Recently a HVAC technician installed a replacement scroll compressor. When he energized the system the compressor trip the main breaker within about 4 minutes.

He left (went out of state) and another technician found that the compressor oil had been pumped out (up to the new drier/filter).

I noticed before the first technician installed it that it was transported and carried in a horizontal position.

So my questions are:

How long after being in a horizontal position should a scroll compressor be left without power before being powered up?

Besides being carried/transported in a horizontal position, what else would cause pumpout or pushout of the compressor oil?

Could pressure testing or purging with nitrogen push out any oil? During charging with ***** can that push out any oil?

During running with ***** can that push out any big quantity of oil?

Can a typical good brand of filter/drier be expected to block most of the oil from going upstream?

Thanks,