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
146 A062J683 (Issue 1)Copyright © 2019 Cummins Inc.
5. Verify engine battery charger is functioning correctly. Measure battery voltage
and check for voltage increase while the generator set is running.
No AC Power but Generator Set Is Running
Logic: There is no AC power to the connected loads but the generator set is
running
Possible Causes:
• The generator set circuit breaker has tripped due to an overload or short or was
turned off
• The ATS failed to transfer to the generator set source
Diagnosis and Repair:
1. Measure AC voltage at the generator set side of the circuit breaker.
• If the AC voltage is not between 230 and 240 VAC, navigate to the No AC
Power but Generator Set Is Running fault in the control display for
diagnostics.
• If AC is available, and the breaker is on, verify AC voltage on the load side
of the breaker. If there is no AC voltage, replace the breaker.
2. Measure the AC output at the generator set circuit breaker.
• Reset or turn on the generator set circuit breaker.
• Diagnose faulty loads as necessary.
3. Verify the transfer command is being sent to the ATS at customer connection
TB5 (ATS control). Refer to the ATS owner manual if the ATS failed to transfer.
7.12 Troubleshooting with Fault Codes
Fault Code Introduction
Fault code information, together with warning and shutdown information, is provided
in this section to assist in locating and identifying the possible causes of faults in the
generator set system.
Refer also to the engine-specific operator manual, if it exists. The engine operator
manual contains additional information regarding the running and care of the
generator set as well as specific equipment instructions that may differ from the
standard generator set.
For any fault codes that occur but are not listed, contact your Cummins service
representative.
Code 2 - Low Oil Pressure Fault
Logic: Continuous ground (greater than or equal to 3 seconds) at the generator set
control for oil pressure input. The switch opens the control circuit with pressure.