FPM100 User’s Manual
5 Troubleshooting
If you notice unexpected operation of the Maretron FPM100, follow the troubleshooting procedures in this section to remedy simple problems.
Symptom
No Pressure data visible on NMEA 2000® network.
Inaccurate pressure output
No Tank Level data visible on NMEA 2000® network.
Inaccurate tank level output
Zero pressure readings when pressurized
Troubleshooting Procedure
1.Ensure that the FPM100 is properly connected to the NMEA 2000® network.
2.Ensure that pressure transducers are properly connected to the FPM100.
3.Ensure that each channel that you wish to monitor is configured as “Pressure/Vacuum”and that instance numbers are configured correctly.
4.Ensure that the FPM100 has the appropriate NMEA 2000 PGNs enabled.
1.Ensure that the “Pressure at 4mA” and “Pressure at 20mA” configuration items are set to appropriate values for the pressure transducer.
2.Check that the vent tube from the pressure transducer (only present on some transducers) is not kinked or blocked.
3.Remove the pressure transducer from the tank opening and ensure that the pressure port on the transducer is not clogged.
1.If operating in the NMEA 2000® Mode, check the connection to the NMEA 2000® interface (see Section 2.5.1) and tighten if necessary.
2.Ensure that power is supplied to the NMEA 2000® network. Proper network power can be checked by measuring the voltage at an open tee between
3.Ensure that both trunk line terminators are in place. Proper network termination can be checked by removing network power and measuring the resistance at an open tee between
1.If operating with a rectangular tank, ensure that the tank depth is programmed properly (see Section Error! Reference source not found.).
2.If using custom calibration,
3.Check that the vent tube from the pressure transducer is not kinked or blocked.
4.Remove the pressure transducer from the tank opening and ensure that the pressure port on the transducer is not clogged.
1.Ensure that the “Pressure at 4mA” and “Pressure at 20mA” configuration items are set to appropriate values for the pressure transducer.
2.Check the cable connection to the pressure transducer to see whether a wire has become loose, or the cable has been cut.
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