SMA SHP 125-US-20, Руководство по эксплуатации

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12 Troubleshooting SMA Solar Technology AG
Operating manual SHP-US-20-BE-en-10 80
Procedure:
1. In the parameter group Device > Operation , select the parameter Ethernet link diagnostic
via LED and set this to On .
☑ Blue LED flashes (2 s on and 250 ms off): one network cable is connected to the inverter.
☑ If the blue LED is not flashing, no network cable is connected.
2. Check whether for the inverters where the blue LED is flashing there really should only be one
network cable connected or whether two network cables should be connected here.
3. Check whether for the inverters where the blue LED is not flashing there really should not be a
network cable connected.
Test Speedwire Communication via SMA Data Manager
If there is a SMA Data Manager in the system, the inverter can indicate signal whether the
Speedwire communication is working properly or if there is a problem by the red LED flashing. The
diagnostic function can only be activated via the user interface of the SMA Data Manager.
Procedure:
1. Select the Communication diagnostic parameter via the SMA Data Manager user interface
and set it to On .
☑ The red LED of the inverter flashes (250 ms on and 250 ms off): The communication of
the Speedwire devices connected in line topology is working perfectly.
2. If the inverter's red LED does not flash, the Speedwire communication is defective. The
communication path must be checked.
12.6 Cleaning the Fans
1. DANGER
Danger to life due to high voltages
• Disconnect the inverter from all voltage sources (see Section 10, page 58).
2. Release the fan bracket on the right and left of the
inverter. To do so, press in the locking tabs and push
them upwards.
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