Originally Posted by
happily1986
I have been monitoring this FCU to look for some more visible tell tale sign of deviating behavior and I am able to determine that whenever the FCU does not produce sufficiently cold air, the frontal bottom half of the A cooling coil is not cold at all (only the top half is cold). Intermittently when the FCU is so called working properly, I don't see such uneven cooling on the coil (top and bottom wise)
Does this still point to an intermittent EEV issue? And how do we check or differentiate whether it is an indoor or outdoor EEV issue then?