Critical

0x9022

Fuse (FU1) in the battery cluster high-voltage box is disconnected.

1 Devices that report this code
FLS-ES232LC-SEnergy storage system↗ view on device
0x9022Fuse (FU1) in the battery cluster high-voltage box is disconnected.Critical— level 3
Cause

FU1 feedback signal anomaly detected inside SBCU.

Recommended fix

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

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