substitute for the PE point on the enclosure.



After the ground cable is installed, it is recommended that the silica gel or paint be applied to the ground terminal for protection.

Additional Information

The SUN2000 has the grounding detection function. This function detects whether the SUN2000 is grounded properly before its startup, or whether the ground cable is disconnected when the SUN2000 is running. This function works under limited conditions. To ensure the safe operation of the SUN2000, ground the SUN2000 properly according to the connection requirements of the PGND cable. For some power grid types, if the output side of the inverter is connected to an isolation transformer, ensure that the inverter is properly grounded and set isolation settings to Input not grounded, with a transformer to enable the inverter to run properly.



According to IEC62109, to ensure safe application in case of the ground cable is damaged or disconnected, connect the PE cable properly before the grounding detection function is disabled. Ensure that the PE cable meets at least one of the following requirements.

− The PE cable is a single-core outdoor copper cable with a conductor

− Use cables that have the same diameter as the AC output cable, and

cross-sectional area of at least 10 mm 2.

ground the PE terminal on the AC connector and the ground screw on the enclosure respectively.

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Procedure

(1) Cable

(2) Core wire

(3) Heat shrink tubing

(4) OT terminal

(5) Crimping tool

(6) Heat gun

Step 1 Crimp the OT terminal.



In some countries and regions, additional ground cables are required for the SUN2000. In this case, use cables that have the same diameter as the AC output cable, and ground the PE terminal on the AC connector and the ground screw on the enclosure respectively.



Pay attention not to damage the core wire when stripping a cable.



The cavity formed after crimping the conductor strip of the OT terminal needs to wrap the core wire completely. The core wire needs to contact the OT terminal closely.



Wrap the wire crimping area with the heat shrink tubing or the PVC insulation tape. The following figure uses the heat shrink tubing as an example.



When using the heat gun, protect devices from being scorched.

Figure 5-2 Crimping an OT terminal

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Step 2 Connect the PE cable.

Figure 5-3 Connecting the PE cable

----End

5.3 Connecting the AC Output Power Cable

Precautions

A three-phase AC switch needs to be installed on the AC side of the SUN2000. To ensure that the SUN2000 can safely disconnect itself from the power grid when an exception occurs, select a proper overcurrent protection device in compliance with local power distribution regulations.

Do not connect loads between the SUN2000 and the AC switch directly connected to it.

The SUN2000 is integrated with a comprehensive residual current monitoring unit. Once detecting that the residual current exceeds the threshold, the SUN2000 immediately disconnects itself from the power grid.

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

If the external AC switch can perform earth leakage protection, the rated leakage action current should be greater than or equal to 100 mA.



If multiple SUN2000s connect to the general residual current device (RCD) through their respective external AC switches, the rated leakage action current of the general RCD should be greater than or equal to the number of SUN2000s multiplied by 100 mA.



A knife switch cannot be used as an AC switch.



The hex key is delivered with the inverter and bound to the hanging kit at the bottom of the inverter.

Figure 5-4 Hex key

Procedure

Step 1 Connect the AC output power cable to the AC connector.

Figure 5-5 Stripping requirements

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

Ensure that the cable jacket is inside the connector.



Ensure that the exposed core wire is totally inserted into the cable hole.



Ensure that AC terminations provide firm and solid electrical connections. Failing to do so may cause SUN2000 malfunction and damage to its AC connectors.



Ensure that the cable is not twisted.

Figure 5-6 Three-core cable (L1, L2, and L3)

Figure 5-7 Four-core cable (L1, L2, L3, and PE)

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Figure 5-8 Four-core cable (L1, L2, L3, and N)

Figure 5-9 Five-core cable (L1, L2, L3, N, and PE)

The cable colors shown in the figures are for reference only. Select an appropriate cable according to local standards.

Step 2 Connect the AC connector to the AC output port.

Ensure that the AC connector is connected securely.

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Figure 5-10 Securing the AC connector

Step 3 Check the route of the AC output power cable.

Figure 5-11 Cable route

----End

Disconnection

Disconnection can be performed in reverse order.

5.4 Connecting the DC input power cable

Precautions

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

Before connecting the DC input power cable, ensure that the DC voltage is within the safe range (lower than 60 V DC), and that the DC SWITCH is set to the OFF position. Failure to do so could generate high voltage, which may cause electric shocks.



When the SUN2000 is operating, it is not allowed to operate the DC input power cable, such as connecting or disconnecting a PV string or a PV module in a PV string. Failing to do so may cause electric shocks.



If no PV string is connected to a DC input terminal of the SUN2000, do not remove the watertight cap from the terminal. Otherwise, the IP rating of the SUN2000 will be affected.

Ensure that the following conditions are met. Otherwise, the SUN2000 may be damaged, or even a fire could happen.



PV modules connected in series in each PV string are of the same specifications.



The open-circuit voltage of each PV string is always lower than or equal to 1080 V DC.



The maximum short-circuit current of each PV string must be lower than or equal to 15 A.



The DC input power cable is correctly connected. The positive and negative terminals of a PV module are connected to corresponding positive and negative DC input terminals of the SUN2000.



If the DC input power cable is reversely connected, do not operate the DC switch and positive and negative connectors. Wait until the solar irradiance declines at night and the PV string current reduces to below 0.5 A, and then turn off the DC switch. Remove the positive and negative connectors to correct the polarity.

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

(1) Terminals of DC input 1

(2) Terminals of DC input 2

(3) Terminals of DC input 3

(4) Terminals of DC input 4

Because the output of the PV string connected to the SUN2000 cannot be grounded, ensure that the PV module output is insulated to ground.



The PV strings connecting to the same MPPT route should contain the same number and model of PV modules or Smart PV optimizers.



During the installation of PV strings and the SUN2000, the positive or negative terminals of PV strings may be short-circuited to ground if power cables are not properly installed or routed. An AC or DC short circuit may occur and damage the device when the SUN2000 is operating. The caused device damage is not covered under any warranty.

Terminal Description

Figure 5-12 Terminals

Procedure

Before inserting the positive and negative connectors into the positive and negative DC input terminals of the SUN2000, check that the DC SWITCH is OFF.

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

Cables with high rigidity, such as armored cables, are not recommended as DC input power cables, because poor contact may be caused by the bending of the cables.



Before assembling DC connectors, label the cable polarities correctly to ensure correct cable connections.



