Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
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Fig.5.3.2
(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.
1) Wired controller is shown as Fig.5.4.1, wireless controller is shown as Fig.5.4.2, signal
receiver is provided with panel as standard accessory.
Fig.5.4.1 Fig.5.4.2
2) Both IDU and wired controller are equipped with signal receiver, and available for
wireless control respectively.
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.
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