Huawei SUN2000-15KTL-50KTL Series User manual

Replacing SUN2000-(15KTL-50KTL) Series with
SUN2000-(15KTL-50KTL)-M3 Series
Quick Guide
Issue: 03
Part number: 31500FWV
Date: 2021-05-25
HUAWEI TECHNOLOGIES CO., LTD.

1
1Removing the Original SUN2000
Remove the original
SUN2000 Install the new SUN2000 Perform electrical
connection
Verify the installation and
power on the SUN2000
Set spare part model
parameters
Start
End
1. The information in this document is subject to change due to version upgrade or other
reasons. 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 replacing the device, carefully read the Replacing SUN2000-(15KTL-50KTL) Series with
SUN2000-(15KTL-50KTL)-M3 Series User Manual to get familiar with product information
and precautions.
3. Before replacing the device, check whether the SUN2000 settings can be viewed. If yes,
record them for setting or checking parameters after the replacement.
Original Model
Number of
PV Strings
Replacement Model
SUN2000
-
15KTL
6
SUN2000
-15KTL-M3
SUN2000
-
17KTL
6
SUN2000
-17KTL-M3
SUN2000
-
20KTL
6
SUN2000
-20KTL-M3
SUN2000
-
23KTL
6
SUN2000
-23KTL-M3
SUN2000
-
28KTL
6
SUN2000
-28KTL-M3
Before removing the original SUN2000, ensure that the DC switch on the SUN2000 and all
the switches connected to the SUN2000 are set to OFF. Otherwise, the high voltage of the
SUN2000 may result in electric shocks.
After the SUN2000 is powered 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.
1. Power off the SUN2000 to be replaced.
2. Remove the AC connector.
Copyright © Huawei Technologies Co., Ltd. 2021.
All rights reserved.
a) Use a screwdriver to press the locking
plate on the AC output terminal.
b) Rotate the AC output connector
counterclockwise.
c) Remove the AC output connector.
SUN2000 V100R001 Replacement Scenario

2
4. Remove the DC connectors. 5. Remove the RS485 communications cable.
3. Remove the AC power cables.
6. Remove the PE cable.

3
7. (Optional) Open the antitheft lock. 8. Remove the two hexagonal screws.
9. Remove the SUN2000 from the back panel. 10.Remove the nuts, spring washers, and flat
washers, and then remove the back panel.

4
Mounting Bracket Dimensions
The mounting bracket has six groups of mounting holes, which are used to adjust the
installation height of the SUN2000.
In the SUN2000 V100R001 replacement scenario, it is recommended that the mounting bracket
be secured at hole 2. If it is difficult to connect cables at this height, select holes based on the
original cable length. The AC power cable length requirements should be preferentially met.
Recommended
holes
2Installing the SUN2000-(15KTL-28KTL)-M3 Series

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3. Install the SUN2000 onto the mounting
bracket.
4. Tighten the screws on both sides of the
SUN2000.
1. Install the two mounting brackets together. 2. Align the mounting holes and install the
new mounting bracket.
Connect cables in accordance with local installation laws and regulations.
Before connecting cables, ensure that the DC switch on the SUN2000 and all the switches
connected to the SUN2000 are set to OFF. Otherwise, the high voltage of the SUN2000 may
result in electric shocks.
Do not connect the neutral wire to the enclosure as a PE cable. Otherwise, electric shocks may
occur.
The mounting holes of the engineering mounting kits must be identical to the original one. The
mounting holes can be directly aligned with those on the support. However, if you install the
mounting bracket on a wall, you need to make new holes.
3Connecting a PE Cable

6
1. Remove the AC terminal box and install partition boards.
Use a socket wrench and extension rod to connect the AC power cable. The extension rod
must be longer than 100 mm.
Do not install third-party devices in the AC connection box.
OT terminals are shipped with the SUN2000 package. The delivered OT terminals apply only
to cables of 8 mm2/10.0 mm2(7 AWG/8 AWG). For other types of cables, you need to
prepare OT terminals.
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.
It is recommended that silica gel or paint be used around the ground terminal after the PE
cable is connected.
Reserved PE point
4Connecting the AC Output Power Cable

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2. Connect the AC output power cable (using a four-core cable as an example).

