PCB Red light on Continually-Outdoor not start

Solve Red Light PCB Fault

I found a Problem in Old Daikin AC that its red Light is on Continually and not Start Outdoor. That PCB was not giving the Current to the Outdoor. When i open his PCB form Outdoor. i check his Sensor that both sensor is Fine (Coil and Room Sensor). But the room sensor was changed with another model of AC’s PCB. that’s why the PCB was not working. Then i bought a new original sensor of this model from Old AC Market and change with room Sensor. Then the PCB started running well.