Ar-condicionado

412-01-6 Climate Control 412-01-6 DESCRIPTION AND OPERATION Air Conditioning The air conditioning system is controlled by an thermostatic expansion valve. R134a refrigerant is used. Two options are available: ‡ Manual climate control ‡ Air conditioning system with automatic temperature control (DEATC) In order to prevent icing of the evaporator, the vehicles are equipped with a temperature sensor on the evaporator. The sensor measures the surface temperature of the cooling fins on the evaporator. If the measured temperature drops 2 1 6 7 E84427 Item Description 1 Condenser 2 A/C compressor 3 Blower motor 4 Evaporator 5 Expansion valve 6 Refrigerant drier 7 Cooling fan below a temperature of approx. +2 °C then the compressor clutch is deactivated. If the temperature increases above +4 °C the compressor is switched back on again. On systems with manual temperature control, the sensor signal is sent via the body control module (BCM) and the CAN bus to the powertrain control module (PCM), which then switches the compressor clutch on and off. On systems with automatic temperature control (DEATC) the sensor signal is first sent to the air conditioning module and then via the CAN bus to the PCM, which then switches the compressor clutch on and off. 3 4 5 8 10 11 Item Description 8 High pressure (gaseous and hot) High - pressure (liquid and warm) 10 Low - pressure (liquid and cool) 11 Low-pressure (gaseous and cool) Function The refrigerant compressor (2) which is driven by the engine sucks in the gaseous refrigerant from the evaporator (5) and compresses it. The