What does error W54-W65 mean on a Felicity inverter?

W54-W65 means: BMS detect something wrongs happened. BMS has detected an internal fault or abnormal condition.

Is error W54-W65 a fault or a warning?

W54-W65 is a warning: the red LED flashes and the unit keeps running. Fix the underlying condition before it escalates.

W54-W65

BMS detect something wrongs happened

Warning — the red LED flashes and the inverter keeps running. Deal with it before it escalates.

InverterWarning

Also applies to:IVEM12048-IIIVEM 8K-12K Series II

BMS detect something wrongs happened — Warning: BMS detect something wrongs happened (range covers BMS internal alarm codes 54 through 65).

Cause: BMS has detected an internal fault or abnormal condition.

If the code is keeping for long time, please contact with your installer.

Source: IVEM8K-12K-II_compressed.pdf, p.42

What does error W54-W65 mean on a Felicity inverter?: W54-W65 means: BMS detect something wrongs happened. BMS has detected an internal fault or abnormal condition.
Is error W54-W65 a fault or a warning?: W54-W65 is a warning: the red LED flashes and the unit keeps running. Fix the underlying condition before it escalates.
How do I clear or fix error W54-W65?: If the code is keeping for long time, please contact with your installer.

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