Hey guys (and gals?),

I am new to posting here. I have spent several sleepless nights reading some of the threads though. I appreciate the time you take to help others.

I have a small walk-in freezer box, approx. 16' x 18', with a small Copeland compressor. Recently, we have had trouble with the unit tripping on low oil pressure. When we put our gauges on it, we have plenty of pressure, about 35psi over crankcase. So we replaced the oil pressure switch. But we still get occassional nuisance trips.

I believe the unit trips when coming out of defrost. One technician suggested that it was a problem of the oil being thinned by refrigerant flooding back to the compressor. Can anyone explain the dynamics of this problem? What is the proper fix for such a problem?

Thanks for your help!

Regards,

Steve