5.1 General. Use of this standard results in a single number, A-weighted sound power level rating for the unit under test. One-third octave band Sound Power Levels, octave band Sound Power Levels or calculated A-weighted Sound Power Levels may be used to obtain this rating. Sound ratings for each operating condition of interest shall be determined with the equipment under test operating in a fully loaded, pull down mode of operation. Care must be exercised to ensure that there is a sufficient difference between the set point and the outdoor/box temperatures such that the unit under test does not cycle or unload during the test.