I have a question about a unit I was working on.
I responded to a call about a unit that was making a smooshing noise every 5 min or so while the unit was running. I get there and first thought was internal relief valve. I throw some guages on...
Low side 45 psi (10 degrees)
High side 330 psi (125 degrees).
Cap tube with subcooling of 50 degrees?? Liquid line was 75 degrees.
Every time the swooshing noise starts the High side opens the relief at 330 psi it and closes at about 250ish.
The part I dont understand. There is a suction dryer installed. The first time I took temp split across the drier I had 14 degrees differance. I assumed this would cause a restriction and make refrigerant back up in the condensor. A few minutes later I checked again and it was only a 1.5 degree diff across the suction dryer.
This is where I am stuck. Any thoughts?