Generac Generator Fault Codes
Owning a Generac generator provides peace of mind during power outages or in off-grid situations. However, like any complex machinery, generators can encounter issues that require attention. One valuable tool in troubleshooting and diagnosing problems is understanding the Generac generator faults is that generators generate, fault codes are valuable indicators that help identify specific issues and guide users towards appropriate solutions. We will provide a comprehensive list of Generac generator fault codes, accompanied by their corresponding warning or shutdown conditions. By familiarizing yourself with these fault codes, you can gain insights into potential problems and take necessary steps to address them promptly.
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| Code | Warning/Shutdown | Condition | Potential Causes | Recommended Troubleshooting | Check |
|---|---|---|---|---|---|
| 1100 | Warning | Low battery voltage. Battery voltage drops below acceptable levels. | Weak or discharged battery | Check battery voltage and condition | Check battery voltage and condition |
| 1101 | Warning | Battery charger fault. The battery charger is not functioning properly. | Faulty battery charger | Check battery charger operation | Check battery charger operation |
| 1200 | Shutdown | Low oil pressure. Engine oil pressure drops below safe operating levels. | Insufficient oil level | Check oil level and add oil if necessary | Check oil level and add oil if necessary |
| 1205 | Alarm | Instantaneous overspeed (Hz is over set threshold). | Stepper/mixer problems | Inspect and repair stepper motor or mixer assembly | Check engine speed and rectify if necessary |
| 1207 | Alarm | Backup overspeed alarm. Monitors the zero cross timing of the AVR. | Faulty excitation winding, zero cross circuit, loose wiring, or field boost hardware problem | Inspect and repair the AVR and associated circuits | Check alternator frequency and correct issues |
| 1210 | Shutdown | Overcrank. Engine fails to start after several attempts. | Fuel supply issues or other starting problems | Check fuel supply, spark plug, and starting system | Check fuel supply, spark plug, and starting system |
| 1300 | Warning/Alarm | Overvoltage / Low Oil Pressure | Faulty voltage regulation or voltage sensing circuit / Low oil or oil pressure issue | Contact service for voltage issues / Check oil level and pressure | Contact service for voltage issues / Check oil level and pressure |
| 1400 | Alarm | High engine temperature. | Overheating engine or cooling system issues | Check cooling system and ensure proper airflow | Check cooling system and airflow |
| 1500 | Shutdown | Overspeed. Engine speed exceeds safe operating limits. | Engine governor or speed sensing issues | Contact service for speed control issues | Contact service for speed control issues |
| 1501 | Alarm | RPM Sensor Loss for a 2 cylinder unit already running. | Fuel issue, LP tank empty, ignition coils damaged, or engine overloaded | Check fuel, ignition coils, and engine load | Check fuel, ignition coils, and engine load |
| 1505 | Alarm | RPM Sensor Loss for a 2 cylinder unit cranking. | Dead/bad battery, bad starter or wiring, or ignition coil problems | Check battery, starter, wiring, and ignition coils | Check battery, starter, wiring, and ignition coils |
| 1511 | Alarm | RPM Sensor Loss for a single cylinder unit already running. | Fuel issue, LP tank empty, ignition coil damaged, or engine overloaded | Check fuel, ignition coil, and engine load | Check fuel, ignition coil, and engine load |
| 1515 | Alarm | RPM Sensor Loss for a single cylinder unit cranking. | Dead/bad battery, bad starter or wiring, or ignition coil problems | Check battery, starter, wiring, and ignition coil | Check battery, starter, wiring, and ignition coil |
| 1600 | Shutdown/Alarm | Internal fault / Underspeed | Internal component failure or wiring issues / Overloaded or throttle control problem | Contact service for internal faults / Check load and throttle control | Contact service for internal faults / Check load and throttle control |
| 1603 | Alarm | Engine never reached rated 3600 RPM speed during startup. | Stepper motor or fuel system problem, incorrect fuel selector setting | Check stepper motor, fuel system, and fuel selector | Check engine RPM and correct issues |
| 1610 | Shutdown | Overcurrent. Generator output current exceeds safe operating levels. | Overloaded circuit or faulty electrical connections | Reduce load and check electrical connections | Reduce load and check electrical connections |
| 1620 | Warning | Underfrequency. Generator output frequency drops below acceptable levels. | Engine or governor issues | Contact service for frequency control issues | Contact service for frequency control issues |
| 1630 | Warning | Over frequency. Generator output frequency exceeds acceptable levels. | Engine or governor issues | Contact service for frequency control issues | Contact service for frequency control issues |
| 1710 | Warning | Overload. Generator output load exceeds safe operating levels. | Excessive load on the generator or faulty sensing circuit | Reduce load and check sensing circuit | Reduce load and check sensing circuit |
| 1800 | Alarm | Overvoltage for a prolonged period. | Bad AVR (automatic voltage regulator) | Conduct a voltage test and repair/replace AVR if necessary | Conduct a voltage test and correct overvoltage issue |
| 1900 | Alarm | Undervoltage. Output voltage is below 80% of rated output for 10+ seconds. | Frost/debris on slip rings, stator or rotor problem, brush problem, overloaded unit, wiring issues | Check engine functions and voltage, update firmware if needed | Check engine functions and voltage, update firmware if needed |
| 1901 | Alarm | Sudden drop in voltage. | Stall condition, possibly fuel related, stator or rotor problem, brush problem, overloaded unit, wiring issues | Check engine functions and voltage, update firmware if needed | Check engine functions and voltage, update firmware if needed |
