Midea ATOM MDV-V28WDHN1 Manual page 101

Atom B Series VRF 50/60Hz
Notes for installers
The communication wires should be connected to the outdoor unit terminals indicated in Figure 3-8.3 and Table
3-8.2.
Caution
 Communication wiring has polarity. Care should be taken to connect the poles correctly.
Figure 3-8.3: Outdoor unit communication terminals
Figure 3-8.4: System power wiring example
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Table 3-8.2: Communication connections
Terminals
X Y E Connect to centralized controller or gateway
P Q E Connect between indoor units and outdoor unit
Connection