User manual

5151
21. Intended use
The programmable radiator control unit is used to control
a conventional radiator valve. Only operate the device in
inside rooms and avoid the inuence of moisture, dust and
sunlight or external heat radiation. Any type of use other
than that described in these operating instructions does
not comply with the intended use and leads to automatic
exclusion from warranty and liability claims. This also ap-
plies in the case of conversions and modications. The
devices are solely intended for private use.
22. Troubleshooting and maintenance
Error code in
the display
Problem Rectication
Battery symbol
( )
Battery output
too low
Replace the bat-
teries
F1
Valve drive is
stiff to move
Check the installati-
on and heating valve
F2
Actuating range
too large
Check the fastening
of the radiator con-
trol unit
F3
Actuating range
too small
Check the heating
valve
The programmable radiator control unit performs a
decalcifying run once a week on Saturday at 12:00 to
protect against calcication of the valve. During this
„CAL“ appears in the display.