5 Removing the BFS Assembly
SMA Solar Technology AG
Replacement Manual
STP50-4x-BFS-RM-xx-11
13
12. Ensure that no voltage is present at the DC inputs on
the inverter using a suitable measuring device.
A
B
C
<30V
13. Unscrew (TX25) all 10 screws of the enclosure lid of
the AC-Connection Unit and remove the enclosure
lid carefully towards the front.
10x
14. Set the screws and the enclosure lid aside and store safely.
15. Ensure there is no voltage on the AC terminal block between L1 and N, L2 and N, and L3 and
N using a suitable measuring device. To do so, insert the test probe (maximum diameter:
2.5 mm (0.078 in)) into the measuring points of the respective terminal blocks.
16. Ensure that there is no voltage on the AC terminal block between L1 and grounding
conductor, L2 and grounding conductor, and L3 and grounding conductor using a suitable
measuring device. To do so, insert the test probe (maximum diameter: 2.5 mm (0.078 in)) into
the measuring points of the respective terminal blocks.
5
Removing the BFS Assembly
The communication assembly and the BFS assembly must not be replaced in
one step.
• If both assemblies have to be replaced, recommission the inverter after replacing the first
assembly. Only then may the second assembly be replaced.
DC-
Connection Unit
COM
LED
A
BFS
Figure 1 : Position of the communication assembly
ENGLISH
Summary of Contents for STP 33-US-41
Page 57: ...1 SMA Solar Technology AG STP50 4x BFS RM xx 11 57 1 5 1 6 X703 1 X703 6 10...
Page 60: ...2 SMA Solar Technology AG STP50 4x BFS RM xx 11 60 DC DC DC DC 5...
Page 61: ...2 SMA Solar Technology AG STP50 4x BFS RM xx 11 61 AC DC DC AC DC 1000 V...
Page 62: ...2 SMA Solar Technology AG STP50 4x BFS RM xx 11 62 DC 5 C v v...
Page 67: ...5 BFS SMA Solar Technology AG STP50 4x BFS RM xx 11 67 5 DC DC DC 1 1 6 DC DC DC 7 8 X1...
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Page 205: ...5 BFS SMA Solar Technology AG STP50 4x BFS RM xx 11 205 5 DC DC DC 1 1 6 DC DC DC 1 7 8 X1...
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