Have noticed that I have 1 of my 3 AC units that the compressor only has been shutting off after about 15 minutes blower fan and upper fan outside will stay on.. It will then come back on in about 10 ...
It sounds like the internal thermal overload inside the compressor. BTW: The inside and outside fans are on either end of a double shaft motor. If one's turning, the other end better be!
If it was mine, I'd turn it off until it was fixed.