When I need to enable the the inverter "External ATS" function?

INCORRECT line sequence (R-R, S-S, T-T, N-N) will damage the inverter. To avoid the damage, the default “Disable” has been set to “Enable” in “ExternalATS” under “Advance Settings”. Users should set the default setting back to“Disable”. External ATS needs to be set to “Enable” only when a matebox advanced or EPS box or EPS parallel is connected.