Buderus Logamax plus GB162 Applications Manual page 9

MCM10 Front Panel
1 3
2
GRN
Off: No power / internal error MCM10
1
On: Standard operation
GRN
Off: Pump off
2
On: Pump on
RED
Off: Switching contact not activated
3
!
Blinking: System fault (example : system pressure too low or error in
the heating appliance(s))
GRN
Off: No communication
4
On: Communication between MCM10 and the previous MCM10.
GRN
Off: No heat demand, heating appliance stand by
5
On: Heat demand, heating appliance in operation
5
4
Communication between MCM10 and a Heating Controller (e.g. RC35)
7