I'm having a low evap refrigerant temp fault every once in a while, this chiller runs at 28 degrees, its in a lead, lag setup with another chiller,only one circuit runs at a time,(balanced run time is enabled), they switch chiller lead once a week. The fault is on the b circuit, maybe once every 2 months.
the low temp setting is 2. I checked the slide valve operation and everything seems to work fine, exv is working properly, I increased the exv response time after the first visit but that didnt help, just wondering if anyone else may have had this problem in the past?
Thanks for any advice.