Generac Generators

Understanding Generac Generator Fault Codes – A Handy Guide

Generac generator fault codes are crucial indicators that help diagnose and resolve issues with your generator. By understanding these fault codes, you can effectively troubleshoot any problems that arise and keep your Generac generator running smoothly. In this comprehensive guide, we will provide you with all the necessary information to understand and troubleshoot these codes, ensuring the longevity and efficiency of your generator.

Key Takeaways:

  • Familiarize yourself with the most common Generac generator fault codes and their meanings to easily identify and address specific issues.
  • The Overcrank (1100) fault code indicates an issue that needs troubleshooting and resolution to prevent further damage.
  • The Overspeed (1200/1205) fault code suggests a potential problem with the generator’s engine speed.
  • The Low Oil Pressure (1300) fault code indicates a drop in oil pressure, requiring immediate attention.
  • The RPM Sense Loss (1501/1505/1511/1515) fault codes signal a loss of RPM sensing and require troubleshooting to resolve the issue.
  • The Underspeed (1600) fault code points to your generator running at a lower speed than it should be.
  • The Undervoltage (1900) fault code indicates a drop in voltage supply that needs troubleshooting and rectification.
  • The Overload (2100) fault code suggests that your generator is experiencing excessive load, potentially exceeding its capacity.
  • The Low Battery fault code indicates that your generator’s battery requires attention and troubleshooting.
  • Clearing fault codes is an essential step after addressing the underlying issue in your Generac generator.

By following the guidelines in this guide, you’ll be well-equipped to diagnose, resolve, and clear fault codes, ensuring the smooth operation of your Generac generator. Regular monitoring and prompt action will contribute to the longevity and efficiency of your generator.

Common Generac Generator Fault Codes and Their Meanings

Generac generators may display various fault codes, each indicating a specific problem with the generator’s operation. Understanding these fault codes is essential for troubleshooting and diagnosing issues effectively. Here, we will discuss some of the most common Generac generator fault codes and their meanings.

1. Overcrank (1100) Fault Code: This fault code occurs when the generator’s engine fails to start after several attempts. It could be due to issues with low battery voltage, fuel supply, or a faulty starter. Ensure the battery is fully charged and the fuel supply is unrestricted to resolve this issue.

2. Overspeed (1200/1205) Fault Code: The overspeed fault code indicates that the generator’s engine is running at a higher speed than recommended. This can be caused by a malfunctioning governor or a problem with the engine’s RPM sensing system. Professional assistance may be required to diagnose and repair this issue.

3. Low Oil Pressure (1300) Fault Code: When this fault code appears, it means that the generator is experiencing a drop in oil pressure. This could be due to low oil levels, a faulty oil pressure sensor, or a clogged oil filter. Check the oil levels and inspect the sensor and filter to rectify the issue.

Fault Code Fault Meaning
1100 Overcrank
1200/1205 Overspeed
1300 Low Oil Pressure

By understanding these common Generac generator fault codes and their meanings, you can quickly identify the issue at hand and take appropriate action. However, it’s important to note that some fault codes may require professional assistance for proper diagnosis and resolution. Regular monitoring and prompt response to fault codes will ensure the longevity and efficient operation of your Generac generator.

Overcrank (1100) Fault Code

The Overcrank (1100) fault code is one of the most commonly reported issues in Generac generators. This fault code occurs when the generator fails to start after multiple attempts. It indicates a problem with the starting system, which could be caused by various factors such as a weak battery, faulty starter motor, or a clogged fuel system.

To troubleshoot and resolve the Overcrank fault, follow these steps:

  1. Check the battery voltage: Ensure that the battery is fully charged and has sufficient power to start the generator. If the battery is weak or discharged, try jump-starting the generator or replacing the battery.
  2. Inspect the starter motor: Examine the starter motor for any signs of damage or wear. If the motor is faulty, it may need to be repaired or replaced.
  3. Clean the fuel system: A clogged fuel system can prevent the generator from starting. Check the fuel filter and the fuel lines for any obstructions or debris. Clean or replace the fuel filter if necessary.
  4. Check the ignition system: Ensure that the spark plug is in good condition and properly connected. If the spark plug is damaged or worn out, replace it with a new one.

