Grid Reverse Sequence Alarm
Also displayed as F38 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:IVGM6KL-P1G1IVGM7K6L-P1G1IVGM8KL-P1G1
Grid Reverse Sequence Alarm — Grid phase sequence reversed, check grid phase sequence wiring.
Cause: The phase sequence the inverter detects at its grid terminals is reversed relative to what it expects, so it cannot synchronise until the grid wiring order is corrected.
Check grid phase sequence wiring.
Source: Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf, p.52
Also applies to:T-REX-3K6LP1G01T-REX-4KLP1G01T-REX-4K6LP1G01T-REX-5KLP1G01T-REX-6KLP1G01
Leakage current fault
Cause: Ground leakage current above the safety limit was detected — insulation or grounding on the PV or AC side is letting current return outside the normal conductors.
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
Also applies to:T-REX-10KLP3G01
Leakage current fault
Cause: Ground leakage current above the safety limit was detected — insulation or grounding on the PV or AC side is letting current return outside the normal conductors.
Restart the unit, if the error persists, contact the repair center.
Source: T-REX-10KHP3G01-Inverter-User-Guide.pdf, p.29 · T-REX-10KLP3G01-Inverter-User-Guide.pdf, p.28
Positive and negative bus imbalance fault — Positive bus voltage does not match negative bus voltage, shutdown and restart.
Cause: The positive and negative halves of the internal DC bus no longer match in voltage — an internal balancing fault in the conversion stages.
Source: T-REX-50KHP3G01-user-manual-.pdf, p.47
Also applies to:Apollo-5KLP1G01-M1Apollo-5KLP1G01-M2Apollo-4K6LP1G01-MXApollo-4K6LP1G01-M1Apollo-4K6LP1G01-M2
Leakage current fault — Leakage current fault detected.
Cause: Leakage current fault.
Restart the unit, if the error persists, contact the repair center.
Source: Apollo-5KLP1G01-All-in-one-ESS-User-Guide.pdf, p.43
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.