One of the techs looked @ an RTAC chiller today it was a binding issue with a sensor. He mentioned this chiller used what he thought was a Flat Plate style evap coil. I said its probably a remoted evap and what you thought was a flat plate under the insulation was probably an accumlator.
Anybody great with the Trane numbers
M# RTAC 1554 UDON UAFN NINX IDDC NNON NION NOEX