What happens during prolonged stops with the lubricating oil in the compressors used in the refrigeration?

  The refrigerant mixes with the lubricating oil by increasing the volume of the mixture (oil / refrig.) In the crankcase. This blend is poor in lubrication. When the bearings begin to suffer the friction of the crankshaft they heat (evaporating the refrigerant) and can be damaged. It is recommended to avoid this type of problem by placing a solenoid valve in the liquid line and a crankcase resistance. In this way the liquid will not migrate and migrate the heat of the resistance evaporates it before starting to cause damage.