Gree NCHS2D Owner's Manual page 35

GMV6 HR Mode Exchange Box
(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.5.3.7
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