Fan 2 locked
Also displayed as F09 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 2 locked — Fan 2 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:T-REX-3K6LP1G01T-REX-4KLP1G01T-REX-4K6LP1G01T-REX-5KLP1G01T-REX-6KLP1G01
Overload
Cause: The connected load exceeds the inverter's continuous output rating; the buzzer beeps twice every second and protection will cut the output if the load is not reduced.
Source: T-REX-3_3.6_4_4.6_5_6KLP1G01-hybrid-inverter-user-guide-English.pdf, p.37
Also applies to:IVEM6048
Output short circuited
Cause: Wiring issue or abnormal load causing a short circuit.
Check if wiring is connected well and remove abnormal load.
Source: felicitysolar IVEM 6048 Solar Inverter User Guide.pdf, p.37
Also applies to:IVEM12048-IIIVEM 8K-12K Series II
Output short circuited
Cause: Short circuit on AC output wiring or connected load.
Check if wiring is connected well and remove abnormal load.
Source: IVEM8K-12K-II_compressed.pdf, p.43
Also applies to:IVEM8048
Output short circuited
Cause: Wiring not connected well or abnormal load.
Check if wiring is connected well and remove abnormal load.
Source: FelicitySolar IVEM8048-LV Single Phase Hybrid Inverter User Guide.pdf, p.38
PV1 reverse connection fault — Pv1 string positive and negative connection, check the string wiring.
Cause: The PV1 string is connected with positive and negative reversed, so the input stage blocks it until the string wiring is corrected.
Source: T-REX-50KHP3G01-user-manual-.pdf, p.45
Also applies to:LUX-X-96050HMG01LUX-X-96050HCG01
High Cell Temperature — Battery cell temperature has exceeded safe operating limit.
Cause: Cell overheating due to high ambient temperature or high current operation.
Stop charging and discharging, wait for the temperature to drop.
Source: LUX-X-96050HG01-Lithium-Battery-User-Guide.pdf, p.21
Also applies to:LUX-Y-48100HCG01LUX-Y-48100HMG01LUX-Y-48100HR13G01LUX-Y-48100HR9G01
High Cell Temperature — Cell temperature is too high.
Cause: Cell overheating due to high ambient temperature or high-current operation.
Stop charging and discharging, wait for the temperature to drop.
Source: LUX-Y-48100HG01-Lithium-Battery-User-Guide.pdf, p.20
High Cell Temperature
Cause: Cell overheating due to high ambient temperature or high-current operation.
Source: LUX-Y-48100HG01MN User manual 358-S010025-03 0325(V2.0).pdf, p.27
Cell temperature is too high — Fault event: battery cell temperature exceeded its high threshold (operating ranges: charging 0 to 55 deg C, discharging -20 to 55 deg C).
Cause: A battery cell temperature exceeded the upper protection limit — possibly excessive ambient temperature, high current, or impaired ventilation.
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.