Whirlpool 10 cu. ft. / 283 liter Chest Freezer EH100FXKQ "red triangle symbol" Questions

...under counter freezer Bought a second hand freezer.Plugged it in and a red light with a triangle symbol has come on with a beeping sound.Maybe needing reset but dont know how to do it. Is all ok

red triangle symbol lit up what does this mean? This means the sensor has determined that the temperature is rising. This can happen if the door was left open or an unusual amount of warm food was put