PUMP GP-FUEL INJECTION 5164624 - Caterpillar

If the frequency rises above the "Generator Over-frequency Percentage Threshold" set point value, then the over-frequency timer will begin timing. When the timer expires, the generator over-frequency event is made active (if the frequency has been above the threshold level continuously while timing). If the frequency rises above the generator over-frequency percentage threshold, then the generator over-frequency event will be made inactive and the timer will be reset. If an over-frequency condition is detected, then "GEN OVERFREQUENCY SHUTDOWN" or "GEN OVERFREQUENCY " will be displayed on the EMCP 4 in order to inform the operator of an overfrequency condition.Note: The severity of the over-frequency condition will determine if a warning or shutdown event occurs.Conditions Which Generate This Code:The code for generator over-frequency is generated when the EMCP 4 determines that a generator over-frequency condition has occurred. Test Step 1. TALK TO THE OPERATOR
Determine the conditions that caused the over-frequency condition. Expected Result:An over-frequency condition was caused by an occurrence that is known to the operator and the operator would like to put the genset back into service.Results:
OK - The operator can determine the cause for the over-frequency condition, the condition has been repaired, and the operator wants to put the genset back into service.Repair: Reset the generator set. Resume normal operation and verify that the problem has been corrected.The generator set operates normally.
NOT OK - The overfrequency condition was not caused by an occurrence known to the operator. Proceed to Test Step 2Test Step 2. CHECK THE SET POINTS.
View the generator over-frequency and generator desired engine speed request set points. Make a note of the set points. See Testing and Adjusting, "Electronic Control Module (Generator Set) - Configure". Compare the set points against the default set points of the particular generator set. Expected Result:The set points are correct.Results:
OK - The set points are correct for your particular genset. Proceed to Test Step 3 for EUI engines. Proceed to Test Step 4 for MUI engines
NOT OK - The set points are NOT correct.Repair: Reprogram the set points. Reset the genset. Resume normal operation and verify that the problem has been corrected.STOPTest Step 3. VERIFY FREQUENCY CAN BE VIEWED AND ADJUSTED FROM THE EMCP 4 (EUI ENGINES WHERE ADEM IS SET TO CAN)Verify that the generator output frequency can be viewed and adjusted from the EMCP 4 display screen.Expected