Simrad Robertson AP9 Mk3, Instruction Manual, Page: 166 / 202

Robertson AP9 MK3 Autopilot
6-4
20169223D
WATCH ALARM
PRESS RESET
If a WA9 Watch Alarm (not in production any longer) is connected to
the Control Unit J4, an internal watch alarm timer is enabled.
The watch alarm warning signal is repeated every four minutes and
must be reset within one minute to avoid energizing the externally
connected main alarm (if any).
Note !
If a watch alarm is sounded when there is no watch alarm unit connected,
use the following procedure to permanently cancel the alarm:
Press the INFO and WEATHER buttons simultaneously, and step
through the INFO loop until SOFTWARE/RUNTIME is reached.
Press the DECREASE button 15 times to cancel the alarm (Ref. INFO
program-loop).
6.2 CD109 COURSE DETECTOR
a) Enter the DEBUG-mode and verify that the compass sine, cosine
(voltage swing of appr. 1,5-2,0V) and reference signals are correct.
If not, proceed to "b".
b) Check the cable and connector for open or intermittent connection.
If found OK, proceed to "c".
c) Try a new CD109.
6.3 FLUXGATE COMPASS
a) Enter the DEBUG-mode and verify that the sine and cosine signals
varies with the heading between approx. 0.5 and 4.5 volts. If not,
proceed to "b".
b) Check all connections between the compass and the control unit.
Check the cable for a possible brake in one of the wires. If found
OK, proceed to "c".
c) Try another fluxgate compass.
6.4 MALFUNCTION OF THE D90-91-92
No rudder movement
•
Verify that the command arrows on the AP9 MK3 control display
appears when a rudder command is given (Not for
± 10V).
•
If rudder commands are given, check that the LED's LD1 and LD2
are ON and that LD3 or LD4 lights up for PORT and STBD rudder
commands. If OK, check that LD5 is off. When ON, an overload is
present and the switching of the solenoids will be disabled.
•
Check limit switches connections on TB12 (1-3/2-4) and
eventually on TB16 (1-3/2-4)