STATE 479STATE 479
Intermediate circuit voltage relay switched off
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 479 applies to:
Primo
Symo
Solutions for this Error
Remedies
- Ensure inverter is switched on
- Check DC cables at the inverter and ensure DC disconnects are in the ON position. Measure DC voltage, polarity, and isolation at the inverter clamps (Qualified Techs only).
- 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.
- Run latest firmware update
- 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.
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
