2. If the generator wasn’t in use for some month it should be plugged in the mains for a few hours before use (doesn’t matter if with or without a lamp head) .For about one hour the lowest flash power should be programmed, then on position 5 for another hour more and in the end the highest position 9 should be taken. The formatting is finished, when the green LED of the FLASH TEST –button doesn’t flicker anymore. Instead of flickering it blinks slowly in sequences of approx. 30 sec. After formatting the flash can be ignited.