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1. Before connecting DC input power cables, ensure that the original DC terminals have been
cut off. If the original DC connector is directly connected to the SUN2000-(15KTL-50KTL)-M3
series, the inverter may be burnt.
2. Use the positive and negative Staubli MC4 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
warranty.
3. You are advised to use the PV-CZM-22100 (Staubli) crimping tool and do not use it with the
positioning block. Otherwise, the metal terminals may be damaged. The PV-MS (Staubli) or
PV-MS-HZ (Staubli) open-end wrench is recommended.
4. Ensure that the PV module output is well insulated to ground.
5. The DC input voltage of the SUN2000 shall not exceed 1100 V DC under any circumstance.
6. Before installing DC input power cables, label the cable polarities to ensure correct cable
connections.
7. If a DC input power cable is reversely connected and the DC switch is turned on, do not
perform operations on the DC switch or the positive/negative connectors immediately.
Otherwise, the device may be damaged. The caused device damage is not covered under any
warranty. Wait until the night when solar irradiance declines and the PV string current drops
to below 0.5 A. Then set the DC switch to the OFF position, remove the positive and negative
connectors, and correct the polarity of the DC input power cable.
1. Cut off the original DC terminals.
DC Input Terminal Selection
In the spare part replacement scenario, the DC
input power cables can be connected only to PV1–
PV6. If the DC input power cables are connected
to PV7 or PV8, the inverter data cannot be
transmitted to the northbound device.
Number
of Inputs
Terminal
Number of
Inputs
Terminal
1
PV1
-PV6
2
PV1 and PV3
3
PV1, PV3, and PV5
4
PV1, PV2, PV3, and PV5
5
PV1, PV2, PV3, PV4, and PV5
6
PV1, PV2, PV3, PV4, PV5, and PV6
5Connecting DC Input Power Cables

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2. Connect the DC power cables.
Positive connector
Negative
connector
Positive metal
terminal
Negative
metal terminal
Ensure that the cables
cannot be pulled out
after being crimped.
Click
Click
PV-CZM-22100
PV-MS-HZ
Open-end
wrench
Ensure that
cable polarities
are correct.
Use the wrench
shown in the figure
to tighten the locking
nut. When the
wrench slips during
the tightening, the
locking nut has been
tightened.
If the original DC input power cables are not long enough, use the DC input extension cables
delivered with the package.
Click
Pull the DC input power cables back to
ensure that they are connected securely.
Extension cables for DC terminals

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Communications Port Signal Definitions
Before Replacement
-RJ45
Network Port
SUN2000
-(15KTL-50KTL)-M3 Series (COM Port)
No.
Color
Definition
No.
Definition
Function
1
White and orange
RS485A
1
485A1
-1
RS485 differential signal +
4
Blue
RS485A
2
485A1
-2
RS485 differential signal +
2
Orange
RS485B
3
485B1
-1
RS485 differential signal
–
5
White and blue
RS485B
4
485B1
-2
RS485 differential signal
–
–
–
–
5
PE
Shield layer grounding
–
–
–
6
PE
Shield layer grounding
Before
Replacement
After
Replacement
The figures show the RJ45 connector when the surface without the fastener faces upwards. If
the colors and functions of the wires are different, connect the wires based on their functions.
6Connecting Signal Cables

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(Optional) Cascaded SUN2000s
2. Connect the signal cables to the signal cable connector.
Ensure that the protection layers of the cables are inside the connector, that excess core wires
are cut off from the protection layer, that the exposed core wires are totally inserted into the
cable hole, and that the cable is connected securely.
1. If the original signal cable is connected through RJ45 network ports, cut off the RJ45
connectors.

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3. Connect the signal cable connector to the communications port.
Communications
port (COM)
Scenario Where No Signal Cable Is Connected
If no signal cable is connected to the SUN2000, use a waterproof plug to block the cable hole of
the signal cable connector and connect the signal cable connector to the communications port
on the SUN2000 to improve the waterproof performance.

