A pressure switch is installed on the high-pressure side of the refrigeration cycle. When the switch detects abnormal pressure in the refrigeration cycle, it stops the compressor to prevent the trouble from expanding to protect the components in the refrigeration cycle.
2.Abnormal low pressure detection
Working the compressor when the refrigerant in the refrigeration cycle is extremely insufficient or when no refrigerant is in the refrigeration cycle due to a gas leak or other causes deteriorates the lubrication of the compressor oil, which could cause the compressor to seize. When the refrigerant pressure abnormally lowers (less than 0.2 MPa (2kgf /cm