Operation and installation manual
Page 61 of 96
(PVI-STRINGCOMB (-S, -MC, -S-MC) - Rev:1.0)
10.2 Maintenance (replacement of fuses / dischargers)
Maintenance inside the PVI-STRINGCOMB(-S) must be carried out following the
procedures described below.
10.2.1 Replacing the dischargers
In this case, it is not necessary to disconnect the inverter since the
overvoltage protection devices have cartridges which can be extracted
without risk.
1) Open the cover.
2) Find the faulty cartridges, i.e. those with a red window.
3) Pull out the damaged cartridge and replace it with a new one, pushing it
firmly home.
4) Repeat the operation for any other damaged cartridges.
5) Check if present the fuses on the sides of the discharger. These should
be replaced if they are opened.
6) Check, by means of the monitoring software and according to the
procedure described in Paragraphs § 12.6 and §12.7, that the new
cartridges work correctly.
7) Refit the cover.
10.2.2 Replacing the fuses
Before proceeding, comply with the instructions given in points 1, 2, 3 of
Paragraph §10.1.1.
1) Remove the faulty fuse, indicated by the monitoring software (Paragraphs
§12.6 and §12.7) and replace it with a new fuse of the same type and part
number.
2) Repeat the operation for any other faulty fuses.
3) Check that the monitoring software (Paragraphs §12.6 and §12.7) signals
no other blown fuse.
4) Close the DC switch, if present (model PVI-STRINGCOMB-S).
5) Refit cover and close it.
