Critical

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

Current Sensor Abnormal.

2 Devices that report this code

What does the FAULT: LED1=ON, LED2=ON, LED3=OFF, LED4=ON (Green OFF, Red ON) error code mean?

FAULT: LED1=ON, LED2=ON, LED3=OFF, LED4=ON (Green OFF, Red ON) on a Felicity unit indicates: Current Sensor Abnormal.. It is a critical-severity event that can appear on 2 different devices in the Felicity catalog. The same code may have slightly different recommended fixes depending on the device — the per-device sections below show the exact wording from each device's official manual.

This is a critical-severity code

Critical codes trip the unit offline immediately. They typically indicate hardware failure (short-circuit, IGBT, BMS) or an unsafe operating condition. Do not bypass the fault — note the code and contact authorized service.

What triggers this code

FAULT: LED1=ON, LED2=ON, LED3=OFF, LED4=ON (Green OFF, Red ON) is triggered when the unit's protection or monitoring logic detects the specific condition described above. The exact trigger depends on the device — see the per-device sections for the official manual entry for each.

LPBF24200-MBattery↗ view on device
FAULT: LED1=ON, LED2=ON, LED3=OFF, LED4=ON (Green OFF, Red ON)Current Sensor Abnormal.Critical
Description

BMS current-sensor diagnostic failure; the pack cannot reliably measure charge/discharge current.

Cause

Internal current sensor fault or wiring problem on the BMS board (text in manual: 'CURRENT SENSOR ABNOMAL' [sic]).

Recommended fix

Power-cycle the pack. if the fault persists do not continue to use the unit; contact a qualified service technician — section 1.3 warns that only qualified service persons may service the device.

Source:Felicitysolar LPBF24200-M LiFePO4 Battery System for Households User Guide.pdf · page 9
LPBF48250Battery↗ view on device
FAULT: LED1=ON, LED2=ON, LED3=OFF, LED4=ON (Green OFF, Red ON)Current Sensor Abnormal.Critical
Description

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).

Cause

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

Recommended fix

Power-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

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

What is the FAULT: LED1=ON, LED2=ON, LED3=OFF, LED4=ON (Green OFF, Red ON) error on Felicity?
FAULT: LED1=ON, LED2=ON, LED3=OFF, LED4=ON (Green OFF, Red ON) on a Felicity unit means: Current Sensor Abnormal.. It can appear on 2 different devices in the Felicity catalog. The cause and recommended fix are listed for each device on this page.
Can I clear the FAULT: LED1=ON, LED2=ON, LED3=OFF, LED4=ON (Green OFF, Red ON) code myself?
It depends on the severity. Warning-level codes can usually be cleared by following the recommended fix. Fault and critical codes often require checking the source condition first; if the code returns immediately after restart, escalate to authorized service.
Is the FAULT: LED1=ON, LED2=ON, LED3=OFF, LED4=ON (Green OFF, Red ON) fix the same on every device?
The cause is consistent — it's the same protection logic. The exact fix wording can differ per device because each official manual addresses model-specific context (input ranges, parallel-config notes, firmware revisions). Use the per-device section that matches your unit.
Where does this information come from?
Every entry is sourced directly from the official Felicity user manual for the affected device. The "Source" line at the bottom of each device's section shows the manual filename and page number.

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