Installation Checkout Procedure - Woodward 723PLUS Technical Manual

723PLUS Digital Marine Control
FAILED SPD SENSOR #1 and #2 LEDs
The FAILED SPD SENSOR #1 and #2 LEDs are red. The FAILED SPD
SENSOR LEDs are programmed to illuminate if a speed sensor fault has been
detected. FAILED SPD SENSOR #1 illuminates LED #1 when a speed sensor 1
fault has been detected, and FAILED SPD SENSOR #2 illuminates LED #2 when
a speed sensor 2 fault has been detected. The speed sensor fault is activated if
the sensed speed is below the failsafe speed setting. See Chapter 6, Faults and
Troubleshooting, for additional speed sensing fault details.
LED #3 and LED #4
The LED #3 and LED #4 are yellow. The LED #3 is programmed to illuminate
and flash if the Control LON network addresses for channels 1 and 2 are either
not set or improperly set. Control LON cannot function until properly addressed.
The LED #4 is programmed to illuminate if both Control LON networks 1 and 2
are failed. Alarm conditions must be corrected to extinguish LED #3 and LED #4.

Installation Checkout Procedure

With the installation complete as described in this chapter, do the following
checkout procedure before beginning set point entry (Chapter 4) or initial start-up
adjustments (Chapter 5).
1. Visual inspection
A. Check the linkage between the actuator and fuel-metering device for
looseness or binding. Refer to the appropriate actuator manual, and
Manual 25070, Electronic Control Installation Guide, for additional
information on linkage.
To prevent possible serious injury from an overspeeding engine, the
actuator lever or stroke should be near but not at the minimum
position when the fuel rack is at the minimum fuel delivery position.
B. Check for correct wiring in accordance with the control wiring diagram,
Figure 1-4.
C. Check for broken terminals and loose terminal screws.
D. Check the speed sensor(s) for visible damage. If the sensor is a
magnetic pickup, check the clearance between the gear and the
sensor, and adjust if necessary. Clearance should be between 0.25
and 1.25 mm (0.010 and 0.050 inch) at the closest point. Make sure the
gear run out does not exceed the pickup gap.
The smallest practical gap is preferred; typically smaller gaps can be
set on smaller gears and larger gaps on larger gears.
2. Check for grounds
Check for grounds by measuring the resistance from all control terminals to
chassis. All terminals except terminals 2 and 37 should measure infinite
resistance (the resistance of terminals 2 and 37 depends on whether a
floating or grounded power source is used). If a resistance less than infinite
is obtained, remove the connections from each terminal one at a time until
the resistance is infinite. Check the line that was removed last to locate and
repair the ground fault.
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Manual 26482
Woodward