Figure 3.7
1-to-1 1-to-1 1-to-1
One controller to one indoor unit connection method
One controller to one indoor unit connection method
Two controllers to one indoor unit connection method
3-4-2 Communication wiring
• The communication between the indoor unit and wired controller is bi-directional
communication. The parameters displayed on the wired controller are refreshed in real time
according to changes in the parameters of the indoor unit.
• X1 and X2 are terminals to connect the indoor unit and wired controller. There is no polarity
between X1 and X2.
• The longest wiring length between the wired controller and indoor unit is 200 meters.
P/Q/E
P/Q/E P/Q/E
P/Q/E
X1/X2
○○○
X1/X2
X1/X2
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