Connect Communication Wire Of Indoor Unit And Outdoor Unit - Gree NCHS1D Owner's Manual

5.3 Connect Communication Wire of Indoor Unit and Outdoor Unit

(1) Open electric box cover of indoor unit.
(2) Pass the communication wire through rubber ring.
(3) Connect communication wire to wiring board OD (D1, D2) of outdoor unit of Mode Exchange
Box.
(4) Connect communication wire lead from D1and D2 terminal of 4-bit wiring board of indoor unit
to wiring board ID1(1D1，1D2)of indoor unit of Mode Exchange Box; ID2 (2D1,
2D2)......ID-n(nD1，nD2), n≤8; As shown in Fig.5.3.5.
(5) Fix the communication wire with wire-fixing clamp.
(6) In order to ensure the reliability of communication between indoor unit and outdoor unit, add a
matched resistance (in the packing bag) on the wiring board at the last connected Mode
Exchange Box. The matched resistance should be connected among terminal screw D1 and
D2.
(7) When mode converter connects to the indoor unit with capacity of over 16kW, it only requires
to connect the indoor unit to one of the two corresponding branch. Note that the first place in
the SA2 dial code for corresponding mainboard of the two branches is dialed to number end.
Fig.5.3.1
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GMV6 HR Mode Exchange Box
Fig.5.3.2