Info What does this mean?

A status message, not a fault. It usually clears on its own and needs no action from you.

Fronius Inverter STATE 106 Error: Meaning, Causes & Safe Fix

STATE 106 means the grid frequency dropped too low, so your inverter briefly disconnected for safety. It reconnects automatically once the grid stabilizes — there is no fault in your equipment.

What should I do first?

Two quick questions — we'll point you to the right starting point.

Is this code still showing on your inverter's display?

What this code means

The inverter detected that the AC grid frequency fell below the permitted range and disconnected from the grid, as required by grid standards. This is a Class 1 status: typically temporary, caused by the grid rather than your inverter, and the manual states explicitly that no device fault has occurred. The inverter monitors the grid for the stipulated observation period and resumes feeding power automatically once the frequency is back within range.

Common causes

A grid frequency dip — a utility-side event (most common)
Local grid instability, e.g. a large load switching nearby
Incorrect country/grid setup on the inverter (rare — an installer setting)

Safe steps to try

Work top to bottom, ticking off each step as you complete it. 0 of 4 done.

Wait — the inverter checks the grid and reconnects by itself; most STATE 106 events clear without any action.
Check whether your home still has grid power (lights, appliances) to confirm it is a grid event.
Note the time and how long the status lasted, in case it recurs.
If STATE 106 keeps recurring, contact your system installer — that is the manual's stated remedy.

Is your inverter still under warranty?

Before paying for a repair, check — your installer may fix this free.

Brand Year installed

Based on typical standard warranty terms — always confirm with your warranty card or installer paperwork, as terms vary by model, region, and purchase date.

When to call an electrician

If the status code keeps recurring, contact your system installer (per the manual). A one-off event that clears by itself needs no action.

Frequently asked questions

Is STATE 106 a fault with my inverter?

No. The manual states explicitly that no device fault has occurred — the cause lies in the grid. Your inverter is protecting itself and will resume automatically.

How long before it reconnects?

The inverter waits out the observation period required by your country's grid standard, then resumes feeding power once the grid is stable — usually a matter of minutes.

Should I reset the inverter?

No need — it reconnects by itself. Only contact your installer if the code keeps coming back.

Sources: meaning and troubleshooting verified against the manufacturer's documentation — Fronius Primo 208-240 Operating Instructions, 42,0410,2116 (EN-US) — Status Codes, Class 1