My used Tranquility 27 was installed about a year ago. I noticed last month that it was staying on longer than usual, so I had a repair person come out to fix it, who found that the R410A was low and charged me $330 to refill it. We are running an open-loop system from a well. Last week I could hear the compressor and water pipes kicking off about 6 minutes after it turned on; Investigating today we found (1.) Coolant pressures the same level as when it was filled; ie no coolant leaks. (2.) The thermostat and controller are all calling for heat even after it shuts down;i.e. the G, Y1, Y2 are all on. After it shuts down the status on the controller changes from solid green to flashing green. The status on the interface board changes from flashing 9 to flashing 20. The compressor shuts down, the units power draw drops from 16 Amps to < 1 Amp. Any thoughts on what to look for in debugging this unit? Thanks, Robert

What did the service company that charged it up say?

you had a fp1 fault and it was not low on charge. The tech saw low suction pressure and added refrigerant to bring it up. The unit has contaminated wet oil and it clogged a screen downstream of the TXV. I have more than 40 of these installed and this is why I bailed on that brand. They still have that issue. remove that screen it will take about 8 hours to do it right.

......or the water flow was inadequate......or a number of other things. Just sayin

Right there are quite a few possibilities but I see the excact same problems common to the brand and model and know these units are quite tolerant of low waterflow but intolerant of low refrigerant flow thru the TXV.

Had a few act up myself.......just rather verify waterflow before opening ref side.

I use PT ports and do not attach manifold guages unless I have too. Unfortunatly I almost always have to.

Posted By Brian466 on 08 Apr 2013 09:24 PM
I use PT ports and do not attach manifold guages unless I have too. Unfortunatly I almost always have to.

yep I get it