Diagnosis
The fuel type used for heating is specified in the master data mask forthe heating system. Settlement units are then assigned for the heatingsystem. If they have a service charge key which is linked to a fueltype, this fuel type must be the same as the fuel type for the heatingsystem.
If the assigned settlement unit has a service charge key linked to afuel type, this fuel type must be the same as the fuel type for theheating system. Either change the fuel type for the heating system orselect a settlement unit with the service charge key for the same fueltype as the heating system.