Reliable, solid-state, time-initiated, temperature-terminated defrost system Service valves positioned for quick installation and easy service Low pressure switch for loss of charge system protection Trade-available components Defrost control features built-in diagnostics for easier service Defrost control has short cycle protection to protect compressor Defrost control is Quiet Shift capable Defrost cycle is field selectable 30/60/90 minutes Enhanced aluminum fins and copper tubing for high efficiency and capacity Raised coil prevents debris from collecting in bottom of coil and causing loss of airflow High-efficiency scroll compressor R410a refrigerant Grommet-mounted compressor for quiet operation Internally protected against high-temperature motor overload conditions Heavy-duty compressor sound blanket for quiet operation