There are five fault conditions allowed for in the controller. These are:

Fire: The smoke detector has operated.

Low Flow For Elements: The air flow over the elements is not sufficient to stop them from over heating.

Low Flow For Extract: The extraction is not sufficient.

Low Flow For Occupancy: The make up air is not sufficient for the given occupancy.

Element Over Temperature: The element safety cut off in the element bank has operated, and shut down the elements.

If one of the fault screens is showing, the system will not be running. The problem causing the fault needs to be rectified. Once this is done press the enter key (key 8), and the default screen will be displayed.