jpi edm

Hi everyone- I've just installed a JPI 830 EDM in my '68 Cardinal and I'm trying to get my Aera 660 to talk to it. I've followed the directions for the 496 (because there isn't anything for the 660) on the JPI site to set the Aera 660 to send at NMEA 4800 baud, and confirmed that the 830 is to...

So my EDM thinks I’m out of fuel. I select the option for full fuel when the unit starts. But immediately it reads “0 REM”. I suppose the transducer could be bad, or fouled, but I would have expected a different message (according to the manual). Has anyone experienced this?