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No.
Acceptance Criteria
1
The SUN2000 is installed correctly and securely.
2
Cables are routed properly as required by the customer.
3
The communications expansion module is installed correctly and securely.
4
Cable ties are secured evenly and no burr exists.
5
The PE cable is connected correctly, securely, and reliably.
6
The DC switch and all the switches connected to the SUN2000 are set to OFF.
7
The AC output power cable, DC input power cables, and signal cables are connected correctly
and securely.
8
Unused terminals and ports are locked by watertight caps.
9
The installation space is proper, and the installation environment is clean and tidy.
Before turning on the AC switch between the SUN2000 and the power grid, check that the AC
voltage is within the specified range using a multimeter.
1. Turn on the AC switch between the SUN2000 and the power grid.
2. Turn on the DC switch at the bottom of the SUN2000.
3. Observe the LED indicators to check the operating status of the SUN2000.
Classification
Status
Description
Running
indication
–
Steady green
Steady green
The SUN2000 is operating in grid
-tied
mode.
Blinking green
slowly
Off
The DC is on and the AC is off.
Blinking green
slowly
Blinking green slowly
Both the DC and AC are on, and the
SUN2000 is not supplying power to the
power grid.
Off
Blinking green slowly
The DC is off and the AC is on.
Off
Off
Both the DC and AC are off.
Blinking red fast
–
DC environmental alarm
–
Blinking red fast
AC environmental alarm
Steady red
Steady red
Faulty
Communicati
ons indicator
–
Blinking green fast
Communication is in progress.
Blinking green slowly
Mobile phone access
Off
No communication
Note: If LED1, LED2, and LED3 are steady red, the SUN2000 is faulty and needs to be replaced.
Blinking Slowly: On for 1s and Off for 1s; Blinking Fast: On for 0.2s and Off for 0.2s
7Verifying the Installation
8Powering On the System

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2. Connect to the SUN2000 WLAN and log in as user installer.
1. Access the HUAWEI AppGallery (http://appstore.huawei.com), search
for SUN2000, and download the app installation package. You can
also scan the QR code below to download the app.
SUN2000 app
3. Choose Maintenance > Device replacement from the main menu. On the page that is
displayed, click select a device replacement type, and set related parameters.
4. (Optional) If you need to set other parameters, tap Settings.
The initial inverter WLAN password is provided in the nameplate on
the side of the inverter.
A backup nameplate is delivered with the SUN2000 package.
At the first login, the
Quick settings screen is
displayed by default. Exit
the quick settings.
9Setting Parameters for Replacing a SUN2000

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1Removing the Original SUN2000
Original Model
Number of
PV Strings
Replacement Model
SUN2000
-33KTL
6
SUN2000
-30KTL-M3
SUN2000
-33KTL-
E001
6
SUN2000
-30KL-A
6
SUN2000
-40KTL
6
SUN2000
-36KTL-M3
SUN2000
-25KTL-US
6
SUN2000
-25KTL-
NAM3
SUN2000
-30KTL-US
6
SUN2000
-30KTL-
NAM3
4. Remove the AC power cable. The SUN2000-
40KTL is used as an example.
3. Install the support bar and remove the AC
terminal cover.
1. Power off the SUN2000 to be replaced.
2. Open the maintenance compartment door.
If the AC terminal of the original inverter is a 3-pin terminal, use an M8 torque wrench to
remove the terminal.
If the AC terminal of the original inverter is a 4-pin terminal, use an M6 torque wrench to
remove the terminal.
5. Remove the DC connectors.
SUN2000 V200R001 Replacement Scenario

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6. Remove the signal cables.
Connecting to a Terminal Block
Connecting to an RJ45 Network Port
7. Remove the PE cable.

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8. (Optional) Open the antitheft lock. 9. Remove the two hexagonal screws.
10.Remove the SUN2000 from the back panel. 11.Remove the nuts, spring washers, and flat
washers, and then remove the back panel.

18
The mounting bracket has six groups of mounting holes, which are used to adjust the
installation height of the SUN2000.
In the SUN2000 V200R001 replacement scenario, it is recommended that the mounting
bracket be secured at hole 5. If it is difficult to connect cables at this height, select holes
based on the original cable length. The AC power cable length requirements should be
preferentially met.
Mounting Bracket Dimensions
Recommended
holes
2Installing the SUN2000-(25KTL-36KTL)-M3 Series

19
3. Install the SUN2000 onto the mounting
bracket.
4. Tighten the screws on both sides of the
SUN2000.
1. Install the two mounting brackets together. 2. Align the mounting holes and install the
new mounting bracket.
The mounting holes of the engineering mounting kits must be identical to the original one. The
mounting holes can be directly aligned with those on the support. However, if you install the
mounting bracket on a wall, you need to make new holes.