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
142 A062J683 (Issue 1)Copyright © 2019 Cummins Inc.
7.11 Troubleshooting by Symptom
Generator Set Starts when Utility Power Is Available - No
Fault Code
Logic: To start - the generator set control receives ground at start input on the
generator set control board with Standby enabled, or from a remote display or
monitoring system (web page or phone app) with Remote enabled.
Possible Causes:
• Shorted harness connection
• Faulty ATS signal or relay and "Standby" is enabled
• Remote enabled and start command sent from remote device (display, web
page, phone app)
Diagnosis and Repair:
1. If Remote is enabled, a remote start signal may come from the remote
monitoring system (website or phone app) or remote display. Discuss this with
the customer to ensure this functionality is understood.
2. Disconnect the ATS start signal at customer connection TB6 (Remote Start
Input).
3. Measure for continuity to GND of both TB6 and customer wiring.
4. If present, inspect the wiring from the ATS for a short to GND and refer to the
appropriate RA series ATS owner manual for diagnosis of the ATS.
5. If there is continuity of TB6 to GND, locate the short to ground in the harness,
and repair or replace the harness.
Generator Set Stops without Command - No Fault Code
Logic: The generator set control receives a stop signal at the generator set control
board.
Possible Causes:
• Loss of the Remote Start command
• A remote stop command from a remote monitoring device
• Low battery voltage
Diagnosis and Repair:
1. Check the last fault recorded.
a. If this fault has not been repaired, troubleshoot that fault.
b. If the fault has been repaired, continue the diagnosis.
2. A remote stop signal may come from the Remote Monitoring System (website
or phone app) or remote display. Discuss this with the customer to ensure this
functionality is understood.