Conclusion
Keep in mind that the compressor can cause a vacuum inside the system if
there is a restriction in the system. That means it can suck air and
moisture inside under some conditions. It will pull these contaminants in
through the same space where refrigerant and refrigerant oil has leaked
out.
Conclusion
What could the air conditioning problem and it's cause have been at the
beginning of this chapter? The operator was in a hurry, but you were able to
start your troubleshooting with the answers he gave you. Problems your
inspection may have turned up are a very low refrigerant charge, a contami-
nated system or defective compressor. Those are not quick fix jobs.
On the other hand, you might have found enough debris on the condenser fin
surface to boost high side pressures to an abnormal level during the hottest
TM
or high pressure switch would cut out from
part of the day. So the Trinary
high pressure--but reset itself. You cleaned the condenser, added a half pound
of refrigerant and AC system pressures and function returned to normal.
Service and repair took a half hour. But there was no way to tell without using
your knowledge and experience. By now you are pretty familiar with AC
system problems, the reasons for some of them, troubleshooting and repair. In
Chapter 9 we will describe complete system purging, evacuation, flushing and
recharging.