Daewoo Nexia

Since 1994 of release

Repair and car operation

Daewoo Nexia
+ The maintenance instruction
+ Maintenance service
+ The engine
+ 3. The engine (two top camshafts)
+ Cooling system
+ Fuel and exhaust systems
+ Electric chain
+ 7. Ignition system
+ 8. The electronic block of management and gauges
+ Transmission
+ 10. A five-speed transmission and the main transfer RPO MM5
+ 11. Automatic Transmission
+ Steering
+ Running gear
+ 14. A forward suspension bracket
+ 15. A drive of forward wheels
+ 16. A back suspension bracket
+ Brake system
+ Body
- Heating, ventilation
   19.2. Air central air
   19.3. Diagnostics of malfunctions
   19.4. Features of the conditioner
   19.5. Work of a central air of air
   + 19.6. Management of air central air
   19.7. The relay and switches
   + 19.8. Diagnostics of malfunctions
   + 19.9. Maintenance service
   + 19.10. Removal and installation of knots of a central air of air
   19.11. Compressor V-5 – the work description
+ Electric equipment

19.7. The relay and switches

The high pressure switch

The high pressure switch (the pressure relay) is located on a back cover of the compressor and connected to a target pressure head highway. The switch protects the compressor from excessive increase of pressure of forcing and reduces coolant losses through редукционный the valve. Normally closed relay of pressure breaks off an electric chain of the compressor at achievement of pressure of forcing 2965 кПа 138 кПа. At pressure decrease approximately to level 1375 кПа 345 кПа the relay again includes the compressor.

The switch of low pressure

On some cars for предохра нения the compressor the switch of low pressure (the pressure relay) which can settle down in a back cover of the compressor is used or join a hydraulic highway where circulates жидкии a coolant. The switch works at losses and decrease in a charge of a coolant in system SQ. This switch also prevents compressor inclusion at low temperature of air.

The switch of the compressor and signalling device of loading of the steering hydraulic booster

On some cars steady frequency of idling of the engine обеспечи вается normally included switch of the compressor reacting to increase of loading of the pump of the steering hydraulic booster. At maneuvering on a place when pressure increases in the hydraulic booster, the compressor is automatically switched off. In other cases использу ется a signalling device of loading of the steering amplifier (normally switched off relay of pressure), working at increase in pressure of forcing of the pump of the hydraulic booster. To a relay signal reacts ECU the engine which supports steady frequency of idling.

The compressor switch at full opening throttle заслонки

The switch located in a drive throttle заслонки, breaks off an electric chain of the relay of inclusion of electromagnetic coupling and disconnects the compressor at full opening throttle заслонки. On the cars equipped with system of multidot injection of fuel, at full opening throttle заслонки the gauge of position throttle заслонки (ДДЗ) sends a signal in ECU which in the subsequent operates inclusion of coupling of the compressor.

The relay of a delay of a central air of air

On some cars there is a relay of a delay of system KB which disconnects the compressor during engine start-up.