EF3000iSEB Green/Red Lights

What do the green and red LED lights located on the circuit board directly under the valve cover indicate?  I have two of these generators which are performing just fine, as far as I can tell.  The red LED is illuminated when the generators are running with the econ switch on or off.  I have only looked at the lights with the generators running with no load.  I don't know which LED illuninates under a load.  
Since the generators both operate normally this is a curiosity issue, but red is generally not good.
Thanks
Mitch