Raymarine Evolution EV-2, Installation Instructions Manual

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4.5 Alarms
Alarms are raised by the autopilot system to alert you to mechanical and electrical conditions requiring your attention.
The Evolution components transmit alarm alerts on the SeaTalk ng network for display on autopilot control heads and multifunction
displays, along with an audible alert. The Evolution components stop raising an alarm when the alarm condition ceases or the
alarm is acknowledged on the autopilot control head or multifunction display. If the alarm is safety-critical it will be raised again
after a timed delay.
Unless otherwise stated in the table below, you should respond to alarms by selecting OK or Acknowledge on your autopilot
control head or multifunction display.
Alarm Message Possible causes Solution
OFF COURSE Autopilot has deviated from planned course. Check your vessel position and if necessary take
manual control to steer the vessel back on course.
WIND SHIFT Autopilot is unable to maintain navigation to the
current wind angle.
LOW BATTERY Power supply voltage has dropped below
acceptable limits. Caused by low battery voltage
or voltage drop at the ACU unit (EV-1 systems
only), due to poor connections or inadequate
wiring. Acknowledge the alarm and then start the engine
to recharge the battery. If problem persists, check
wiring connections and that the quality and gauge
of wiring is adequate for the current draw of the
drive unit.
LARGE XTE Large cross-track error. The autopilot has deviated
more than expected from a planned course. Check your vessel position and if necessary take
manual control to steer the vessel back on course.
CU DISCONNECTED The autopilot control head has been disconnected. • Check the physical cables and connections
between the autopilot control head and the
SeaTalk
ng system. Also between the EV-1 /
EV-2 and the SeaTalk ng system.
• If the autopilot control head is connected via
a SeaTalk to SeaTalk ng converter, check the
converter is using the latest software version.
AUTO RELEASE Possible fault with rudder reference unit.
Alternatively, if your autopilot system includes a
stern I/O drive, you have taken manual control of
the steering while the pilot is in Auto mode. • Check rudder reference unit connections.
• For systems using the Volvo Penta EVC drive
interface unit, check the unit is operating
correctly.
WAYPOINT ADVANCE The autopilot has steered the vessel to the current
waypoint. Acknowledge the turn to the next waypoint.
DRIVE STOPPED • Motor / steering has not moved within 20
seconds of a course change command.
• The autopilot is unable to turn the rudder
(either because the weather load on the helm
is too high, or if the rudder position sensor
has passed beyond the preset rudder limits or
rudder end-stops.
• Autopilot resets due to an external event (such
as use of the sleep switch, or faulty wiring
causing the autopilot components to power
cycle).
• Autopilot resets due to software error.
• Check the rudder reference unit has been
installed correctly to reflect the limits and
end-stops of the vessel’s rudder system.
• For EV-1 systems, check ACU drive output
voltage and drive and clutch voltage output (if
applicable).
• For EV-1 systems, check all connections to
ACU.
• Check all connections to drive unit.
• Check that the drive unit operates and is not
stalled.
• Check steering system is secure.
NO RUDDER REFERENCE No rudder reference unit is detected, or the rudder
reference unit has turned outside its operational
range (50 degrees). If a rudder reference unit is installed, check the
wiring. Inspect the unit for possible damage.
STALL DETECTED Motor speed dropped too low for given course
change or motor stalling. This can be caused by a
faulty drive unit or steering fault. Alternatively, the
steering hard-over time may be too slow. • Check that the drive unit operates and is not
stalled.
• Check the steering hard-over time.
CLUTCH OVERLOAD The clutch for the drive system is demanding a
greater power output than is supported by the
clutch power output of the Evolution components. Refer to the clutch power output ratings provided
in the Installation instructions for the relevant
Evolution components, and ensure the clutch for
the drive unit does not exceed this power output.
CURRENT OVERLOAD Serious drive failure; the drive is demanding too
much electrical current due to short-circuit or
jamming. Caused by a faulty drive unit or motor,
or wiring short-circuit. Alternatively, a fault in the
steering system may be causing the drive unit to
lock-up. Check the drive unit.
ROUTE COMPLETE Your vessel has arrived at the end of the current
route. No action required.
30 Evolution EV-2