Viessmann Vitotron 100 Operating Instructions For The System User page 11

Control panel VMN3
Status display
Circulation heating
DHW circulation pump is running
Fault in the flow temperature sensor. In the event of a fault in the sensor
that measures the flow temperature of heating circuit 1, "- -" is displayed
Heating circuit temperature too low. Appears when the set flow temperature
in heating circuit 2 is not reached within 15 minutes
Heating circuit operation is interrupted
Active central heating program display
Time controlled (daily/weekly program)
PARTY – maintains a comfortable room and DHW temperature
HOLIDAY – maintains a comfortable, energy saving or frost-free room and DHW temperature
MANUAL – maintains the set room temperature
Heating signal blocked by master appliance
Room temperature display
Frost protection
Energy saving temperature
Comfort temperature
Comfort temperature plus
Comfort temperature minus
(cont.)
Operation
11