Huawei SUN2000-55KTL, SUN2000-60KTL Quick Manual

HUAWEI TECHNOLOGIES CO., LTD.

SUN2000-(55KTL, 60KTL) Series

Quick Guide

Issue: 01
Part Number: 31508435
Date: 2017-06-15

Copyright © Huawei Technologies Co., Ltd. 2017.
All rights reserved.

1

Product Overview

Indicator Description

Front View

1

Indicator
Status

Description

PV connection
indicator

DC input
detection
status

Blinking green

The DC input is normal.

Blinking red

DC input detection is in progress.

Steady red

The DC input is abnormal.
PV string

connection
status

Steady green

At least one PV string is properly connected, and
the DC input voltage of the corresponding MPPT
circuit is higher than or equal to 600 V.

Off

The SUN2000 disconnects from all PV strings, or
the DC input voltage of each MPPT circuit is less
than 600 V.

Grid-tied
indicator

Steady green

The SUN2000 has connected to the power grid.

Off

The SUN2000 does not connect to the power grid.

NOTICE

1. 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.

2. Before device installation, carefully read the SUN2000-(55KTL, 60KTL) Series User Manual to
get familiar with product information and precautions. You can log in to
http://support.huawei.com/carrier/, and search for SUN2000 on the Product Support tab page
to view or obtain the user manual.

3. Only qualified and trained electrical technicians are allowed to operate the device. Operators
should understand the components and functioning of a grid-tied PV power system, and they
should be familiar with relevant local standards.

4. Before installing the device, check that package contents are intact and complete against the
packing list. If any damage is found or any component is missing, contact the dealer.

5. Use insulated tools when installing the device. For personal safety, wear insulation gloves and
protective shoes.

6. The device warranty does not cover the following conditions:

• The warranty label is removed.

• The device is damaged due to violation of the storage, transportation, installation, and

operation regulations specified in this document and user manual.

(1) PV connection indicator
(2) Grid-tied indicator
(3) Communication indicator
(4) Alarm/Maintenance indicator
(5) Maintenance compartment door
(6) Host panel cover

Ports

2

Indicator
Status

Description

Communication
indicator

Blinking green

The SUN2000 receives data
over RS485 or PLC
communication.

Off

The SUN2000 has not received
data over RS485 or PLC
communication for 10 seconds.

Alarm/Maintenan
ce indicator

Alarm status

Blinking red at long intervals (on
for 1s and then off for 4s)

A warning alarm is generated.

Blinking red at short intervals (on
for 0.5s and then off for 0.5s)
A minor alarm is generated.

Steady red

A critical alarm is generated.
Local

maintenance
status

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

Local maintenance is in
progress.

Blinking green at short intervals
(on for 0.125s and then off for

0.125s)
Local maintenance fails.

Steady green

Local maintenance succeeds.

Waterproof cable connector is abbreviated as waterproof connector in the following text.

NOTE

(1) Waterproof cable connector (AC OUTPUT 1)
(2) Waterproof cable connector (RESERVE)

(3) USB port (USB)

(4) DC switch 1 (DC SWITCH 1)

(5) DC switch 2 (DC SWITCH 2)

(6) Waterproof cable connector (COM1, COM2,
and COM3)

(7) DC input terminals (controlled by DC
SWITCH 1)

(8) DC input terminals (controlled by DC
SWITCH 2)

3

2

Installation Requirements

Installation Angle

2.1

SUN2000 Dimensions

Mounting Bracket Dimensions

Installation Space

2.2

4

For ease of installing the SUN2000
on the mounting bracket,
connecting cables to the bottom of
the SUN2000, and maintaining the
SUN2000 in future, it is
recommended that the bottom
clearance be between 600 mm
and 730 mm.

NOTE

3

Installing the SUN2000



The SUN2000 mounting bracket has four groups of tapped holes, each group containing four
tapped holes. Mark any hole in each group based on site requirements and mark four holes in
total. Two round holes are preferred.



The bolts supplied with the SUN2000-60KTL-HV-D1 are M12x40 bolt assemblies. The bolts
supplied with other models of SUN2000s are M12x60 expansion bolts and M12x40 bolt
assemblies. If the bolt length does not meet the installation requirements, prepare M12 bolt
assemblies by yourself and use them together with the delivered M12 nuts.



The following describes how to install the SUN2000 by using support installation as an example.
For details about wall-mounted installation, see the SUN2000-(55KTL, 60KTL) Series User
Manual .

NOTE

Round

holes

5

1. Set the security torx wrench aside after removing it from the mounting bracket.

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

NOTE

Electrical Connections

4

Installing the Ground Cable

4.1

4

• The ground point on the enclosure is preferred to connect to the PE cable for the SUN2000.

