Fault

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

Cell Voltage Low.

2 Devices that report this code

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

FAULT: LED1=OFF, LED2=OFF, LED3=ON, LED4=OFF (Green OFF, Red ON) on a Felicity unit indicates: Cell Voltage Low.. It is a fault-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 fault-severity code

Fault codes stop normal operation but the unit may attempt to recover. Common causes are out-of-range conditions (voltage, current, temperature) that require checking inputs and outputs before restart.

What triggers this code

FAULT: LED1=OFF, LED2=OFF, LED3=ON, LED4=OFF (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=OFF, LED2=OFF, LED3=ON, LED4=OFF (Green OFF, Red ON)Cell Voltage Low.Fault
Description

One or more individual cells have fallen below the lower cell-voltage protection limit.

Cause

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

Recommended fix

Stop the load and recharge as soon as possible. if a single cell repeatedly trips the protection, contact the supplier for service.

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

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'.

Cause

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

Recommended fix

Stop 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

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

What is the FAULT: LED1=OFF, LED2=OFF, LED3=ON, LED4=OFF (Green OFF, Red ON) error on Felicity?
FAULT: LED1=OFF, LED2=OFF, LED3=ON, LED4=OFF (Green OFF, Red ON) on a Felicity unit means: Cell Voltage Low.. 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=OFF, LED2=OFF, LED3=ON, LED4=OFF (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=OFF, LED2=OFF, LED3=ON, LED4=OFF (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.