Compressor HVAC: Description and Operation

The standard front A/C system uses a Denso 7SBU16C double-acting, variable swash plate-type A/C compressor. This A/C compressor has a label identifying the use of R-134a refrigerant and both the suction and discharge ports located on the cylinder head.

The optional A/C compressor used for add-on rear A/C systems is a Denso 10S17C ten cylinder, double-acting swash plate-type A/C compressor. This A/C compressor has a label identifying the use of R-134a refrigerant and has a fixed displacement of 170 cubic centimeters (10.374 cubic inches), and has both the suction and discharge ports located on the cylinder head at the rear of the compressor.

The A/C compressor is driven through an electric clutch, drive arrangement. The A/C compressor by the engine pulley and belt is lubricated by refrigerant oil that is circulated throughout the refrigerant system with the refrigerant.

The A/C compressor draws in low-pressure refrigerant vapor from the A/C evaporator through its suction port. It then compresses the refrigerant into a high-pressure, high-temperature refrigerant vapor, which is then pumped to the A/C condenser through the compressor discharge port.

The A/C compressor cannot be repaired. If faulty or damaged, the entire compressor must be replaced. The compressor clutch, pulley, and coil, are available for service.