BYD Premium LVL 15.4 Service Manuallines
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BYD Premium LVL 15.4 Service Manuallines

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BYD Battery-Box Premium LVL
Service Guideline and Checklist
Version 1.2
Valid for Premium LVL 15.4
LVL 15.4 (max. 64 per system)
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 on
www.bydbatterybox.com
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
/
www.eft-systems.de
/ www.alpspower.com.au. Subject to technical
BMU (1 x per system)

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Summary of Contents for BYD Premium LVL 15.4

  • Page 1 BYD Battery-Box Premium LVL Service Guideline and Checklist Version 1.2 Valid for Premium LVL 15.4 LVL 15.4 (max. 64 per system) BMU (1 x per system) 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

    CONTENT CONTENT 1. GENERAL STEPS 2. ERROR ANALYSIS 2.1 BMU does not turn on / BMU LED is off or flickering abnormally 2.2 Problem with the Firmware Update / App Configuration / Battery WiFi 2.3 Incorrect output voltage / No BMS Data / BMU EC102 2.4 Communication issue with Inverter / BMU EC106 2.5 SOC &...

  • 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 Premium LVL Minimum Configuration List” (V1.8 or above) available at: www.bydbatterybox.com Make sure the inverter is configured correctly.

  • Page 4: Error Analysis

    2. ERROR ANALYSIS Please refer to the general steps before proceeding, see chapter 1. 2.1 BMU does not turn on / BMU LED is off or flickering abnormally LEDs of BMU do not light up, although the battery is ON. Name Description Check correct cable port...

  • Page 5: Problem With The Firmware Update / App Configuration / Battery Wifi

    2.2 Problem with the Firmware Update / App Configuration / Battery WiFi The Battery Management consists of two components: the BMU and the BMS. The Firmware Update from the App will update the BMU, which will then update the BMS. The BMS update can take up to 30 Minutes. Name Description Correct App and...

  • Page 6: Incorrect Output Voltage / No Bms Data / Bmu Ec102

    2.3 Incorrect output voltage / No BMS Data / BMU EC102 Wrong PDU output voltage (e.g 16V) is normally an indicator for incorrect configuration or BMU<>BMS communication issue Name Description Battery correctly Please check if the App configuration was successful and the Firmware is the configured? most recent one.

  • Page 7: Communication Issue With Inverter / Bmu Ec106

    Note: if output voltage is incorrect or BMS (cell) data cannot be seen in BCP, then go though section 2.3 first Name Description Configuration Check if the configuration is correct. Refer to latest “BYD Battery-Box Premium LVL Minimum Configuration List” (V1.8 or above) available at: ww.bydbatterybox.com Make sure the inverter is configured and working correctly.

  • Page 8: Bmu/Bms Led Event Code (Ec)

    2.7 BMU/BMS LED event code (EC) A constant white LED refers to standby mode. White blinking means charge or discharge. When the battery is initiating, the LED will flash white and blue with an interval time of 0.5 seconds (normal during startup). When the LED flashes blue with an interval time of 1 second it indicates an event code.
  • Page 9 PreCharge Fault. EC 103 EC 108 - Check the DC cabling and make sure that the Minimum Configuration is met. - Restart the system according properly (see step 17, section 2.2) - If multiple LVL batteries connected in parallel: Exclusion Method (see section 2.10): Check if the system works when removing the suspected LVL unit If problem remains: Download all data with BCP (especially the historical and the cell data) (section...
  • Page 10 EC 104 EC 102 One of the BMS (LVL units) reports an event message. up to EC112 - If multiple LVL batteries connected in parallel: Exclusion Method (see section 2.10): Check if the system works when removing the suspected LVL unit (All other than 101, 103, 107, 113)

  • Page 11: Be Connect Plus (Bcp)

    2.8 Be Connect Plus (BCP) Be Connect Plus is a Windows-PC tool. With Be Connect Plus (BCP) you can: read the battery information, configure the battery system update BMU & BMS firmware Export / download battery logs (From BMU and all BMS) BCP is constantly being improved and updated.

  • Page 12: Voltage Measurement And Undervoltage

    2.9 Voltage measurement and undervoltage Attention: Make sure not to create a short circuit! You can see the max. and min. cell voltage in the BeConnect App or in PC Tool Be Connect plus (BCP) You can get the detailed module and cell voltage in the BCP Program (section 2.8) or measure it manually according to the below description: Measure the module voltage: Open the front door and measure the tower voltage between B+/B- (red circle).

  • Page 13: Unit Exclusion Method (Only When At Least 2 Lvls / Parallel Connection)

    Undervoltage A LVL in which one of the 16 cells has a voltage of <1.5 V is in undervoltage (check with BCP (section 2.8) / BC if possible). - LVL with >45 V should be fine and you can continue to check other points according to this service guideline. - If the LVL voltage is <45V but the single cell voltage is >1.5V, the battery needs to be charged quickly while avoiding any further discharge.

  • Page 14: Service Tasks

    3. SERVICE TASKS Please go through the general and error specific steps beforehand, see chapter 1 and 2. 3.1 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 the app or BCP. 3.2 BMS Replacement Refer to Manual “BMS Drawer Replacement Guide”...

  • Page 15: Service Checklist And Contact Information

    BYD Battery-Box Premium LVL Service Checklist - V1.2 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.

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