Midea MCA3U-18HRFNX-QRD0W Service Manual page 37

10.1 Some connectors introduce:
A For remote control (ON-OFF) terminal port CN23 and short connector of JR6
1. Remove the short connector of JR6 when you use ON-OFF function;
2. When remote switch off (OPEN) ;the unit would be off;
3. When remote switch on (CLOSE) ;the unit would be on;
4. When close/open the remote switch, the unit would be responded the demand within 2 seconds;
5. When the remote switch on. you can use remote controller/ wire controller to select the mode
what you want ;when the remote switch off , the unit would not respond the demand from remote
controller/wire controller.
when the remote switch off , but the remote controller / wire controller are on, CP code would be
shown on the display board.
6.The voltage of the port is 12V DC , design Max.current is 5mA.
 Wiring Diagrams 