Replacing DC string fuses (-SX / -SY versions)
The string protection fuses in the inverter -SX / -SY versions 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 box which allows them to be
removed easily and correctly positioned when being inserted.
Procedure for replacing string fuses:
1. Disconnect the strings by disconnecting the DC and AC disconnect
switches tted on the inverter followed by the quick t input connectors.
By only disconnecting the AC disconnect switch and the DC disconnect switch, the DC input
voltage is still present on the fuse board
2. Remove the fuse to be replaced acting on the fuse box grip
3. Lift the fuse retaining clip and remove the fuse from the fuse box
4. Introduce the new fuse into the fuse box
5. Fit the fuse box into the wiring box
Once the fuse box has been tted, check that it is in contact with the fuse board.
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