The LLD-HD indicator displays the value of fuel volume in the tank.

Shortly pushing the button will allow you to go to the next value viewed on the display:

• total volume read from both sensors (the Σ LED emits light);
• fuel volume read from the 1st LLS sensor (the 1 LED emits light);
• fuel volume read from the 2nd LLS sensor (the 2 LED emits light).