Checking The Function Of The String Fuses - SMA 9000TL Installation Manual

SMA Solar Technology AG

10.10 Checking the Function of the String Fuses

If the red LED is flashing and the inverter displays the message DC fuse, at least one of the string fuses
may have tripped or be defective. Each string fuse is assigned to one string.
Figure 16: Assignment of the string fuses to the strings
Check the function of each string fuse as described below.
1. Disconnect the inverter from all voltage sources (see section 9).
2. Remove the string fuse with the fuse extractor
from the fuse holder.
3. Remove the string fuse from the fuse extractor.
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