Critical

F10

Abnormal LLC.

5 Devices that report this code

What does the F10 error code mean?

F10 on a Felicity unit indicates: Abnormal LLC.. It is a critical-severity event that can appear on 5 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

F10 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.

Apollo-5KLP1G01-MXEnergy storage system↗ view on device
F10Abnormal LLC.Critical
Description

Abnormal LLC converter operation.

Cause

Abnormal LLC.

Recommended fix

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

Source:Apollo-5KLP1G01-All-in-one-ESS-User-Guide.pdf · page 42
IVEM 6048Inverter↗ view on device
F10Overload time out.Fault
Description

Fault: Overload time out.

Cause

Sustained overload condition.

Recommended fix

Reduce the connected load by switching off some equipment.

Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf · page 37
IVEM8048-IIInverter↗ view on device
F10Overload time out.Fault
Description

Fault: Overload time out.

Cause

Connected load has exceeded the inverter's overload capacity for too long.

Recommended fix

Reduce the connected load by switching off some equipment.

Source:IVEM8K-12K-II_compressed.pdf · page 43
IVEM8048-LVInverter↗ view on device
F10Overload time out.Fault
Description

Overload time out.

Cause

Connected load exceeds inverter capacity for an extended time.

Recommended fix

Reduce the connected load by switching off some equipment.

Source:FelicitySolar IVEM8048-LV Single Phase Hybrid Inverter User Guide.pdf · page 38
T-REX-50KHP3G01Inverter↗ view on device
F10PV2 reverse connection fault.Fault
Description

Pv2 string positive and negative connection, check the string wiring.

Source:T-REX-50KHP3G01-user-manual-.pdf · page 45

Frequently asked about F10

What is the F10 error on Felicity?
F10 on a Felicity unit means: Abnormal LLC.. It can appear on 5 different devices in the Felicity catalog. The cause and recommended fix are listed for each device on this page.
Can I clear the F10 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 F10 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.