Audi 80/90/Coupe

since 1986-1991 release

Repair and operation of the car



Audi 80/90/Coupe
+ 1.2. Identification of the car
+ 2. Engines, carburetors
3. Lubrication system
+ 4. Cooling system
+ 5. Fuel system
+ 6. Exhaust system
+ 7. System of ignition
+ 8. Transmission
+ 9. Suspension brackets, wheels
+ 10. Brake system
+ 11. Steering
+ 12. Body, salon
- 13. Air conditioning system
   13.2. Pressure switches
   13.3. Water descent valve
   13.4. Wedge-shaped compressor belt of the conditioner
   13.5. Check of vacuum system
   13.6. Places of connections of lines of coolant, throttle
   13.7. Conditioner compressor
   13.8. Conditioner compressor coupling
+ 14. Electric equipment


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13.2. Pressure switches

GENERAL INFORMATION

Models with the 4-cylinder engine

1. Switch of high pressure of the conditioner
2. Store
3. Switch of low pressure of coolant of the conditioner
4. Vacuum tank
5. A hose for water descent
6. Throttle
7. Compressor of the air conditioner
8. The serving valve of low pressure
9. Conditioner compressor coupling
10. Condenser
11. Switch of high pressure of coolant
12. Safety switch of the conditioner

Switch of high pressure of the conditioner

The switch can be determined by red color of the case (it is specified by an arrow).

Switches off the conditioner compressor if pressure of coolant increases too highly.

This switch can be removed, without lowering the conditioner cooling system.

Inhaling moment: 10 N. of m.

Switch of high pressure of coolant

The switch has the yellow or green case with welded connections (it is specified by an arrow).

Switches the fan cooling a radiator to the second operating mode when pressure of coolant reaches a certain value.

The switch can be removed, without lowering the conditioner cooling system.

Inhaling moment: 10 N. of m.

Models with the 5-cylinder engine

1. Throttle
2. Switch of low pressure of coolant of the conditioner
3. Vacuum tank
4. A hose for water descent
5. Condenser
6. Safety switch of the conditioner
7. Switch of high pressure of coolant
8. Switch of high pressure of the conditioner
9. Compressor of the conditioner and its coupling
10. Store
11. The serving valve of low pressure

Switch of high pressure of the conditioner

The switch can be determined by red color of the case.

Switches off the conditioner compressor if pressure of coolant increases too highly.

This switch can be removed, without lowering the conditioner cooling system.

Inhaling moment: 10 N. of m.

Switch of high pressure of coolant

The switch has the yellow or green case with welded connections.

Switches the fan cooling a radiator to the second operating mode when pressure of coolant reaches a certain value.

The switch can be removed, without lowering the conditioner cooling system.

Switch of low pressure of coolant

The switch controls evaporator temperature, periodically switching on and off the conditioner compressor.

The switch also switches off the compressor when coolant pressure too low.

The switch is located from the passenger between a casing of the evaporator and the fire-prevention partition separating salon from the engine.

The switch can be removed, without lowering the conditioner cooling system.

Removal

PERFORMANCE ORDER
1) remove a dividing partition under a ware box
2) remove the control unit of fuel injection (it is specified by an arrow)
3) remove the switch of low pressure of coolant
Prevention

Surely use goggles and gloves when you remove the switch of low pressure.