22-52-8. System ControlSystem control refers to the link wiring connection for control of simultaneous-operation multi systems,group control, and main-sub remote controller control.2-8-1. Basic wiring diagramSingle typeBe careful to avoid miswiring when connecting the wires.(Miswiring will damage the units.)(for 3-phase Outdoor unit)1 21 2NU1U212L3L2L1LNFig. 2-5System address rotary switch(Set to “0” at the time of shipment.)Inter-unit control wiringOutdoor unitLeakage breakerGroundGroundWHTBLKIndoorunit(Optional)Wired remotecontrollerLeakage breakerRemote controller wiring(Wiring procedure)(1) Connect the remote controller to the indoor unit remote controller wiring terminal plate (1, 2).(Remote controller wiring)(2) Connect the indoor units (U1, U2) and the outdoor units (1, 2). Connect the other outdoor units and indoorunits (with different refrigerant systems) in the same way. (Inter-unit control wiring)Connect the remote controller communication wiring to the indoor units (U1, U2) for each refrigerant system.(Inter-unit control wiring)(3) Connect the remote controller communication wiring (2 wires) from the remote controller wiring terminal plate(1, 2) on the indoor unit (unit where the remote controller is connected) to the remote controller terminal plates(1, 2) on the other indoor units. (Remote controller communication wiring)(4) Turn ON both the indoor and outdoor unit power and perform automatic address setting from the remotecontroller. (For the automatic address setting procedure, refer to 2-8-4.)Models with auxiliary heaters cannot be used for communication wiring of the indoor unit power wires.(Use a pull box to divide the wiring.)Be sure to use the indoor unit temperature sensor (body sensor) when using this control. (Status at shipment.)*NOTE
