Output short circuit
Also displayed as F19 on some models.
Fault — the inverter cuts its output and the red LED stays solid until the fault is cleared.
The exact meaning depends on your model:
Also applies to:IVCM2024 PROIVCM3024 PRO
Output short circuit
Cause: A short circuit was detected on the AC output: a wiring fault or a failed appliance pulling far more current than any normal load.
Check if wiring is connected well and remove abnormal load.
Source: ICM.pdf, p.13
Also applies to:IVGM6KL-P1G1IVGM7K6L-P1G1IVGM8KL-P1G1
Battery Open Circuit Alarm — Battery open, check battery wiring.
Cause: The inverter no longer detects a battery on its terminals — the circuit reads open, typically a loose, broken or disconnected battery cable or a tripped battery breaker.
Check battery wiring.
Source: Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf, p.51
Also applies to:T-REX-3K6LP1G01T-REX-4KLP1G01T-REX-4K6LP1G01T-REX-5KLP1G01T-REX-6KLP1G01
Output short circuited
Cause: A short circuit was detected on the inverter output: current spiked while voltage collapsed, pointing to a wiring fault or an abnormal (shorted) load.
Check if wiring is connected well and remove abnormal load.
Source: T-REX-3_3.6_4_4.6_5_6KLP1G01-hybrid-inverter-user-guide-English.pdf, p.38
Also applies to:IVEM6048
Over temperature happen at battery circuit
Cause: The temperature of internal battery converter component is over the limitation.
Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.
Source: felicitysolar IVEM 6048 Solar Inverter User Guide.pdf, p.37
Also applies to:IVEM12048-IIIVEM 8K-12K Series IIIVEM8048-LVIVEM8048
Over temperature happen at Convert L circuit
Cause: The temperature of Convert L battery converter component is over the limitation.
Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.
Source: IVEM8K-12K-II_compressed.pdf, p.43 · FelicitySolar IVEM8048-LV Single Phase Hybrid Inverter User Guide.pdf, p.38
Also applies to:T-REX-10KLP3G01
Output short circuited
Cause: Wiring fault or abnormal load on the output.
Check if wiring is connected well and remove abnormal load.
Source: T-REX-10KHP3G01-Inverter-User-Guide.pdf, p.28 · T-REX-10KLP3G01-Inverter-User-Guide.pdf, p.28
Battery 2 Undervoltage fault — Battery 2 voltage is too low, the battery should be charged.
Cause: Battery 2 voltage has fallen below the permitted range — the pack is deeply discharged and must be charged before normal operation resumes.
Source: T-REX-50KHP3G01-user-manual-.pdf, p.46
Also applies to:Apollo-5KLP1G01-M1Apollo-5KLP1G01-M2Apollo-4K6LP1G01-MXApollo-4K6LP1G01-M1Apollo-4K6LP1G01-M2
Output short circuited — Output short circuit detected.
Cause: Output short circuited.
Check if wiring is connected well and remove abnormal load.
Source: Apollo-5KLP1G01-All-in-one-ESS-User-Guide.pdf, p.43
OutputRes is error — Fault event: output resistance / output stage error detected.
Cause: Output resistance measured outside the normal range — possibly a loose connection, oxidised terminal, or an output-stage fault.
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.