If the above troubleshooting steps do not resolve the Overcrank fault, it is recommended to contact a professional technician or Generac service center for further assistance. They will have the expertise and knowledge to diagnose the issue accurately and provide the necessary repairs.

Fault Code Meaning Troubleshooting Steps
Overcrank (1100) Generator fails to start after multiple attempts
  • Check battery voltage
  • Inspect starter motor
  • Clean fuel system
  • Check ignition system

Overspeed (1200/1205) Fault Code

The Overspeed (1200/1205) fault code signals an issue with the engine speed of your Generac generator. When this code is displayed, it indicates that the engine is running at a higher speed than it should be. This can lead to potential damage to the generator and other connected equipment, so it’s important to address this issue promptly.

There are a few possible causes for the Overspeed fault code. The first step in troubleshooting is to check the generator’s throttle control and ensure it is set at the correct position. A misadjusted throttle control can cause the engine to run at a higher speed than intended.

Another potential cause could be a malfunctioning engine control board or an issue with the speed sensor. These components are responsible for regulating the engine speed, and a fault in either of them can result in the Overspeed fault code. In such cases, it is recommended to consult a professional technician or contact Generac customer support for further assistance.

Possible Causes Troubleshooting Steps
Misadjusted throttle control Check and adjust the throttle control to the correct position.
Malfunctioning engine control board Contact a professional technician or Generac customer support for further assistance.
Issue with the speed sensor Consult a professional technician or contact Generac customer support for further assistance.

By promptly addressing the Overspeed fault code and resolving the underlying issue, you can ensure the proper functioning and longevity of your Generac generator. Regular maintenance and monitoring are also recommended to prevent any future occurrences of this fault code and to keep your generator running smoothly.

Low Oil Pressure (1300) Fault Code

When your Generac generator registers the Low Oil Pressure (1300) fault code, it indicates a potential drop in oil pressure, which requires attention. This fault code is a crucial indicator of a potential issue that needs to be resolved promptly to ensure the proper functioning of your generator.

Low oil pressure can result from various factors, including insufficient oil levels, a faulty oil pump, or a clogged oil filter. It’s important to address the underlying cause to prevent damage to your generator’s engine and ensure its longevity.

To troubleshoot and rectify the Low Oil Pressure fault code, follow these steps:

  1. First, ensure that the generator is turned off and the engine is cool.
  2. Check the oil level using the dipstick. If the oil level is low, add the recommended type and amount of oil.
  3. Inspect the oil filter for any signs of clogging or damage. If necessary, replace the oil filter with a new one.
  4. If the oil level and filter are in proper condition, it is advisable to consult a professional technician to inspect the oil pump and perform a thorough examination of the generator’s engine.

Regular maintenance and monitoring of your Generac generator’s oil level, filter, and pump will help prevent low oil pressure issues. Remember to consult the generator’s manual for specific maintenance guidelines and recommended oil types. By promptly addressing the Low Oil Pressure fault code, you can ensure the optimal performance and longevity of your Generac generator.

Fault Code Description
1300 Low Oil Pressure

RPM Sense Loss (1501/1505/1511/1515) Fault Code

When your Generac generator displays any of the RPM Sense Loss fault codes (1501/1505/1511/1515), it signifies a loss of RPM sensing, which may require troubleshooting. The RPM sensing system is responsible for monitoring the speed of the generator’s engine. When this system detects an inconsistency or interruption in the RPM data, it triggers the fault code and alerts you to a potential issue.

To diagnose and resolve the RPM Sense Loss fault code, follow these steps:

1. Check the Generator Connections

Start by examining the wiring connections between the generator and the control panel. Ensure that all connections are secure and not damaged. Loose or faulty connections can disrupt the RPM sensing system and trigger the fault code. Tighten or repair any connection that appears loose or damaged.

2. Inspect the RPM Sensor

The RPM sensor, also known as the speed sensor or pick-up coil, plays a crucial role in RPM sensing. It measures the rotations per minute of the generator’s engine and sends this information to the control panel. Check the RPM sensor for any signs of wear or damage, such as corrosion or frayed wires. If necessary, replace the RPM sensor following the manufacturer’s instructions.

