Fronius Primo GEN24 4.0 Operating Instructions Manual page 158

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Use a slotted screwdriver to push in
the lock on the terminal. Insert the
stripped single conductor into the slot
provided, in each case as far as it will
go. Then withdraw the slotted screw-
driver from the lock.
Connect the solar module strings (+/-).
Use a suitable measuring instrument
to check the voltage and polarity of
the DC cabling.
CAUTION!
Danger due to polarity reversal at the
terminals.
This may result in severe damage to
the inverter.
▶
Check the voltage (max. 600 V
and polarity of the DC cabling with
a suitable measuring instrument.
)
DC