MCAC-VTSM-2015-09      R410A All DC Inverter V4+S Series 60Hz 
Specifications  &  Performances 39 
5.2 Field wiring 
5.2.1 Signal wire between outdoor unit and indoor unit 
Signal  wire  of  indoor/outdoor  unit  adopts  3-core  shielded  wire  (≥0.0012in.
2
(0.75mm
2
)  which  has  polarity, 
please connect it correctly. 
 
5.2.2 Example wiring connection