System Description; Special Servicing Tools And Equipment - Aston Martin DB7 Workshop Manual

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Air Conditioning
System Description
System Description
The in-car temperature and humidity are regulated by the electronically controlled air conditioning system. The
system comprises four subsystems:
• heater matrix, supplied with water from the engine cooling system
• refrigeration
• vacuum
• electronic control
Apart from the ambient temperature sensor and the aspirated in-car temperature sensor, most of the components
are housed in the air conditioning unit (Fig. 1) situated behind the dash board, or in the engine compartment.
Figure 1.
Key to Fig. 1 - Left Hand Air Conditioning Unit
1. Upper feedback potentiometer
2. Water temperature switch
3. Lower feedback potentiometer
4. Vacuum valve block
5. Vacuum restrictor
6. Condensate drain tube
Figure 2.
Key to Fig. 2 - Right Hand Air Conditioning Unit
1. Upper servo motor
2. Electronic control module
3. Lower servo motor
4. Evaporator sensor
5. Condensate drain tube
Special Servicing Tools and Equipment
1 PDU system
1 Charging station
1 Leak detector
1 Temperature test box
1 Sanden compressor service tool kit
1 C M Type compressor service tool kit
1 Digital voltmeter
1 Multimeter
May 1996
8-7