of the refrigeration system 10 in order to maintain a first set of secondary operating conditions referring to fig1 the purpose of the first set of secondary operating conditions is to quench the compressor 16 with liquid refrigerant if the compressor 16 overheats referring to fig1 and 3 the microprocessor 104 reads 240 the compressor discharge temperature t d sensor 108 the compressor discharge temperature t d sensor 108 may be physically located between the compressor 16 and the condenser 20 or on the compressor 16 itself a compressor discharge temperature threshold value t threshold is provided 242 to the microprocessor 104 the t threshold value is determined by the manufacturer of the particular compressor 16 being used in the refrigeration system 10 a suitable compressor 16 for use in the refrigeration system 10 is a thermo king corporation double screw compressor with a t threshold value of approximately 310 u00b0 f the value for t threshold may be stored in a memory location accessible by the microprocessor 104 the microprocessor 104 determines 244 whether t d is greater than t threshold if t d is not greater than t threshold the compressor 16 is operating within its temperature range i e the compressor is not overheating accordingly.