2889471 - E6021 COMPRESSOR ENGAGEMENT - Description (Air Conditioner)

Description

The right button in the climate control control panel in the centre of the dashboard switches on the air cooling and dehumidifying circuit, activating the air conditioning compressor.

The above button enables the operation of the air refrigeration circuit; the actual switching on of the compressor, however, also depends on the operation of:

• the frost thermostat sensor, near the evaporator, which stops the air conditioning being switched on if the temperature of the evaporator is too low;
• the 3 stage pressure switch, located in the refrigerant circuit, which stops the air conditioning being switched on if the pressure of the fluid is too low or too high;
• the engine control unit which, according to the engine management logic, excludes the operation of the compressor, for example in the case of high engine temperatures or in the case of high engine loads (sharp acceleration).

For more details  see DESCRIPTION AND OPERATION: 5040  AIR CONDITIONING CASING AND COMPONENTS . The compressor supply circuit is controlled by a specific relay, lcoated in the engine compartment in the relay and fuse box; the relay supply line is protected by a special fuse in the fuse box.