53Fault

Felicity inverter error 53 (F53)

AC current DC component fault

Also displayed as F53 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

AC current DC component fault — DC component detected in AC current output.

Cause: A DC component beyond the permitted limit was detected in the AC output current — the output waveform has developed an asymmetry the inverter is not allowed to feed to loads or the grid.

How to fix it

  1. Restart the system 2~3 times
  2. If the fault still exists, please contact us for help.

Source: Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf, p.54

T-REX-3KLP1G01

InverterFault

Also applies to:T-REX-3K6LP1G01T-REX-4KLP1G01T-REX-4K6LP1G01T-REX-5KLP1G01T-REX-6KLP1G01

What it means

PV parallel failure

Cause: The PV1/PV2 parallel-mode setting does not match how the strings are actually wired — the unit expects paralleled inputs and does not see them, or the reverse.

How to fix it

  1. Please confirm whether PV1 and PV2 need to be set to parallel mode.
  2. If not, please turn off this function in APP.
  3. If necessary, please confirm whether the wiring of PV1 and PV2 is connected to parallel mode.

Source: T-REX-3_3.6_4_4.6_5_6KLP1G01-hybrid-inverter-user-guide-English.pdf, p.39

T-REX-10KHP3G01

InverterFault

Also applies to:Apollo-5KLP1G01-MXApollo-5KLP1G01-M1Apollo-5KLP1G01-M2Apollo-4K6LP1G01-MXApollo-4K6LP1G01-M1Apollo-4K6LP1G01-M2

What it means

PV parallel failure

Cause: PV1 and PV2 paralleling configuration mismatch.

How to fix it

  1. Please confirm whether PV1 and PV2 need to be set to parallel mode.
  2. If not, please turn off this function in APP.
  3. If necessary, please confirm whether the wiring of PV1 and PV2 is connected to parallel mode.

Source: T-REX-10KHP3G01-Inverter-User-Guide.pdf, p.29 · Apollo-5KLP1G01-All-in-one-ESS-User-Guide.pdf, p.44

T-REX-50KHP3G01

InverterFault

What it means

Grid Over-frequency Fault — The grid frequency is too high, check whether the grid frequency is within the normal range.

Cause: The grid frequency is above the inverter's permitted operating window, so it disconnects until the frequency settles back into range.

How to fix it

  1. Power down the inverter, wait 5 minutes for capacitors to discharge, then restart.
  2. 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.47

Frequently asked questions

What does error 53 mean on a Felicity inverter?
It depends on the model — 5 devices use code 53. On the IVGM5KL-P1G1 it means: AC current DC component fault. The card for each model on this page gives its exact meaning and fix.
Is error 53 a fault or a warning?
53 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 53?
1. Restart the system 2~3 times; 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-3KLP1G01

All T-REX-3KLP1G01 codes

Other codes on the T-REX-10KHP3G01

All T-REX-10KHP3G01 codes All Apollo-5KLP1G01-MX 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.