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EMS100 User’s Manual
Page 8 Revision 1.1
4 Troubleshooting
If you notice unexpected operation of the Maretron EMS100, follow the troubleshooting
procedures in this section to remedy simple problems. If these steps do not solve your
problem, please contact Maretron Technical Support (refer to Section 0 for contact
information).
Symptom Troubleshooting Procedure
No engine data visible
on NMEA 2000
®
network.
Ensure that the NMEA 2000
®
network is operational by observing
displays. You should see information from components besides the
ones attached to the EMS100 which verifies an operational NMEA
2000
®
network. If you don’t see data, try disconnecting the NMEA
2000 connection you made to the EMS100 as something may
have been connected incorrectly.
Ensure that the Maretron wiring harness is securely connected
both to the EMS100 and to the existing engine wiring harness as
directed in the instructions supplied with the Maretron wiring
harness.
Once you are sure that the NMEA 2000 network is operational with
a connected EMS100, ensure that the NMEA 2000
®
connector on
the Maretron wiring harness is securely connected to the NMEA
2000
®
network.
Ensure that the ignition switch for engine is turned on. The
EMS100 draws the majority of its power from the engine power
connection.
Ensure that the EMS100 is programmed with an appropriate
engine NMEA 2000 instance as described in Section 2.5.1.
Ensure that all NMEA 2000
®
messages are enabled (see Section
2.5.16 for details).
Incorrect Engine Data Ensure that the settings for gauge type, sender type, and number
of flywheel teeth are programmed appropriately.
Check the values of sender offset programmed into the EMS100.
Incorrect Tachometer
Readings
Check the adjustment of the tachometer sensor on the engine.
Once the EMS100 is connected, you may need to adjust the
spacing between the sensor and the flywheel teeth.
Warning: There are no user-serviceable components inside the Maretron EMS100.
Opening the EMS100 will expose the sensitive electronic components to adverse
environmental conditions that may render the unit inoperative. Please do not open the