After crimping the positive and negative metal contacts, pull the DC input power cables back to ensure that they are connected securely.



Insert the crimped metal contacts of the positive and negative power cables into the appropriate positive and negative connectors. Then pull back the DC input power cables to ensure that they are connected securely.



If the DC input power cable is reversely connected and the DC SWITCH is set to the ON position, do not operate the DC SWITCH and positive and negative connectors. Otherwise, the device may be damaged. The caused device damage is not covered under any warranty. Wait until the solar irradiance declines and the PV string current drops to below 0.5 A. Then set the two DC SWITCH to the OFF position, remove the positive and negative connectors, and rectify the connection of the DC input power cable.



The DC voltage measurement range of the multimeter must be at least 1080 V. If the voltage is a negative value, the DC input polarity is incorrect and needs correction. If the voltage is greater than 1080 V, too many PV modules configured in the same string. Remove some PV modules.



If the PV string is configured with an optimizer, check the cable polarity by referring to the Smart PV optimizer quick guide.

Step 1 Connect the DC input power cable.

Use the Staubli MC4 positive and negative metal terminals and DC connectors delivered with the SUN2000. Using incompatible positive and negative metal terminals and DC connectors may result in serious consequences. The caused device damage is not covered under any warranty or service agreement.

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Figure 5-13 Assembling a DC connector

----End

Removing a DC connector

Before removing the positive and negative connectors, ensure that the DC SWITCH is OFF.

To remove the positive and negative connectors from the SUN2000, insert an open-end wrench into the notch and press hard to remove the DC connector.

Figure 5-14 Removing a DC connector

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5.5 (Optional) Installing the Smart Dongle

Procedure



If WLAN-FE communication is used, install a WLAN-FE Smart Dongle (SDongleA-05).



If 4G communication is used, install a 4G Smart Dongle (SDongleA-03).



You need to purchase the Smart Dongle by yourself.



WLAN-FE Smart DongleDongle (FE Communication) You are advised to use a CAT 5E outdoor shielded network cable (outer

diameter < 9 mm; internal resistance ≤ 1.5 ohms/10 m) and shielded RJ45 connectors.

Figure 5-15 Installing a WLAN-FE Smart Dongle (FE communication)



4G Smart Dongle (4G Communication)



If you prepared a Smart Dongle without a SIM card, you need to prepare a standard SIM card (size: 25 mm x 15 mm) with the capacity greater than or equal to 64 KB.



When installing the SIM card, determine its installation direction based on the silk screen and arrow on the card slot.



When being pressed into place, the SIM card will be locked, which means that the card is installed correctly.



To remove the SIM card, push it inwards. Then the SIM card springs out automatically.



When reinstalling the WLAN-FE Smart Dongle or 4G Smart Dongle, ensure that the buckle springs back in place.

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Figure 5-16 Installing the 4G Smart Dongle

There are two types of Smart Dongle:



For details about how to use the WLAN-FE Smart Dongle SDongleA-05, see the

SDongleA-05 Quick Guide (WLAN-FE)

document.

. You can also scan the QR code to obtain the



For details about how to use the 4G Smart Dongle SDongleA-03, see the

Quick Guide (4G)

The quick guide is delivered with the Smart Dongle.

. You can also scan the QR code to obtain the document.

5.6 (Optional) Installing the Signal Cable

Communication port signal definitions

SDongleA-03

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Defini tion

Function

Description

Defini tion

Function

Description

1

485A1

-1

RS485 differential signal+

Used to connect to the RS485 signal port on the SUN2000 or SmartLogger10 00

2

485A1

-2

RS485 differential signal+

Used to connect to the RS485 signal port on the SUN2000 or SmartLogger10 00A

3

485B1

-1

RS485 differential signal–

4

485B1

-2

RS485 differential signal–

5

PE

Shielding ground

N/A

6

PE

Shielding ground

N/A

7

485A2

RS485 differential signal+

Used to connect to an RS485 signal port on a Smart Power Sensor for export limitation

8

DIN1

Dry contact interface for grid scheduling

Connects to the Ripple Control Device.

9

485B2

RS485 differential signal–

10

DIN2



Not all inverter models are delivered with the signal cable connector.



When routing the signal cable, ensure that it is separate from the power cable and away from interfering sources to prevent communication from being affected.



The protection layer of the cable is in the connector. Cut off surplus core wires from the protection layer. Ensure that the core wires are completely inserted into the cable holes, and that the cable is securely connected.



If the Smart Dongle is configured, you are advised to install the Smart Dongle before connecting the signal cable.

Figure 5-17 Signal definitions

Table 5-3 Signal definitions

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Defini tion

Function

Description

Defini tion

Function

Description

11

N/A

12

DIN3

13

GND

Used to connect to the rapid shutdown DI signal port and served as a reserved port for the signal cable of the NS protection.

14

DIN4

15

DIN5

Rapid shutdown signal+

16

GND

Communication Networking



Smart Dongle Networking Scenario

Figure 5-18 Smart Dongle networking



In the Smart Dongle networking scenario, the SmartLogger cannot be connected.



The Smart Power Sensor is necessary for export limitation. Only the DTSU666-H Smart Power Sensor (provided by Huawei) can be used.



The Smart Power Sensor and Smart Dongle need to be connected to the same inverter.



SmartLogger Networking Scenario

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Figure 5-19 SmartLogger networking



In the SmartLogger networking scenario, the Smart Dongle cannot be connected.



A maximum of 80 devices can connect to a single SmartLogger, such as inverters, Smart Power sensor, and EMI. You are advised to connect fewer than 30 devices to each RS485 route.



The Smart Power Sensor is necessary for export limitation. Select the Smart Power Sensor according to the actual project.



To ensure the system response speed, the Smart Power Sensor is recommended to be connected to a COM port separately from inverter COM port.

5.6.1 Connecting the RS485 Communications Cable (Inverter Cascading)

Procedure

Step 1 Connect the signal cable to the signal cable connector.

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Figure 5-20 Installing the cable

Step 2 Connect the signal cable connector to the COM port.

Figure 5-21 Securing the signal cable connector

----End

5.6.2 Connecting the RS485 Communications Cable (Smart Power Sensor)

Cable Connection

The following figure shows the cable connections between the inverter and the Smart Power Sensor.

