Simrad AP80 User Manual

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The alarm system | AP70/AP80 Operator Manual
Alarm/Warning Type Warning/Alarm condition Possible cause and recommended action
Boat speed missing W/A Lost sensor data
The speed signal from the GPS or the log is missing.
1. Check Device list for valid speed source
2. Try a new automatic source update
3. Check the GPS, log, and cable connections
CAN bus failure A
Not possible to send or
receive data although bus
voltage is ok
Poor CAN bus backbone, defective cable/connector or
defective CAN bus receiver in autopilot control unit.
1. Check backbone terminations
2. Check cable and connectors
3. Replace Autopilot control unit
CAN bus supply
overload
W Current >4.3 A Check summary unit loads
A
Current >10 A for 1 ms, hw
shutdown
Excessive current draw.
Check for short circuit/defective device on network.
Check heading A
Lasting steering compass
heading jump >10° within 1
sec during automatic steering
A sudden jump in heading of more than 10 degrees is
detected
Check steering compass. Possibly change to other heading
source or monitor compass.
Compass difference A
Difference between steering
compass and monitor
compass +variance > set limit
The difference in readings between the main compass and
the monitor compass exceeds the limit set for “Compass
difference”.
Check the operation of both compasses. If one compass is
magnetic, the error may be caused by deviation change or
heavy sea disturbances.
Course difference A
Actual heading diff from track
course by set limit
Compass heading is deviating too much from the track
course (BWW). May be caused by extreme wind and
current, combined with low speed.
Cross track distance
limit
W/A XTD > XTD limit
XTD has reached set XTD limit in NAV/TRACK mode. May
be caused by extreme wind and current or too low boat
speed.
Drive inhibit A
Motor or solenoid drive
electronics critically
overloaded
Check for wire shortage, eventually disconnect suspicious
wires.
Drive not available A
No drive available response
upon request from autopilot
on Handshake port of faulty
SD80/AD80 board
Check that steering gear/thruster is set for autopilot
control.
Check cabling to Handshake port of faulty SD80/AD80
board.
Make sure Handshake port of faulty SD80/AD80 board is
configuration for HS fixed/HS pulse (refer “Configuring the
handshake” on page 60.
Drive reference
voltage missing
A
Reference voltage to faulty
AD80 is missing
Check that the two U_CTRL dip switches of faulty AD80
board is set correctly (ref. cable connection label inside
faulty unit).
If drive control signal is 4-20 mA current or voltage using
internal ±10 V reference, switches must be set to INT. If
external ref. voltage is connected switches must be set to
EXT.
If ext. ref. voltage, check cabling and measure correct
voltage between U_REF+ and U_REF of AD80 board
Drive unit failure W/A
Autopilot computer has lost
communication with faulty
device
Check that green CPU led of faulty unit is alternating (ref.
label inside unit cover for location of led). If off , check local
power supply/fuse (AC70). For other boards, check CAN
supply for 9-15 V between NETS and NETC of SimNet
plug. If led is ok, check cabling, T-connector backbone etc.
If led is on, try to restart unit by turning power off/on

Simrad AP80 Specifications

General

Brand	Simrad
Model	AP80
Category	Marine Equipment
Language	English