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13.2.2 Fault - action
1. Speed and distance functions: No reading ( --- )
- C13 (COG) should be OFF, if no navigator is connected.
If you have a voltmeter available, you can check the condition of
the transducer. When measuring with voltmeter check that
everything is connected, that the power is on and make sure the
paddle wheel is rotating.
At the Server right hand side, measure between pin 2 and 4.
When not rotating, the value should be fixed at either about 0 or
5V DC. When rotating very slowly, by hand, the value should flip
between 0 and 5V DC. When rotating faster, the value should
average around 2.5V DC.
Irregular values: Check the speed damping (SEA), (see 6.2.7).
2. Compass: No reading ( --- )
− C76 should be OFF, if no NMEA compass is connected.
− Make sure the (Auto DEV) routine is done correctly, (see
12.4.1)
− Make sure the transducer is not mounted upside down.
− The transducer cable should face down.
− Make sure transducer is aligned correctly, (see 12.3.7, C36).
With a voltmeter, on the Server right hand side, measure between
pin 10 and 12, and between 11 and 12.
When the compass is rotated one turn (360*), the average value
should vary between 0.8V DC and 4.2V DC twice during the turn.
Irregular values: Check the compass damping (SEA), (see
8.2.3).
Make sure there are no ferrous items close to the transducer.
3. Wind: No reading ( --- )
− C77 should be OFF, if no NMEA wind is connected.
− If inaccurate wind data is received, check the connections
(separate through deck connection or below decks connection),
are properly made.
− Measure with a voltmeter, at the Server right hand side pins 14
and 16, and between pins 15 and 16.
− If the voltmeter shows 1.5 to 4V DC (minimum wind speed 3
m/s) at both measuring points, the transducer and the
connections are OK,
− If the voltmeter shows 0 or 5 V DC at both measuring points,
the transducer or the connections are defect. Contact you
Nexus dealer with this information.
− Make sure the transducer is aligned correctly, (see 12.5.6,
C54).
MAINTENANCE AND FAULT FINDING
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