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Figure 5-22 Cable connection (Three Phase Three Wire)

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Figure 5-23 Cable connection (Three Phase Four Wire)

(1) Shielding layer of the signal cable

Procedure

Step 1 Connect the signal cable to the signal cable connector.

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Figure 5-24 Installing the cable

Step 2 Connect the signal cable to the COM port.

Figure 5-25 Securing the signal cable connector

----End

5.6.3 Connecting the Rapid shutdown signal cable

Procedure

Step 1 Connect the signal cable to the signal cable connector.

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

If optimizers are configured for some PV modules, the rapid shutdown function is not supported.



To enable the rapid shutdown function, you need to connect the access switch to pins 13 and 15. The switch is closed by default. The rapid shutdown is triggered when the switch changes from closed to open.

Figure 5-26 Installing the cable

Step 2 Connect the signal cable connector to the COM port.

Figure 5-27 Securing the signal cable connector

----End

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5.6.4 Connecting the Power Grid Scheduling Signal Cable

Cable Connection

The following figure shows the cable connections between the inverter and the Ripple Control Device.

Figure 5-28 Cable connection

Procedure

Step 1 Connect the signal cable to the signal cable connector.

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Figure 5-29 Installing the cable

Step 2 Connect the signal cable to the COM port.

Figure 5-30 Securing the signal cable connector

----End

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6.1 Check Before Power-On

No.

Check Item

Acceptance Criteria

1

SUN2000 installation

The SUN2000 is installed correctly, securely, and reliably.

2

Smart Dongle

The Smart Dongle is installed correctly and securely.

3

Cable layout

Cables are routed properly as required by the customer.

4

Cable tie

Cable ties are secured evenly and no burr exists.

5

Grounding

The ground cable is connected correctly, securely, and reliably.

6

Turn off the switches

The DC SWITCH and all the switches connected to the SUN2000 are set to OFF.

7

Cable connections

The AC output power cable, DC input power cable, and signal cable are connected correctly, securely, and reliably.

8

Unused terminals and ports

Unused terminals and ports are locked by watertight caps.

9

Installation environment

The installation space is proper, and the installation environment is clean and tidy, without foreign matter.

Table 6-1 Installation checklist

6 Commissioning

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6.2 Powering On the System

Category

Status

Meaning

Running indication

LED1

LED2

N/A

Steady green

The SUN2000 is operating in grid-tied mode.

Precautions



Before turning on the AC switch between the SUN2000 and the power grid, use a multimeter set to the AC position to check that the AC voltage is within the specified range.



If the DC is on and the AC is off, the SUN2000 reports a Grid Failure alarm. The SUN2000 starts normally only after the fault is automatically rectified.

Procedure

Step 1 Turn on the AC switch between the SUN2000 and the power grid. Step 2 (Optional) Remove the locking screw from the DC switch.

Figure 6-1 Removing the locking screw from a DC switch

Step 3 If there is a DC switch between the PV string and the inverter, turn on the DC switch. Step 4 Set the DC SWITCH at the bottom of the SUN2000 to the ON position. Step 5 Wait for about 1 minute, and then observe the LED indicators of the inverter to

check the running status.

Table 6-2 LED indicator description

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Category

Status

Meaning

Blinking green at long intervals (on for 1s and then off for 1s)

Off

The DC is on and the AC is off.

Blinking green at long intervals (on for 1s and then off for 1s)

The DC is on, the AC is on, and the SUN2000 is not exporting power to the power grid.

Off

Blinking green at long intervals (on for 1s and then off for 1s)

The DC is off and the AC is on.

Off

Both the DC and AC are off.

Blinking red at short intervals (on for 0.2s and then off for 0.2s)

N/A

There is a DC environmental alarm, such as an alarm indicating that High String Input Voltage, String Reverse Connection, or Low Insulation Resistance.

N/A

Blinking red at short intervals (on for 0.2s and then off for 0.2s)

There is an AC environmental alarm, such as an alarm indicating Grid Undervoltage, Grid Overvoltage, Grid Overfrequency, or Grid Underfrequency.

Steady red

Fault

Communicatio n indication

LED3

N/A

Blinking green at short intervals (on for

0.2s and then off for 0.2s)

Communication is in progress. (When a mobile phone is connected to the SUN2000, the indicator first indicates that the phone is connected to the SUN2000): blinks green at long intervals.)

Blinking green at long intervals (on for 1s and then off for 1s)

The mobile phone is connected to the SUN2000.

Off

There is no communication.

Device replacement indication

LED1

LED2

LED3

N/A

Steady red

The SUN2000 hardware is faulty. The SUN2000 needs to be replaced.

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LED Color

Status

Remarks

Description

N/A

Off

Normal

The Dongle is not secured or is not powered on.

Yellow (blinking green and red simultaneously)

Steady on

The Dongle is secured and powered on.

Red

Blinking at short intervals (on for 0.2s and then off for 0.2s)

The parameters for connecting to the router are to be set.

Steady on

Abnormal

The Dongle is faulty. Replace the Dongle.

Green

Blinking at long intervals (on for 0.5s and then off for 0.5s)

Normal

Connecting to the router. Steady on

Successfully connected to the management system.

Blinking at short intervals (on for 0.2s and then off for 0.2s)

The inverter is communicating with the management system through the Dongle.

Step 6 (Optional) Observe the LED to check the operating status of the Smart Dongle.



WLAN-FE Smart Dongle

Figure 6-2 WLAN-FE Smart Dongle

Table 6-3 LED indicator description

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

LED Color

Status

Remarks

Description

N/A

Off

Normal

The Dongle is not secured or is not powered on.

Yellow (blinking green and red simultaneously)

Steady on

Normal

The Dongle is secured and powered on.

Green

Blinking in a 2-second cycle (on for 0.1s and then off for 1.9s)

Normal

Dialing (duration < 1 min).

Abnormal

If the duration is longer than 1 min, the 4G parameter settings are incorrect. Reset theparameters.

Blinking at long intervals (on for 1s and then off for 1s)

Normal

The dial-up connection is set up successfully (duration < 30s).

Abnormal

If the duration is longer than 30s, the settings of the management system parameters are incorrect. Reset the parameters.

Steady on

Normal

Successfully connected to the management system.

Blinking at short intervals (on for 0.2s and then off for 0.2s)

The inverter is communicating with the management system through the Dongle.

