Troubleshooting | 111
Autopilot failures
In the event of an autopilot failure, the AP28’s numerous
test features will assist you in isolating a probable fault.
Audible and visual alarm are provided for every fault
being detected, see chapter
5.
Refer to the table below for hints and try to solve the
problem yourself. You may also consult your nearest
Simrad dealer for assistance, if required.
Perform any repair action in the listed sequence.
1 The ‘Off course’ warning is automatically reset
when the error is rectified.
2 – – – in a display indicates that data is missing.
6.4 Alarms
Display
readout
Probable fault Recommended action
System failure Alarms:
Off course Boats heading is outside the
fixed off course limit of 20
deg. (Automatic reset when
inside limit). Extreme
weather conditions, too slow
speed
Check steering parameters
(Rudder, Autotrim, Seastate-
filter)
Increase Rudder value
Increase boat speed, if
possible, or steer by hand
Nav data
missing
Missing or invalid NAV data Check the Nav. Receiver/GPS
setup
See Service menu Chapter
4.3
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