A visual inspection should be performed to check for dye and/or oil (some manufacturers put UV dye in A/C systems from the factory).
Check all AC components including the AC compressor front seal & evaporator drain tube. If the refrigerant leak is not evident, verify that dye is in the system or add dye (one method is with a dye injector).
You may then use an ultraviolet light (UV Light) also called a black light, to inspect all AC components.
Check the entire system with an electronic leak detector, the evaporator can be checked at the evaporator drain tube.
After the repair has been made, hook up an AC vacuum pump, and let the system stay in a vacuum
for at least fifteen minutes. Turn the vacuum pump off and watch the AC gauge to see if the vacuum holds. If a loss of vacuum is noted, this could indicate a large leak, possibly from an o-ring on a component that was just worked on. Tip when adding refrigerant oil; After adding oil to the system near or in the compressor, turn the compressor by hand ten revolutions to prevent damage to the compressor (oil cannot be compressed). Warnings; 1. Do not charge refrigerant into the high side 2. Do not over-charge the system, damage to the compressor can occur. 3. Always wear safety glasses when working on air conditioning systems, even with the freon removed oil can spray from an open AC line caused by trapped freon suddenly passing through a restriction.
You will need an AC Gauge Set, an Electronic Refrigerant Leak Detector, an AC vacuum pump, a UV Light and a thermometer.
http://www.denlorstools.com/home/dt1/page_6846/checking_for_freon_leaks_exclusive_tech_article.html
Article Source: http://EzineArticles.com/?expert=Dennis_Bandy
Tidak ada komentar:
Posting Komentar