Red

Steady on

Abnormal

The Dongle is faulty. Replace Dongle.

Blinking at short intervals (on for 0.2s and then off for 0.2s)

The Dongle has no SIM card or the SIM card is in poor contact. Check whether the SIM card has been installed or is in good contact. If not, install the SIM card or remove and insert the SIM card.

4G Smart Dongle

Table 6-4 LED indicator description

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LED Color

Status

Remarks

Description

Blinking at long intervals (on for 1s and then off for 1s)

The Dongle fails to connect to the management system because it has no signals, weak signal, or no traffic. If the Dongle is reliably connected, check the SIM card signal through the APP. If no signal is received or the signal strength is weak, contact the carrier. Check whether the tariff and traffic of the SIM card are normal. If not, recharge the SIM card or buy traffic.

Blinking red and green alternatively

Blinking at long intervals (on for 1s and then off for 1s)

No communication with the inverter.



Remove and insert the Dongle.



Check whether inverters match the Dongle.



Connect the Dongle to other inverters. Check whether the Dongle or the USB port of the inverter is faulty.

----End

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7 Man-Machine Interaction

7.1 App Commissioning

7.1.1 Downloading the FusionSolar App

Search for FusionSolar in Google Play (Android) to download and install the app. You can also scan one of the following QR codes to obtain the app.

Figure 7-1 QR code



The latest Android version must be used for device commissioning. The iOS version is not updated and can be used only for viewing PV plant information. For iOS users, you can search for FusionSolar in the App Store or scan the following QR code to download the iOS version.



The screenshots are for reference only. The actual screens prevail.

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7.1.2 (Optional) Registering an Installer Account



If you have an installer account, skip this step.



You can register an account only using a mobile phone only in China.



The mobile number or email address used for registration is the user name for logging in to the FusionSolar app.

Create the first installer account and create a domain named after the company name.

Figure 7-2 Creating the first installer account

To create multiple installer accounts for a company, log in to the FusionSolar app and tap New User to create an installer account.

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Figure 7-3 Creating multiple installer accounts for the same company

7.1.3 Creating a PV Plant and a User

Figure 7-4 Creating a PV plant and a user

For details about how to use the site deployment wizard, see You can also scan the QR code to obtain the document.

FusionSolar App Quick Guide

.

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7.1.4 (Optional) Setting the Physical Layout of the Smart PV Optimizers



If smart PV optimizers are configured for PV strings, ensure that the smart PV optimizers have been successfully connected to the SUN2000 before performing the operations in this section.



Check that the SN labels of smart PV optimizers are correctly attached to the physical layout template.



Take and save a photo of the physical layout template. Keep your phone parallel to the template and take a photo in landscape mode. Ensure that the four positioning points in the corners are in the frame. Ensure that each QR code is attached within the frame.



For details about the physical layout of smart PV optimizers, see

Guide

. You can also scan the QR code to obtain the document.

FusionSolar App Quick

Scenario 1: Setting on the FusionSolar Server Side (Solar Inverter Connected to the Management System)

Step 1 Log in to the FusionSolar app and tap the plant name on the Home screen to access

the plant screen. Select Plant layout, tap , and upload the physical layout template photo as prompted.

Figure 7-5 Uploading the physical layout template photo (App)

You can also upload the physical layout template photo on the WebUI as follows: Log in to https://intl.fusionsolar.huawei.com to access the WebUI of the FusionSolar Smart PV Management System. On the home page, click the plant name to go to the plant page.

Choose Plant layout, click Add Physical Layout > , and upload the physical layout template photo.

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Figure 7-6 Uploading the physical layout template photo (WebUI)

Step 2 Log in to https://intl.fusionsolar.huawei.com to access the WebUI of the FusionSolar

Smart PV Management System. On the Homepage page, click the plant name to go to the plant page. Select Plant layout. Choose > Generate with AI, and create

a physical layout as prompted. You can also manually create a physical location layout.

Figure 7-7 Physical layout design of PV modules

----End

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Scenario 2: Setting on the Solar Inverter Side (Solar Inverter Not Connected to the Management System)

Step 1 Access the Device Commissioning screen on the FusionSolar app to set the physical

layout of Smart PV Optimizers.

1. Log in to the FusionSolar app. On the Device Commissioning screen, choose

Maintenance > Physical layout design of PV modules. The Physical layout design of PV modules screen is displayed.

2. Tap the blank area. The Identify image and Add PV modules buttons are

displayed. You can use either of the following methods to perform operations as prompted:

− Method 1: Tap Identify image and upload the physical layout template

photo to complete the optimizer layout. (The optimizers that fail to be identified need to be manually bound.)

− Method 2: Tap Add PV modules to manually add PV modules and bind the

optimizers to the PV modules.

Figure 7-8 Physical layout design of PV modules

----End

7.1.5 Detect optimizer disconnection

On the SUN2000 screen, choose Maintenance > Optimizer disconnection detection, tap the detection button to detect the optimizer disconnection, and

rectify the fault based on the detection result.

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Figure 7-9 Detect optimizer disconnection

7.2 Parameters Settings

Go to the Device Commissioning screen and set SUN2000 parameters. For details about entering the Device Commissioning screen, see B Device Commissioning.

To set more parameters, tap Settings. For details about the parameters, see the

FusionSolar APP and SUN2000 App User Manual

obtain the document.

7.2.1 Energy Control

On the home screen, tap Power adjustment to perform the corresponding operation.

Figure 7-10 Energy control

. You can also scan the QR code to

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7.2.1.1 Grid-tied Point Control

Parameter Name

Description

Active power

Unlimited

-

If this parameter is set to Unlimited, the output power of the SUN2000 is not limited and the SUN2000 can connect to the power grid at the rated power.

Grid connectio n with zero power

Closed-loop controller



If multiple SUN2000s are cascaded, set this parameter to SDongle/SmartLogger.



If there is only one SUN2000, set this parameter to Inverter.

Limitation mode

Total power indicates export limitation of the total power at the grid-tied point.

Power adjustment period

Specifies the shortest interval for a single anti-backfeeding adjustment.

Power control hysteresis

Specifies the dead zone for adjusting the SUN2000 output power. If the power fluctuation is within the power control hysteresis, the power is not adjusted.

