1.CHECK GROUND CONNECTION
 
 2.CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
 
 3.DETECT MALFUNCTIONING PART
 
 4.CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
 
 5.DETECT MALFUNCTIONING PART
 
 6.CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
 
 7.DETECT MALFUNCTIONING PART
 
 8.CHECK INTERMITTENT INCIDENT