I have a three-phase system with two multis on each phase. they are connected to the victron cerbo gx and to the batteries. I'm trying to control the system with ESS mode 3 through modbus tcp. the system info screen shows #6 and #7 on the buttom and the whole system is not charging or discharging the batteries. in addition the low battery LED is flashing on all of the 6 multipluses.