Multi VRF Floor Standing Indoor Unit
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(3) Connect the communication line to terminal D1 and D2 on the 4-digit
wiring board of indoor unit, as shown in Fig 5.4.
Fig 5.4
Fig 5.5
(4) Secure the communication line with the wire clamp on the 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 5.5.
5.4 Connection of Communication Line of Wired Controller
(1) Open the cover of electric box of indoor unit.
(2) Lead the communication line of wired controller across the rubber ring.
(3) Connect the communication wire to terminal H1 and H2 of indoor 4-bit
wiring board.
(4) Fix the communication wire with wire clip on the electric box.
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