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22-182-21. Automatic Address Setting2-21-1. Basic wiring diagramLink wiringA terminal plug (black) is attached to each of the outdoor unit control PCBs.At only one outdoor unit, leave the terminal plug short-circuit socket on the “Yes” side.At all the other outdoor units, change the socket (from “Yes” to “No”).A maximum of 8 indoor units can be connected to 1 remote controller for group control.3-11-1 2-1Fig. 2-15System addressrotary switch onthe outdoor unitPCBTerminal plate 1, 2Inter-unit controlwiring(Change setting to “1”)Refrigerant system No. 1No. 1Terminal plate 1, 2Outdoor unit(Change setting to “2”)Refrigerant system No. 2No. 2 Change the terminalplug (black) short-circuit socketNo. 3 Change the terminalplug (black) short-circuit socketRemote controller(Change setting to “3”)Refrigerant system No. 3Remote controllerRemote controllerIndoor unitNOTEAutomatic address setting from the outdoor unitCase 1If the power can be turned ON separately for the indoor and outdoor units in the system, the indoor unitaddresses can be set without running the compressor.(1) Turn on the indoor and outdoor unit power for refrigerant system 1.Press and hold the automatic address setting button (black) for 1 second or longer at the outdoor unitwhere the power was turned ON.Communication for automatic address setting begins.LED 1 and 2 on the outdoor unit control PCB blink alternately, and turn OFF when address setting iscompleted. (2) Next, turn ON the power only at the indoor and outdoor units in a different system.Press the automatic address setting button (black) on the outdoor unit.LED 1 and 2 on the outdoor unit control PCB blink alternately, and turn OFF when address setting iscompleted.Repeat the same procedure for each system and complete automatic address setting.(3) Operation using the remote controller is now possible.
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