I have a Multiplus II 120/3K in an off grid cabin. Over the weekend I forgot to turn off the heat pump when I left and the load ran the battery pack down overnight. The inverter shut down around 5 AM and after a couple of failed restarts, it remained offline all day.
As I understand it, at this point the inverter would require a manual reset to restart. But that is not what happened. I had a friend go to the cabin and pull the AC disconnect on the box outside above the heat pump compressor. Magically, the inverter restarted on its own.
Looking through the documentation I only saw the reference to manually restarting the inverter after 3 failed attempts. So I was curious to know how this unit knew that the heat pump circuit was disconnected and restarted on its own. I have no problem with that, I’m glad it did. Thank you.