• The ground point in the maintenance compartment is mainly used for connecting to the ground
cable included in the multi-core AC power cable. For details, see section “ 4.3 Installing AC
Output Power Cables“.

• You need to prepare M6 OT terminals by yourself.

• The outdoor copper-core cable with a cross-sectional area of 16 mm2 is recommended. The

ground cable must be secured.

• It is recommended that PGND cable of the SUN2000 be connected to the nearest ground point.
For a system with multiple SUN2000s connected in parallel, connect the ground points of all
SUN2000s to ensure equipotential connections to ground cables.

• To enhance the corrosion resistance of the PE terminal, apply silica gel or paint on it after
connecting the PGND cable.

NOTE

6

1. Loosen the two screws on the maintenance compartment door using a security torx wrench.

Opening the Maintenance Compartment Door

4.2

1. Never open the host panel of the SUN2000.

2. Before opening the maintenance compartment door, turn off the downstream AC output switch
and the two DC switches at the bottom.

3. If you need to open the maintenance compartment door on rainy or snowy days, take protective
measures to prevent rain and snow entering the maintenance compartment. If it is impossible to
take protective measures, do not open the maintenance compartment door on rainy or snowy
days.

4. Do not leave unused screws in the maintenance compartment.

WARNING

7

2. Open the maintenance compartment door and install the support bar, which is bound to the
inductor cover at the bottom of the chassis.

3. Remove the cover and hang it on the hook of the chassis door.

If the screws on the chassis door are lost, obtain spare screws from the fitting bag bound to the
inductor cover at the bottom of the chassis.

NOTE

8

a. Three-core cable (excluding the ground cable and neutral wire)

1. Remove an appropriate length of the jacket and insulation layer from the AC output power
cable using a wire stripper. (Ensure that the jacket is in the maintenance compartment.)

b. Four-core cable (including the ground cable but excluding the neutral wire)

Jacket Insulation layer Core wire

2. Prepare OT terminals.

Installing AC Output Power Cables

4.3



You need to prepare M8 OT terminals by yourself.



If you connect a ground cable to the ground point on the chassis shell, you are advised to use a
three-core outdoor copper-core cable with a cross-sectional area of 25 mm2 as the AC output
power cable.



If you connect a ground cable to the ground point in the maintenance compartment, you are
advised to use a four-core outdoor copper-core cable with a cross-sectional area of 25 mm2 as
the AC output power cable.



For more details about cable specifications, see the SUN2000-(55KTL, 60KTL) Series User
Manual .

NOTE

Core wire

Insulation layer

Heat
gun

Hydraulic pliers

Heat shrink
tubing

4. Land the AC output power cable in the terminal block, and tighten the nuts with a
torque wrench to achieve a proper torque value.

9

Ensure that AC terminations provide firm and solid electrical connections. Failing to do so may
cause SUN2000 malfunction and damage to its components, even start thermal events.

NOTICE

3. Route the cable through the waterproof connector.

For ease of connecting the AC output power cable, you are advised to remove the nut assembly
from the AC terminal and save it for later use, and then route the cable through the waterproof
connector.

NOTE

a. Three-core cable (excluding the ground cable)

b. Four-core cable (including the ground cable)

10

Installing DC Input Power Cables

4.4

Selecting DC Input Terminals

Number of Inputs
SUN2000

1

Connects to set 1.

2

Connects to routes 1 and 5.

3

Connects to routes 1, 3, and 5.

4

Connects to routes 1, 3, 5, and 7.

5

Connects to routes 1, 2, 3, 5, and 7.

6

Connects to routes 1, 2, 3, 5, 6, and 7.

7

Connects to routes 1, 2, 3, 4, 5, 6, and 7.

8

Connects to routes 1, 2, 3, 4, 5, 6, 7, and 8.

The SUN2000 provides two DC switches,
named as, DC SWITCH 1 and DC
SWITCH 2. DC SWITCH 1 controls the
first to fourth sets of DC input terminals,
whereas DC SWITCH 2 controls the fifth to
eighth sets of DC input terminals.

NOTE



Ensure that the PV string is well insulated to the ground.



Before inserting the positive and negative connectors respectively into the positive and
negative DC input terminals of the SUN2000, check that the DC voltage does not exceed
1500 V using a multimeter and that the cables are connected correctly. Otherwise, the
SUN2000 will be damaged.

WARNING

1. Use the Amphenol UTX DC input terminals delivered with the SUN2000.

2. Before connecting DC input power cables, label the cable polarities to ensure correct cable
connections. If the cables are connected incorrectly, the SUN2000 may be damaged.

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

4. Connect the positive and negative connectors to the appropriate positive and negative DC
input terminals. Then pull the DC input power cables to ensure that they are connected
securely.

