What detects system pressure to control the operation of the LPAC?

What detects system pressure to control the operation of the LPAC?

• A. Compressor Management System
• B. Pressure Switch Assembly
• C. Engine Control Module
• D. Fuel Oil Control System

Answer: (A)

The main idea is how the system uses pressure feedback to control the LPAC. The compressor management system is the controller that monitors system pressure and decides when to start or stop the LPAC to keep pressure in the desired range, protect the system from overpressure, and coordinate proper operation with other systems. It receives input from pressure sensing elements and issues the appropriate control signals to the LPAC drive. A pressure switch assembly is part of the sensing network and provides a pressure-related signal, but it does not itself make the control decision. The engine control module and the fuel oil control system manage other functions (engine performance, fuel handling) and do not regulate LPAC pressure.

The main idea is how the system uses pressure feedback to control the LPAC. The compressor management system is the controller that monitors system pressure and decides when to start or stop the LPAC to keep pressure in the desired range, protect the system from overpressure, and coordinate proper operation with other systems. It receives input from pressure sensing elements and issues the appropriate control signals to the LPAC drive.

A pressure switch assembly is part of the sensing network and provides a pressure-related signal, but it does not itself make the control decision. The engine control module and the fuel oil control system manage other functions (engine performance, fuel handling) and do not regulate LPAC pressure.