Customer Support Resource Guides:
Fronius Inverters
Fronius Inverters
SunCommon has installed three kinds of Fronius inverters. The type of inverter installed at your home may determine the way you troubleshoot issues your inverter is experiencing.
From left to right below, they are Fronius Primo, Fronius IG Plus, and Fronius Galvo.
How to read your Fronius Primo or Galvo screen
Illuminate the screen by pressing the fourth button below the screen (see image). The AC Output Power shows how much power in watts your system is currently producing. If that number is greater than zero during the daytime and the green light to the left is illuminated, your system is producing.
You can also watch the video below for a more in-depth explanation of how to navigate through your screen.
How to power cycle (reset) your Fronius inverter
If you have a Fronius inverter displaying error codes, power cycling is a good next step. If you have Ground Faults or Isolation Errors, do not attempt to power cycle your device because of electrical hazards and instead contact SunCommon Customer Support.
Turn off the DC disconnect. This is the black dial on the underside of your inverter. Simply turn it to the “off” position.
Turn off your system’s AC disconnect. This is located outside next to your utility meter and is a lever that you’ll pull down into the “off” position. (See reference photos below)
Wait 5 minutes and then turn them back on in reverse order. Throw the AC lever back up into the “on” position, and turn the dial on the inverter back to the “on” position.
If you’re resetting an “Arc Detected” code, watch the inverter screen after reenergizing it. You should see a prompt to knock on the inverter to clear the code officially.
After these steps, the inverter will start to turn back on and may take a minute or two to reboot. You should see the main screen as normal once the reboot is complete with no error message. If the issue persists, please contact SunCommon Customer Support.
Reconfiguring Fronius to new networks
If you’ve changed your network settings, you may have to go into your Fronius settings to reconnect your inverter to the internet. Read this guide to reconnecting your Fronius inverter to your monitoring, or watch the video below.
Common error messages
Causes: large electrical surges (e.g. lighting), construction, cell tower, electrical fencing, electric water heater
Fix (for Primos and Galvos): Press fourth button until “wait master ready” appears and the light turns green. A progress bar will appear as the system resets.
The code goes up incrementally after each fault (240, 241, 242). After the third code, contact SunCommon customer support for next steps.
For Arc Faults on tower Fronius (IG plus) inverters, you’ll need to reset AFD to clear the fault. This document shows you how.
No feed-in within the last 24 hours, usually due to snow cover on panels or night time.
No connection to the internet.
The function to detect arcs has failed. This self corrects.
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View our Customer Care and Maintenance Guide here for more information on services and rates.