How do I clear or fix error W10?

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.

W10

Felicity inverter error W10

Over-frequency derating alarm

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

T-REX-50KHP3G01

InverterFault

What it means

Over-frequency derating alarm — The frequency is too high, the inverter reduce the power.

Cause: Grid frequency has risen above the derating threshold, so the inverter automatically reduces its output power while the condition lasts.

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.44

Frequently asked questions

What does error W10 mean on a Felicity inverter?: W10 means: Over-frequency derating alarm. Grid frequency has risen above the derating threshold, so the inverter automatically reduces its output power while the condition lasts.
Is error W10 a fault or a warning?: W10 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 W10?: 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 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.