123
EN-US
Class 4 status
codes
Class 4 status codes may require the inter-
vention of a trained Fronius service techni-
cian.
401
No internal communication with power stage set
Description The inverter will automatically attempt to connect again and, if
possible, resume feeding power into the grid
Remedy Check grid connections and fuses
If status code persists: Contact a Fronius-trained service tech-
nician
402
Communication with EEPROM not possible
Description The inverter will automatically attempt to connect again and, if
possible, resume feeding power into the grid.
Remedy If status code persists: Contact a Fronius-trained service tech-
nician
403
EEPROM faulty
Description The inverter will automatically attempt to connect again and, if
possible, resume feeding power into the grid.
Remedy If status code persists: Contact a Fronius-trained service tech-
nician
406
One or both temperature sensors are defective
Description The inverter disconnects from the grid for safety reasons.
Remedy If status code persists: Contact a Fronius-trained service tech-
nician
407
Temperature sensor at cooling element defective
Description The inverter disconnects from the grid for safety reasons.
Remedy If status code persists: Contact a Fronius-trained service tech-
nician
408
Direct current feed in
Description The inverter disconnects from the grid for safety reasons.