How do I clear or fix error 64?

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.

Felicity inverter error 64 (F64)

IGBT over-temperature fault

Also displayed as F64 on some models.

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

T-REX-50KHP3G01

InverterFault

What it means

IGBT over-temperature fault — Inverter device temperature is too high.

Cause: The power-stage IGBT temperature exceeded its protection limit — sustained high load, high ambient temperature, or restricted cooling.

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-25-50khp3g01-user-guide-en.pdf, p.48

Frequently asked questions

What does error 64 mean on a Felicity inverter?: 64 means: IGBT over-temperature fault. The power-stage IGBT temperature exceeded its protection limit — sustained high load, high ambient temperature, or restricted cooling.
Is error 64 a fault or a warning?: 64 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 64?: 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.