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000852BG
8 - Maintenance
Replacing DC string fuses
Some inverter parts may be subject to voltages that could be hazardous for the operator.
Before performing any work on the inverter, refer to “Inverter switch-off” chapter on this manual
to know all the necessary step to safely operate on the inverter.
The string protection fuses (where present) in the inverter may need to
be replaced in the following circumstances:
1. Adjustment of the fuse value on the basis of the type of PV panels used
2. Damaged fuse
Fuses are replaced using the specic fuse holder which allows them to
be removed easily and correctly positioned when being inserted.
Procedure for replacing string fuses from positive
19
or negative
20
(only
on -SX2, -SY2 model) string fuses plates:
1. Open any AC disconnect switch downstream of the inverter.
2. Open the DC disconnect switches
15
and the AC disconnect switch
09
(only on -SX2, -SY2 model).
By only disconnecting the AC disconnect switch and the
DC disconnect switch, the DC input voltage is still present
on the fuse board.
3. Disconnect the strings by disconnectiong the quick t input connectors
16
.
4. Wait enough time for the stored energy to be discharged (min time 6
minutes).
5. Open the wiring box cover
07
6. Remove the fuse to be replaced acting on the fuse holder grip
7. Lift the fuse retaining clip and remove the fuse from the fuse holder
8. Introduce the new fuse into the fuse holder
9. Fit the fuse holder into the positive
19
or negative
20
(only on -SX2,
-SY2 model) string fuses plates.
Once the fuse box has been tted, check that it is in contact with the fuse board.
2
3
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