Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
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(4) Fix the communication cable with clamp of electric box.
(5) In order to ensure the reliability of communication between IDU and ODU and the communication
among each IDU, add a matched resistance(supplied in a package before ex-factory) on the
wiring board of the last indoor unit in a series connection. The matched resistance should be
connected in parallel between terminal screw D1 and D2, as shown in Fig 5.3.2.
5.4 Connection of Communication Wire for Wired Controller
(1) Detach the electric box cover.
(2) Let the communication wire pass through the wiring through-holes.
(3) Connect the communication wire to terminal H1 and H2 of indoor 4-bit wiring board.
(4) Fix the communication wire with clamp.
(5) Wiring instructions of signal receiver and wired controller.
Electric Box Cover
Left Cover Plate
Fig 5.4.1
(6) Both IDU and wired controller are equipped with signal receiver, and available for remote control
respectively. (Fig 5.4.2)
Fig 5.4.2
5.5 Wiring Instructions of Wired Controller and Indoor Units Network
(1) Communication wire of indoor unit and outdoor unit (or indoor unit) is connected to D1, D2.
(2) Wired controller is connected to H1, H2.
(3) One indoor unit can connect two wired controllers that must be set as master one and slave
one.
(4) One wired controller can control 16 indoor units in maximum at the same time. (as shown in
Fig 5.5)
