Compressor HVAC: Description and Operation

Fig. 1 Sanden TRS - 105 Scroll-Type Compressor:

The air conditioning system uses a Sanden TRS-105 fixed displacement scroll-type compressor on all models. This compressor uses an integral thermal limiter switch to protect it from overheating. A label identifying the use of R-134a refrigerant is located on the compressor.

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

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

The compressor cannot be repaired. If faulty or damaged, the entire compressor must be replaced. The thermal limiter switch is only available as a part of a replacement compressor assembly The compressor clutch, pulley, and clutch coil, are available for service.