I have experienced a Cpl shutdowns with mine. Mine seemed to all be resistance related. If I open the valve on my scba too fast, even if the gx pressure is above the scba when I open the valve it will shut off the compressor. I built a one way valve inline so I could just open my scba valve up, start the gx and the one way valve would open when pressures equalized. It worked fine once and the the next time shut the compressor down when that one way opened up. Trash canned that valve and now just open manually slowly and it works fine. The auto shut off on these things is very sensitive/finicky in my experience.
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