AUTOPILOT
English
8-29
8 Fault finding
8.1
General
Before you contact your Nexus dealer and to assist your dealer to give you a better
service, please check the following points and make a list of:
•
All connected instrument and transducers, including their software versions.
•
Nexus Network ID numbers for each instrument (displayed at power up).
In most cases, the reason for faults in electronic equipment is poor installation.
Therefore, always first check that:
•
Installation and connection is made per instructions for instruments and
transducers.
•
Screw terminals are carefully tightened.
•
No corrosion on any connection points.
•
No loose ends in the wires, causing short cuts to adjacent wires.
•
Cables for damage and that none are squeezed or worn.
•
Battery voltage is sufficient, should be at least 11 V DC.
•
The fuse is not blown and that the circuit-breaker has not opened.
•
The fuse is of the right type.
•
Two instruments do not have the same ID number.
8.2
Symptom - Cause - Action
In the table below, causes marked [ * ] are more likely to occur during installation or
when rewiring has taken place.
Symptom
Cause
Action
Autopilot turns off
*
Voltage
below
minimum.
Make sure 12/24 V is applied to
battery terminals at Course Processor.
Autopilot does not
turn on
*
Voltage
not
applied.
Make sure 12/24 V is applied to
battery terminals at Course Processor.
* Voltage polarity is
reversed.
Make sure + and - is applied to correct
terminals, Check Fuse as fuse may
have blown due to reverse polarity
* Boats safety switch
is open.
Close the safety switch.
* Fuse burned out.
Check and replace fuse as necessary.
Autopilot turns on,
but
the
pumpset
does not run
Slow
blow
(high
current)
fuse
in
Course Processor is
blown.
Return unit to factory for service,
70Amp fuse has fused in Course
processor.
Pumpset motor turns
but the rudder does not
move
Broken or loose motor
coupling.
Replace or tighten coupling as necessary.
Pumpset contamination Clean or replace pumpset
