Danfoss Heating
9
Button 
Lock
Indicates that Button Lock has been activated to 
avoid unintentional setting changes.  To activate 
buttons while button lock is active press the OK 
button for 5 seconds.  The Button Lock setting is 
found in the Installer Menu.
Heat 
Calling
When the current room temperature is below the 
required room set temperature the TPOne will call 
for heating from the connected heat source.  This is 
indicated by the Heat Calling icon.
Hot
Water
Calling
Where the TPOne-S has been set up for control
of domestic hot water the TPOne will call for
hot water heating according to the user set
schedule. This is indicated by the Hot Water
Calling icon.
The TPOne-S is connected by radio signal to a 
receiver.  The Radio Frequency icon will be displayed 
to confirm that this connection is active and that the 
TPOne-S is controlling the heating.
If connection is lost the icon will go off and a warning 
will be shown at the top of the display.
Important Note: Ensure that there are no large metal 
objects, such as boiler cases, other large appliances 
or mirrors in line of sight between the transmitter 
and receiver as these will prevent communication 
between the TPOne-S  and receiver.
Display
Info & Settings Status Icons
Dates & 
Warnings
21
.5
°
16:35 Mon
NOTE: 
TPOne monitors several conditions and will provide warning or 
information messages when necessary.  Details on these can be 
found on pages 26-29.