Inverter output function: Turning on the switch of the front panel, the inverter will convert the DC power into pure sine wave AC power.
Over voltage protection function: When the battery voltage is higher than the set value, the device will automatically cut off the inverter output when the front panel LED flash 3 times per second and the buzer alarm frequently sound.
Under voltage protection: When battery voltage drops below the set value, the device will automatically cut off the inverter output and the LED on the front panel flash 1times per second, buzzer sound 1 times per second until voltage rise to the voltage recovery point, then the inverer back to work.
Overload,short circuit protection: if the load exceeds the rated power or a short ciurcuit , the front panel LED will blink 2 times per second and the buzzer frequency of 2 times per second alarm sound. This stae can not restore itself, please turn off the power switch and check to make sure whether the short circuit and loasd whthin the allowed range.
Fans, automatic control and the thermal protection: If the machine internal temperature reaches the set point, the fan will start automatically. If the temperature is too high,the device will automatically cut off the inverter output and the LED on the front panel will blink 2times per second and ber alarm 2times per second. This state is not self-recover, so you need to turn off the power switch until the temperature down.
Reverse battery protecton function: The device has a complete reverse battery protection, reverse polarity, such as battery, the fuse in the chassis will be automatically blown to prevent damage to the battery and equipment. But still the battery polarity is strictly probibited.
AC input low voltage protection: when the AC inut voltage is lower than 150V, the inverter will cut off AC output automaticaly, at the same time it stops charging the storge battery, the yellow indicator will be off; if the power switch of the item is on at this time, it can convert the output automatically, so it is convenient and can supply stable voltage.
AC input over voltage protection: when the AC input voltage is higher than 250V, the inverter will cut off AC output automaticall, at the same time it stops charging the storage battery, the yellow indicator will be off; if the power swith is on at this time, it can convert the output automatically, so it is convenient and can provide you with stable voltage.