How do I clear or fix error E3?

Wait for the grid to stabilize — the inverter reconnects automatically once frequency returns to spec. Persistent faults during otherwise normal operation usually indicate a wrong grid-code setting; confirm the inverter is configured for your country/utility.

Felicity inverter error E3

Grid Freq High

Fault — the inverter cuts its output and the red LED stays solid until the fault is cleared.

E-CHO-SI3KS2

InverterFault

Also applies to:E-CHO-SI5KS2E-CHO-SI8KS2

What it means

Grid Freq High — Grid frequency above acceptable range.

Cause: Grid frequency has risen above the regional maximum. Frequency excursions usually indicate a major generation/load imbalance on the utility side.

How to fix it

Wait for the grid to stabilize — the inverter reconnects automatically once frequency returns to spec.
Persistent faults during otherwise normal operation usually indicate a wrong grid-code setting; confirm the inverter is configured for your country/utility.

Source: E-CHO-SI3KS2-Operation-Manual.pdf, p.16 · E-CHO-SI5KS2-Operation-Manual.pdf · E-CHO-SI8KS2-Operation-Manual.pdf

Frequently asked questions

What does error E3 mean on a Felicity inverter?: E3 means: Grid Freq High. Grid frequency has risen above the regional maximum. Frequency excursions usually indicate a major generation/load imbalance on the utility side.
Is error E3 a fault or a warning?: E3 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 E3?: Wait for the grid to stabilize — the inverter reconnects automatically once frequency returns to spec. Persistent faults during otherwise normal operation usually indicate a wrong grid-code setting; confirm the inverter is configured for your country/utility.

Related error codes

Other codes on the E-CHO-SI3KS2

All E-CHO-SI3KS2 codes All E-CHO-SI5KS2 codes All E-CHO-SI8KS2 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.