P 1 in mode in akachi heater application program

P 1 indicates low grade. P 1 and p2 indicate the number of power gears you are using now. P 1 is the lowest power gear. For example, the cooking function of the electric heating table can be turned on after the power supply is turned on, and the switch has different gears, which can be selected as needed, and then the cooking function key is selected.