Output voltage too high
Also displayed as F23 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 voltage too high — Output voltage is too high.
Cause: The AC output voltage rose above the allowed range. This points to an internal voltage-regulation fault in the inverter stage.
Restart the unit, if the error persists, contact the repair center.
Source: ICM.pdf, p.14
Also applies to:T-REX-3K6LP1G01T-REX-4KLP1G01T-REX-4K6LP1G01T-REX-5KLP1G01T-REX-6KLP1G01T-REX-10KHP3G01T-REX-10KLP3G01
Output voltage is too high
Cause: The inverter measured its own AC output voltage above the permitted range — an internal regulation fault rather than a wiring issue.
Restart the unit, if the error persists, contact the repair center.
Source: T-REX-3_3.6_4_4.6_5_6KLP1G01-hybrid-inverter-user-guide-English.pdf, p.38 · T-REX-10KHP3G01-Inverter-User-Guide.pdf, p.28 · T-REX-10KLP3G01-Inverter-User-Guide.pdf, p.28
Also applies to:IVEM6048
No.2 DCDC current sensor failed
Cause: Second DC/DC current sensor hardware failure.
Restart the unit, if the error persists, contact the repair center.
Source: felicitysolar IVEM 6048 Solar Inverter User Guide.pdf, p.37
Also applies to:IVEM12048-IIIVEM 8K-12K Series II
No.2 DCDC current sensor failed
Cause: Second DCDC current sensor failure.
Restart the unit, if the error persists, contact the repair center.
Source: IVEM8K-12K-II_compressed.pdf, p.44
Also applies to:IVEM8048
No.2 DCDC current sensor failed
Cause: The second DC/DC current sensor returned an out-of-range or implausible reading, so the control board can no longer trust that channel's current measurement.
Restart the unit, if the error persists, contact the repair center.
Source: FelicitySolar IVEM8048-LV Single Phase Hybrid Inverter User Guide.pdf, p.38
Battery 2 overcurrent fault — Battery 2 current is too large, check the battery charge and discharge power.
Cause: Battery 2 current tripped the hardware overcurrent protection, which acts independently of the firmware — a fast surge in charge or discharge current on that channel.
Source: T-REX-50KHP3G01-user-manual-.pdf, p.46
Also applies to:Apollo-5KLP1G01-M1Apollo-5KLP1G01-M2Apollo-4K6LP1G01-MXApollo-4K6LP1G01-M1Apollo-4K6LP1G01-M2
Output voltage is too high
Cause: Output voltage is too high.
Restart the unit, if the error persists, contact the repair center.
Source: Apollo-5KLP1G01-All-in-one-ESS-User-Guide.pdf, p.43
All T-REX-3KLP1G01 codes All T-REX-10KHP3G01 codes All T-REX-10KLP3G01 codes
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.