The table below shows problems and alarms that can occur with Uponor Smatrix Space and describes solutions.
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
Room temperature does not match
setpoint on thermostat, and the actuator
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
Check batteries in room thermostat
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 heating
sources
Check placement of the thermostat
according to installation instructions and
change location if needed
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 incorrect
Change the temperature setpoint
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
White indicator cannot be seen in window
of the actuator
The actuator does not open
Replace the actuator
Contact the installer
ECO icon in thermostat display (T-168
only)
ECO mode
Change ECO profile or assign another
profile to the room
Reduce the ECO setback value for the
thermostat
Check the chiller (boiler) information and
operation mode of the digital thermostat
The system is in cooling (heating)
mode
Correct signal from external device needed
The room is too
warm
(or too cold in
cooling mode)
The loop is warm even after a long period
without heat call
The actuator does not close
Contact the installer
Check that the actuator is correctly
installed
Replace the actuator
The floor is cold
The room temperature OK but the floor
is cold
No heat demand from the underfloor
heating system
The room is heated by another heat
source
No communication
Communication error
Registration lost
Contact the installer
Register the thermostat again
12 Troubleshooting
UK
CZ
DE
DK
EE
ES
FI
FR
HR
HU
IT
LT
LV
NL
NO
PL
PT
RO
RU
SE
SK
3 3
U P O N O R S M AT R I X S PA C E / S PA C E P L U S · I N S TA L L AT I O N A N D O P E R AT I O N M A N U A L
