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Control functions
Table 2-13 Controller state overview.
Controller
state Description Priority Indications in room units with display LED indication
in room units
without display
Off This state is typically used for when
the room is not in use for an
extended period of time, for
example, during holidays or long
weekends.
In this state, the controller only
provides heating control for frost
protection, which keeps the room
temperature above 8 °C. Energy saving
and frost
protection
✓ OFF indication is shown.
✓ HEAT indication is shown when the
demand is greater than zero.
✓ Off
Unoccupied This state is typically used for when
the room is not in use for an
extended period of time, for
example, during holidays or long
weekends. Energy saving
✓ OFF indication is shown.
✓ HEAT or COOL indication is shown
when the demand is greater than zero.
✓ The room temperature, setpoint,
setpoint adjustment, or CO
2
level is
shown (according to the current room
unit configuration, see section
3.7.3 ).
✓ Off
Standby This state is typically used for when
the room is not in use, temporarily
or for shorter periods of time, such
as during evenings, nights, or
weekends. Energy saving
✓ STANDBY indication is shown.
✓ HEAT or COOL indication is shown
when the demand is greater than zero.
✓ The room temperature, setpoint,
setpoint adjustment, or CO
2
level is
shown (according to the current room
unit configuration, see section
3.7.3 ).
✓ Blinking
Occupied This state is typically used for when
the room is in use. Comfort
✓ Occupancy indication is shown.
✓ HEAT or COOL indication is shown
when the demand is greater than zero.
✓ The room temperature, setpoint,
setpoint adjustment, or CO
2
level is
shown (according to the current room
unit configuration, see section
3.7.3 ).
✓ Solid
Bypass This state is typically used for when
the room is in use, and when a
temporary maximum flow of fresh
air is needed. For example, when
the room needs an extra boost of
fresh air prior to a scheduled
meeting that is going to fill up the
room with a large amount of people,
or due to high a CO
2
level.
The increase in airflow is achieved
by using the forced ventilation func-
tion, see section
2.7 .
Comfort and
improved air
quality
✓ Occupancy indication is shown.
✓ HEAT or COOL indication is shown
when the demand is greater than zero.
✓ Forced ventilation indication is shown
when forced ventilation is active.
✓ The room temperature, setpoint,
setpoint adjustment, or CO
2
level is
shown (according to the current room
unit configuration, see section
3.7.3 ).
✓ Blinking
slowly
2.4.1 Control behaviour
This section describes the control behaviour for the different controller states when the controller regulates
based on heating and cooling demand.
Off
In this state, the controller does not regulate based on the configured occupied heating and cooling setpoints.
Instead, the controller only provides heating control based on the configured frost protection setpoint.
Setpoint adjustment is not active in this controller state.
Active setpoint: The configured frost protection setpoint.
Figure 2-19 illustrates the control behaviour when no maximum or minimum limits are set for the output
signal.
Regio Eedo manual, Rev. D 23