How do I clear or fix error E33?

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.

E33

Felicity inverter error E33

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

Login Fault

Cause: An internal login/registration handshake failed: the control firmware could not bring the affected module online.

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: E-CHO-SI3KS2-Operation-Manual.pdf, p.17 · E-CHO-SI5KS2-Operation-Manual.pdf · E-CHO-SI8KS2-Operation-Manual.pdf

Frequently asked questions

What does error E33 mean on a Felicity inverter?: E33 means: Login Fault. An internal login/registration handshake failed: the control firmware could not bring the affected module online.
Is error E33 a fault or a warning?: E33 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 E33?: 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.

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.