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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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CodeWarning/ShutdownConditionPotential CausesRecommended TroubleshootingCheck
1100WarningLow battery voltage. Battery voltage drops below acceptable levels.Weak or discharged batteryCheck battery voltage and conditionCheck battery voltage and condition
1101WarningBattery charger fault. The battery charger is not functioning properly.Faulty battery chargerCheck battery charger operationCheck battery charger operation
1200ShutdownLow oil pressure. Engine oil pressure drops below safe operating levels.Insufficient oil levelCheck oil level and add oil if necessaryCheck oil level and add oil if necessary
1205AlarmInstantaneous overspeed (Hz is over set threshold).Stepper/mixer problemsInspect and repair stepper motor or mixer assemblyCheck engine speed and rectify if necessary
1207AlarmBackup overspeed alarm. Monitors the zero cross timing of the AVR.Faulty excitation winding, zero cross circuit, loose wiring, or field boost hardware problemInspect and repair the AVR and associated circuitsCheck alternator frequency and correct issues
1210ShutdownOvercrank. Engine fails to start after several attempts.Fuel supply issues or other starting problemsCheck fuel supply, spark plug, and starting systemCheck fuel supply, spark plug, and starting system
1300Warning/AlarmOvervoltage / Low Oil PressureFaulty voltage regulation or voltage sensing circuit / Low oil or oil pressure issueContact service for voltage issues / Check oil level and pressureContact service for voltage issues / Check oil level and pressure
1400AlarmHigh engine temperature.Overheating engine or cooling system issuesCheck cooling system and ensure proper airflowCheck cooling system and airflow
1500ShutdownOverspeed. Engine speed exceeds safe operating limits.Engine governor or speed sensing issuesContact service for speed control issuesContact service for speed control issues
1501AlarmRPM Sensor Loss for a 2 cylinder unit already running.Fuel issue, LP tank empty, ignition coils damaged, or engine overloadedCheck fuel, ignition coils, and engine loadCheck fuel, ignition coils, and engine load
1505AlarmRPM Sensor Loss for a 2 cylinder unit cranking.Dead/bad battery, bad starter or wiring, or ignition coil problemsCheck battery, starter, wiring, and ignition coilsCheck battery, starter, wiring, and ignition coils
1511AlarmRPM Sensor Loss for a single cylinder unit already running.Fuel issue, LP tank empty, ignition coil damaged, or engine overloadedCheck fuel, ignition coil, and engine loadCheck fuel, ignition coil, and engine load
1515AlarmRPM Sensor Loss for a single cylinder unit cranking.Dead/bad battery, bad starter or wiring, or ignition coil problemsCheck battery, starter, wiring, and ignition coilCheck battery, starter, wiring, and ignition coil
1600Shutdown/AlarmInternal fault / UnderspeedInternal component failure or wiring issues / Overloaded or throttle control problemContact service for internal faults / Check load and throttle controlContact service for internal faults / Check load and throttle control
1603AlarmEngine never reached rated 3600 RPM speed during startup.Stepper motor or fuel system problem, incorrect fuel selector settingCheck stepper motor, fuel system, and fuel selectorCheck engine RPM and correct issues
1610ShutdownOvercurrent. Generator output current exceeds safe operating levels.Overloaded circuit or faulty electrical connectionsReduce load and check electrical connectionsReduce load and check electrical connections
1620WarningUnderfrequency. Generator output frequency drops below acceptable levels.Engine or governor issuesContact service for frequency control issuesContact service for frequency control issues
1630WarningOver frequency. Generator output frequency exceeds acceptable levels.Engine or governor issuesContact service for frequency control issuesContact service for frequency control issues
1710WarningOverload. Generator output load exceeds safe operating levels.Excessive load on the generator or faulty sensing circuitReduce load and check sensing circuitReduce load and check sensing circuit
1800AlarmOvervoltage for a prolonged period.Bad AVR (automatic voltage regulator)Conduct a voltage test and repair/replace AVR if necessaryConduct a voltage test and correct overvoltage issue
1900AlarmUndervoltage. 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 issuesCheck engine functions and voltage, update firmware if neededCheck engine functions and voltage, update firmware if needed
1901AlarmSudden drop in voltage.Stall condition, possibly fuel related, stator or rotor problem, brush problem, overloaded unit, wiring issuesCheck engine functions and voltage, update firmware if neededCheck engine functions and voltage, update firmware if needed
1902AlarmBoth 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 problemCheck for faulty excitation winding, zero cross circuit, loose wiring, or field boost hardware issuesInspect and correct zero cross circuit issues
1906AlarmOne zero cross is missing for 1.5 sec.See Undervoltage 1902 above for causesSee Undervoltage 1902 above for troubleshootingCheck for issues as per Undervoltage 1902
2099AlarmWiring ErrorMiswired controller on customer sideCheck high and low voltage wiring connections (194, 23, N1, N1 and T1)Ensure correct wiring connections
2100AlarmOverload Remove LoadUnit is overloadedRemove load, check CTs, install load shedding if necessaryRemove or shed load to prevent overload
2102AlarmOverload Remove Load (8 & 9kW units)Re-cranks 5 times, engine stalls with low voltageInspect stepper motor, linkage, and check for fuel problemsCheck for overload and ensure proper stepper motor function
2103AlarmOverload Remove Load (8 & 9kW units)Unit attempted to run and accept load 10 times but failed due to overloadCheck connected loads for overloadingCheck and manage connected loads to prevent overload
2299AlarmUndervoltage OverloadOverloaded and attempted to start with a large load connectedTurn off main breaker while starting, then reconnect load once stableManage load during start-up to prevent undervoltage
2399AlarmStepper OvercurrentCurrent flow in stepper motor circuit above specCheck stepper motor operation and coil resistancesInspect stepper motor and circuits for overcurrent issues
2400AlarmFuse ProblemMissing, blown, or damaged 7.5A ATO type fuse in controllerReplace fuse, upgrade firmware in controller to current versionCheck and replace fuse, ensure firmware is up-to-date
2800AlarmAux Shutdown (for units with external Auxiliary Shutdown switch)Auxiliary Shutdown switch issueCheck switches and wiring if both are onInspect 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.

GUARDIAN 26KW GENERATOR

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