The table below shows problems and alarms that can occur with Uponor Smatrix Base/Base PRO and describes solutions. A common
cause of a problem though may be due to wrongly installed loops or mixed up thermostats.
In case of mixed up thermostats in a Uponor Smatrix Base PRO system, use the room check function, see section 14.7 System settings for
more information.
Problem Indication Probable cause Solutions
Fluctuating floor
temperature
Floor temperature is changing abnormally
between hot and cold in heating mode
Supply water temperature is too high Check boiler or shunt
If an interface is connected to the system
(Base PRO only), run supply diagnostic
test
Room temperature does not match
setpoint on thermostat, and actuators shut
on/off on a fixed interval
Heating fall back function is activated
due to lost communication with
thermostat
Check the connection of the room
thermostat and make sure that the wiring
is OK
Check the interface (if installed) for an
error indicating that a thermostat has lost
connection (Base PRO only)
Reconnect if the connection is lost
Room temperature does not match
setpoint on thermostat
The thermostat is placed in direct
sunlight or close to other heat sources
Check placement of the thermostat
according to installation instructions and
change location if needed
The thermostat is placed in the wrong
room.
Check the placement of the thermostats
and change rooms if needed.
If an interface is available the room
check function can be used. See section
14.7 Settings > Room check for more
information.
The room is too cold
(or too warm in
cooling mode)
Press – or + buttons to display the
temperature setpoint on the thermostat
The thermostat setting is too low Change the temperature setpoint
Use maximum and minimum floor
temperature limitation settings to
protect the system from consequences of
unreasonable temperature settings (only if
floor temperature sensor is installed)
The temperature displayed on the
thermostat changes after the thermostat
is moved
The thermostat may be influenced by
an external heat source
Change location of the thermostat
See installation report and controller/
channel numbering on the thermostat label
The thermostats of individual rooms
are incorrectly registered
Place the thermostat in the correct room or
change the thermostat registration in the
controller
White indicator cannot be seen in window
of an actuator
An actuator does not open Replace the actuator
Contact the installer
Setpoint temperature displayed in the
room information menu is lower than the
temperature set on the thermostat
Incorrect minimum/maximum
limitation
Change the minimum/maximum limitation
in the interface (if installed, Base PRO
only)
ECO in room information menu ECO mode Change ECO profile or assign another
profile to the room in the interface (if
installed, Base PRO only)
Reduce the ECO setback value for the
thermostat
Supply temperature from the integrated
heat pump (if installed, Base PRO only)
is too low after deactivating heat pump
integration in the interface
Heat pump integration is still activated
in the connected heat pump
Deactivate heat pump integration in the
heat pump (see documentation for the
heat pump)
Disconnect the wires between the heat
pump integration connectors on the
controller and the heat pump
16 Troubleshooting
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