Active power output limit for fail-safe

Specifies the derating value of the SUN2000 active power by percentage. If the Smart Dongle does not detect any meter data or the communication between the Smart Dongle and the SUN2000 is disconnected, the Smart Dongle delivers the derating value of the SUN2000 active power by percentage.

Function

Limits or reduces the output power of the PV power system to ensure that the output power is within the power deviation limit.

Procedure

Step 1 On the home screen, choose Power adjustment > Grid-tied point control.

Figure 7-11 Grid-tied point control

Table 7-1 Grid-tied point control

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Parameter Name

Description

Communicatio n disconnection fail-safe

In the SUN2000 anti-backfeeding scenario, if this parameter is set to Enable, the SUN2000 will derate according to the active power derating percentage when the communication between the SUN2000 and the Smart Dongle is disconnected for a period longer than Communication disconnection detection time.

Communicatio n disconnection detection time

Specifies the time for determining the communication disconnection between the SUN2000 and the Dongle.

This parameter is displayed when Communication disconnection fail-safe is set to Enable.

Grid connectio n with limited power (kW)

Closed-loop controller



If multiple SUN2000s are cascaded, set this parameter to SDongle/SmartLogger.



If there is only one SUN2000, set this parameter to Inverter.

Limitation mode

Total power indicates export limitation of the total power at the grid-tied point.

Maximum grid feed-in power

Specifies the maximum active power transmitted from the grid-tied point to the power grid.

Power adjustment period

Specifies the shortest interval for a single anti-backfeeding adjustment.

Power control hysteresis

Specifies the dead zone for adjusting the SUN2000 output power. If the power fluctuation is within the power control hysteresis, the power is not adjusted.

Active power output limit for fail-safe

Specifies the derating value of the SUN2000 active power by percentage. If the Smart Dongle does not detect any meter data or the communication between the Smart Dongle and the SUN2000 is disconnected, the Smart Dongle delivers the derating value of the SUN2000 active power by percentage.

Communicatio n disconnection fail-safe

In the SUN2000 anti-backfeeding scenario, if this parameter is set to Enable, the SUN2000 will derate according to the active power derating percentage when the communication between the SUN2000 and the Smart Dongle is disconnected for a period longer than Communication disconnection detection time.

Communicatio n disconnection detection time

Specifies the time for determining the communication disconnection between the SUN2000 and the Dongle.

This parameter is displayed when Communication disconnection fail-safe is set to Enable.

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Parameter Name

Description

Grid connectio n with limited power (%)

Closed-loop controller



If multiple SUN2000s are cascaded, set this parameter to SDongle/SmartLogger.



If there is only one SUN2000, set this parameter to Inverter.

Limitation mode

Total power indicates export limitation of the total power at the grid-tied point.

PV plant capacity

Specifies the total maximum active power in the SUN2000 cascading scenario.

Maximum grid feed-in power

Specifies the percentage of the maximum active power of the grid-tied point to the PV plant capacity.

Power adjustment period

Specifies the shortest interval for a single anti-backfeeding adjustment.

Power control hysteresis

Specifies the dead zone for adjusting the SUN2000 output power. If the power fluctuation is within the power control hysteresis, the power is not adjusted.

Active power output limit for fail-safe

Specifies the derating value of the SUN2000 active power by percentage. If the Smart Dongle does not detect any meter data or the communication between the Smart Dongle and the SUN2000 is disconnected, the Smart Dongle delivers the derating value of the SUN2000 active power by percentage.

Communicatio n disconnection fail-safe

In the SUN2000 anti-backfeeding scenario, if this parameter is set to Enable, the SUN2000 will derate according to the active power derating percentage when the communication between the SUN2000 and the Smart Dongle is disconnected for a period longer than Communication disconnection detection time.

Communicatio n disconnection detection time

Specifies the time for determining the communication disconnection between the SUN2000 and the Dongle.

This parameter is displayed when Communication

disconnection fail-safe is set to Enable.

----End

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7.2.2 AFCI

Function

If PV modules or cables are incorrectly connected or damaged, electric arcs may be generated, which may cause fire. Huawei solar inverters provide arc detection meets the requirement of UL 1699B-2018, ensuring the user safety and property.

This function is enabled by default. The solar inverter automatically detects arc faults. To disable this function, log in to the FusionSolar app, enter the Device Commissioning screen, choose Settings > Feature parameters, and disable AFCI.

For details about entering the Device Commissioning screen, see B Device

Commissioning.

Clearing Alarms

The AFCI function involves the DC arc fault alarm.

The SUN2000 has the AFCI alarm automatic clearance mechanism. If an alarm is triggered for less than five times within 24 hours, the SUN2000 automatically clears the alarm. If the alarm is triggered for more than five times within 24 hours, the SUN2000 locks for protection. You need to manually clear the alarm on the SUN2000 so that it can work properly.

You can manually clear the alarm as follows:

Log in to the FusionSolar app and choose My > Device Commissioning. On the Device commissioning screen, connect and log in to the SUN2000 that generates the AFCI alarm, tap Alarm management, and tap Clear on the right of the DC arc fault alarm to clear the alarm.

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Figure 7-12 Alarm management

7.2.3 IPS Check (for Italy CEI0-21 Grid Code Only)

Function

The Italy CEI0-21 grid code requires an IPS check for the SUN2000. During the self-check, the SUN2000 checks the protection threshold and protection time of the maximum voltage over 10 min (59.S1), maximum overvoltage (59.S2), minimum undervoltage (27.S1), minimum undervoltage (27.S2), maximum overfrequency (81.S1), maximum overfrequency (81.S2), minimum underfrequency (81.S), and minimum underfrequency (81.S2).

Procedure

Step 1 On the home screen, choose Maintenance > IPS test to access the IPS test screen. Step 2 Tap Start to start an IPS test. The SUN2000 detects maximum voltage over 10 min

(59.S1), maximum overvoltage (59.S2), minimum undervoltage (27.S1), minimum undervoltage (27.S2), maximum overfrequency (81.S1), maximum overfrequency (81.S2), and minimum underfrequency (81.S1), and minimum underfrequency (81.S2).

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Figure 7-13 IPS test

IPS Test Type

Description

Maximum voltage over 10 min (59.S1)

The default maximum voltage over 10 min protection threshold is 253 V (1.10 Vn), and the default protection time threshold is 3s.

