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000880BG
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
Procedure for replacing string fuses from positive
35
or negative
34
(only
on -SX, -SX2 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 disconnectiong the quick t 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
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