Electronic Modular Control Panel II (EMCP II) For PEEC Engines Caterpillar

Illustration 1	g00598412
Schematic For Emergency Stop Circuit

In order to find the cause of an emergency stop shutdown, perform this procedure.

1. Check the ESPB.

   1. Deactivate the ESPB by pulling the button. Some versions of ESPB must be turned clockwise before popping out.

   2. Turn the ECS to the OFF/RESET position and then turn the ECS to the STOP position.

      Expected Result: The ESPB should pop out. The indicator for emergency stop should be OFF.

      Results:

      • OK - The system is operating correctly. The problem may be intermittent. Check the harness and all the electrical connections of the circuit for the ESPB. See Testing And Adjusting, "Electrical Connector - Inspect". STOP.

      • Not OK - The ESPB does not pop out, then replace the ESPB. STOP.

      • Not OK - The ESPB pops out and the emergency stop indicator is FLASHING. Proceed to 2.

2. Check the indicator for the emergency stop.

   Note: This step creates diagnostic codes. Clear these created diagnostic codes after troubleshooting is complete.

   1. The ECS remains in the STOP position.

   2. Disconnect the harness connector from the GSC.

   3. Temporarily install a jumper from contact 39 of the GSC to ground. This simulates the OFF/RESET position of the ECS.

   4. Check the operation of the indicator for the emergency stop.

      Expected Result: The indicator for the emergency stop should be OFF.

      Results:

      • OK - Therefore, the fault is with the ESPB or the related wiring. Troubleshoot the circuit. See the Generator Set Wiring Diagram in Testing And Adjusting, "Schematics and Wiring Diagrams". Repair faulty components or replace faulty components. Repair the wiring or replace the wiring, if necessary. STOP.

      • Not OK - The emergency stop indicator is FLASHING. Replace the GSC. See Testing And Adjusting, "EMCP Electronic Control (Generator Set) - Replace".