I used the Repetier.com/firmware/v092 to generate code for a delta with a single heaterblock and nozzle with 3 extruders.(Mixing Extruder (1 Nozzle/heater + 2 or more filament feeder)
I used the same configuration.h file than in v091 - only difference was I selected "Mixing Extruder (1 Nozzle/heater + 2 or more filament feeder)" in the Temperature section of v092.
The problem is that the heaterblock does not heat up when I select "Preheat ABS" or the dial under TEMP 1(the only temperature that will show in v092 whereas in v091 all three will show) on the Smart controller or when I select any one of the extruders (only Extruder 1 will show a bar and change on/off )( all 3 extruders are in the drop down box an when selected the temperature will show at the bottom of screen) in Repetier_Host
The only temperature on/off will be on Extruder 1 but will not heat the heater block when selected as ON.
I tested the hardware with the code from V091 with 3 extruders and 1 heaterblock/nozzle and it is heating up - so not a hardware problem.