It is possible that you have good water pressure to the engine, Good engine temps and you get the alarm. I had a similar situation happen to me and it was the water flow going to the compressor that had been partially blocked. I kept getting an alarm with a fault flashing on my Nexsyslink gauge and after some digging around I found the water inlet to the compressor screen plugged nearly solid with wood particles. May not be what you are seeing but its worth a look. Chris CoupelPaulina, La.Chris CoupelPaulina, La.