Felicity LPBF48250 Error Codes: Causes & Fixes (11 codes)

This is the complete fault table for the Felicity LPBF48250 Battery family — 11 codes shared by 2 model numbers, transcribed from the official manual. 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.

Also coversLPBF48300

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

How to read the severity labels

  • Critical(1)— unit trips offline — do not restart before checking
  • Fault(10)— operation stops until cleared

Critical codes (1)unit trips offline — do not restart before checking

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

Current Sensor Abnormal.

Critical

BMS current-sensor diagnostic failure; the pack cannot reliably measure charge / discharge current. Listed in the FAULT row of the LED table on page 7 as 'CURRENT SENSOR ABNOMAL' (sic in source).

CauseInternal current-sensor fault or wiring problem on the BMS board.

Recommended fixPower-cycle the pack (press and hold On/Off for 3 s to shut down per section 4.1, then re-enable). if the fault persists, do not continue to use the unit — section 1.3 items 3 and 12 require that only qualified service persons service the device. Contact your supplier per the warranty / damaged-battery guidance in section 5.

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

Fault codes (10)operation stops until cleared

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

BMS Temperature Low.

Fault

BMS / electronics under-temperature protection has tripped. Listed in the FAULT row of the LED table on page 7 as 'BMS TEMPERATURE LOW'.

CauseAmbient temperature below the BMS operating range. Section 1.3 item 14 forbids installation below 0 degC.

Recommended fixMove the battery to a warmer environment; do not install or operate below 0 degC. Allow the BMS to warm into the 0-45 degC operating range (section 3.2) before resuming use.

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

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

Cell Voltage Low.

Fault

Individual-cell under-voltage protection has tripped; one or more cells have fallen below the lower cell-voltage limit. Listed in the FAULT row of the LED table on page 7 as 'CELL VOLTAGE LOW'.

CauseDeep discharge or a weak / aged cell pulling below the under-voltage threshold.

Recommended fixStop the load and recharge as soon as possible. if a single cell repeatedly trips the protection, return the pack to your supplier for service (section 1.3 warns only qualified service persons may service the device).

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

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

Battery Voltage Low.

Fault

Pack-level under-voltage protection has tripped; output is disabled. Listed in the FAULT row of the LED table on page 7 as 'BATTERY VOLTAGE LOW'.

CausePack voltage fell below the BMS under-voltage threshold during discharge — typically at or near the 48 V cut-off voltage (section 2.4).

Recommended fixStop the load immediately and recharge from mains or PV as soon as possible. Section 1.4 warns repeatedly that an over-discharged pack may fail to be re-activated by the AC or PV activation cable, so do not attempt repeated activation cycles on a depleted pack.

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

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

Cell Temperature Low.

Fault

Cell-pack under-temperature protection has tripped. Listed in the FAULT row of the LED table on page 7 as 'CELL TEMPERATURE LOW'.

CauseCell temperature below the allowed range — charging is permitted only between 0 and +55 degC, discharging between -20 and +65 degC (section 2.3 spec).

Recommended fixWarm the battery to within the operating range before resuming use. Do not install or operate in an environment below 0 degC (section 1.3 item 14).

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

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

Discharging Current High.

Fault

Discharge over-current protection has tripped; output is disabled. Listed in the FAULT row of the LED table on page 7 as 'DISCHARGING CURRENT HIGH'.

CauseLoad drew more current than the recommended discharge limit (recommended <=120 A, MAX 200 A for 15 s per section 2.3) or a short circuit on the DC output. Section 1.3 item 11 warns NEVER to cause AC output / DC input short circuits.

Recommended fixRemove or reduce the load, check the DC output wiring for short circuits, and restart the pack. For loads above 6 kVA install at least 2 packs in parallel (section 1.3 item 9). MAX. Output Power is 10 000 W; recommended output power is 6 000 W (section 2.3).

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

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

Battery Voltage High.

Fault

Pack-level over-voltage protection has tripped; output is disabled. Listed in the FAULT row of the LED table on page 7 as 'BATTERY VOLTAGE HIGH'.

CausePack voltage exceeded the BMS over-voltage threshold during charging — e.g. charger output above the recommended Max. Charging Voltage of 57.6 V (section 2.4).

Recommended fixStop charging, verify the charger / inverter Max. Charging Voltage and Floating Charging Voltage are set to 57.6 V per section 2.4, and allow the pack voltage to fall back into the 48-57.6 V range before re-enabling output.

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

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

Cell Temperature High.

Fault

Cell-pack over-temperature protection has tripped. Listed in the FAULT row of the LED table on page 7 as 'CELL TEMPERATURE HIGH'.

CauseCells heated above the safe operating temperature. Per the section 2.3 spec the working temperature range is Discharge -20 to +65 degC and Charge 0 to +55 degC; this fault trips when cells exceed those limits.

Recommended fixStop charging / discharging, let the pack cool, and improve ventilation. if the fault persists at normal ambient temperature, contact the supplier for service (section 1.3 items 3 and 12 — only qualified service persons may open the unit).

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

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

Charging Current High.

Fault

Charge over-current protection has tripped. Listed in the FAULT row of the LED table on page 7 as 'CHARGING CURRENT HIGH'.

CauseCharge current exceeded the recommended limit. Per section 2.3 the recommended charge & discharge current is <=120 A and the absolute MAX is 200 A for 15 s; per section 2.4 Max. Charging Current is 120 A * N (N = number of packs in parallel). The protection trips when these limits are exceeded.

Recommended fixReduce the charge current at the charger / inverter to within 120 A per pack (section 2.4). For inverters larger than 6 kVA, install at least 2 sets of LPBF48V in parallel connection (section 1.3 item 9 and section 3.2).

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

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

Cell Voltage High.

Fault

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'.

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

Recommended fixStop 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

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

BMS Temperature High.

Fault

BMS / electronics over-temperature protection has tripped. Listed in the FAULT row of the LED table on page 7 as 'BMS TEMPERATURE HIGH'.

CauseInsufficient ventilation around the unit, ambient temperature too high, or sustained high charge / discharge current heating the BMS board. Per section 1.3 item 14 the unit must not be installed above 55 degC ambient or above 80% humidity; per section 3.2 the recommended ambient range is 0-45 degC.

Recommended fixStop charging / discharging and let the unit cool. Improve ventilation and ensure clearances around the unit per the section 3.2 mounting diagram, and verify ambient is within 0-45 degC.

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

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Common questions about LPBF48250 error codes

What is the difference between a fault and a warning on the LPBF48250?
A fault puts the unit into protection and stops normal operation — this page lists 11 of them for the LPBF48250. The LPBF48250 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.
Which model numbers does this page cover?
The LPBF48250 shares its firmware and fault table with 1 other model number: LPBF48300. If your unit is any of these, every code on this page applies to it.
Where do these codes come from?
Every entry was transcribed from Battery Manual LPBF48250 (EN).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.