Multiplus turns off without any alarm

Good morning, I have a system with three multiplus 48/5000 in single-phase parallel, without grid, with a genset, Deye lifepo4 batteries (30kWh). The Cerbo turns on the genset at 48 volts and when the batteries reach 56 volts it turns it off but the Multiplus ones also turn off, and can only be turned back on from the Cerbo. No alarm appears. I don’t know why they turn off.