Product Manual

Table Of Contents
6. Troubleshooting 2-2016
86 A045R242 (Issue 7)Copyright © 2016 Cummins Inc.
Diagnosis and Repair:
1. Lubricating oil level is low
a. Check the oil level. Add oil, if necessary.
2. External leak
a. Inspect the engine and surrounding area for external oil leaks.
b. Contact your local dealer if a leak is present.
6.7 Code 421 - Engine Oil Temperature High
(Warning)
Logic:
The control has detected the engine oil temperature has exceeded the warning
threshold.
Possible Cause:
1. High ambient temperature
2. Enclosure air intake blocked
3. Coolant level is below specification
Diagnosis and Repair:
1. High ambient temperature
a. Reduce loads or recirculation of discharge air to generator in elevated
ambient.
2. Enclosure air intake blocked
a. Inspect for dirt, debris, or obstructions.
b. Remove blockage or snow/ice buildup as applicable.
3. Coolant level is below specification
a. Check coolant level.
b. Add coolant as necessary.
6.8 Code 441 - Battery Voltage Low (Warning)
Logic:
Battery voltage is low.
Possible Causes:
1. Loose or damaged battery cable connections
2. Battery charger not connected (if equipped)
3. Battery needs recharging