motor insulation temp. for most hermetic compressors is class H, or 356 degrees F, for an acceptable thermal life expectancy. Temps. higher than that, the varnish and insulation begin to break down pretty fast.
it may function just fine for another few months or few years, after running without refrigerant cooling for an extended period of time.......just depends on how much you like to gamble i guess. i would want to know the factory megaohm rating compared to what it is after the loss of refrigerant, then decide from there on wether or not to condemn one.
How long has it been running flat? I would be concerned with where and how big the leak is before worrying about amp draw. Compressor probably has already been damaged.
Yup, the leak was from one of the veins off the distributor rubbing up against the reversing valve. And i dont know how long the system was running flat. Im the helper, the tech talked to the home owner while i was outside.
Running a scroll compressor under 50PSI(410A) 20PSI(R22) with no refrigerant can cause arching, and winding degradation, at least according to Alliance. Its on most of their WCR forums and docs, mostly to keep techs from jamming the contactor in and pumping it to the ID without a recovery machine. YMMV