TURBOCHARGER GROUP 4N8882 - Caterpillar

Illustration 1 g00487968
System Schematic For Generator Fault Relay (GFR)The GSC uses the generator fault relay (GFR) to activate the shunt trip coil of the optional circuit breaker during a shutdown fault. This circuit breaker takes the generator off the line during a shutdown fault. The GFR is located within the relay module. The optional circuit breaker is located in the generator housing and the shunt trip coil is located within the circuit breaker.Note: Whenever the GSC activates the GFR, "K2" is shown on the lower display. "K2" is also shown on the lower display when the GSC attempts to activate the GFR. When the GFR is not activated, "K2" is not shown.ProcedureThe possible cause of this diagnostic code is an open coil or a shorted coil of the GFR.The following response is the system response to this fault while the GFR is activated:
If a CID 442 occurs, then there is no effect on the system because the optional circuit breaker is already open. Also, the shutdown mode is functioning. The generator is already off the line.The following response is the system response to this fault while the GFR is not activated and a shutdown fault occurs:
If a CID 442 occurs, then the GFR cannot activate the shunt trip coil of the optional circuit breaker. The generator remains on-line.The GSC treats a CID 442 as an alarm fault. Active alarm faults are shown on the display when the alarm codes key is pressed. Also, the active alarm faults are shown when the ECS is in any position except the OFF/RESET position. Clear the diagnostic code from the fault log after troubleshooting is complete.
Check the status of the diagnostic code (Active/Inactive).
Turn