PCS-ARM-09Warning

Felicity ESS error PCS-ARM-09

ARM software fault - AC overvoltage

Warning — a protection warning — the ESS unit keeps running, but deal with the cause before it escalates.

FLS-ES232LC-S

Energy storage systemWarning

What it means

ARM software fault - AC overvoltage

Cause: AC bus overvoltage.

How to fix it

  1. Reset to restart. When AC undervoltage cannot be recovered: 1) Check whether AC switch is disconnected or grid is blacked out
  2. Where there is no disconnection, confirm whether the AC insurance is blown.

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

Frequently asked questions

What does error PCS-ARM-09 mean on a Felicity ESS?

PCS-ARM-09 means: ARM software fault - AC overvoltage. AC bus overvoltage.

Is error PCS-ARM-09 a fault or a warning?

PCS-ARM-09 is a warning: the unit keeps running. Fix the underlying condition before it escalates.

How do I clear or fix error PCS-ARM-09?

Reset to restart. When AC undervoltage cannot be recovered: 1) Check whether AC switch is disconnected or grid is blacked out; 2) Where there is no disconnection, confirm whether the AC insurance is blown.

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.