Hello, I am wondering what the driving factors are for a York YT Chiller (VSD-YTG3A4E1-CNJ) VFD to slow down? With very low load on the chiller, the compressor VFD output remains at 60 HZ. When load continues to decrease, the chiller shuts off on low leaving water ~5 times and eventually goes into alarm.
It seems like the compressor should begin to slow down for better load management as well as kw/ton performance?
When the chiller is half or more loaded, I do see the compressor slow down when condensor water is cold (mid-60's). However in low load situations, it doesn't seem to matter where I put the condensor water to get a VFD reaction. I notice kw/ton get worse with warmer condensor temps as expected.
Any feedback would be much appreciated.