What does error 0x1033 mean on a Felicity ESS?

0x1033 means: Battery cluster cell overvoltage alarm (level 3). Cell voltage > 3,800 mV.

Is error 0x1033 a fault or a warning?

0x1033 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.

Send faults externally, limit power and request lower high voltage; immediately cut off the main circuit relay. Recovers when < 3,700 mV.

0x1033

Battery cluster cell overvoltage alarm (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

Battery cluster cell overvoltage alarm (level 3)

Cause: Cell voltage > 3,800 mV.

Send faults externally, limit power and request lower high voltage; immediately cut off the main circuit relay.
Recovers when < 3,700 mV.

Source: FLS-ES232LC-S.pdf

What does error 0x1033 mean on a Felicity ESS?: 0x1033 means: Battery cluster cell overvoltage alarm (level 3). Cell voltage > 3,800 mV.
Is error 0x1033 a fault or a warning?: 0x1033 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.
How do I clear or fix error 0x1033?: Send faults externally, limit power and request lower high voltage; immediately cut off the main circuit relay. Recovers when < 3,700 mV.

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