My SB 700 shows temperature after few shuts and when it's twisted

From the SB 700 manual page b8:

v Notes on continuous fl ash photography • To prevent the SB-700 from overheating, allow it to cool down for at least 10 minutes after 15 times of continuous firing. • When continuous flash firing is repeated in quick succession, the internal safety function adjusts the recycling time by up to 15 seconds. If flash firing continues, the thermal cut-out indicator appears on the LCD and all operations are suspended. (0E-31) Allow it to cool down for several minutes to disable this function. • The conditions under which the internal safety function is activated differ depending on the temperature and the SB-700 flash output level. Operation B B-8 Slide the battery chamber cover open while pressing the battery chamber cover lock release. Insert the batteries following the [+] and [-] marks. Close the battery chamber cover. STEP 1 Inserting the batteries Operation B B-9 1.5 V alkaline AA battery 1.5 V lithium AA battery Rechargeable 1.2 V NiMH AA battery Suitable batteries When replacing batteries, use four fresh AA-type batteries of the same brand from any of the following types: • For minimum recycling time and number of flashes for each battery type, refer to "Specifications." (0H-27) • Alkaline battery performance may vary greatly depending on the manufacturer. • 1.5 V carbon-zinc AA batteries are not recommended. v Additional precautions regarding batteries • Read and follow battery warnings and cautions (0A-19 - A-22). • Be sure to read and follow the warnings for the battery on the section, "Notes on Batteries" (0H-9), before using the battery. • The recycling time can be longer when lithium AA batteries are used because they incorporate a function that suppresses the output current when heat is generated in the batteries.