Is error 0x8023 a fault or a warning?

0x8023 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.

How do I clear or fix error 0x8023?

Send faults externally, limit power, request lower high voltage; if command not received within 5s, cut off the main circuit relay. Latch - manual troubleshooting is required.

0x8023

Felicity ESS error 0x8023

Battery cluster thermal runaway alarm

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

Battery cluster thermal runaway alarm

Cause: Thermal runaway detected by any of: 1) Vmin<0.5V & Tmax>65°C; 2) Vmin<0.5V & Tmax-Tmin>30°C; 3) Vmin<0.5V & dT/dt>1°C/s; 4) Voltage sampling disconnection fault & Tmax>65°C; 5) Voltage sampling disconnection fault & Tmax-Tmin>30°C; 6) Voltage sampling disconnection fault & dT/dt>1°C/s; Vmin<0.5V & NTC sampling break or short circuit; Aerosol operation (AI1>9V on any BMU as judged by SBCU) & Tmax>65°C; Any BMU air pressure change rate ≥ 0.1 kPa/s.

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.
Latch - manual troubleshooting is required.

Source: FLS-ES232LC-S.pdf

Frequently asked questions

What does error 0x8023 mean on a Felicity ESS?: 0x8023 means: Battery cluster thermal runaway alarm. Thermal runaway detected by any of: 1) Vmin<0.5V & Tmax>65°C; 2) Vmin<0.5V & Tmax-Tmin>30°C; 3) Vmin<0.5V & dT/dt>1°C/s; 4) Voltage sampling disconnection fault & Tmax>65°C; 5) Voltage sampling disconnection fault & Tmax-Tmin>30°C; 6) Voltage sampling disconnection fault & dT/dt>1°C/s; Vmin<0.5V & NTC sampling break or short circuit; Aerosol operation (AI1>9V on any BMU as judged by SBCU) & Tmax>65°C; Any BMU air pressure change rate ≥ 0.1 kPa/s.
Is error 0x8023 a fault or a warning?: 0x8023 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.
How do I clear or fix error 0x8023?: Send faults externally, limit power, request lower high voltage; if command not received within 5s, cut off the main circuit relay. Latch - manual troubleshooting is required.

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.