I had a call on a Delfield Supremacy SRR2-S Side by side refrgerator. It's throwing A Error Code 7 Box temp went up to 60*. I work for the public school system in my town. Just to let you know This unit had a compressor go on it. My co-worker previously worked on it. He installed a whole new condensing unit on it. Don't know why he did. I would have changed the compressor, drier, and swept the system, acid test etc. He called me over when he installed new unit and he was having problems. No suction pressure. He had a blob of solder in the line that was blocking flow.
Got that cleaned out. He pulled a vaccum and weighed in the charge of 24 oz of 404A. The unit ran fine. So I went to the call yesterday and the compressor was coming off and on a few times. I felt the top off the compressor, it wasn't that hot to go off on thermal protection. I'm starting to think the board is acting funny in this unit giving false readings? Or still moisture in the sytem still. TXV not a cap tube system. If anybody has a service manual that they can post I would appreciate it.