Marine Monitoring System II Caterpillar

Illustration 1	g00760293

1. Test the "POWER" light.

   1. Check the status of the "POWER" light.

   2. Make sure that "CB4" is turned ON.

   3. Test for voltage between the "+24VDC" terminal and the "-24VDC" terminal.

      The results of the preceding procedure are in the following list:

      • The "POWER" light is ON or 24 VDC is present. Proceed to test step 2.

      • 24 VDC is NOT present. Test the wiring in the power circuit. Repair damaged wiring or replace damaged wiring.

2. Test the "RUN" light.

   1. Check the status of the "RUN" light.

   2. Place "CB4" in the OFF position. Place "CB4" in the ON position.

   3. Disconnect all wires except for the "+24VDC" terminal and the "-24VDC" terminal.

   4. Cycle power by turning "CB4" OFF and ON.

      The results of the preceding procedure are in the following list:

      • The "RUN" light did NOT come ON. The speed switch is not correct. Replace the speed switch.

      • The "RUN" illuminated. Reconnect the wires one at a time. The light should go out. Repair the circuit that is associated with the wire that is connected when the light goes out.

3. Test the "Fault" light.

   1. Check the status of the "FAULT" light.

   2. Cycle power by turning "CB4" OFF and ON.

   3. Disconnect all wires from the input terminals and from the output terminals.

   4. Cycle power by turning "CB4" OFF and ON.

      The results of the preceding procedure are in the following list:

      • The "FAULT" light went out when the power was cycled for the first time. Proceed to the "Calibration Check" section.

      • The "FAULT" light went out when the power was cycled for the second time. Reconnect the wires one at a time. The light should come on. Repair the circuit that is associated with the wire that is connected when the light comes on.

4. Test the "SPEED SWITCH HEALTHY" light. The light is on output 5 of the engine speed switch.

   1. Cycle power by turning "CB4" OFF and ON.

      The results of the preceding procedure are in the following list:

      • The "SPEED SWITCH HEALTHY" light is ON. Proceed to the "Calibration Check" section.

      • The "SPEED SWITCH HEALTHY" light is BLINKING. Test the speed sensor. Refer to Testing and Adjusting, "Speed Sensor - Adjust".

      • The "SPEED SWITCH HEALTHY" light is OFF. The speed switch is not correct. Replace the speed switch.

Calibration Check

Note: The 163-0096 Diagnostic and Calibration Tool is recommended for this check. Refer to the "Owner's Manual" for more information. If the 163-0096 Diagnostic and Calibration Tool is not used, a signal generator that is capable of a 10 Volt peak square wave or a 3.5 Volt RMS sine wave must be used.

1. Place "CB1" and "CB4" in the OFFposition in order to remove power.

2. Disconnect the Input/Output for the active engine speed sensor.

3. Connect the positive lead of the signal generator to the input/output terminal and the negative lead of the signal generator to the DC Com terminal.

4. Turn ON "CB1" and "CB4".

5. Turn the engine control switch to the "Local" position.

6. Check the components that follow using table 1:
   • Crank Terminate Speed

   • Oil Step

   • Overspeed Setting

   Set the frequency generator to 10 Hz below the setpoint that is desired. The output for that setting should stay OFF. Change the setting to 10 Hz above the setpoint that is desired. The output for that setting should turn ON.

   Show/hide table

   Table 1

   Rated Speed	Crank Terminate Speed	Time Delay for Crank Terminate Speed	Oil Step	Overspeed
   720 RPM	723 Hz		2295 Hz	3458 Hz
   750 RPM	723 Hz		2391 Hz	3602 Hz
   900 RPM	723 Hz		2869 Hz	4322 Hz
   930 RPM	723 Hz		2964 Hz	4466 Hz
   1000 RPM	723 Hz		3188 Hz	4803 Hz
   1050 RPM	723 Hz		3347 Hz	5043 Hz
   Output lamp for the engine speed switch	O/1	O/2	O/3	O/0
   Output Relay	ECTR	ECTTDR	EOSTR	EOSSR

   Note: If the "Speed Switch Healthy" output on the engine speed switch "terminal 0/5" begins to flash during the procedure, the output can be reset by turning the engine control switch to the "Off/Reset" position.

   Note: Once the "Crank Terminate" output is activated, the output will stay on until the frequency of the signal generator is reduced to 0 Hz and two seconds pass.

   Note: The "Crank Terminate Time Delay" output activates after the "Crank Terminate" output activates. The time is 9 seconds, 15 seconds, or 18 seconds. The time depends on the settings of the "Crank Terminate Time Delay" jumper wires.

   Note: The "Oil Step" output activates after a 9 second delay after the frequency is set above the setpoint.

   Note: When the "Overspeed" output becomes active, the output stays active until the engine control switch is turned to the "Off/Reset" position.