"Undervoltage" Nope, fried ants and controller

Generac, Guardian, Honeywell, Siemens, Centurion, Watchdog, Bryant, & Carrier Air Cooled Home Standby generator troubleshooting and repair questions
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Posts: 1
Joined: Thu May 02, 2019 8:26 pm

Thu May 02, 2019 9:29 pm

Generac Guardian series 10kw
Model: 0058711
Serial Number 7093685
Controller: 0H6680D

I have been getting a "under-voltage" message on my generator. Then I noticed a couple ants under my screen the other day while installing a new battery. It was old and giving me a battery message this winter. I thought maybe that might have something to do with the "under-voltage", I was wrong. The next day when i tried to dig into this under-voltage problem the whole screen was filled with ants. Wondering how they got in there, and how to get them out i tore into the controller. I found fried ants and my controller burnt.

I guess it is time for a new controller. it sounds like there is a upgraded controller. I do not know anything about it. Is it worth upgrading or should i just replace my current controller($400).
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Site Admin
Site Admin
Posts: 340
Joined: Sat Aug 04, 2018 8:46 pm
Location: Clawson, MI

Thu May 02, 2019 9:36 pm

Ouch! This is not an uncommon issue unfortunately. They like the warmth and I've also heard that they're attracted a high pitched sound the controller makes.

I tell my customers to spray Ortho Home Defense Max around the outside of the unit every month or so as soon as it's bug season.

As far as an upgrade, the 0H6680D controller is the newest version available for this unit. The older 0H6680B and A were replaced by the D version with the use of an adapter harness.

I have a 0H6690D in stock here if you need one. Here's a link to my store if you want to check it out.
https://shop.gentekpower.com/products/g ... trol-panel
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