OVERLOAD 

When the output power is greater than the continuous power (500W), this product is capable of, an alarm will sound and the word OVERLOAD will be displayed in the LCD screen. Reduce the power draw from the electronic devices connected. If the AC Output is turned OFF, press the AC ON/OFF button to restart the power station.

HIGH TEMPERATURE

When the the internal temperature is higher than 35°C or the output power is greater than the continuous power (500W), the cooling fan will kick in. When the internal temperature is higher than 80°C, the temperature alarm will sound. The AC and DC outputs will shut off and the LCD screen will display HI TEMP. You will need to wait until the internal temperature drops below 40°C to restart.