Maximum overvoltage (59.S2)

The default overvoltage protection threshold is 264.5 V (1.15 Vn), and the default protection time threshold is 0.2s.

Minimum undervoltage (27.S1)

The default undervoltage protection threshold is 195.5 V (0.85 Vn), and the default protection time threshold is 1.5s.

Minimum undervoltage (27.S2)

The default undervoltage protection threshold is 34.5 V (0.15 Vn), and the default protection time threshold is 0.2s.

Maximum overfrequency (81.S1)

The default overfrequency protection threshold is 50.2 Hz, and the default protection time threshold is 0.1s.

Table 7-2 IPS test type

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IPS Test Type

Description

Maximum overfrequency (81.S2)

The default overfrequency protection threshold is 51.5 Hz, and the default protection time threshold is 0.1s.

Minimum underfrequency (81.S1)

The default underfrequency protection threshold is 49.8 Hz, and the default protection time threshold is 0.1s.

Minimum underfrequency (81.S2)

The default underfrequency protection threshold is 47.5 Hz, and the default protection time threshold is 0.1s.

Step 3 After the IPS test is complete, IPS State is displayed as IPS state success. Tap

Historical report in the upper right corner of the screen to view the IPS check

report.

----End

7.3 SmartLogger Networking Scenario

See the

(Distributed Inverters + SmartLogger1000A + RS485 Networking)

Connecting to Huawei Hosting Cloud Quick Guide (Inverters + SmartLogger3000 + RS485 Networking). You can scan the QR code to obtain it.

Figure 7-14 SmartLogger1000A

Figure 7-15 SmartLogger3000

Distributed PV Plants Connecting to Huawei Hosting Cloud Quick Guide

and PV Plants

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8.1 System Power-Off

Precautions

8 Maintenance

Procedure

Step 1 Send a shutdown command on the app. Step 2 Turn off the AC switch between the SUN2000 and the power grid. Step 3 Turn off the DC switch at the bottom of the SUN2000. Step 4 (Optional) Install the locking screw for the DC switch.



After the SUN2000 powers off, the remaining electricity and heat may still cause electric shocks and body burns. Therefore, put on protective gloves and begin operating the SUN2000 five minutes after the power-off.



Before maintaining the optimizers and PV strings, power off the system by performing the following steps. Otherwise, the PV strings may be energized, resulting in electric shocks.

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Figure 8-1 Installing a locking screw for the DC switch

Check Detail

Check Method

Maintenance Interval

System cleanliness

Check the heat sink for foreign matter or the overall health of the SUN2000.

Annual or every time an abnormality is detected

System running status

Check the SUN2000 for damage or deformation.

Annual

Electrical connections



Cables are securely connected.



Cables are intact, in particular, the parts touching the metallic surface are not scratched.

The first inspection is 6 months after the initial commissioning. From then on, the interval can be 6 to 12 months.

Grounding reliability

Check whether the ground terminal and ground cable are securely connected.

Annual

Sealing

Check whether all terminals and ports are properly sealed.

Annual

Step 5 Turn off the DC switch between the SUN2000 and PV strings.

----End

8.2 Routine Maintenance

To ensure that the SUN2000 can operate properly for a long term, you are advised to perform routine maintenance on it as described in this chapter.

Before cleaning the system, connecting cables, and maintaining the grounding reliability, power off the system.

Table 8-1 Maintenance list

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Alarm ID

Alarm Name

Alarm Severity

Possible Cause

Troubleshooting Suggestion

2001

High String Input Voltage

Major

The PV array is not properly configured. Excessive PV modules are connected in series to the PV string, and therefore the open-circuit voltage exceeds the maximum inverter operating voltage.

Cause ID 1 = PV1 and PV2

Cause ID 2 = PV3 and PV4

Reduce the number of PV modules connected in series to the PV string until the PV string open-circuit voltage is less than or equal to the maximum inverter operating voltage. After the PV array is correctly configured, the inverter alarm disappears.

2002

DC Arc Fault

Major

The PV string power cable arcs or is in poor contact.

Cause ID 1 = PV1 and PV2

Cause ID 2 = PV3 and PV4

Check that the PV string power cable does not arc and is in good contact.

8.3 Troubleshooting

Contact your dealer or Huawei technical support if the measures listed in the Troubleshooting Suggestion column have been taken but the fault persists.

Alarm severities are defined as follows:



Major: The inverter is faulty. As a result, the output power decreases or the grid-tied power generation is stopped.



Minor: Some components are faulty without affecting the grid-tied power generation.



Warning: The inverter works properly. The output power decreases or some authorization functions fail due to external factors.

Table 8-2 Common alarms and troubleshooting measures

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Alarm ID

Alarm Name

Alarm Severity

Possible Cause

Troubleshooting Suggestion

2011

String Reverse Connection

Major

The PV string polarity is reversed.

Cause ID 1 = PV1 Cause ID 2 = PV2 Cause ID 3 = PV3 Cause ID 4 = PV4

Check whether the PV string is reversely connected to the SUN2000. If yes, wait until the PV string current decreases below 0.5 A, set DC SWITCH to OFF, and adjust the PV string polarity.

2012

String Current Backfeed

Warning

The number of PV modules connected in series to this PV string is insufficient. As a result, the end voltage is lower than that of other strings.

Cause ID 1 = PV1 Cause ID 2 = PV2 Cause ID 3 = PV3 Cause ID 4 = PV4

1. Check whether the number of PV

modules connected in series to this PV string is less than the number of PV modules connected in series to the other PV strings connected in parallel with this PV string. If yes, wait until the PV string current decreases below 0.5 A, set DC SWITCH to OFF, and adjust the number of PV modules in the PV string.

2. Check whether the PV string is

shaded.

3. Check whether the open-circuit

voltage of the PV string is normal.

2021

AFCI Self-Check Failure

Major

Cause ID = 1, 2 AFCI check fails.

Turn off the AC output switch and DC input switch, and then turn them on after 5 minutes. If the fault persists, contact your dealer or Huawei technical support.

2031

Phase Wire Short-Circuited to PE

Major

Cause ID = 1 The impedance of

the output phase wire to PE is low or the output phase wire is short-circuited to PE.

Check the impedance of the output phase wire to PE, locate the position with lower impedance, and rectify the fault.

