69
ENEN
If it is possible, your FRONI-
US IG unit will resume the
power feeding operation af-
ter successfully completing
another attempt to connect
401 no internal communica-
tion with power stage
Class 4 service codes require in some cases the intervention of a trained
Fronius service technician.
Code Designation Description
Class 4
If an error code is dis-
played permanently, you
should contact a Fronius
trained service technici-
an
Repair
If it is possible, your FRONI-
US IG unit will resume the
power feeding operation af-
ter successfully completing
another attempt to connect
402 no internal communica-
tion with ENS
If Service-Code is dis-
played permanently, you
should contact a Fronius
trained service technici-
an
If it is possible, your FRONI-
US IG unit will resume the
power feeding operation af-
ter successfully completing
another attempt to connect
403 EEPROM faulty If Service-Code is dis-
played permanently, you
should contact a Fronius
trained service technici-
an
If it is possible, your FRONI-
US IG unit will resume the
power feeding operation af-
ter successfully completing
another attempt to connect
404 No communication
possible between the
control unit and ENS
FRONIUS IG has no net-
work connection. Check
if the mains supply isola-
tor is switched on
If Service-Code is dis-
played permanently, you
should contact a Fronius
trained service technici-
an
If it is possible, your FRONI-
US IG unit will resume the
power feeding operation af-
ter successfully completing
another attempt to connect
405 Incorrect or faulty ENS-
card
If Service-Code is dis-
played permanently, you
should contact a Fronius
trained service technici-
an
FRONIUS IG disconnects
from the mains supply for
safety reasons
406 AC temperature sensor
faulty
If Service-Code is dis-
played permanently, you
should contact a Fronius
trained service technici-
an
FRONIUS IG disconnects
from the mains supply for
safety reasons
407 DC temperature sensor
faulty
If Service-Code is dis-
played permanently, you
should contact a Fronius
trained service technici-
an
FRONIUS IG disconnects
from the mains supply for
safety reasons
408 Direct current input If Service-Code is dis-
played permanently, you
should contact a Fronius
trained service technici-
an
FRONIUS IG does not
switch itself onto the mains
supply.
409 No +15V supply avai-
lable for the control
electronics
If Service-Code is dis-
played permanently, you
should contact a Fronius
trained service technici-
an
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