Simrad AP25 Manual page 106

Simrad AP25 Autopilot
The Motor Drive out (displayed in percentage) is the amount of
available power needed to achieve recommended rudder speed
when on automatic steering Maximum speed (100%) is used in
NFU mode. See also "Final Sea Trial" on page 132.
The screen also tells whether a clutch is installed or not.
If the Automatic rudder test fails, refer to "Alarms" beginning on
page 139
Test of LF3000/LFI3000 Mk2 feedback
1. Align engines to centre position; "zero rudder".
2. Rev engines to 3-4000 rev/min and observe the rudder angle
3. If the rudder angle exceeds 2°, connect the screen on the TB1
Proceed to next menu item by pressing STBD button.
104
indicator on the autopilot, a 2° change in the reading should
be accepted.
cable to the centre block terminal and repeat item 2 (See
Figure 3-30). If this gives a better result keep the screen
connected.
20221495F