Simrad AP70 Operation Manual page 41

Alarm/Warning Type
Drive not available A
Drive reference
A
voltage missing
Drive unit failure W/A
End of route A
W
ENGAGE output
overload
A
EVC comm. error A
External mode illegal A
High internal temp. W
W
High drive temp.
A
Low CAN bus
W
voltage
Low supply voltage W
Low boat speed W/A
Monitor compass
W
missing
Warning/Alarm condition
No drive available response
upon request from autopilot
on Handshake port of faulty
SD80/AD80 board
Reference voltage to faulty
AD80 is missing
Autopilot computer has lost
communication with faulty
device
Given if WP name = "End of
route"
Current > 3.5 A
Current > 5 A
Lost communication with EVC
system (Volvo IPS and similar).
Signals to external mode
input port of faulty SD80/
AD80 board has illegal
combination
>75°C
Drive electronic temperature
>80°C
Drive electronic temperature
close to critical for more than
1 s.
< 9 V
<10 V (12 V -15%)
Speed below set limit for
steering in Work profi le
Lost sensor data
The alarm system | AP70/AP80 Operator Manual
Possible cause and recommended action
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
confi guration for HS fi xed/HS pulse (refer "Confi guring the
handshake" on page 44.
Check that the two U_CTRL
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+
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
plug. If led is ok, check cabling, T-connector backbone etc.
If led is on, try to restart unit by turning power off /on
Warning given on the active control unit when a "END
ROUTE" waypoint name has been received from the
Plotter/ECS.
Bypass valve or clutch is drawing excessive current (>3,5 A).
Make sure there is no shortage to ground or cabling
damage, disconnect cable from AC70 to motor, and make
sure there is no alarm when engaging FU or Auto mode.
Check connection with EVC engine interface.
For IPS, engine must be running.
Check if alarm is given for a certain position of external
mode selector. Check cabling to
board
Excessive temperature in unit (>75°C).
Excessive temperature in Autopilot Computer drive
transistors (>80°C), possible long term overload.
1. Switch off autopilot
2. Check for backload in Drive unit/steering system.
3. Check that the autopilot computer specifi cations
matches Drive unit
Check cable length, bus load and bus supply feeding point.
If possible, check if fault disappears by disconnecting some
units
Mains voltage less than 10 Volts.
1. Check battery/charger condition
2. Verify mains cable has correct gauge
Speed below set limit for acceptable course keeping (in
Work profi le). Switch to hand steering or adjust Work profi le
settings.
No data from the selected monitor compass. (Warning
only.)
dip switches of faulty AD80
and U_REF- of AD80 board
NET-S and NET-C of SimNet
MODE SEL port of faulty
| 39