
STATE 456
Anti-islanding function has stopped running properly
Behaviors
The inverter will automatically attempt to connect again and, if possible, resume grid power feed operation
Status Code Class 4
Class 4 status codes (state codes that start with a four, i.e., 4xx), typically necessitate intervention by a Fronius-trained service technician.
STATE 456 applies to:

Primo

Symo

IG Plus

CL
Solutions for this Error
Remedies
- Power Cycle the Inverter. To do so, both the DC and AC power sources must be disconnected to allow the device to discharge. Once the device has had time to discharge, turn on both the AC and DC power sources to the inverter.
- If this issue persists, the next steps include inspecting internal inverter components and their cabling by a trained Fronius Service Provider to further diagnose this specific issue. Defective components or the device itself may need to be replaced.
- Inverter Power Stage may need to be replaced
Get Help with this Error:
The best point of contact is your original installer
If the orginal installer is no longer available, contact a local Fronius Service Provider
DENVER RESIDENTS: Is your system located in the Denver, CO metro area? CONTACT US