Description of the
Controller operating normally.
0 = Auto
1 = Heat
Controller can operate in heating mode only;
cooling sequence disabled.
2 = Morning Warmup Boost heating.
3 = Cool
Controller can operate in cooling mode only;
heating sequence disabled.
4 = Night Purge
Precool room with fan (no cooling coil) (only
FNC10, FNC12 with outside air damper)
5 = Precool
Precool the room with fan, cooling coil and
outside air damper.
6 = Off
The temperature control is disabled.
The remaining functions are active.
Communications are operating as normal.
7 = Test *)
All functions disabled.
Motorized valve and damper actuators
Outputs can be overridden via KNX bus.
Emergency heating (always enabled).
8 = Emergency Heat
9 = Fan only
Rapid ventilation (formerly Air flush)
Max. ventilation using outside air (FNC10,
FNC12 with outside air damper only).
10 = Freecool
• During Economy. Precool room using
• During Comfort normal mode.
*) Exit from Test mode (7) is only possible with sequence Off (6) + normal mode (0).
Triggering the special functions by the building automation and control system can be
disabled in each room controller via tool.
Go to the Functions menu for the disable feature.
See parameters in the last column of the above table.
Boost heating (Morning Warmup, 2)
This function is used to raise the temperature in a room as quickly as possible to the
Precomfort heating setpoint at the end of the night setback period.
Objective: Preheat the room for heating.
RXB (KNX) application library
General and central functions
cooling coil (low energy tariffs).
FNC Description of functions for FC-10, FC-11, FC-12
28 Feb 2009