LEAK DETECTION
Leakage control - an absolute must
LEAKAGE CONTROL – AN ABSOLUTE MUST
The utopia of a maintenance-free A/C system has been abandoned long ago. These days, A/C experts accept the fact that refrigerant losses occur with virtually every system. These losses do not always result from torn ducting or damages through accidents. Even totally intact systems lose some refrigerant – through the ducting and piping system, screw connections, sealing rings, etc. Such losses particularly affect modern systems containing far less refrigerant than former system generations.
The law forbids recharging defective A/C systems – after all, R134a is regarded as an environmental hazard and climate killer and no matter which refrigerant is used in the A/C, the filling amount should be correct. Regular leakage checks are in the interest of the vehicle owner to prevent compressor damage.
ELECTRONIC LEAK DETECTION
Electronic leak detectors are versatile and can be used on a variety of vehicles, including cars, trucks, and even hybrid or electric vehicles with specialized A/C systems. This makes them a useful tool. The investment in electronic leak detection equipment saves money in the long run by reducing labor time. It is non-invasive, meaning it doesn't require the removal or disassembly of parts to inspect for leaks.
NITROGEN LEAK DETECTION
This method involves the production of positive pressure through nitrogen or negative pressure through vacuum by the A/C service unit. Leak detection through differential pressure is mainly suitable for the initial testing of strongly leaking or even empty systems. It only indicates that the system is leaking – not where the leak is. Testing is only possible with A/C service units that automatically stop when it is impossible to generate vacuum (e.g. all WAECO ASC service units). If the process continues without fault warning, you can be certain that the system has no leak and may be charged with refrigerant. The requirements of the Chemicals Climate Protection Ordinance are met.
UV LEAK DETECTION – ALWAYS WITH THE MATCHING UV ADDITIVE!
A PAG and PAO mixture do not form a consistent oil film. As PAG is heavier, it settles below the PAOs. A phase separation is clearly visible in static condition. During the start-up operation of the A/C system inconsistencies in the mixture can occur and cause damage to the compressor. Given the clear phase separation of the two oils, there can be no such thing as a universal UV additive. The UV-additive is contained in a carrier oil. If the different oils do not mix, the UV additive will not mix 100% with the two oils either. The consequence is that it “sags through”. If the oil and the UV additive are a perfect match, the UV additive will form a stable and uniform blend with the compressor oil. Conclusion: Always mix the right oil with the right UV additive.
