EUROSTER UNI4
–
USER MANUAL
4
Additional heating source on (feeding no.2, with the buffer)
The symbols shown in the controller have the following meaning:
Pump operation
Mixer operation
No icon
–
thermostat operation off; flashing icon
–
thermostat operation on; active
symbol - heating switched on by a room thermostat
Anti-Stop algorithm active
Thermal cleansing of DHW
Main heating source active (feeding no. 1)
–
boiler relay output (NO-COM) shorted
Activated DHW priority function
Additional heating source active (feeding no. 2)
–
voltage at the buffer pump output
AF
Frost protection switched on
3.2. Multifunction knob
The controller is operated with a multifunction knob. In addition to a rotary face used to
change the set value, it contains 4 buttons used for navigation (selecting between menu items:
up, down, next, previous) and a confirmation button located in the center of the knob, which
also clears the display of alarm warnings.
CAUTION! When changing a setting, the new value is only stored after being
confirmed with the center or right button.
3.3. LED
A light-emitting diode is located on the left-hand side of the display. The colors have the
following meaning:
◼
Green: Operation, no errors
◼
Red: An error has occurred
◼
Blue: Menu active
◼
Yellow: Output testing mode
3.4. Reset and restoring factory settings
To restore factory settings, press the Reset button and hold it for at least 5 s; the factory
settings window will be displayed.
The options are:
◼
Reset
–
YES/NO
◼
Language selection
◼
Cooling
–
YES/NO
◼
Store/EXIT
Select “Reset”, switch to YES
,
and confirm by selecting “Store/EXIT”.
CAUTION! Restoring factory settings may lead to improper operation of the system
and in extreme cases, it may lead to a failure or damage to the system.
