Fault

FAULT: LED1=ON, LED2=ON, LED3=OFF, LED4=OFF (Green OFF, Red ON)

Cell Voltage High.

2 Devices that report this code
FAULT: LED1=ON, LED2=ON, LED3=OFF, LED4=OFF (Green OFF, Red ON)Cell Voltage High.Fault
Description

One or more individual cells have exceeded the upper cell-voltage protection limit.

Cause

Cell imbalance during charging, or a charger setting that allows individual cells to drift above their safe ceiling.

Recommended fix

Stop charging, allow the BMS to balance, and review charger settings. if the condition persists the pack may need service.

Source:Felicitysolar LPBF24200-M LiFePO4 Battery System for Households User Guide.pdf · page 9
FAULT: LED1=ON, LED2=ON, LED3=OFF, LED4=OFF (Green OFF, Red ON)Cell Voltage High.Fault
Description

Individual-cell over-voltage protection has tripped; one or more cells have exceeded the upper cell-voltage limit. Listed in the FAULT row of the LED table on page 7 as 'CELL VOLTAGE HIGH'.

Cause

Cell imbalance during charging, or a charger setting that allows individual cells to drift above their safe ceiling.

Recommended fix

Stop charging, allow the BMS to balance the cells, and review charger / inverter charge-voltage settings against section 2.4 (Max. Charging Voltage 57.6 V). if the condition persists the pack may need service — only qualified personnel may open the unit (section 1.3, items 3 and 12).

Source:Battery Manual LPBF48250 (EN).pdf · page 7

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