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
+ Топлевная 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
      19.8.2. Insufficient cooling of air - the operative test
      19.8.3. Check of tightness of system of cooling of air
   + 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



19.8. Diagnostics of malfunctions

19.8.1. Check of system of cooling of air
THE GENERAL DATA

In the presence of signs of malfunction of system of cooling:

1) to Check up external surfaces and a radiator and the condenser to be convinced of absence of contaminations (a dirt, leaves, etc.) and in possibility of free movement of air through honeycombs of heat exchangers. To examine also space between a radiator and the condenser.

2) to Check up, whether there are no deformed and pressed tubes in the heat exchanger, hoses, pipelines, etc.

3) to Check up serviceability of the fan.

4) to Check up all air lines on presence of thinnesses or contaminations. The low expense of air can specify in capacity reduction of the heat exchanger of the evaporator.

5) to Check up presence of proslipping of coupling of the compressor.

6) to Check up a tension drive a compressor belt.

7) At presence in compressor V-5 system KB to spend control checks.

Possible malfunctions and methods of their elimination (System KB with coolant R-12)
SIGNS THE REASON ELIMINATION
At inclusion of a signalling device of a high pressure the compressor stops The steam valve of a tank is closed To open the valve
The tank is completely filled by a coolant To remove and replace a tank
To check up calibration of a weight platform or to consult with factory experts
The compressor continues to work after achievement разряжения 432 mm Hg (57,5 кПа) The vacuum switch is faulty To replace the switch
The compressor joins, but does not work Compressor overheat To cool the compressor
The switch of limiting temperature is faulty Consult with factory experts
The compressor is faulty To replace the compressor to Add 90-120 ml of refrigerating oil of mark 150 in a cavity всасывания at the working compressor
There is not enough oil in the compressor
The stain in the centre of the indicator of humidity does not change the colour with yellow on green (after work within two hours) Humidifying of the filter of a dehumidifier To remove and replace the dehumidifier filter
Insufficient quantity of a coolant To add a coolant to norm in a tank
Decolouration of the indicator of humidity To remove and replace the indicator
The compressor does not provide level разряжения in system of 432 mm Hg (57,5 кПа)
There is not enough oil in the compressor
To add 90-120 ml of refrigerating oil of mark 150 in a cavity всасывания at the working compressor
Leaks in system To eliminate leaks
The compressor is faulty To replace the compressor
There is no coolant movement
The liquid valve of a tank is closed To open the valve in system contours in a mode
The steam valve of a tank is closed To open the valve recycling
The pump is disconnected To switch off and again to include the pump

The coolant pump is faulty

To remove and replace the pump






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