2429920 - E6020 AIR CONDITIONING - Functional description

Functional description

Fan N85 is supplied when the ignition is switched on (INT/A) from the line protected by fuse F31 of the junction unit B2 under the facia and controlled by the relay T8 dedicated fuse F8 of the engine compartment junction unit B1. Control knob H81 controls the fan at different speeds via regulator O30: the control signal - earth signal - varies according to knob position and crosses or does not cross the coils of regulator O30 to determine four different voltage signals for fan N85, which thus turns at 4 different speeds.

The fan N85 operates at the first speed if the button for engaging the compressor is pressed, even if the control knob H81 is in position '0' See E6021 COMPRESSOR ENGAGEMENT .