Installation manual

14 Underfloor Heating
5.5 List of possible failures and solutions
1
: To find out if a problem is caused by the supply system or the control system: loosen the actuators from the manifold, wait
some minutes and check if the flow pipe of the floor heating loop warms up. After some more minutes, the return pipe also
should warm up. If the pipes do not warm up, the trouble lies in the warm water supply, if the loops warm up, the cause
could be the room control system.
2
: Supply system defect: no warm water in manifold. Check boiler and circulation pump.
6. Disposal of the product
The Uponor Control System is made up of various recyclable components. Uponor would be grateful if you could sort out these
components (batteries, plastics, electric or electronic parts) and dispose of them at a suitable recycling centre.
Failure Indication Causes Solutions Note
room too cold (or
too warm in
Cooling mode)
1
■ press + or – key to display the
temperature set point on the
thermostat
■ the temperature set point is also
displayed in the room information
menu
thermostat setting
too low
change temperature set point
use max and min
limitation to protect
system from
consequences of
unreasonable
temperature settings
temperature displayed on the
thermostat drops after a while when
the thermostat is moved
thermostat e.g.
influenced by a heat
source
change the location of the
thermostat
■ see installation report and the
controller/channel numbering
under thermostat batteries cover
■ force thermostat to transmit and
check so if the corresponding
LED's are flashing
the thermostat of
single rooms were
mixed up
place the thermostat in the
room supplied by the loops
controlled by the thermostat
the white indication can not be seen
in the indicator window of the
actuator
actuator does not
open
replace the actuator
room too warm (or
too cold in cooling
mode)
1
the corresponding loop is warm
even after a long period without
heat call
actuator does not
close
■ check that the actuator is
correctly mounted
■ replace the actuator
the floor is cold
2
■ no heat demand (from underfloor
heating system)
■ the room is heated by another
heat source
room temperature
OK, but the floor is
cold