Rendezvous 2006-2007

Air Conditioning System Diagnosis

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NOTE
General Motors vehicles are now manufactured with fluorescent dye installed directly into the air conditioning (A/C) system.


NOTE
Prior to recovering or charging the refrigerant system, you must use an A/C refrigerant analyzer to identify gas samples taken directly from the refrigeration system or storage containers.

  1. Follow the instructions included with the refrigerant analyzer to obtain the sample for testing.
  2.  
  3. The analyzer will display one of the following :
    1. A green PASS Light Emitting Diode (LED) will light if the purity of the R-134, is better than 98% by weight.
    2.  
    3. A red FAIL LED will light if the purity of the gases does not meet the 98% purity standard.
    4.  
    5. A red FAIL LED and HYDROCARBON light will illuminate and a horn will sound if a hydrocarbon is detected above 5%. This will alert the user of potential hazards.
    6.  

  4.  
  5. If contaminated refrigerant is detected, DO NOT recover the refrigerant into your recovery/recycling equipment.
  6.  

Contaminated Refrigerant Handling




WARNING
If contaminated refrigerant is detected, DO NOT recover the refrigerant into R-134a recovery/recycling equipment.


NOTE
A new suction accumulator or receiver/drier must be installed as directed by the air conditioning system flushing procedure.

  1. Recover the contaminated refrigerant using suitable recovery-only equipment designed for capturing and storing contaminated refrigerant only.
  2.  
  3. If this equipment is not available, contact an A/C service facility in your area with the correct equipment to carry out this service.
  4.  
  5. Determine and correct the cause of the customers initial concern.
  6.  
  7. Flush the air conditioning system.
  8.  
  9. Dispose of the contaminated refrigerant in accordance with all federal, state and local regulations.
  10.  

 
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