Tribeca F6-3.6L (2008)
Refrigerant Pressure Sensor / Switch: Testing and Inspection
Pressure Switch (Triple Pressure Switch)
INSPECTION
1. Connect the manifold gauge to the service valve on the high-pressure side.
2. Operate the air conditioner, and check the switch operating pressure on ON/OFF in the compressor (magnet clutch). Each switch operates as
follows.
NOTE:
-
High pressure switch turns the compressor (magnet clutch) to OFF when the refrigerant pressure becomes extremely high, in order to prevent
the evaporator, air conditioner piping and expansion valve from getting damaged or frozen.
-
Middle pressure switch effectively controls the radiator fan output by judging high load/low load in normal pressure range.
-
Low pressure switch turns the compressor (magnet clutch) to OFF, judging as low refrigerant level when the refrigerant pressure becomes
extremely low, in order to prevent the possible seizure when the compressor rotates.
