The switches and the alert logic have changed in the EC135.
The switch change (dual action) became standard from s/n 2027 so will be build standard on all new P3H and T3H. It is also available as SB (SB EC135H-28-001).
The logic to illuminate the AFT and FWD FUEL PUMP has changed on P3H and T3H. The alert no longer illuminates for dry running pumps so no drill to switch them off. The amber caution is replaced with a white advisory MAIN FUEL LOW to bring to the crews attention that fuel is running low.
The pump alert is not driven driven by a temperature sensor. It is driven by a shunt that senses the current and triggers the alert.