SMA STP3.0-3AV-40, Руководство по эксплуатации

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11 Troubleshooting SMA Solar Technology AG
Operating manual STP3-6-3AV-40-BE-en-13 93
6. Set the test voltage. The test voltage should be as close as possible to the maximum system
voltage of the PV modules but must not exceed it (see datasheet of the PV modules).
7. Measure the insulation resistance.
8. Eliminate the short circuit.
9. Measure the remaining strings in the same manner.
☑ If the insulation resistance of a string deviates considerably from the theoretically
calculated value, there is a ground fault present in that string.
10. Reconnect to the inverter only those strings from which the ground fault has been eliminated.
11. Reconnect all other strings to the inverter.
12. Recommission the inverter.
13. If the inverter still displays an insulation error, contact the Service (see Section 14, page 103).
The PV modules might not be suitable for the inverter in the present quantity.
11.4 Problems with streaming services
If you use the streaming service in your local network (in which the inverter is also included), there
may be interference to the transfer of data. In this case, the IGMP settings of the inverter can be
changed via operating parameters.
• Contact the Service and change IGMP settings in consultation with the Service department.