I'm looking for help on a Trane CVHF910 Chiller that will run for about 20 minutes and trip. Two faults reoccurs; Soft Start Relay Open, and MPL fault. A year ago I fixed the MPL fault by replacing the HPC. I have read the Service Bulletin: Solid State Starter Logic Module (2U2) Failures. But I'm still not convinced the 2U2 module is at fault.