Operation Manual

Robertson AP300X Autopilot
114 22081814H
5 TROUBLE SHOOTING
An autopilot is a complex system and the performance is dependent of
a proper installation and a successful sea trial.
In the event of a failure, you will be helped by the AP300X software
which contains several test features that will assist you in isolating a
probable fault.
Audible and visual alarms are given in the event a fault is detected.
The audible alarm is reset by pressing any button (e.g. by changing
mode from AUTO to STBY). The visual alarm 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,
or consult your nearest Simrad Robertson dealer for assistance.
Perform the repair action in the listed order.
5.1 Alarms
Display readout Probable fault Recommended action
System failure Alarms:
Rudder
feedback failure
Rudder feedback
signal missing or
erratic
1. Check all connections.
2. Replace rudder feedback unit.
Rudder
response failure
No response to
rudder command.
1. Check all connections
2. Check Rudder FB transm. link.
3. Check Drive unit motor/brushes.
4. Replace junction unit Power PCB.
Rudder test too
slow
Excessive load on
steering gear.
Air in hydraulic
system.
Insufficient drive
unit capacity.
1. Look for mechanical obstructions at the
rudder/tiller/quadrant. Check the back
drive force.
2. Bleed the hydraulic system
3. Replace with bigger pump unit.
Compass data
missing
No data from
selected compass.
1. If more that one compass is connected to
the system, refer to the USER SETUP menu
to select a different compass.
2. Check connections.
3. Replace PCB or complete unit.
Comm. failure
active AP300X
Active control unit
goes silent, typical
if AP300PX is
disconnected.
1. Press STBY button on "Inactive" unit to
reset.
2. Check/repair Robnet cable
3. Replace Control unit or PCB