The table below shows problems and alarms that can occur with the Uponor Control System and describes solutions.
Problem
Indication
Causes
Solutions
Uneven fl oor
temperature
Floor temperature is changing
abnormally between hot and cold in
heating mode
Supply water temperature
too high
Check boiler or shunt
If Interface I-75/76 is connected to
the system, run Supply Diagnostic test
Room too cold (or too
warm in cooling mode)
Press + or – key to display the
temperature set point on the
thermostat
Temperature setpoint is displayed
on Interface I-75/76 in room
information menu
Thermostat setting too low
Change temperature set point
Use maximum and minimum settings
to protect system from consequences
of unreasonable temperature settings
Temperature displayed on
thermostat drops after thermostat
is moved
Thermostat may be
infl uenced by external heat
source
Change location of thermostat
See installation report and
controller/channel numbering
under thermostat cover
Force thermostat to transmit and
check if the corresponding LEDs
fl ash
Thermostats of individual
rooms are incorrectly
registered
Place thermostat in correct room or
change thermostat registration in
Controller C-55/56
White indicator cannot be seen in
indicator window of actuator
Actuator does not open
Replace actuator
Contact installer
Set point temperature displayed
in room information menu is lower
than temperature set on thermostat
Incorrect minimum/
maximum limitation
Change minimum/maximum limitation
ECO in room information menu
ECO mode
Change ECO profi le or assign another
profi le to room
Cancel rest of ECO period by pressing
a thermostat key
Room too warm
(or too cold in cooling
mode)
Corresponding loop is warm even
after a long period without heat call
Actuator does not close
Contact installer
Check that actuator is correctly
installed
Replace the actuator
Floor is cold
No heat demand from underfl oor
heating system
Room is heated by another heat
source
Room temperature OK but
fl oor is cold
All rooms are cold (or
warm in cooling mode)
Holiday Mode
Icon displayed in Interface
I-75/76
Cancel Holiday mode
ECO mode for rooms in room
information menu
ECO mode
Change ECO profi le or assign another
profi le to room
Cancel rest of ECO period by pressing
all thermostat keys
Check system information and
operation mode of Interface
I-75/76
System in cooling (heating)
mode
Correct signal from external device
needed
11. Problems and recommended solutions
4 3
U P O N O R C O N T R O L S Y S T E M – 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
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