44
Northstar NS3300 Pilot
This troubleshooting guide assumes that you
have read and understood this manual.
It is possible in many cases to solve difficulties
without having to send the unit back to the
manufacturer for repair. Please follow this
troubleshooting section before contacting your
nearest Northstar dealer.
There are no user serviceable parts. Specialized
methods and testing equipment are required to
ensure that the unit is reassembled correctly.
Repairs to the unit must only be carried out by a
service centre approved by Northstar.
Users who service the unit themselves will void
the warranty. More information can be found on
our Website: www.NorthstarNav.com.
1 Unit will not turn on:
a Fuse blown or circuit breaker tripped.
b Battery voltage is outside the range 10.5 to
30.5 V DC.
c Power/data cable damaged.
2 Autopilot makes too frequent course
corrections:
The value of response is too low (see section 8-1).
3 When sailing a straight course, the boat
drifts from side to side of the course:
a The boat should drift from side to side of
the course when the autopilot steering
is optimized.
b Change to a profile suitable for boat speed
and sea conditions (see section 8-2).
c If the boat drifts too far from the course, adjust
response, ratio, counter rudder gain, GPS gain
(if autopilot is in GPS mode) or wind gain (if
autopilot is in wind mode) (see section 8-1).
9 Troubleshooting
4 When sailing a straight course, the boat drifts
off course:
a Change to a profile suitable for boat speed and sea
conditions (see section 8-2).
b Adjust response, ratio, counter rudder gain, GPS
gain (if autopilot is in GPS mode) or wind gain (if
autopilot is in wind mode) (see section 8-1).
5 When making a large course change, boat does
not follow the expected course:
a Change to a profile suitable for boat speed and sea
conditions (see section 8-2).
b Check turn rate is not too low (see section 6-3).
c Adjust counter rudder gain (see section 8-1).
6 Boat turns too sharply:
Reduce turn rate (see section 6-3).
7 The word SIMULATE flashes on the display,
values displayed are unexpected:
Unit is in simulate mode (see section 3-14).
8 The display fogs:
a Moist air has entered the breathing tube at the rear
of the unit. Air the boat or run unit with backlight
fully on.
b Water has entered the breathing tube. Return unit
for service.
