105
Remedy If status code persists: Contact a Fronius-trained service tech-
nician.
456
Error in islanding check of Guard Control
Description The inverter stops feeding power into the grid, the display
shows a critical error via a red Operating Status LED.
Remedy If status code persists: Contact a Fronius-trained service tech-
nician.
457
Grid relay defective
Description Inverter does not feed energy into the grid.
Remedy If status code persists: Contact a Fronius-trained service tech-
nician.
458
DSP and Guard Control measure different RCMU values
Description Inverter does not feed energy into the grid.
Remedy Check to ensure that phase and neutral conductors are con-
nected properly.
If the status code persists: Contact a Fronius-trained service
technician.
459
Measurement signal recording not possible for the insulation test
Description Inverter does not feed energy into the grid.
Remedy If status code persists: Contact a Fronius-trained service tech-
nician.
460
Reference power source for the digital signal processor (DSP) is operating outside of tol-
erances
Description Inverter does not feed energy into the grid.
Remedy If status code persists: Contact a Fronius-trained service tech-
nician.
461
Error in DSP data memory
Description Inverter does not feed energy into the grid.
Remedy If status code persists: Contact a Fronius-trained service tech-
nician.
462
Error in DC feed-in monitoring routine
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