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Alarm ID

Alarm Name

Alarm Severity

Possible Cause

Troubleshooting Suggestion

2032

Grid Loss

Major

Cause ID = 1



The power grid experiences an outage.



The AC power cable is disconnected or the AC circuit breaker is OFF.

1. Check that the AC voltage is

normal.

2. Check that the AC power cable is

connected and that the AC switch is ON.

2033

Grid Undervoltage

Major

Cause ID = 1 The grid voltage is

below the lower threshold or the low voltage duration has lasted for more than the value specified by LVRT.

1. If the alarm occurs accidentally,

the power grid may be abnormal temporarily. The inverter 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. If yes, login to the mobile phone app, SmartLogger, or NMS to modify the grid undervoltage protection threshold with the consent of the local power operator.

3. If the fault persists, check the

connection between the AC switch and the output power cable.

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Alarm ID

Alarm Name

Alarm Severity

Possible Cause

Troubleshooting Suggestion

2034

Grid Overvoltage

Major

Cause ID = 1 The grid voltage

exceeds the higher threshold or the high voltage duration has lasted for more than the value specified by HVRT.

1. If the alarm occurs accidentally,

the power grid may be abnormal temporarily. The inverter automatically recovers after detecting that the power grid becomes normal.

2. If the alarm occurs frequently,

check whether the power grid voltage is within the acceptable range. If no, contact the local power operator. If yes, log in to the mobile app, SmartLogger, or network management system (NMS) to modify the grid overvoltage protection threshold with the consent of the local power operator.

3. Check whether the peak voltage

of the power grid is too high. If the fault persists and cannot be rectified for a long time, contact the power grid operator.

2035

Grid Voltage Imbalance

Major

Cause ID = 1 The difference

between grid phase voltages exceeds the upper threshold.

1. If the alarm occurs accidentally,

the power grid may be abnormal temporarily. The inverter automatically recovers after detecting that the power grid becomes normal.

2. If the alarm occurs frequently,

check whether the power 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 of the AC output power cables.

4. If the AC output power cables are

correctly connected, but the alarm persists and affects the energy yield of the PV plant, contact the local power operator.

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Alarm Name

Alarm Severity

Possible Cause

Troubleshooting Suggestion

2036

Grid Overfrequency

Major

Cause ID = 1 Power grid

exception: The actual grid frequency is higher than the requirement of the local power grid standard.

1. If the alarm occurs accidentally,

the power grid may be abnormal temporarily. The inverter 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 no, contact the local power operator. If yes, log in to the mobile phone app, SmartLogger, or NMS to modify the grid underfrequency protection threshold with the consent of the local power operator.

2037

Grid Underfrequency

Major

Cause ID = 1 Power grid

exception: The actual grid frequency is lower than the requirement of the local power grid standard.

1. If the alarm occurs accidentally,

the power grid may be abnormal temporarily. The inverter 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 no, contact the local power operator. If yes, log in to the mobile phone app, SmartLogger, or NMS to modify the grid underfrequency protection threshold with the consent of the local power operator.

2038

Unstable Grid Frequency

Major

Cause ID = 1 Power grid

exception: The actual grid frequency change rate does not comply with the local power grid standard.

1. If the alarm occurs accidentally,

the power grid may be abnormal temporarily. The inverter 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 no, contact the local power operator.

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Alarm ID

Alarm Name

Alarm Severity

Possible Cause

Troubleshooting Suggestion

2039

Output Overcurrent

Major

Cause ID = 1 The grid voltage

drops dramatically or the power grid is short-circuited. As a result, the inverter transient output current exceeds the upper threshold, and inverter protection is triggered.

1. The inverter monitors its external

working conditions in real time. The inverter automatically recovers after the fault is rectified.

2. If the alarm occurs frequently

and affects the power production of the PV plant, check whether the output is short-circuited. If the fault persists, contact your dealer or Huawei technical support.

2040

Output DC Component Overhigh

Major

Cause ID = 1 The DC component

in the grid current exceeds the upper threshold.

1. The inverter monitors its external

working conditions in real time. The inverter automatically recovers after the fault is rectified.

2. If the alarm occurs frequently,

contact your dealer or Huawei technical support.

2051

Abnormal Residual Current

Major

Cause ID = 1 The

input-to-ground insulation impedance has decreased during the inverter operation.

1. If the alarm occurs accidentally,

the external power cable may be abnormal temporarily. The inverter automatically recovers after the fault is rectified.

2. If the alarm occurs frequently or

persists, check that the impedance between the PV string and ground is not below the lower threshold.

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Alarm Name

Alarm Severity

Possible Cause

Troubleshooting Suggestion

2061

Abnormal Grounding

Major

Cause ID = 1



The neutral wire or ground cable is not connected.



The PV array is grounded, but the inverter output does not connect to an isolation transformer.

Power off the inverter (turn off the AC output switch and DC input switch, and wait for 5 minutes), and then perform the following operations:

1. Check that the PE cable for the

inverter is connected properly.

2. If the inverter is connected to the

TN power grid, check whether the N cable is properly connected and whether the voltage to ground is normal.

3. Check whether the AC output

connects to an isolation transformer. If yes, after powering on the inverter, log in to the mobile phone app, SmartLogger, or NMS and disable Grounding inspection.

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Alarm ID

Alarm Name

Alarm Severity

Possible Cause

Troubleshooting Suggestion

2062

Low Insulation Resistance

Major

Cause ID = 1



The PV array is short-circuited to ground.



The PV array is in a moist environment and the power cable is not well insulated to ground.

1. Check the impedance between

the PV array output and PE, and eliminate short circuits and poor insulation points.

2. Check that the PE cable for the

inverter is connected correctly.

3. If you are sure that the

impedance is less than the preset protection threshold in a cloudy or rainy environment, log in to the mobile phone app, SmartLogger, or NMS and reset the insulation impedance protection threshold.

Current insulation resistance: x

MΩ, possible short circuit

position: x%. The short circuit position is valid for a single PV string. If there are multiple PV strings, check the PV strings one by one. For details, see

F Locating Insulation Resistance Faults.

For details about how to query the low insulation resistance alarm, the

HUAWEI SUN2000-8-20KTL-M2 Inverter Low Insulation Resistance Fault Indication Guide.

2063

Cabinet Overtemperatur e

Minor

Cause ID = 1



The inverter is installed in a place with poor ventilation.



