Service Manual
Table Of Contents
- Table of Contents
- 1. IMPORTANT SAFETY INSTRUCTIONS
- 1.1 Warning, Caution, and Note Styles Used in This Manual
- 1.2 General Information
- 1.3 Generator Set Safety Code
- 1.4 Electrical Shocks and Arc Flashes Can Cause Severe Personal Injury or Death
- 1.5 Fuel and Fumes Are Flammable
- 1.6 Exhaust Gases Are Deadly
- 1.7 The Hazards of Carbon Monoxide
- 1.8 Earth Ground Connection
- 2. Introduction
- 3. Startup
- 4. Operation
- 5. Maintenance
- 5.1 Maintenance Safety
- 5.2 Periodic Maintenance
- 5.3 Engine Oil
- 5.4 Engine Valve Clearance
- 5.5 Normal Duty Air Cleaner Element Replacement
- 5.6 Exhaust System Maintenance
- 5.7 DC Electrical System
- 5.8 Batteries
- 5.9 Spark Plugs
- 5.10 Cleaning the Generator Set Housing
- 5.11 Cleaning the Slip Rings
- 5.12 Exercising the Generator Set
- 5.13 Complete System Test
- 6. Service
- 7. Troubleshooting
- 7.1 Troubleshooting Procedures
- 7.2 Safety Considerations
- 7.3 GATRR Troubleshooting Approach
- 7.4 Tools and Parts Required
- 7.5 Troubleshooting with the Local or Remote Displays
- 7.6 Utility-Powered Battery Charger Troubleshooting
- 7.7 Engine Flywheel Battery Charger Troubleshooting
- 7.8 Fuel Shutoff Solenoid Valve
- 7.9 Compression Test Procedure
- 7.10 Connecting with the InPower Service Tool
- 7.11 Troubleshooting by Symptom
- 7.12 Troubleshooting with Fault Codes
- 7.13 Remote Monitoring Communication Troubleshooting
- Appendix A. Wiring Diagrams
7. Troubleshooting 10-2019
132 A062J683 (Issue 1)Copyright © 2019 Cummins Inc.
WARNING
Combustible Gases
Ignition of battery gases is a fire and explosion hazard which can cause
severe personal injury or death.
Do not smoke, or switch the trouble light ON or OFF near a battery. Touch a
grounded metal surface first before touching batteries to discharge static
electricity. Stop the generator set and disconnect the battery charger before
disconnecting battery cables. Using an insulated wrench, disconnect the
negative (–) cable first and reconnect it last.
WARNING
Automated Machinery
Accidental or remote starting of the generator set can cause severe personal
injury or death.
Isolate all auxiliary supplies and use an insulated wrench to disconnect the
starting battery cables (negative [–] first).
Only trained and experienced service personnel with knowledge of fuels, electricity,
and machinery hazards should perform service procedures. Review the safety
precautions in the Important Safety Instructions section.
High voltages are present when the generator set is running. Do not open the
generator set enclosure while the generator set is running.
NOTICE
Disconnect the battery charger from the AC source before disconnecting the
battery cables. Otherwise, disconnecting cables can result in voltage spikes
damaging the generator set control.
When troubleshooting a generator set, do the following to prevent an accidental
restart:
1. Make sure the generator set is not in Remote or Standby mode.
2. Turn off or remove AC power from the battery charger.
3. Using an insulated wrench, remove the negative (−) battery cable from the
generator set starting battery.
7.3 GATRR Troubleshooting Approach
Cummins recommends the GATRR (Gather, Analyze, Test, Repair, Retest)
troubleshooting approach.