65Fault

Felicity inverter error 65 (F65)

Heatsink high temperature fault

Also displayed as F65 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

Heatsink high temperature fault — Heatsink over-temperature fault.

Cause: Inverter internal temperature has exceeded the safe operating threshold. Causes include high ambient temperature, blocked cooling vents, failed cooling fan, or installation in direct sunlight.

How to fix it

  1. Check whether the work environment temperature is too high
  2. Turn off the inverter for 15mins and restart
  3. 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

Ambient Overtemperature — The ambient temperature of the inverter is too high.

Cause: Inverter internal temperature has exceeded the safe operating threshold. Causes include high ambient temperature, blocked cooling vents, failed cooling fan, or installation in direct sunlight.

How to fix it

  1. Power down the inverter and let it cool.
  2. Inspect cooling vents and fan inlets for dust, leaves, or insect nests — clean with compressed air.
  3. Confirm the inverter is installed in a shaded, ventilated location with the manufacturer's required clearances on all sides.
  4. If the fan does not spin on restart, fan replacement is required.

Source: T-REX-50KHP3G01-user-manual-.pdf, p.48

Frequently asked questions

What does error 65 mean on a Felicity inverter?
It depends on the model — 2 devices use code 65. On the IVGM5KL-P1G1 it means: Heatsink high temperature fault. The card for each model on this page gives its exact meaning and fix.
Is error 65 a fault or a warning?
65 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 65?
1. Check whether the work environment temperature is too high; 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.