194001672 - E6020 AIR CONDITIONER - OPERATING DESCRIPTION

The manual climate control system control unit M070 receives an ignition controlled power supply (INT and INT/A from the steering lock control unit) at pins 19 and 17 respectively via the lines protected by fuses F49 and F31 of the junction unit under the dashboard B002; it receives a direct supply from the battery at pin 25 via the line protected by fuse F39 of B002.Pin 23 of M70 is earthed.The control unit M070, from pin 32, controls the engagement of the passenger compartment additional air relay J121, by means of an earth signal, and the control H081 receives an earth.The fan control H081 controls N085 at different speeds via the governor O030: the control signal varies according to the position of the knob and therefore the number of resistances it passes through producing three different voltage signals for the fan N085 which consequently turns at three different speeds.The control unit M070, from pin 31, controls the engagement of the passenger compartment fan speed maximum relay J041, by means of an earth signal, which on closing excludes the governor resistance O030.The recirculation actuator N82 is operated by the control unit M70 from pins 20 and 22.The distribution actuator N080 is operated by the control unit M070 from pins 4 and 5 and receives a power supply for the potentiometer from pin 29 of M070, a reference earth from pin 8 of M070 and sends a feedback signal to pin 27 of M070.The mixture actuator N081 is operated by the control unit M070 from pins 1 and 21 and receives a power supply for the potentiometer from pin 13 of M070, a reference earth from pin 7 of M070 and sends a feedback signal to pin 26 of M070.The fan N085 receives a direct power supply from the battery via the line controlled by relay T8 and protected by fuse F8 housed in the engine compartment junction unit B001.Pin 16 of M070 controls the engagement of the compressor.    See E6021 COMPRESSOR ENGAGEMENTThe controls for the heated rear windscreen are connected to pins 14 and 30 of M070.    See E3030 HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTINGThe +lights signal for the dimmed lighting of the ideograms in the control unit reaches pin 28 of M070.    See E2530 INSTRUMENT LIGHTING