9 Returning and Disposing of the Defective Assembly
4. Connect the DC connector to the inverter in its original position.
☑ The DC connectors snap into place.
5. Ensure that all DC connectors are securely in place.
6. For STP 50-US-40 / STP 33-US-41 / STP 50-US-41 / STP 62-US-41: Turn the AC load-break
switch of the inverter to position I.
7. Switch on the AC circuit breaker.
☑ All three LEDs light up. The start-up phase begins.
☑ All three LEDs go out again after approximately 90 seconds.
8. Turn the DC load-break switch of the inverter to
position I.
9. If the green LED is still flashing, the conditions for activating feed-in operation are not yet met.
As soon as the conditions for feed-in operation are met, the inverter starts with feed-in
operation and, depending on the available power, the green LED will light up continuously or
it will pulse.
10. If the red LED lights up, an event has occurred. Find out which event has occurred and, if
necessary, initiate countermeasures.
11. Ensure that the inverter feeds in correctly.
9
Returning and Disposing of the Defective Assembly
If the defective assembly is to be returned, this will be stated on the order form.
Procedure:
1. If the defective assembly is to be returned:
• Pack the defective assembly for shipping. Use the original packaging for this, or
packaging that is suitable for the weight and size of the assembly.
• Organize the return shipment to SMA Solar Technology AG. Contact the Service.
2. If the assembly is not to be returned, dispose of the assembly in accordance with the locally
applicable disposal regulations for electronic waste.
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STP50-DC-EMV-DST-RM-xx-10
SMA Solar Technology AG
I
Replacement Manual