14
2. The display is lit, but heating is not working.
a. Is it the real room temperature that can be seen on the display?
NO – The thermostate needs calibration. Calibrate the device according to the
description in the instructions manual.
YES – see next answer.
b. When the thermostat is turned on touch the button so that the set value
exceeds the room temperature. Is the heating icon appearing on the display in a few
seconds with a soft clicking sound?
YES – The thermostat switches on. If the system still does not heat, further settings
are needed.
It can occur on certain types that the thermostat does not supply power
through output points (controller does not switch on heating). The reason behind this
is the so-called „open window” function which turns off the heating in the case of high
drop of temperature to save energy. After airing through windows the thermostat turns
on automatically. The other possible reason is the selection of heating mode, based on
this the thermostat can control electric radiator, infrared panel heater and celiling- or
floorheating. Depending on the heating mode setting, the thermostat will turn off the
heating for 0, 2 or 4 minutes, respectively, within 20 minute cycles.
NO – see next answer.
c. Does the thermostat control a surface heating system?
YES – Check the controller’s surface limit values as described in the instructions manual.
If necessary, the setting limit value can be increased. If the surface temperature shows
an unrealistic value, further examination is required. If there is a piece of furniture, a
carpet or other heat insulating material over the floor sensor of the thermostat, remove
it so that the affected surface can give off heat. If there is no such a reason, the sensor
might be damaged.
NO – The thermostat requires further examinations. Please, send it to our central brand
shop or order our on-site troubleshooting and repair service.
3. After switching on or increasing the temperature value the thermostat clicks, the
heating icon is visible, but there is still no heating.
a. Is the power of the heating circuit higher than 3 kW (13 A)?
YES – the circuit in question is supplemented with a power switching relay. Please, ask
your electrician to check the proper working of the power switching relay, or order our
on-site troubleshooting service.
NO – see next answer.
b. Are the heating power supply wires connected to the built-in relay of the thermostat?
NO – Ask your electrician to connect it or order our on-site troubleshooting service.
YES – see next answer.
c. Can you measure voltage on the thermostat’s switched output?
YES – The thermostat functions well, troubleshooting should be continued with further
tests on the heating side.
NO – The thermostat requires further examination, so please, send it to our central
brand shop or order our on-site troubleshooting and repair service.