@Hogboon Ive got an LG heat pump as well, same controller. I was using the AI function which I believe uses weather compensation to optimise flow temperature, leaving it on 24 hours a day. Seemed to work at first but then temperatures in the house began to fluctuate and now I have it timed via a thermostat. Regarding the controller - if you want to access the settings, you need to go to the settings icon, hold down the up arrow, then type in the software version (4 digits - should be visible on the controller). This takes you into the settings and near the bottom of the list is a log of the last 50 or so boiler functions - I think if there were any errors you would see them in this list.