Set Starting Temperature:Press the "up" button once to display the starting temperature. Press and hold the "up" button for about 3 seconds, and the desired temperature can be set with the up and down key to set stop temperature: Press the button once to display the stop temperature. Press and hold the button for about 3 seconds, the stop temperature number will flash. The temperature you need is set with the up and down keys: "up 1" button & "button to set the mode at the same time; Press the "Down 1" and "Down 2" button to restore the factory settings at the same time to restore the factory settings. Positive value = measured value + correction value (group 2 temperature compensation is the same way) Note: Start temperature stop temperature code function setting range P0 compressor 1 delay time 0-60 minutes 0minP1 compressor 2 delay time 0-60 minutes 0 minutes P2 high temperature alarm value -55~120C/6 7-248 F 120C/248FP3 Low Temperature Alarm Value -55~120C/-67~248F -55C/-67F