Troubleshooting - NorthStar EXPLORER AP380 Installation And Operation Manual

9 Troubleshooting

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 the
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 AP380 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 AP380 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 AP380 is in GPS mode) or wind
gain (if AP380 is in wind mode)
(see section 8-1).
Northstar Explorer AP380 System Installation and Operation Manual
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 AP380 is in GPS mode) or wind
gain (if AP380 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.
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