Photo above shows Type A
1) Unlock your dispenser and open the cover
2) Press and hold Button 1 until the hours blink
3) Press Button 2 (reverse) or 3 (forward) to set the correct hour
4) Press and hold Button 1 for 5 seconds to save
5) Close cover and lock your dispenser
Photo above shows Type B
1) Unlock your dispenser and open the cover
2) Press and hold Button 1 until the ":" blink
3) Press Button 2 to set the correct hour
4) Press and hold Button 1 for 5 seconds to save
5) Close cover and lock your dispenser
Photo above shows Type C
1) Unlock your dispenser and open the cover
2) Press and hold Button 1 until "CLOCK" is shown
3) Press Button 3 until the correct time is reached
4) Press and hold down button 1 to store the setting
5) Close cover and lock your dispenser