Drainage bypass to hose not working

I have a de-humidifier that drains automatically to a floor drain. A month ago I shut it off for something and after I turned it back on it automatically shuts off once the water container fills. In other words, it apparently isn't draining to the floor drain anymore. I can't get inside the casing to see what's up, the hose is free of debris and well connected to the connecting point. Any suggestions?