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
138 A062J683 (Issue 1)Copyright © 2019 Cummins Inc.
FIGURE 69. FUSE LOCATION
1. Remove utility power from the utility-power battery charger.
2. Attach a DC voltmeter to the battery and record the battery voltage while the
generator set is not running.
3. Open the generator set's AC output breaker to prevent the ATS from
transferring to generator set power.
4. Manually start the generator set.
5. Record the battery voltage with the generator set running.
6. Determine whether the running voltage is above or below the non-running
voltage recorded in step 2.
• If the DC voltage is higher than 14.3 VDC, verify that the supply voltage to
the regulator is 50 ±5 VAC.
◦ If the supply voltage is 50 ± 5 VAC, replace the voltage regulator.
• If the running voltage is at or the below non-running voltage:
a. Shut off the generator set and verify that the flywheel charger’s 20
Amp in-line fuse is not open. It is located near the engine starter.
b. If the fuse is not blown, attach an ammeter to the red, fused output
lead of the flywheel charger voltage regulator.
7. Restart the generator set.
8. Confirm that the charger output is positive but under 9 Amps whenever battery
voltage is less than 13.8 ±0.5 VDC.
a. If the charger output is positive and under 9 Amps whenever battery
voltage is less than 13.8 ±0.5 VDC, no further action needs to be taken.