5. If polarity of the DC input power cable is reversed and the DC switch is ON, do not turn off the
DC switch immediately or unplug positive and negative connectors. The device may be
damaged if you do not follow the instruction. The caused equipment damage is beyond the
warranty scope. Wait until the solar irradiance declines and the PV string current reduces to
below 0.5 A, and then turn off the two DC switches and remove the positive and negative
connectors. Correct the string polarity before reconnecting the string to the SUN2000.

NOTICE

11



If the voltage is a negative value, the DC input polarity is incorrect. Correct the polarity.



If the voltage is greater than 1500 V DC, too many PV modules configured to the same string.
Remove some PV modules.



Only after at least one PV string correctly connects to the MPPT1 circuit, can the SUN2000
enables the DC input detection function. Therefore, you are advised to connect DC input power
cables to the MPPT1 circuit first.

NOTICE

Selecting a Communication Mode

4.5

The SUN2000 supports either PLC or RS485 communication mode.



If PLC is used, you do not have to connect any communications cable to the SUN2000, but
have to connect the PLC CCO module or SmartLogger2000 to the AC power cable. For detailed
operations, see the PLC CCO01A User Manual or SmartLogger2000 User Manual.



If RS485 is used, do not connect the PLC CCO module to the AC power cable.

NOTE

Positive connector

Negative
connector

Positive metal terminal

Negative metal terminal

Ensure that the cable
cannot be removed after
crimped.

H4TC0001

(Amphenol)

Click

Recommended: PV cable
that meets the 1500 V
standard

H4TW0005

（Amphenol）

Ensure
that the
locking
nut is
secured.

Use a multimeter
to measure the
DC voltage.

12

Installing the RS485 Communications Cable

4.6

Terminal Block Connection (Recommended)

The DJYP2VP2-22 2x2x1 computer cable or a communications cable with a conductor cross­sectional area of 1 mm2 and outer diameter of 14–18 mm is recommended.

1. Remove an appropriate length of the jacket and core wire insulation layer from the
communications cable using a wire stripper.

1. When routing communications cables, separate communications cables from power cables to
prevent communication from being affected by signal interference.

2. An RS485 cable can connect to either a terminal block or an RJ45 network port. It is
recommended that the RS485 cable connect to a terminal block.

NOTICE

2. Remove the cable terminal base from the terminal block. Connect the communications cable to
the terminal base.

No.

Port Definition
Description

1

RS485A IN

RS485A, RS485
differential signal+

2

RS485A OUT

RS485A, RS485
differential signal+

3

RS485B IN

RS485B, RS485
differential signal–

4

RS485B OUT

RS485B, RS485
differential signal–

4. Install the terminal base on the terminal block,
and connect the shield layer to the ground point.

3. Route the cable through the waterproof
connector.

13

5. Bind the communications cable.

1. When connecting the shielded cable, choose
whether to crimp the OT terminal based on site
requirements.

2. To ensure airtightness, you are advised to apply
firestop putty to the used waterproof connectors at
the bottom of the chassis.

NOTE

No.

Color

Pin Definition

1

White-and-orange

RS485A, RS485
differential signal+

2

Orange

RS485B, RS485
differential signal–

3

White-and-green

N/A

4

Blue

RS485A, RS485
differential signal+

5

White-and-blue

RS485B, RS485
differential signal–

6

Green

N/A

7

White-and-brown

N/A

8

Brown
N/A

1. Prepare an RJ45 connector.

You are recommended to use a CAT 5E outdoor
shielded network cable with an outer diameter less
than 9 mm and internal resistance not greater than

1.5 ohms/10 m, as well as a shielded RJ45 connector.

RJ45 Network Port Connection

2. Route the cable through the waterproof
connector.

3. Insert the RJ45 connector into the RJ45 network
port in the SUN2000 maintenance compartment.

14

4. Bind the communications cable.

To ensure airtightness, you are advised to apply
firestop putty to the used waterproof connectors
at the bottom of the chassis.

NOTE

5

Checking After Installation

1. The SUN2000 is installed correctly and securely.

Yes □ No □ N/A □

2. The DC switches and downstream AC switch are OFF.

Yes □ No □ N/A □

3. All ground cables are connected securely, without open circuits
or short circuits.

Yes □ No □ N/A □

4. AC output power cables are connected correctly and securely,
without open circuits or short circuits.

Yes □ No □ N/A □

5. DC input power cables are connected correctly and securely,
without open circuits or short circuits.

Yes □ No □ N/A □

6. The RS485 communications cable is connected correctly and
securely.

Yes □ No □ N/A □

7. All used waterproof connectors at the chassis bottom are
applied with firestop putty.

Yes □ No □ N/A □

8. The AC terminal cover is reinstalled.

Yes □ No □ N/A □

9. The maintenance compartment door is closed and the door
screws are tightened.

Yes □ No □ N/A □

10.Idle DC input terminals are sealed.