The ambient temperature exceeds the upper threshold.



The inverter is not working properly.



Check the ventilation and ambient temperature at the inverter 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 both meet requirements, contact your dealer or Huawei technical support.

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Alarm ID

Alarm Name

Alarm Severity

Possible Cause

Troubleshooting Suggestion

2064

Device Fault

Major

Cause ID = 1–12 An unrecoverable

fault has occurred on a circuit inside the inverter.

Turn off the AC output switch and DC input switch, and then turn them on after 5 minutes. If the fault persists, contact your dealer or Huawei technical support.

Note: If the cause ID is ID 1, perform the preceding operation when the PV string current is less than 1 A.

2065

Upgrade Failed or Version Mismatch

Minor

Cause ID = 1, 2 and 4

The upgrade ends abnormally.

NOTE

Upgrade the inverter again if it is stuck in initialization state without generating any alarms and cannot be restored to the normal state during the upgrade when the PV inputs are disconnected and reconnected next time.

1. Upgrade again.

2. If the upgrade fails several times,

contact your dealer or Huawei technical support.

2066

License Expired

Warning

Cause ID = 1



The privilege certificate has entered the grace period.



The privilege feature will be invalid soon.

1. Apply for a new certificate.

2. Load the new certificate.

61440

Faulty Monitoring Unit

Minor

Cause ID = 1



The flash memory is insufficient.



The flash memory has bad sectors.

Turn off the AC output switch and DC input switch, and then turn them on after 5 minutes. If the fault persists, replace the monitoring board or contact your dealer Huawei technical support.

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Alarm ID

Alarm Name

Alarm Severity

Possible Cause

Troubleshooting Suggestion

2067

Faulty Power Collector

Major

Cause ID = 1 Power meter

disconnection.

1. Check that the preset power

meter model is the same as the actual model.

2. Check that the preset

communications parameters for the power meter are the same as the actual configurations.

3. Check that the power meter is

powered on and the RS485 communications cable is connected.

2072

Transient AC Overvoltage

Major

Cause ID = 1 The inverter detects

that the phase voltage exceeds the transient AC overvoltage protection threshold.

1. Check whether the grid

connection voltage exceeds the upper threshold. If yes, contact the local power operator.

2. If you have confirmed that the

grid connection voltage exceeds the upper threshold and obtained the consent of the local power operator, modify the overvoltage protection threshold.

3. Check that the peak grid voltage

does not exceed the upper threshold.

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Alarm ID

Alarm Name

Alarm Severity

Possible Cause

Troubleshooting Suggestion

2080

Abnormal PV Module Configuration

Major

PV module configuration does not meet requirements, or the PV module output is reversely connected or short-circuited.

Cause ID = 2, 3, 6, 7, 8, 9



2: The PV string power or the number of PV modules connected in series exceeds the upper threshold.



3: The PV string voltage is low or the number of PV modules connected in series is less than the lower threshold.



6: The PV string or parallel connection is abnormal.



7: The string configuration is changed.



8: The sunlight is abnormal.



9: The PV string voltage exceeds the upper threshold.

Check whether the total number of PV modules, number of PV modules in a string, and number of PV strings meet requirements and whether the PV module output is reversely connected.



ID2: Check whether the PV string power or the number of PV modules connected in series in the PV string exceeds the upper threshold.



ID3:

1. Check whether the number of optimizers connected in series in the PV string is below the lower threshold.

2. Check whether the PV string output is reversely connected.

3. Check whether the PV string output is disconnected.

4. Check whether the optimizer output extension cable is correct (positive connector at one end and negative connector at the other).



ID6:

1. Check whether the number of optimizers connected in series in the PV strings connected in parallel under the same MPPT is the same.

2. Check whether the optimizer output extension cable is correct (positive connector at one end and negative connector at the other).



ID7: When the sunlight is normal, perform the optimizer search function again.



ID8: When the sunlight is normal, perform the optimizer search function again.



ID9: Calculate the PV string voltage based on the number of PV modules in the PV string and check whether the PV string voltage exceeds the upper threshold of the inverter input

Huawei SUN2000-(8KTL-20KTL)-M2 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

About This Document

Contents

1 Safety Information

1.1 General Safety

1.2 Personnel Requirements

1.3 Electrical Safety

1.4 Installation Environment Requirements

1.5 Mechanical Safety

1.6 Commissioning

1.7 Maintenance and Replacement

2 Overview

2.1 Product Introduction

2.2 Appearance

2.3 Label Description

2.3.1 Enclosure Labels

2.3.2 Product Nameplate

2.4 Working Principles

2.4.1 Circuit Diagram

2.4.2 Working Modes

3 Storage

4 Installation

4.1 Checking Before Installation

4.2 Tools

4.3 Determining the Installation Position

4.3.1 Environment Requirements

4.3.2 Space Requirements

4.4 Moving an Inverter

4.5 Installing the Mounting Bracket

4.5.1 Wall-mounted Installation

4.5.2 Support-mounted Installation

5 Electrical Connections

5.1 Preparing for Installation

5.2 Connecting the PE cable

5.3 Connecting the AC Output Power Cable

5.4 Connecting the DC input power cable

5.5 (Optional) Installing the Smart Dongle

5.6 (Optional) Installing the Signal Cable

5.6.1 Connecting the RS485 Communications Cable (Inverter Cascading)

5.6.2 Connecting the RS485 Communications Cable (Smart Power Sensor)

5.6.3 Connecting the Rapid shutdown signal cable

5.6.4 Connecting the Power Grid Scheduling Signal Cable

6 Commissioning

6.1 Check Before Power-On

6.2 Powering On the System

7 Man-Machine Interaction

7.1 App Commissioning

7.1.1 Downloading the FusionSolar App

7.1.2 (Optional) Registering an Installer Account

7.1.3 Creating a PV Plant and a User

7.1.4 (Optional) Setting the Physical Layout of the Smart PV Optimizers

7.1.5 Detect optimizer disconnection

7.2 Parameters Settings

7.2.1 Energy Control

7.2.1.1 Grid-tied Point Control

7.2.2 AFCI

7.2.3 IPS Check (for Italy CEI0-21 Grid Code Only)

7.3 SmartLogger Networking Scenario

8 Maintenance

8.1 System Power-Off

8.2 Routine Maintenance

8.3 Troubleshooting