Hey guys and gals new to the site, I was hoping I can get some insight on a Trane Air Cooled Chiller. M#CGAM052A202..... S#U10F16517, unit is 410a refrigerant. Has a CH530 controller on it. Unit has 4 scroll compressors, EXV's, and four condenser fan motors. Unit is fairly new as you can see from the serial # . OK so whats happening is the chiller goes to a low suction temperature alarm kind of randomly during the week. And from what I can see on the alarm history it's always the the Lag circuit that goes into alarm. So I'm getting these alarms on both circuit 1 and circuit2. Units running good as far as refrigerant pressures and temps, superheat and sun cooling are pretty much dead on. Whats throwing me off is its only on the circuit thats the lagging circuit. Anyways guys I hope this is enough information to try and get some insight on the chiller. BTW the suction temperature sensor was changed on circuit 2 a couple of day ago by a co-worker. Any information would be greatly appreciated .