Legend
1 OFF, summer winter mode selection/fault
reset button
2 Automatic/manual mode heating button
3 Heating - DHW programming button
4 Time and day setting button
5 Heating temperature adjustment button
6 DHW temperature adjustment button
7 User information/settings button
8 Vacation function/copy heating -
DHW program day button
9 Room temperature manual decrease button
10 Room temperature manual increase button
11 Heating program time bands
12 Day of the week
13 Hours and minutes
14 OFF mode
15 Manual heating operation
16 Automatic heating operation indication
17 Vacation function
18 Burner on and actual power
19 Summer mode
EN
120
20 DHW operation
21 Winter mode
22 Heating operation
23 Fault indication
24 Room temperature
25 Room frost protection
26 External temperature
27 Type of fault / Information
28 Fault RESET indication (blinking)
29 OpenTherm communication present
30 DHW ECO in progress
code 3541Z220 - Rev. 05 - 12/2021
(only with optional external probe connected)