Hello again...
Here is the history of my problem...I have been going through the 320 manual but need some direction. I put this machine in service two weeks ago. Pull down time to zero degrees F was about an hour or so. That temperature was maintained until I checked the machine the next week and temperature was holding. I loaded it and it was lights out when I visited again a week later (last Monday). I asked around and everything was fine last Saturday. Some strong thunderstorms rolled through on Sunday and everything was warm and thawed by Monday. ..machine was at ambient temperature. Question...could the storms and an electrical surge have tripped something in the machine? Any circuit breakers to check? I checked the temperature setting using the control module and it still read 0 degrees F. I understand from the manual that the frozen setting must be designated on the food control board attached to the refrigeration unit so that is the default if the FCB stops communication with a second control board in the machine. I did not check this due to ignorance and I assumed the setting was correct because the machine was cooling. Question: Could a freezing temperature have been maintained even if the setting on the FCB was wrong with the warm-up developing later and not staying frozen because of an improper setting on the FCB?
I ramble. I am going back to try to figure out the problem on Saturday and will continue trying to make sense of the manual. Any insights and ideas you might provide would be appreciated. I am hoping it is something simple and not just bad luck for a major refrigeration problem to develop so soon after acquiring a clean and apparently well functioning (initially) machine.
Regards,
Vic