Wintersun WTS CORE Series Bedienungsanleitung

WTS CORE Series Battery Service Manual

V1.2

WTS Power-CORE 1.0 5.36/ 8.04/ 10.72/ 13.40

WTS Energy-CORE 1.0 9.6/ 12.8/ 16.0/ 19.2/ 22.4/ 25.6

Make sure to always use the latest version of this service document,

available at: https://wintersun.de/downloads/

Content

1. Overview................................................................................................................................................................ 3

1.1 Claim and Contact...................................................................................................................................................... 3

1.2 General Steps............................................................................................................................................................... 4

2. Error Analysis........................................................................................................................................................4

2.1 Event Code...................................................................................................................................................................... 4

2.2 No Event Codes..............................................................................................................................................................5

3. Frequently Asked Questions...........................................................................................................................6

3.1 WiFi Issues....................................................................................................................................................................... 6

3.2 Firmware Update Issue.................................................................................................................................................7

3.3 Changes in SOC............................................................................................................................................................. 7

4. Tools and Methods.............................................................................................................................................8

4.1 CORE Link+..................................................................................................................................................................... 8

4.2 Stack Exclusion Method...............................................................................................................................................8

4.3 Voltage measurement/Undervoltage....................................................................................................................10

5. Replacement Guidance.................................................................................................................................. 12

5.1 BMS Replacement....................................................................................................................................................... 12

5.2 Stack Replacement...................................................................................................................................................12

Appendix 1 Event CODE...................................................................................................................................13

Appendix 2 Ports on the BMS....................................................................................................................... 19

Appendix 3 Display on BMS...........................................................................................................................20

Service Manual V1.2

1. Overview

Make sure to always use the latest version of this service document, available at:

https://wintersun.de/downloads/

This manual does not replace the original manual, which can be found on https://wintersun.de/downloads/.

This manual is subject to technical revisions, and no responsibility is accepted for the accuracy of this manual.

Before

contacting

our

services

team,

please

read

this

manual

try

solve

the

problem

yourself.

the

problem

remains,

please

contact

ASAP.

Attention:

High

Voltage!

Improper

handling

can

cause

danger

and

damage.

Important:

The

installation

and

all

other

kinds

works

measurements

combination

with

the

WTS

CORE

Series

are

only

allowed

professional

and

qualified

personnel.

1.1

Claim

and

Contact

If,

after

completing

the

inspection

with

following

the

steps

described

this

manual

under

the

guidance

our

services

team,

confirmed

that

there

could

part

failure

that

needs

resolved

replacement,

please

account

our

service

website

https://wintersun.de

and

fill

the

details

Tickets.

the

appearance

the

battery

damaged,

please

take

photos

the

battery

and

the

packaging

site

and

provide

them

our

services

team.

The

contact

information

for

our

services

team

follows:

TEL:

+49

711

25513677

EMAIL:

service@wintersun.de

Service Manual V1.2

1.2 General Steps

If you find any problem with the battery, follow these steps for an initial check.

The system runs properly if :

-Inverter displays battery SOC correctly

-System charges / discharges

Note: If you can not complete the commissioning, then turn off the battery before you leave the site and make

sure the display is off. If this is not possible, remove the BMS. Please refer to 1.1 to get in touch with the

services team. After that, the blind connector of the top stack needs to be covered with an insulating

object.

2. Error Analysis

Please read 2.1 if there are event codes shown on the display, and read 2.2 if they are not available.

2.1 Event Code

After the battery system switches on, if the LED indicator turns yellow and an event code appears in the "Status

Area", please refer to Appendix 1.

No.

Inspection items

Inspection steps

Type of stacks

Do not mix up WTS Power-Core 1.0 and WTS Energy-Core 1.0.

External connections

1）Please refer to 1.3.1 to check if the wrong port is plugged in

2）Check whether the cable is loose

3）Check the cable itself for any problems.

Restart

NOTE: It is important that the battery is switched on before the inverter!

Else, the BMS might not start and not show any response (no display, no

WiFi).

(mind the sequence)

1) Switch off the inverter

2) Turn off the battery:Turn off the air switch on the BMS

3) Wait at least 3 minutes.

4) Turn on the battery (switch up)

5) Turn on the inverter

Service Manual V1.2

2.2 No Event Codes

2.2.1 System cannot be turned on

1) BMS shows no response.

If you turn on the BMS switch, but WiFi is not detected and the display does not light up, please try to restart the

system in correct sequence (refer to Step 3 in 1.2).

