BYD Premium LVS 4.0 User Manual

BYD Battery-Box Premium LVS
Service Guideline and Checklist
Version 1.1
Valid for Premium LVS 4.0 / 8.0 / 12.0 / 16.0 / 20.0 / 24.0
LVS 16.0 (4 Modules + PDU. Max. 64 Modules in 16 Towers 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.
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 / www.eft-systems.de / 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.

BYD Premium LVS 4.0 Specifications

General

Brand	BYD
Model	Premium LVS 4.0
Category	Inverter
Language	English

Summary

General Steps for System Setup

Configuration Verification

Verify system configuration against the latest LVS Minimum Configuration List.

Correct External Cabling

Ensure proper communication and grounding cables are correctly connected.

Latest Firmware Update

Always update to the newest firmware version for optimal performance and features.

App Configuration and Commissioning

Mandatory commissioning via Be Connect App or PC tool for system setup.

Proper Restart Procedure

Follow the correct shutdown and startup sequence for the battery system.

Check Correct Operation

Verify system functionality by checking inverter SOC display and charge/discharge.

Error Analysis and Troubleshooting

BMU Power and LED Issues

Diagnose and resolve issues where the BMU does not power on or has abnormal LED behavior.

Module Reaction and LED Status

Troubleshoot modules that do not show any reaction or have no LEDs illuminated.

Firmware, App, and WiFi Configuration Problems

Address issues related to firmware updates, app configuration, and unstable WiFi connections.

Incorrect Voltage, BMS Data, or BMU EC102 Errors

Analyze and fix incorrect output voltage, missing BMS data, or BMU EC102 error codes.

Inverter Communication Issues (BMU EC106)

Resolve communication problems between the BMU and the inverter, often indicated by EC106.

SOC and Charging Logic Anomalies

Investigate unusual behavior in State of Charge (SOC) calculation or charging logic.

Unexpected System Shutdowns

Diagnose the causes of sudden and unexpected system shutdowns after successful commissioning.

BMU/BMS LED Event Codes (EC)

Understand and interpret BMU and BMS LED event codes for error identification.

Be Connect Plus (BCP) Tool Usage

Learn how to use the Be Connect Plus PC tool for diagnostics, configuration, and firmware updates.

Voltage Measurement and Undervoltage Issues

Perform voltage measurements and diagnose undervoltage conditions in battery modules.

Module Exclusion Method for Fault Identification

Utilize the module exclusion method to identify faulty modules within the system.

Service Tasks and Replacements

BMU Replacement Procedure

Steps and considerations for replacing the Battery Management Unit (BMU).

PDU Replacement Procedure

Instructions for replacing the Power Distribution Unit (PDU) in the system.

LVS Module Replacement Procedure

Guidelines for replacing individual LVS battery modules.