Felicity LUX-E-48100LG04 Error Codes: Causes & Fixes (12 codes)

This is the complete fault table for the Felicity LUX-E-48100LG04 Battery — all 12 codes from the official manual on one page. On this Felicity device, a fault code means the unit has entered protection and stopped normal operation; a warning leaves it running. The exact indication (LED pattern or display code) is listed per code below.

Last checked against the official manuals on July 10, 2026.

How to read the severity labels

  • Fault(12)— operation stops until cleared

Fault codes (12)operation stops until cleared

FAULT (RED ON, LED1=OFF, LED2=OFF, LED3=OFF, LED4=ON)Fault

BMS TEMPERATURE LOW.

Fault

CauseBMS internal temperature fell below the lower protection threshold.

Recommended fixWarm the installation environment (operating range Charge: 0°C–55°C, Discharge: -20°C–55°C). The fault will self-clear once temperature returns to range. if the fault persists, contact the local distributor.

Source:LUX-E-48100LG04-Lithium-Battery-User-Guide.pdf· page 12

FAULT (RED ON, LED1=OFF, LED2=OFF, LED3=ON, LED4=OFF)Fault

CELL VOLTAGE LOW.

Fault

CauseAn individual cell voltage fell below the lower cell protection threshold.

Recommended fixRecharge the battery promptly. The BMS will self-recover once cell voltage recovers. if the fault persists, contact the local distributor.

Source:LUX-E-48100LG04-Lithium-Battery-User-Guide.pdf· page 12

FAULT (RED ON, LED1=OFF, LED2=ON, LED3=OFF, LED4=OFF)Fault

BATTERY VOLTAGE LOW.

Fault

CauseTotal battery pack voltage fell below the BMS lower protection threshold (undervoltage protection).

Recommended fixRecharge the battery promptly (per section 10.1, the battery should be charged in time when undercharged or stored more than 3 months). The BMS will automatically return to normal once voltage recovers. if the fault persists, contact the local distributor.

Source:LUX-E-48100LG04-Lithium-Battery-User-Guide.pdf· page 12

FAULT (RED ON, LED1=OFF, LED2=ON, LED3=OFF, LED4=ON)Fault

CELL TEMPERATURE LOW.

Fault

CauseAn individual cell temperature fell below the lower protection threshold (charge: below 0°C; discharge: below -20°C).

Recommended fixWarm the environment until cells are within the operating range (Charge: 0°C–55°C, Discharge: -20°C–55°C). The fault will self-clear once temperature normalises. if the fault persists, contact the local distributor.

Source:LUX-E-48100LG04-Lithium-Battery-User-Guide.pdf· page 12

FAULT (RED ON, LED1=OFF, LED2=ON, LED3=ON, LED4=OFF)Fault

DISCHARGING CURRENT HIGH.

Fault

CauseDischarging current exceeded the BMS overcurrent protection threshold.

Recommended fixReduce load current; verify the load is within the recommended 50A and max-continuous 60A limits (peak 100A for 15s). The BMS will self-recover once current returns to normal. if the fault persists, contact the local distributor.

Source:LUX-E-48100LG04-Lithium-Battery-User-Guide.pdf· page 12

FAULT (RED ON, LED1=ON, LED2=OFF, LED3=OFF, LED4=OFF)Fault

BATTERY VOLTAGE HIGH.

Fault

CauseTotal battery pack voltage exceeded the BMS upper protection threshold (overvoltage protection).

Recommended fixStop charging and allow voltage to drop. The BMS will automatically return to normal once the trigger condition is removed. if the fault persists, contact the local distributor.

Source:LUX-E-48100LG04-Lithium-Battery-User-Guide.pdf· page 12

FAULT (RED ON, LED1=ON, LED2=OFF, LED3=OFF, LED4=ON)Fault

CELL TEMPERATURE HIGH.

Fault

CauseAn individual cell temperature exceeded the upper protection threshold.

Recommended fixStop charging/discharging and allow the cell to cool; check ambient temperature is within the operating range. The fault will self-clear once temperature normalises. if the fault persists, contact the local distributor.

Source:LUX-E-48100LG04-Lithium-Battery-User-Guide.pdf· page 12

FAULT (RED ON, LED1=ON, LED2=OFF, LED3=ON, LED4=OFF)Fault

CHARGING CURRENT HIGH.

Fault

CauseCharging current exceeded the BMS overcurrent protection threshold.

Recommended fixReduce charging current; verify charger/inverter is configured within the recommended 50A and max-continuous 60A limits (peak 100A for 15s). The BMS will self-recover once current returns to normal. if the fault persists, contact the local distributor.

Source:LUX-E-48100LG04-Lithium-Battery-User-Guide.pdf· page 12

FAULT (RED ON, LED1=ON, LED2=ON, LED3=OFF, LED4=OFF)Fault

CELL VOLTAGE HIGH.

Fault

CauseAn individual cell voltage exceeded the upper cell protection threshold.

Recommended fixStop charging and allow the affected cell voltage to drop. The BMS will self-recover once the trigger condition is removed. if the fault persists, contact the local distributor.

Source:LUX-E-48100LG04-Lithium-Battery-User-Guide.pdf· page 12

FAULT (RED ON, LED1=ON, LED2=ON, LED3=OFF, LED4=ON)Fault

CURRENT SENSOR ABNORMAL.

Fault

CauseBMS detected an abnormal reading from the current-sampling circuit / current sensor.

Recommended fixRestart the battery (turn breaker OFF then ON, press POWER for 1 second). if the fault persists, contact the local distributor (per section 10.2: when the LED does not light up or flash on power-up, consider contacting the local distributor).

Source:LUX-E-48100LG04-Lithium-Battery-User-Guide.pdf· page 12

FAULT (RED ON, LED1=ON, LED2=ON, LED3=ON, LED4=OFF)Fault

BMS TEMPERATURE HIGH.

Fault

CauseBMS internal (MOSFET / control board) temperature exceeded the upper protection threshold.

Recommended fixCheck the ambient temperature and cooling space around the unit (per section 8.3 ambient must be 0°C–45°C). Allow the BMS to cool. The fault will self-clear once temperature returns to range. if the fault persists, contact the local distributor.

Source:LUX-E-48100LG04-Lithium-Battery-User-Guide.pdf· page 12

LOW POWER (GREEN FLASH, RED OFF, all LEDs OFF)Fault

Low Power / Low SOC shutdown.

Fault

CauseBattery state-of-charge is critically low and the system has entered low-power state with output disabled.

Recommended fixRecharge the battery. Per section 10.1, charge the battery in time if it is often under-charged or has been stored for more than 3 months. The system will return to normal once charging restores SOC.

Source:LUX-E-48100LG04-Lithium-Battery-User-Guide.pdf· page 12

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Common questions about LUX-E-48100LG04 error codes

What is the difference between a fault and a warning on the LUX-E-48100LG04?
A fault puts the unit into protection and stops normal operation — this page lists 12 of them for the LUX-E-48100LG04. The LUX-E-48100LG04 manual defines no separate warning table — every listed code stops operation. Resolve the cause of a fault before restarting; warnings can usually be cleared while the unit runs.
Does this page apply to other Felicity models?
No — this table was transcribed specifically from the LUX-E-48100LG04 manual. Other Felicity devices have their own pages; start from the error-code hub to find the one matching the model number on your unit's label.
Where do these codes come from?
Every entry was transcribed from LUX-E-48100LG04-Lithium-Battery-User-Guide.pdf — Felicity's official documentation. Each row cites its source manual (and page where printed), so you can verify the wording before acting on it.

Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.