Unlock the Yocan Wit by rapidly tapping the button five times. The three LED lights above the button will flash. Once it is on press the button three more times to select a voltage level. Each of the three lights represent one of the Wit's available voltage power levels, going Low to High from left to right.
Tips to fix Yocan Wit flashing 5 times.
1, Try to re-install the 510 adapter, and the oil cartridges.
2, Clean the contact points, use q-tip or cotton with Isopropyl Alcohol.
3, Contact the shop you bought it from.