A method comprising: determining a target capacity for a scroll compressor having intermeshing scroll members (14, 16), a motor, a scroll separation system for separating said intermeshing scroll members (14, 16), and a delayed suction system for releasing pressure from at least one intermediate chamber created by said intermeshing scroll members (14, 16); determining (1506, 1512, 1520) whether said target capacity is within a first predetermined capacity range and a second predetermined capacity range, said first predetermined capacity range and said second predetermined capacity range each having an upper capacity range and a lower capacity range; operating said motor at a first speed when said target capacity is within said first predetermined capacity range and at a second speed when said target capacity is within said second predetermined capacity range, wherein said first speed is higher than said second speed; operating (1510, 1524) said scroll separation system according to a first pulse width modulation cyclic ratio, with said delayed suction system deactivated, when said target capacity is within said upper capacity range of said first predetermined capacity range or said upper capacity range of said second predetermined capacity range, said first pulse width modulation cyclic ration being determined based on said target capacity and said first or second speed; operating (1518, 1530) said scroll separation system according to a second pulse width modulation cyclic ratio, with said delayed suction system activated, when said target capacity is within said lower capacity range of said first predetermined capacity range or said lower capacity range of said second predetermined capacity range, said second pulse width modulation cyclic ratio being determined based on said target capacity and said first or second speed. determining a target capacity for a scroll compressor having intermeshing scroll members (14, 16), a motor, a scroll separation system for separating said intermeshing scroll members (14, 16), and a delayed suction system for releasing pressure from at least one intermediate chamber created by said intermeshing scroll members (14, 16); determining (1506, 1512, 1520) whether said target capacity is within a first predetermined capacity range and a second predetermined capacity range, said first predetermined capacity range and said second predetermined capacity range each having an upper capacity range and a lower capacity range; operating said motor at a first speed when said target capacity is within said first predetermined capacity range and at a second speed when said target capacity is within said second predetermined capacity range, wherein said first speed is higher than said second speed; operating (1510, 1524) said scroll separation system according to a first pulse width modulation cyclic ratio, with said delayed suction system deactivated, when said target capacity is within said upper capacity range of said first predetermined capacity range or said upper capacity range of said second predetermined capacity range, said first pulse width modulation cyclic ration being determined based on said target capacity and said first or second speed; operating (1518, 1530) said scroll separation system according to a second pulse width modulation cyclic ratio, with said delayed suction system activated, when said target capacity is within said lower capacity range of said first predetermined capacity range or said lower capacity range of said second predetermined capacity range, said second pulse width modulation cyclic ratio being determined based on said target capacity and said first or second speed.