What does error 0x9012 mean on a Felicity ESS?

0x9012 means: Manual disconnect switch (QS) in the battery cluster high-voltage box is disconnected. QS feedback signal anomaly detected inside SBCU (judgment made only after receiving applying high voltage command).

Is error 0x9012 a fault or a warning?

0x9012 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.

0x9012

Felicity ESS error 0x9012

Manual disconnect switch (QS) in the battery cluster high-voltage box is disconnected

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

Manual disconnect switch (QS) in the battery cluster high-voltage box is disconnected

Cause: QS feedback signal anomaly detected inside SBCU (judgment made only after receiving applying high voltage command).

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.

Source: FLS-ES232LC-S.pdf

Frequently asked questions

What does error 0x9012 mean on a Felicity ESS?: 0x9012 means: Manual disconnect switch (QS) in the battery cluster high-voltage box is disconnected. QS feedback signal anomaly detected inside SBCU (judgment made only after receiving applying high voltage command).
Is error 0x9012 a fault or a warning?: 0x9012 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.
How do I clear or fix error 0x9012?: Send faults externally, limit power, request lower high voltage; if command not received within 5s, cut off the main circuit relay.

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.