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• Clean the unit with a soft cloth. Do not use chemical cleaners as they may remove paint
or markings or may corrode the CLMD12 enclosure or seals. Do not use any cleaners
containing acetone, as they will deteriorate the plastic enclosure.
• Ensure that the unit is mounted securely and cannot be moved relative to the mounting
surface. If the unit is loose, tighten the mounting screws.
• Check the security of the cable connected to the NMEA 2000
necessary.
• Check the security of all of the input and output connections to the unit and tighten if
necessary.
6 Troubleshooting
If you notice unexpected operation of the Maretron CLMD12, 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 8 for contact information).
Symptom
No breaker/switch data
visible on NMEA 2000
network.
A breaker/switch always
reads "Error"
A breaker/switch is
"ON", but the load is not
powered.
Revision 1.6
Troubleshooting Procedure
• Ensure that the CLMD12 is properly connected to the
®
NMEA 2000
• Ensure that the CLMD12 instance of the breaker/switch
component matches the instance programmed into the
CLMD12, as described in Section 3.5.5.1.
The CLMD12 may have shut down the affected channel due to an
overtemperature or overcurrent condition detected on the
CLMD12 breaker itself.
• Ensure that the current drawn by the load is less than the
current rating for the connected channel.
• Ensure that no short circuits or other wiring problems exist
on the load circuit, and reset the channel by turning it OFF,
then ON.
• If the breaker or switch control returns to the error state,
closely examine the load wiring for problems and ensure
that the load draws the appropriate amount of current.
• Ensure that the load is connected to the load terminal of
the same CLMD12 channel that the breaker/switch
component is controlling.
• Ensure that the load's terminal which is not connected to
the CLMD12 is connected to vessel ground.
• Ensure that the connection between the breaker and the
channel's power terminal is good.
• Ensure that the breaker supplying power to the channel is
not tripped.
®
network.
®
connector and tighten if
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