Nanjing Iveco A30.10 A40.10 middle light vehicle (Henan production) air conditioning system circuit diagram

A30.10
(4) Nanjing Iveco A40: 10 mid-light vehicle (Henan production) air conditioning circuit (Figure 24).
The power supply of the air conditioner switch 10 comes from the G9 end of the car central junction box (15/A line), and it is only possible to cool (or ventilate) at different speeds through the air conditioner manual switch after the ignition switch is turned on.

Manual control I block: When the light-emitting diode V14 is lit, it indicates that the air-conditioning circuit is turned on, the relay 17 is sucked, and the evaporator fans 1, 3 are simultaneously ventilated at a low speed.

Hand control II block: ( Pass) Relay 18 is sucked and medium speed ventilated.

Manual control III Pass), relay 19, 20 pull high speed cooling (or ventilation). In the above three gears, the temperature control switch 11 is also put into operation at the same time, under the action of the thermistor 21, the relays 14, 15 and 16 are controlled as the temperature of the room changes, thereby turning the compressor 13 on and off. , condenser fans 6, 7, 8, 9. The temperature control switch 11 is also acted upon by the pressure control switch 5. When the high pressure is too high (the pipeline is clogged, the refrigerant is excessive), the low pressure is too low (the refrigerant is too small or leaks), the switch MLH makes the temperature control switch open, The compressor is stopped, and the high-voltage fault indicator HP or the low-voltage fault indicator LP is illuminated to remind the driver to repair.

The two ends of the fuses F1~F7 are respectively connected with a light-emitting diode and a step-down resistor R1. When the fuse is blown, the LED is bright, indicating that the road is faulty and easy to find.