3. Verify the Engine Speed

If the RPM Sense Loss fault code persists, verify the engine speed using a tachometer. Compare the actual speed with the generator’s specifications. If the engine speed deviates significantly from the specified range, it may indicate a mechanical issue that requires professional assistance. Contact a certified Generac technician to inspect and service the generator.

By addressing the RPM Sense Loss fault code promptly, you can maintain the optimal performance and reliability of your Generac generator.

Fault Code Description
1501 Loss of RPM sensing, temporary
1505 Loss of RPM sensing, intermittent signal
1511 Loss of RPM sensing, signal loss
1515 Loss of RPM sensing, no signal

Underspeed (1600) Fault Code

When your Generac generator shows the Underspeed (1600) fault code, it signifies that the generator is operating at a lower speed than optimal. This fault code can occur due to various reasons, including issues with the fuel supply, engine control module, or governor system.

To troubleshoot and resolve the Underspeed fault code, follow these steps:

  1. Check the fuel supply: Ensure that the generator has an adequate supply of clean fuel. Check for any clogs or blockages in the fuel lines, and ensure that the fuel filters are clean.
  2. Inspect the engine control module: If the fuel supply is not the issue, inspect the engine control module for any faults or malfunctions. Look for error codes or diagnostic readings that can provide further insights into the problem.
  3. Check the governor system: The governor system is responsible for regulating the generator’s speed. Inspect the governor linkage, flyweights, and springs for any signs of damage or misalignment. Adjust or replace any faulty components as necessary.

If the above steps do not resolve the Underspeed fault code, it is recommended to consult a professional technician who specializes in Generac generators. They will have the expertise and tools to diagnose and address the underlying issue effectively.

Fault Code Description
Underspeed (1600) The generator is operating at a lower speed than optimal.

Undervoltage (1900) Fault Code

The Undervoltage (1900) fault code in your Generac generator indicates a drop in voltage supply, which requires attention. This fault code typically occurs when the generator is not receiving the necessary voltage to operate properly. It can be caused by a variety of factors, including a faulty voltage regulator, a weak battery, or problems with the generator’s internal wiring.

To troubleshoot the Undervoltage fault code, you should start by checking the generator’s battery. Ensure that it is properly charged and functioning correctly. If the battery is weak or defective, it may not provide the necessary voltage to power the generator. In this case, replacing the battery should resolve the issue.

If the battery is not the problem, you may need to inspect the generator’s voltage regulator. This device regulates the voltage output of the generator and ensures a stable supply of power. A malfunctioning voltage regulator can cause the generator to produce insufficient voltage, triggering the Undervoltage fault code. If you suspect a faulty voltage regulator, it is recommended to consult a professional technician for further diagnosis and repair.

In some cases, the Undervoltage fault code may also be triggered by problems with the generator’s internal wiring. Loose or damaged wiring can disrupt the flow of electricity and result in a drop in voltage supply. Inspect the wiring connections and look for any signs of damage or looseness. If necessary, consult a qualified electrician to repair or replace the faulty wiring.

Fault Code Fault Description Troubleshooting Steps
Undervoltage (1900) Drop in voltage supply – Check the battery for proper charge and functionality.
– Inspect the voltage regulator for any malfunctions.
– Examine the generator’s internal wiring for loose or damaged connections.
– Consult a professional technician or electrician for further diagnosis and repair.

Regular monitoring and prompt resolution of fault codes, including the Undervoltage (1900) fault code, are crucial for maintaining the longevity and efficiency of Generac generators. Remember to follow the appropriate troubleshooting steps and seek professional assistance if necessary to ensure optimal performance and reliability.

Overload (2100) Fault Code

When your Generac generator displays the Overload (2100) fault code, it implies that the generator is operating under excessive load conditions. This can have various implications and can potentially exceed the generator’s capacity. It is important to address this issue promptly to prevent any damage to your generator and ensure its optimal performance.

