volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Detecting leaks in refrigerant circuit using leak detecting systemVAS 6196 or leak detecting systemVAS 6201 > < Leak detection in refrigerant circuit using compressed air or nitrogen
Searching for leaks in refrigerant circuits using leak detectorV.A.G 1796
Searching for leaks in refrigerant circuits using leak detector -V.A.G 1796-
  Note
Small leaks can be detected with, for example, an electronic leak detector.
–  Evacuate refrigerant circuit using an air conditioner service station → Chapter.
  Note
t  If a larger leak is detected during the evacuation process, determine cause and rectify as described → Chapter.
t  If during the evacuation process no leak is detected or a very small leak is detected that but cannot be located, proceed as follows → Chapter.
t  Refrigerant gas is quickly dispersed by air motion. Therefore drafts must be avoided during a search for leaks.
t  If the refrigerant circuit is completely empty, charge with about 10 % of refrigerant capacity (sticker R134a or vehicle-specific workshop manual).
Leak detection:
–  Prepare leak detector for operation according to its operating instructions.
–  Always hold probe tip under location of suspected leak.
   
If the rate of clicks rises or a howl occurs, depending on model, a leak has been found (see operating instructions for leak detector).
  V87-1455

Detecting leaks in refrigerant circuit using leak detecting systemVAS 6196 or leak detecting systemVAS 6201 > < Leak detection in refrigerant circuit using compressed air or nitrogen