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. 

Issue

The controller displays Wiring Error Code 2099 or Transfer Wire Warn.

Overview

• Error codes: 2099
• LED Indicator: Red
• Message: Wiring Error or Transfer Wire Warn
• Issue: This error code indicates miswiring. It indicates wires are crossed, for example, the N1 to 194, or 23 to T1, or if one of the AC (N1, N2, T1) wires is crossed with the DC wires (194, 23, 0). The error may indicate AC voltage detected on a DC input, but will not indicate exactly which wires are crossed.
   

Environment

This article applies to Generac air and liquid-cooled home standby generators and automatic transfer switches. For Next Generation models with a Power Zone 200 controller, this error will appear in Mobile Link.

Troubleshooting

A certified installer should inspect the customer connections panel to ensure wires are not crossed. Generac support does NOT recommend end users attempt to modify or service internal generator or transfer switch wiring. Generac-certified dealers are trained to service Generac generators and can be contacted using the dealer lookup tool on Generac's site. See How Can I Find a Generac Service Dealer in My Area? for more information. 

Controller Wiring

See: What is the layout of the control wires and what do they do?

Integrated Smart A/C Module (SACM) wiring

Note: Certain transfer switches do not feature a SACM module. See What is the Next Generation Automatic Transfer Switch? for more information.

See also

For a complete list of home standby generator error codes, see the Where can I find a list of error codes for my generator? article.