Is error 0x10B3 a fault or a warning?

0x10B3 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.

How do I clear or fix error 0x10B3?

Send faults externally, limit power, request lower high voltage; if command not received within 5s, cut off the main circuit relay. Recovers when Vsum > 2.40V × N.

0x10B3

Felicity ESS error 0x10B3

Cell voltage accumulation undervoltage alarm in battery cluster (level 3)

Critical — the ESS unit shuts down and latches a protection fault. Don't keep restarting it — the cause needs checking first.

FLS-ES232LC-S

Energy storage systemCritical

What it means

Cell voltage accumulation undervoltage alarm in battery cluster (level 3)

Cause: Vsum < 2.30V × N (N = number of battery strings).

How to fix it

Send faults externally, limit power, request lower high voltage; if command not received within 5s, cut off the main circuit relay.
Recovers when Vsum > 2.40V × N.

Source: FLS-ES232LC-S.pdf

Frequently asked questions

What does error 0x10B3 mean on a Felicity ESS?: 0x10B3 means: Cell voltage accumulation undervoltage alarm in battery cluster (level 3). Vsum < 2.30V × N (N = number of battery strings).
Is error 0x10B3 a fault or a warning?: 0x10B3 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.
How do I clear or fix error 0x10B3?: Send faults externally, limit power, request lower high voltage; if command not received within 5s, cut off the main circuit relay. Recovers when Vsum > 2.40V × N.

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.