When replacing component parts in the air conditioning system and when returning parts for warranty inspection please note the following at all times: With immediate effect a control unit log and a printout/log of the refrigerant quantity extracted from and poured into the air conditioning service unit must be included with the component parts.
To make printing out easier, the diagnostic device has the menu item "Control unit log". In this menu item, the following data is compiled automatically and can then be printed out:
Control units
Vehicle data
Customer complaint (to be filled out by workshop personnel)
Fault memory
Ambient data
Quick test
If air conditioning components carrying refrigerant are leaking or replaced, the following must be additionally taken into consideration when returning parts to ensure the warranty inspection procedure is simple and professional:
Component parts in the air conditioning system that were replaced because of leaks, are to be clearly marked at the leaky points with a wiping resistant marker.
The extracted quantity of refrigerant must always be documented by means of a current printout/log for the air conditioning service unit.
The technician's findings report must contain a concise explanation of how the leakage was located (specification of aids: e.g. leak detection spray, forming gas, nitrogen etc.). See Warranty manual, chapter WR 0405060, Technician's findings.
A leak test may only be performed in line with the available WIS documentation.
The use of contrast agents is no longer permissible in most cases (e.g. Europe, see Directive 2006/40/EC "Emissions from air conditioning systems in motor vehicles").
All component parts from the refrigerant circuit (refrigerant compressor, expansion valve, lines, condenser) which are sent in for warranty inspection must be sealed with suitable stop plugs.
To ensure correct inspection of the component, it is important to complete the field "Customer complaint (remark concerning damage case)". A detailed technician's findings report as well as any other relevant information or freeze frame data must be included.