Air Conditioning System Related Malfunctions1. Sensor, relay failure(1) During the entire control process of the air-conditioning system, the controller processes and issues control signals by receiving the signals from each temperature sensor.
Typical air conditioning systems provide bleed air from two engines or the APU (a separate gas turbine engine that provides power and air when the engines are not running). The bleed air from the engine is drawn from the medium-pressure or high-pressure compressor. Because of the compressor, it is very hot. Before entering the air-conditioning system, it must be pre-cooled by a precooler, and then sent to the air-conditioning system.