Which pressure does a high pressure limit control monitor in a compressor?

The high pressure limit control specifically monitors the pressure within the compressor discharge line. This component is crucial for ensuring the safe operation of the air conditioning system. When the refrigeration system operates, the compressor compresses refrigerant gas and discharges it into the condenser at high pressure. The high pressure limit control acts as a safeguard, preventing excessively high pressures that could potentially lead to equipment damage or failure.

If the pressure exceeds a pre-set threshold, the high pressure limit control will deactivate the compressor, protecting the components of the system from risks associated with high pressure conditions, such as ruptures or leaks. Monitoring this specific point in the system is critical for system reliability and efficiency, as it ensures that the compressor operates within its design parameters.

The other choices pertain to different pressures within the refrigeration cycle but do not focus on the compressor's discharge line pressure, which is the primary role of the high pressure limit control.