I have a Trane two stage cooling & with an economizer 15 ton unit that’s isn’t wanting to cool at times. Pressures are good amps are good when everything runs. When it is in cooling mode the indoor blower stays running and the compressor and out door fans will start but after a 4 or 5 seconds the compressor and outdoor fans shut off. But when I go into test mode and let it run for a minute the unit cycles through normally. Basically when I run it in test mode it kind of resets itself and works for a day or two. Any ideas on what I might be dealing with guys?