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Simrad AP26 and AP27 Autopilots
118 20221586B
6 TROUBLE SHOOTING
An autopilot is a complex system. Its performance dependents
on a proper installation and a successful sea trial.
In the event of an autopilot failure, the autopilot’s numerous test
features will assist you in isolating a probable fault.
Audible and visual alarm is provided for every fault being
detected.
The audible alarm is reset by pressing any button (e.g. by
changing mode from AUTO to STANDBY). All visual alarms
will remain and alternate with the operating display until the
fault has been rectified. 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.
Notes!
1. ‘Compass difference’, ‘Vessel off course’, and ‘Rudder limit’
warnings are automatically reset when the error is rectified.
2. – – – in a display indicates that data is missing.
6.1 Alarms
Display readout
Probable fault Recommended action
System failure Alarms:
The boat is off
course
Boats heading is
outside fixed off
course limit of 20
deg. (Automatic reset
when inside limit.)
Extreme weather
conditions, too slow
speed.
1. Check steering parameters
(Rudder, Autotrim, Seastate-
filter).
2. Increase Rudder value
3. Increase boat speed, if possible,
or steer by hand.
NAV. data failure Missing or invalid
NAV data.
1. Check the Nav. Receiver/GPS
setup.
2. See Service menu Chapter 4.9.