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BYD Battery-Box LV Flex Lite Service Manuallines
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BYD Battery-Box LV Flex Lite Service Manuallines

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BYD Battery-Box LV Flex Lite
Service Guideline and Checklist
Version 1.0
Important: The installation and all other kinds of works or measurements in combination with the
Battery-Box Premium are only allowed by professional and qualified electricians.
This checklist is a shortened assistance for the Battery-Box and does not replace the original manual,
which
can
be
found
www.alpspower.com.au. Subject to technical modifications; no responsibility is accepted for the
accuracy of this information. Attention: Improper handling can cause danger and damage
Make sure to always use the latest version of this
service document, available at:
www.bydbatterybox.com
on
www.bydbatterybox.com
1
/
www.eft-systems.de
/

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Summary of Contents for BYD Battery-Box LV Flex Lite

  • Page 1 BYD Battery-Box LV Flex Lite Service Guideline and Checklist Version 1.0 Make sure to always use the latest version of this service document, available at: www.bydbatterybox.com Important: The installation and all other kinds of works or measurements in combination with the Battery-Box Premium are only allowed by professional and qualified electricians.

  • Page 2: Table Of Contents

    Contents 1. GENERAL STEPS ........................3 2. ERROR ANALYSIS........................4 3. MEASUREMENT........................16 4. SERVICE TASKS........................18 4.1 BMU Replacement ........................18 4.2 LV Flex Lite Module Replacement....................18...

  • Page 3: General Steps

    Please proceed first with the installation steps by: Name Description Configuration Check if the configuration is correct. Refer to latest “BYD BATTERY-BOX LV Flex Lite MINIMUM CONFIGURATION LIST ”(V1.0 or above) available at: www.bydbatterybox.com Make sure the inverter is configured correctly Correct external 1.

  • Page 4: Error Analysis

    BMU for 5 sec). Make sure all LEDs of the battery are completely off. Figure 1 power off BMU Then follow the correct switch on procedure (see step 1.6) Switch Correct switch on procedure is important for a correct operation procedure 1.
  • Page 5 2.1.3 Voltage Battery voltage should be around 50V, see Section 3.1 for voltage measurement measurement. If yes: try another BMU (if available). If no: check another cable or Try another LV FLEX Lite if multiple batteries are installed in the system.
  • Page 6 2.2.5 Module Module Exclusion Method (see section 3.2): Check if the system Exclusion works when bypassing the suspected module. Remove it if Method bypassing works. 2.3 Problem with the Firmware Update / App Configuration The Battery Management consists of two components: the BMU and the BMS. The Firmware Update from BC APP and BCP will update the BMU, which will then update the BMS.
  • Page 7 2.3.3 App reports: Battery-Box is busy (e.g. the battery could be updating the “The battery firmware). Please wait 10 minutes and try again. system may be busy, please try again later” 2.3.4 Proper restart Note: Whenever the configuration via BC APP / BCP is changed, a restart of the battery is necessary to make sure that all changes come into effect.
  • Page 8 2.4 Incorrect output voltage / No BMS Data Name Description 2.4.1 Please check if BC APP configuration was successful and the Configuration Firmware is the most recent one. If there are problems, please and Firmware refer to Section 2.3 Note: It is important to select the correct module quantity. The quantity you need to select refers to the overall quantity of LV Flex Lite modules and not to the quantity of towers.
  • Page 9 Name Description 2.5.1 Configuration Check if the inverter is correctly selected when configuration. Refer to latest “BYD BATTERY-BOX LV FLEX LITE MINIMUM CONFIGURATION LIST” (V1.0 or above) available at: www.bydbatterybox.com Make sure the inverter is configured correctly 2.5.2 Inverter settings Make sure to configure the battery correctly on the inverter interface.
  • Page 10 2.5.5 Further If problem remains: checking - Upload logs with BC APP (section 2.10) or download all data with BCP (section 2.9). - Check the inverter - Try by replacing the BMU, if available 2.6 SOC & charging logic Name Description 2.6.1 SOC jumps...
  • Page 11 History Data historic battery log files in order to identify the root cause. See section 2.9 for details. You can also upload logs with BC APP. See section 2.10. 2.7.3 Inverter Warning Unexpected Shutdown can be caused by overall system settings. &...
  • Page 12 EC 101 Initialization Failure. - Make sure BC APP-configuration has been completed correctly (especially module quantity!) - Restart the system according to the manual. (Note: to properly shut down you need to press the button on the BMU for 5 seconds. Make sure to start the battery before starting the inverter!) If the problem remains: - Download all data with BCP (especially the historical data)
  • Page 13 EC 103 EC 108 PreCharge Fault. - Check DC cabling and make sure that the Minimum Configuration is met. - Restart system properly (see Step 2.4.2, section 2.4; If there is a fuse between battery and inverter, make sure to close the fuse first) - Disconnect the battery system from the inverter and restart the battery system alone (battery isolated), to evaluate if the...
  • Page 14 EC 104 EC 102 One of the BMS (modules) reports an event message. up to - Check the voltage of the batteries according to section 3.1 EC113 If problem remains: (All other - Download all data with BCP (especially the historical and the cell data) (section 2.9), or upload logs with BC APP (section than 101) 2.10).
  • Page 15 When you reach the Status interface, press the three dots on the top left corner, and you will see the menu. Choose Upload Logs, and following the instructions, then you can upload the logs to the BYD server. Figure 4 BC APP screenshot...

  • Page 16: Measurement

    3. MEASUREMENT 3.1 Voltage measurement on pin 7&8 Measure the voltage of pin 7 & 8 while the other side of the cable is connected to the IN port of the Battery and while the Battery is powered on. Voltage should be around 50V. Note: Pin 7 and pin 8 are very close.
  • Page 17 Compatible Inverter List). Otherwise, make sure to avoid further over discharge. (Turn off the system completely) - If one, or all modules are in undervoltage: Contact BYD local service and make sure to avoid any further discharge of the battery (Turn off the system completely)

  • Page 18: Service Tasks

    4. SERVICE TASKS Please go through the general steps beforehand, see chapter 1. 4.1 BMU Replacement Have you detected a faulty BMU? After replacing the BMU, please do not forget to re-do the configuration and firmware-update with BC APP or BCP. 4.2 LV Flex Lite Module Replacement After replacing a Module, please do not forget to re-do the configuration and firmware-update in BC APP.
  • Page 19 BYD Battery-Box LV Flex Lite Service Checklist - V1.0 EN Important: The installation and all other kinds of works or measurements in combination with the BYD Battery-Box are only allowed by professional and qualified electricians. Improper handling can cause danger and damage. This document does not replace the official BYD manuals and documents.