To troubleshoot and resolve the Overload fault code, follow these steps:

  1. Identify the cause of the excessive load. Check if any appliances or equipment connected to the generator are drawing more power than the generator can handle.
  2. Remove some of the load by disconnecting non-essential appliances or equipment. This will help reduce the strain on the generator and prevent it from reaching its maximum capacity.
  3. If the fault code persists, consider redistributing the load by connecting certain appliances or equipment to a separate power source. This will help balance the power consumption and prevent overloading on a single generator.
  4. Regularly monitor the load on your generator and make sure it operates within its recommended limits to avoid future overload issues.

Remember, resolving the Overload fault code promptly is crucial to protect your Generac generator and prevent any potential damage. Regular maintenance and monitoring of the load will help ensure the longevity and efficiency of your generator.

Table 1: Troubleshooting Steps for Overload (2100) Fault Code

Steps Action
1 Identify the cause of excessive load.
2 Remove non-essential appliances or equipment.
3 Consider redistributing the load.
4 Monitor the load and ensure it stays within recommended limits.

Low Battery Fault Code

When your Generac generator registers the Low Battery fault code, it indicates that the generator’s battery is running low on power. This fault code is crucial to address promptly, as a weak battery can impact the overall performance and reliability of your generator. To resolve this issue, here are some troubleshooting tips:

  1. Start by checking the battery connections. Ensure they are secure and free from any corrosion or damage. If needed, clean the terminals and tighten them properly.
  2. Verify the battery voltage using a multimeter. A healthy battery should have a voltage reading within the manufacturer’s specified range. If the voltage is below the recommended level, you may need to recharge or replace the battery.
  3. Inspect the battery condition. Look for any signs of physical damage, leaks, or excessive wear. If the battery is visibly damaged or worn out, it is advisable to replace it with a new one.
  4. If the battery seems fine, but the fault code continues to appear, it could indicate an underlying issue with the generator’s charging system. In such cases, it is recommended to contact a qualified technician to diagnose and repair the problem.

Regular battery maintenance, including periodic inspection and testing, can help prevent the Low Battery fault code from occurring. It is also advisable to keep spare batteries on hand, especially during extended power outages or situations where the generator might be running for an extended period.

Common Causes of Low Battery Fault Code Troubleshooting Steps
Loose or corroded battery connections – Clean and tighten battery terminals
– Inspect cables for damage or wear
Weak or worn-out battery – Check battery voltage with a multimeter
– Recharge or replace the battery if necessary
Charging system malfunction – Contact a qualified technician for diagnosis and repair

Remember, addressing the Low Battery fault code promptly will help ensure your Generac generator remains in optimal working condition, delivering reliable power when you need it most.

Clearing Generac Fault Codes

Once you have resolved the specific issue causing the fault codes in your Generac generator, it is crucial to clear the codes to restore proper functionality. Clearing the fault codes will not only ensure that your generator operates smoothly but also helps in identifying any new issues that may arise. Here is a step-by-step guide on how to clear Generac fault codes:

  1. Power off the generator: First, turn off the generator to ensure the unit is safely shut down.
  2. Wait for a few minutes: Allow the generator to sit idle for a few minutes to ensure all electrical components have completely powered down.
  3. Access the control panel: Locate the control panel on your Generac generator and gain access to it.
  4. Navigate to the fault code menu: Use the controls or buttons on the control panel to navigate to the fault code menu. This menu will display the active fault codes.
  5. Clear the fault codes: Once you have reached the fault code menu, select the option to clear the fault codes. Follow the prompts on the control panel to confirm the action.

After clearing the fault codes, you can power on your Generac generator again and monitor its performance. If any new fault codes appear, consult the generator’s manual or seek professional assistance to diagnose and resolve the underlying issues. Regular monitoring and prompt resolution of fault codes are key to maintaining the longevity and efficiency of your Generac generator.

