I'm a beginner tech. Working with Carrier 38 TE 2.5 ton split system (R-22). It wasn't in use 2 years. Minimum of freon left in. Compressor was working with a little vacuum on suction. I've pressurized the system with nitrogen - ok. Stable presure. After that I've avacuated it until 25 in Hg. Holding fine. And then I've charged the system with liquid freon through high side port by eye (I don't have a charging scale). The system pressure now is 70 psig. When I turn the system on compressor starts, but in 3 sec it stops. It repeates in 3 min.
Any ideas, please.