STOP 3G2829 - Caterpillar

The setpoint for the system voltage (P007) specifies the battery voltage.24 - 24 Volt System32 - 32 Volt SystemNote: Note: The GSC+ does not receive battery power when the ECS is in the OFF/RESET position. When contact 6 is connected to one of the contacts (8, 9, 10), the GSC+ receives battery power when the ECS is in the OFF/RESET position.
Initial Procedure.Make sure that the CID 168 FMI 04 is shown on the display.
Enter service mode.
Turn the ECS to the STOP position.
Program setpoint P023 to 0. This programs the GSC+ for an MUI engine. This eliminates the engine electronic control module (ECM) as a possibility of the fault. For more information, see System Operation, "Protective Relaying Programming OP5-1".
Turn the ECS to the OFF/RESET position. Disconnect the jumper wire on the ECS that is between pin 6 and pin 9. Not all generators will have a jumper wire between pin 6 and pin 9. Proceed to Step 2.
Check the system's voltage.
Turn the ECS to the STOP.
Measure the voltage across the battery terminals.Expected Result: For a 24 volt system, the voltage should be between 24.8 DCV and 29.5 DCV. For 32 volt system, the voltage should be between 33.1 DCV and 39.3 DCV.Results:
OK: For a 24 volt system, the voltage should be from 24.8 DCV to 29.5 DCV. For a 32 volt system, the voltage should be from 33.1 DCV to 39.3 DCV. Proceed to Step 3.
NOT OK: For 24 volt systems, the voltage is not between 24.8 DCV to 29.5 DCV. For a 32 volt system, the voltage is not between 33.1 DCV to 39.3 DCV. The fault is in the charging system. Proceed to Testing and Adjusting, "Charging System - Test". STOP.
Compare the voltage between TS1-1 and the battery voltage.
Turn the ECS to the STOP position.
Measure the battery voltage across the terminals. Take note of the battery voltage.
Measure the voltage between TS1-1 and TS1-30. Take note of the voltage.
Compare the voltage from Step 3.b with the voltage that was noted in Step 3.c.Expected Result: The voltages that are measured in Step 3.b and Step 3.c are within