What does error PCS-ARM-52 mean on a Felicity ESS?

PCS-ARM-52 means: ARM software fault - abnormal busbar imbalance. Bus imbalance detected.

Is error PCS-ARM-52 a fault or a warning?

PCS-ARM-52 is a warning: the unit keeps running. Fix the underlying condition before it escalates.

Reset to restart. 1) Fault elimination lasts about 1h after DC cut off.

PCS-ARM-52

ARM software fault - abnormal busbar imbalance

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

Energy storage systemWarning

ARM software fault - abnormal busbar imbalance

Cause: Bus imbalance detected.

Reset to restart
Fault elimination lasts about 1h after DC cut off
If cannot be reset, contact manufacturer for voltage sampling and capacitor aging issues
If reset works but repeatedly reports after startup, contact manufacturer.

Source: FLS-ES232LC-S.pdf

What does error PCS-ARM-52 mean on a Felicity ESS?: PCS-ARM-52 means: ARM software fault - abnormal busbar imbalance. Bus imbalance detected.
Is error PCS-ARM-52 a fault or a warning?: PCS-ARM-52 is a warning: the unit keeps running. Fix the underlying condition before it escalates.
How do I clear or fix error PCS-ARM-52?: Reset to restart. 1) Fault elimination lasts about 1h after DC cut off.

Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.