I had someone ask if I knew what this alarm was that showed up on the digital display , it was "failure single MTP " . Iwas not there so I can't give any info he only sent a picture of the controller the copeland number was 043-0105-rev 1. I could not find anything on line yet and text support was not helpfull at all . If anyone has a very good text support number or ever saw this I please replay😩