Press and hold the arrow keys at the same time until the message set appears on the display followed
by the flashing message 24h.
12-hour or 24-hour clock option. Press the - button to choose whether to set the clock to 12-hour or
24-hour format.
If the 12-hour clock is selected, the current time will be displayed or, if in programming mode, the letter
A (a.m.) or P (p.m.) will appear to indicate the correct time.
Example:
A 4:00=4 at night (4:00) / P 4:00=4 in the afternoon (16:00).
