Simrad AP70 MK2, Руководство оператора

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Compass difference (W)
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 (W)
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)
(Alarm when track steering, else Warning).
XTD exceeds the set XTD limit in NAV 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 connectors and cables
Drive not available
No drive response when requested from autopilot on Handshake port on SD80/AD80 board.
• Check that steering gear/thruster is set for autopilot control
• Check cabling to Handshake port on SD80/AD80 board
• Make sure Handshake port on SD80/AD80 board is configured for HS fixed/HS pulse (refer
to the configuration section in the Installation manual).
Drive overload (W/A)
(Warning if motor/solenoid current > 30 A (AC70) or solenoid current >8 A (SD80). Alarm if
motor/solenoid current > 55 A (AC70) or solenoid current >9 A (SD80)).
Reversible motor: motor stalls or is overloaded. Solenoids: shortage to ground or cabling
damage.
• Fix possible mechanical blocking of rudder
• If heavy sea at high rudder angle, try to reduce boat speed or rudder angle by steering at
another heading
• Make sure there is no shortage to ground or cabling damage
• Disconnect cable from autopilot computer to motor, and make sure there is no alarm
when trying to run in NFU mode
Drive reference voltage missing (A)
Reference voltage to AD80 is missing.
• Check that the two U_CTRL dip switches on the 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 external reference voltage, check cabling and measure correct voltage between U_REF+
and U_REF- on AD80 board
Drive unit failure (W/A)
The autopilot computer has lost communication with device.
• Check that green CPU led on the AC70 is alternating (ref. label inside unit cover for
location of led)
- If off , check local power supply/fuse
• For AD80/SD80, 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
End of route (A)
Activated on the active control unit when an end route waypoint name has been received
from the Plotter/ECS.
The alert system | AP70 MK2 Operator Manual
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