Or the display flashes FF and harmonisation is then impossible.
Note: If no action is taken on the + and -‐ buttons for 15 seconds, the display returns to the initial
position, that is 19.
3
-‐ TROUBLESHOOTING
NATURE
VERIFICATION
ACTION
The device does not heat
• Ensure that the switch is in
position 1.
• Set the switch to position 1
• The heating indicator is off.
• Check the value of the
setpoint.
• The room temperature does
not require heating.
• The device is in EC (economy)
or in shunt mode: ensure that
the shunt system has not cut
off the power supply for the
device.
• The device is switched off
following an open window
detection. Refer to chapter
• The heating indicator is still
not on.
• Ensure that the installation
circuit breakers have triggered.
The device heats all the time
• Check that the setting of the
temperature has not been
changed.
• Check that the device is not
located near an open door
and/or near an unheated room
or in a draught.
• Set the temperature again.
• Close the door, heat the room
or remove the draught.
The device does not follow the
programming orders
• Check the preset
programming.
• Set the programming modes.
IN ALL OTHER CASES, CONTACT A QUALIFIED PERSON
55.