BUS C H- /AB B- S ECU R E @ HO M E2CSM 6 0072 7D0 9 01 4 /5613.1.2 Electrical power network........................................................................................5113.2 Placing system in maintenance mode...................................................................................5113.2.1 Replacing the central unit battery........................................................................5113.2.2 SIM Replacement ..................................................................................................... 5213.2.3 Central unit reset..................................................................................................... 5213.2.4 Adding devices ........................................................................................................ 5213.2.5 Deleting devices ...................................................................................................... 5213.2.6 Replacing devices.................................................................................................... 5213.2.7 Central unit firmware update ............................................................................... 5314 Problem solving ....................................................................................................................... 5415 Central unit technical specifications ..................................................................................... 5516 cyber security disclaimer ........................................................................................................ 5616.1 Network Manager ..................................................................................................................... 56