How to Turn Off a Generac Generator?

Turning off a Generac generator involves a series of carefully sequenced steps to safely disconnect the generator from the electrical system. This process is essential during utility outages, routine maintenance, or when conserving fuel.

How to Turn Off a Generac Generator? To turn off a Generac generator, press and hold the manual/auto/off button until the LED indicator turns off. Alternatively, use the generator’s control panel to switch the unit to the “Off” position.

A Comprehensive Guide – How to Turn Off a Generac Generator?

In this comprehensive guide, we will walk you through the step-by-step process of turning off a Generac generator, covering shutdown during utility outages and for maintenance purposes.

Shutting Down During Utility Outages

1. Set the Main Utility Disconnect to OFF

The first step in shutting down your Generac generator during utility outages is to locate and set the main utility disconnect to OFF. This ensures a safe disconnection from the utility power supply.

2. Set the Generator MLCB to OFF

Next, locate the generator’s Main Line Circuit Breaker (MLCB) or generator disconnect and set it to OFF. This isolates the generator from the home’s electrical system.

3. Allow the Generator to Cool Down

After setting the MLCB to OFF, it’s crucial to allow the generator to run for approximately one minute. This cooldown period helps prevent equipment overheating and ensures a safe shutdown.

4. Set the Generator at the Controller to OFF

Navigate to the generator’s controller and set it to OFF. This step initiates the shutdown sequence and prepares the generator for the next cycle.

5. Remove the 7.5A Fuse from the Controller

To complete the shutdown process, locate the 7.5A fuse in the controller and remove it. This step ensures that the generator is completely disconnected and ready for maintenance or fuel conservation.

Turning the Generator Back On

1. Install the 7.5A Fuse in the Controller

When it’s time to restart the generator, insert the 7.5A fuse back into the controller. This step is essential for restoring power to the generator’s control system.

2. Confirm the Generator MLCB is OFF

Before proceeding, double-check that the generator’s Main Line Circuit Breaker (MLCB) or generator disconnect is still set to OFF. This ensures a safe startup sequence.

3. Set the Generator at the Controller to AUTO Mode

Navigate to the generator’s controller and set it to AUTO mode. This mode allows the generator to start automatically when needed, providing a seamless transition to backup power.

4. Allow the Generator to Start and Run

After setting the controller to AUTO, the generator will start automatically. Allow it to run for a few minutes, giving the system time to warm up and stabilize.

5. Set the MLCB to ON

Once the generator has warmed up, set the Main Line Circuit Breaker (MLCB) or generator disconnect to ON. This step integrates the generator back into the home’s electrical system.

6. Set the Main Utility Disconnect to ON

Finally, set the main utility disconnect to ON. This restores the connection to the utility power supply, and your Generac generator is now operating in automatic mode.

Additional Considerations

Programming and Settings

After completing the startup sequence, the control panel may go through programming. All settings should be retained, requiring only a simple confirmation by pressing enter. Feel free to make any adjustments as needed.

Reconnecting Wi-Fi

If your router is not backed up by the generator, you may need to reconnect your Wi-Fi after the startup process to ensure communication with the generator’s control system.

Shutting Down for Maintenance

Generac recommends shutting down units every 24 hours of operation for maintenance checks, including oil level and air filter inspection.

1. Turn Off the Home’s Main Utility Disconnect

Begin the maintenance shutdown by turning off the main utility disconnect in either the transfer switch or the home’s breaker box.

2. Turn Off the Generator’s Main Line Circuit Breaker

Locate the generator’s Main Line Circuit Breaker (MLCB) and turn it off. Allow the generator to run for 3-5 minutes for cooling.

3. Turn the Generator Off

After the cooling period, set the generator at the controller to OFF. If maintenance is planned, remove the 7.5A fuse on the control panel.

4. Prevent Accidental Start-Up for Maintenance

If maintenance involves checking the oil level and air filter, take extra precautions. Remove the T1 battery-charging fuse in the transfer switch and disconnect the positive and negative battery cables to prevent accidental start-up.

5. Check Oil Level and Air Filter

After the generator has cooled down for 10-15 minutes, check the oil level and inspect the air filter. Regular maintenance ensures optimal performance.

6. Restart the Generator

Once maintenance is complete, restart the generator. Switch the control panel from OFF to AUTO and allow the generator to start and warm up for 3-5 minutes. Set the generator’s Main Line Circuit Breaker (MLCB) to ON, and the system will be operating in Automatic Mode.

7. Turn On the Main Utility Disconnect

Finally, turn on the main utility disconnect in the transfer switch or the home’s breaker box.

Conclusion

Understanding the proper procedures for shutting down and restarting a Generac generator is essential for homeowners. By following these step-by-step instructions, you can ensure a safe and efficient process, whether during utility outages or routine maintenance, maintaining the reliability of your backup power source.