416 on a Fronius International GmbH Fronius SnapINverter: No communication possible between power stage set and control system
Short answer
On a Fronius International GmbH inverter, 416 means: No communication possible between power stage set and control system. The inverter stops until the fault clears or is reset. An engineer is needed to fix the cause.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: No communication possible between power stage set and control system.
Part involved: inverter electronics.
When it shows: Class 4 status code.
Likely causes:
- The inverter will automatically attempt to connect again and, if possible, resume feeding in; if displayed all the time notify a Fronius-trained service engineer.
Is it safe?
| Does the inverter stop? | Yes |
|---|---|
| Severity | Fault — clears by itself when the condition goes |
| Engineer needed? | Yes |
The inverter stops until the fault clears or is reset.
Resetting itself: yes.
Manual reset: Automatic when condition clears.
What you can check
- Read the state code on the inverter display or in Fronius Solar.web and note date/time for your installer.
- If the code shows all the time, contact your installer.
What the engineer will check
- Fronius Service diagnosis (power stage, sensors, control boards); check grid for 453/454.
Who to ask for: Fronius-trained PV installer / Fronius Service Partner.
Certification: Qualified electrician (BS 7671; MCS-certified PV installer for work on the PV array/DC side).
What you might notice
Sources
- Fronius Primo 3.0-1 - 8.2-1 Operating Instructions (HTML) ↗ · 42,0410,2165 online edition · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026