Is error 0x9052 a fault or a warning?

0x9052 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.

How do I clear or fix error 0x9052?

Send faults externally, limit power, request lower high voltage; if command not received within 5s, cut off the main circuit relay. Recovers when BJB_NTC < 50°C.

0x9052

Felicity ESS error 0x9052

Q: What does error 0x9052 mean on a Felicity ESS?

0x9052 means: Excessive temperature in the high-voltage box of the battery cluster. SBCU detects BJB_NTC > 60°C.

Excessive temperature in the high-voltage box of the battery cluster

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

Excessive temperature in the high-voltage box of the battery cluster

Cause: SBCU detects BJB_NTC > 60°C.

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 BJB_NTC < 50°C.

Source: FLS-ES232LC-S.pdf

Frequently asked questions

What does error 0x9052 mean on a Felicity ESS?: 0x9052 means: Excessive temperature in the high-voltage box of the battery cluster. SBCU detects BJB_NTC > 60°C.
Is error 0x9052 a fault or a warning?: 0x9052 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.
How do I clear or fix error 0x9052?: Send faults externally, limit power, request lower high voltage; if command not received within 5s, cut off the main circuit relay. Recovers when BJB_NTC < 50°C.

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.