Fronius IG 15 - Manual (Page 20)

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Product description
The FRONIUS IG Unit
The FRONIUS IG unit is designed for fully automatic operation. Basically
no personal control is necessary for feeding the power it generates into
the mains network.
The FRONIUS IG unit starts operating automatically as soon as the solar
modules produce sufficient power output after sunrise. From this point
onwards, you will also receive system information from the FRONIUS AG
graphic display.
During its operation the FRONIUS IG unit maintains the voltage of the
solar modules at any time within the range of optimal power withdrawal.
- the optimal voltage for any particular status of operation of the solar
modules is called MPP voltage (MPP = maximum power point)
- exactly maintaining the MPP voltage guarantees an optimal level of the
efficiency factor of your solar modules at any time (MPP-tracking).
As soon as dusk begins there is no more sufficient energy available to
feed into the mains network, the FRONIUS IG unit fully shuts off the
mains connection.
- during the night the FRONIUS IG unit does not draw any energy from
the public mains
- the data and parameters set remain available
- it is also possible to shut the unit off manually
How it func-
tions
After having switched on automatically, the FRONIUS IG unit goes throu-
gh a self-test, and after that through a test of the public mains network.
This test takes between only few seconds up to several minutes, depen-
ding on the regulations in your country. During startup the LED illuminati-
on is yellow.
(1) Segment test
- all display elements light up for about one second
(2) TEST
- self test of important components of the FRONIUS IG unit
- The FRONIUS IG unit goes through a master check list for a period
of only a few seconds
- the display says „TEST“ and indicates the respective component
which is being tested (for example „LED“)
Startup phase