What does error 0x90A3 mean on a Felicity ESS?

0x90A3 means: PACK high-voltage connector overtemperature. Temp21 or Temp22 on any BMU as judged by SBCU: T > 90°C.

Is error 0x90A3 a fault or a warning?

0x90A3 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.

How do I clear or fix error 0x90A3?

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.

0x90A3

Felicity ESS error 0x90A3

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.

FLS-ES232LC-S

Energy storage systemCritical

What it means

PACK high-voltage connector overtemperature

Cause: Temp21 or Temp22 on any BMU as judged by SBCU: T > 90°C.

How to fix it

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.

Source: FLS-ES232LC-S.pdf

Frequently asked questions

What does error 0x90A3 mean on a Felicity ESS?: 0x90A3 means: PACK high-voltage connector overtemperature. Temp21 or Temp22 on any BMU as judged by SBCU: T > 90°C.
Is error 0x90A3 a fault or a warning?: 0x90A3 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.
How do I clear or fix error 0x90A3?: 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.

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.