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.
Performing a hard reset on a home standby generator system
The process of performing a hard reset on a Generac home standby generator removes all power from the generator's control panel. Performing a hard reset may help resolve temporary control panel errors and issues.
GeneracNext Generation Series 10-28 kW air-cooled standby generators
GeneracGuardian Series10-26 kW air-cooled standby generators (2017 to present)
Note: The hard reset process is the same for Guardian series and Next Generation series generators. The only difference is the style and appearance of the control panel.
A hard reset may resolve these symptoms:
A controller with a blank display
An unresponsive controller
A Controller Displaying A “Not Activated” message
An alarm that does not clear
A controller displaying unintelligible characters or symbols
“Model Ident Problem – Fix Harness Resistor” messages
Other error codes indicate that an issue is present with the generator that must be resolved before the error code will clear. For a full list of error codes and troubleshooting, see the Where can I find a list of error codes for my generator? article.
Hard reset procedure
This process may power off all devices in your home when flipping the main disconnect switch. If you are not comfortable following this procedure, reach out to a local Generac certified technician. See the How Can I Find a Generac Service Dealer in My Area? article for more information.
Video Instructions (Guardian series)
Hard reset written instructions
1. Turn the generator control panel to the OFF position.
Guardian Series
Next Generation Series
2. Lift the rubber flap and remove the 7.5 amp fuse from the controller.
4. Disconnect the battery starting with the black negative (-) cable first, then the red positive (+) cable. See below for a typical battery installation for each generator series.
Guardian Series
Next Generation Series
5. Locate the service disconnect and turn it to the OFF position.
Note:the location and appearance of the utility service disconnect will depend on the home's electrical system:
1. If the home has a service entrance rated automatic transfer switch, the utility service disconnect will be found there. (see fig. 1 below)
2. If the home has a non-service entrance rated automatic transfer switch, the utility service disconnect will be found on the home's electrical panel (fig. 2) or a stand-alone box (see fig. 3 below- image may not be an exact representation of your home's standalone box).
fig.1
fig. 2
fig. 3
6. Then, in this order: connect the battery starting with the red positive (+) cable first, then the black negative (-) cable last. Replace the controller 7.5A fuse, and the Install Wizard should appear. Lastly, turn the service disconnect breaker back to the ON position. The hard reset is now complete.
Note: Next generation generators will not go through the install wizard.
If issues persist, contact a local Generac certified technician to further troubleshoot the error message or controller issue. See the How Can I Find a Generac Service Dealer in My Area? article for more information.
