U-Match Series Service Manual
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off during installation.
(5) In order to avoid abnormal operation due to electromagnetic interference, etc., pay attention to
the following notes during connecting wires:
1) Make sure the tie-in interface of communication wire is correct, otherwise it may lead to
communication malfunction.
2) The signal wires and communication wires of wired controller should be separated from
power cord and connection wire between indoor unit and outdoor unit.
3) If the air conditioner is installed at the strong electromagnetic interference place, signal wire
and communication wire of wired controller must use shielding twisted wire.
5.3 Installation of Wired Controller
Firstly, the selection and connection way of wired controller‟s signal wire are as below:
(1) Choose suitable signal wire: 2-core signal wire (wire diameter >=0.75mm, wire length<30m and
the recommended length is 8m).
(2) Make sure the power of indoor unit is cut off; fix the signal wire of wired controller on the wiring
board for wired controller of indoor unit with screws; make sure the signal wire is solid.
Then, the detailed installation procedures of wired controller are as shown in Figure 2-5-2:
Figure 2-5-2 Installation of wired controller
Brief instructions of installation procedure:
a) Pull out the 2-core signal wire in the installation hole of the wall and then let this wire go
through the hole at the back of wired controller‟s base plate.
b) Fix the base plate and installation hole of the wall together with screw M4×25.
c) Fix the above mentioned 2-core signal wire on the copper insert X1 and X2 with the
equipped screws of wired controller.
d) Fasten the wired controller‟s panel with its base plate together.
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