So, I was sub-contracted by a guy who installs heat pumps but can't hook them up, set them up, or service them. There's lots of these guys out there. At least they're subbing out rather than attempting themselves.
I went to a year old install and found that the heat pump ran short cycles, didn't provide heat, and as the homeowner put it,"released condensation from the condensor periodically".
I found that the wrong piston was installed and that the blower speed was set too high. I also found that their furnace blower was set to run for 3, 30 minute periods in the morning which made them think it was another heat cycle. All is well now except for this "release of condensation" problem. I haven't been there for a few weeks but I was happy with the sc, sh, and delta T. I'm sorry but I don't remember the specifics. I do remember that the return was brought in through the right side of furnace which I don't like, especially since it is trying to move 1600 cfm.
All I can think of, is that it is a defrost cycle but it was 50 degrees outside. Customer said he was working outside and the unit ran for about 10 minutes, shut off, about 10 seconds later it "released a cloud of condensation" and sounded like it was "bogging" or trying to get going again, and then did start up again for 5 minutes and finished heat cycle.