Heating diagnosis 911 Carrera (996) · General information

Heating diagnosis 911 Carrera (996) General information Function of auto recirculation At outside temperatures of > 26 aG,following Switch-on conditions for engine an initial system ventilation time of 30 seconds, compartment fan the program switches to recirculation mode in order to accelerate the cooling phase. The engine compartmentfan is switched on when the engine compartment Control of the air-conditioning compressor temperature is > 80 °C Activation of the air-conditioningcompressor or depends on the outside temperature, intake air temperature and coolant temperature. the coolant temperature is > 102 DC. Activation: -Outside temperature?: 5 DC After-running of engine compartment fan -Intake air temperature> 3 °C If the ignition is switched off and the engine compartmenttemperature is more than 60 °C, -Coolant temperature < 115 DC the DME control module remains in readiness -Ignition on for another 20 minutes. During this time, the engine compartmenttemperature is retrieved The air-conditioning compressor is switched every 10 seconds. If the engine compartment on 7 seconds after the engine is started, temperature is > 85 oCrthe engine compartment at the earliest. fan is switched on for 20 seconds. If the engine compartmenttemperature is still> 85 °C after Switch-on conditions for coolant this time, the fan remains on for a further or condenser blower motors 30 seconds. Stage 1 is switched on when the coolant temperature is > 100 °c or there is an A/C demand,the intake air temperature is > 8 °C and terminal 15 is switched on. Stage 2 is switched on when the coolant temperature is > 105 °C or the refrigerant pressure is > 16 bar. 80-D4 80 01 Diagnosis/troubleshooting, heating 99680Dl Printed in Germany -11, 1998