What should I do before storing the unit for an extended period?

First, drain the water collection tray according to the instructions. Then run the appliance on FAN mode for 12 hours in a warm room to dry it and prevent mold. Turn off and unplug the unit, clean the machine, clean and reinstall the air filter, and remove the batteries from the remote control. Store the unit in a cool, dark place away from direct sunshine or extreme heat.