Regarding the dynamic pressure warning system on the 86 and ups;  I get a flashing light and buzzer scenario at idle once in a blue moon, according to everything I've run across this means, uh nothing?  The buzzer shouldn't buzz at low RPM right? (assuming true warning).  I plan on running through the Bentley troubleshooting tomorrown but I feel like I'm going crazy.  So if I get this right for true low pressure the light will come on at low RPM and the light and buzzer at high RPM?