I have a 110v AC refrigeration
system (Copeland) R134a, with 4 cold plates. I had problems with the old unit when it suddenly started to overheat the compressor
and shut down. The plates and charging
system were normal and the box would get down to -15 which is in the range it was designed before it started failing. I replaced the unit with a direct replacement and today when I installed it, it started doing the same thing.
It has a sporland expansion valve and I have a warm intake line and cold on the backside of the expansion valve so I am assuming that it is working ok. Feeling the cold plates on the back side of the valve, 1 and 2 and 4 are chilling nicely while number 3 feels somewhat warmer.
The gauges read 25psi on the suction and 175 on the high side with the ambient temp around 90 degrees f. I have looked all over for an answer for what it should be and the results are all over the map.
Any idea what would cause the compressor
to overheat? One last thing, when I was putting it in, it appeared to have spilled some oil
(1-2 oz) so I call my friend who was an AC tech and he said it was nothing to worry about as the refrigerant has oil
Right now, I am letting it cool off and tomorrow, I will put 2 oz of oil into the system and try it again. Also, do you hold the can right side up or up side down when you charge the system.
types out there that can help me troubleshoot this system....Please