If the problem remains, please refer to 4.2 to check the voltage. If the voltage is normal, you can try another BMS

if available.

If the voltage is abnormal, please refer to 4.2 to identify the faulty stack.

2) Trip immediately after pulling up the air switch on BMS.

No.

Inspection items

Inspection steps

Wiring

1) Switch off the inverter first and then pull down the BMS switch, disconnect all

external cables and restart the battery in correct sequence.

2) If it works, check if the inverter is short-circuited; If the problem remains,

proceed with the next step.

Voltage

Refer to 4.3 for voltage check:

If the voltage is abnormal, identify the faulty stack by referring to 4.2.

If the voltage is normal, try another BMS if available.

2.2.2 Automatic tripping after a period of operation

Restart the system in correct order:

1. If successful:

a. If event codes appear on the LCD, please refer to Appendix 1 for more details.

b. If not, please use the app to download the logs and send them to GBA service. Repair under the guidance of

service.

(Sporadic alarms can be difficult to detect because they only occur occasionally. Therefore, it is very important to

download and make all historical battery log files available to find the root cause.)

2. If failed: Refer to 2.21.

3. LCD shows no back-light after the air switch automatically drops:

After air switch drops and the LCD dims out, please wait 2 or 3 minutes before you pull up the air switch.

Service Manual V1.2

3. Frequently Asked Questions

3.1 WiFi Issues

Common WiFi failures include: no WiFi signal / unstable WiFi / unable to connect to WiFi

When these failures occur, follow the steps below:

Check status of the WiFi on the LCD screen

WiFi usually turns off automatically within 5 hours after the battery turns on. Find the WiFi settings in the

"Setting. Area" on the LCD (refer to Appendix 3) and see if the status is "ON". If not, please set it as "ON". If yes,

please proceed to the next step.

Disconnect LAN cable

Remove the LAN cable during your mobile device is connecting the WiFi. After that you can connect it again to

the Internet.

Restart

To restart the WiFi, change the status of WiFi from "ON" to "OFF", and then from "OFF" to "ON".

Try other mobile devices.

Sometimes the problem comes from the mobile device itself, try to see if other mobile devices can connect to

WiFi.

Replace BMS

If none of the steps above work, please replace the BMS.

Service Manual V1.2

3.2 Firmware Update Issue

1) Fix WiFi

If it is caused by unstable WiFi, please refer to 3.1.

2) Restart

Restart the system in correct sequence.

3) Try again with other mobile devices.

Sometimes the problem comes from the mobile device itself, try to see if other devices can update.

4) Replace BMS

If none of the above steps work, please try another BMS if available.

3.3 Changes in SOC

1. SOC jumps

The SOC of a battery cannot be measured. It is a estimated value. In general, the state of charge (SOC) of a battery

is estimated using the voltage, but other factors such as temperature, current flow and charging behavior also play

a role. The calculation of the state of charge is generally more precise if the battery regularly sees full cycles. It is

normal to have a SOC correction / calibration every now and then.

2. SOC at commissioning

New stacks have 30% SOC upon delivery. A new BMS might show a different SOC at the beginning (mostly 50% /

30% / 0%). However, this is only to be understood as a placeholder value, as a new BMS cannot measure the SOC

of stacks. As soon as the system starts to run (charge/discharge) the SOC detection is corrected gradually. The SOC

calibration is completed after the latest full cycle

Service Manual V1.2

4. Tools and Methods

4.1 CORE Link+

With the CORE Link+ you can:

1) read the battery information;

2) update firmware;

3) export / download battery logs.

The CORE Link+ is constantly being improved and updated. Make sure to use the latest program version.

For the service analysis, please download and provide the data / logs as described in the program instructions .

Note: You need a Windows computer that can be linked to the battery WiFi. Login as the Installer to the CORE

Link+.

4.2 Stack Exclusion Method

Configure the battery system as that the number of stacks is minimum in a tower, 2 for WTS Power-CORE 1.0,

and 3 for WTS Energy-CORE 1.0.

1) Check the system. If Okay, add one stack at a time and check again.

Service Manual V1.2

......

2) If not okay: The faulty stack is probably one of the stacks in the tower. Take one of the spare stacks and

exchange with each of the remaining stacks with the spare stack one at a time. Check the battery status after each

step. If battery status turns to “OK”, the faulty stack is the one that was exchanged.

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