Gasboy FuelOmat system 8 Popt Commverter - Manual (Page 73)

2.13.4. Description for LED's on the MPI-C board
Figure 2-49 LEDs on the MPI-C
MPI-C MPI-C sub Signal Description
D_21 D_20 In Use ON=NOZZLE Out
D_16 D_17 Bypass/Authorization Bypass or Authorization ON=IN Bypass
D_18 D_19 Pulse Flash
D_10 D_11 N/A Software LED
8 Port CommVerter Operation and Installation Manual 69