Alright I am at the point I am going to rewire this unit, and wanted to see if anybody has run into the same problem.
5 year old 40ton Aaon unit.
4 ten ton scrolls and 4 stages of cooling
6 condenser fans, 3 for the first 2 stages and 3 for the last 2 stages.
No VCM just fired from DDC system with Y1-Y4 based on DAT set point.
I get intermittent head pressure trips on the first 2 stages only. I have verified with gauges that they trip @ rated setting. I can run this thing front to back w/o any issues while on site, 2-20 days later they are tripped again. When I am there the head never goes above 200#. I have bypassed the cheap snap disk fan cycles and the time delays on the compressors. What is weird is on the wiring diagram the condenser fan motor contactor gets fired at the same time the compressors do.