Component Tests and General Diagnostics

64 50 ... - Leak testing with ultraviolet additives (UV additives) (BMW leak-testing case)





Important!
It is absolutely essential to read and comply with the equipment manufacturer's instructions for use provided in the equipment case!
Read and comply with the instructions for use provided with the special tool particularly with regard to accident prevention, health protection and environmental protection.
Use only BMW-approved UV-additives (e.g. TRACER).
Only the basic procedure is described in the following!





Warning!
Avoid contact with refrigerant.
Follow safety precautions when handling refrigerant Instructions for Handling Refrigerant R 134a.

Important!
UV lamp gets very hot in the radiation area!
Do not use the UV lamp without the filter glass.
Eyes and skin will suffer damage if the UV lamp is used without the filter glass.
When using the UV lamp, wear the protective goggles provided in the case.





Note:
- Fill the hose system of the hand pump completely with UV additive PRIOR to use
- Use the UV additive exclusively for BMW-approved refrigerant oils
- Do not operate the A/C system while the hand pump is connected or in use
- The A/C system must always be filled with an adequate amount of refrigerant to enable the leak-detecting agent to be properly distributed





Necessary preliminary tasks:
Before actually testing for leaks, check the entire refrigerant circuit using the UV leak-detecting lamp to ensure that no UV additive is already in the area of the refrigerant circuit.
If already illuminated areas are found, carefully clean the area in question with the cleaning agent contained in the case.





On initial use:
Connect hand pump (1) to additive cartridge (2) and hose piece (3).





On initial use:
Attach vent valve (1) to quick-connect coupling (2).
Turn handle (3) on hand pump to advance the plunger until a small amount of UV additive emerges. This vents the hose system.

Important!
The entire hand pump with hose system must not be disassembled again once the filling work has been completed.





Attach quick-connect coupling (1) to low-pressure connection (2) of A/C system.
Turn handle on hand pump (3) until the required amount of UV additive is added.
The quantity of UV additive to be added is dependent on the amount of refrigerant in the refrigerant circuit A/C System, Refrigerant Amounts:
- A/C systems with refrigerant filling up to 900 g: one graduation mark (4) on additive cartridge
- A/C systems with refrigerant filling in excess of 900 g: two graduation marks (4) on additive cartridge

Note:
After filling, remove quick-connect coupling (1) and if necessary use the cleaning agent contained in the special tool case to clean up the UV additive.





Further tasks:
- Start engine.
- Run A/C system at highest setting for 5-10 minutes in order to ensure adequate distribution of dye in the system
- Switch off engine
- Check all A/C system components for possible leaks
- Possible leaks show up in luminous green





Complete accompanying information label (1) with the relevant data and attach in an easily visible position next to the filling capacity information label (2).