Output loss
Fault — the battery enters fault protection and stops normal operation until the fault is cleared — how it is shown (LED pattern or display code) depends on the model.
The exact meaning depends on your model:
Output loss — Output loss fault. LED pattern: LED1 OFF, LED2 ON, LED3 ON, LED4 ON.
Cause: The battery's output path is interrupted: the circuit breaker is open or the fuse has blown.
Source: fla12100pg2-user-guide-english.pdf, p.1
Output loss — Battery output is lost - no power being delivered to the load.
Cause: Circuit breaker open or fuse blown.
Source: Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf, p.13
Output loss — BMS detected loss of output from the battery pack (no power on the output side).
Cause: Circuit breaker may be open, or the fuse may be blown.
Source: 6peluqppy_66a93554057c8.pdf, p.13
C14 — Output loss.
Cause: The battery's output path is interrupted: the circuit breaker is open or the fuse has blown.
Source: FLA48250-EU_Manual.pdf, p.8
Also applies to:HE-GF-FLA-48500
Output loss — Output loss / no output detected.
Cause: Breaker open, blown fuse, or output path interrupted.
Source: felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdf · HE-GF-FLA-48500 Manual_20250327_EN.pdf
Ausgangsverlust / Ausgang fehlt — Output loss. No output detected at the battery terminals.
Cause: Circuit breaker open, blown fuse, or internal output failure (Sicherung durchgebrannt, Trennschalter offen oder interner Ausgangsfehler).
Source: fls48100sg2-datasheet.pdf
Output loss — Output-loss fault displayed on the LCD BMS fault code / flag screen (section 4.4); the BMS detects no output current path / output cannot be enabled.
Cause: Open circuit breaker, blown internal fuse, or other open in the output path. Section 2.3 lists Built-in smart BMS, Fuse as the protection elements.
Source: 358-010291-07.pdf, p.9
Also applies to:LUX-Y-48280LG01LUX-Y-48300LG01
Output loss
Cause: No output from the battery pack. Possible causes: circuit breaker open, or fuse blown.
Source: LUX-E-48100LG03-Lithium-Battery-User-Guide.pdf, p.13 · LUX-Y-4828048300LG01-Lithium-Battery-User-Guide.pdf, p.8
C14
Cause: Output loss — no output from the battery pack; the circuit breaker may be open or the fuse may be blown.
Source: LUX-E-48200LG03-Lithium-Battery-User-Guide.pdf, p.13
Also applies to:LUX-E-48250LG03
C14
Cause: Circuit breaker may be open or fuse may be blown.
Source: LUX-E-48230.250LG03-Lithium-Battery-User-Guide.pdf
Also applies to:LUX-X-48100LCG01LUX-X-48100LMG01
Output loss — Battery pack has lost its output (no DC output detected at the terminals).
Cause: Open circuit breaker, blown fuse or other output-path interruption.
Source: lux-x-48100lg01-datasheet-en.pdf, p.17
Also applies to:LUX-X-48100LCG01-USLUX-X-48100LMG01-USLUX-X-48100LG01-USM2LUX-X-48100LG01-USM3LUX-X-48100LG01-USM4LUX-X-48100LG01-USM5LUX-X-48100LG01-USM6LUX-X-48100LG01-USM7+1
Output loss — Battery pack has lost its output (no DC output detected at the terminals).
Cause: Open circuit breaker, blown fuse or other output-path interruption.
Source: 358-S010024-03LUX-X-48100LG01-User-manual_compressed.pdf, p.23
It depends on the model — 14 devices use code C14. On the FLA12100 it means: Output loss. The card for each model on this page gives its exact meaning and fix.
C14 is a fault code: the battery enters protection and stops normal operation until it is cleared.
1. Check whether the circuit breaker is closed. The exact steps for each affected model are listed on this page.
Prefer the full written guide? Read the complete Felicity inverter error-code guide
Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.