Hi all. Need some advise from this wonderful group. We have an Expanda 14 pop top with a Heron 2.2 split system aircon. We live in Brisbane and went to Maroochydore to try and escape the heat but it followed us. OK we have aircon lets try it, closed everything we could and turned it on. After a couple of hours the inside unit froze up. It was very humid and by the sea. What are the best settings to avoid the ice up, fast fan, slow fan, lower temp, go for a swim.