121
Status
421
PCB number has been set incorrectly
Behavior The Fronius IG Plus stops feeding power into the
gird, the display shows a critical error via a red Ope-
rating Status LED
Remedy If the status message remains on the display: notify a
Fronius-trained service technician
425
Communication with the power module is not possible
Behavior The Operating Status LED lights up orange, then the
Fronius IG Plus attempts a restart
Remedy If the status message remains on the display: notify a
Fronius-trained service technician
431
All power modules are in boot mode
Behavior The Fronius IG Plus stops feeding power into the
gird, the display shows a critical error via a red Ope-
rating Status LED
Remedy Update firmware using Bootloader or IG.Update
439
MPP Master power module shut down due to an error in a slave power
nmodule (in balance mode)
Behavior The Fronius IG Plus stops feeding power into the
gird, the display shows a critical error via a red Ope-
rating Status LED
Remedy If the status message remains on the display: notify a
Fronius-trained service technician
442
No phase master for a phase
Behavior The Fronius IG Plus stops feeding power into the
gird, the display shows a critical error via a red Ope-
rating Status LED
Remedy If the status message remains on the display: notify a
Fronius-trained service technician
443
Energy transfer not possible
Behavior The Fronius IG Plus stops feeding power into the
gird, the display shows a critical error via a red Ope-
rating Status LED
Remedy If the status message remains on the display: notify a
Fronius-trained service technician
Messages -
Class 4
(continued)
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