Read the manual thoroughly and understand all of the instructions, cautions, and warnings before using this equipment. If any section of the manual is not understood, contact your nearest authorized dealer, or contact Generac Customer Service at 1-888-436-3722 (1-888-GENERAC), or www.generac.com with any questions or concerns.
How do I return a generator to automatic mode after service?
Performing generator maintenance requires removing power from the generator and control panel. This article is intended to guide users on how to return a home standby generator to service (or AUTO mode) after performing maintenance.
See here to learn more about regularly scheduled maintenance for home standby generators:
See here to learn more about safely powering your generator down prior to beginning maintenance: What Safety Precautions Should I Take When Performing Maintenance on My Generator?
Environment
This article applies to Generac air-cooled Guardian Series 10-26 kW generators (2017 to present). If the generator has been in continuous use (during an outage), reference this article before powering the generator back on: How Do I Shut Down My Generator When It’s Powering My House (During an Outage)?
Procedure
Any time maintenance is performed on a home standby generator, the unit should be turned OFF and the MLCB (main line circuit breaker) should be turned OFF.
Returning unit to service during normal conditions (utility power present)
1. Perform required maintenance procedures.
2. Install the intake side panel and front panel if removed.
3. Re-install 7.5A fuse in the control panel.
4. Complete Install Wizard information.
5. Press the Auto button on the control panel. The system is now in AUTO.
6. Set generator MLCB (generator disconnect) to ON (CLOSED).
Returning unit to service during a utility outage
1. Perform required maintenance procedures.
2. Install the intake side panel and front panel if removed.
3. Re-install 7.5A fuse in the control panel.
4. Complete Install Wizard information.
5. Press the Auto button on the control panel. Allow the unit to run for one minute with no load (if running during a utility outage).
6. Set generator MLCB (generator disconnect) to ON (CLOSED).
7. Set utility MLCB to ON (CLOSED). The system is now in AUTO.
Note: If utility power is present at this time, generator will perform its usual shutdown process.
Clearing maintenance alarms
If returning the unit to service after performing maintenance, you may need to clear one or more maintenance alarms. Follow these steps:
1. Press the red OFF button
2. Press ENTER 2 times for each maintenance alarm present. There may be more than one maintenance alarm; press ENTER to acknowledge and clear each alarm for which maintenance has been completed.
3. Press the green AUTO button. This will return the unit to automatic standby mode.
For more detailed instructions see How Do I Clear an Error or Alarm Code On My Home Standby Generator?
Next steps
Some owners may experience an error 2800 if the auxiliary shutoff switches were touched during maintenance. See the What Does It Mean When My Generator Displays an Error Code: Auxiliary Shutdown, Code 2800? for steps to resolve this error.
If the generator battery is disconnected, this will cause the generator to run through the install wizard when power is resupplied. If the generator was connected to Mobile Link via Wi-Fi, this will require reconnecting to the home Wi-Fi network. See the How Do I Reconnect My Generator to a Wi-Fi Network if It Has Become Disconnected? article for more information.
See also
