68
Short interruption of power
supply feeding into mains
network caused by overload
current
FRONIUS IG resumes star-
ting up phase
301 overload current (AC)
Service class 3 comprises service codes which may appear during opera-
tion of feeding power supply, which however basically do not cause a
permanent interruption of the operation of feeding power into the mains.
After automatic disconnection from the mains and monitoring of the mains
as stipulated, your FRONIUS IG unit will try to resume the feeding operati-
on.
Code Designation Description
Class 3
automatically by itself
Should the service load
appear permanently you
should contact your in-
stallation specialist
Repair
Short interruption of power
supply feeding into mains
network caused by overload
current
FRONIUS IG resumes star-
ting up phase
302 overload current (DC) automatically by itself
Should the service load
appear permanently you
should contact your in-
stallation specialist
Short interruption of power
supply feeding into mains
network caused by tempe-
rature excursion
air vents clogged
303 * temperature excursion
AC side
after a two minutes’ coo-
ling phase your FRONI-
US IG unit begins star-
ting up again
clean air vents.
Should the service load
appear permanently you
should contact your in-
stallation specialist
Short interruption of power
supply feeding into mains
network caused by tempe-
rature excursion
304 * temperature excursion
DC-side
after a two minutes’ coo-
ling phase your FRONI-
US IG unit begins star-
ting up again
clean air vents.
Should the service load
appear permanently you
should contact your in-
stallation specialist
air vents clogged
* Service code 303 and 304 are shown briefly under certain circumstances. A brief
display of the service codes 303 and 304 does not mean there is a fault.
ENS recognises a faulty
mains relay
208 Problems with the
mains relay
If Service-Code is dis-
played permanently, you
should contact a Fronius
trained service technici-
an
Code Designation Description Repair
Class 2
(continued)
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