78 SMC9-11TLRP-IA-en-51 Installation Manual
10 Troubleshooting SMA Solar Technology AG
If the string fuse is not conductive, the string fuse is defective. Replace all string fuses
immediately.
• Order a new string fuse (see section 13 "Accessories", page 91).
• Have all strings with defective string fuses checked by the installer of the PV array.
Commission the inverter after the strings have been checked (see section 8 "Commissioning",
page 51).
• If new string fuses are available, replace all string fuses (see section 10.11).
4. Use a continuity tester to measure whether the
string fuse is conductive.
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