Fan 1 locked
Also displayed as F08 on some models.
Fault — the inverter cuts its output and the red LED stays solid until the fault is cleared.
Severity differs by model — check your model below.
The exact meaning depends on your model:
Also applies to:IVCM2024 PROIVCM3024 PRO
Fan 1 locked — Fan 1 is locked.
Cause: Internal cooling fan failure detected. Often caused by dust buildup, bearing wear, or debris fouling the fan blades.
Source: ICM.pdf, p.13
Also applies to:IVEM6048IVEM8048-LVIVEM8048
Output voltage is too high
Cause: Internal failure causing high output voltage.
Restart the unit, if the error persists, contact the repair center.
Source: felicitysolar IVEM 6048 Solar Inverter User Guide.pdf, p.37 · FelicitySolar IVEM8048-LV Single Phase Hybrid Inverter User Guide.pdf, p.38
Also applies to:IVEM12048-IIIVEM 8K-12K Series II
Output voltage is too high
Cause: Output voltage exceeds acceptable range.
Restart the unit, if the error persists, contact the repair center.
Source: IVEM8K-12K-II_compressed.pdf, p.43
Over current happen at Battery
Cause: Current into or out of the battery exceeded the protection limit — a charge or discharge surge beyond what the battery stage is rated for.
Restart the unit, if the error persists, contact the repair center.
Source: T-REX-10KLP3G01-Inverter-User-Guide.pdf, p.27
PV4 overcurrent fault — The current of the PV3 string is too large, check the string current.
Cause: Current from the PV4 string exceeded the input stage's protection limit — more current than that MPPT channel is rated to carry.
Source: T-REX-50KHP3G01-user-manual-.pdf, p.45
Also applies to:LUX-X-96050HMG01LUX-X-96050HCG01
Low BMS Temperature — BMS internal temperature is below safe operating limit.
Cause: BMS too cold (ambient temperature below operating range).
Wait for temperature rise.
Source: LUX-X-96050HG01-Lithium-Battery-User-Guide.pdf, p.21
Also applies to:LUX-Y-48100HCG01LUX-Y-48100HMG01LUX-Y-48100HR13G01LUX-Y-48100HR9G01
Low BMS Temperature — BMS temperature is too low.
Cause: BMS too cold — ambient temperature below the operating range.
Wait for temperature rise.
Source: LUX-Y-48100HG01-Lithium-Battery-User-Guide.pdf, p.20
Low BMS Temperature
Cause: BMS too cold — ambient temperature below the operating range.
Source: LUX-Y-48100HG01MN User manual 358-S010025-03 0325(V2.0).pdf, p.27
Also applies to:SCCM4524-IIISCCM4548-IIISCCM6048-IIISCCM8048-IIISCCM10048-IIISCCM12048-III
Battery voltage is different — Detected battery voltage does not match the configured/rated battery voltage of the system.
Cause: Battery is incorrectly wired, has wrong rated voltage configuration (12V/24V/48V), or auto-detection has failed.
Source: felicitysolar SCCM-III MPPT Solar Charge Controller User Guide.pdf, p.18
Heat sink temperature is too low — Fault event: heat sink temperature below its low threshold.
Cause: The heat-sink temperature fell below its lower protection limit — the ambient temperature is too low for operation.
Source: LUX-S-1600LG01.pdf, p.22
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.