Faults for high temperature of built-in MPPT
Also displayed as F87 on some models.
Warning — the red LED flashes and the inverter keeps running. Deal with it before it escalates.
Severity differs by model — check your model below.
The exact meaning depends on your model:
Also applies to:IVPS2512IVPS2524IVPS3524IVPS5024IVPS5048IVPS7548IVPS-7548IVPS10048+3
Faults for high temperature of built-in MPPT — The built-in MPPT charge controller reports high temperature.
Cause: The built-in MPPT charge controller has overheated.
Source: IVPS-IVPM User Guide.pdf, p.18
Also applies to:IVGM6KL-P1G1IVGM7K6L-P1G1IVGM8KL-P1G1
Fan2 Failed Alarm — Fan 2 malfunction, check fan for proper functioning.
Cause: Internal cooling fan failure detected. Often caused by dust buildup, bearing wear, or debris fouling the fan blades.
Source: Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf, p.52 · Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf, p.56
Also applies to:T-REX-3K6LP1G01T-REX-4KLP1G01T-REX-4K6LP1G01T-REX-5KLP1G01T-REX-6KLP1G01T-REX-10KHP3G01
Battery input circuit failure
Cause: The battery input circuit failed its self-check — the path between the battery terminals and the internal DC stage is not behaving as expected, which points to an internal fault rather than the battery itself.
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.39 · T-REX-10KHP3G01-Inverter-User-Guide.pdf, p.29
Battery input circuit failure
Cause: The battery input circuit failed its self-check — the path between the battery terminals and the internal DC stage is not behaving as expected, which points to an internal fault rather than the battery itself.
Restart the unit, if the error persists, contact the repair center.
Source: T-REX-10KLP3G01-Inverter-User-Guide.pdf, p.29
Parallel CAN communication — The inverter is connected to abnormal parallel communication.
Cause: Communication has been lost between the inverter and a peripheral device — typically a battery BMS, smart meter, or external monitoring dongle.
Source: T-REX-50KHP3G01-user-manual-.pdf, p.48
Also applies to:Apollo-5KLP1G01-M1Apollo-5KLP1G01-M2Apollo-4K6LP1G01-MXApollo-4K6LP1G01-M1Apollo-4K6LP1G01-M2
Battery input circuit failure
Cause: Battery input circuit failure.
Restart the unit, if the error persists, contact the repair center.
Source: Apollo-5KLP1G01-All-in-one-ESS-User-Guide.pdf, p.44
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.