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001059AG
8 - Maintenance
R
eplacing 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 total de-energization and safe
access” 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
•
Procedure for replacing string fuses from positive
35
or
negative
34
(only -SC model) string fuses board:
PVS-50-TL-SX
PVS-60-TL-SX
PVS-60-TL-SX-CN
PVS-50-TL-SX2
PVS-60-TL-SX2
35
35
34
1.
Open any AC disconnect switch downstream of the inverter.
2.
Open the DC disconnect switches
15
By only disconnecting the AC disconnect switch and the DC disconnect switch, the DC input
voltage is still present on the fuse board. Use adequate PPE (personal protective equipment).
3.
Disconnect the strings by disconnecting the quick fit input
connectors
19
20
21
.
4.
Wait enough time for the stored energy to be discharged (min time 30
minutes).
5.
Open the wiring box front cover
04
6.
Remove the fuse to be replaced
7.
Introduce the new fuse into the fuse holder on the string fuse boards