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FFM100 User's Manual
5 Troubleshooting
If you notice unexpected operation of the Maretron FFM100, follow the troubleshooting
procedures in this section to remedy simple problems.
Symptom
No Fuel Flow
1. Ensure that the FFM100 is properly connected to the NMEA 2000
data visible on
®
NMEA 2000
2. Ensure that fluid flow sensors are properly connected to the FFM100.
network.
3. Ensure that each channel that you wish to monitor is configured
4. Ensure that the FFM100 has the appropriate NMEA 2000 PGNs
No Fluid
1. If operating in the NMEA 2000
Temperature
data visible on
2. Ensure that power is supplied to the NMEA 2000
®
NMEA 2000
network.
3. Ensure that both trunk line terminators are in place. Proper network
Fluid will not
1. Check the meter for foreign matter blocking the rotors. Dismantle the
flow through the
fluid flow
2. If a line strainer is installed, check to see whether it is blocked, and
sensors
3. Check the rotors to see if they are damaged, and replace if necessary.
4. Check the sensor connections to see if they are over-tightened, and
Reduced flow
1. If a line strainer is installed, check to see if it is partially blocked, and
through the fluid
flow sensors
2. Ensure that the fluid being measured is less than 1000 centipoise
Inaccurate fluid
1. Ensure that the fluid flow rate is within the minimum and maximum
flow reading
2. Check for air in the system, and bleed if present.
3. Check the fluid flow sensor body and rotors for excess wear caused
If these steps do not solve your problem, please contact Maretron Technical Support (refer to
Section 7 for contact information).
Page 18
Troubleshooting Procedure
network.
correctly and that instance numbers are configured correctly.
enabled.
®
NMEA 2000
interface (see Section 2.5.1) and tighten if necessary.
network power can be checked by measuring the voltage at an open
tee between NET-S and NET-C. The voltage should be between 9 and
16 volts.
termination can be checked by removing network power and
measuring the resistance at an open tee between NET-L and NET-H
signals. The resistance should read approximately 60 ohms (two 120
ohm terminators in parallel equals 60 ohms).
sensor and clean the rotors, then reassemble the sensor.
clean if necessary.
re-adjust if necessary.
clean if necessary.
viscosity.
specifications for the sensor.
by incorrect installation.
Figure 8 – Troubleshooting Guide
®
Mode, check the connection to the
®
network. Proper
®
Revision 1.2
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