What happens every 6 hours when a simple timed defrost system is set for an interval of 6 hours?

In a simple timed defrost system that is set for a 6-hour interval, the system performs a defrost cycle every 6 hours regardless of the actual conditions. This means that defrost is initiated even if there is no significant frost buildup on the evaporator coils. The purpose of this timed cycle is to prevent excessive ice accumulation, which can hinder the system's efficiency and performance.

By initiating a defrost cycle every 6 hours, the system ensures that any frost present on the coils is melted, maintaining optimal airflow and heat exchange. However, it does not take into account the real-time need for defrost, which can lead to unnecessary energy use and potential disruptions in the cooling process if defrost is performed when it is not needed. This operational characteristic highlights the limitations of a simple timed defrost system compared to more advanced systems that can detect frost accumulation.