What is the relationship between the FDECU-2 and compressor crankcase heaters?

The correct answer highlights the function of the FDECU-2 (Fan Drive Electronics Control Unit) in relation to compressor crankcase heaters. The FDECU-2 is designed to manage components of the HVAC/R system, including temperature regulation, which directly involves crankcase heaters.

In this context, the reference to "two crankcase heaters" indicates that the FDECU-2 can manage crankcase heaters for the compressor, ensuring that they operate effectively to prevent refrigerant flooding and to maintain optimal temperatures for system efficiency.

Crankcase heaters are crucial for keeping the compressor oil warm, especially during system off-cycles, to prevent liquid refrigerant from accumulating in the crankcase. By managing multiple heaters, the FDECU-2 enhances the reliability and longevity of the compressor and ensures consistent operation.

This is why the option describing the FDECU-2's interaction with two crankcase heaters that illuminate correctly illustrates its role in maintaining optimal compressor health through temperature control.