| 1902 | Alarm | Both zero crosses are missing from the controller’s input for 1.5 seconds or more. | Faulty excitation winding, zero cross circuit, loose wiring, or field boost hardware problem | Check for faulty excitation winding, zero cross circuit, loose wiring, or field boost hardware issues | Inspect and correct zero cross circuit issues |
| 1906 | Alarm | One zero cross is missing for 1.5 sec. | See Undervoltage 1902 above for causes | See Undervoltage 1902 above for troubleshooting | Check for issues as per Undervoltage 1902 |
| 2099 | Alarm | Wiring Error | Miswired controller on customer side | Check high and low voltage wiring connections (194, 23, N1, N1 and T1) | Ensure correct wiring connections |
| 2100 | Alarm | Overload Remove Load | Unit is overloaded | Remove load, check CTs, install load shedding if necessary | Remove or shed load to prevent overload |
| 2102 | Alarm | Overload Remove Load (8 & 9kW units) | Re-cranks 5 times, engine stalls with low voltage | Inspect stepper motor, linkage, and check for fuel problems | Check for overload and ensure proper stepper motor function |
| 2103 | Alarm | Overload Remove Load (8 & 9kW units) | Unit attempted to run and accept load 10 times but failed due to overload | Check connected loads for overloading | Check and manage connected loads to prevent overload |
| 2299 | Alarm | Undervoltage Overload | Overloaded and attempted to start with a large load connected | Turn off main breaker while starting, then reconnect load once stable | Manage load during start-up to prevent undervoltage |
| 2399 | Alarm | Stepper Overcurrent | Current flow in stepper motor circuit above spec | Check stepper motor operation and coil resistances | Inspect stepper motor and circuits for overcurrent issues |
| 2400 | Alarm | Fuse Problem | Missing, blown, or damaged 7.5A ATO type fuse in controller | Replace fuse, upgrade firmware in controller to current version | Check and replace fuse, ensure firmware is up-to-date |
| 2800 | Alarm | Aux Shutdown (for units with external Auxiliary Shutdown switch) | Auxiliary Shutdown switch issue | Check switches and wiring if both are on | Inspect and correct any switch or wiring issues |
How Do I Clear Generac Generator Fault Codes
Generac generators are reliable power solutions that provide electricity during outages and ensure uninterrupted operations in various settings. However, encountering fault codes is not uncommon, as generators use these codes to communicate potential issues. Clearing these fault codes is essential for maintaining optimal generator performance and preventing recurring problems. In this article, we will guide you through the process of clearing Generac generator fault codes, allowing you to reset the system and resume smooth operation.
Understanding Generac Generator Fault Codes
Generac generators are equipped with advanced control systems that monitor various parameters, including voltage, frequency, temperature, and oil pressure. When the system detects abnormalities, it generates fault codes to pinpoint the specific issue. These codes can range from low battery voltage and overvoltage to high engine temperature or overspeed conditions. Clearing these fault codes after resolving the underlying problems is crucial for resetting the system and ensuring accurate monitoring of future events.
Steps to Clear Generac Generator Fault Codes
Identify the Fault Code:
The first step in clearing fault codes is to identify the specific code that is displayed on the generator’s control panel or digital interface. Refer to the generator’s manual or documentation to find the fault code list and determine the corresponding issue.
Resolve the Underlying Issue
Once you have identified the fault code, address the underlying issue that triggered the code. Depending on the fault code, the troubleshooting steps may vary. For example, if the fault code indicates low oil pressure, check the oil level and add oil if necessary. If it is an overvoltage code, verify the voltage regulation system or address any faulty connections.
Power Off the Generator
Before clearing the fault code, it is important to power off the generator to ensure a clean reset. Follow the manufacturer’s instructions to safely shut down the generator and disconnect it from any power sources.
Wait for a Few Minutes:
Allow the generator to sit idle for a few minutes after powering it off. This brief waiting period helps discharge any residual power and ensures a complete reset of the control system.
Access the Control Panel
Once the waiting period is over, access the generator’s control panel or digital interface. This is where you will navigate the menus and options to clear the fault code.
Navigate to the Fault Code Menu
Using the control panel or digital interface, locate the menu or section dedicated to fault codes. This menu provides options for viewing, clearing, or resetting the fault codes stored in the generator’s memory.
Clear the Fault Codes
Within the fault code menu, select the option to clear the fault codes. The interface will prompt for confirmation before proceeding with the clearance process. Confirm the action to clear the fault codes from the system.
Power On the Generator
After successfully clearing the fault codes, power on the generator and allow it to start up. The control system will reset, and the fault codes should no longer be present if the underlying issues have been resolved.
Monitor the Generator
Observe the generator’s operation and ensure that no new fault codes appear. If any new fault codes arise, consult the generator’s manual or contact a certified technician for further assistance.
Conclusion
Clearing Generac generator fault codes is an essential step in maintaining optimal performance and reliability. By following the steps outlined in this article, you can effectively clear fault codes and reset the generator’s control system after addressing the underlying issues. Regular monitoring and prompt resolution of fault codes contribute to the longevity and efficiency of your Generac generator, ensuring uninterrupted power supply when you need it the most.
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