Fault

C11

Abnormal current sampling.

17 Devices that report this code

What does the C11 error code mean?

C11 on a Felicity unit indicates: Abnormal current sampling.. It is a fault-severity event that can appear on 17 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

C11 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.

FLA12100Battery↗ view on device
C11Abnormal current sampling.Fault
Description

Abnormal current sampling fault. LED pattern: LED1 ON, LED2 ON, LED3 OFF, LED4 ON.

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:Felicitysolar FLA12100 12.5Kwh Battery Energy Storage System User Manual.pdf · page 1
FLA48200Battery↗ view on device
C11Abnormal current sampling.Warning— medium
Description

Current sampling/measurement circuit reported an abnormal reading.

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf · page 13
FLA48250Battery↗ view on device
C11Abnormal current sampling.Critical
Description

BMS detected an abnormal reading from the current sampling circuit.

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:6peluqppy_66a93554057c8.pdf · page 13
FLA48250-EUBattery↗ view on device
C11C11Fault
Description

Abnormal current sampling.

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:FLA48250-EU_Manual.pdf · page 8
FLA48500Battery↗ view on device
C11Abnormal current sampling.Fault
Description

Internal current measurement / sampling circuit abnormal.

Cause

Hardware/sensor abnormality in current sampling path.

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdf
FLS48100SG2Battery↗ view on device
C11Stromsensor abnormal / Anomalie der Strommessung.Fault
Description

Abnormal current sampling. The BMS current measurement returned an out-of-range or invalid reading.

Cause

Internal current sensor or sampling circuit reported abnormal values (Stromsensor liefert anormale Werte).

Recommended fix

Restart the unit. if the error persists, return to repair centre.

Source:Benutzerhandbuch - Felicity FLS48100SG2.pdf
HE-GF-FLA-48500Battery↗ view on device
C11Abnormal current sampling.Fault
Description

Internal current measurement / sampling circuit abnormal.

Cause

Hardware/sensor abnormality in current sampling path.

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:HE-GF-FLA-48500 Manual_20250327_EN.pdf
LPBF48100-MBattery↗ view on device
C11Abnormal current sampling.Critical
Description

BMS current-sensor / sampling diagnostic failure displayed on the LCD BMS fault code / flag screen (section 4.4); the pack cannot reliably measure charge / discharge current.

Cause

Internal current-sensor or sampling-circuit fault on the BMS board.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:358-010291-07.pdf · page 9
LPBF48200-HBattery↗ view on device
C11Abnormal current sampling.Fault
Description

BMS internal current measurement circuit fault.

Cause

Current sensor / sampling circuit malfunction (internal hardware fault).

Recommended fix

Restart the unit; if the error persists, contact the repair center.

Source:Manual-LPBF48200-H.pdf · page 10
LPBF48350Battery↗ view on device
C11C11Fault
Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdf
LUX-E-48100LG03Battery↗ view on device
C11Abnormal current sampling.Fault
Cause

BMS detected an abnormal reading from the current-sampling circuit.

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:LUX-E-48100LG03-Lithium-Battery-User-Guide.pdf · page 13
LUX-E-48200LG03Battery↗ view on device
C11C11Fault
Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:LUX-E-48200LG03-Lithium-Battery-User-Guide.pdf · page 13
LUX-E-48230LG03Battery↗ view on device
C11C11Fault
Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:LUX-E-48230.250LG03-Lithium-Battery-User-Guide.pdf
LUX-X-48050LG01Battery↗ view on device
C11C11Fault
Description

Abnormal current sampling.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:LUX-X-48050LG01-low-voltage-battery-user-guide.pdf · page 17
LUX-X-48100LG01Battery↗ view on device
C11Abnormal current sampling.Warning
Description

Internal current sensor / sampling circuit returned an abnormal reading.

Recommended fix

Restart the unit; if the error persists, contact the repair center.

Source:LUX-X-48100LG01-Litium-Battery-User-Guide.pdf · page 17
LUX-X-48100LG01-USBattery↗ view on device
C11Abnormal current sampling.Warning
Description

Internal current sensor / sampling circuit returned an abnormal reading.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:358-S010024-03LUX-X-48100LG01-User-manual_compressed.pdf · page 23
LUX-Y-48280LG01Battery↗ view on device
C11Abnormal current sampling.Fault
Cause

BMS detected an abnormal reading from the current-sampling circuit.

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:LUX-Y-4828048300LG01-Lithium-Battery-User-Guide.pdf · page 8

Frequently asked about C11

What is the C11 error on Felicity?
C11 on a Felicity unit means: Abnormal current sampling.. It can appear on 17 different devices in the Felicity catalog. The cause and recommended fix are listed for each device on this page.
Can I clear the C11 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 C11 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.