Yes □ No □ N/A □

11.Idle USB ports are plugged with waterproof plugs.

Yes □ No □ N/A □

12.Idle waterproof connectors are plugged and the locking caps are
tightened.

Yes □ No □ N/A □

6

DC Input Detection

15



Only after at least one PV string correctly connects to the MPPT1 circuit, the SUN2000 enables
the DC input detection function. Therefore, you are required to connect DC input power cables
to the MPPT1 circuit first.



The DC input detection function allows only independent access from each PV string to the
inverter. That means, the PV strings cannot be connected in parallel and then to the inverter.



The DC input detection only functions when the two DC switches onSUN2000 are OFF.

NOTICE

After the DC input power cable connects to the SUN2000 of this model, the SUN2000 detects the
DC input voltage of each route using the power generated by PV modules. After one PV string
correctly connects to the MPPT1 circuit, the SUN2000 can start the DC input detection function. DC
input detection can be performed automatically or manually.

The following table describes the LED indicator status and buzzer status under the condition that
the SUN2000 is detecting the DC input.

PV Connection
Indicator Status

Buzzer Status
Meaning

Blinking red

No sound

DC input detection is in progress.

Blinking green
No sound

The DC input is normal.

Steady red
Buzzing

The DC input is abnormal.

Automatic Detection

Following are the rules for starting automatic detection:

• Initial automatic detection is triggered 2 minutes after at least one PV string correctly connects to
the MPPT1 circuit.

• Within three days after initial automatic detection is triggered, the SUN2000 performs automatic
detection once every 10 minutes. From the fourth day, the SUN2000 performs automatic
detection only when the PV string voltage equals the lowest operating voltage of the SUN2000.

Perform manual detection by pressing the DC input detection button or using the SUN2000 app as

showing below:

• Once the DC input detection triggered, the detection process can’t be aborted or restarted until

detection cycle completed.

• The audible alarm can be manually turned off by pressing DC input detection button twice.

Manual Detection

DC Input detection button

SUN2000 Bluetooth module Mobile phone

1. Turn on the AC switch between the SUN2000 and the power grid.

2. Ensure that the DC switches at the inverter bottom are ON.

3. (Optional) Measure the temperatures at the joints between DC terminals and connectors using a
point-test thermometer.

16



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



Before turning on the DC switches on the SUN2000, ensure that the DC input power cable is
connected correctly.

NOTICE

To ensure that the DC terminals are in good contact, check the temperatures at the joints between
DC terminals and connectors after the SUN2000 has been running for a period of time. Ensure that
the temperature rise does not exceed 40°C.

NOTE

7

Powering On the System

SUN2000 App

8

Connection over a Bluetooth Module

Data Cable Connection

SUN2000 USB data cable Mobile phone

1. The SUN2000 app enables the SUN2000 to communicate with the monitoring system through
a USB data cable or Bluetooth for you to query alarms, configure parameters, and perform
routine maintenance. The SUN2000 app is a convenient platform for local monitoring and
maintenance. The app name is SUN2000.

2. Mobile phone operating system: Android 4.0 or later, iOS 7.0 or later. When the iOS is used,
the app supports only Bluetooth connection.

3. Access the Huawei app store (http://appstore.huawei.com), Google Play
(https://play.google.com), or App Store (iOS), search for SUN2000, and download the
SUN2000 app software package.

4. Connect a USB data cable or a Bluetooth module to the USB port of the SUN2000 to enable
the communication between the SUN2000 and the app.

NOTE

9

FAQ

How Should I View Active Alarms?

Connect a USB data cable or a Bluetooth module to the USB port of the SUN2000 to enable the
communication between the SUN2000 and the app. After login, tap Alarm on the main menu to
display the Active Alarm screen.

10

Troubleshooting

Symptom

Possible Cause
Suggestion

The PV string is
connected reversely.

The PV string cables are
connected reversely during
the SUN2000 installation.

Wait until the solar irradiance declines at night
and the PV string current reduces to below 0.5
A. Then, turn off the two DC switches, remove
the positive and negative connectors, and
rectify the connection of the DC input power
cable.

Login screen

Selecting a

connection mode

Main menu

screen

Connecting

Bluetooth

Switching

between users

Quick

settings

17



The preset passwords for Common User,
Advanced User, and Special User are
00000a.



Use the preset password upon initial login. To
ensure account security, change the password
immediately after login.



The screen snapshots in this document
correspond to app V200R001C20SPC010
(Android).

NOTICE

By default, the SUN2000 can be grid-tied and you
do not have to set parameters. You can modify
the parameters based on site requirements. For
details about parameter configuration, see the
SUN2000 APP User Manual.

NOTE

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