Status LED
The MF 2500 Fish Finder is in Standalone DST (Depth, Speed, Temperature) mode, but is not pinging because Transducer ID has not detected a transducer. This condition will occur if there is no communication with the chart plotter, and no transducer is connected.
3. STANDALONE DST
LED Behavior: 1 long flash every 2 seconds
The MF 2500 Fish Finder is in Standalone DST mode, and is pinging normally. This condition will occur if a transducer is connected properly, but there is no communication with the chart plotter. In Standalone DST mode, the NMEA 0183 output produces standard NMEA Depth, Speed, and Temperature sentences.
4. NORMAL FISH FINDER MODE
LED Behavior: 1 short flash every 2 seconds
The MF 2500 Fish Finder and the transducer are operating properly. This is the normal behavior when everything is working.
5. WAITING FOR COMMAND
LED Behavior: 2 short flashes every 2 seconds
The MF 2500 Fish Finder is not pinging because it is waiting for a command from the chart plotter.
6. LOW POWER MODE
LED Behaviour: 3 short flashes every 2 seconds
The MF 2500 Fish Finder has detected a transducer without trasducer ID, but the "ignore" command has been selected on the chart plotter so the unit is pinging at low power.
7. NO TRANSDUCER MODE
LED Behavior: 4 short flashes every 2 seconds:
The MF 2500 Fish Finder is not pinging because transducer ID has not been detected a transducer and the "ignore" command has not been selected on the chart plotter.
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Owner's Manual