Simrad AP70 Operation Manual page 42

Alarm/Warning Type
Navigation data
W/A
missing
New WP
No rudder response
Off heading
Override
Position data missing W/A
Rudder data missing
Rudder limit
Rudder too slow
Sharp turn
40 |
Warning/Alarm condition
Lost sensor data
(NAV mode)
Ref. "Course change confi rm
A
limit" in NAV
No response to rudder
A
command
Boats heading is outside set
A off heading limit. Automatic
reset when inside limit
1. EVC override via SG05
2. Override via SD80/AD80
W Handshake (ref. KaMeWa)
3. Override via SD80/AD80
RUD UI port
Lost sensor data
(NoDrift mode)
Rudder angle signal to faulty
A
board is missing
Limit rel. to rudder cmd in
auto modes. Not applicable
W
for NFU/FU where rudder
shall stop at max -3°
Rudder speed from RF < 2°/
W
sec
Acceleration > set g-limit
W
(Alarms - settings)
The alarm system | AP70/AP80 Operator Manual
Possible cause and recommended action
Navigation data from Plotter/ECS is missing.
1. Check Device list for valid navigation source
2. Try a new automatic source update
3. Check the Plotter/ECS and cable connections
Nav mode only; Course change from one leg to the next is
exceeding set "Course change limit"
1. Check all connections
2. Check Rudder FB transmission link (not applicable for
Virtual feedback installations)
3. Check drive unit motor/brushes
4. For SD80, check that port/stbd led is activated (ref label
in cover for location
5. Replace the Autopilot Computer Drive board
May be caused by extreme weather conditions, and/or too
slow speed.
1. Check steering parameters (Rudder, Autotrim, Seastate-
fi lter)
2. Increase Response/Rudder value
3. Increase boat speed, if possible, or steer by hand
If unintended warning, make sure override handle is
not being activated by loose objects. Check cabling and
override switches connected to Handshake port of faulty
SD80 or AD80 board
Position data from the GPS is missing.
1. Check Device list for valid position source
2. Try a new automatic source update
3. Check the GPS and cable connections
If several rudder angle sensors, check which one the faulty
board is set up for use (refer "Drive test/calibration" on page
46). If the missing sensor is connected to an autopilot
computer check cabling to the board. If missing sensor is a
CAN device, check backbone bus network connection.
The set rudder limit has been reached or exceeded. This
is a warning only and may be caused by disturbance
to compass (waves), speed log, sharp turn or improper
parameter setting.
Excessive load on steering gear. Air in hydraulic system.
Insuffi cient 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
If unintended warning, check that the boat speed to the
autopilot is correct. Check that set turn rate or radius
corresponds to actual