ALC-1D or -2D Display Settings and Operation
Automatic Control Setting and Operation:
After the installation, calibration and verification have been completed, take the boat for a test drive and
store the correct level or attitude as described below.
1.
Operate the boat at a typical cruising speed (not maximum speed). Manually adjust the trim tabs until
the desired boat level or attitude is attained.
2.
Once the proper attitude is achieved, at a typical cruising speed, press and hold the AUTO button for 4
seconds. The indicator LED to the left of the AUTO text is lit, and the auto leveling control is set in
automatic mode. Now, the desired attitude is stored in permanent
memory. Allow the ALC 15 seconds or
more to sense the boat level and then begin automatic adjustments.
3.
Fine Adjustment:
In AUTO mode, the desired attitude can be fine tuned by pressing any of the four
buttons. Pressing the “Starboard Down” button once sets the boat .5 degrees to starboard. Pressing the
top “Bow Down” button once sets the bow down .5 degrees and so on as the other buttons are pressed.
Once the fine adjustments are complete, press and hold the AUTO button for 4 seconds to set into
permanent memory to overwrite the previous setting.
4.
As the boat is operated at slower speeds or turned, the automatic control is suspended, and the AUTO
indicator begins blinking. The auto function is temporarily interrupted to avoid deploying the tabs at
slow speeds or in turns. ALC reverts back to AUTO mode at speeds above planing and once a turn is
completed.
5.
Press the AUTO button to switch between Automatic and Manual modes.
6.
Display Shut Down:
When the boat is stopped and not in use for a couple minutes, the ALC will
automatically shut down to minimize the current draw from the battery to prevent depleting the boat’s
battery.
7.
Automatic Tab Retraction:
The trim tabs will automatically retract when the ignition key is switched off
or accessory switch is switched off to automatically retract the tabs. The red wire from the ALC keypad
must be connected to the ignition key run position or accessory switch.
Adjusting Gain:
1.
The gain determines how fast the auto leveling control corrects a list condition. It can be adjusted in
three steps. As a rule of thumb, boats longer than 35 feet may use setting 1 or 2 while boats below 35
feet may use settings 2 or 3 (setting 1 (top LED) = slower response, Setting 2 (middle LED) = medium,
setting 3 (bottom LED) = fast response).
2.
Adjust the gain by pressing and holding the Port button (left) and Starboard button (right) for 4 seconds
until one of the Gain indicators (middle 3 LEDs) begin flashing.
3.
Press the top “Bow Down” or bottom “Bow Up” to adjust the setting.
4.
The 3 LED indicators at the bottom middle show the 3 gain settings starting with gain setting #1 on top,
#2 in the middle and gain setting #3 on the bottom. (setting 1 (top LED) = slower response, Setting 2
(middle LED) = medium, setting 3 (bottom LED) = fast response).
5.
Now press the left “Port” and right “Starboard” buttons at the same time for 4 seconds to store this
setting in permanent memory.
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