Engage output overload (W/A)
(Warning when current >3.5 A. Alarm when current > 5 A).
Bypass valve or clutch is drawing excessive current.
•
Ensure there is no shortage to ground or cabling damage
•
Disconnect cable from autopilot computer to motor, and make sure there is no alarm
when engaging FU or AUTO mode
EVC Com error (A)
Lost communication with EVC system (Volvo IPS and similar).
•
Check connection with EVC engine interface. For IPS, engine must be running
External mode illegal (A)
Signals to external mode input port on AD80/SD80 has illegal combination.
•
Check if alarm is given for a certain position of external mode selector
•
Check cabling to MODE SEL port on the AD80/SD80 board
High drive temp. (W/A)
(Warning if drive electronic temperature >80°C. Alarm if drive electronic temperature close to
120°C for more than 1 second).
•
Switch off autopilot
•
Check for backload in drive unit/steering system
•
Check that the autopilot computer specifications matches drive unit
High internal temp (W)
Internal temperature >75°C.
Low boat speed (W/A)
(Alarm when track steering, else warning if speed data is used for steering).
Speed below set limit for acceptable course keeping (in Work profile).
•
Switch to hand steering or adjust Work profile settings
Low CAN bus voltage (W)
CAN bus voltage < 9 V.
•
Check cable length, bus load and bus supply feeding point. If possible, check if fault
disappears by disconnecting some units
Low supply voltage (W)
Supply voltage <9.5 V.
•
Check battery/charger condition
•
Verify mains cable has correct gauge
Monitor compass missing (W)
No data from the selected monitor compass.
Nav data missing (W/A)
(Alarm if sensor data is used for steering. Warning if missing when starting NAV mode).
Navigation data from Plotter/ECS missing.
•
Check device list for valid navigation source
•
Try a new automatic source update
•
Check the Plotter/ECS and cable connections
New WP (A)
Nav mode only.
Course change from one leg to the next is exceeding set "Course change limit".
No rudder response (A)
No response to rudder command.
•
Check all connections
•
Check rudder feedback transmission link (not applicable for Virtual feedback installations)
•
Check drive unit motor/brushes
•
For SD80, check that port/stbd led is activated (ref label in cover for location
42
The alert system
| AP70 MK2 Operator Manual
