3239483 - E6020 AIR CONDITIONING - Functional description (Manual Air Conditioning)

Functional description

The climate control unit M70 supply is controlled by the ignition (INT/A) - pin 8 of connector A - from the line protected by fuse F6 of the additional fuse box B98. is supplied directly at pin 4 of connector A from the line protected by fuse F10 of the junction unit B1. Climate control unit M70 also receives a supply controlled by the ignition (INT) at pin 7 of connector A from the line protected by fuse F4 of the additional fuse box B98B. The supply for illuminating the controls with the side lights on reaches pin 5 of connector A from the line coming from the switch for the steering column switch unit H5 protected by fuse F1 of the additional fuse box B98B. Pin 3 of connector A of M70 is earthed. The air conditioning system is equipped with three activators for recirculation ( N82), air mixing (N81) and air distribution (N80). The recirculation actuator N82 is operated by the control unit M70 from pins 18, 19, 20 and 21 of connector A. The air mixing actuator N81 is controlled from control unit M70 from pins 10, 11, 12, 13 of connector B. The distribution actuator N80 is controlled from control unit M70 from pins 23, 24, 25 and 26 of connector B. An electronic governer M72 controls fan N85 at different speeds via an earth command: this is ignition-operated (INT/A) from a line protected by fuse F6 of supplementary fuse box B98B. receives an control input signal from pin 1 and returns a feedback signal to pin 9 of connector A of M70. Fan N85 is supplied directly from a line protected by maxifuse A/C of B99. Pin 11 of connector A of M70 controls engagement of the compressor See E6021 COMPRESSOR ENGAGEMENT . It should be remembered that the climate control control unit only 'houses' the control button and the LED, but does not in any way affect the heated rear windscreen activation strategy  See E3030  HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING .