LINK (ROLLER) 5B6379 - Caterpillar

System Operation Description:The OCP monitors internal battery supply voltage based on the +BATT and –BATT voltage inputs to the OCP control. If the battery voltage rises above the "High Battery Voltage Event Threshold" setpoint value, the high battery voltage event timer will begin timing. When the high battery voltage timer expires, the high battery voltage event is made active. This event occurs if the battery voltage has been above the event threshold level continuously while timing. If the battery voltage drops below the high battery voltage warning threshold, the high battery voltage event will be made inactive. The timer will be reset. If a battery overvoltage condition is detected, "HIGH BATTERY VOLTAGE SHUTDOWN" or "HIGH BATTERY VOLTAGE " will be displayed on the OCP in order to inform the operator of a high battery voltage condition.If the battery voltage drops below the "Low Battery Voltage Warning" threshold setpoint value, the low battery voltage event timer will begin timing. When the low battery voltage event timer expires, the low battery voltage event is made active. This event occurs if the battery voltage has been below the event threshold level continuously while timing. If the battery voltage rises above the low battery voltage event threshold, the low battery voltage event will be made inactive. The timer will be reset.If a battery undervoltage condition is detected, "LOW BATTERY CHARGING SYS VOLT WARN" or "LOW BATTERY VOLTAGE " will be displayed on the OCP in order to inform the operator of an undervoltage condition.Note: The severity of the battery over/under voltage condition will determine if a warning or shutdown event occurs.Conditions Which Generate This Code:This code is generated when the measured battery voltage value goes above or below the programmed thresholds for a configurable duration.Test Step 1. PERFORM THE INITIAL CHECK
The battery and charging system are located on the engine. Use the Caterpillar Electronic Technician (Cat ET) in order to check for active diagnostic codes on the engine ECM. If any codes are present, correct the engine diagnostic codes first. Expected Result:No other diagnostic codes or indicators are active on the engine ECM.Results:
OK - No other diagnostic codes or indicators are active. 2
NOT OK - Another engine ECM diagnostic code is active.Repair: Exit this procedure. Troubleshoot the active code or indicator. Refer to the engine Troubleshooting manual for your particular genset.STOPTest Step 2. CHECK THE SETPOINTS
View the "Battery Voltage Monitor" setpoints. Make a note of the setpoints. See Testing and Adjusting, "Electronic Control Module (ECM) - Configure". Compare the setpoints against the default setpoints of the particular generator set. Expected Result:The setpoints are correct.Results:
OK - The setpoints are correct for your particular genset. Proceed to test step 3
NOT OK - The setpoints are NOT correct.Repair: Reprogram the setpoints. Reset the engine. Resume normal operation and verify that the problem has been corrected.STOPTest Step 3. COMPARE ACTUAL BATTERY VOLTAGE TO THE VOLTAGE DISPLAYED ON THE OCP DISPLAY
Shut down the engine.
Disconnect the harness connector from the OCP.
At the harness connector, measure the battery voltage