PCS-ARM-25Fault

Felicity ESS error PCS-ARM-25

ARM software fault - AC main connection switching-on failure

Fault — the ESS unit enters fault protection and stops normal operation until the fault is cleared — how it is shown (LED pattern or display code) depends on the model.

FLS-ES232LC-S

Energy storage systemFault

What it means

ARM software fault - AC main connection switching-on failure

Cause: AC main contactor failed to close.

How to fix it

  1. Reset to restart.
  2. Does not occur on domestic version.
  3. If foreign version reports during startup three consecutive times, contact manufacturer to confirm insulation detection logic and contactor sticking.

Source: fls-es232lc-g-2-fls-es232lc-s-user-guide-en.pdf

Frequently asked questions

What does error PCS-ARM-25 mean on a Felicity ESS?

PCS-ARM-25 means: ARM software fault - AC main connection switching-on failure. AC main contactor failed to close.

Is error PCS-ARM-25 a fault or a warning?

PCS-ARM-25 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.

How do I clear or fix error PCS-ARM-25?

Reset to restart. Does not occur on domestic version.

Related error codes

Other codes on the FLS-ES232LC-S

All FLS-ES232LC-S 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.