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Problems with refrigerant circuit > < Tracing leaks in refrigerant circuit with leak detection system VAS 6201

A2

Establishing leaks by way of vacuum test with air conditioner service station or nitrogen pressure test
Establishing leaks by way of vacuum test with air conditioner service station or nitrogen pressure test
Vehicles with high-voltage system (hybrid vehicles)
For all work on vehicles with a high-voltage system, note the additional warning instructions for working on such vehicles → Chapter „Warning instructions when working on vehicles with high-voltage system“ and → Electrical system; Rep. gr.93.
All vehicles
–  Switch off ignition.
t  Establishing leaks by way of vacuum test with air conditioner service station or nitrogen pressure test → Chapter „Evacuating refrigerant circuit with air conditioner service station“
  Note
t  Minor refrigerant circuit leaks (loss amounting to less than 100 g of refrigerant per year) can generally not be established by way of the vacuum test or nitrogen pressure test. The quantity of air ingressing or nitrogen escaping is not sufficient to be audible.
t  Depending on the ambient conditions (ambient noise, leakage location etc.), it may also not always be possible to establish refrigerant circuit leaks involving a loss of more than 100 g of refrigerant per year using the vacuum or nitrogen pressure test. The amount of air ingressing or nitrogen escaping may not be sufficient to produce a noise permitting detection of the fault location.
t  Depending on the ambient conditions, it may be possible to detect major refrigerant circuit leaks (e.g. caused by flying stones at the condenser, loss of refrigerant more than 100 g per day) from the noise occurring at the fault location during the vacuum or nitrogen pressure test for example → Chapter „Evacuating refrigerant circuit with air conditioner service station“.
   

Problems with refrigerant circuit > < Tracing leaks in refrigerant circuit with leak detection system VAS 6201