Milan, I'm attaching the Auber manual for the 1500GPH, which works identical to your controller. Dave is right, though; the easiest way is to set the program - just takes about 15 seconds to run through the 6 programs.
If you want to bypass the programming, and put it in single-temp mode, see the other attachment.
The programming is easy, once you understand the 3 parts of each of the 6 "steps."
1. C01 - C06: What box temp?
2. E01 - E06: What trigger? Time (t) or internal meat temp (F)?
3. F01 - F06 (for meat temp) or displayed as t01 - t06 (for time): Desired result? In other words, how much time, or what meat temp?
So, you always set box temp, trigger and desired result of each step. If you only use one, say for brisket, it would look like this:
C01 225 E01 F F01 195
C02 0 E02 t t02 0.00
(repeat zeros for C03-C06)