What does error 0x10C3 mean on a Felicity ESS?

0x10C3 means: Low insulation fault, single cabinet with no MBCU (level 3). Insulation resistance ≤ 100 Ω/V.

Is error 0x10C3 a fault or a warning?

0x10C3 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.

0x10C3

Low insulation fault, single cabinet with no MBCU (level 3)

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

Energy storage systemCritical

Low insulation fault, single cabinet with no MBCU (level 3)

Cause: Insulation resistance ≤ 100 Ω/V.

Send faults to EMS, limit power, request lower high voltage; if command not received within 5s, cut off the main circuit relay.

Source: FLS-ES232LC-S.pdf

What does error 0x10C3 mean on a Felicity ESS?: 0x10C3 means: Low insulation fault, single cabinet with no MBCU (level 3). Insulation resistance ≤ 100 Ω/V.
Is error 0x10C3 a fault or a warning?: 0x10C3 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.
How do I clear or fix error 0x10C3?: Send faults to EMS, limit power, request lower high voltage; if command not received within 5s, cut off the main circuit relay.

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