What does error 56 mean on a Felicity inverter?

It depends on the model — 2 devices use code 56. On the IVGM5KL-P1G1 it means: INV short circuit fault. The card for each model on this page gives its exact meaning and fix.

How do I clear or fix error 56?

1. Please check the connection of buckup is firmly and correctly; 2. The exact steps for each affected model are listed on this page.

Felicity inverter error 56 (F56)

INV short circuit fault

Also displayed as F56 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:

IVGM5KL-P1G1

InverterFault

Also applies to:IVGM6KL-P1G1IVGM7K6L-P1G1IVGM8KL-P1G1

What it means

INV short circuit fault — Inverter output short circuit fault.

Cause: The inverter detected a short circuit on its output: current spiked while voltage collapsed, pointing to a wiring fault or a shorted load on the backup circuit.

How to fix it

Please check the connection of buckup is firmly and correctly
Restart and check whether it is in normal
Seek help from us, if can not go back to normal state.

Source: Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf, p.54

T-REX-50KHP3G01

InverterFault

What it means

Grid Overload Fault — The load of the grid access is too large, and the load should be reduced.

Cause: The load drawn through the grid connection exceeds the permitted level, so the inverter trips until the load is reduced.

How to fix it

Power down the inverter, wait 5 minutes for capacitors to discharge, then restart.
If the fault recurs immediately or repeatedly, record the exact code and contact your installer or the manufacturer's service line.

Source: T-REX-50KHP3G01-user-manual-.pdf, p.47

Frequently asked questions

What does error 56 mean on a Felicity inverter?: It depends on the model — 2 devices use code 56. On the IVGM5KL-P1G1 it means: INV short circuit fault. The card for each model on this page gives its exact meaning and fix.
Is error 56 a fault or a warning?: 56 is a fault code: the inverter cuts its output and the red LED stays solid until it is cleared.
How do I clear or fix error 56?: 1. Please check the connection of buckup is firmly and correctly; 2. The exact steps for each affected model are listed on this page.

Related error codes

Other codes on the IVGM5KL-P1G1

All IVGM5KL-P1G1 codes

Other codes on the T-REX-50KHP3G01

All T-REX-50KHP3G01 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.