PACK high-voltage connector overtemperature
Critical — the ESS unit shuts down and latches a protection fault. Don't keep restarting it — the cause needs checking first.
PACK high-voltage connector overtemperature
Cause: Temp21 or Temp22 on any BMU as judged by SBCU: T > 90°C.
Source: fls-es232lc-g-2-fls-es232lc-s-user-guide-en.pdf
0x90A3 means: PACK high-voltage connector overtemperature. Temp21 or Temp22 on any BMU as judged by SBCU: T > 90°C.
0x90A3 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.
Send faults to EMS, limit power, request lower high voltage; if command not received within 5s, cut off the main circuit relay. Latch - manual troubleshooting is required.
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.