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I just finished installing my first mini split system and until now things have been a breeze. It's a pre charged unit. Hooked up lines pulled a vacuum, waited to check for leaks, released some coolant, waited some more to check for leaks, released the rest, more leak checks (there never were any), then disconnected the vacuum pump. When I disconnected the pump from the service port refrigerant and oil sprayed down my arm, a lot more than the little puff I was expecting. Is that normal/acceptable? What should be my next step to verify that things are ok?