[FSD-808HP] Why does the Power Usage Alarm 1-4 LED just keep flashing? Is there any issue with my FSD-808HP?

Here is way how does the 1-4 / 5-8 LED work about.
PLANET FSD-808HP PoE budget is 140Watts. We make 1-4 port for charging 70Watts and 5-8 port for another 70Watts.
When 1-4 or 5-8 port PoE output is reaching or over 80% (Around 56Watts), the 1-4 / 5-8 LED will light.
When 1-4 or 5-8 port PoE output is almost reaching 100%, the 1-4 / 5-8 LED will blink.