Fault Code Meaning
Overcrank (1100) Issue with generator cranking or starting process
Overspeed (1200/1205) Potential problem with the generator’s engine speed
Low Oil Pressure (1300) Drop in oil pressure
RPM Sense Loss (1501/1505/1511/1515) Loss of RPM sensing
Underspeed (1600) Generator running at a lower speed than intended
Undervoltage (1900) Drop in voltage supply
Overload (2100) Excessive load on the generator
Low Battery Generator battery running low on power

Conclusion

In conclusion, thorough knowledge of Generac generator fault codes empowers you to effectively diagnose and address issues, ensuring optimal performance and longevity of your generator. By understanding the meaning behind common fault codes such as Overcrank (1100), Overspeed (1200/1205), Low Oil Pressure (1300), RPM Sense Loss (1501/1505/1511/1515), Underspeed (1600), Undervoltage (1900), Overload (2100), and Low Battery, you can quickly identify the specific problem your generator is facing.

Resolving these fault codes is crucial for maintaining the efficiency of your Generac generator. By following the troubleshooting steps outlined in this guide, you can address issues related to overcranking, overspeed, low oil pressure, RPM sense loss, underspeed, undervoltage, overload, and low battery. Regular monitoring of your generator’s performance and prompt resolution of fault codes will contribute to its longevity.

To clear fault codes, follow these simple steps. First, power off the generator and wait for a few minutes to ensure all residual power is discharged. Then, access the control panel and navigate to the fault code menu. Identify the specific code that needs to be cleared and select the appropriate option to clear the fault codes. This process will reset the generator’s system and allow you to start afresh.

Having a clear understanding of Generac generator fault codes is essential for any generator owner. It enables you to troubleshoot and resolve issues in a timely manner, avoiding potential damage and disruption. By taking a proactive approach to monitoring and addressing fault codes, you can ensure that your Generac generator operates efficiently and reliably for years to come.

FAQ

Q: What are some common Generac generator fault codes?

A: Some common fault codes include Overcrank (1100), Overspeed (1200/1205), Low Oil Pressure (1300), RPM Sense Loss (1501/1505/1511/1515), Underspeed (1600), Undervoltage (1900), Overload (2100), and Low Battery.

Q: How do I clear fault codes on a Generac generator?

A: To clear fault codes, identify the specific code, resolve the underlying issue, power off the generator, wait for a few minutes, access the control panel, navigate to the fault code menu, and clear the fault codes.

Q: What is the Overcrank (1100) fault code?

A: The Overcrank fault code (1100) indicates an issue with the generator’s attempts to start. Troubleshooting and resolving the underlying issue causing the Overcrank fault is necessary.

Q: What does the Overspeed (1200/1205) fault code mean?

A: The Overspeed fault code (1200/1205) signals that the generator’s engine speed is exceeding safe limits. Understanding and addressing the underlying cause of this fault code is essential.

Q: What does the Low Oil Pressure (1300) fault code indicate?

A: The Low Oil Pressure fault code (1300) suggests that the generator may be experiencing a drop in oil pressure. Troubleshooting and resolving the issue causing this fault code is necessary for proper generator operation.

Q: What do the RPM Sense Loss (1501/1505/1511/1515) fault codes mean?

A: The RPM Sense Loss fault codes (1501/1505/1511/1515) indicate a loss of RPM sensing in the generator. Troubleshooting and resolving the RPM sensing issue is crucial for proper generator function.

Q: What does the Underspeed (1600) fault code signify?

A: The Underspeed fault code (1600) suggests that the generator is running at a lower speed than it should be. Troubleshooting and resolving the issue causing the underspeed fault is necessary.

Q: What is the Undervoltage (1900) fault code?

A: The Undervoltage fault code (1900) indicates a drop in voltage supply to the generator. Troubleshooting and rectifying the undervoltage issue is crucial for proper generator operation.

Q: What does the Overload (2100) fault code mean?

A: The Overload fault code (2100) suggests that the generator is experiencing excessive load, potentially exceeding its capacity. Addressing the overload issue is necessary for safe and efficient generator operation.

Q: What does the Low Battery fault code indicate?

A: The Low Battery fault code signals that the generator’s battery is running low on power. Troubleshooting and addressing the low battery issue is necessary to ensure proper generator function.

Q: How can I ensure the longevity and efficiency of my Generac generator?

A: Regularly monitoring and promptly resolving fault codes contribute to the longevity and efficiency of Generac generators. Understanding and troubleshooting these fault codes is essential for maintaining optimal generator performance.

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